| File: | src/usr.bin/env/env.c |
| Warning: | line 62, column 2 Value stored to 'argc' is never read |
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| 1 | /* $OpenBSD: env.c,v 1.17 2016/10/28 07:22:59 schwarze Exp $ */ |
| 2 | |
| 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. Neither the name of the University nor the names of its contributors |
| 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> |
| 33 | #include <errno(*__errno()).h> |
| 34 | #include <stdio.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <string.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | static void __dead__attribute__((__noreturn__)) usage(void); |
| 40 | |
| 41 | int |
| 42 | main(int argc, char *argv[]) |
| 43 | { |
| 44 | extern char **environ; |
| 45 | extern int optind; |
| 46 | char **ep, *p; |
| 47 | int ch; |
| 48 | |
| 49 | if (pledge("stdio exec", NULL((void *)0)) == -1) |
| 50 | err(1, "pledge"); |
| 51 | |
| 52 | while ((ch = getopt(argc, argv, "i-")) != -1) |
| 53 | switch(ch) { |
| 54 | case '-': /* obsolete */ |
| 55 | case 'i': |
| 56 | if ((environ = calloc(1, sizeof(char *))) == NULL((void *)0)) |
| 57 | err(126, "calloc"); |
| 58 | break; |
| 59 | default: |
| 60 | usage(); |
| 61 | } |
| 62 | argc -= optind; |
Value stored to 'argc' is never read | |
| 63 | argv += optind; |
| 64 | |
| 65 | for (; *argv && (p = strchr(*argv, '=')); ++argv) { |
| 66 | *p++ = '\0'; |
| 67 | if (setenv(*argv, p, 1) == -1) { |
| 68 | /* reuse 126, it matches the problem most */ |
| 69 | err(126, "setenv"); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | if (*argv) { |
| 74 | /* |
| 75 | * return 127 if the command to be run could not be |
| 76 | * found; 126 if the command was found but could |
| 77 | * not be invoked |
| 78 | */ |
| 79 | execvp(*argv, argv); |
| 80 | err((errno(*__errno()) == ENOENT2) ? 127 : 126, "%s", *argv); |
| 81 | } |
| 82 | |
| 83 | for (ep = environ; *ep; ep++) |
| 84 | (void)printf("%s\n", *ep); |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static void __dead__attribute__((__noreturn__)) |
| 90 | usage(void) |
| 91 | { |
| 92 | extern char *__progname; |
| 93 | |
| 94 | (void)fprintf(stderr(&__sF[2]), "usage: %s [-i] [name=value ...] " |
| 95 | "[utility [argument ...]]\n", __progname); |
| 96 | exit(1); |
| 97 | } |