draft as wrapper to waitid()

1 files changed, 36 insertions, 2 deletions

diff --git a/src/sys/wait/waitpid.c b/src/sys/wait/waitpid.c
index ef196cc1..c3892ff0 100644
--- a/src/sys/wait/waitpid.c
+++ b/src/sys/wait/waitpid.c
@@ -1,11 +1,45 @@
 #include "sys/types.h"
 #include <sys/wait.h>
+#include "signal.h"
+#include "unistd.h"
+#include "_syscall.h"
+
+#ifndef P_PID
+#include "signal/union_sigval.c"
+#include "signal/siginfo_t.c"
+#include "idtype_t.c"
+#include "P_PID.c"
+#include "P_PGID.c"
+#include "P_ALL.c"
+#define getpgid(_pid) __syscall(__syscall_lookup(getpgid), _pid, 0, 0, 0, 0, 0)
+#define waitid(_type, _id, _si, _opt) __syscall(__syscall_lookup(waitid), _type, _id, _si, _opt, 0, 0)
+#endif
 
 pid_t waitpid(pid_t pid, int *stat_loc, int options)
 {
-	(void)pid; (void)stat_loc; (void)options;
-	return 0;
+	/* TODO: handle WUNTRACED, is not recognized by waitid() */
+
+	siginfo_t si = { 0 };
+	idtype_t idt = P_PID;
+	int ret = -1;
+
+	if (pid == (pid_t)-1) {
+		idt = P_ALL;
+	} else if (pid == 0) {
+		idt = P_PGID;
+		pid = getpgid(0);
+	} else if (pid < (pid_t)-1) {
+		idt = P_PGID;
+		pid = -pid;
+	}
+
+	ret = waitid(idt, pid, &si, options);
+	if (stat_loc) {
+		*stat_loc = si.si_status;
+	}
+	return ret;
 }
+
 /*
 POSIX(1)
 */