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1 #!/usr/bin/perl -w
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2
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3 # start-memcached
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4 # 2003/2004 - Jay Bonci <jaybonci@debian.org>
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5 # This script handles the parsing of the /etc/memcached.conf file
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6 # and was originally created for the Debian distribution.
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7 # Anyone may use this little script under the same terms as
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8 # memcached itself.
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9
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10 use strict;
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11
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12 if($> != 0 and $< != 0)
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13 {
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14 print STDERR "Only root wants to run start-memcached.\n";
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15 exit;
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16 }
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17
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18 my $params; my $etchandle; my $etcfile = "/etc/memcached.conf";
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19
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20 # This script assumes that memcached is located at /usr/bin/memcached, and
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21 # that the pidfile is writable at /var/run/memcached.pid
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22
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23 my $memcached = "/usr/bin/memcached";
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24 my $pidfile = "/var/run/memcached.pid";
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25
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26 # If we don't get a valid logfile parameter in the /etc/memcached.conf file,
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27 # we'll just throw away all of our in-daemon output. We need to re-tie it so
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28 # that non-bash shells will not hang on logout. Thanks to Michael Renner for
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29 # the tip
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30 my $fd_reopened = "/dev/null";
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31
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32 sub handle_logfile
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33 {
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34 my ($logfile) = @_;
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35 $fd_reopened = $logfile;
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36 }
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37
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38 sub reopen_logfile
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39 {
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40 my ($logfile) = @_;
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41
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42 open *STDERR, ">>$logfile";
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43 open *STDOUT, ">>$logfile";
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44 open *STDIN, ">>/dev/null";
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45 $fd_reopened = $logfile;
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46 }
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47
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48 # This is set up in place here to support other non -[a-z] directives
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49
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50 my $conf_directives = {
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51 "logfile" => \&handle_logfile,
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52 };
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53
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54 if(open $etchandle, $etcfile)
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55 {
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56 foreach my $line (<$etchandle>)
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57 {
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58 $line ||= "";
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59 $line =~ s/\#.*//g;
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60 $line =~ s/\s+$//g;
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61 $line =~ s/^\s+//g;
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62 next unless $line;
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63 next if $line =~ /^\-[dh]/;
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64
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65 if($line =~ /^[^\-]/)
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66 {
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67 my ($directive, $arg) = $line =~ /^(.*?)\s+(.*)/;
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68 $conf_directives->{$directive}->($arg);
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69 next;
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70 }
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71
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72 push @$params, $line;
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73 }
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74
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75 }else{
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76 $params = [];
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77 }
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78
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79 push @$params, "-u root" unless(grep "-u", @$params);
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80 $params = join " ", @$params;
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81
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82 if(-e $pidfile)
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83 {
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84 open PIDHANDLE, "$pidfile";
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85 my $localpid = <PIDHANDLE>;
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86 close PIDHANDLE;
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87
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88 chomp $localpid;
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89 if(-d "/proc/$localpid")
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90 {
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91 print STDERR "memcached is already running.\n";
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92 exit;
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93 }else{
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94 `rm -f $localpid`;
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95 }
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96
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97 }
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98
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99 my $pid = fork();
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100
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101 if($pid == 0)
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102 {
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103 reopen_logfile($fd_reopened);
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104 exec "$memcached $params";
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105 exit(0);
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106
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107 }else{
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108 if(open PIDHANDLE,">$pidfile")
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109 {
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110 print PIDHANDLE $pid;
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111 close PIDHANDLE;
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112 }else{
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113
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114 print STDERR "Can't write pidfile to $pidfile.\n";
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115 }
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116 }
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117
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