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f42904bc | 1 | /* |
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2 | * Copyright (c) 1988 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
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6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
f42904bc DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
19 | char copyright[] = | |
1ba96f46 | 20 | "@(#) Copyright (c) 1988 Regents of the University of California.\n\ |
f42904bc | 21 | All rights reserved.\n"; |
1ba96f46 | 22 | #endif /* not lint */ |
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23 | |
24 | #ifndef lint | |
5e8b0e60 | 25 | static char sccsid[] = "@(#)whoami.c 5.3 (Berkeley) %G%"; |
1ba96f46 | 26 | #endif /* not lint */ |
f42904bc | 27 | |
1ba96f46 | 28 | #include <sys/types.h> |
a309c47b | 29 | #include <pwd.h> |
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30 | |
31 | main() | |
32 | { | |
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33 | struct passwd *p, *getpwuid(); |
34 | uid_t uid; | |
a309c47b | 35 | |
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36 | uid = geteuid(); |
37 | if (!(p = getpwuid(uid))) { | |
38 | printf("whoami: no login associated with uid %u.\n", uid); | |
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39 | exit(1); |
40 | } | |
1ba96f46 | 41 | printf("%s\n", p->pw_name); |
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42 | exit(0); |
43 | } |