Hello all,
It seems that freshclam can be hung if it receives a HUP shortly after
receiving an alrm (that is, when waking up to check for a new version).
The last several lines of an strace reveal:
rt_sigaction(SIGALRM, {0x804ac70, [],
SA_RESTORER|SA_STACK|SA_RESTART|SA_INTERRUPT|SA_ONESHOT|0x3fff608, 0x8050036},
{SIG_DFL}, 8) = 0
rt_sigaction(SIGUSR1, {0x804ac70, [],
SA_RESTORER|SA_STACK|SA_RESTART|SA_INTERRUPT|SA_ONESHOT|0x3fff608, 0x8050036},
{SIG_DFL}, 8) = 0
time([1107999334]) = 1107999334
alarm(7200) = 0
pause() = ? ERESTARTNOHAND (To be restarted)
--- SIGALRM (Alarm clock) @ 0 (0) ---
write(3, "Received signal 14, wake up\n", 28) = 28
--- SIGHUP (Hangup) @ 0 (0) ---
futex(0x8051a6c, FUTEX_WAIT, 2, NULL <unfinished ...>
And there it hangs. The last thing in the logfile is
--------------------------------------
Received signal 1, re-opening log file
In other words, it never logs the wake up line. To reproduce, run
freshclam as a daemon, let it get to the pause(), and then do:
PID=`cat /var/run/clamav/freshclam.pid`; kill -ALRM $PID ; kill -HUP $PID
Thanks, and let me know of I can be of any assistance,
--
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| Stephen Gran | Ever get the feeling that the world's |
| [EMAIL PROTECTED] | on tape and one of the reels is |
| http://www.lobefin.net/~steve | missing? -- Rich Little |
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