qdo revision 2665 
1#! /usr/bin/env python
2
3# Copyright (c) 2004-2005 The Regents of The University of Michigan
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
8# met: redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer;
10# redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution;
13# neither the name of the copyright holders nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28#
29# Authors: Steve Reinhardt
30
31import sys
32import os
33import re
34import time
35import optparse
36
37import pexpect
38
39progname = os.path.basename(sys.argv[0])
40
41usage = "%prog [options] command [command arguments]"
42optparser = optparse.OptionParser(usage=usage)
43optparser.allow_interspersed_args=False
44optparser.add_option('-e', dest='stderr_file',
45                     help='command stderr output file')
46optparser.add_option('-o', dest='stdout_file',
47                     help='command stdout output file')
48optparser.add_option('-l', dest='save_log', action='store_true',
49                     help='save qsub output log file')
50optparser.add_option('-N', dest='job_name',
51                     help='qsub job name')
52optparser.add_option('-q', dest='dest_queue',
53                     help='qsub destination queue')
54optparser.add_option('--qwait', dest='qsub_timeout', type='int',
55                     help='qsub queue wait timeout', default=30*60)
56optparser.add_option('-t', dest='cmd_timeout', type='int',
57                     help='command execution timeout', default=600*60)
58
59(options, cmd) = optparser.parse_args()
60
61if cmd == []:
62    print >>sys.stderr, "%s: missing command" % progname
63    sys.exit(1)
64
65# If we want to do this, need to add check here to make sure cmd[0] is
66# a valid PBS job name, else qsub will die on us.
67#
68#if not options.job_name:
69#    options.job_name = cmd[0]
70
71cwd = os.getcwd()
72
73# Deal with systems where /n is a symlink to /.automount
74if cwd.startswith('/.automount/'):
75    cwd = cwd.replace('/.automount/', '/n/', 1)
76
77if not cwd.startswith('/n/poolfs/'):
78    print >>sys.stderr, "Error: current directory must be under /n/poolfs."
79    sys.exit(1)
80
81# The Shell class wraps pexpect.spawn with some handy functions that
82# assume the thing on the other end is a Bourne/bash shell.
83class Shell(pexpect.spawn):
84    # Regexp to match the shell prompt.  We change the prompt to
85    # something fixed and distinctive to make it easier to match
86    # reliably.
87    prompt_re = re.compile('qdo\$ ')
88
89    def __init__(self, cmd):
90        # initialize base pexpect.spawn object
91	try:
92            pexpect.spawn.__init__(self, cmd)
93	except pexpect.ExceptionPexpect, exc:
94	    print "%s:" % progname, exc
95	    sys.exit(1)
96        # full_output accumulates the full output of the session
97        self.full_output = ""
98        self.quick_timeout = 15
99        # wait for a prompt, then change it
100        try:
101            self.expect('\$ ', options.qsub_timeout)
102        except pexpect.TIMEOUT:
103            print >>sys.stderr, "%s: qsub timed out." % progname
104            self.kill(9)
105            self.close(wait=True)
106            sys.exit(1)
107        self.do_command('unset PROMPT_COMMAND; PS1="qdo$ "')
108
109    # version of expect that updates full_output too
110    def expect(self, regexp, timeout = -1):
111        pexpect.spawn.expect(self, regexp, timeout)
112        self.full_output += self.before + self.after
113
114    # Just issue a command and wait for the next prompt.
115    # Returns a string containing the output of the command.
116    def do_bare_command(self, cmd, timeout = -1):
117        global full_output
118        self.sendline(cmd)
119        # read back the echo of the command
120        self.readline()
121        # wait for the next prompt
122        self.expect(self.prompt_re, timeout)
123        output = self.before.rstrip()
124        return output
125
126    # Issue a command, then query its exit status.
127    # Returns a (string, int) tuple with the command output and the status.
128    def do_command(self, cmd, timeout = -1):
129        # do the command itself
130        output = self.do_bare_command(cmd, timeout)
131        # collect status
132        status = int(self.do_bare_command("echo $?", self.quick_timeout))
133        return (output, status)
134
135    # Check to see if the given directory exists.
136    def dir_exists(self, dirname):
137        (output, status) = shell.do_command('[ -d %s ]' % dirname,
138                                            self.quick_timeout)
139        return status == 0
140
141
142# Spawn the interactive pool job.
143
144# Hack to do link on poolfs... disabled for now since
145# compiler/linker/library versioning problems between poolfs and
146# nodes.  May never work since poolfs is x86-64 and nodes are 32-bit.
147if False and len(cmd) > 50:
148    shell_cmd = 'ssh -t poolfs /bin/sh -l'
149    print "%s: running %s on poolfs" % (progname, cmd[0])
150else:
151    shell_cmd = 'qsub -I -S /bin/sh'
152    if options.job_name:
153        shell_cmd += ' -N "%s"' % options.job_name
154    if options.dest_queue:
155        shell_cmd += ' -q ' + options.dest_queue
156
157shell = Shell(shell_cmd)
158
159try:
160    # chdir to cwd
161    (output, status) = shell.do_command('cd ' + cwd)
162
163    if status != 0:
164        raise OSError, "Can't chdir to %s" % cwd
165
166    # wacky hack: sometimes scons will create an output directory then
167    # fork a job to generate files in that directory, and the job will
168    # get run before the directory creation propagates through NFS.
169    # This hack looks for a '-o' option indicating an output file and
170    # waits for the corresponding directory to appear if necessary.
171    try:
172        if 'cc' in cmd[0] or 'g++' in cmd[0]:
173            output_dir = os.path.dirname(cmd[cmd.index('-o')+1])
174        elif 'm5' in cmd[0]:
175            output_dir = cmd[cmd.index('-d')+1]
176        else:
177            output_dir = None
178    except (ValueError, IndexError):
179        # no big deal if there's no '-o'/'-d' or if it's the final argument
180        output_dir = None
181
182    if output_dir:
183        secs_waited = 0
184        while not shell.dir_exists(output_dir) and secs_waited < 90:
185            time.sleep(5)
186            secs_waited += 5
187        if secs_waited > 30:
188            print "waited", secs_waited, "seconds for", output_dir
189
190    # run command
191    if options.stdout_file:
192        cmd += ['>', options.stdout_file]
193    if options.stderr_file:
194        cmd += ['2>', options.stderr_file]
195    try:
196        (output, status) = shell.do_command(' '.join(cmd), options.cmd_timeout)
197    except pexpect.TIMEOUT:
198            print >>sys.stderr, "%s: command timed out after %d seconds." \
199                  % (progname, options.cmd_timeout)
200            shell.sendline('~.') # qsub/ssh termination escape sequence
201            shell.close(wait=True)
202            status = 3
203    if output:
204        print output
205
206finally:
207    # end job
208    if shell.isalive():
209        shell.sendline('exit')
210        shell.expect('qsub: job .* completed\r\n')
211        shell.close(wait=True)
212
213    # if there was an error, log the output even if not requested
214    if status != 0 or options.save_log:
215        log = file('qdo-log.' + str(os.getpid()), 'w')
216        log.write(shell.full_output)
217        log.close()
218
219del shell
220
221sys.exit(status)
222