| /* vi: set sw=4 ts=4: */ |
| /* |
| * Copyright (C) 2007 Erik Andersen <andersen@uclibc.org> |
| * |
| * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| */ |
| |
| #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 |
| |
| int 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 |
| 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; |
| } |
| |
| 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; |
| # else |
| __set_errno(ENOSYS); |
| return -1; |
| # endif |
| } |
| #endif |