projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright (C) 2014, Michael Kerrisk <mtk.manpages@gmail.com> |
| 2 | .\" | |
| 3 | .\" %%%LICENSE_START(VERBATIM) | |
| 4 | .\" Permission is granted to make and distribute verbatim copies of this | |
| 5 | .\" manual provided the copyright notice and this permission notice are | |
| 6 | .\" preserved on all copies. | |
| 7 | .\" | |
| 8 | .\" Permission is granted to copy and distribute modified versions of this | |
| 9 | .\" manual under the conditions for verbatim copying, provided that the | |
| 10 | .\" entire resulting derived work is distributed under the terms of a | |
| 11 | .\" permission notice identical to this one. | |
| 12 | .\" | |
| 13 | .\" Since the Linux kernel and libraries are constantly changing, this | |
| 14 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
| 15 | .\" responsibility for errors or omissions, or for damages resulting from | |
| 16 | .\" the use of the information contained herein. The author(s) may not | |
| 17 | .\" have taken the same level of care in the production of this manual, | |
| 18 | .\" which is licensed free of charge, as they might when working | |
| 19 | .\" professionally. | |
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| 21 | .\" Formatted or processed versions of this manual, if unaccompanied by | |
| 22 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 23 | .\" %%%LICENSE_END | |
| 24 | .\" | |
| 25 | .TH GROUP_MEMBER 3 2014-03-30 "GNU" "Linux Programmer's Manual" | |
| 26 | .SH NAME | |
| 27 | group_member \- test whether a process is in a group | |
| 28 | .SH SYNOPSIS | |
| 29 | .B #include <unistd.h> | |
| 68e4db0a | 30 | .PP |
| 701f91bd | 31 | .BI "int group_member(gid_t " gid ); |
| 68e4db0a | 32 | .PP |
| 701f91bd MK |
33 | .in -4n |
| 34 | Feature Test Macro Requirements for glibc (see | |
| 35 | .BR feature_test_macros (7)): | |
| 36 | .in | |
| 68e4db0a | 37 | .PP |
| 701f91bd MK |
38 | .BR group_member (): |
| 39 | _GNU_SOURCE | |
| 40 | .SH DESCRIPTION | |
| 41 | The | |
| 42 | .BR group_member () | |
| 43 | function tests whether any of the caller's supplementary group IDs | |
| 44 | (as returned by | |
| 45 | .BR getgroups (2)) | |
| 46 | matches | |
| 47 | .IR gid . | |
| 48 | .SH RETURN VALUE | |
| 49 | The | |
| 50 | .BR group_member () | |
| 51 | function returns nonzero if any of the caller's | |
| 52 | supplementary group IDs matches | |
| 53 | .IR gid , | |
| 54 | and zero otherwise. | |
| 55 | .SH CONFORMING TO | |
| 56 | This function is a nonstandard GNU extension. | |
| 57 | .SH SEE ALSO | |
| 58 | .BR getgid (2), | |
| 59 | .BR getgroups (2), | |
| 60 | .BR getgrouplist (3), | |
| 61 | .BR group (5) |