projects / apple / xnu.git / blame
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| 9bccf70c A |
1 | .\" $NetBSD: getgid.2,v 1.5 1995/02/27 12:32:53 cgd Exp $ |
| 2 | .\" | |
| 3 | .\" Copyright (c) 1983, 1991, 1993 | |
| 4 | .\" The Regents of the University of California. All rights reserved. | |
| 5 | .\" | |
| 6 | .\" Redistribution and use in source and binary forms, with or without | |
| 7 | .\" modification, are permitted provided that the following conditions | |
| 8 | .\" are met: | |
| 9 | .\" 1. Redistributions of source code must retain the above copyright | |
| 10 | .\" notice, this list of conditions and the following disclaimer. | |
| 11 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
| 12 | .\" notice, this list of conditions and the following disclaimer in the | |
| 13 | .\" documentation and/or other materials provided with the distribution. | |
| 14 | .\" 3. All advertising materials mentioning features or use of this software | |
| 15 | .\" must display the following acknowledgement: | |
| 16 | .\" This product includes software developed by the University of | |
| 17 | .\" California, Berkeley and its contributors. | |
| 18 | .\" 4. Neither the name of the University nor the names of its contributors | |
| 19 | .\" may be used to endorse or promote products derived from this software | |
| 20 | .\" without specific prior written permission. | |
| 21 | .\" | |
| 22 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 23 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 24 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 25 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 26 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 27 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 28 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 29 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 30 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 31 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 32 | .\" SUCH DAMAGE. | |
| 33 | .\" | |
| 34 | .\" @(#)getgid.2 8.1 (Berkeley) 6/4/93 | |
| 35 | .\" | |
| 36 | .Dd June 4, 1993 | |
| 37 | .Dt GETGID 2 | |
| 38 | .Os BSD 4.2 | |
| 39 | .Sh NAME | |
| 40 | .Nm getgid , | |
| 41 | .Nm getegid | |
| 42 | .Nd get group process identification | |
| 43 | .Sh SYNOPSIS | |
| 44 | .Fd #include <sys/types.h> | |
| 45 | .Fd #include <unistd.h> | |
| 46 | .Ft gid_t | |
| 47 | .Fn getgid void | |
| 48 | .Ft gid_t | |
| 49 | .Fn getegid void | |
| 50 | .Sh DESCRIPTION | |
| 51 | The | |
| 52 | .Fn getgid | |
| 53 | function returns the real group ID of the calling process, | |
| 54 | .Fn getegid | |
| 55 | returns the effective group ID of the calling process. | |
| 56 | .Pp | |
| 57 | The real group ID is specified at login time. | |
| 58 | .Pp | |
| 59 | The real group ID is the group of the user who invoked the program. | |
| 60 | As the effective group ID gives the process additional permissions | |
| 61 | during the execution of | |
| 62 | .Dq Em set-group-ID | |
| 63 | mode processes, | |
| 64 | .Fn getgid | |
| 65 | is used to determine the real-user-id of the calling process. | |
| 66 | .Sh ERRORS | |
| 67 | The | |
| 68 | .Fn getgid | |
| 69 | and | |
| 70 | .Fn getegid | |
| 71 | functions are always successful, and no return value is reserved to | |
| 72 | indicate an error. | |
| 73 | .Sh SEE ALSO | |
| 74 | .Xr getuid 2 , | |
| 75 | .Xr setregid 2 , | |
| 76 | .Xr setgid 3 | |
| 77 | .Sh STANDARDS | |
| 78 | .Fn Getgid | |
| 79 | and | |
| 80 | .Fn getegid | |
| 81 | conform to | |
| 82 | .St -p1003.1-88 . |