int waitid(idtype_t which, id_t id, siginfo_t* info, int options) {
/* the system call takes an option struct rusage that we don't need */
return __waitid(which, id, info, options, NULL);
}
__pid_t
__libc_waitpid (__pid_t pid, int *stat_loc, int options)
{
__idtype_t idtype;
__pid_t tmp_pid = pid;
__siginfo_t infop;
if (pid <= WAIT_MYPGRP)
{
if (pid == WAIT_ANY)
{
/* Request the status for any child. */
idtype = P_ALL;
}
else if (pid == WAIT_MYPGRP)
{
/* Request the status for any child process that has
a pgid that's equal to that of our parent. */
tmp_pid = __getpgid (0);
idtype = P_PGID;
}
else /* PID < -1 */
{
/* Request the status for any child whose pgid is equal
to the absolute value of PID. */
tmp_pid = pid & ~0; /* XXX not pseudo-insn */
idtype = P_PGID;
}
}
else
{
/* Request the status for the child whose pid is PID. */
idtype = P_PID;
}
if (__waitid (idtype, tmp_pid, &infop, options | WEXITED | WTRAPPED) < 0)
return -1;
switch (infop.__code)
{
case EXITED:
*stat_loc = W_EXITCODE (infop.__status, 0);
break;
case STOPPED:
case TRAPPED:
*stat_loc = W_STOPCODE (infop.__status);
break;
case KILLED:
/* Don't know what to do with continue, since it isn't documented.
Putting it here seemed the right place though. */
case CONTINUED:
*stat_loc = infop.__status;
/* FALLTHROUGH */
case CORED:
*stat_loc |= WCOREFLAG;
break;
}
/* Return the PID out of the INFOP structure instead of the one we were
called with, to account for cases of being called with -1 to signify
any PID. */
return infop.__pid;
}
