Re: Bug#482346: zsh doesn't always wait for its children (-> zombie)

[Vincent Lefevre <vincent@vinc17.org>]

I've done a "strace -f". The last system call from zsh is:

21344 rt_sigsuspend([] <unfinished ...>

which occurred at about the same time vlc was started. Then, beginning
at the first SIGINT:

21345 --- SIGINT (Interrupt) @ 0 (0) ---
21345 time(NULL)                        = 1211583212
21345 sigreturn()                       = ? (mask now [ILL ABRT BUS FPE USR1 USR2 ALRM TERM CHLD CONT STOP TSTP TTIN URG VTALRM PROF WINCH])
21345 ioctl(7, FIONREAD, [0])           = 0
21345 poll( <unfinished ...>
21348 <... nanosleep resumed> NULL)     = 0
21347 <... nanosleep resumed> NULL)     = 0
21348 nanosleep({0, 50000000},  <unfinished ...>
21347 nanosleep({0, 50000000},  <unfinished ...>
21346 <... nanosleep resumed> NULL)     = 0
[...]
21345 ioctl(7, FIONREAD, [0])           = 0
21345 poll( <unfinished ...>
21347 <... nanosleep resumed> NULL)     = 0
21347 nanosleep({0, 50000000},  <unfinished ...>
21346 <... nanosleep resumed> NULL)     = 0
21346 nanosleep({0, 25000000},  <unfinished ...>
21349 <... nanosleep resumed> NULL)     = 0
21349 nanosleep({0, 100000000},  <unfinished ...>
21348 <... nanosleep resumed> NULL)     = 0
21348 nanosleep({0, 50000000},  <unfinished ...>
21346 <... nanosleep resumed> NULL)     = 0
21346 nanosleep({0, 25000000},  <unfinished ...>
21347 <... nanosleep resumed> NULL)     = 0
21347 nanosleep({0, 50000000},  <unfinished ...>
21346 <... nanosleep resumed> NULL)     = 0
21346 nanosleep({0, 25000000},  <unfinished ...>
21348 <... nanosleep resumed> NULL)     = 0
21348 nanosleep({0, 50000000},  <unfinished ...>
21346 <... nanosleep resumed> NULL)     = 0
21346 nanosleep({0, 25000000},  <unfinished ...>
21345 <... poll resumed> [{fd=5, events=POLLIN}, {fd=7, events=POLLIN}], 2, 99) = ? ERESTART_RESTARTBLOCK (To be restarted)
21345 --- SIGINT (Interrupt) @ 0 (0) ---
21345 time(NULL)                        = 1211583216
21345 rt_sigaction(SIGINT, {SIG_DFL}, {0x10001e9c, [INT], SA_RESTART}, 8) = 0
21345 rt_sigaction(SIGHUP, {SIG_DFL}, {0x10001e9c, [HUP], SA_RESTART}, 8) = 0
21345 rt_sigaction(SIGQUIT, {SIG_DFL}, {0x10001e9c, [QUIT], SA_RESTART}, 8) = 0
21345 rt_sigaction(SIGALRM, {SIG_DFL}, {SIG_IGN}, 8) = 0
21345 rt_sigaction(SIGPIPE, {SIG_DFL}, {SIG_IGN}, 8) = 0
21345 write(2, "user insisted too much, dying ba"..., 36) = 36
21345 rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
21345 tgkill(21345, 21345, SIGABRT)     = 0
21345 --- SIGABRT (Aborted) @ 0 (0) ---
21349 <... nanosleep resumed> 0)        = ? ERESTART_RESTARTBLOCK (To be restarted)
21347 <... nanosleep resumed> 0)        = ? ERESTART_RESTARTBLOCK (To be restarted)
21348 <... nanosleep resumed> 0)        = ? ERESTART_RESTARTBLOCK (To be restarted)
21346 <... nanosleep resumed> 0)        = ? ERESTART_RESTARTBLOCK (To be restarted)

The strace output ends here.

-- 
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon)