Subversion Repositories planix.SVN

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include "sys9.h"

pid_t
getppid(void)
{
        int n, f;
        char ppidbuf[15];

        f = open("#c/ppid", 0);
        n = read(f, ppidbuf, sizeof ppidbuf);
        if(n < 0)
                errno = EINVAL;
        else
                n = atoi(ppidbuf);
        close(f);
        return n;
}