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Annotation of src/usr.bin/env/env.c, Revision 1.2

1.1       deraadt     1: /*
                      2:  * Copyright (c) 1988, 1993, 1994
                      3:  *     The Regents of the University of California.  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: static char copyright[] =
                     36: "@(#) Copyright (c) 1988, 1993, 1994\n\
                     37:        The Regents of the University of California.  All rights reserved.\n";
                     38: #endif /* not lint */
                     39:
                     40: #ifndef lint
                     41: /*static char sccsid[] = "@(#)env.c    8.3 (Berkeley) 4/2/94";*/
1.2     ! deraadt    42: static char rcsid[] = "$NetBSD: env.c,v 1.9 1996/05/07 18:32:22 jtc Exp $";
1.1       deraadt    43: #endif /* not lint */
                     44:
                     45: #include <err.h>
                     46: #include <stdio.h>
                     47: #include <string.h>
                     48: #include <stdlib.h>
                     49: #include <unistd.h>
                     50: #include <locale.h>
                     51: #include <errno.h>
                     52:
                     53: static void usage __P((void));
                     54:
                     55: int
                     56: main(argc, argv)
                     57:        int argc;
                     58:        char **argv;
                     59: {
                     60:        extern char **environ;
1.2     ! deraadt    61:        extern int optind;
1.1       deraadt    62:        char **ep, *p;
                     63:        char *cleanenv[1];
                     64:        int ch;
                     65:
                     66:        setlocale(LC_ALL, "");
                     67:
                     68:        while ((ch = getopt(argc, argv, "-i")) != -1)
                     69:                switch((char)ch) {
                     70:                case '-':                       /* obsolete */
                     71:                case 'i':
                     72:                        environ = cleanenv;
                     73:                        cleanenv[0] = NULL;
                     74:                        break;
                     75:                case '?':
                     76:                default:
                     77:                        usage();
                     78:                }
                     79:
                     80:        for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
                     81:                (void)setenv(*argv, ++p, 1);
                     82:
                     83:        if (*argv) {
                     84:                /* return 127 if the command to be run could not be found; 126
                     85:                   if the command was was found but could not be invoked */
                     86:
                     87:                execvp(*argv, argv);
                     88:                err((errno == ENOENT) ? 127 : 126, "%s", *argv);
                     89:                /* NOTREACHED */
                     90:        }
                     91:
                     92:        for (ep = environ; *ep; ep++)
                     93:                (void)printf("%s\n", *ep);
                     94:
                     95:        exit(0);
                     96: }
                     97:
                     98: static void
                     99: usage ()
                    100: {
                    101:        (void) fprintf(stderr, "usage: env [-i] [name=value ...] [command]\n");
                    102:        exit (1);
                    103: }