/[imapfilter]/imapfilter/file.c
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Contents of /imapfilter/file.c

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Revision 1.22 - (show annotations)
Sat Oct 6 13:16:28 2001 UTC (22 years, 5 months ago) by lefcha
Branch: MAIN
Changes since 1.21: +2 -1 lines
File MIME type: text/plain
Added a forgotten check.

1 #include <stdio.h>
2 #include <errno.h>
3 #include <sys/types.h>
4 #include <regex.h>
5 #include <string.h>
6 #include <stdlib.h>
7 #include <limits.h>
8 #include <sys/stat.h>
9
10 #include "config.h"
11 #include "imapfilter.h"
12 #include "data.h"
13
14
15 extern char logfile[PATH_MAX];
16 extern unsigned int options;
17
18
19 /*
20 * Find the path to configuration file, open it and call parse_config().
21 */
22 int read_config(char *cfg)
23 {
24 int r;
25 FILE *fp;
26 char *home = NULL;
27
28 if (!cfg) {
29 cfg = (char *) xmalloc(PATH_MAX * sizeof(char));
30
31 home = getenv("HOME");
32
33 snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc");
34 }
35 #ifdef DEBUG
36 printf("debug: configuration file: '%s'\n", cfg);
37 #endif
38 #ifdef CHECK_PERMISSIONS
39 check_permissions(cfg);
40 #endif
41 fp = fopen(cfg, "r");
42
43 if (!fp)
44 fatal(ERROR_FILE_OPEN, "imapfilter: opening config file %s; %s\n",
45 cfg, strerror(errno));
46
47 if ((r = parse_config(fp)))
48 fatal(ERROR_CONFIG_PARSE,
49 "imapfilter: parse error in config file at row %d\n", r);
50
51 fclose(fp);
52
53 if (!cfg)
54 free(cfg);
55
56 #ifdef DEBUG
57 printf("debug: options: %0#10x\n", options);
58 #endif
59
60 return 0;
61 }
62
63
64 #ifdef CHECK_PERMISSIONS
65 /*
66 * Check the permissions of the configuration file.
67 */
68 int check_permissions(char *cfg)
69 {
70 struct stat fs;
71
72 if (stat(cfg, &fs)) {
73 error("imapfilter: getting file %s status; %s\n", cfg,
74 strerror(errno));
75 return ERROR_TRIVIAL;
76 }
77 if (!S_ISREG(fs.st_mode)) {
78 error("imapfilter: file %s not a regular file\n", cfg);
79 return ERROR_TRIVIAL;
80 }
81 if ((fs.st_mode & 00777) != (S_IRUSR | S_IWUSR)) {
82 error("imapfilter: warning: improper config file %s permissions\n"
83 "imapfilter: warning: file's mode should be 600 not %o\n",
84 cfg, fs.st_mode & 00777);
85 return ERROR_TRIVIAL;
86 }
87 return 0;
88 }
89 #endif
90
91 /*
92 * Parse configuration file.
93 */
94 int parse_config(FILE * fp)
95 {
96 int i, r = 0;
97 unsigned int row = 0;
98 char line[LINE_MAX];
99 regex_t creg[12];
100 regmatch_t match[7];
101 const char *reg[12] = {
102 "^([[:blank:]]*\n|#.*\n)$",
103 "^[[:blank:]]*ACCOUNT[[:blank:]]+([[:graph:]]*):([[:graph:]]*)@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*\n$",
104 "^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+([[:graph:]]+)[[:blank:]]*\n$",
105 "^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$",
106 "^[[:blank:]]*ACTION[[:blank:]]+(DELETE|COPY[[:blank:]]+([[:graph:]]+)|MOVE[[:blank:]]+([[:graph:]]+)|LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$",
107 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|UNANSWERED|UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$",
108 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",
109 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",
110 "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(LARGER|SMALLER)[[:blank:]]+([[:digit:]]+)[[:blank:]]*\n$",
111 "^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]*\n$",
112 "^[[:blank:]]*(LOGFILE)[[:blank:]]*=[[:blank:]]*([[:print:]]+)\n$",
113 "^[[:blank:]]*(HEADERS)[[:blank:]]*=[[:blank:]]*(YES|NO)[[:blank:]]*\n$"
114 };
115
116 for (i = 0; i < 12; i++)
117 regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE);
118
119 while (fgets(line, LINE_MAX - 1, fp)) {
120 row++;
121 if (!regexec(&creg[0], line, 0, match, 0))
122 continue;
123 else if (!regexec(&creg[1], line, 6, match, 0))
124 set_account(line, match);
125 else if (!regexec(&creg[2], line, 3, match, 0))
126 r = set_mboxgrp(line, match);
127 else if (!regexec(&creg[3], line, 3, match, 0))
128 r = set_filter(line, match);
129 else if (!regexec(&creg[4], line, 5, match, 0))
130 r = set_action(line, match);
131 else if (!regexec(&creg[5], line, 7, match, 0) ||
132 !regexec(&creg[6], line, 7, match, 0) ||
133 !regexec(&creg[7], line, 7, match, 0) ||
134 !regexec(&creg[8], line, 7, match, 0))
135 r = set_mask(line, match);
136 else if (!regexec(&creg[9], line, 3, match, 0))
137 r = set_job(line, match);
138 else if (!regexec(&creg[10], line, 3, match, 0) ||
139 !regexec(&creg[11], line, 3, match, 0))
140 set_options(line, match);
141 else
142 return row;
143
144 if (r == ERROR_CONFIG_PARSE)
145 return row;
146 }
147
148 for (i = 0; i < 12; i++)
149 regfree(&creg[i]);
150
151 destroy_data();
152
153 return 0;
154 }
155
156
157 /*
158 * Set other options found in config file.
159 */
160 void set_options(char *line, regmatch_t * match)
161 {
162 if (!strncasecmp(line + match[1].rm_so, "logfile", 7)) {
163 if (!*logfile)
164 strncat(logfile, line + match[2].rm_so,
165 min((match[2].rm_eo - match[2].rm_so), PATH_MAX - 1));
166 } else {
167 if (!strncasecmp(line + match[2].rm_so, "yes", 3))
168 options |= OPTION_HEADERS;
169 else if (options & OPTION_HEADERS)
170 options ^= OPTION_HEADERS;
171 }
172 }

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