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#include <stdio.h> |
#include <stdio.h> |
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#include <unistd.h> |
#include <unistd.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> |
#include <string.h> |
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#include <stdlib.h> |
#include <errno.h> |
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#include <limits.h> |
#include <limits.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
#include <sys/stat.h> |
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#include <fcntl.h> |
#include <fcntl.h> |
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#include <time.h> |
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#include "config.h" |
#include "config.h" |
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#include "imapfilter.h" |
#include "imapfilter.h" |
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#include "data.h" |
#include "pathnames.h" |
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extern char logfile[PATH_MAX]; |
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extern unsigned int options; |
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extern unsigned int flags; |
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extern unsigned int interval; |
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extern long timeout; |
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extern char *home; |
extern char *home; |
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extern options_t opts; |
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#ifdef ENCRYPTED_PASSWORDS |
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char *passphr; /* Master password to access the passwords |
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file. */ |
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#endif |
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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 *fd; |
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char *c = NULL; |
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if (!cfg) { |
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cfg = c = (char *)xmalloc(PATH_MAX * sizeof(char)); |
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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_file_perms(cfg, S_IRUSR | S_IWUSR); |
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#endif |
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fd = fopen(cfg, "r"); |
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if (!fd) |
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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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if (c) |
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xfree(c); |
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if ((r = parse_config(fd))) |
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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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fclose(fd); |
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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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return 0; |
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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 * fd) |
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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[13]; |
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regmatch_t match[11]; |
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const char *reg[13] = { |
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"^([[:blank:]]*\n|#.*\n)$", |
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"^[[:blank:]]*ACCOUNT[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
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"(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@([[:alnum:].-]+)" |
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"(:[[:digit:]]+)?[[:blank:]]*([[:blank:]]SSL|[[:blank:]]SSL2|" |
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"[[:blank:]]SSL3|[[:blank:]]TLS1)?[[:blank:]]*\n$", |
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"^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
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"([[:print:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*" |
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"([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$", |
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"^[[:blank:]]*ACTION[[:blank:]]+(DELETE|" |
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"COPY[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|" |
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"MOVE[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|" |
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"RCOPY[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
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"(\"[[:print:]]*\"|[[:graph:]]+)|" |
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"RMOVE[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
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"(\"[[:print:]]*\"|[[:graph:]]+)|" |
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"FLAG[[:blank:]]+(REPLACE|ADD|REMOVE)[[:blank:]]+" |
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"([[:alpha:],]+)|" |
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"LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
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"(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|UNANSWERED|" |
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"UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
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"(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+(\"[[:print:]]*\"|" |
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"[[:graph:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
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"(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]+" |
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"(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
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"(LARGER|SMALLER|OLDER|NEWER)[[:blank:]]+([[:digit:]]+)" |
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"[[:blank:]]*\n$", |
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"^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+" |
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"([[:alnum:],_-]+)[[:blank:]]*\n$", |
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"^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(LOGFILE)" |
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"[[:blank:]]*=[[:blank:]]*([[:print:]]+)\n$", |
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"^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(ERRORS|EXPUNGE|HEADERS|" |
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"NAMESPACE|SUBSCRIBE|WARNING)[[:blank:]]*=[[:blank:]]*(YES|NO)" |
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"[[:blank:]]*\n$", |
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"^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(DAEMON|TIMEOUT)" |
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"[[:blank:]]*=[[:blank:]]*([[:digit:]]+)\n$" |
