277 lines
10 KiB
Python
Executable File
277 lines
10 KiB
Python
Executable File
#!/usr/bin/env python
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import os
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import re
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import sys
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def _write_message(kind, message):
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import inspect, os, sys
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# Get the file/line where this message was generated.
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f = inspect.currentframe()
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# Step out of _write_message, and then out of wrapper.
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f = f.f_back.f_back
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file,line,_,_,_ = inspect.getframeinfo(f)
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location = '%s:%d' % (os.path.basename(file), line)
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print >>sys.stderr, '%s: %s: %s' % (location, kind, message)
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note = lambda message: _write_message('note', message)
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warning = lambda message: _write_message('warning', message)
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error = lambda message: (_write_message('error', message), sys.exit(1))
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def re_full_match(pattern, str):
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m = re.match(pattern, str)
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if m and m.end() != len(str):
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m = None
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return m
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def parse_time(value):
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minutes,value = value.split(':',1)
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if '.' in value:
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seconds,fseconds = value.split('.',1)
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else:
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seconds = value
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return int(minutes) * 60 + int(seconds) + float('.'+fseconds)
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def extractExecutable(command):
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"""extractExecutable - Given a string representing a command line, attempt
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to extract the executable path, even if it includes spaces."""
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# Split into potential arguments.
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args = command.split(' ')
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# Scanning from the beginning, try to see if the first N args, when joined,
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# exist. If so that's probably the executable.
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for i in range(1,len(args)):
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cmd = ' '.join(args[:i])
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if os.path.exists(cmd):
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return cmd
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# Otherwise give up and return the first "argument".
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return args[0]
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class Struct:
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def __init__(self, **kwargs):
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self.fields = kwargs.keys()
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self.__dict__.update(kwargs)
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def __repr__(self):
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return 'Struct(%s)' % ', '.join(['%s=%r' % (k,getattr(self,k))
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for k in self.fields])
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kExpectedPSFields = [('PID', int, 'pid'),
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('USER', str, 'user'),
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('COMMAND', str, 'command'),
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('%CPU', float, 'cpu_percent'),
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('TIME', parse_time, 'cpu_time'),
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('VSZ', int, 'vmem_size'),
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('RSS', int, 'rss')]
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def getProcessTable():
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import subprocess
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p = subprocess.Popen(['ps', 'aux'], stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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out,err = p.communicate()
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res = p.wait()
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if p.wait():
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error('unable to get process table')
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elif err.strip():
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error('unable to get process table: %s' % err)
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lns = out.split('\n')
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it = iter(lns)
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header = it.next().split()
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numRows = len(header)
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# Make sure we have the expected fields.
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indexes = []
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for field in kExpectedPSFields:
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try:
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indexes.append(header.index(field[0]))
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except:
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if opts.debug:
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raise
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error('unable to get process table, no %r field.' % field[0])
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table = []
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for i,ln in enumerate(it):
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if not ln.strip():
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continue
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fields = ln.split(None, numRows - 1)
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if len(fields) != numRows:
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warning('unable to process row: %r' % ln)
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continue
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record = {}
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for field,idx in zip(kExpectedPSFields, indexes):
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value = fields[idx]
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try:
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record[field[2]] = field[1](value)
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except:
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if opts.debug:
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raise
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warning('unable to process %r in row: %r' % (field[0], ln))
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break
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else:
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# Add our best guess at the executable.
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record['executable'] = extractExecutable(record['command'])
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table.append(Struct(**record))
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return table
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def getSignalValue(name):
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import signal
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if name.startswith('SIG'):
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value = getattr(signal, name)
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if value and isinstance(value, int):
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return value
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error('unknown signal: %r' % name)
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import signal
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kSignals = {}
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for name in dir(signal):
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if name.startswith('SIG') and name == name.upper() and name.isalpha():
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kSignals[name[3:]] = getattr(signal, name)
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def main():
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global opts
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from optparse import OptionParser, OptionGroup
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parser = OptionParser("usage: %prog [options] {pid}*")
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# FIXME: Add -NNN and -SIGNAME options.
