ROLLOUT 4 · Azure/WALinuxAgent
azure__walinuxagent-547
Solved
314 stotal time
13tool calls
15model calls
5,419tokens generated
154,441prompt tokens read
No error recorded
⚠ The request log has 14 model calls but the trace has 16 agent calls, so tokens are listed separately instead of beside each turn.
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System instructions 4,822 characters
You are a principal Python software engineer resolving a repository issue in `/workspace`. Your sole objective is to produce a minimal, root-cause source patch that passes every hidden fail-to-pass and pass-to-pass regression test on the first grading run. ## Critical Environment & Grader Rules 1. **Air-Gapped Sandbox & Available CLI Tools**: No network access. Never run `pip`, `uv`, `conda`, or `git fetch`. Note: `rg` (`ripgrep`) is NOT installed in the container — always use `grep -rn --include="*.py"` for fast exact searches so you never waste a tool call on `command not found`. 2. **Protected Grading Paths**: Before running official verification, the grading harness **strips and reverts all changes** to `tests/`, `test/`, `testing/`, `test_*.py`, `*_test.py`, `conftest.py`, `pyproject.toml`, `setup.cfg`, `pytest.ini`, and `tox.ini`. Every part of your fix MUST reside in non-test production source files. 3. **Untracked File Trap (`git add -N .`)**: `submit_patch` stages ALL untracked files inside `/workspace`! Never leave reproduction or scratch files inside `/workspace` — run reproductions inline via `python3 - <<'PY'` or inside `/tmp/repro.py` in a single `run_command`. 4. **Stdout Truncation Rule**: `run_command` truncates stdout after the first 5,000 characters from the TOP. Always run pytest quietly with short tracebacks: `pytest path/to/test_file.py -k pattern -q --tb=short --no-header` If a test file is large, redirect output to `/tmp/pytest.log` and inspect `tail -n 80 /tmp/pytest.log` so failure tracebacks at the bottom are never cut off. 5. **Strict Pacing Discipline**: `get_status` and `submit_patch` are free and do NOT count toward `max_tool_calls`. Target **16-22 counted tool calls total**, and **begin your first `edit_file` change no later than tool call 15**. Reserve at least 4 calls for verification, `git status --short && git diff`, and submission. ## Execution Protocol ### Phase 1 — Pinpoint Code & Tests Immediately (1-2 tool calls) - The user message already contains `Workspace Layout` — do NOT waste a turn running `ls` on top-level directories. - Run a single compound `run_command` with `grep -rn --include="*.py"` to locate: (a) the exact symbols, error strings, or functions from the problem description, (b) **all parallel or sibling implementations** (for example sync + async variants, `Client` + `AsyncClient`, serializer + deserializer, multiple backends/dialects, base + subclass methods, `__init__.py` / `__all__` exports), and (c) the closest existing unit test files under `tests/`. ### Phase 2 — Deep Read & Spec Anchor (2-5 tool calls) - Use `read_file` with generous `start_line` and `end_line` windows (180-300 lines per call so you read whole modules in fewer calls) on the target function/class, callers, type annotations, and neighboring tests. - Before editing, verify every explicit and implicit requirement from the issue: exact parameter names, defaults, boundary/domain edge cases, exception types/messages, `None` vs empty collection vs falsy (`0`, `False`, `""`) semantics, mutability/copying, and return types. ### Phase 3 — Reproduce Bug in One Call (1 tool call) - Run ONE concise command (`python3 - <<'PY' ... PY` or targeted `pytest ... -q --tb=short --no-header`) via `run_command` to observe the exact pre-fix failure. Do NOT spend multiple tool calls writing separate reproduction scripts. ### Phase 4 — Surgical Implementation Across All Parallel Paths (1-4 tool calls) - Begin editing by tool call 15! Use `edit_file` with 4-6 lines of exact surrounding context copied from `read_file`. - Update ALL parallel codepaths (sync/async, multiple classes/dialects, type hints) consistently so partial fixes do not fail sibling tests. - **2-Strike Edit Rule**: If `edit_file` fails twice on the same block due to whitespace or escaping, do not retry `edit_file` a third time — apply an atomic Python transformation via `run_command` and immediately verify `python3 -m py_compile path/to/file.py`. ### Phase 5 — Edge-Case Verification, Diff Hygiene & Clean Exit (2-4 tool calls) - Run a single compound `run_command` testing both your reproduction + boundary edge cases (`None`, empty input, leading/trailing delimiters, subdomain/prefix boundaries, subclass/async parity) AND the relevant existing `pytest` module(s) with `-q --tb=short --no-header`. - Run `git status --short && git diff` via `run_command`. Confirm: - ZERO untracked (`??`) files in `/workspace` (`rm -f` any untracked workspace files immediately), - ZERO modifications to `tests/` or protected config files (`git checkout -- tests/` if touched), - Minimal, clean diff with valid imports and indentation. - Call `submit_patch` once verification passes, then respond with a brief 2-sentence plain-text summary and make NO further tool calls.
Task prompt 6,001 characters
You are evaluating a software engineering task for repository Azure/WALinuxAgent.
Problem Statement:
[2.2.0+] Cannot run waagent command inside any folder under /var/lib/waagent
Description of problem:
Cannot run any waagent command (such as: waagent -version, waagent -deprovision...) inside the any folder under /var/lib/waagent (such as: /var/lib/waagent/events)
It seems that if create a folder inside /var/lib/waagent, go into this folder, any waagent command cannot be run.
Version-Release number of selected component (if applicable):
WALinuxAgent-2.2.0+
RHEL Version:
RHEL-7.3
How reproducible:
100%
Steps to Reproduce:
1. Prepare a RHEL-7.3 VM with WALA-2.2.0+ installed.
2. Access to the /var/lib/waagent/events folder.
~]# cd /var/lib/waagent/events
4. Run waagent command
events]# waagent -version
Actual Result:
Raise exception. Cannot run this command.
events]# waagent -version
Traceback (most recent call last):
File "/sbin/waagent", line 31, in <module>
import azurelinuxagent.agent as agent
File "/usr/lib/python2.7/site-packages/azurelinuxagent/agent.py", line 29, in <module>
import azurelinuxagent.common.event as event
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/event.py", line 30, in <module>
from azurelinuxagent.common.protocol.restapi import TelemetryEventParam, \
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/protocol/__init__.py", line 18, in <module>
from azurelinuxagent.common.protocol.util import get_protocol_util, \
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/protocol/util.py", line 30, in <module>
from azurelinuxagent.common.osutil import get_osutil
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/osutil/__init__.py", line 18, in <module>
from azurelinuxagent.common.osutil.factory import get_osutil
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/osutil/factory.py", line 20, in <module>
from azurelinuxagent.common.version import DISTRO_NAME, DISTRO_VERSION, \
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module>
CURRENT_AGENT, CURRENT_VERSION = set_current_agent()
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent
version = AGENT_NAME_PATTERN.match(agent).group(1)
AttributeError: 'NoneType' object has no attribute 'group'
Expect Result:
Can run waagent command.
## Task Budget (Session terminates when any budget is exhausted)
- Time allowance: 7.5 minutes
- Tool calls allowance: 30 calls
- Max loop iterations: 40 turns
## Execution Environment Rules
- Single command timeout: 90 seconds (commands exceeding this fail without ending the session)
- Command output limit: 5000 characters
- File view limit: 150 lines per read_file call
- File character limit: 10000 characters per read_file call
- Environment is offline (no network/PyPI access). All repository and test dependencies are ALREADY pre-installed. Do NOT attempt to run pip install or download packages.
## Instructions:
0. All source code is under `/workspace`. Do NOT search outside `/workspace` (e.g. `/usr/`, `/wheels/`, system site-packages). If imports fail, the issue is in the source code under `/workspace`, not in missing system packages.
1. Analyze the problem statement and any provided hints carefully to identify all requested script paths, CLI subcommands, or Python modules.
2. Inspect existing codebase conventions and test files before making edits.
3. Verify your implementation using targeted tests or inline assertions before submitting.
4. Call submit_patch only after your implementation is complete and verified.
5. As your final action, you must return a text-only response reporting your completion to terminate the session.
## Workspace Layout
The repository is located at `/workspace`. Here is the directory tree (up to 3 levels):
```
./Changelog
./LICENSE.txt
./MAINTENANCE.md
./MANIFEST
./MANIFEST.in
./NOTICE
./README.md
./__main__.py
./azurelinuxagent
./azurelinuxagent/__init__.py
./azurelinuxagent/agent.py
./azurelinuxagent/common
./azurelinuxagent/common/__init__.py
./azurelinuxagent/common/conf.py
./azurelinuxagent/common/dhcp.py
./azurelinuxagent/common/event.py
./azurelinuxagent/common/exception.py
./azurelinuxagent/common/future.py
./azurelinuxagent/common/logger.py
./azurelinuxagent/common/osutil
./azurelinuxagent/common/protocol
./azurelinuxagent/common/rdma.py
./azurelinuxagent/common/utils
./azurelinuxagent/common/version.py
./azurelinuxagent/daemon
./azurelinuxagent/daemon/__init__.py
./azurelinuxagent/daemon/main.py
./azurelinuxagent/daemon/resourcedisk
./azurelinuxagent/daemon/scvmm.py
./azurelinuxagent/distro
./azurelinuxagent/distro/__init__.py
./azurelinuxagent/distro/suse
./azurelinuxagent/ga
./azurelinuxagent/ga/__init__.py
./azurelinuxagent/ga/env.py
./azurelinuxagent/ga/exthandlers.py
./azurelinuxagent/ga/monitor.py
./azurelinuxagent/ga/update.py
./azurelinuxagent/pa
./azurelinuxagent/pa/__init__.py
./azurelinuxagent/pa/deprovision
./azurelinuxagent/pa/provision
./azurelinuxagent/pa/rdma
./bin
./bin/waagent
./bin/waagent2.0
./config
./config/66-azure-storage.rules
./config/99-azure-product-uuid.rules
./config/alpine
./config/alpine/waagent.conf
./config/bigip
./config/bigip/waagent.conf
./config/clearlinux
./config/clearlinux/waagent.conf
./config/coreos
./config/coreos/waagent.conf
./config/freebsd
./config/freebsd/waagent.conf
./config/suse
./config/suse/waagent.conf
./config/ubuntu
./config/ubuntu/waagent.conf
./config/waagent.conf
./config/waagent.logrotate
./init
./init/clearlinux
./init/clearlinux/waagent.service
./init/coreos
./init/coreos/cloud-config.yml
./init/freebsd
./init/freebsd/waagent
./init/suse
./init/suse/waagent
./init/ubuntu
./init/ubuntu/walinuxagent
./init/ubuntu/walinuxagent.conf
./init/ubuntu/walinuxagent.service
./init/waagent
./init/waagent.service
./makepkg.py
./setup.py
./tests
```
Turn 1at 24 s383 tokens out3,912 prompt tokens
The user is reporting a bug where running `waagent` commands fails if the current working directory is under `/var/lib/waagent`.
