File: | src/bin/pwd/pwd.c |
Warning: | line 66, column 2 Value stored to 'argv' is never read |
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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 | } |