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1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
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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. | |
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16 | */ |
17 | ||
9d9faa64 | 18 | #ifndef lint |
d99e6414 | 19 | static char sccsid[] = "@(#)shell.c 5.3 (Berkeley) %G%"; |
e9fb6bea | 20 | #endif /* not lint */ |
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21 | |
22 | /* | |
23 | ** CALL THE SHELL | |
24 | */ | |
25 | ||
26 | shell() | |
27 | { | |
28 | int i; | |
29 | register int pid; | |
30 | register int sav2, sav3; | |
31 | ||
32 | if (!(pid = fork())) | |
33 | { | |
34 | setuid(getuid()); | |
35 | nice(0); | |
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36 | execl("/bin/csh", "-", 0); |
37 | syserr("cannot execute /bin/csh"); | |
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38 | } |
39 | sav2 = signal(2, 1); | |
40 | sav3 = signal(3, 1); | |
41 | while (wait(&i) != pid) ; | |
42 | signal(2, sav2); | |
43 | signal(3, sav3); | |
44 | } |