NAME

       explain_setpgid_or_die - set process group and report errors

SYNOPSIS

       #include <libexplain/setpgid.h>
       void explain_setpgid_or_die(pid_t pid, pid_t pgid);
       int explain_setpgid_on_error(pid_t pid, pid_t pgid);

DESCRIPTION

       The explain_setpgid_or_die function is used to call the setpgid(2) system call. On failure
       an explanation will be printed to stderr, obtained from the  explain_setpgid(3)  function,
       and then the process terminates by calling exit(EXIT_FAILURE).

       The  explain_setpgid_on_error  function  is  used  to  call the setpgid(2) system call. On
       failure an explanation will be printed to stderr,  obtained  from  the  explain_setpgid(3)
       function, but still returns to the caller.

       pid     The pid, exactly as to be passed to the setpgid(2) system call.

       pgid    The pgid, exactly as to be passed to the setpgid(2) system call.

RETURN VALUE

       The  explain_setpgid_or_die  function  only  returns  on  success, see setpgid(2) for more
       information. On failure, prints an explanation and exits, it does not return.

       The explain_setpgid_on_error function always returns  the  value  return  by  the  wrapped
       setpgid(2) system call.

EXAMPLE

       The  explain_setpgid_or_die  function  is  intended to be used in a fashion similar to the
       following example:
              explain_setpgid_or_die(pid, pgid);

SEE ALSO

       setpgid(2)
               set process group

       explain_setpgid(3)
               explain setpgid(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2011 Peter Miller

                                                                        explain_setpgid_or_die(3)