getpgid(3p) — Linux manual page

GETPGID(3P)             POSIX Programmer's Manual            GETPGID(3P)

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(1p), fork(3p), getpgrp(3p), getpid(3p), getsid(3p),
       setpgid(3p), setsid(3p)

       The Base Definitions volume of POSIX.1‐2017, unistd.h(0p)

COPYRIGHT

       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 .

IEEE/The Open Group               2017                       GETPGID(3P)

Pages that refer to this page: unistd.h(0p), getpgrp(3p), getppid(3p), getsid(3p), killpg(3p)

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