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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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