Originální popis anglicky:
getpgid - get the process group ID for a process
Návod, kniha: POSIX Programmer's Manual
#include <unistd.h>
pid_t getpgid(pid_t
pid);
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.
Upon successful completion,
getpgid() shall return a process group ID.
Otherwise, it shall return (
pid_t)-1 and set
errno to indicate
the error.
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.
None.
None.
None.
None.
exec() ,
fork() ,
getpgrp() ,
getpid() ,
getsid() ,
setpgid() ,
setsid() , the Base Definitions
volume of IEEE Std 1003.1-2001,
<unistd.h>
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
.