The traceback provided in the issue description points to `azurelinuxagent/common/version.py`, line 87, in `set_current_agent`.
Specifically:
```python
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module>
CURRENT_AGENT, CURRENT_VERSION = set_current_agent()
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent
version = AGENT_NAME_PATTERN.match(agent).group(1)
AttributeError: 'NoneType' object has no attribute 'group'
```
This suggests that `AGENT_NAME_PATTERN.match(agent)` is returning `None`, and then `.group(1)` is called on it.
I need to examine `azurelinuxagent/common/version.py` around line 85 to see how `agent` is determined and what `AGENT_NAME_PATTERN` is.
The problem happens when the current working directory is under `/var/lib/waagent`. This suggests that `set_current_agent` might be doing something related to the current directory or searching for the agent executable in a way that's fooled by the CWD.
Let's start by reading `azurelinuxagent/common/version.py`.
TOOL CALL · read_file
{
"end_line": 100,
"filepath": "azurelinuxagent/common/version.py",
"start_line": 70
}Result of read_file 1,330 characters
{
"status": "ok",
"filepath": "azurelinuxagent/common/version.py",
"content": "\n # The platform.py lib has issue with detecting oracle linux distribution.\n # Merge the following patch provided by oracle as a temporary fix.\n if os.path.exists(\"/etc/oracle-release\"):\n osinfo[2] = \"oracle\"\n osinfo[3] = \"Oracle Linux\"\n\n # The platform.py lib has issue with detecting BIG-IP linux distribution.\n # Merge the following patch provided by F5.\n if os.path.exists(\"/shared/vadc\"):\n osinfo = get_f5_platform()\n\n # Remove trailing whitespace and quote in distro name\n osinfo[0] = osinfo[0].strip('\"').strip(' ').lower()\n return osinfo\n\n\nAGENT_NAME = \"WALinuxAgent\"\nAGENT_LONG_NAME = \"Azure Linux Agent\"\nAGENT_VERSION = '2.2.2'\nAGENT_LONG_VERSION = \"{0}-{1}\".format(AGENT_NAME, AGENT_VERSION)\nAGENT_DESCRIPTION = \"\"\"\\\nThe Azure Linux Agent supports the provisioning and running of Linux\nVMs in the Azure cloud. This package should be installed on Linux disk\nimages that are built to run in the Azure environment.\n\"\"\"\n\nAGENT_DIR_GLOB = \"{0}-*\".format(AGENT_NAME)\nAGENT_PKG_GLOB = \"{0}-*.zip\".format(AGENT_NAME)\n\nAGENT_PATTERN = \"{0}-(.*)\".format(AGENT_NAME)",
"start_line": 70,
"end_line": 100,
"total_lines": 172,
"is_truncated": false
}Turn 2at 41 s296 tokens out4,723 prompt tokens
Wait, I read lines 70-100 and I don't see `set_current_agent` yet. I see `AGENT_PATTERN` at line 100. Let me read more of the file, specifically looking for `set_current_agent` and `AGENT_NAME_PATTERN`. Actually, the traceback said: `File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module> CURRENT_AGENT, CURRENT_VERSION = set_current_agent()` and `File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent version = AGENT_NAME_PATTERN.match(agent).group(1)` Wait, the line numbers in the traceback might be from a different version of the code than what's in `/workspace`. The code I read has `AGENT_PATTERN` but not `AGENT_NAME_PATTERN` in that range. Let me read the whole file or at least a larger chunk from where `set_current_agent` might be.
TOOL CALL · read_file
{
"end_line": 172,
"filepath": "azurelinuxagent/common/version.py",
"start_line": 101
}Result of read_file 2,455 characters
{
"status": "ok",
"filepath": "azurelinuxagent/common/version.py",
"content": "AGENT_NAME_PATTERN = re.compile(AGENT_PATTERN)\nAGENT_DIR_PATTERN = re.compile(\".*/{0}\".format(AGENT_PATTERN))\n\nEXT_HANDLER_PATTERN = b\".*/WALinuxAgent-(\\w.\\w.\\w[.\\w]*)-.*-run-exthandlers\"\nEXT_HANDLER_REGEX = re.compile(EXT_HANDLER_PATTERN)\n\n# Set the CURRENT_AGENT and CURRENT_VERSION to match the agent directory name\n# - This ensures the agent will \"see itself\" using the same name and version\n# as the code that downloads agents.\ndef set_current_agent():\n path = os.getcwd()\n lib_dir = conf.get_lib_dir()\n if lib_dir[-1] != os.path.sep:\n lib_dir += os.path.sep\n if path[:len(lib_dir)] != lib_dir:\n agent = AGENT_LONG_VERSION\n version = AGENT_VERSION\n else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n version = AGENT_NAME_PATTERN.match(agent).group(1)\n return agent, FlexibleVersion(version)\nCURRENT_AGENT, CURRENT_VERSION = set_current_agent()\n\ndef set_goal_state_agent():\n agent = None\n pids = [pid for pid in os.listdir('/proc') if pid.isdigit()]\n for pid in pids:\n try:\n pname = open(os.path.join('/proc', pid, 'cmdline'), 'rb').read()\n match = EXT_HANDLER_REGEX.match(pname)\n if match:\n agent = match.group(1)\n break\n except IOError:\n continue\n if agent is None:\n agent = CURRENT_VERSION\n return agent\nGOAL_STATE_AGENT_VERSION = set_goal_state_agent()\n\ndef is_current_agent_installed():\n return CURRENT_AGENT == AGENT_LONG_VERSION\n\n\n__distro__ = get_distro()\nDISTRO_NAME = __distro__[0]\nDISTRO_VERSION = __distro__[1]\nDISTRO_CODE_NAME = __distro__[2]\nDISTRO_FULL_NAME = __distro__[3]\n\nPY_VERSION = sys.version_info\nPY_VERSION_MAJOR = sys.version_info[0]\nPY_VERSION_MINOR = sys.version_info[1]\nPY_VERSION_MICRO = sys.version_info[2]\n\n\"\"\"\nAdd this workaround for detecting Snappy Ubuntu Core temporarily, until ubuntu\nfixed this bug: https://bugs.launchpad.net/snappy/+bug/1481086\n\"\"\"\n\n\ndef is_snappy():\n if os.path.exists(\"/etc/motd\"):\n motd = fileutil.read_file(\"/etc/motd\")\n if \"snappy\" in motd:\n return True\n return False\n\n\nif is_snappy():\n DISTRO_FULL_NAME = \"Snappy Ubuntu Core\"\n",
"start_line": 101,
"end_line": 172,
"total_lines": 172,
"is_truncated": false
}Turn 3at 94 s898 tokens out5,857 prompt tokens
I found the code:
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
The logic seems to be:
1. Get the current working directory (`os.getcwd()`).
2. Get the library directory where the agent is installed (`conf.get_lib_dir()`).
3. If the current working directory is NOT under the library directory, use the default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
4. If the current working directory IS under the library directory, it assumes that the first subdirectory under `lib_dir` is the agent directory (e.g., `WALinuxAgent-2.2.0`). It then tries to extract the version from that directory name using `AGENT_NAME_PATTERN`.
The problem description says: "Cannot run waagent command... inside the any folder under /var/lib/waagent (such as: /var/lib/waagent/events)".
If `conf.get_lib_dir()` returns `/var/lib/waagent` and the current working directory is `/var/lib/waagent/events`, then:
- `path` = `/var/lib/waagent/events`
- `lib_dir` = `/var/lib/waagent/`
- `path[:len(lib_dir)]` is `/var/lib/waagent/`, which matches `lib_dir`.
- `agent = path[len(lib_dir):].split(os.path.sep)[0]`
- `path[len(lib_dir):]` is `events`
- `agent` is `events`.
- `version = AGENT_NAME_PATTERN.match(agent).group(1)`
- `AGENT_NAME_PATTERN` is compiled from `AGENT_PATTERN = "{0}-(.*)".format(AGENT_NAME)` where `AGENT_NAME = "WALinuxAgent"`.
- So `AGENT_NAME_PATTERN` matches `WALinuxAgent-(.*)`.
- `AGENT_NAME_PATTERN.match("events")` returns `None`.
- `.group(1)` calls on `None` and raises `AttributeError: 'NoneType' object has no attribute 'group'`.
This perfectly matches the reported bug.
The goal of `set_current_agent` seems to be to identify which version of the agent is running if the agent is being executed from within its own installed directory (which might happen during an upgrade or when multiple versions are installed).
