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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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|
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if (!cfg) { |
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cfg = (char *) malloc(PATH_MAX * sizeof(char)); |
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|
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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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error("imapfilter: opening config file %s; %s\n", |
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cfg, strerror(errno)); |
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return 1; |
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} |
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|
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r = parse_config(fp); |
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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 r; |
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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 1; |
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} |
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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 1; |
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} |
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|
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if ((fs.st_mode & 00777) != (S_IRUSR | S_IWUSR)) { |
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fprintf(stderr, |
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"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 1; |
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} |
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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; |
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unsigned int row = 0; |
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char line[LINE_MAX]; |
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regex_t creg[11]; |
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regmatch_t match[7]; |
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const char *reg[11] = { |
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"^([[:blank:]]*\n|#.*\n)$", |
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"^[[:blank:]]*ACCOUNT[[:blank:]]+([[:graph:]]*):([[:graph:]]*)@([[:alnum:].-]+):?([[:digit:]]{0,5})[[:blank:]]*\n$", |
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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|MOVE|LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(ALL|ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|UNANSWERED|UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$", |
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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:]]+)\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*(HEADER)[[:blank:]]+([[:graph:]]+)[[:blank:]]+([[:print:]]+)\n$", |
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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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}; |
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|
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for (i = 0; i < 11; 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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set_mboxgrp(line, match); |
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else if (!regexec(&creg[3], line, 3, match, 0)) |
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set_filter(line, match); |
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else if (!regexec(&creg[4], line, 3, match, 0)) |
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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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set_mask(line, match); |
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else if (!regexec(&creg[9], line, 3, match, 0)) |
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set_job(line, match); |
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else if (!regexec(&creg[10], line, 2, match, 0)) |
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set_options(line, match); |
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else { |
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error("imapfilter: parse error in config file at row %d\n", |
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row); |
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return 1; |
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} |
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} |
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|
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for (i = 0; i < 11; 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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int s; |
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|
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if (!*logfile) { |
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s = min((match[1].rm_eo - match[1].rm_so), PATH_MAX - 1); |
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strncpy(logfile, line + match[1].rm_so, s); |
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logfile[s] = 0; |
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} |
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} |
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