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Annotation of src/usr.bin/printenv/printenv.c, Revision 1.1.1.1

1.1       deraadt     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, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  */
                     33:
                     34: #ifndef lint
                     35: char copyright[] =
                     36: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
                     37:  All rights reserved.\n";
                     38: #endif /* not lint */
                     39:
                     40: #ifndef lint
                     41: /*static char sccsid[] = "from: @(#)printenv.c 5.4 (Berkeley) 6/1/90";*/
                     42: static char rcsid[] = "$Id: printenv.c,v 1.4 1993/12/31 19:28:15 jtc Exp $";
                     43: #endif /* not lint */
                     44:
                     45: #include <stdio.h>
                     46: #include <string.h>
                     47: #include <stdlib.h>
                     48:
                     49: /*
                     50:  * printenv
                     51:  *
                     52:  * Bill Joy, UCB
                     53:  * February, 1979
                     54:  */
                     55: int
                     56: main(argc, argv)
                     57:        int argc;
                     58:        char **argv;
                     59: {
                     60:        extern char **environ;
                     61:        register char *cp, **ep;
                     62:        register int len;
                     63:
                     64:        if (argc < 2) {
                     65:                for (ep = environ; *ep; ep++)
                     66:                        puts(*ep);
                     67:                exit(0);
                     68:        }
                     69:        len = strlen(*++argv);
                     70:        for (ep = environ; *ep; ep++)
                     71:                if (!strncmp(*ep, *argv, len)) {
                     72:                        cp = *ep + len;
                     73:                        if (!*cp || *cp == '=') {
                     74:                                puts(*cp ? cp + 1 : cp);
                     75:                                exit(0);
                     76:                        }
                     77:                }
                     78:        exit(1);
                     79: }