bionic (3) getpgid.3posix.gz

Provided by: manpages-posix-dev_2013a-2_all bug

PROLOG
       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.


NAME
       getpgid — get the process group ID for a process


SYNOPSIS
       #include <unistd.h>

       pid_t getpgid(pid_t pid);


DESCRIPTION
       The getpgid() function shall return the process group ID of the process whose process ID is equal to pid.
       If pid is equal to 0, getpgid() shall return the process group ID of the calling process.


RETURN VALUE
       Upon successful completion, getpgid() shall return  a  process  group  ID.  Otherwise,  it  shall  return
       (pid_t)−1 and set errno to indicate the error.


ERRORS
       The getpgid() function shall fail if:

       EPERM  The  process  whose  process ID is equal to pid is not in the same session as the calling process,
              and the implementation does not allow access to the process group ID  of  that  process  from  the
              calling process.

       ESRCH  There is no process with a process ID equal to pid.

       The getpgid() function may fail if:

       EINVAL The value of the pid argument is invalid.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       exec, fork(), getpgrp(), getpid(), getsid(), setpgid(), setsid()

       The Base Definitions volume of POSIX.1‐2008, <unistd.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications  Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc
       and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In  the  event
       of  any  discrepancy between this version and the original IEEE and The Open Group Standard, the original
       IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at
       http://www.unix.org/online.html .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .