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- /*
- * wait4() for uClibc
- *
- * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- #include <sys/syscall.h>
- #include <sys/wait.h>
- #include <sys/resource.h>
- #if defined(__NR_wait4)
- # define __NR___syscall_wait4 __NR_wait4
- static __always_inline _syscall4(int, __syscall_wait4, __kernel_pid_t, pid,
- int *, status, int, opts, struct rusage *, rusage)
- pid_t __wait4_nocancel(pid_t pid, int *status, int opts, struct rusage *rusage)
- {
- #if defined(__UCLIBC_USE_TIME64__)
- char *arg_rusage = rusage ? (char *)&rusage->ru_maxrss - 4 * sizeof(__S32_TYPE) : 0;
- int __ret = __syscall_wait4(pid, status, opts, (struct rusage *)arg_rusage);
- if (__ret > 0 && rusage) {
- __S32_TYPE __rusage[4];
- memcpy(__rusage, arg_rusage, 4 * sizeof(__S32_TYPE));
- struct timeval tv_utime = {.tv_sec = __rusage[0], .tv_usec = __rusage[1]};
- struct timeval tv_stime = {.tv_sec = __rusage[2], .tv_usec = __rusage[2]};
- rusage->ru_utime = tv_utime;
- rusage->ru_stime = tv_stime;
- }
- return __ret;
- #else
- return __syscall_wait4(pid, status, opts, rusage);
- #endif
- }
- #else
- pid_t __wait4_nocancel(pid_t pid, int *status, int opts, struct rusage *rusage)
- {
- idtype_t type;
- int __res;
- siginfo_t info;
- info.si_pid = 0;
- if (pid < -1) {
- type = P_PGID;
- pid = -pid;
- } else if (pid == -1) {
- type = P_ALL;
- } else if (pid == 0) {
- type = P_PGID;
- } else {
- type = P_PID;
- }
- __res = INLINE_SYSCALL(waitid, 5, type, pid, &info, opts|WEXITED, rusage);
- if ( __res < 0 )
- return __res;
- if (info.si_pid && status) {
- int sw = 0;
- switch (info.si_code) {
- case CLD_CONTINUED:
- sw = 0xffff;
- break;
- case CLD_DUMPED:
- sw = (info.si_status & 0x7f) | 0x80;
- break;
- case CLD_EXITED:
- sw = (info.si_status & 0xff) << 8;
- break;
- case CLD_KILLED:
- sw = info.si_status & 0x7f;
- break;
- case CLD_STOPPED:
- case CLD_TRAPPED:
- sw = (info.si_status << 8) + 0x7f;
- break;
- }
- *status = sw;
- }
- return info.si_pid;
- }
- #endif
- #ifdef __USE_BSD
- strong_alias(__wait4_nocancel,wait4)
- #endif
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