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Annotation of 43BSDReno/usr.bin/printenv/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: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: char copyright[] =
                     22: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
                     23:  All rights reserved.\n";
                     24: #endif /* not lint */
                     25: 
                     26: #ifndef lint
                     27: static char sccsid[] = "@(#)printenv.c 5.4 (Berkeley) 6/1/90";
                     28: #endif /* not lint */
                     29: 
                     30: /*
                     31:  * printenv
                     32:  *
                     33:  * Bill Joy, UCB
                     34:  * February, 1979
                     35:  */
                     36: main(argc, argv)
                     37:        int argc;
                     38:        char **argv;
                     39: {
                     40:        extern char **environ;
                     41:        register char *cp, **ep;
                     42:        register int len;
                     43: 
                     44:        if (argc < 2) {
                     45:                for (ep = environ; *ep; ep++)
                     46:                        puts(*ep);
                     47:                exit(0);
                     48:        }
                     49:        len = strlen(*++argv);
                     50:        for (ep = environ; *ep; ep++)
                     51:                if (!strncmp(*ep, *argv, len)) {
                     52:                        cp = *ep + len;
                     53:                        if (!*cp || *cp == '=') {
                     54:                                puts(*cp ? cp + 1 : cp);
                     55:                                exit(0);
                     56:                        }
                     57:                }
                     58:        exit(1);
                     59: }

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