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Diffstat (limited to 'libc/sysdeps/linux/common/waitid.c')
-rw-r--r--libc/sysdeps/linux/common/waitid.c58
1 files changed, 17 insertions, 41 deletions
diff --git a/libc/sysdeps/linux/common/waitid.c b/libc/sysdeps/linux/common/waitid.c
index c8115f9a5..58f467320 100644
--- a/libc/sysdeps/linux/common/waitid.c
+++ b/libc/sysdeps/linux/common/waitid.c
@@ -8,43 +8,19 @@
#include <features.h>
#if defined __USE_SVID || defined __USE_XOPEN
-# include <string.h>
-# include <sys/types.h>
-# include <sys/wait.h>
-# include <sys/syscall.h>
-
-# ifdef __NR_waitid
-# ifdef __UCLIBC_HAS_THREADS_NATIVE__
-# include <sysdep-cancel.h>
-# else
-# define SINGLE_THREAD_P 1
-# endif
-
-/* The waitid() POSIX interface takes 4 arguments, but the kernel function
- * actually takes 5. The fifth is a pointer to struct rusage. Make sure
- * we pass NULL rather than letting whatever was in the register bleed up.
- */
-#define __NR_waitid5 __NR_waitid
-static __always_inline
-_syscall5(int, waitid5, idtype_t, idtype, id_t, id, siginfo_t*, infop,
- int, options, struct rusage*, ru)
-# endif
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <cancel.h>
+#ifndef __NR_waitid
+# include <string.h>
+#endif
-int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
+static int __NC(waitid)(idtype_t idtype, id_t id, siginfo_t *infop, int options)
{
-# ifdef __NR_waitid
- if (SINGLE_THREAD_P)
- return waitid5(idtype, id, infop, options, NULL);
-
-# ifdef __UCLIBC_HAS_THREADS_NATIVE__
- int oldtype = LIBC_CANCEL_ASYNC ();
- int result = waitid5(idtype, id, infop, options, NULL);
- LIBC_CANCEL_RESET (oldtype);
- return result;
-# endif
-
-# elif defined __NR_waitpid
+#ifdef __NR_waitid
+ return INLINE_SYSCALL(waitid, 5, idtype, id, infop, options, NULL);
+#else
switch (idtype) {
case P_PID:
if (id <= 0)
@@ -65,17 +41,17 @@ int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
}
memset(infop, 0, sizeof *infop);
- infop->si_pid = waitpid(id, &infop->si_status, options
-# ifdef WEXITED
+ infop->si_pid = __NC(waitpid)(id, &infop->si_status, options
+# ifdef WEXITED
&~ WEXITED
-# endif
+# endif
);
if (infop->si_pid < 0)
return infop->si_pid;
return 0;
-# else
- __set_errno(ENOSYS);
- return -1;
-# endif
+#endif
}
+CANCELLABLE_SYSCALL(int, waitid, (idtype_t idtype, id_t id, siginfo_t *infop, int options),
+ (idtype, id, infop, options))
+
#endif