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Refactoring sigchld ref. #156 (#159)

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Stein Gunnar Bakkeby 2024-11-25 20:48:52 +01:00 • committed by GitHub
parent c4c5113fbd
commit 4dec55eead
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4 changed files with 21 additions and 49 deletions
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54
st.c
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@ -820,40 +820,19 @@ sigchld(int a)
int stat;
pid_t p;
#if EXTERNALPIPEIN_PATCH && EXTERNALPIPE_PATCH
if ((p = waitpid((extpipeactive ? -1 : pid), &stat, WNOHANG)) < 0)
#else
if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
#endif // EXTERNALPIPEIN_PATCH
die("waiting for pid %hd failed: %s\n", pid, strerror(errno));
while ((p = waitpid(-1, &stat, WNOHANG)) > 0) {
if (p == pid) {
#if EXTERNALPIPEIN_PATCH && EXTERNALPIPE_PATCH
close(csdfd);
#endif // EXTERNALPIPEIN_PATCH
#if EXTERNALPIPE_PATCH
if (pid != p) {
if (!extpipeactive)
return;
if (p == 0 && wait(&stat) < 0)
die("wait: %s\n", strerror(errno));
/* reinstall sigchld handler */
signal(SIGCHLD, sigchld);
extpipeactive = 0;
return;
if (WIFEXITED(stat) && WEXITSTATUS(stat))
die("child exited with status %d\n", WEXITSTATUS(stat));
else if (WIFSIGNALED(stat))
die("child terminated due to signal %d\n", WTERMSIG(stat));
_exit(0);
}
}
#else
if (pid != p)
return;
#endif // EXTERNALPIPE_PATCH
#if EXTERNALPIPEIN_PATCH && EXTERNALPIPE_PATCH
close(csdfd);
#endif // EXTERNALPIPEIN_PATCH
if (WIFEXITED(stat) && WEXITSTATUS(stat))
die("child exited with status %d\n", WEXITSTATUS(stat));
else if (WIFSIGNALED(stat))
die("child terminated due to signal %d\n", WTERMSIG(stat));
_exit(0);
}
void
@ -884,9 +863,7 @@ int
ttynew(const char *line, char *cmd, const char *out, char **args)
{
int m, s;
#if EXTERNALPIPEIN_PATCH && EXTERNALPIPE_PATCH
struct sigaction sa;
#endif // EXTERNALPIPEIN_PATCH
if (out) {
term.mode |= MODE_PRINT;
@ -944,15 +921,14 @@ ttynew(const char *line, char *cmd, const char *out, char **args)
#if EXTERNALPIPEIN_PATCH && EXTERNALPIPE_PATCH
csdfd = s;
cmdfd = m;
#else
close(s);
cmdfd = m;
#endif // EXTERNALPIPEIN_PATCH
memset(&sa, 0, sizeof(sa));
sigemptyset(&sa.sa_mask);
sa.sa_handler = sigchld;
sigaction(SIGCHLD, &sa, NULL);
#else
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
#endif // EXTERNALPIPEIN_PATCH
break;
}
return cmdfd;