121295Sdist /*
221295Sdist * Copyright (c) 1980 Regents of the University of California.
334205Sbostic * All rights reserved.
434205Sbostic *
534205Sbostic * Redistribution and use in source and binary forms are permitted
6*34789Sbostic * provided that the above copyright notice and this paragraph are
7*34789Sbostic * duplicated in all such forms and that any documentation,
8*34789Sbostic * advertising materials, and other materials related to such
9*34789Sbostic * distribution and use acknowledge that the software was developed
10*34789Sbostic * by the University of California, Berkeley. The name of the
11*34789Sbostic * University may not be used to endorse or promote products derived
12*34789Sbostic * from this software without specific prior written permission.
13*34789Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14*34789Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15*34789Sbostic * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1621295Sdist */
1721295Sdist
1811696Smckusick #ifndef lint
19*34789Sbostic static char sccsid[] = "@(#)shell.c 5.3 (Berkeley) 06/18/88";
2034205Sbostic #endif /* not lint */
2111696Smckusick
2211696Smckusick /*
2311696Smckusick ** CALL THE SHELL
2411696Smckusick */
2511696Smckusick
shell()2611696Smckusick shell()
2711696Smckusick {
2811696Smckusick int i;
2911696Smckusick register int pid;
3011696Smckusick register int sav2, sav3;
3111696Smckusick
3211696Smckusick if (!(pid = fork()))
3311696Smckusick {
3411696Smckusick setuid(getuid());
3511696Smckusick nice(0);
3612345Slayer execl("/bin/csh", "-", 0);
3712345Slayer syserr("cannot execute /bin/csh");
3811696Smckusick }
3911696Smckusick sav2 = signal(2, 1);
4011696Smckusick sav3 = signal(3, 1);
4111696Smckusick while (wait(&i) != pid) ;
4211696Smckusick signal(2, sav2);
4311696Smckusick signal(3, sav3);
4411696Smckusick }
45