mirror of
https://git.notmuchmail.org/git/notmuch
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4c62d9366a
We rely completely on zlib to do the right thing in detecting gzipped input. Since our dump format is chosen to be 7 bit ascii, this should be fine.
322 lines
8.2 KiB
C
322 lines
8.2 KiB
C
/* notmuch - Not much of an email program, (just index and search)
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*
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* Copyright © 2009 Carl Worth
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://www.gnu.org/licenses/ .
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*
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* Author: Carl Worth <cworth@cworth.org>
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*/
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#include "notmuch-client.h"
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#include "hex-escape.h"
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#include "tag-util.h"
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#include "string-util.h"
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#include "zlib-extra.h"
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static regex_t regex;
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/* Non-zero return indicates an error in retrieving the message,
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* or in applying the tags. Missing messages are reported, but not
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* considered errors.
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*/
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static int
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tag_message (unused (void *ctx),
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notmuch_database_t *notmuch,
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const char *message_id,
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tag_op_list_t *tag_ops,
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tag_op_flag_t flags)
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{
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notmuch_status_t status;
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notmuch_message_t *message = NULL;
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int ret = 0;
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status = notmuch_database_find_message (notmuch, message_id, &message);
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if (status) {
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fprintf (stderr, "Error applying tags to message %s: %s\n",
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message_id, notmuch_status_to_string (status));
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return 1;
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}
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if (message == NULL) {
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fprintf (stderr, "Warning: cannot apply tags to missing message: %s\n",
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message_id);
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/* We consider this a non-fatal error. */
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return 0;
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}
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/* In order to detect missing messages, this check/optimization is
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* intentionally done *after* first finding the message. */
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if ((flags & TAG_FLAG_REMOVE_ALL) || tag_op_list_size (tag_ops))
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ret = tag_op_list_apply (message, tag_ops, flags);
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notmuch_message_destroy (message);
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return ret;
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}
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/* Sup dump output is one line per message. We match a sequence of
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* non-space characters for the message-id, then one or more
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* spaces, then a list of space-separated tags as a sequence of
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* characters within literal '(' and ')'. */
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static int
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parse_sup_line (void *ctx, char *line,
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char **query_str, tag_op_list_t *tag_ops)
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{
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regmatch_t match[3];
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char *file_tags;
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int rerr;
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tag_op_list_reset (tag_ops);
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chomp_newline (line);
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/* Silently ignore blank lines */
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if (line[0] == '\0') {
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return 1;
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}
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rerr = xregexec (®ex, line, 3, match, 0);
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if (rerr == REG_NOMATCH) {
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fprintf (stderr, "Warning: Ignoring invalid sup format line: %s\n",
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line);
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return 1;
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}
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*query_str = talloc_strndup_debug (ctx, line + match[1].rm_so,
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match[1].rm_eo - match[1].rm_so);
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file_tags = talloc_strndup_debug (ctx, line + match[2].rm_so,
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match[2].rm_eo - match[2].rm_so);
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char *tok = file_tags;
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size_t tok_len = 0;
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tag_op_list_reset (tag_ops);
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while ((tok = strtok_len (tok + tok_len, " ", &tok_len)) != NULL) {
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if (*(tok + tok_len) != '\0') {
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*(tok + tok_len) = '\0';
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tok_len++;
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}
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if (tag_op_list_append (tag_ops, tok, FALSE))
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return -1;
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}
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return 0;
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}
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int
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notmuch_restore_command (notmuch_config_t *config, int argc, char *argv[])
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{
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notmuch_database_t *notmuch;
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notmuch_bool_t accumulate = FALSE;
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tag_op_flag_t flags = 0;
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tag_op_list_t *tag_ops;
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char *input_file_name = NULL;
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const char *name_for_error = NULL;
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gzFile input = NULL;
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char *line = NULL;
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void *line_ctx = NULL;
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ssize_t line_len;
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int ret = 0;
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int opt_index;
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int input_format = DUMP_FORMAT_AUTO;
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if (notmuch_database_open (notmuch_config_get_database_path (config),
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NOTMUCH_DATABASE_MODE_READ_WRITE, ¬much))
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return EXIT_FAILURE;
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if (notmuch_config_get_maildir_synchronize_flags (config))
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flags |= TAG_FLAG_MAILDIR_SYNC;
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notmuch_opt_desc_t options[] = {
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{ NOTMUCH_OPT_KEYWORD, &input_format, "format", 'f',
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(notmuch_keyword_t []){ { "auto", DUMP_FORMAT_AUTO },
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{ "batch-tag", DUMP_FORMAT_BATCH_TAG },
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{ "sup", DUMP_FORMAT_SUP },
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{ 0, 0 } } },
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{ NOTMUCH_OPT_STRING, &input_file_name, "input", 'i', 0 },
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{ NOTMUCH_OPT_BOOLEAN, &accumulate, "accumulate", 'a', 0 },
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{ 0, 0, 0, 0, 0 }
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};
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opt_index = parse_arguments (argc, argv, options, 1);
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if (opt_index < 0) {
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ret = EXIT_FAILURE;
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goto DONE;