If the current directory is under the agent's library directory but not inside a directory that matches the `WALinuxAgent-*` pattern, it should probably just fallback to the default version.
Wait, if the CWD is `/var/lib/waagent/events`, and `lib_dir` is `/var/lib/waagent/`, it's technically "under" the lib dir, but not in a versioned agent directory.
If `AGENT_NAME_PATTERN.match(agent)` fails, we should probably use the default version.
Let's verify this with a reproduction script. I'll need to mock `conf.get_lib_dir()` or set the CWD to something that simulates the failure.
Actually, I can just write a small script that imports the logic and mocks the environment.
Wait, `conf.get_lib_dir()` is used. I should check what it does.
TOOL CALL · read_file
{
"filepath": "azurelinuxagent/common/conf.py"
}Result of read_file 4,760 characters
{
"status": "ok",
"filepath": "azurelinuxagent/common/conf.py",
"content": "# Microsoft Azure Linux Agent\n#\n# Copyright 2014 Microsoft Corporation\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n# http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n#\n# Requires Python 2.4+ and Openssl 1.0+\n#\n\n\"\"\"\nModule conf loads and parses configuration file\n\"\"\"\nimport os\nimport azurelinuxagent.common.utils.fileutil as fileutil\nfrom azurelinuxagent.common.exception import AgentConfigError\n\n\nclass ConfigurationProvider(object):\n \"\"\"\n Parse amd store key:values in /etc/waagent.conf.\n \"\"\"\n\n def __init__(self):\n self.values = dict()\n\n def load(self, content):\n if not content:\n raise AgentConfigError(\"Can't not parse empty configuration\")\n for line in content.split('\\n'):\n if not line.startswith(\"#\") and \"=\" in line:\n parts = line.split()[0].split('=')\n value = parts[1].strip(\"\\\" \")\n if value != \"None\":\n self.values[parts[0]] = value\n else:\n self.values[parts[0]] = None\n\n def get(self, key, default_val):\n val = self.values.get(key)\n return val if val is not None else default_val\n\n def get_switch(self, key, default_val):\n val = self.values.get(key)\n if val is not None and val.lower() == 'y':\n return True\n elif val is not None and val.lower() == 'n':\n return False\n return default_val\n\n def get_int(self, key, default_val):\n try:\n return int(self.values.get(key))\n except TypeError:\n return default_val\n except ValueError:\n return default_val\n\n\n__conf__ = ConfigurationProvider()\n\n\ndef load_conf_from_file(conf_file_path, conf=__conf__):\n \"\"\"\n Load conf file from: conf_file_path\n \"\"\"\n if os.path.isfile(conf_file_path) == False:\n raise AgentConfigError((\"Missing configuration in {0}\"\n \"\").format(conf_file_path))\n try:\n content = fileutil.read_file(conf_file_path)\n conf.load(content)\n except IOError as err:\n raise AgentConfigError((\"Failed to load conf file:{0}, {1}\"\n \"\").format(conf_file_path, err))\n\n\ndef enable_rdma(conf=__conf__):\n return conf.get_switch(\"OS.EnableRDMA\", False) or \\\n conf.get_switch(\"OS.UpdateRdmaDriver\", False) or \\\n conf.get_switch(\"OS.CheckRdmaDriver\", False)\n\n\ndef get_logs_verbose(conf=__conf__):\n return conf.get_switch(\"Logs.Verbose\", False)\n\n\ndef get_lib_dir(conf=__conf__):\n return conf.get(\"Lib.Dir\", \"/var/lib/waagent\")\n\n\ndef get_published_hostname(conf=__conf__):\n return os.path.join(get_lib_dir(conf), 'published_hostname')\n\n\ndef get_dvd_mount_point(conf=__conf__):\n return conf.get(\"DVD.MountPoint\", \"/mnt/cdrom/secure\")\n\n\ndef get_agent_pid_file_path(conf=__conf__):\n return conf.get(\"Pid.File\", \"/var/run/waagent.pid\")\n\n\ndef get_ext_log_dir(conf=__conf__):\n return conf.get(\"Extension.LogDir\", \"/var/log/azure\")\n\n\ndef get_openssl_cmd(conf=__conf__):\n return conf.get(\"OS.OpensslPath\", \"/usr/bin/openssl\")\n\n\ndef get_home_dir(conf=__conf__):\n return conf.get(\"OS.HomeDir\", \"/home\")\n\n\ndef get_passwd_file_path(conf=__conf__):\n return conf.get(\"OS.PasswordPath\", \"/etc/shadow\")\n\n\ndef get_sudoers_dir(conf=__conf__):\n return conf.get(\"OS.SudoersDir\", \"/etc/sudoers.d\")\n\n\ndef get_sshd_conf_file_path(conf=__conf__):\n return conf.get(\"OS.SshdConfigPath\", \"/etc/ssh/sshd_config\")\n\n\ndef get_root_device_scsi_timeout(conf=__conf__):\n return conf.get(\"OS.RootDeviceScsiTimeout\", None)\n\n\ndef get_ssh_host_keypair_type(conf=__conf__):\n return conf.get(\"Provisioning.SshHostKeyPairType\", \"rsa\")\n\n\ndef get_provision_enabled(conf=__conf__):\n return conf.get_switch(\"Provisioning.Enabled\", True)\n\n\ndef get_allow_reset_sys_user(conf=__conf__):\n return conf.get_switch(\"Provisioning.AllowResetSysUser\", False)",
"start_line": 1,
"end_line": 150,
"total_lines": 229,
"is_truncated": true
}Turn 4at 132 s778 tokens out8,290 prompt tokens
`get_lib_dir` returns `conf.get("Lib.Dir", "/var/lib/waagent")`. So by default it is `/var/lib/waagent`.
Now let's write a reproduction script to confirm the bug. I'll mock `os.getcwd()` and `azurelinuxagent.common.conf.get_lib_dir`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport os\nimport re\nfrom unittest.mock import patch, MagicMock\n\n# Mocking some of the classes and constants that are used in set_current_agent\nclass FlexibleVersion(object):\n def __init__(self, version):\n self.version = version\n def __repr__(self):\n return self.version\n\nAGENT_NAME = \"WALinuxAgent\"\nAGENT_VERSION = '2.2.2'\nAGENT_LONG_NAME = \"Azure Linux Agent\"\nAGENT_LONG_VERSION = \"{0}-{1}\".format(AGENT_NAME, AGENT_VERSION)\nAGENT_PATTERN = \"{0}-(.*)\".format(AGENT_NAME)\nAGENT_NAME_PATTERN = re.compile(AGENT_PATTERN)\n\ndef set_current_agent(getcwd_val, lib_dir_val):\n path = getcwd_val\n lib_dir = lib_dir_val\n if lib_dir[-1] != os.path.sep:\n lib_dir += os.path.sep\n if path[:len(lib_dir)] != lib_dir:\n agent = AGENT_LONG_VERSION\n version = AGENT_VERSION\n else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n try:\n version = AGENT_NAME_PATTERN.match(agent).group(1)\n except AttributeError:\n print(f\"Caught expected AttributeError: AGENT_NAME_PATTERN.match({agent!r}) is None\")\n raise\n return agent, FlexibleVersion(version)\n\n# Test 1: CWD is outside lib_dir\ntry:\n print(\"Test 1: CWD is /tmp, lib_dir is /var/lib/waagent\")\n print(set_current_agent(\"/tmp\", \"/var/lib/waagent\"))\n print(\"Success\")\nexcept Exception as e:\n print(f\"Failure: {e}\")\n\n# Test 2: CWD is inside a versioned agent directory in lib_dir\ntry:\n print(\"\\nTest 2: CWD is /var/lib/waagent/WALinuxAgent-2.2.2, lib_dir is /var/lib/waagent\")\n print(set_current_agent(\"/var/lib/waagent/WALinuxAgent-2.2.2\", \"/var/lib/waagent\"))\n print(\"Success\")\nexcept Exception as e:\n print(f\"Failure: {e}\")\n\n# Test 3: CWD is inside a non-versioned directory in lib_dir (The Bug)\ntry:\n print(\"\\nTest 3: CWD is /var/lib/waagent/events, lib_dir is /var/lib/waagent\")\n print(set_current_agent(\"/var/lib/waagent/events\", \"/var/lib/waagent\"))\n print(\"Success\")\nexcept Exception as e:\n print(f\"Failure: {e}\")\nPY\n"
}Result of run_command 473 characters
{
"status": "ok",
"stdout": "Test 1: CWD is /tmp, lib_dir is /var/lib/waagent\n('WALinuxAgent-2.2.2', 2.2.2)\nSuccess\n\nTest 2: CWD is /var/lib/waagent/WALinuxAgent-2.2.2, lib_dir is /var/lib/waagent\n('WALinuxAgent-2.2.2', 2.2.2)\nSuccess\n\nTest 3: CWD is /var/lib/waagent/events, lib_dir is /var/lib/waagent\nCaught expected AttributeError: AGENT_NAME_PATTERN.match('events') is None\nFailure: 'NoneType' object has no attribute 'group'\n",
"stderr": "",
"exit_code": 0
}Turn 5at 169 s852 tokens out9,281 prompt tokens
The bug is confirmed. When the CWD is under `lib_dir` but the first directory level doesn't match `WALinuxAgent-.*`, it crashes.
The fix is to check if `AGENT_NAME_PATTERN.match(agent)` is not `None` before calling `.group(1)`. If it is `None`, it should fallback to the default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
Let's look at the code again:
```python
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I should change the `else` block.
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
```
Wait, if `match` is `None`, and I set `agent = AGENT_LONG_VERSION` and `version = AGENT_VERSION`, that would be correct.
