| File: | src/bin/pwd/pwd.c |
| Warning: | line 66, column 2 Value stored to 'argv' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | /* $OpenBSD: pwd.c,v 1.14 2015/10/09 01:37:06 deraadt Exp $ */ |
| 2 | /* $NetBSD: pwd.c,v 1.22 2011/08/29 14:51:19 joerg Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1991, 1993, 1994 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <sys/stat.h> |
| 34 | |
| 35 | #include <err.h> |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <unistd.h> |
| 39 | |
| 40 | extern char *__progname; |
| 41 | static char *getcwd_logical(void); |
| 42 | __dead__attribute__((__noreturn__)) static void usage(void); |
| 43 | |
| 44 | int |
| 45 | main(int argc, char *argv[]) |
| 46 | { |
| 47 | int ch, lFlag = 0; |
| 48 | const char *p; |
| 49 | |
| 50 | if (pledge("stdio rpath", NULL((void *)0)) == -1) |
| 51 | err(1, "pledge"); |
| 52 | |
| 53 | while ((ch = getopt(argc, argv, "LP")) != -1) { |
| 54 | switch (ch) { |
| 55 | case 'L': |
| 56 | lFlag = 1; |
| 57 | break; |
| 58 | case 'P': |
| 59 | lFlag = 0; |
| 60 | break; |
| 61 | default: |
| 62 | usage(); |
| 63 | } |
| 64 | } |
| 65 | argc -= optind; |
| 66 | argv += optind; |
Value stored to 'argv' is never read | |
| 67 | |
| 68 | if (argc != 0) |
| 69 | usage(); |
| 70 | |
| 71 | if (lFlag) |
| 72 | p = getcwd_logical(); |
| 73 | else |
| 74 | p = NULL((void *)0); |
| 75 | if (p == NULL((void *)0)) |
| 76 | p = getcwd(NULL((void *)0), 0); |
| 77 | |
| 78 | if (p == NULL((void *)0)) |
| 79 | err(EXIT_FAILURE1, NULL((void *)0)); |
| 80 | |
| 81 | puts(p); |
| 82 | |
| 83 | exit(EXIT_SUCCESS0); |
| 84 | } |
| 85 | |
| 86 | static char * |
| 87 | getcwd_logical(void) |
| 88 | { |
| 89 | char *pwd, *p; |
| 90 | struct stat s_pwd, s_dot; |
| 91 | |
| 92 | /* Check $PWD -- if it's right, it's fast. */ |
| 93 | pwd = getenv("PWD"); |
| 94 | if (pwd == NULL((void *)0)) |
| 95 | return NULL((void *)0); |
| 96 | if (pwd[0] != '/') |
| 97 | return NULL((void *)0); |
| 98 | |
| 99 | /* check for . or .. components, including trailing ones */ |
| 100 | for (p = pwd; *p != '\0'; p++) |
| 101 | if (p[0] == '/' && p[1] == '.') { |
| 102 | if (p[2] == '.') |
| 103 | p++; |
| 104 | if (p[2] == '\0' || p[2] == '/') |
| 105 | return NULL((void *)0); |
| 106 | } |
| 107 | |
| 108 | if (stat(pwd, &s_pwd) == -1 || stat(".", &s_dot) == -1) |
| 109 | return NULL((void *)0); |
| 110 | if (s_pwd.st_dev != s_dot.st_dev || s_pwd.st_ino != s_dot.st_ino) |
| 111 | return NULL((void *)0); |
| 112 | return pwd; |
| 113 | } |
| 114 | |
| 115 | static void |
| 116 | usage(void) |
| 117 | { |
| 118 | fprintf(stderr(&__sF[2]), "usage: %s [-LP]\n", __progname); |
| 119 | exit(EXIT_FAILURE1); |
| 120 | } |