The setpgrp problem

• Program pid.c

  • #include <stdio.h>
  • #include <unistd.h>
  • int main(int argc,char* argv[])
  • {
  • fprintf(stderr,"PID=%d\n",getpid());
  • fprintf(stderr,"PGRP=%d\n",getpgrp());
  • fprintf(stderr,"setpgrp return=%d: ",setpgrp());
  • perror("");
  • return 0;
  • }

• pid

  • PID=22581
  • PGRP=22581
  • setpgrp return=0: Success

• bpsh 0 pid

  • PID=22583
  • PGRP=22582
  • setpgrp return=-1: No such process

Notes: