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#!/usr/bin/perl -w # start-memcached # 2003/2004 - Jay Bonci <jaybonci@debian.org> # This script handles the parsing of the /etc/memcached.conf file # and was originally created for the Debian distribution. # Anyone may use this little script under the same terms as # memcached itself. use POSIX qw(setsid); use strict; if($> != 0 and $< != 0) { print STDERR "Only root wants to run start-memcached.\n"; exit; } my $params; my $etchandle; my $etcfile = "/etc/memcached.conf"; # This script assumes that memcached is located at /usr/bin/memcached, and # that the pidfile is writable at /var/run/memcached.pid my $memcached = "/usr/bin/memcached"; my $pidfile = "/var/run/memcached.pid"; if (scalar(@ARGV) == 2) { $etcfile = shift(@ARGV); $pidfile = shift(@ARGV); } # If we don't get a valid logfile parameter in the /etc/memcached.conf file, # we'll just throw away all of our in-daemon output. We need to re-tie it so # that non-bash shells will not hang on logout. Thanks to Michael Renner for # the tip my $fd_reopened = "/dev/null"; sub handle_logfile { my ($logfile) = @_; $fd_reopened = $logfile; } sub reopen_logfile { my ($logfile) = @_; open *STDERR, ">>$logfile"; open *STDOUT, ">>$logfile"; open *STDIN, ">>/dev/null"; $fd_reopened = $logfile; } # This is set up in place here to support other non -[a-z] directives my $conf_directives = { "logfile" => \&handle_logfile, }; if(open $etchandle, $etcfile) { foreach my $line (<$etchandle>) { $line ||= ""; $line =~ s/(?<!\\)\#[^\#]*//g; $line =~ s/\s+$//g; $line =~ s/^\s+//g; next unless $line; next if $line =~ /^\-[dh]/; if($line =~ /^[^\-]/) { my ($directive, $arg) = $line =~ /^(.*?)\s+(.*)/; $conf_directives->{$directive}->($arg); next; } push @$params, $line; } }else{ $params = []; } push @$params, "-u root" unless(grep "-u", @$params); $params = join " ", @$params; if(-e $pidfile) { open PIDHANDLE, "$pidfile"; my $localpid = <PIDHANDLE>; close PIDHANDLE; chomp $localpid; if(-d "/proc/$localpid") { print STDERR "memcached is already running.\n"; exit; }else{ unlink $pidfile; } } my $pid = fork(); if($pid == 0) { # setsid makes us the session leader setsid(); reopen_logfile($fd_reopened); # must fork again now that tty is closed $pid = fork(); if ($pid) { if(open PIDHANDLE,">$pidfile") { print PIDHANDLE $pid; close PIDHANDLE; }else{ print STDERR "Can't write pidfile to $pidfile.\n"; } exit(0); } exec "$memcached $params"; exit(0); }
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