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}
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name_for_error = input_file_name ? input_file_name : "stdin";
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if (! accumulate)
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flags |= TAG_FLAG_REMOVE_ALL;
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errno = 0;
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if (input_file_name)
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input = gzopen (input_file_name, "r");
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else {
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int infd = dup (STDIN_FILENO);
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if (infd < 0) {
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fprintf (stderr, "Error duping stdin: %s\n",
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strerror (errno));
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ret = EXIT_FAILURE;
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goto DONE;
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}
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input = gzdopen (infd, "r");
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if (! input)
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close (infd);
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}
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if (input == NULL) {
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fprintf (stderr, "Error opening %s for (gzip) reading: %s\n",
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name_for_error, strerror (errno));
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ret = EXIT_FAILURE;
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goto DONE;
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}
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if (opt_index < argc) {
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fprintf (stderr, "Unused positional parameter: %s\n", argv[opt_index]);
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ret = EXIT_FAILURE;
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goto DONE;
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}
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tag_ops = tag_op_list_create (config);
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if (tag_ops == NULL) {
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fprintf (stderr, "Out of memory.\n");
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ret = EXIT_FAILURE;
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goto DONE;
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}
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do {
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util_status_t status;
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status = gz_getline (line_ctx, &line, &line_len, input);
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/* empty input file not considered an error */
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if (status == UTIL_EOF) {
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ret = EXIT_SUCCESS;
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goto DONE;
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}
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if (status) {
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fprintf (stderr, "Error reading (gzipped) input: %s\n",
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gz_error_string(status, input));
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ret = EXIT_FAILURE;
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goto DONE;
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}
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} while ((line_len == 0) ||
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(line[0] == '#') ||
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/* the cast is safe because we checked about for line_len < 0 */
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(strspn (line, " \t\n") == (unsigned)line_len));
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char *p;
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for (p = line; (input_format == DUMP_FORMAT_AUTO) && *p; p++) {
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if (*p == '(')
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input_format = DUMP_FORMAT_SUP;
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}
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if (input_format == DUMP_FORMAT_AUTO)
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input_format = DUMP_FORMAT_BATCH_TAG;
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if (input_format == DUMP_FORMAT_SUP)
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if ( xregcomp (®ex,
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"^([^ ]+) \\(([^)]*)\\)$",
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REG_EXTENDED) )
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INTERNAL_ERROR ("compile time constant regex failed.");
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do {
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char *query_string, *prefix, *term;
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if (line_ctx != NULL)
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talloc_free (line_ctx);
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line_ctx = talloc_new (config);
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if (input_format == DUMP_FORMAT_SUP) {
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ret = parse_sup_line (line_ctx, line, &query_string, tag_ops);
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} else {
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ret = parse_tag_line (line_ctx, line, TAG_FLAG_BE_GENEROUS,
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&query_string, tag_ops);
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if (ret == 0) {
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ret = parse_boolean_term (line_ctx, query_string,
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&prefix, &term);
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if (ret && errno == EINVAL) {
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fprintf (stderr, "Warning: cannot parse query: %s (skipping)\n", query_string);
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continue;
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} else if (ret) {
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/* This is more fatal (e.g., out of memory) */
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fprintf (stderr, "Error parsing query: %s\n",
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strerror (errno));
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ret = 1;
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break;
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} else if (strcmp ("id", prefix) != 0) {
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fprintf (stderr, "Warning: not an id query: %s (skipping)\n", query_string);
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continue;
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}
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query_string = term;
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}
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}
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if (ret > 0)
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continue;
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if (ret < 0)
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break;
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ret = tag_message (line_ctx, notmuch, query_string,
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tag_ops, flags);
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if (ret)
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break;
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} while (! (ret = gz_getline (line_ctx, &line, &line_len, input)));
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/* EOF is normal loop termination condition, UTIL_SUCCESS is
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* impossible here */
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if (ret == UTIL_EOF) {
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ret = EXIT_SUCCESS;
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} else {
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fprintf (stderr, "Error reading (gzipped) input: %s\n",
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gz_error_string (ret, input));
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ret = EXIT_FAILURE;
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}
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/* currently this should not be after DONE: since we don't
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* know if the xregcomp was reached
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*/
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if (input_format == DUMP_FORMAT_SUP)
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regfree (®ex);
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DONE:
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if (line_ctx != NULL)
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talloc_free (line_ctx);
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if (notmuch)
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notmuch_database_destroy (notmuch);
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if (input && gzclose_r (input)) {
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fprintf (stderr, "Error closing %s: %s\n",
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name_for_error, gzerror (input, NULL));
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ret = EXIT_FAILURE;
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}
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return ret ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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