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}; |
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for (i = 0; i < 13; i++) |
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regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE); |
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/* First process all the variables. This is done because some variables' |
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arguments are used before the other commands are processed. */ |
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while (fgets(line, LINE_MAX - 1, fd)) |
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if (!regexec(&creg[10], line, 4, match, 0) || |
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!regexec(&creg[11], line, 4, match, 0) || |
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!regexec(&creg[12], line, 4, match, 0)) |
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set_options(line, match); |
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/* Then rewind and process everything else. */ |
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fseek(fd, 0L, SEEK_SET); |
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while (fgets(line, LINE_MAX - 1, fd)) { |
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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, 9, 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, 11, match, 0)) |
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r = set_action(line, match); |
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else if (!regexec(&creg[5], line, 5, match, 0)) |
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r = set_mask(line, match, MASK_MATCH_1); |
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else if (!regexec(&creg[6], line, 6, match, 0)) |
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r = set_mask(line, match, MASK_MATCH_2); |
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else if (!regexec(&creg[7], line, 7, match, 0)) |
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r = set_mask(line, match, MASK_MATCH_3); |
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else if (!regexec(&creg[8], line, 6, match, 0)) |
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r = set_mask(line, match, MASK_MATCH_4); |
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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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/* Skip variable processing. */ |
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else if (!regexec(&creg[10], line, 4, match, 0) || |
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!regexec(&creg[11], line, 4, match, 0) || |
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!regexec(&creg[12], line, 4, match, 0)); |
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else |
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return row; |
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if (r == ERROR_CONFIG_PARSE) |
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return row; |
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} |
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for (i = 0; i < 13; i++) |
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regfree(&creg[i]); |
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destroy_data(); |
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return 0; |
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} |
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/* |
/* |
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* Set other options found in config file. |
* Create imapfilter's home directory. |
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*/ |
*/ |
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void set_options(char *line, regmatch_t * match) |
int |
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create_homedir(void) |
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{ |
{ |
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if (!strncasecmp(line + match[2].rm_so, "logfile", 7)) { |
char hd[PATH_MAX]; |
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if (!*logfile) |
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strncat(logfile, line + match[3].rm_so, |
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min((match[3].rm_eo - match[3].rm_so), PATH_MAX - 1)); |
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} else if (!strncasecmp(line + match[2].rm_so, "errors", 6)) { |
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if (!strncasecmp(line + match[3].rm_so, "yes", 3)) |
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options |= OPTION_ERRORS; |
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else |
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options &= ~(OPTION_ERRORS); |
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} else if (!strncasecmp(line + match[2].rm_so, "expunge", 7)) { |
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if (!strncasecmp(line + match[3].rm_so, "yes", 3)) |
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options |= OPTION_EXPUNGE; |
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else |
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options &= ~(OPTION_EXPUNGE); |
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} else if (!strncasecmp(line + match[2].rm_so, "header", 6)) { |
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if (!strncasecmp(line + match[3].rm_so, "yes", 3)) |
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options |= OPTION_HEADERS; |
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else |
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options &= ~(OPTION_HEADERS); |
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} else if (!strncasecmp(line + match[2].rm_so, "namespace", 9)) { |
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if (!strncasecmp(line + match[3].rm_so, "yes", 3)) |
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options |= OPTION_NAMESPACE; |
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else |
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options &= ~(OPTION_NAMESPACE); |
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} else if (!strncasecmp(line + match[2].rm_so, "subscribe", 9)) { |
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if (!strncasecmp(line + match[3].rm_so, "yes", 3)) |
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options |= OPTION_SUBSCRIBE; |
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else |
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options &= ~(OPTION_SUBSCRIBE); |
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} else if (!strncasecmp(line + match[2].rm_so, "warning", 7)) { |
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if (!strncasecmp(line + match[3].rm_so, "yes", 3)) |
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options |= OPTION_WARNING; |
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else |
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options &= ~(OPTION_WARNING); |
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} else if (!strncasecmp(line + match[2].rm_so, "timeout", 7)) { |
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errno = 0; |
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timeout = strtol(line + match[3].rm_so, NULL, 10); |
