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- #include <sys/types.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <errno.h>
- #include <stdio.h>
- #include "sys9.h"
- #include "lib.h"
- pid_t
- getpgrp(void)
- {
- int n, f, pid;
- char pgrpbuf[15], fname[30];
- pid = getpid();
- sprintf(fname, "/proc/%d/noteid", pid);
- f = open(fname, 0);
- n = read(f, pgrpbuf, sizeof pgrpbuf);
- if(n < 0)
- _syserrno();
- else
- n = atoi(pgrpbuf);
- close(f);
- return n;
- }
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