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-rw-r--r--libc/sysdeps/linux/common/waitid.c45
1 files changed, 40 insertions, 5 deletions
diff --git a/libc/sysdeps/linux/common/waitid.c b/libc/sysdeps/linux/common/waitid.c
index b8d2f70ba..ce3d5dc05 100644
--- a/libc/sysdeps/linux/common/waitid.c
+++ b/libc/sysdeps/linux/common/waitid.c
@@ -5,12 +5,47 @@
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
-#include <sys/syscall.h>
+#include <features.h>
#if defined __USE_SVID || defined __USE_XOPEN
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/wait.h>
+# include <sys/types.h>
+# include <sys/wait.h>
+# include <sys/syscall.h>
+# ifdef __NR_waitid
+_syscall4(int, waitid, idtype_t, idtype, id_t, id, siginfo_t*, infop, int, options)
+# else
+# include <string.h>
+libc_hidden_proto(waitpid)
+int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
+{
+ switch (idtype) {
+ case P_PID:
+ if (id <= 0)
+ goto invalid;
+ break;
+ case P_PGID:
+ if (id < 0 || id == 1)
+ goto invalid;
+ id = -id;
+ break;
+ case P_ALL:
+ id = -1;
+ break;
+ default:
+ invalid:
+ __set_errno(EINVAL);
+ return -1;
+ }
-_syscall4(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
+ &~ WEXITED
+# endif
+ );
+ if (infop->si_pid < 0)
+ return infop->si_pid;
+ return 0;
+}
+# endif
#endif