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if (errno) |
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timeout = 0; |
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} else if (!strncasecmp(line + match[2].rm_so, "daemon", 6) && |
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!(options & OPTION_DAEMON_MODE)) { |
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options |= OPTION_DAEMON_MODE; |
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errno = 0; |
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interval = strtoul(line + match[3].rm_so, NULL, 10); |
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if (errno) |
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interval = 0; |
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} |
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} |
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#ifdef ENCRYPTED_PASSWORDS |
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/* |
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* Open password file and call parse_passwords(). |
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*/ |
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int read_passwords(void) |
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{ |
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FILE *fd; |
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char pwfile[PATH_MAX]; |
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if (!(flags & FLAG_BLANK_PASSWORD)) |
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return ERROR_CONFIG_PARSE; |
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passphr = (char *)smalloc(PASSPHRASE_LEN); |
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*passphr = 0; |
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snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords"); |
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#ifdef DEBUG |
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printf("debug: passwords file: '%s'\n", pwfile); |
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#endif |
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if (!exists_file(pwfile)) |
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return ERROR_FILE_OPEN; |
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#ifdef CHECK_PERMISSIONS |
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check_file_perms(pwfile, S_IRUSR | S_IWUSR); |
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#endif |
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fd = fopen(pwfile, "r"); |
snprintf(hd, PATH_MAX, "%s/%s", home, PATHNAME_HOME); |
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if (!fd) |
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fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n", |
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pwfile, strerror(errno)); |
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parse_passwords(fd); |
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fclose(fd); |
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return 0; |
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} |
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/* |
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* Parse unencrypted password file. |
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*/ |
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int parse_passwords(FILE * fd) |
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{ |
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int t = 3; |
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char *pe = NULL; |
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char user[USERNAME_LEN], serv[SERVER_LEN]; |
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unsigned char *buf; |
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char *c, *cp, *line; |
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regex_t creg; |
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regmatch_t match[4]; |
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const char *reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)"; |
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int r; |
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do { |
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fseek(fd, 0L, SEEK_SET); |
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printf("Enter master passphrase: "); |
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get_password(passphr, PASSPHRASE_LEN); |
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} while ((r = decrypt_passwords(&buf, fd)) && --t); |
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if (!t) |
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return ERROR_PASSPHRASE; |
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c = cp = sstrdup(buf); |
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regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
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line = strtok_r(c, "\n", &c); |
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while (line && !regexec(&creg, line, 4, match, 0)) { |
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user[0] = serv[0] = 0; |
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strncat(serv, line + match[1].rm_so, |
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min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1)); |
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strncat(user, line + match[2].rm_so, |
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min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1)); |
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if ((pe = (char *)find_password(user, serv))) |
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strncat(pe, line + match[3].rm_so, |
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min(match[3].rm_eo - match[3].rm_so, PASSWORD_LEN - 1)); |
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line = strtok_r(NULL, "\n", &c); |
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} |
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regfree(&creg); |
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sfree(cp); |
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sfree(buf); |
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return 0; |
if (!exists_dir(hd)) { |
30 |
} |
if (mkdir(hd, S_IRUSR | S_IWUSR | S_IXUSR)) |
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error("could not create directory %s; %s\n", hd, |
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strerror(errno)); |
33 |
/* |
} else { |
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* Store encrypted passwords to file. |
check_dir_perms(hd, S_IRUSR | S_IWUSR | S_IXUSR); |
35 |
*/ |
} |
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int store_passwords(account_t * accts[]) |
return 0; |
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{ |
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char pwfile[PATH_MAX]; |
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FILE *fd; |
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snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords"); |
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create_file(pwfile, S_IRUSR | S_IWUSR); |
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fd = fopen(pwfile, "w"); |
