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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 | |
6 | * provided that this notice is preserved and that due credit is given | |
7 | * to the University of California at Berkeley. The name of the University | |
8 | * may not be used to endorse or promote products derived from this | |
9 | * software without specific prior written permission. This software | |
10 | * is provided ``as is'' without express or implied warranty. | |
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11 | */ |
12 | ||
9d9faa64 | 13 | #ifndef lint |
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14 | static char sccsid[] = "@(#)shell.c 5.2 (Berkeley) %G%"; |
15 | #endif /* not lint */ | |
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16 | |
17 | /* | |
18 | ** CALL THE SHELL | |
19 | */ | |
20 | ||
21 | shell() | |
22 | { | |
23 | int i; | |
24 | register int pid; | |
25 | register int sav2, sav3; | |
26 | ||
27 | if (!(pid = fork())) | |
28 | { | |
29 | setuid(getuid()); | |
30 | nice(0); | |
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31 | execl("/bin/csh", "-", 0); |
32 | syserr("cannot execute /bin/csh"); | |
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33 | } |
34 | sav2 = signal(2, 1); | |
35 | sav3 = signal(3, 1); | |
36 | while (wait(&i) != pid) ; | |
37 | signal(2, sav2); | |
38 | signal(3, sav3); | |
39 | } |