1SETPGRP(3P)                POSIX Programmer's Manual               SETPGRP(3P)
2
3
4

PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
10

NAME

12       setpgrp — set the process group ID
13

SYNOPSIS

15       #include <unistd.h>
16
17       pid_t setpgrp(void);
18

DESCRIPTION

20       If the calling process is not already a session leader, setpgrp()  sets
21       the  process  group  ID of the calling process to the process ID of the
22       calling process. If setpgrp() creates a new session, then the new  ses‐
23       sion has no controlling terminal.
24
25       The setpgrp() function has no effect when the calling process is a ses‐
26       sion leader.
27

RETURN VALUE

29       Upon completion, setpgrp() shall return the process group ID.
30

ERRORS

32       No errors are defined.
33
34       The following sections are informative.
35

EXAMPLES

37       None.
38

APPLICATION USAGE

40       It is unspecified whether this function behaves as setpgid(0,0) or set‐
41       sid() unless the process is already a session leader. Therefore, appli‐
42       cations are encouraged to use setpgid() or setsid() as appropriate.
43

RATIONALE

45       None.
46

FUTURE DIRECTIONS

48       The setpgrp() function may be removed in a future version.
49

SEE ALSO

51       exec, fork(), getpid(), getsid(), kill(), setpgid(), setsid()
52
53       The Base Definitions volume of POSIX.1‐2017, <unistd.h>
54

56       Portions of this text are reprinted and reproduced in  electronic  form
57       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
58       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
59       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
60       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
61       event of any discrepancy between this version and the original IEEE and
62       The Open Group Standard, the original IEEE and The Open Group  Standard
63       is  the  referee document. The original Standard can be obtained online
64       at http://www.opengroup.org/unix/online.html .
65
66       Any typographical or formatting errors that appear  in  this  page  are
67       most likely to have been introduced during the conversion of the source
68       files to man page format. To report such errors,  see  https://www.ker‐
69       nel.org/doc/man-pages/reporting_bugs.html .
70
71
72
73IEEE/The Open Group                  2017                          SETPGRP(3P)
Impressum