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if (!fd) |
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fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n", |
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pwfile, strerror(errno)); |
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encrypt_passwords(fd, accts); |
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fclose(fd); |
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return 0; |
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} |
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#endif |
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/* |
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* Create $HOME/.imapfilter directory. |
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*/ |
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int create_homedir(void) |
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{ |
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char *hdn = ".imapfilter"; |
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if (home) |
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if (chdir(home)) |
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error("imapfilter: could not change directory; %s\n", |
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strerror(errno)); |
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if (!exists_dir(hdn)) |
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if (mkdir(hdn, S_IRUSR | S_IWUSR | S_IXUSR)) |
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error("imapfilter: could not create directory %s; %s\n", hdn, |
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strerror(errno)); |
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return 0; |
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37 |
} |
} |
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39 |
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40 |
/* |
/* |
41 |
* Check if a file exists. |
* Check if a file exists. |
42 |
*/ |
*/ |
43 |
int exists_file(char *fname) |
int |
44 |
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exists_file(char *fname) |
45 |
{ |
{ |
46 |
struct stat fs; |
struct stat fs; |
47 |
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48 |
if (access(fname, F_OK)) |
if (access(fname, F_OK)) |
49 |
return 0; |
return 0; |
50 |
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51 |
stat(fname, &fs); |
stat(fname, &fs); |
52 |
if (!S_ISREG(fs.st_mode)) { |
if (!S_ISREG(fs.st_mode)) { |
53 |
error("imapfilter: file %s not a regular file\n", fname); |
error("file %s not a regular file\n", fname); |
54 |
return ERROR_FILE_OPEN; |
return ERROR_FILEOPEN; |
55 |
} |
} |
56 |
return 1; |
return 1; |
57 |
} |
} |
58 |
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59 |
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|
60 |
/* |
/* |
61 |
* Check if a directory exists. |
* Check if a directory exists. |
62 |
*/ |
*/ |
63 |
int exists_dir(char *dname) |
int |
64 |
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exists_dir(char *dname) |
65 |
{ |
{ |
66 |
struct stat ds; |
struct stat ds; |
67 |
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|
68 |
if (access(dname, F_OK)) |
if (access(dname, F_OK)) |
69 |
return 0; |
return 0; |
70 |
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|
71 |
stat(dname, &ds); |
stat(dname, &ds); |
72 |
if (!S_ISDIR(ds.st_mode)) { |
if (!S_ISDIR(ds.st_mode)) { |
73 |
error("imapfilter: file %s not a directory\n", dname); |
error("file %s not a directory\n", dname); |
74 |
return ERROR_FILE_OPEN; |
return ERROR_FILEOPEN; |
75 |
} |
} |
76 |
return 1; |
return 1; |
77 |
} |
} |
78 |
|
|
79 |
|
|
80 |
/* |
/* |
81 |
* Create a file with the specified permissions. |
* Create a file with the specified permissions. |
82 |
*/ |
*/ |
83 |
int create_file(char *fname, mode_t mode) |
int |
84 |
|
create_file(char *fname, mode_t mode) |
85 |
{ |
{ |
86 |
int fd = 0; |
int fd; |
87 |
|
|
88 |
|
fd = 0; |
89 |
|
|
90 |
if (!exists_file(fname)) { |
if (!exists_file(fname)) { |
91 |
fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode); |
fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode); |
92 |
if (fd == -1) { |
if (fd == -1) { |
93 |
error("imapfilter: could not create file %s; %s\n", fname, |
error("could not create file %s; %s\n", fname, |
94 |
strerror(errno)); |
strerror(errno)); |
95 |
return ERROR_FILE_OPEN; |
return ERROR_FILEOPEN; |
96 |
|
} |
97 |
|
close(fd); |
98 |
} |
} |
99 |
close(fd); |
return 0; |
|
} |
|
|
return 0; |
|
100 |
} |
} |
101 |
|
|
102 |
|
|
|
#ifdef CHECK_PERMISSIONS |
|
103 |
/* |
/* |
104 |
* Check the permissions of a file. |
* Check the permissions of a file. |
105 |
*/ |
*/ |
106 |
int check_file_perms(char *fname, mode_t mode) |
int |
107 |
|
check_file_perms(char *fname, mode_t mode) |
108 |
{ |
{ |
109 |
struct stat fs; |
struct stat fs; |
110 |
|
|
111 |
|
if (opts.verbosity <= -1) |
112 |
|
return 0; |
113 |
|
|
114 |
if (stat(fname, &fs)) { |
if (stat(fname, &fs)) { |
115 |
error("imapfilter: getting file %s status; %s\n", fname, |
error("getting file %s status; %s\n", fname, |
116 |
strerror(errno)); |
strerror(errno)); |
117 |
return ERROR_TRIVIAL; |
return ERROR_TRIVIAL; |
118 |
} |
} |
119 |
if (!S_ISREG(fs.st_mode)) { |
if (!S_ISREG(fs.st_mode)) { |
120 |
error("imapfilter: file %s not a regular file\n", fname); |
error("file %s not a regular file\n", fname); |
121 |
return ERROR_TRIVIAL; |
return ERROR_TRIVIAL; |
122 |
} |
} |
123 |
if ((fs.st_mode & 00777) != mode) { |
if ((fs.st_mode & 00777) != mode) { |
124 |
error("imapfilter: warning: improper file %s permissions\n" |
error("warning: file's %s mode should be %o not %o\n", fname, |
125 |
"imapfilter: warning: file's mode should be %o not %o\n", |
mode, fs.st_mode & 00777); |
126 |
fname, mode, fs.st_mode & 00777); |
return ERROR_TRIVIAL; |
127 |
return ERROR_TRIVIAL; |
} |
128 |
} |
return 0; |
|
return 0; |
|
129 |
} |
} |
130 |
|
|
131 |
|
|
132 |
/* |
/* |
133 |
* Check the permissions of a directory. |
* Check the permissions of a directory. |
134 |
*/ |
*/ |
135 |
int check_dir_perms(char *dname, mode_t mode) |
int |
136 |
|
check_dir_perms(char *dname, mode_t mode) |
137 |
{ |
{ |
138 |
struct stat ds; |
struct stat ds; |
139 |
|
|
140 |
if (stat(dname, &ds)) { |
if (opts.verbosity <= -1) |
141 |
error("imapfilter: getting file %s status; %s\n", dname, |
return 0; |
|
strerror(errno)); |
|
|
return ERROR_TRIVIAL; |
|
|
} |
|
|
if (!S_ISDIR(ds.st_mode)) { |
|
|
error("imapfilter: file %s not a directory\n", dname); |
|
|
return ERROR_TRIVIAL; |
|
|
} |
|
|
if ((ds.st_mode & 00777) != mode) { |
|
|
error("imapfilter: warning: improper dir %s permissions\n" |
|
|
"imapfilter: warning: file's mode should be %o not %o\n", |
|
|
dname, mode, ds.st_mode & 00777); |
|
|
return ERROR_TRIVIAL; |
|
|
} |
|
|
return 0; |
|
|
} |
|
142 |
|
|
143 |
#endif |
if (stat(dname, &ds)) { |
144 |
|
error("getting file %s status; %s\n", dname, |
145 |
|
strerror(errno)); |
146 |
|
return ERROR_TRIVIAL; |
147 |
|
} |
148 |
|
if (!S_ISDIR(ds.st_mode)) { |
149 |
|
error("file %s not a directory\n", dname); |
150 |
|
return ERROR_TRIVIAL; |
151 |
|
} |
152 |
|
if ((ds.st_mode & 00777) != mode) { |
153 |
|
error("warning: dir's %s mode should be %o not %o\n", dname, |
154 |
|
mode, ds.st_mode & 00777); |
155 |
|
return ERROR_TRIVIAL; |
156 |
|
} |
157 |
|
return 0; |
158 |
|
} |