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| | #include <sys/wait.h>
#include "syscall.h"
#ifndef SYS_wait4
hidden pid_t __wait4(pid_t pid, int *status, int options, void *kru, int cp)
{
idtype_t t;
int r;
siginfo_t info;
info.si_pid = 0;
if (pid < -1) {
t = P_PGID;
pid = -pid;
} else if (pid == -1) {
t = P_ALL;
} else if (pid == 0) {
t = P_PGID;
} else {
t = P_PID;
}
if (cp) r = __syscall_cp(SYS_waitid, t, pid, &info, options|WEXITED, kru);
else r = __syscall(SYS_waitid, t, pid, &info, options|WEXITED, kru);
if (r<0) return r;
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:
/* see ptrace(2); the high bits of si_status can contain */
/* PTRACE_EVENT_ values which must be preserved */
sw = (info.si_status << 8) + 0x7f;
break;
}
*status = sw;
}
return info.si_pid;
}
#endif
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