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