Let's re-verify this logic with a script.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport os\nimport re\n\nclass FlexibleVersion(object):\n def __init__(self, version):\n self.version = version\n def __repr__(self):\n return self.version\n\nAGENT_NAME = \"WALinuxAgent\"\nAGENT_VERSION = '2.2.2'\nAGENT_LONG_NAME = \"Azure Linux Agent\"\nAGENT_LONG_VERSION = \"{0}-{1}\".format(AGENT_NAME, AGENT_VERSION)\nAGENT_PATTERN = \"{0}-(.*)\".format(AGENT_NAME)\nAGENT_NAME_PATTERN = re.compile(AGENT_PATTERN)\n\ndef set_current_agent_fixed(getcwd_val, lib_dir_val):\n path = getcwd_val\n lib_dir = lib_dir_val\n if lib_dir[-1] != os.path.sep:\n lib_dir += os.path.sep\n if path[:len(lib_dir)] != lib_dir:\n agent = AGENT_LONG_VERSION\n version = AGENT_VERSION\n else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n match = AGENT_NAME_PATTERN.match(agent)\n if match:\n version = match.group(1)\n else:\n agent = AGENT_LONG_VERSION\n version = AGENT_VERSION\n return agent, FlexibleVersion(version)\n\n# Test 1: CWD is outside lib_dir\nprint(f\"Test 1: {set_current_agent_fixed('/tmp', '/var/lib/waagent')}\")\n\n# Test 2: CWD is inside a versioned agent directory in lib_dir\nprint(f\"Test 2: {set_current_agent_fixed('/var/lib/waagent/WALinuxAgent-2.2.2', '/var/lib/waagent')}\")\n\n# Test 3: CWD is inside a non-versioned directory in lib_dir\nprint(f\"Test 3: {set_current_agent_fixed('/var/lib/waagent/events', '/var/lib/waagent')}\")\nPY\n"
}Result of run_command 177 characters
{
"status": "ok",
"stdout": "Test 1: ('WALinuxAgent-2.2.2', 2.2.2)\nTest 2: ('WALinuxAgent-2.2.2', 2.2.2)\nTest 3: ('WALinuxAgent-2.2.2', 2.2.2)\n",
"stderr": "",
"exit_code": 0
}Turn 6at 188 s546 tokens out10,243 prompt tokens
The fix works as expected. Now I'll apply it to `azurelinuxagent/common/version.py`.
The original code was:
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I will replace it with:
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
return agent, FlexibleVersion(version)
```
Let me double check the surroundings.
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I'll prepare the `edit_file` call.
TOOL CALL · edit_file
{
"filepath": "azurelinuxagent/common/version.py",
"new_string": " else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n match = AGENT_NAME_PATTERN.match(agent)\n if match:\n version = match.group(1)\n else:\n agent = AGENT_LONG_VERSION\n version = AGENT_VERSION\n return agent, FlexibleVersion(version)",
"old_string": " else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n version = AGENT_NAME_PATTERN.match(agent).group(1)\n return agent, FlexibleVersion(version)"
}Result of edit_file 717 characters
{
"status": "ok",
"filepath": "azurelinuxagent/common/version.py",
"occurrences": 1,
"strategy": "exact",
"diff": "--- a/azurelinuxagent/common/version.py\n+++ b/azurelinuxagent/common/version.py\n@@ -117,7 +117,12 @@\n version = AGENT_VERSION\n else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n- version = AGENT_NAME_PATTERN.match(agent).group(1)\n+ match = AGENT_NAME_PATTERN.match(agent)\n+ if match:\n+ version = match.group(1)\n+ else:\n+ agent = AGENT_LONG_VERSION\n+ version = AGENT_VERSION\n return agent, FlexibleVersion(version)\n CURRENT_AGENT, CURRENT_VERSION = set_current_agent()\n \n",
"is_truncated": false
}Turn 7at 218 s373 tokens out11,038 prompt tokens
Now I should verify the fix. I'll run the same reproduction script again, but this time I'll actually import `set_current_agent` if possible, or just run it with the provided mock. Since I can't easily set up the whole environment and mock `os.getcwd()` in a way that affects the imported module's top-level execution, I'll use a simple script that modifies the environment and then imports it. Wait, `CURRENT_AGENT, CURRENT_VERSION = set_current_agent()` is called at the module level in `azurelinuxagent/common/version.py`. This means as soon as the module is imported, `set_current_agent()` is executed. So I can do this:
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport os\nfrom unittest.mock import patch\n\n# We need to mock os.getcwd and conf.get_lib_dir BEFORE importing azurelinuxagent.common.version\n# But conf is also imported in version.py.\n# Let's mock them using patch.\n\nwith patch('os.getcwd', return_value='/var/lib/waagent/events'):\n with patch('azurelinuxagent.common.conf.get_lib_dir', return_value='/var/lib/waagent'):\n try:\n import azurelinuxagent.common.version as version\n print(f\"CURRENT_AGENT: {version.CURRENT_AGENT}\")\n print(f\"CURRENT_VERSION: {version.CURRENT_VERSION}\")\n print(\"Success\")\n except Exception as e:\n import traceback\n traceback.print_exc()\n print(\"Failure\")\nPY\n"
}Result of run_command 128 characters
{
"status": "ok",
"stdout": "CURRENT_AGENT: WALinuxAgent-2.2.2\nCURRENT_VERSION: 2.2.2\nSuccess\n",
"stderr": "",
"exit_code": 0
}Turn 8at 232 s262 tokens out11,480 prompt tokens
The reproduction script succeeded! Let's also verify it with `WALinuxAgent-2.2.2` folder.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport os\nfrom unittest.mock import patch\nimport sys\n\n# Since azurelinuxagent.common.version might already be in sys.modules, we need to remove it\nif 'azurelinuxagent.common.version' in sys.modules:\n del sys.modules['azurelinuxagent.common.version']\n\nwith patch('os.getcwd', return_value='/var/lib/waagent/WALinuxAgent-2.2.2'):\n with patch('azurelinuxagent.common.conf.get_lib_dir', return_value='/var/lib/waagent'):\n try:\n import azurelinuxagent.common.version as version\n print(f\"CURRENT_AGENT: {version.CURRENT_AGENT}\")\n print(f\"CURRENT_VERSION: {version.CURRENT_VERSION}\")\n print(\"Success\")\n except Exception as e:\n import traceback\n traceback.print_exc()\n print(\"Failure\")\nPY\n"
}Result of run_command 128 characters
{
"status": "ok",
"stdout": "CURRENT_AGENT: WALinuxAgent-2.2.2\nCURRENT_VERSION: 2.2.2\nSuccess\n",
"stderr": "",
"exit_code": 0
}Turn 9at 240 s199 tokens out11,811 prompt tokens
And outside.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport os\nfrom unittest.mock import patch\nimport sys\n\nif 'azurelinuxagent.common.version' in sys.modules:\n del sys.modules['azurelinuxagent.common.version']\n\nwith patch('os.getcwd', return_value='/tmp'):\n with patch('azurelinuxagent.common.conf.get_lib_dir', return_value='/var/lib/waagent'):\n try:\n import azurelinuxagent.common.version as version\n print(f\"CURRENT_AGENT: {version.CURRENT_AGENT}\")\n print(f\"CURRENT_VERSION: {version.CURRENT_VERSION}\")\n print(\"Success\")\n except Exception as e:\n import traceback\n traceback.print_exc()\n print(\"Failure\")\nPY\n"
}Result of run_command 128 characters
{
"status": "ok",
"stdout": "CURRENT_AGENT: WALinuxAgent-2.2.2\nCURRENT_VERSION: 2.2.2\nSuccess\n",
"stderr": "",
"exit_code": 0
}Turn 10at 249 s105 tokens out12,079 prompt tokens
Everything seems correct. I'll do a final check for any other parallel paths. The function `set_current_agent` is only defined in `azurelinuxagent/common/version.py` and used there to set `CURRENT_AGENT` and `CURRENT_VERSION`. I should check if `AGENT_NAME_PATTERN` is used anywhere else.
TOOL CALL · run_command
{
"command": "grep -rn \"AGENT_NAME_PATTERN\" azurelinuxagent/"
}Result of run_command 453 characters
{
"status": "ok",
"stdout": "azurelinuxagent/ga/update.py:46: AGENT_PATTERN, AGENT_NAME_PATTERN, AGENT_DIR_PATTERN, \\\nazurelinuxagent/common/version.py:101:AGENT_NAME_PATTERN = re.compile(AGENT_PATTERN)\nazurelinuxagent/common/version.py:120: match = AGENT_NAME_PATTERN.match(agent)\n",
"stderr": "grep: azurelinuxagent/common/__pycache__/version.cpython-37.pyc: binary file matches\n",
"exit_code": 0
}Turn 11at 254 s63 tokens out12,343 prompt tokens
It is imported in `azurelinuxagent/ga/update.py`. Let me check how it is used there.
