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slave/spawn: restore SIGHUP handler after fork(), before exec()

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Foot installs a SIG_IGN handler for SIGHUP. Ignored signals are
inherited in sub-processes. Thus, we need to restore it to SIG_DFL
before exec:ing.
This commit is contained in:
Daniel Eklöf 2021-06-02 17:48:57 +02:00
parent 2f7e5aed40
commit a72b2688bd
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3 changed files with 9 additions and 2 deletions
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4
spawn.c
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@ -44,6 +44,10 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
if (sigprocmask(SIG_SETMASK, &mask, NULL) < 0)
goto child_err;
/* Restore ignored (SIG_IGN) signals */
if (sigaction(SIGHUP, &(struct sigaction){.sa_handler = SIG_DFL}, NULL) < 0)
goto child_err;
bool close_stderr = stderr_fd >= 0;
bool close_stdout = stdout_fd >= 0 && stdout_fd != stderr_fd;
bool close_stdin = stdin_fd >= 0 && stdin_fd != stdout_fd && stdin_fd != stderr_fd;