1SETPGRP(3P) POSIX Programmer's Manual SETPGRP(3P)
2
3
4
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
11
13 setpgrp — set the process group ID
14
16 #include <unistd.h>
17
18 pid_t setpgrp(void);
19
21 If the calling process is not already a session leader, setpgrp() sets
22 the process group ID of the calling process to the process ID of the
23 calling process. If setpgrp() creates a new session, then the new ses‐
24 sion has no controlling terminal.
25
26 The setpgrp() function has no effect when the calling process is a ses‐
27 sion leader.
28
30 Upon completion, setpgrp() shall return the process group ID.
31
33 No errors are defined.
34
35 The following sections are informative.
36
38 None.
39
41 It is unspecified whether this function behaves as setpgid(0,0) or set‐
42 sid() unless the process is already a session leader. Therefore, appli‐
43 cations are encouraged to use setpgid() or setsid() as appropriate.
44
46 None.
47
49 The setpgrp() function may be removed in a future version.
50
52 exec, fork(), getpid(), getsid(), kill(), setpgid(), setsid()
53
54 The Base Definitions volume of POSIX.1‐2008, <unistd.h>
55
57 Portions of this text are reprinted and reproduced in electronic form
58 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
59 -- Portable Operating System Interface (POSIX), The Open Group Base
60 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
61 cal and Electronics Engineers, Inc and The Open Group. (This is
62 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
63 event of any discrepancy between this version and the original IEEE and
64 The Open Group Standard, the original IEEE and The Open Group Standard
65 is the referee document. The original Standard can be obtained online
66 at http://www.unix.org/online.html .
67
68 Any typographical or formatting errors that appear in this page are
69 most likely to have been introduced during the conversion of the source
70 files to man page format. To report such errors, see https://www.ker‐
71 nel.org/doc/man-pages/reporting_bugs.html .
72
73
74
75IEEE/The Open Group 2013 SETPGRP(3P)