blob: d7a7e84c11ed4b45b616becc2aeef3cd74affd09 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
#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
|
