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comparison plugins/mod_posix.lua @ 3340:0769cc5f34b6

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mod_posix: Truncate the pidfile before writing to ensure that we never overwrite with a PID shorter than the previous, and end with an invalid PID in the file.
author Brian Cully <bjc@junctionnetworks.com>
date Fri, 09 Jul 2010 01:16:09 +0100
parents 0c7beabfed5b
children a8a3e662fea7
comparison
equal deleted inserted replaced
3339:7893055e54d1 3340:0769cc5f34b6
93 local other_pid = pidfile_handle:read("*a"); 93 local other_pid = pidfile_handle:read("*a");
94 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid); 94 module:log("error", "Another Prosody instance seems to be running with PID %s, quitting", other_pid);
95 pidfile_handle = nil; 95 pidfile_handle = nil;
96 prosody.shutdown("Prosody already running"); 96 prosody.shutdown("Prosody already running");
97 else 97 else
98 pidfile_handle, err = io.open(pidfile, "w+");
99 if not pidfile_handle then
100 module:log("error", "Couldn't write pidfile at %s; %s", pidfile, err);
101 prosody.shutdown("Couldn't write pidfile");
102 end
98 pidfile_handle:write(tostring(pposix.getpid())); 103 pidfile_handle:write(tostring(pposix.getpid()));
99 pidfile_handle:flush(); 104 pidfile_handle:flush();
100 end 105 end
101 end 106 end
102 end 107 end