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internal/outcome/shim: move signal constants
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The magic numbers hurt readability.

Signed-off-by: Ophestra <cat@gensokyo.uk>
This commit is contained in:
Ophestra
2025-10-30 00:46:23 +09:00
parent 3f9f331501
commit eeb9f98e5b
4 changed files with 33 additions and 17 deletions
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19
internal/outcome/shim-signal.c
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@@ -8,35 +8,32 @@
static pid_t hakurei_shim_param_ppid = -1;
static int hakurei_shim_fd = -1;
static ssize_t hakurei_shim_write(const void *buf, size_t count) {
/* see shim.go for handling of the message */
static inline ssize_t hakurei_shim_write(hakurei_shim_msg msg) {
int savedErrno = errno;
ssize_t ret = write(hakurei_shim_fd, buf, count);
unsigned char buf = (unsigned char)msg;
ssize_t ret = write(hakurei_shim_fd, &buf, 1);
if (ret == -1 && errno != EAGAIN)
exit(EXIT_FAILURE);
errno = savedErrno;
return ret;
}
/* see shim_linux.go for handling of the value */
static void hakurei_shim_sigaction(int sig, siginfo_t *si, void *ucontext) {
if (sig != SIGCONT || si == NULL) {
/* unreachable */
hakurei_shim_write("\2", 1);
hakurei_shim_write(HAKUREI_SHIM_INVALID);
return;
}
if (si->si_pid == hakurei_shim_param_ppid) {
/* monitor requests shim exit */
hakurei_shim_write("\0", 1);
hakurei_shim_write(HAKUREI_SHIM_EXIT_REQUESTED);
return;
}
/* unexpected si_pid */
hakurei_shim_write("\3", 1);
hakurei_shim_write(HAKUREI_SHIM_BAD_PID);
if (getppid() != hakurei_shim_param_ppid)
/* shim orphaned before monitor delivers a signal */
hakurei_shim_write("\1", 1);
hakurei_shim_write(HAKUREI_SHIM_ORPHAN);
}
void hakurei_shim_setup_cont_signal(pid_t ppid, int fd) {