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