TOOL CALL · read_file
{
"end_line": 60,
"filepath": "azurelinuxagent/ga/update.py",
"start_line": 30
}Result of read_file 1,558 characters
{
"status": "ok",
"filepath": "azurelinuxagent/ga/update.py",
"content": "import zipfile\n\nimport azurelinuxagent.common.conf as conf\nimport azurelinuxagent.common.logger as logger\nimport azurelinuxagent.common.utils.fileutil as fileutil\nimport azurelinuxagent.common.utils.restutil as restutil\nimport azurelinuxagent.common.utils.textutil as textutil\n\nfrom azurelinuxagent.common.event import add_event, WALAEventOperation\nfrom azurelinuxagent.common.exception import UpdateError, ProtocolError\nfrom azurelinuxagent.common.future import ustr\nfrom azurelinuxagent.common.osutil import get_osutil\nfrom azurelinuxagent.common.protocol import get_protocol_util\nfrom azurelinuxagent.common.utils.flexible_version import FlexibleVersion\nfrom azurelinuxagent.common.version import AGENT_NAME, AGENT_VERSION, AGENT_LONG_VERSION, \\\n AGENT_DIR_GLOB, AGENT_PKG_GLOB, \\\n AGENT_PATTERN, AGENT_NAME_PATTERN, AGENT_DIR_PATTERN, \\\n CURRENT_AGENT, CURRENT_VERSION, \\\n is_current_agent_installed\n\nfrom azurelinuxagent.ga.exthandlers import HandlerManifest\n\n\nAGENT_ERROR_FILE = \"error.json\" # File name for agent error record\nAGENT_MANIFEST_FILE = \"HandlerManifest.json\"\n\nCHILD_HEALTH_INTERVAL = 15 * 60\nCHILD_LAUNCH_INTERVAL = 5 * 60\nCHILD_LAUNCH_RESTART_MAX = 3\nCHILD_POLL_INTERVAL = 60\n",
"start_line": 30,
"end_line": 60,
"total_lines": 883,
"is_truncated": false
}Turn 12at 260 s72 tokens out12,859 prompt tokens
It's imported but I didn't see the usage in this snippet. Let's find where it's used in `azurelinuxagent/ga/update.py`.
TOOL CALL · run_command
{
"command": "grep -n \"AGENT_NAME_PATTERN\" azurelinuxagent/ga/update.py"
}Result of run_command 165 characters
{
"status": "ok",
"stdout": "46: AGENT_PATTERN, AGENT_NAME_PATTERN, AGENT_DIR_PATTERN, \\\n",
"stderr": "",
"exit_code": 0
}Turn 13at 300 s445 tokens out12,994 prompt tokens
Wait, if it's only imported at line 46 and not used anywhere else in the file, then my change in `version.py` shouldn't affect it. And anyway, my change was inside `set_current_agent`, it didn't change the `AGENT_NAME_PATTERN` object itself. I'm confident with the fix. Final check: - Problem: `waagent` fails if CWD is under `/var/lib/waagent` but not in a `WALinuxAgent-X.Y.Z` folder. - Cause: `set_current_agent` in `azurelinuxagent/common/version.py` calls `.group(1)` on the result of `AGENT_NAME_PATTERN.match(agent)` without checking if the result is `None`. - Fix: Check if `match` is not `None`. If it is `None`, fallback to default `AGENT_LONG_VERSION` and `AGENT_VERSION`. - Verification: Reproduced with mock, verified the fix with mock. One more thing: the problem statement mentions `Azure/WALinuxAgent` and Python 2.7 (`/usr/lib/python2.7/site-packages/azurelinuxagent/agent.py`). My reproduction used Python 3, but the logic for `re.match` and `os.getcwd()` is the same in Python 2 and 3 for this use case. Wait, the reproduction script using `patch` might be slightly different in Py2, but the core logic of the bug is independent of the Python version. I'll just make sure there are no Py2-specific issues. In Python 2, `os.path.sep` is `/`. `os.getcwd()` returns a string. `re.match` returns a match object or `None`. `.group(1)` works on match objects. All this is consistent. I'll run `git status --short && git diff` before submitting.
TOOL CALL · run_command
{
"command": "git status --short && git diff"
}Result of run_command 816 characters
{
"status": "ok",
"stdout": " M azurelinuxagent/common/version.py\ndiff --git a/azurelinuxagent/common/version.py b/azurelinuxagent/common/version.py\nindex 1099e25..ac58b50 100644\n--- a/azurelinuxagent/common/version.py\n+++ b/azurelinuxagent/common/version.py\n@@ -117,7 +117,12 @@ def set_current_agent():\n version = AGENT_VERSION\n else:\n agent = path[len(lib_dir):].split(os.path.sep)[0]\n- version = AGENT_NAME_PATTERN.match(agent).group(1)\n+ match = AGENT_NAME_PATTERN.match(agent)\n+ if match:\n+ version = match.group(1)\n+ else:\n+ agent = AGENT_LONG_VERSION\n+ version = AGENT_VERSION\n return agent, FlexibleVersion(version)\n CURRENT_AGENT, CURRENT_VERSION = set_current_agent()\n \n",
"stderr": "",
"exit_code": 0
}Turn 14at 302 s18 tokens out13,737 prompt tokens
The diff looks clean and correct.
TOOL CALL · submit_patch
Result of submit_patch 55 characters
{
"status": "ok",
"patch_size": 700,
"files_changed": 1
}Turn 15at 311 s129 tokens out13,794 prompt tokens
I have resolved the issue.
Turn 16at 311 s
The bug was caused by `azurelinuxagent/common/version.py` calling `.group(1)` on the result of `AGENT_NAME_PATTERN.match(agent)` without verifying that the match was successful. This led to an `AttributeError` when the current working directory was a subdirectory of the agent's library directory that did not match the expected `WALinuxAgent-*` pattern (e.g., `/var/lib/waagent/events`). The fix adds a check for the match result and falls back to the default agent version if no match is found.
Model calls (not matched to turns)
Generated tokens 383 tokens · stopped: STOP
The user is reporting a bug where running `waagent` commands fails if the current working directory is under `/var/lib/waagent`.
The traceback provided in the issue description points to `azurelinuxagent/common/version.py`, line 87, in `set_current_agent`.
Specifically:
```python
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module>
CURRENT_AGENT, CURRENT_VERSION = set_current_agent()
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent
version = AGENT_NAME_PATTERN.match(agent).group(1)
AttributeError: 'NoneType' object has no attribute 'group'
```
This suggests that `AGENT_NAME_PATTERN.match(agent)` is returning `None`, and then `.group(1)` is called on it.
I need to examine `azurelinuxagent/common/version.py` around line 85 to see how `agent` is determined and what `AGENT_NAME_PATTERN` is.
The problem happens when the current working directory is under `/var/lib/waagent`. This suggests that `set_current_agent` might be doing something related to the current directory or searching for the agent executable in a way that's fooled by the CWD.
Let's start by reading `azurelinuxagent/common/version.py`.<|channel>thought
The user is reporting a bug where running `waagent` commands fails if the current working directory is under `/var/lib/waagent`.
The traceback provided in the issue description points to `azurelinuxagent/common/version.py`, line 87, in `set_current_agent`.
Specifically:
```python
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module>
CURRENT_AGENT, CURRENT_VERSION = set_current_agent()
File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent
version = AGENT_NAME_PATTERN.match(agent).group(1)
AttributeError: 'NoneType' object has no attribute 'group'
```
This suggests that `AGENT_NAME_PATTERN.match(agent)` is returning `None`, and then `.group(1)` is called on it.
I need to examine `azurelinuxagent/common/version.py` around line 85 to see how `agent` is determined and what `AGENT_NAME_PATTERN` is.
The problem happens when the current working directory is under `/var/lib/waagent`. This suggests that `set_current_agent` might be doing something related to the current directory or searching for the agent executable in a way that's fooled by the CWD.
Let's start by reading `azurelinuxagent/common/version.py`.<channel|><|tool_call>call:read_file{filepath:<|"|>azurelinuxagent/common/version.py<|"|>,start_line:70,end_line:100}<tool_call|><|tool_response>
Generated tokens 296 tokens · stopped: STOP
Wait, I read lines 70-100 and I don't see `set_current_agent` yet. I see `AGENT_PATTERN` at line 100. Let me read more of the file, specifically looking for `set_current_agent` and `AGENT_NAME_PATTERN`. Actually, the traceback said: `File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module> CURRENT_AGENT, CURRENT_VERSION = set_current_agent()` and `File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent version = AGENT_NAME_PATTERN.match(agent).group(1)` Wait, the line numbers in the traceback might be from a different version of the code than what's in `/workspace`. The code I read has `AGENT_PATTERN` but not `AGENT_NAME_PATTERN` in that range. Let me read the whole file or at least a larger chunk from where `set_current_agent` might be.
Wait, I read lines 70-100 and I don't see `set_current_agent` yet. I see `AGENT_PATTERN` at line 100. Let me read more of the file, specifically looking for `set_current_agent` and `AGENT_NAME_PATTERN`.
Actually, the traceback said:
`File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 87, in <module> CURRENT_AGENT, CURRENT_VERSION = set_current_agent()`
and
`File "/usr/lib/python2.7/site-packages/azurelinuxagent/common/version.py", line 85, in set_current_agent version = AGENT_NAME_PATTERN.match(agent).group(1)`
Wait, the line numbers in the traceback might be from a different version of the code than what's in `/workspace`. The code I read has `AGENT_PATTERN` but not `AGENT_NAME_PATTERN` in that range.
Let me read the whole file or at least a larger chunk from where `set_current_agent` might be.
<channel|><|tool_call>call:read_file{end_line:172,filepath:<|"|>azurelinuxagent/common/version.py<|"|>,start_line:101}<tool_call|><|tool_response>
Generated tokens 898 tokens · stopped: STOP
I found the code:
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
The logic seems to be:
1. Get the current working directory (`os.getcwd()`).
2. Get the library directory where the agent is installed (`conf.get_lib_dir()`).
3. If the current working directory is NOT under the library directory, use the default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
4. If the current working directory IS under the library directory, it assumes that the first subdirectory under `lib_dir` is the agent directory (e.g., `WALinuxAgent-2.2.0`). It then tries to extract the version from that directory name using `AGENT_NAME_PATTERN`.
The problem description says: "Cannot run waagent command... inside the any folder under /var/lib/waagent (such as: /var/lib/waagent/events)".
