Python module for scanning running processes for various pieces of information ( mappings, open files, owner, commandline, etc )
This module works on UNIX-derived systems only (Linux, BSD, cygwin, etc)
What is a mapping?
A mapping can include the running executable (like python), a shared library (like libc) or something else (like a locale-archive file or other mapping).
You can use this module to, for example, scan for running processes to see what is using libpython2.7, or scan a paticular process for a mapping.
ProcessMappingScanner's functionality is exposed through a commandline tool, findProcessesUsing.
Mappings
Here are functions to scan running processes for mappings.
The following function, scanProcessForMapping, scans a single process for mappings. Use an empty string for searchPortion to get all mappings.
def scanProcessForMapping(pid, searchPortion, isExactMatch=False, ignoreCase=False):
'''
scanProcessForMapping - Searches a given pid's mappings for a certain pattern.
@param pid <int> - A running process ID on this system
@param searchPortion <str> - A mapping for which to search, example: libc or python or libz.so.1. Give empty string to return all mappings.
@param isExactMatch <bool> Default False - If match should be exact, otherwise a partial match is performed.
@param ignoreCase <bool> Default False - If True, search will be performed case-insensitively
@return <dict> - If result is found, the following dict is returned. If no match found on the given pid, or pid is not found running, None is returned.
{
'searchPortion' : The passed search pattern
'pid' : The passed pid (as an integer)
'owner' : String of process owner, or uid if no mapping can be found, or "unknown" if neither could be determined.
'cmdline' : Commandline string
'matchedMappings' : All mappings likes that matched the given search pattern
}
'''
The following function, scanAllProcessesForMapping, scans all running processes for mappings.
def scanAllProcessesForMapping(searchPortion, isExactMatch=False, ignoreCase=False):
'''
scanAllProcessesForMapping - Scans all processes on the system for a given search pattern.
@param searchPortion <str> - A mapping for which to search, example: libc or python or libz.so.1. Give empty string to return all mappings.
@param isExactMatch <bool> Default False - If match should be exact, otherwise a partial match is performed.
@param ignoreCase <bool> Default False - If True, search will be performed case-insensitively
@return - <dict> - A dictionary of pid -> mappingResults for each pid that matched the search pattern. For format of "mappingResults", @see scanProcessForMapping
'''
Owner
Here are the functions to determine whom is running a process
The following function returns information on the owner of a given process (uid, username):
def getProcessOwner(pid):
'''
getProcessOwner - Get the process owner of a pid
@param pid <int> - process id
@return - None if process not found or can't be determined. Otherwise, a dict:
{
uid - Owner UID
name - Owner name, or None if one cannot be determined
}
'''
The following functions returns a string of the owner of a given process:
def getProcessOwnerStr(pid):
'''
getProcessOwner - Get Process owner of a pid as a string instead of components (#getProcessOwner)
@return - Returns username if it can be determined, otherwise uid, otherwise "unknown"
'''
Commandline
The following functions get the commandline (executable and arguments) for a running process.
The following function returns a string of the commandline of a running process:
def getProcessCommandLineStr(pid):
'''
getProcessCommandLineStr - Gets a the commandline (program + arguments) of a given pid
@param pid <int> - Process ID
@return - None if process not found or can't be determined. Otherwise a string of commandline.
@note Caution, args may have spaces in them, and you cannot surmise from this method. If you care (like trying to replay a command), use getProcessCommandLineList instead
'''
The following function returns a list representing the "argv" of a process.
def getProcessCommandLineList(pid):
'''
getProcessCommandLineList - Gets the commandline (program + argumentS) of a given pid as a list.
@param pid <int> - Process ID
@return - None if process not found or can't be determined. Otherwise a list representing argv. First argument is process name, remainder are arguments.
@note - Use this if you care about whether a process had a space in the commands
'''
Files
The following functions deal with open file descriptors (fds) of running processes.
The following function returns information on a process
def scanProcessForOpenFile(pid, searchPortion, isExactMatch=True, ignoreCase=False):
'''
scanProcessForOpenFile - Scans open FDs for a given pid to see if any are the provided searchPortion
@param searchPortion <str> - Filename to check
@param isExactMatch <bool> Default True - If match should be exact, otherwise a partial match is performed.
@param ignoreCase <bool> Default False - If True, search will be performed case-insensitively
@return - If result is found, the following dict is returned. If no match found on the given pid, or the pid is not found running, None is returned.
{
'searchPortion' : The search portion provided
'pid' : The passed pid (as an integer)
'owner' : String of process owner, or "unknown" if one could not be determined
'cmdline' : Commandline string
'fds' : List of file descriptors assigned to this file (could be mapped several times)
'filenames' : List of the filenames matched
}
'''
The following function scans all processes on a system for an open file:
def scanAllProcessesForOpenFile(searchPortion, isExactMatch=True, ignoreCase=False):
'''
scanAllProcessessForOpenFile - Scans all processes on the system for a given filename
@param searchPortion <str> - Filename to check
@param isExactMatch <bool> Default True - If match should be exact, otherwise a partial match is performed.
@param ignoreCase <bool> Default False - If True, search will be performed case-insensitively
@return - <dict> - A dictionary of pid -> mappingResults for each pid that matched the search pattern. For format of "mappingResults", @see scanProcessForOpenFile
'''
The current working directory (CWD) of a process can be found via:
def getProcessCwd(pid)
'''
getProcessCwd - Gets the cwd (current working directory) of a given pid
@param pid <int> - Process ID
@return <str/None> - None if process not found or can't be determined. Otherwise, a string of the CWD
'''
Also contains scan functions, like those described above, scanProcessForCwd and scanAllProcessessForCwd.
General
The following are general functions
The following function returns a list of all pids running on a system
def getAllRunningPids()
Design
All of the "scan" series of functions return some extra information about the process (owner/cmdline). This is because processes can begin and end quickly, so it's better to get a complete snapshot than to not be able to obtain one later.
Pydoc can be found at: http://pythonhosted.org/ProcessMappingScanner/