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Annotation of 43BSDTahoe/ucb/printenv.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1987 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      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.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: char copyright[] =
                     20: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
                     21:  All rights reserved.\n";
                     22: #endif /* not lint */
                     23: 
                     24: #ifndef lint
                     25: static char sccsid[] = "@(#)printenv.c 5.3 (Berkeley) 6/29/88";
                     26: #endif /* not lint */
                     27: 
                     28: /*
                     29:  * printenv
                     30:  *
                     31:  * Bill Joy, UCB
                     32:  * February, 1979
                     33:  */
                     34: main(argc, argv)
                     35:        int argc;
                     36:        char **argv;
                     37: {
                     38:        extern char **environ;
                     39:        register char *cp, **ep;
                     40:        register int len;
                     41: 
                     42:        if (argc < 2) {
                     43:                for (ep = environ; *ep; ep++)
                     44:                        puts(*ep);
                     45:                exit(0);
                     46:        }
                     47:        len = strlen(*++argv);
                     48:        for (ep = environ; *ep; ep++)
                     49:                if (!strncmp(*ep, *argv, len)) {
                     50:                        cp = *ep + len;
                     51:                        if (!*cp || *cp == '=') {
                     52:                                puts(*cp ? cp + 1 : cp);
                     53:                                exit(0);
                     54:                        }
                     55:                }
                     56:        exit(1);
                     57: }

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