Adding a copy of memcached to the tree.

[awesomized/libmemcached] / memcached / scripts / start-memcached

diff --git a/memcached/scripts/start-memcached b/memcached/scripts/start-memcached
new file mode 100755 (executable)
index 0000000..ce39fa6
--- /dev/null
+++ b/memcached/scripts/start-memcached
@@ -0,0 +1,128 @@
+#!/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{
+        `rm -f $localpid`;
+    }
+
+}
+
+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);
+
+}