2 # NEPI, a framework to manage network experiments
3 # Copyright (C) 2013 INRIA
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
20 from nepi.util.sshfuncs import ProcStatus, STDOUT
30 Executes a local command, returns ((stdout,stderr),process)
34 for envkey, envval in env.iteritems():
35 export += '%s=%s ' % (envkey, envval)
36 command = "%s %s" % (export, command)
39 command = "sudo %s" % command
41 command = "su %s ; %s " % (user, command)
44 p = subprocess.Popen(command,
45 stdout = subprocess.PIPE,
46 stderr = subprocess.PIPE,
49 out, err = p.communicate()
52 def lcopy(source, dest, recursive = False):
54 Copies from/to localy.
58 print "scp", source, dest
64 if isinstance(dest, str):
65 dest = dest.split(";")
67 if isinstance(src, str):
74 p = subprocess.Popen(command,
75 stdout=subprocess.PIPE,
76 stderr=subprocess.PIPE)
78 out, err = p.communicate()
79 return ((out, err), proc)
81 def lspawn(command, pidfile,
90 Spawn a local command such that it will continue working asynchronously.
93 command: the command to run - it should be a single line.
95 pidfile: path of a (ideally unique to this task) pidfile for tracking the process.
97 stdout: path of a file to redirect standard output to - must be a string.
99 stderr: path of a file to redirect standard error to - string or the special STDOUT value
100 to redirect to the same file stdout was redirected to. Defaults to STDOUT.
101 stdin: path of a file with input to be piped into the command's standard input
103 home: path of a folder to use as working directory - should exist, unless you specify create_home
105 create_home: if True, the home folder will be created first with mkdir -p
107 sudo: whether the command needs to be executed as root
110 (stdout, stderr), process
112 Of the spawning process, which only captures errors at spawning time.
113 Usually only useful for diagnostics.
115 # Start process in a "daemonized" way, using nohup and heavy
116 # stdin/out redirection to avoid connection issues
120 stderr = ' ' + stderr
122 daemon_command = '{ { %(command)s > %(stdout)s 2>%(stderr)s < %(stdin)s & } ; echo $! 1 > %(pidfile)s ; }' % {
124 'pidfile' : shell_escape(pidfile),
130 cmd = "%(create)s%(gohome)s rm -f %(pidfile)s ; %(sudo)s nohup bash -c %(command)s " % {
131 'command' : shell_escape(daemon_command),
132 'sudo' : 'sudo -S' if sudo else '',
133 'pidfile' : shell_escape(pidfile),
134 'gohome' : 'cd %s ; ' % (shell_escape(home),) if home else '',
135 'create' : 'mkdir -p %s ; ' % (shell_escape(home),) if create_home else '',
138 (out,err),proc = lexec(cmd)
141 raise RuntimeError, "Failed to set up application on host %s: %s %s" % (host, out,err,)
143 return (out,err),proc
145 def lgetpid(pidfile):
147 Check the pidfile of a process spawned with remote_spawn.
150 pidfile: the pidfile passed to remote_span
154 A (pid, ppid) tuple useful for calling remote_status and remote_kill,
155 or None if the pidfile isn't valid yet (maybe the process is still starting).
158 (out,err),proc = lexec("cat %s" % pidfile )
165 return map(int,out.strip().split(' ',1))
167 # Ignore, many ways to fail that don't matter that much
170 def lstatus(pid, ppid):
172 Check the status of a process spawned with remote_spawn.
175 pid/ppid: pid and parent-pid of the spawned process. See remote_check_pid
179 One of NOT_STARTED, RUNNING, FINISHED
182 (out,err),proc = lexec(
183 # Check only by pid. pid+ppid does not always work (especially with sudo)
184 " (( ps --pid %(pid)d -o pid | grep -c %(pid)d && echo 'wait') || echo 'done' ) | tail -n 1" % {
190 return ProcStatus.NOT_STARTED
194 status = (out.strip() == 'wait')
196 return ProcStatus.NOT_STARTED
197 return ProcStatus.RUNNING if status else ProcStatus.FINISHED
200 def lkill(pid, ppid, sudo = False):
202 Kill a process spawned with lspawn.
204 First tries a SIGTERM, and if the process does not end in 10 seconds,
208 pid/ppid: pid and parent-pid of the spawned process. See remote_check_pid
210 sudo: whether the command was run with sudo - careful killing like this.
214 Nothing, should have killed the process
217 subkill = "$(ps --ppid %(pid)d -o pid h)" % { 'pid' : pid }
219 SUBKILL="%(subkill)s" ;
220 %(sudo)s kill -- -%(pid)d $SUBKILL || /bin/true
221 %(sudo)s kill %(pid)d $SUBKILL || /bin/true
222 for x in 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 ; do
224 if [ `ps --pid %(pid)d -o pid | grep -c %(pid)d` == '0' ]; then
227 %(sudo)s kill -- -%(pid)d $SUBKILL || /bin/true
228 %(sudo)s kill %(pid)d $SUBKILL || /bin/true
232 if [ `ps --pid %(pid)d -o pid | grep -c %(pid)d` != '0' ]; then
233 %(sudo)s kill -9 -- -%(pid)d $SUBKILL || /bin/true
234 %(sudo)s kill -9 %(pid)d $SUBKILL || /bin/true
238 cmd = "( %s ) >/dev/null 2>/dev/null </dev/null &" % (cmd,)
240 (out,err),proc = lexec(
244 'sudo' : 'sudo -S' if sudo else '',