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Plugin context check: check termios settings

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This commit is contained in:
Olof hagsand 2021-10-21 15:44:04 +02:00
parent 7d7024d114
commit 5d29d8aff0
6 changed files with 119 additions and 17 deletions
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52
lib/src/clixon_sig.c
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@ -121,6 +121,58 @@ clicon_signal_unblock(int sig)
sigprocmask(SIG_UNBLOCK, &set, NULL);
}
/*! Save complete signal context
*/
int
clixon_signal_save(sigset_t *sigset,
struct sigaction sigaction_vec[32])
{
int retval = -1;
int i;
if (sigprocmask(0, NULL, sigset) < 0){
clicon_err(OE_UNIX, errno, "sigprocmask");
goto done;
}
for (i=1; i<32; i++){
if (sigaction(i, NULL, &sigaction_vec[i]) < 0){
clicon_err(OE_UNIX, errno, "sigaction");
goto done;
}
}
retval = 0;
done:
return retval;
}
/*! Restore complete signal context
*
* Note: sigaction may not restore SIGKILL or SIGSTOP, which cannot be caught or ignored.
*/
int
clixon_signal_restore(sigset_t *sigset,
struct sigaction sigaction_vec[32])
{
int retval = -1;
int i;
if (sigprocmask(0, sigset, NULL) < 0){
clicon_err(OE_UNIX, errno, "sigprocmask");
goto done;
}
for (i=1; i<32; i++){
if (i == SIGKILL || i == SIGSTOP)
continue;
if (sigaction(i, &sigaction_vec[i], NULL) < 0){
clicon_err(OE_UNIX, errno, "sigaction");
goto done;
}
}
retval = 0;
done:
return retval;
}
/*! Read pidfile and return pid using file descriptor
*
* @param[in] pidfile Name of pidfile