If `conf.get_lib_dir()` returns `/var/lib/waagent` and the current working directory is `/var/lib/waagent/events`, then:
- `path` = `/var/lib/waagent/events`
- `lib_dir` = `/var/lib/waagent/`
- `path[:len(lib_dir)]` is `/var/lib/waagent/`, which matches `lib_dir`.
- `agent = path[len(lib_dir):].split(os.path.sep)[0]`
- `path[len(lib_dir):]` is `events`
- `agent` is `events`.
- `version = AGENT_NAME_PATTERN.match(agent).group(1)`
- `AGENT_NAME_PATTERN` is compiled from `AGENT_PATTERN = "{0}-(.*)".format(AGENT_NAME)` where `AGENT_NAME = "WALinuxAgent"`.
- So `AGENT_NAME_PATTERN` matches `WALinuxAgent-(.*)`.
- `AGENT_NAME_PATTERN.match("events")` returns `None`.
- `.group(1)` calls on `None` and raises `AttributeError: 'NoneType' object has no attribute 'group'`.
This perfectly matches the reported bug.
The goal of `set_current_agent` seems to be to identify which version of the agent is running if the agent is being executed from within its own installed directory (which might happen during an upgrade or when multiple versions are installed).
If the current directory is under the agent's library directory but not inside a directory that matches the `WALinuxAgent-*` pattern, it should probably just fallback to the default version.
Wait, if the CWD is `/var/lib/waagent/events`, and `lib_dir` is `/var/lib/waagent/`, it's technically "under" the lib dir, but not in a versioned agent directory.
If `AGENT_NAME_PATTERN.match(agent)` fails, we should probably use the default version.
Let's verify this with a reproduction script. I'll need to mock `conf.get_lib_dir()` or set the CWD to something that simulates the failure.
Actually, I can just write a small script that imports the logic and mocks the environment.
Wait, `conf.get_lib_dir()` is used. I should check what it does.
I found the code:
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
The logic seems to be:
1. Get the current working directory (`os.getcwd()`).
2. Get the library directory where the agent is installed (`conf.get_lib_dir()`).
3. If the current working directory is NOT under the library directory, use the default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
4. If the current working directory IS under the library directory, it assumes that the first subdirectory under `lib_dir` is the agent directory (e.g., `WALinuxAgent-2.2.0`). It then tries to extract the version from that directory name using `AGENT_NAME_PATTERN`.
The problem description says: "Cannot run waagent command... inside the any folder under /var/lib/waagent (such as: /var/lib/waagent/events)".
If `conf.get_lib_dir()` returns `/var/lib/waagent` and the current working directory is `/var/lib/waagent/events`, then:
- `path` = `/var/lib/waagent/events`
- `lib_dir` = `/var/lib/waagent/`
- `path[:len(lib_dir)]` is `/var/lib/waagent/`, which matches `lib_dir`.
- `agent = path[len(lib_dir):].split(os.path.sep)[0]`
- `path[len(lib_dir):]` is `events`
- `agent` is `events`.
- `version = AGENT_NAME_PATTERN.match(agent).group(1)`
- `AGENT_NAME_PATTERN` is compiled from `AGENT_PATTERN = "{0}-(.*)".format(AGENT_NAME)` where `AGENT_NAME = "WALinuxAgent"`.
- So `AGENT_NAME_PATTERN` matches `WALinuxAgent-(.*)`.
- `AGENT_NAME_PATTERN.match("events")` returns `None`.
- `.group(1)` calls on `None` and raises `AttributeError: 'NoneType' object has no attribute 'group'`.
This perfectly matches the reported bug.
The goal of `set_current_agent` seems to be to identify which version of the agent is running if the agent is being executed from within its own installed directory (which might happen during an upgrade or when multiple versions are installed).
If the current directory is under the agent's library directory but not inside a directory that matches the `WALinuxAgent-*` pattern, it should probably just fallback to the default version.
Wait, if the CWD is `/var/lib/waagent/events`, and `lib_dir` is `/var/lib/waagent/`, it's technically "under" the lib dir, but not in a versioned agent directory.
If `AGENT_NAME_PATTERN.match(agent)` fails, we should probably use the default version.
Let's verify this with a reproduction script. I'll need to mock `conf.get_lib_dir()` or set the CWD to something that simulates the failure.
Actually, I can just write a small script that imports the logic and mocks the environment.
Wait, `conf.get_lib_dir()` is used. I should check what it does.
<channel|><|tool_call>call:read_file{filepath:<|"|>azurelinuxagent/common/conf.py<|"|>}<tool_call|><|tool_response>
Generated tokens 778 tokens · stopped: STOP
`get_lib_dir` returns `conf.get("Lib.Dir", "/var/lib/waagent")`. So by default it is `/var/lib/waagent`.
Now let's write a reproduction script to confirm the bug. I'll mock `os.getcwd()` and `azurelinuxagent.common.conf.get_lib_dir`.
`get_lib_dir` returns `conf.get("Lib.Dir", "/var/lib/waagent")`. So by default it is `/var/lib/waagent`.
Now let's write a reproduction script to confirm the bug. I'll mock `os.getcwd()` and `azurelinuxagent.common.conf.get_lib_dir`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import os
import re
from unittest.mock import patch, MagicMock
# Mocking some of the classes and constants that are used in set_current_agent
class FlexibleVersion(object):
def __init__(self, version):
self.version = version
def __repr__(self):
return self.version
AGENT_NAME = "WALinuxAgent"
AGENT_VERSION = '2.2.2'
AGENT_LONG_NAME = "Azure Linux Agent"
AGENT_LONG_VERSION = "{0}-{1}".format(AGENT_NAME, AGENT_VERSION)
AGENT_PATTERN = "{0}-(.*)".format(AGENT_NAME)
AGENT_NAME_PATTERN = re.compile(AGENT_PATTERN)
def set_current_agent(getcwd_val, lib_dir_val):
path = getcwd_val
lib_dir = lib_dir_val
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
try:
version = AGENT_NAME_PATTERN.match(agent).group(1)
except AttributeError:
print(f"Caught expected AttributeError: AGENT_NAME_PATTERN.match({agent!r}) is None")
raise
return agent, FlexibleVersion(version)
# Test 1: CWD is outside lib_dir
try:
print("Test 1: CWD is /tmp, lib_dir is /var/lib/waagent")
print(set_current_agent("/tmp", "/var/lib/waagent"))
print("Success")
except Exception as e:
print(f"Failure: {e}")
# Test 2: CWD is inside a versioned agent directory in lib_dir
try:
print("\nTest 2: CWD is /var/lib/waagent/WALinuxAgent-2.2.2, lib_dir is /var/lib/waagent")
print(set_current_agent("/var/lib/waagent/WALinuxAgent-2.2.2", "/var/lib/waagent"))
print("Success")
except Exception as e:
print(f"Failure: {e}")
# Test 3: CWD is inside a non-versioned directory in lib_dir (The Bug)
try:
print("\nTest 3: CWD is /var/lib/waagent/events, lib_dir is /var/lib/waagent")
print(set_current_agent("/var/lib/waagent/events", "/var/lib/waagent"))
print("Success")
except Exception as e:
print(f"Failure: {e}")
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 852 tokens · stopped: STOP
The bug is confirmed. When the CWD is under `lib_dir` but the first directory level doesn't match `WALinuxAgent-.*`, it crashes.
The fix is to check if `AGENT_NAME_PATTERN.match(agent)` is not `None` before calling `.group(1)`. If it is `None`, it should fallback to the default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
Let's look at the code again:
```python
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I should change the `else` block.
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
```
Wait, if `match` is `None`, and I set `agent = AGENT_LONG_VERSION` and `version = AGENT_VERSION`, that would be correct.
Let's re-verify this logic with a script.
The bug is confirmed. When the CWD is under `lib_dir` but the first directory level doesn't match `WALinuxAgent-.*`, it crashes.
The fix is to check if `AGENT_NAME_PATTERN.match(agent)` is not `None` before calling `.group(1)`. If it is `None`, it should fallback to the default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
Let's look at the code again:
```python
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I should change the `else` block.
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
```
Wait, if `match` is `None`, and I set `agent = AGENT_LONG_VERSION` and `version = AGENT_VERSION`, that would be correct.
Let's re-verify this logic with a script.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import os
import re
class FlexibleVersion(object):
def __init__(self, version):
self.version = version
def __repr__(self):
return self.version
AGENT_NAME = "WALinuxAgent"
AGENT_VERSION = '2.2.2'
AGENT_LONG_NAME = "Azure Linux Agent"
AGENT_LONG_VERSION = "{0}-{1}".format(AGENT_NAME, AGENT_VERSION)
AGENT_PATTERN = "{0}-(.*)".format(AGENT_NAME)
AGENT_NAME_PATTERN = re.compile(AGENT_PATTERN)
def set_current_agent_fixed(getcwd_val, lib_dir_val):
path = getcwd_val
lib_dir = lib_dir_val
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
return agent, FlexibleVersion(version)
# Test 1: CWD is outside lib_dir
print(f"Test 1: {set_current_agent_fixed('/tmp', '/var/lib/waagent')}")
# Test 2: CWD is inside a versioned agent directory in lib_dir
print(f"Test 2: {set_current_agent_fixed('/var/lib/waagent/WALinuxAgent-2.2.2', '/var/lib/waagent')}")
# Test 3: CWD is inside a non-versioned directory in lib_dir
print(f"Test 3: {set_current_agent_fixed('/var/lib/waagent/events', '/var/lib/waagent')}")
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 546 tokens · stopped: STOP
The fix works as expected. Now I'll apply it to `azurelinuxagent/common/version.py`.
The original code was:
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I will replace it with:
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
return agent, FlexibleVersion(version)
```
Let me double check the surroundings.
