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waitpid: support for process group waits

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Matheus
2026-04-14 21:45:48 -03:00
parent 3399c4570c
commit 0f69e2bf2e
1 changed files with 12 additions and 10 deletions
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kernel-src/sys/syscalls/waitpid.c
+12 -10
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@@ -3,6 +3,7 @@
#include <arch/cpu.h>
#include <errno.h>
#include <logging.h>
#include <kernel/jobctl.h>
#define __WALL 0x40000000
#define WNOHANG 1
@@ -10,23 +11,20 @@
#define WCONTINUED 8
#define KNOWN_FLAGS (WNOHANG | WSTOPPED | WCONTINUED | __WALL)
// TODO use events here
syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int options) {
syscallret_t ret = {
.ret = -1
};
bool check_pgid = false;
if (options & ~KNOWN_FLAGS)
printf("waitpid: unknown %x\n", options);
if (pid == 0) {
printf("waitpid: pid 0 is a stub, falling back to -1\n")
pid = -1;
}
if (pid < -1) {
printf("waitpid: unhandled pid %d\n", pid);
ret.errno = EOPNOTSUPP;
return ret;
if (pid < -1 || pid == 0) {
check_pgid = true;
pid = -pid;
}
thread_t *thread = current_thread();
@@ -70,7 +68,11 @@ syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int opt
continue;
}
if ((pid > 0 && iterator->pid == pid) || pid == -1) {
if ((pid > 0 && iterator->pid == pid) ||
pid == -1 ||
(check_pgid && ((pid == 0 &&
jobctl_getpgid(proc) == jobctl_getpgid(iterator)) ||
jobctl_getpgid(iterator) == pid))) {
desired = iterator;
if (iterator->signals.continueunwaited && (options & WCONTINUED)) {
iterator->signals.continueunwaited = false;