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Annotation of src/usr.bin/env/env.c, Revision 1.16

1.16    ! deraadt     1: /*     $OpenBSD: env.c,v 1.15 2014/03/08 00:09:20 schwarze Exp $       */
1.3       deraadt     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.
1.9       millert    15:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
                     31:
                     32: #include <err.h>
1.11      ray        33: #include <errno.h>
                     34: #include <locale.h>
1.1       deraadt    35: #include <stdio.h>
1.11      ray        36: #include <stdlib.h>
1.1       deraadt    37: #include <string.h>
                     38: #include <unistd.h>
                     39:
1.11      ray        40: __dead void usage(void);
1.1       deraadt    41:
                     42: int
1.10      deraadt    43: main(int argc, char *argv[])
1.1       deraadt    44: {
                     45:        extern char **environ;
1.2       deraadt    46:        extern int optind;
1.1       deraadt    47:        char **ep, *p;
                     48:        int ch;
                     49:
                     50:        setlocale(LC_ALL, "");
1.16    ! deraadt    51:
        !            52:        if (pledge("stdio exec", NULL) == -1)
        !            53:                err(1, "pledge");
1.1       deraadt    54:
1.12      ray        55:        while ((ch = getopt(argc, argv, "i-")) != -1)
1.11      ray        56:                switch(ch) {
1.12      ray        57:                case '-':                       /* obsolete */
1.1       deraadt    58:                case 'i':
1.11      ray        59:                        if ((environ = calloc(1, sizeof(char *))) == NULL)
1.5       deraadt    60:                                err(126, "calloc");
1.1       deraadt    61:                        break;
                     62:                default:
                     63:                        usage();
                     64:                }
1.11      ray        65:        argc -= optind;
                     66:        argv += optind;
1.1       deraadt    67:
1.13      millert    68:        for (; *argv && (p = strchr(*argv, '=')); ++argv) {
                     69:                *p++ = '\0';
                     70:                if (setenv(*argv, p, 1) == -1) {
1.5       deraadt    71:                        /* reuse 126, it matches the problem most */
1.15      schwarze   72:                        err(126, "setenv");
1.5       deraadt    73:                }
1.13      millert    74:        }
1.1       deraadt    75:
                     76:        if (*argv) {
1.5       deraadt    77:                /*
                     78:                 * return 127 if the command to be run could not be
                     79:                 * found; 126 if the command was found but could
                     80:                 * not be invoked
                     81:                 */
1.1       deraadt    82:                execvp(*argv, argv);
                     83:                err((errno == ENOENT) ? 127 : 126, "%s", *argv);
                     84:        }
                     85:
                     86:        for (ep = environ; *ep; ep++)
                     87:                (void)printf("%s\n", *ep);
                     88:
                     89:        exit(0);
                     90: }
                     91:
1.5       deraadt    92: void
1.10      deraadt    93: usage(void)
1.1       deraadt    94: {
1.11      ray        95:        extern char *__progname;
                     96:
                     97:        (void)fprintf(stderr, "usage: %s [-i] [name=value ...] "
                     98:            "[utility [argument ...]]\n", __progname);
                     99:        exit(1);
1.1       deraadt   100: }