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I'll prepare the `edit_file` call.The fix works as expected. Now I'll apply it to `azurelinuxagent/common/version.py`.
The original code was:
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I will replace it with:
```python
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
return agent, FlexibleVersion(version)
```
Let me double check the surroundings.
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib_dir[-1] != os.path.sep:
lib_dir += os.path.sep
if path[:len(lib_dir)] != lib_dir:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)
```
I'll prepare the `edit_file` call.<channel|><|tool_call>call:edit_file{filepath:<|"|>azurelinuxagent/common/version.py<|"|>,new_string:<|"|> else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
match = AGENT_NAME_PATTERN.match(agent)
if match:
version = match.group(1)
else:
agent = AGENT_LONG_VERSION
version = AGENT_VERSION
return agent, FlexibleVersion(version)<|"|>,old_string:<|"|> else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
version = AGENT_NAME_PATTERN.match(agent).group(1)
return agent, FlexibleVersion(version)<|"|>}<tool_call|><|tool_response>
Generated tokens 373 tokens · stopped: STOP
Now I should verify the fix. I'll run the same reproduction script again, but this time I'll actually import `set_current_agent` if possible, or just run it with the provided mock. Since I can't easily set up the whole environment and mock `os.getcwd()` in a way that affects the imported module's top-level execution, I'll use a simple script that modifies the environment and then imports it. Wait, `CURRENT_AGENT, CURRENT_VERSION = set_current_agent()` is called at the module level in `azurelinuxagent/common/version.py`. This means as soon as the module is imported, `set_current_agent()` is executed. So I can do this:
Now I should verify the fix. I'll run the same reproduction script again, but this time I'll actually import `set_current_agent` if possible, or just run it with the provided mock. Since I can't easily set up the whole environment and mock `os.getcwd()` in a way that affects the imported module's top-level execution, I'll use a simple script that modifies the environment and then imports it.
Wait, `CURRENT_AGENT, CURRENT_VERSION = set_current_agent()` is called at the module level in `azurelinuxagent/common/version.py`. This means as soon as the module is imported, `set_current_agent()` is executed.
So I can do this:
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import os
from unittest.mock import patch
# We need to mock os.getcwd and conf.get_lib_dir BEFORE importing azurelinuxagent.common.version
# But conf is also imported in version.py.
# Let's mock them using patch.
with patch('os.getcwd', return_value='/var/lib/waagent/events'):
with patch('azurelinuxagent.common.conf.get_lib_dir', return_value='/var/lib/waagent'):
try:
import azurelinuxagent.common.version as version
print(f"CURRENT_AGENT: {version.CURRENT_AGENT}")
print(f"CURRENT_VERSION: {version.CURRENT_VERSION}")
print("Success")
except Exception as e:
import traceback
traceback.print_exc()
print("Failure")
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 262 tokens · stopped: STOP
The reproduction script succeeded! Let's also verify it with `WALinuxAgent-2.2.2` folder.
The reproduction script succeeded!
Let's also verify it with `WALinuxAgent-2.2.2` folder.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import os
from unittest.mock import patch
import sys
# Since azurelinuxagent.common.version might already be in sys.modules, we need to remove it
if 'azurelinuxagent.common.version' in sys.modules:
del sys.modules['azurelinuxagent.common.version']
with patch('os.getcwd', return_value='/var/lib/waagent/WALinuxAgent-2.2.2'):
with patch('azurelinuxagent.common.conf.get_lib_dir', return_value='/var/lib/waagent'):
try:
import azurelinuxagent.common.version as version
print(f"CURRENT_AGENT: {version.CURRENT_AGENT}")
print(f"CURRENT_VERSION: {version.CURRENT_VERSION}")
print("Success")
except Exception as e:
import traceback
traceback.print_exc()
print("Failure")
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 199 tokens · stopped: STOP
And outside.
And outside.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import os
from unittest.mock import patch
import sys
if 'azurelinuxagent.common.version' in sys.modules:
del sys.modules['azurelinuxagent.common.version']
with patch('os.getcwd', return_value='/tmp'):
with patch('azurelinuxagent.common.conf.get_lib_dir', return_value='/var/lib/waagent'):
try:
import azurelinuxagent.common.version as version
print(f"CURRENT_AGENT: {version.CURRENT_AGENT}")
print(f"CURRENT_VERSION: {version.CURRENT_VERSION}")
print("Success")
except Exception as e:
import traceback
traceback.print_exc()
print("Failure")
PY
<|"|>}<tool_call|><|tool_response>
Generated tokens 105 tokens · stopped: STOP
Everything seems correct. I'll do a final check for any other parallel paths. The function `set_current_agent` is only defined in `azurelinuxagent/common/version.py` and used there to set `CURRENT_AGENT` and `CURRENT_VERSION`. I should check if `AGENT_NAME_PATTERN` is used anywhere else.
Everything seems correct. I'll do a final check for any other parallel paths.
The function `set_current_agent` is only defined in `azurelinuxagent/common/version.py` and used there to set `CURRENT_AGENT` and `CURRENT_VERSION`.
I should check if `AGENT_NAME_PATTERN` is used anywhere else.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "AGENT_NAME_PATTERN" azurelinuxagent/<|"|>}<tool_call|><|tool_response>
Generated tokens 63 tokens · stopped: STOP
It is imported in `azurelinuxagent/ga/update.py`. Let me check how it is used there.
It is imported in `azurelinuxagent/ga/update.py`. Let me check how it is used there.
<channel|><|tool_call>call:read_file{end_line:60,filepath:<|"|>azurelinuxagent/ga/update.py<|"|>,start_line:30}<tool_call|><|tool_response>
Generated tokens 72 tokens · stopped: STOP
It's imported but I didn't see the usage in this snippet. Let's find where it's used in `azurelinuxagent/ga/update.py`.
It's imported but I didn't see the usage in this snippet. Let's find where it's used in `azurelinuxagent/ga/update.py`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -n "AGENT_NAME_PATTERN" azurelinuxagent/ga/update.py<|"|>}<tool_call|><|tool_response>
Generated tokens 445 tokens · stopped: STOP
Wait, if it's only imported at line 46 and not used anywhere else in the file, then my change in `version.py` shouldn't affect it. And anyway, my change was inside `set_current_agent`, it didn't change the `AGENT_NAME_PATTERN` object itself. I'm confident with the fix. Final check: - Problem: `waagent` fails if CWD is under `/var/lib/waagent` but not in a `WALinuxAgent-X.Y.Z` folder. - Cause: `set_current_agent` in `azurelinuxagent/common/version.py` calls `.group(1)` on the result of `AGENT_NAME_PATTERN.match(agent)` without checking if the result is `None`. - Fix: Check if `match` is not `None`. If it is `None`, fallback to default `AGENT_LONG_VERSION` and `AGENT_VERSION`. - Verification: Reproduced with mock, verified the fix with mock. One more thing: the problem statement mentions `Azure/WALinuxAgent` and Python 2.7 (`/usr/lib/python2.7/site-packages/azurelinuxagent/agent.py`). My reproduction used Python 3, but the logic for `re.match` and `os.getcwd()` is the same in Python 2 and 3 for this use case. Wait, the reproduction script using `patch` might be slightly different in Py2, but the core logic of the bug is independent of the Python version. I'll just make sure there are no Py2-specific issues. In Python 2, `os.path.sep` is `/`. `os.getcwd()` returns a string. `re.match` returns a match object or `None`. `.group(1)` works on match objects. All this is consistent. I'll run `git status --short && git diff` before submitting.
Wait, if it's only imported at line 46 and not used anywhere else in the file, then my change in `version.py` shouldn't affect it. And anyway, my change was inside `set_current_agent`, it didn't change the `AGENT_NAME_PATTERN` object itself.
I'm confident with the fix.
Final check:
- Problem: `waagent` fails if CWD is under `/var/lib/waagent` but not in a `WALinuxAgent-X.Y.Z` folder.
- Cause: `set_current_agent` in `azurelinuxagent/common/version.py` calls `.group(1)` on the result of `AGENT_NAME_PATTERN.match(agent)` without checking if the result is `None`.
- Fix: Check if `match` is not `None`. If it is `None`, fallback to default `AGENT_LONG_VERSION` and `AGENT_VERSION`.
- Verification: Reproduced with mock, verified the fix with mock.
One more thing: the problem statement mentions `Azure/WALinuxAgent` and Python 2.7 (`/usr/lib/python2.7/site-packages/azurelinuxagent/agent.py`). My reproduction used Python 3, but the logic for `re.match` and `os.getcwd()` is the same in Python 2 and 3 for this use case.
Wait, the reproduction script using `patch` might be slightly different in Py2, but the core logic of the bug is independent of the Python version. I'll just make sure there are no Py2-specific issues.
In Python 2, `os.path.sep` is `/`. `os.getcwd()` returns a string. `re.match` returns a match object or `None`. `.group(1)` works on match objects. All this is consistent.
I'll run `git status --short && git diff` before submitting.<channel|><|tool_call>call:run_command{command:<|"|>git status --short && git diff<|"|>}<tool_call|><|tool_response>
Generated tokens 18 tokens · stopped: STOP
The diff looks clean and correct.
The diff looks clean and correct.
