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#include <sys/types.h>
#include <sys/wait.h>
#include "error.h"
#include "haswaitp.h"
#ifdef HASWAITPID
int wait_pid(wstat,pid) int *wstat; int pid;
{
int r;
do
r = waitpid(pid,wstat,0);
while ((r == -1) && (errno == error_intr));
return r;
}
#else
/* XXX untested */
/* XXX breaks down with more than two children */
static int oldpid = 0;
static int oldwstat; /* defined if(oldpid) */
int wait_pid(wstat,pid) int *wstat; int pid;
{
int r;
if (pid == oldpid) { *wstat = oldwstat; oldpid = 0; return pid; }
do {
r = wait(wstat);
if ((r != pid) && (r != -1)) { oldwstat = *wstat; oldpid = r; continue; }
}
while ((r == -1) && (errno == error_intr));
return r;
}
#endif
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