Subversion Repositories planix.SVN

#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;
}