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spawn: call setsid() in child process

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This commit is contained in:
Daniel Eklöf 2021-02-25 21:09:59 +01:00
parent 8365fde980
commit 4e57711012
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GPG key ID: 5BBD4992C116573F
1 changed files with 13 additions and 9 deletions
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22
spawn.c
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@ -35,15 +35,14 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
/* Child */
close(pipe_fds[0]);
if (setsid() < 0)
goto child_err;
/* Clear signal mask */
sigset_t mask;
sigemptyset(&mask);
if (sigprocmask(SIG_SETMASK, &mask, NULL) < 0) {
const int errno_copy = errno;
LOG_ERRNO("failed to restore signals");
(void)!write(pipe_fds[1], &errno_copy, sizeof(errno_copy));
_exit(errno_copy);
}
if (sigprocmask(SIG_SETMASK, &mask, NULL) < 0)
goto child_err;
bool close_stderr = stderr_fd >= 0;
bool close_stdout = stdout_fd >= 0 && stdout_fd != stderr_fd;
@ -58,12 +57,17 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
(cwd != NULL && chdir(cwd) < 0) ||
execvp(argv[0], argv) < 0)
{
const int errno_copy = errno;
(void)!write(pipe_fds[1], &errno_copy, sizeof(errno_copy));
_exit(errno_copy);
goto child_err;
}
xassert(false);
_exit(errno);
child_err:
;
const int errno_copy = errno;
(void)!write(pipe_fds[1], &errno_copy, sizeof(errno_copy));
_exit(errno_copy);
}
/* Parent */