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execute: invoke sigwait() in a loop when waiting for PAM parent, to avoid spurious wake-ups

This commit is contained in:
Lennart Poettering 2011-06-30 04:15:39 +02:00
parent 0f1df8e169
commit 3dead8d925
1 changed files with 12 additions and 5 deletions
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17
src/execute.c
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@ -843,7 +843,7 @@ static int setup_pam(
/* This string must fit in 10 chars (i.e. the length
* of "/sbin/init") */
rename_process("sd:pam");
rename_process("sd(PAM)");
/* Make sure we don't keep open the passed fds in this
child. We assume that otherwise only those fds are
@ -861,13 +861,20 @@ static int setup_pam(
/* Check if our parent process might already have
* died? */
if (getppid() == parent_pid) {
if (sigwait(&ss, &sig) < 0)
goto child_finish;
for (;;) {
if (sigwait(&ss, &sig) < 0) {
if (errno == EINTR)
continue;
assert(sig == SIGTERM);
goto child_finish;
}
assert(sig == SIGTERM);
break;
}
}
/* Only if our parent died we'll end the session */
/* If our parent died we'll end the session */
if (getppid() != parent_pid)
if ((pam_code = pam_close_session(handle, PAM_DATA_SILENT)) != PAM_SUCCESS)
goto child_finish;