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parser.add_option("-s", "", dest="signalName",
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help="Name of the signal to use (default=%default)",
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action="store", default='INT',
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choices=kSignals.keys())
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parser.add_option("-l", "", dest="listSignals",
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help="List known signal names",
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action="store_true", default=False)
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parser.add_option("-n", "--dry-run", dest="dryRun",
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help="Only print the actions that would be taken",
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action="store_true", default=False)
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parser.add_option("-v", "--verbose", dest="verbose",
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help="Print more verbose output",
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action="store_true", default=False)
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parser.add_option("", "--debug", dest="debug",
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help="Enable debugging output",
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action="store_true", default=False)
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parser.add_option("", "--force", dest="force",
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help="Perform the specified commands, even if it seems like a bad idea",
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action="store_true", default=False)
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inf = float('inf')
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group = OptionGroup(parser, "Process Filters")
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group.add_option("", "--name", dest="execName", metavar="REGEX",
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help="Kill processes whose name matches the given regexp",
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action="store", default=None)
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group.add_option("", "--exec", dest="execPath", metavar="REGEX",
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help="Kill processes whose executable matches the given regexp",
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action="store", default=None)
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group.add_option("", "--user", dest="userName", metavar="REGEX",
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help="Kill processes whose user matches the given regexp",
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action="store", default=None)
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group.add_option("", "--min-cpu", dest="minCPU", metavar="PCT",
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help="Kill processes with CPU usage >= PCT",
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action="store", type=float, default=None)
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group.add_option("", "--max-cpu", dest="maxCPU", metavar="PCT",
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help="Kill processes with CPU usage <= PCT",
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action="store", type=float, default=inf)
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group.add_option("", "--min-mem", dest="minMem", metavar="N",
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help="Kill processes with virtual size >= N (MB)",
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action="store", type=float, default=None)
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group.add_option("", "--max-mem", dest="maxMem", metavar="N",
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help="Kill processes with virtual size <= N (MB)",
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action="store", type=float, default=inf)
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group.add_option("", "--min-rss", dest="minRSS", metavar="N",
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help="Kill processes with RSS >= N",
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action="store", type=float, default=None)
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group.add_option("", "--max-rss", dest="maxRSS", metavar="N",
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help="Kill processes with RSS <= N",
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action="store", type=float, default=inf)
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group.add_option("", "--min-time", dest="minTime", metavar="N",
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help="Kill processes with CPU time >= N (seconds)",
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action="store", type=float, default=None)
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group.add_option("", "--max-time", dest="maxTime", metavar="N",
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help="Kill processes with CPU time <= N (seconds)",
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action="store", type=float, default=inf)
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parser.add_option_group(group)
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(opts, args) = parser.parse_args()
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if opts.listSignals:
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items = [(v,k) for k,v in kSignals.items()]
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items.sort()
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for i in range(0, len(items), 4):
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print '\t'.join(['%2d) SIG%s' % (k,v)
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for k,v in items[i:i+4]])
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sys.exit(0)
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# Figure out the signal to use.
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signal = kSignals[opts.signalName]
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signalValueName = str(signal)
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if opts.verbose:
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name = dict((v,k) for k,v in kSignals.items()).get(signal,None)
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if name:
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signalValueName = name
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note('using signal %d (SIG%s)' % (signal, name))
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else:
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note('using signal %d' % signal)
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# Get the pid list to consider.
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pids = set()
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for arg in args:
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try:
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pids.add(int(arg))
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except:
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parser.error('invalid positional argument: %r' % arg)
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filtered = ps = getProcessTable()
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# Apply filters.
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if pids:
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filtered = [p for p in filtered
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if p.pid in pids]
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if opts.execName is not None:
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filtered = [p for p in filtered
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if re_full_match(opts.execName,
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os.path.basename(p.executable))]
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if opts.execPath is not None:
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filtered = [p for p in filtered
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if re_full_match(opts.execPath, p.executable)]
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if opts.userName is not None:
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filtered = [p for p in filtered
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if re_full_match(opts.userName, p.user)]
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filtered = [p for p in filtered
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if opts.minCPU <= p.cpu_percent <= opts.maxCPU]
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filtered = [p for p in filtered
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if opts.minMem <= float(p.vmem_size) / (1<<20) <= opts.maxMem]
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filtered = [p for p in filtered
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if opts.minRSS <= p.rss <= opts.maxRSS]
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filtered = [p for p in filtered
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if opts.minTime <= p.cpu_time <= opts.maxTime]
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if len(filtered) == len(ps):
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if not opts.force and not opts.dryRun:
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error('refusing to kill all processes without --force')
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if not filtered:
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warning('no processes selected')
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for p in filtered:
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if opts.verbose:
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note('kill(%r, %s) # (user=%r, executable=%r, CPU=%2.2f%%, time=%r, vmem=%r, rss=%r)' %
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(p.pid, signalValueName, p.user, p.executable, p.cpu_percent, p.cpu_time, p.vmem_size, p.rss))
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if not opts.dryRun:
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try:
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os.kill(p.pid, signal)
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except OSError:
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if opts.debug:
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raise
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warning('unable to kill PID: %r' % p.pid)
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if __name__ == '__main__':
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main()
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