diff options
| -rw-r--r-- | libc/sysdeps/linux/common/waitid.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/common/waitid.c b/libc/sysdeps/linux/common/waitid.c index 6218cdd53..b7930a02d 100644 --- a/libc/sysdeps/linux/common/waitid.c +++ b/libc/sysdeps/linux/common/waitid.c @@ -8,16 +8,27 @@ #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 -_syscall4(int, waitid, idtype_t, idtype, id_t, id, siginfo_t*, infop, int, options) -# else -# include <string.h> +/* 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 _syscall5(int, waitid5, idtype_t, idtype, id_t, id, siginfo_t*, infop, + int, options, struct rusage*, ru) +# endif + /* libc_hidden_proto(waitpid) */ int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options) { +# ifdef __NR_waitid + return waitid5(idtype, id, infop, options, NULL); +# else switch (idtype) { case P_PID: if (id <= 0) @@ -46,6 +57,7 @@ int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options) if (infop->si_pid < 0) return infop->si_pid; return 0; -} # endif +} + #endif |