File: | src/usr.bin/from/from.c |
Warning: | line 96, column 21 Although the value stored to 'linelen' is used in the enclosing expression, the value is never actually read from 'linelen' |
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1 | /* $OpenBSD: from.c,v 1.28 2021/07/12 15:09:19 beck Exp $ */ |
2 | /* $NetBSD: from.c,v 1.6 1995/09/01 01:39:10 jtc Exp $ */ |
3 | |
4 | /* |
5 | * Copyright (c) 1980, 1988, 1993 |
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/types.h> |
34 | #include <ctype.h> |
35 | #include <pwd.h> |
36 | #include <stdio.h> |
37 | #include <stdlib.h> |
38 | #include <unistd.h> |
39 | #include <paths.h> |
40 | #include <string.h> |
41 | #include <err.h> |
42 | #include <errno(*__errno()).h> |
43 | |
44 | int match(char *, char *); |
45 | char *mail_spool(char *file, const char *user); |
46 | |
47 | int |
48 | main(int argc, char *argv[]) |
49 | { |
50 | int ch, newline, fflag = 0; |
51 | char *file, *line, *sender, *p; |
52 | size_t linesize = 0; |
53 | ssize_t linelen; |
54 | FILE *fp; |
55 | |
56 | file = line = sender = NULL((void *)0); |
57 | while ((ch = getopt(argc, argv, "f:s:")) != -1) { |
58 | switch(ch) { |
59 | case 'f': |
60 | fflag = 1; |
61 | file = optarg; |
62 | break; |
63 | case 's': |
64 | sender = optarg; |
65 | for (p = sender; *p; ++p) |
66 | if (isupper((unsigned char)*p)) |
67 | *p = tolower((unsigned char)*p); |
68 | break; |
69 | default: |
70 | fprintf(stderr(&__sF[2]), |
71 | "usage: from [-f file] [-s sender] [user]\n"); |
72 | exit(EXIT_FAILURE1); |
73 | } |
74 | } |
75 | argv += optind; |
76 | |
77 | if (pledge("stdio unveil rpath getpw", NULL((void *)0)) == -1) |
78 | err(1, "pledge"); |
79 | |
80 | file = mail_spool(file, *argv); |
81 | |
82 | if (unveil(file, "r") == -1) |
83 | err(1, "unveil %s", file); |
84 | if (pledge("stdio rpath", NULL((void *)0)) == -1) |
85 | err(1, "pledge"); |
86 | |
87 | if ((fp = fopen(file, "r")) == NULL((void *)0)) { |
88 | if (!fflag && errno(*__errno()) == ENOENT2) |
89 | exit(EXIT_SUCCESS0); |
90 | err(1, "%s", file); |
91 | } |
92 | |
93 | if (pledge("stdio", NULL((void *)0)) == -1) |
94 | err(1, "pledge"); |
95 | |
96 | for (newline = 1; (linelen = getline(&line, &linesize, fp)) != -1;) { |
Although the value stored to 'linelen' is used in the enclosing expression, the value is never actually read from 'linelen' | |
97 | if (*line == '\n') { |
98 | newline = 1; |
99 | continue; |
100 | } |
101 | if (newline && !strncmp(line, "From ", 5) && |
102 | (!sender || match(line + 5, sender))) |
103 | printf("%s", line); |
104 | newline = 0; |
105 | } |
106 | free(line); |
107 | if (ferror(fp)(!__isthreaded ? (((fp)->_flags & 0x0040) != 0) : (ferror )(fp))) |
108 | err(EXIT_FAILURE1, "getline"); |
109 | fclose(fp); |
110 | exit(EXIT_SUCCESS0); |
111 | } |
112 | |
113 | char * |
114 | mail_spool(char *file, const char *user) |
115 | { |
116 | struct passwd *pwd; |
117 | |
118 | /* |
119 | * We find the mailbox by: |
120 | * 1 -f flag |
121 | * 2 _PATH_MAILDIR/user (from argv) |
122 | * 2 MAIL environment variable |
123 | * 3 _PATH_MAILDIR/user (from environment or passwd db) |
124 | */ |
125 | if (file == NULL((void *)0)) { |
126 | if (user == NULL((void *)0)) { |
127 | if ((file = getenv("MAIL")) == NULL((void *)0)) { |
128 | if ((user = getenv("LOGNAME")) == NULL((void *)0) && |
129 | (user = getenv("USER")) == NULL((void *)0)) { |
130 | if (!(pwd = getpwuid(getuid()))) |
131 | errx(1, "no password file " |
132 | "entry for you"); |
133 | user = pwd->pw_name; |
134 | } |
135 | } |
136 | } |
137 | if (file == NULL((void *)0)) { |
138 | if (asprintf(&file, "%s/%s", _PATH_MAILDIR"/var/mail", user) == -1) |
139 | err(1, NULL((void *)0)); |
140 | } |
141 | } |
142 | return(file); |
143 | } |
144 | |
145 | int |
146 | match(char *line, char *sender) |
147 | { |
148 | char ch, pch, first, *p, *t; |
149 | |
150 | for (first = *sender++;;) { |
151 | if (isspace((unsigned char)(ch = *line))) |
152 | return(0); |
153 | ++line; |
154 | if (isupper((unsigned char)ch)) |
155 | ch = tolower((unsigned char)ch); |
156 | if (ch != first) |
157 | continue; |
158 | for (p = sender, t = line;;) { |
159 | if (!(pch = *p++)) |
160 | return(1); |
161 | if (isupper((unsigned char)(ch = *t++))) |
162 | ch = tolower((unsigned char)ch); |
163 | if (ch != pch) |
164 | break; |
165 | } |
166 | } |
167 | /* NOTREACHED */ |
168 | } |