getpgid(3p) - phpMan

GETPGID(P)                                                          GETPGID(P)



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 pro-
       cess 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 IEEE Std 1003.1-2001, <unistd.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information  Technology  --  Portable  Operating
       System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C)
       2001-2003 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 .



POSIX                                2003                           GETPGID(P)

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