oracular (3) getpgid.3posix.gz

Provided by: manpages-posix-dev_2017a-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.1‐2017, <unistd.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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.opengroup.org/unix/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 .