32 lines
463 B
C
32 lines
463 B
C
#include "lib.h"
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include "sys9.h"
|
|
|
|
int
|
|
setpgid(pid_t pid, pid_t pgid)
|
|
{
|
|
int n, f;
|
|
char buf[50], fname[30];
|
|
|
|
if(pid == 0)
|
|
pid = getpid();
|
|
if(pgid == 0)
|
|
pgid = getpgrp();
|
|
sprintf(fname, "/proc/%d/noteid", pid);
|
|
f = open(fname, 1);
|
|
if(f < 0) {
|
|
errno = ESRCH;
|
|
return -1;
|
|
}
|
|
n = sprintf(buf, "%d", pgid);
|
|
n = write(f, buf, n);
|
|
if(n < 0)
|
|
_syserrno();
|
|
else
|
|
n = 0;
|
|
close(f);
|
|
return n;
|
|
}
|