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#include <stdio.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <regex.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <limits.h> |
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#include <sys/stat.h> |
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|
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#include "config.h" |
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#include "imapfilter.h" |
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#include "data.h" |
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|
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|
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extern char logfile[PATH_MAX]; |
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extern unsigned int options; |
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|
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|
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/* |
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* Find the path to configuration file, open it and call parse_config(). |
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*/ |
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int read_config(char *cfg) |
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{ |
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int r; |
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FILE *fp; |
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char *home = NULL; |
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char *c = NULL; |
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|
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if (!cfg) { |
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cfg = c = (char *) xmalloc(PATH_MAX * sizeof(char)); |
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|
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home = getenv("HOME"); |
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|
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snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc"); |
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} |
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#ifdef DEBUG |
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printf("debug: configuration file: '%s'\n", cfg); |
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#endif |
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#ifdef CHECK_PERMISSIONS |
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check_permissions(cfg); |
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#endif |
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fp = fopen(cfg, "r"); |
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|
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if (!fp) |
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fatal(ERROR_FILE_OPEN, "imapfilter: opening config file %s; %s\n", |
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cfg, strerror(errno)); |
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|
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if (c) |
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free(c); |
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|
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if ((r = parse_config(fp))) |
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fatal(ERROR_CONFIG_PARSE, |
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"imapfilter: parse error in config file at row %d\n", r); |
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|
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fclose(fp); |
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|
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#ifdef DEBUG |
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printf("debug: options: %0#10x\n", options); |
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#endif |
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|
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return 0; |
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} |
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|
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|
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#ifdef CHECK_PERMISSIONS |
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/* |
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* Check the permissions of the configuration file. |
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*/ |
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int check_permissions(char *cfg) |
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{ |
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struct stat fs; |
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|
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if (stat(cfg, &fs)) { |
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error("imapfilter: getting file %s status; %s\n", cfg, |
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strerror(errno)); |
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return ERROR_TRIVIAL; |
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} |
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if (!S_ISREG(fs.st_mode)) { |
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error("imapfilter: file %s not a regular file\n", cfg); |
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return ERROR_TRIVIAL; |
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} |
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if ((fs.st_mode & 00777) != (S_IRUSR | S_IWUSR)) { |
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error("imapfilter: warning: improper config file %s permissions\n" |
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"imapfilter: warning: file's mode should be 600 not %o\n", |
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cfg, fs.st_mode & 00777); |
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return ERROR_TRIVIAL; |
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} |
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return 0; |
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} |
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#endif |
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|
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/* |
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* Parse configuration file. |
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*/ |
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int parse_config(FILE * fp) |
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{ |
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int i, r = 0; |
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unsigned int row = 0; |
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char line[LINE_MAX]; |
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regex_t creg[12]; |
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regmatch_t match[7]; |
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const char *reg[12] = { |
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"^([[:blank:]]*\n|#.*\n)$", |
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"^[[:blank:]]*ACCOUNT[[:blank:]]+([[:graph:]]*):([[:graph:]]*)@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*\n$", |
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"^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+([[:graph:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$", |
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"^[[:blank:]]*ACTION[[:blank:]]+(DELETE|COPY[[:blank:]]+([[:graph:]]+)|MOVE[[:blank:]]+([[:graph:]]+)|LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|UNANSWERED|UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(LARGER|SMALLER)[[:blank:]]+([[:digit:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*(LOGFILE)[[:blank:]]*=[[:blank:]]*([[:print:]]+)\n$", |
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"^[[:blank:]]*(HEADERS)[[:blank:]]*=[[:blank:]]*(YES|NO)[[:blank:]]*\n$" |
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}; |
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|
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for (i = 0; i < 12; i++) |
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regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE); |
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|
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while (fgets(line, LINE_MAX - 1, fp)) { |
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row++; |
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if (!regexec(&creg[0], line, 0, match, 0)) |
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continue; |
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else if (!regexec(&creg[1], line, 6, match, 0)) |
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set_account(line, match); |
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else if (!regexec(&creg[2], line, 3, match, 0)) |
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r = set_mboxgrp(line, match); |
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else if (!regexec(&creg[3], line, 3, match, 0)) |
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r = set_filter(line, match); |
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else if (!regexec(&creg[4], line, 5, match, 0)) |
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r = set_action(line, match); |
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else if (!regexec(&creg[5], line, 7, match, 0) || |
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!regexec(&creg[6], line, 7, match, 0) || |
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!regexec(&creg[7], line, 7, match, 0) || |
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!regexec(&creg[8], line, 7, match, 0)) |
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r = set_mask(line, match); |
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else if (!regexec(&creg[9], line, 3, match, 0)) |
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r = set_job(line, match); |
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else if (!regexec(&creg[10], line, 3, match, 0) || |
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!regexec(&creg[11], line, 3, match, 0)) |
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set_options(line, match); |
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else |
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return row; |
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|
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if (r == ERROR_CONFIG_PARSE) |
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return row; |
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} |
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|
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for (i = 0; i < 12; i++) |
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regfree(&creg[i]); |
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|
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destroy_data(); |
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|
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return 0; |
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} |
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|
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|
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/* |
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* Set other options found in config file. |
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*/ |
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void set_options(char *line, regmatch_t * match) |
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{ |
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if (!strncasecmp(line + match[1].rm_so, "logfile", 7)) { |
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if (!*logfile) |
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strncat(logfile, line + match[2].rm_so, |
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min((match[2].rm_eo - match[2].rm_so), PATH_MAX - 1)); |
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} else { |
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if (!strncasecmp(line + match[2].rm_so, "yes", 3)) |
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options |= OPTION_HEADERS; |
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else if (options & OPTION_HEADERS) |
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options ^= OPTION_HEADERS; |
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} |
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} |