7f5971058a
I frequency use pidof command with strace system call tracer.
strace can trace MULTIPLE processes specified with "-p $PID"
arguments like:
strace -p 1 -p 1030 -p 3043
Sometimes I want to do as following
strace -p $(pidof httpd)
However, above command line doesn't work because -p option
is needed for specifying a pid. pidof uses a whitespace as
a separator. For passing the output to strace, the separator
should be replaced with ' -p '.
This maybe not a special to my use case.
This commit introduces -S option that allows a user to specify a
separator the one wants.
$ ./pidof bash
./pidof bash
24624 18790 12786 11898 11546 10766 7654 5095
$ ./pidof -S ',' bash
./pidof -S ',' bash
24624,18790,12786,11898,11546,10766,7654,5095
$ ./pidof -S '-p ' bash
./pidof -S '-p ' bash
24624-p 18790-p 12786-p 11898-p 11546-p 10766-p 7654-p 5095
$ ./pidof -S ' -p ' bash
./pidof -S ' -p ' bash
24624 -p 18790 -p 12786 -p 11898 -p 11546 -p 10766 -p 7654 -p 5095
$ strace -p $(./pidof -S ' -p ' bash)
strace -p $(./pidof -S ' -p ' bash)
strace: Process 24624 attached
strace: Process 18790 attached
strace: Process 12786 attached
...
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
68 lines
2.2 KiB
Groff
68 lines
2.2 KiB
Groff
'\" -*- coding: UTF-8 -*-
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.\" Copyright (C) 1998 Miquel van Smoorenburg.
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.\"
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.\" This program is free software; you can redistribute it and/or modify
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.\" it under the terms of the GNU General Public License as published by
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.\" the Free Software Foundation; either version 2 of the License, or
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.\" (at your option) any later version.
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.\"
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.\" This program is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public License
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.\" along with this program; if not, write to the Free Software
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.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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.\"
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.TH PIDOF 1 "24 Jul 2013" "" "User Commands"
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.SH NAME
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pidof -- find the process ID of a running program.
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.SH SYNOPSIS
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.B pidof
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.RB [ \-s ]
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.RB [ \-c ]
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.RB [ \-x ]
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.RB [ \-o
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.IR omitpid[,omitpid..] ]
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.RB [ \-o
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.IR omitpid[,omitpid..].. ]
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.RB [ \-S
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.IR separator ]
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.B program
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.RB [ program.. ]
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.SH DESCRIPTION
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.B Pidof
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finds the process id's (pids) of the named programs. It prints those
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id's on the standard output.
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.SH OPTIONS
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.IP \-s
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Single shot - this instructs the program to only return one \fIpid\fP.
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.IP \-c
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Only return process ids that are running with the same root directory.
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This option is ignored for non-root users, as they will be unable to check
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the current root directory of processes they do not own.
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.IP \-x
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Scripts too - this causes the program to also return process id's of
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shells running the named scripts.
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.IP "-o \fIomitpid\fP"
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Tells \fIpidof\fP to omit processes with that process id. The special
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pid \fB%PPID\fP can be used to name the parent process of the \fIpidof\fP
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program, in other words the calling shell or shell script.
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.IP "-S \fIseparator\fP"
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Use \fIseparator\fP as a separator put between pids. Used only when
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more than one pids are printed for the program.
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.SH "EXIT STATUS"
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.TP
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.B 0
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At least one program was found with the requested name.
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.TP
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.B 1
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No program was found with the requested name.
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.SH SEE ALSO
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.BR pgrep (1),
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.BR pkill (1)
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.SH AUTHOR
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Jaromir Capik <jcapik@redhat.com>
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