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Avoid zombies after shell exit

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As documented in libutempter:
"During execution of the privileged process spawned by these
functions, SIGCHLD signal handler will be temporarily set to
the default action."

Thus in case a SIGCHLD has been lost, we send a SIGCHLD to
oneself in order to avoid zombies:
https://savannah.gnu.org/bugs/?25089
This commit is contained in:
Vincent Lefevre
2022-02-17 03:08:26 +02:00
committed by Alexander Naumov
parent 3aa385ea52
commit c56ab476b9
1 changed files with 10 additions and 0 deletions
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10
src/utmp.c
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@@ -349,6 +349,16 @@ static int pututslot(slot_t slot, struct utmpx *u, char *host, Window *win)
utempter_add_record(win->w_ptyfd, host);
else
utempter_remove_record(win->w_ptyfd);
/*
* As documented in libutempter: "During execution of
* the privileged process spawned by these functions,
* SIGCHLD signal handler will be temporarily set to
* the default action." Thus in case a SIGCHLD has
* been lost, we send a SIGCHLD to oneself in order to
* avoid zombies: https://savannah.gnu.org/bugs/?25089
*/
kill(getpid(), SIGCHLD);
return 1; /* pray for success */
}
#else