projects / unix-history / blame
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1 | .\" Copyright (c) 1980 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 345fe298 | 5 | .\" @(#)getuid.2 6.3 (Berkeley) %G% |
| 42a92ee6 | 6 | .\" |
| 9c9177ce | 7 | .TH GETUID 2 "" |
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8 | .UC 4 |
| 9 | .SH NAME | |
| 6db89aec | 10 | getuid, geteuid \- get user identity |
| 42a92ee6 | 11 | .SH SYNOPSIS |
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12 | .nf |
| 13 | .ft B | |
| 14 | #include <sys/types.h> | |
| 15 | .PP | |
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16 | .ft B |
| 17 | .nf | |
| 18 | uid = getuid() | |
| 345fe298 | 19 | uid_t uid; |
| 42a92ee6 | 20 | .PP |
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21 | .ft B |
| 22 | euid = geteuid() | |
| 345fe298 | 23 | uid_t euid; |
| 6db89aec | 24 | .fi |
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25 | .SH DESCRIPTION |
| 26 | .I Getuid | |
| 27 | returns the real user ID of the current process, | |
| 28 | .I geteuid | |
| 29 | the effective user ID. | |
| 42a92ee6 | 30 | .PP |
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31 | The real user ID identifies the person who is logged in. |
| 32 | The effective user ID | |
| 33 | gives the process additional permissions during | |
| 34 | execution of \*(lqset-user-ID\*(rq mode processes, which use | |
| 63b0bb9c | 35 | \fIgetuid\fP to determine the real-user-id of the process that |
| 6db89aec | 36 | invoked them. |
| 42a92ee6 | 37 | .SH "SEE ALSO" |
| 6db89aec | 38 | getgid(2), setreuid(2) |