projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu) |
| 2 | .\" | |
| 93015253 | 3 | .\" %%%LICENSE_START(VERBATIM) |
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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. | |
| c13182ef | 12 | .\" |
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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| 14 | .\" manual page may be incorrect or out-of-date.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. | |
| c13182ef | 20 | .\" |
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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. | |
| 4b72fb64 | 23 | .\" %%%LICENSE_END |
| fea681da | 24 | .\" |
| 460495ca | 25 | .TH GETGID 2 2015-08-08 "Linux" "Linux Programmer's Manual" |
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26 | .SH NAME |
| 27 | getgid, getegid \- get group identity | |
| 28 | .SH SYNOPSIS | |
| 29 | .B #include <unistd.h> | |
| 30 | .br | |
| 31 | .B #include <sys/types.h> | |
| 32 | .sp | |
| 33 | .B gid_t getgid(void); | |
| 34 | .br | |
| 35 | .B gid_t getegid(void); | |
| 36 | .SH DESCRIPTION | |
| e511ffb6 | 37 | .BR getgid () |
| a1ffe9f5 | 38 | returns the real group ID of the calling process. |
| fea681da | 39 | |
| e511ffb6 | 40 | .BR getegid () |
| a1ffe9f5 | 41 | returns the effective group ID of the calling process. |
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42 | .SH ERRORS |
| 43 | These functions are always successful. | |
| 47297adb | 44 | .SH CONFORMING TO |
| 431e43bc | 45 | POSIX.1-2001, POSIX.1-2008, 4.3BSD. |
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46 | .SH NOTES |
| 47 | The original Linux | |
| 48 | .BR getgid () | |
| 49 | and | |
| 50 | .BR getegid () | |
| 51 | system calls supported only 16-bit group IDs. | |
| c5662d5d | 52 | Subsequently, Linux 2.4 added |
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53 | .BR getgid32 () |
| 54 | and | |
| 55 | .BR getegid32 (), | |
| 56 | supporting 32-bit IDs. | |
| 57 | The glibc | |
| 58 | .BR getgid () | |
| 59 | and | |
| 60 | .BR getegid () | |
| 61 | wrapper functions transparently deal with the variations across kernel versions. | |
| 47297adb | 62 | .SH SEE ALSO |
| 24e45983 | 63 | .BR getresgid (2), |
| fea681da | 64 | .BR setgid (2), |
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65 | .BR setregid (2), |
| 66 | .BR credentials (7) |