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Annotation of 43BSDReno/usr.bin/env/env.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 The 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) 1988 The Regents of the University of California.\n\
                     23:  All rights reserved.\n";
                     24: #endif /* not lint */
                     25: 
                     26: #ifndef lint
                     27: static char sccsid[] = "@(#)env.c      5.3 (Berkeley) 6/1/90";
                     28: #endif /* not lint */
                     29: 
                     30: #include <stdio.h>
                     31: #include <string.h>
                     32: 
                     33: main(argc, argv)
                     34:        int argc;
                     35:        char **argv;
                     36: {
                     37:        extern char **environ;
                     38:        extern int errno, optind;
                     39:        register char **ep, *p;
                     40:        char *cleanenv[1];
                     41:        int ch;
                     42: 
                     43:        while ((ch = getopt(argc, argv, "-")) != EOF)
                     44:                switch((char)ch) {
                     45:                case '-':
                     46:                        environ = cleanenv;
                     47:                        cleanenv[0] = NULL;
                     48:                        break;
                     49:                case '?':
                     50:                default:
                     51:                        (void)fprintf(stderr,
                     52:                            "usage: env [-] [name=value ...] [command]\n");
                     53:                        exit(1);
                     54:                }
                     55:        for (argv += optind; *argv && (p = index(*argv, '=')); ++argv)
                     56:                (void)setenv(*argv, ++p, 1);
                     57:        if (*argv) {
                     58:                execvp(*argv, argv);
                     59:                (void)fprintf(stderr, "env: %s: %s\n", *argv,
                     60:                    strerror(errno));
                     61:                exit(1);
                     62:        }
                     63:        for (ep = environ; *ep; ep++)
                     64:                (void)printf("%s\n", *ep);
                     65:        exit(0);
                     66: }

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