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1 | .\" Copyright (c) 1980, 1991 Regents of the University of California. |
2 | .\" All rights reserved. | |
3 | .\" | |
a9cd9cb7 | 4 | .\" %%%LICENSE_START(BSD_4_CLAUSE_UCB) |
fea681da MK |
5 | .\" Redistribution and use in source and binary forms, with or without |
6 | .\" modification, are permitted provided that the following conditions | |
7 | .\" are met: | |
8 | .\" 1. Redistributions of source code must retain the above copyright | |
9 | .\" notice, this list of conditions and the following disclaimer. | |
10 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
11 | .\" notice, this list of conditions and the following disclaimer in the | |
12 | .\" documentation and/or other materials provided with the distribution. | |
13 | .\" 3. All advertising materials mentioning features or use of this software | |
14 | .\" must display the following acknowledgement: | |
15 | .\" This product includes software developed by the University of | |
16 | .\" California, Berkeley and its contributors. | |
17 | .\" 4. Neither the name of the University nor the names of its contributors | |
18 | .\" may be used to endorse or promote products derived from this software | |
19 | .\" without specific prior written permission. | |
20 | .\" | |
21 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
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29 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | .\" SUCH DAMAGE. | |
8c9302dc | 32 | .\" %%%LICENSE_END |
fea681da MK |
33 | .\" |
34 | .\" @(#)killpg.2 6.5 (Berkeley) 3/10/91 | |
35 | .\" | |
36 | .\" Modified Fri Jul 23 21:55:01 1993 by Rik Faith <faith@cs.unc.edu> | |
37 | .\" Modified Tue Oct 22 08:11:14 EDT 1996 by Eric S. Raymond <esr@thyrsus.com> | |
c11b1abf | 38 | .\" Modified 2004-06-16 by Michael Kerrisk <mtk.manpages@gmail.com> |
fea681da | 39 | .\" Added notes on CAP_KILL |
c13182ef | 40 | .\" Modified 2004-06-21 by aeb |
fea681da | 41 | .\" |
4b8c67d9 | 42 | .TH KILLPG 3 2017-09-15 "Linux" "Linux Programmer's Manual" |
fea681da MK |
43 | .SH NAME |
44 | killpg \- send signal to a process group | |
45 | .SH SYNOPSIS | |
46 | .B #include <signal.h> | |
68e4db0a | 47 | .PP |
fea681da | 48 | .BI "int killpg(int " pgrp ", int " sig ); |
68e4db0a | 49 | .PP |
cc4615cc MK |
50 | .in -4n |
51 | Feature Test Macro Requirements for glibc (see | |
52 | .BR feature_test_macros (7)): | |
53 | .in | |
c267cf74 MK |
54 | .ad l |
55 | .TP 4 | |
cc4615cc | 56 | .BR killpg (): |
f8619b6a | 57 | _XOPEN_SOURCE\ >=\ 500 |
cf7fa0a1 | 58 | .\" || _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED |
f8619b6a MK |
59 | || /* Since glibc 2.19: */ _DEFAULT_SOURCE |
60 | || /* Glibc versions <= 2.19: */ _BSD_SOURCE | |
c267cf74 | 61 | .ad |
fea681da | 62 | .SH DESCRIPTION |
7145b9a9 | 63 | .BR killpg () |
fea681da MK |
64 | sends the signal |
65 | .I sig | |
66 | to the process group | |
67 | .IR pgrp . | |
68 | See | |
69 | .BR signal (7) | |
70 | for a list of signals. | |
847e0d88 | 71 | .PP |
fea681da MK |
72 | If |
73 | .I pgrp | |
74 | is 0, | |
e511ffb6 | 75 | .BR killpg () |
7dbfafa8 | 76 | sends the signal to the calling process's process group. |
f64cc745 | 77 | (POSIX says: if |
fea681da | 78 | .I pgrp |
d9bfdb9c | 79 | is less than or equal to 1, the behavior is undefined.) |
847e0d88 | 80 | .PP |
6fee0ca3 MK |
81 | For the permissions required to send a signal to another process, see |
82 | .BR kill (2). | |
47297adb | 83 | .SH RETURN VALUE |
c13182ef MK |
84 | On success, zero is returned. |
85 | On error, \-1 is returned, and | |
fea681da MK |
86 | .I errno |
87 | is set appropriately. | |
88 | .SH ERRORS | |
89 | .TP | |
90 | .B EINVAL | |
d1ac81cf | 91 | .I sig |
fea681da MK |
92 | is not a valid signal number. |
93 | .TP | |
94 | .B EPERM | |
95 | The process does not have permission to send the signal | |
96 | to any of the target processes. | |
6fee0ca3 MK |
97 | For the required permissions, see |
98 | .BR kill (2). | |
fea681da MK |
99 | .TP |
100 | .B ESRCH | |
101 | No process can be found in the process group specified by | |
102 | .IR pgrp . | |
103 | .TP | |
104 | .B ESRCH | |
105 | The process group was given as 0 but the sending process does not | |
106 | have a process group. | |
47297adb | 107 | .SH CONFORMING TO |
618364ad | 108 | POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD |
8f6c9a5e | 109 | .RB ( killpg () |
618364ad | 110 | first appeared in 4BSD). |
fea681da MK |
111 | .SH NOTES |
112 | There are various differences between the permission checking | |
efbfd7ec | 113 | in BSD-type systems and System\ V-type systems. |
0bfa087b | 114 | See the POSIX rationale for |
7dbfafa8 | 115 | .BR kill (). |
b5cc2ffb | 116 | A difference not mentioned by POSIX concerns the return |
682edefb MK |
117 | value |
118 | .BR EPERM : | |
119 | BSD documents that no signal is sent and | |
0daa9e92 | 120 | .B EPERM |
682edefb MK |
121 | returned when the permission check failed for at least one target process, |
122 | while POSIX documents | |
123 | .B EPERM | |
124 | only when the permission check failed for all target processes. | |
0722a578 | 125 | .SS C library/kernel differences |
4a6515ef MK |
126 | On Linux, |
127 | .BR killpg () | |
128 | is implemented as a library function that makes the call | |
129 | .IR "kill(-pgrp,\ sig)" . | |
47297adb | 130 | .SH SEE ALSO |
fea681da MK |
131 | .BR getpgrp (2), |
132 | .BR kill (2), | |
133 | .BR signal (2), | |
53a1443c MK |
134 | .BR capabilities (7), |
135 | .BR credentials (7) |