<channel|><|tool_call>call:submit_patch{}<tool_call|><|tool_response>
Patch, tests and logs
Final code change Included
diff --git a/azurelinuxagent/common/version.py b/azurelinuxagent/common/version.py
index 1099e25..ac58b50 100644
--- a/azurelinuxagent/common/version.py
+++ b/azurelinuxagent/common/version.py
@@ -117,7 +117,12 @@ def set_current_agent():
version = AGENT_VERSION
else:
agent = path[len(lib_dir):].split(os.path.sep)[0]
- version = AGENT_NAME_PATTERN.match(agent).group(1)
+ match = AGENT_NAME_PATTERN.match(agent)
+ if match:
+ version = match.group(1)
+ else:
+ agent = AGENT_LONG_VERSION
+ version = AGENT_VERSION
return agent, FlexibleVersion(version)
CURRENT_AGENT, CURRENT_VERSION = set_current_agent()
Test output Included
============================= test session starts ============================== collected 9 items tests/common/test_version.py ......... [100%] ==================================== PASSES ==================================== - generated xml file: /tmp/rebench-grade-bff362010613479aa5ab13df78fc06c7.xml -- =========================== short test summary info ============================ PASSED tests/common/test_version.py::TestCurrentAgentName::test_extract_name_finds_installed PASSED tests/common/test_version.py::TestCurrentAgentName::test_extract_name_finds_latest_agent PASSED tests/common/test_version.py::TestCurrentAgentName::test_extract_name_in_path_finds_installed PASSED tests/common/test_version.py::TestCurrentAgentName::test_extract_name_root_finds_installed PASSED tests/common/test_version.py::TestGetF5Platforms::test_get_f5_platform_bigip_12_0_0 PASSED tests/common/test_version.py::TestGetF5Platforms::test_get_f5_platform_bigip_12_1_0_hf1 PASSED tests/common/test_version.py::TestGetF5Platforms::test_get_f5_platform_bigip_12_1_1 PASSED tests/common/test_version.py::TestGetF5Platforms::test_get_f5_platform_bigiq_5_1_0 PASSED tests/common/test_version.py::TestGetF5Platforms::test_get_f5_platform_iworkflow_2_0_1 ============================== 9 passed in 0.13s ===============================
Test errors Included
Test report (JUnit) Included
<?xml version="1.0" encoding="utf-8"?><testsuites><testsuite errors="0" failures="0" hostname="f63e43f960a2" name="pytest" skipped="0" tests="9" time="0.138" timestamp="2026-11-14T03:24:19.043611"><testcase classname="tests.common.test_version.TestCurrentAgentName" name="test_extract_name_finds_installed" time="0.001" /><testcase classname="tests.common.test_version.TestCurrentAgentName" name="test_extract_name_finds_latest_agent" time="0.001" /><testcase classname="tests.common.test_version.TestCurrentAgentName" name="test_extract_name_in_path_finds_installed" time="0.001" /><testcase classname="tests.common.test_version.TestCurrentAgentName" name="test_extract_name_root_finds_installed" time="0.001" /><testcase classname="tests.common.test_version.TestGetF5Platforms" name="test_get_f5_platform_bigip_12_0_0" time="0.002" /><testcase classname="tests.common.test_version.TestGetF5Platforms" name="test_get_f5_platform_bigip_12_1_0_hf1" time="0.010" /><testcase classname="tests.common.test_version.TestGetF5Platforms" name="test_get_f5_platform_bigip_12_1_1" time="0.001" /><testcase classname="tests.common.test_version.TestGetF5Platforms" name="test_get_f5_platform_bigiq_5_1_0" time="0.001" /><testcase classname="tests.common.test_version.TestGetF5Platforms" name="test_get_f5_platform_iworkflow_2_0_1" time="0.001" /></testsuite></testsuites>
Agent log Included
[ 0.0s] 📋 System Prompt: You are a principal Python software engineer resolving a repository issue in `/workspace`.
[ 0.0s] 🎯 Task Prompt: You are evaluating a software engineering task for repository Azure/WALinuxAgent.
[ 22.8s] 💭 (1227 chars) "The user is reporting a bug where running `waagent` commands fails if the current working
directory is under `/var/lib/w..."
[ 22.8s] 📖 read_file (azurelinuxagent/common/version.py)
[ 22.8s] ✓ {'status': 'ok', 'filepath': 'azurelinuxagent/common/version.py', 'content': '\n # The platform.py
lib has issue with…
[ 39.9s] 💭 (838 chars) "Wait, I read lines 70-100 and I don't see `set_current_agent` yet. I see `AGENT_PATTERN` at
line 100. Let me read more o..."
[ 39.9s] 📖 read_file (azurelinuxagent/common/version.py)
[ 39.9s] ✓ {'status': 'ok', 'filepath': 'azurelinuxagent/common/version.py', 'content': 'AGENT_NAME_PATTERN =
re.compile(AGENT_PATT…
[ 93.4s] 💭 (2973 chars) "I found the code:
```python
def set_current_agent():
path = os.getcwd()
lib_dir = conf.get_lib_dir()
if lib..."
[ 93.4s] 📖 read_file (azurelinuxagent/common/conf.py)
[ 93.5s] ✓ {'status': 'ok', 'filepath': 'azurelinuxagent/common/conf.py', 'content': '# Microsoft Azure Linux
Agent\n#\n# Copyright…
[ 130.8s] 💭 (234 chars) "`get_lib_dir` returns `conf.get("Lib.Dir", "/var/lib/waagent")`. So by default it is
`/var/lib/waagent`.
Now let's writ..."
[ 130.8s] 🔧 run_command (60 lines) python3 - <<'PY'
[ 130.9s] → Test 1: CWD is /tmp, lib_dir is /var/lib/waagent
[ 168.2s] 💭 (1118 chars) "The bug is confirmed. When the CWD is under `lib_dir` but the first directory level doesn't
match `WALinuxAgent-.*`, it ..."
[ 168.2s] 🔧 run_command (44 lines) python3 - <<'PY'
[ 168.3s] → Test 1: ('WALinuxAgent-2.2.2', 2.2.2)
[ 186.5s] 💭 (1147 chars) "The fix works as expected. Now I'll apply it to `azurelinuxagent/common/version.py`.
The original code was:
```python
..."
[ 186.5s] ✏️ edit_file (azurelinuxagent/common/version.py)
[ 186.7s] ✓ {'status': 'ok', 'filepath': 'azurelinuxagent/common/version.py', 'occurrences': 1, 'strategy': 'exact',
'diff': '--- a/…
[ 217.1s] 💭 (626 chars) "Now I should verify the fix. I'll run the same reproduction script again, but this time I'll
actually import `set_curren..."
[ 217.1s] 🔧 run_command (20 lines) python3 - <<'PY'
[ 217.3s] → CURRENT_AGENT: WALinuxAgent-2.2.2
[ 230.5s] 💭 (90 chars) "The reproduction script succeeded!
Let's also verify it with `WALinuxAgent-2.2.2` folder."
[ 230.5s] 🔧 run_command (21 lines) python3 - <<'PY'
[ 230.6s] → CURRENT_AGENT: WALinuxAgent-2.2.2
[ 239.0s] 💭 (12 chars) "And outside."
[ 239.0s] 🔧 run_command (20 lines) python3 - <<'PY'
[ 239.2s] → CURRENT_AGENT: WALinuxAgent-2.2.2
[ 247.8s] 💭 (289 chars) "Everything seems correct. I'll do a final check for any other parallel paths.
The function `set_current_agent` is only d..."
[ 247.8s] 🔧 run_command grep -rn "AGENT_NAME_PATTERN" azurelinuxagent/
[ 247.9s] → azurelinuxagent/ga/update.py:46: AGENT_PATTERN,
AGENT_NAME_PATTERN, AGENT_DIR
[ 252.8s] 💭 (84 chars) "It is imported in `azurelinuxagent/ga/update.py`. Let me check how it is used there."
[ 252.8s] 📖 read_file (azurelinuxagent/ga/update.py)
[ 252.8s] ✓ {'status': 'ok', 'filepath': 'azurelinuxagent/ga/update.py', 'content': 'import zipfile\n\nimport
azurelinuxagent.common…
[ 258.8s] 💭 (119 chars) "It's imported but I didn't see the usage in this snippet. Let's find where it's used in
`azurelinuxagent/ga/update.py`."
[ 258.8s] 🔧 run_command grep -n "AGENT_NAME_PATTERN" azurelinuxagent/ga/update.py
[ 258.8s] → 46: AGENT_PATTERN, AGENT_NAME_PATTERN, AGENT_DIR_PATTERN, \
[ 299.4s] 💭 (1463 chars) "Wait, if it's only imported at line 46 and not used anywhere else in the file, then my
change in `version.py` shouldn't ..."
[ 299.4s] 🔧 run_command git status --short && git diff
[ 299.5s] → M azurelinuxagent/common/version.py
[ 300.7s] 💭 (33 chars) "The diff looks clean and correct."
[ 300.7s] 🤖 submit_patch
[ 300.8s] → submit_patch: {"status": "ok", "patch_size": 700, "files_changed": 1}
[ 309.6s] 💭 (26 chars) "I have resolved the issue."
[ 309.6s] ✅ Agent finished: The bug was caused by `azurelinuxagent/common/version.py` calling `.group(1)` on the
result of `AGENT_NAME_PATTERN.match(agent)` without verifying that the match was successful. This led to an `Attrib...
Native result row
{
"agent_error": null,
"duration_seconds": 313.8,
"error": null,
"grade": {
"collected_tests": 9,
"competition_junit_ok": true,
"error": null,
"required_issues_count": 0,
"resolved": true,
"status_counts": {
"PASSED": 9
},
"strict_clean_patch": true,
"test_exit_code": 0
},
"instance_id": "azure__walinuxagent-547",
"pass_idx": 0,
"patch_chars": 700,
"phase1_seconds": 313.07,
"repo": "Azure/WALinuxAgent",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/azure__walinuxagent-547__p0__r4.jsonl",
"resolved": true,
"rollout_idx": 4,
"run_key": "azure__walinuxagent-547__p0__r4",
"strict_clean_patch": true,
"tool_calls": 13,
"total_llm_calls": 15,
"trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_azure__walinuxagent-547__p0__r4.json"
}