mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-21 02:06:37 +00:00
1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
118 lines
3.8 KiB
Perl
Executable file
118 lines
3.8 KiB
Perl
Executable file
#!/usr/bin/perl
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#
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# Copyright (c) 1995-1996 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# killall - kill processes by name
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#
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# $FreeBSD$
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$ENV{'PATH'} = '/bin:/usr/bin'; # security
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$procfs = '/proc';
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$signal = 'SIGTERM'; # default signal for kill
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$debug = 0;
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$match = 0; # 0 match exactly program name
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$show = 0; # do nothings
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# see /sys/miscfs/procfs/procfs_status.c
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$PROC_NAME = 0;
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$PROC_EUID = 11;
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$PROC_RUID = 12;
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sub usage {
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$! = 2;
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die "killall [-?|-help] [-d] [-l] [-m] [-s] [-SIGNAL] procname ...\n";
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}
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$id = $<; # real uid of this process / your id
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while ($_ = $ARGV[0], /^-/) {
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shift @ARGV;
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if (/^--$/) { $_ = $ARGV[0]; last }
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elsif (/^-(h|help|\?)$/) { &usage }
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elsif (/^-[dv]$/) { $debug++ }
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elsif (/^-l$/) { exec 'kill', '-l' }
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elsif (/^-m$/) { $match = 1 }
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elsif (/^-s$/) { $show = 1 }
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elsif (/^-([a-z][a-z0-9]+|[0-9]+)$/i) { $signal = $1 }
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elsif (/^-/) { &usage }
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}
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&usage if $#ARGV < 0; # no arguments
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die "Maybe $procfs is not mounted\n" unless -e "$procfs/0/status";
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while ($program = $ARGV[0]) {
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shift @ARGV;
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$thiskill = 0;
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opendir(PROCFS, "$procfs") || die "$procfs $!\n";
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print " PID EUID RUID COMMAND\n" if $debug > 1;
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# quote meta characters
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($programMatch = $program) =~ s/(\W)/\\$1/g;
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foreach (sort{$a <=> $b} grep(/^[0-9]/, readdir(PROCFS))) {
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$status = "$procfs/$_/status";
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$pid = $_;
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next if $pid == $$; # don't kill yourself
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open(STATUS, "$status") || next; # process maybe already terminated
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while(<STATUS>) {
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@proc = split;
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printf "%5d %5d %5d %s\n", $pid, $proc[$PROC_EUID],
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$proc[$PROC_RUID], $proc[$PROC_NAME] if $debug > 1;
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if ( # match program name
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($proc[$PROC_NAME] eq $program ||
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($match && $proc[$PROC_NAME] =~ /$programMatch/oi)
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) &&
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# id test
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($proc[$PROC_EUID] eq $id || # effective uid
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$proc[$PROC_RUID] eq $id || # real uid
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!$id)) # root
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{
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push(@kill, $pid);
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$thiskill++;
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}
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}
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close STATUS;
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}
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closedir PROCFS;
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# nothing found
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warn "No matching processes ``$program''\n" unless $thiskill;
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}
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# nothing found
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exit(1) if $#kill < 0;
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$signal =~ y/a-z/A-Z/; # signal name in upper case
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$signal =~ s/^SIG//; # strip a leading SIG if present
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print "kill -$signal @kill\n" if $debug || $show;
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$cnt = kill ($signal, @kill) unless $show; # kill processes
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exit(0) if $show || $cnt == $#kill + 1;
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exit(1);
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