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Annotation of src/usr.bin/env/env.c, Revision 1.3

1.3     ! deraadt     1: /*     $OpenBSD$       */
        !             2:
1.1       deraadt     3: /*
                      4:  * Copyright (c) 1988, 1993, 1994
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *     This product includes software developed by the University of
                     18:  *     California, Berkeley and its contributors.
                     19:  * 4. Neither the name of the University nor the names of its contributors
                     20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #ifndef lint
                     37: static char copyright[] =
                     38: "@(#) Copyright (c) 1988, 1993, 1994\n\
                     39:        The Regents of the University of California.  All rights reserved.\n";
                     40: #endif /* not lint */
                     41:
                     42: #ifndef lint
                     43: /*static char sccsid[] = "@(#)env.c    8.3 (Berkeley) 4/2/94";*/
1.3     ! deraadt    44: static char rcsid[] = "$OpenBSD: env.c,v 1.9 1996/05/07 18:32:22 jtc Exp $";
1.1       deraadt    45: #endif /* not lint */
                     46:
                     47: #include <err.h>
                     48: #include <stdio.h>
                     49: #include <string.h>
                     50: #include <stdlib.h>
                     51: #include <unistd.h>
                     52: #include <locale.h>
                     53: #include <errno.h>
                     54:
                     55: static void usage __P((void));
                     56:
                     57: int
                     58: main(argc, argv)
                     59:        int argc;
                     60:        char **argv;
                     61: {
                     62:        extern char **environ;
1.2       deraadt    63:        extern int optind;
1.1       deraadt    64:        char **ep, *p;
                     65:        char *cleanenv[1];
                     66:        int ch;
                     67:
                     68:        setlocale(LC_ALL, "");
                     69:
                     70:        while ((ch = getopt(argc, argv, "-i")) != -1)
                     71:                switch((char)ch) {
                     72:                case '-':                       /* obsolete */
                     73:                case 'i':
                     74:                        environ = cleanenv;
                     75:                        cleanenv[0] = NULL;
                     76:                        break;
                     77:                case '?':
                     78:                default:
                     79:                        usage();
                     80:                }
                     81:
                     82:        for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
                     83:                (void)setenv(*argv, ++p, 1);
                     84:
                     85:        if (*argv) {
                     86:                /* return 127 if the command to be run could not be found; 126
                     87:                   if the command was was found but could not be invoked */
                     88:
                     89:                execvp(*argv, argv);
                     90:                err((errno == ENOENT) ? 127 : 126, "%s", *argv);
                     91:                /* NOTREACHED */
                     92:        }
                     93:
                     94:        for (ep = environ; *ep; ep++)
                     95:                (void)printf("%s\n", *ep);
                     96:
                     97:        exit(0);
                     98: }
                     99:
                    100: static void
                    101: usage ()
                    102: {
                    103:        (void) fprintf(stderr, "usage: env [-i] [name=value ...] [command]\n");
                    104:        exit (1);
                    105: }