diff options
Diffstat (limited to 'add-files.c')
| -rw-r--r-- | add-files.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/add-files.c b/add-files.c new file mode 100644 index 00000000..7b9639b7 --- /dev/null +++ b/add-files.c @@ -0,0 +1,291 @@ +/* notmuch - Not much of an email program, (just index and search) + * + * Copyright © 2009 Carl Worth + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see http://www.gnu.org/licenses/ . + * + * Author: Carl Worth <cworth@cworth.org> + */ + +#include "notmuch-client.h" + +static volatile sig_atomic_t do_add_files_print_progress = 0; + +static void +handle_sigalrm (unused (int signal)) +{ + do_add_files_print_progress = 1; +} + +static void +add_files_print_progress (add_files_state_t *state) +{ + struct timeval tv_now; + double elapsed_overall, rate_overall; + + gettimeofday (&tv_now, NULL); + + elapsed_overall = notmuch_time_elapsed (state->tv_start, tv_now); + rate_overall = (state->processed_files) / elapsed_overall; + + printf ("Processed %d", state->processed_files); + + if (state->total_files) { + double time_remaining; + + time_remaining = ((state->total_files - state->processed_files) / + rate_overall); + printf (" of %d files (", state->total_files); + notmuch_time_print_formatted_seconds (time_remaining); + printf (" remaining). \r"); + } else { + printf (" files (%d files/sec.) \r", (int) rate_overall); + } + + fflush (stdout); +} + +/* Examine 'path' recursively as follows: + * + * o Ask the filesystem for the mtime of 'path' (path_mtime) + * + * o Ask the database for its timestamp of 'path' (path_dbtime) + * + * o If 'path_mtime' > 'path_dbtime' + * + * o For each regular file in 'path' with mtime newer than the + * 'path_dbtime' call add_message to add the file to the + * database. + * + * o For each sub-directory of path, recursively call into this + * same function. + * + * o Tell the database to update its time of 'path' to 'path_mtime' + * + * The 'struct stat *st' must point to a structure that has already + * been initialized for 'path' by calling stat(). + */ +static notmuch_status_t +add_files_recursive (notmuch_database_t *notmuch, + const char *path, + struct stat *st, + add_files_state_t *state) +{ + DIR *dir = NULL; + struct dirent *e, *entry = NULL; + int entry_length; + int err; + char *next = NULL; + time_t path_mtime, path_dbtime; + notmuch_status_t status, ret = NOTMUCH_STATUS_SUCCESS; + notmuch_message_t *message = NULL, **closure; + + /* If we're told to, we bail out on encountering a read-only + * directory, (with this being a clear clue from the user to + * Notmuch that new mail won't be arriving there and we need not + * look. */ + if (state->ignore_read_only_directories && + (st->st_mode & S_IWUSR) == 0) + { + state->saw_read_only_directory = TRUE; + goto DONE; + } + + path_mtime = st->st_mtime; + + path_dbtime = notmuch_database_get_timestamp (notmuch, path); + + dir = opendir (path); + if (dir == NULL) { + fprintf (stderr, "Error opening directory %s: %s\n", + path, strerror (errno)); + ret = NOTMUCH_STATUS_FILE_ERROR; + goto DONE; + } + + entry_length = offsetof (struct dirent, d_name) + + pathconf (path, _PC_NAME_MAX) + 1; + entry = malloc (entry_length); + + while (1) { + err = readdir_r (dir, entry, &e); + if (err) { + fprintf (stderr, "Error reading directory: %s\n", + strerror (errno)); + ret = NOTMUCH_STATUS_FILE_ERROR; + goto DONE; + } + + if (e == NULL) + break; + + /* If this directory hasn't been modified since the last + * add_files, then we only need to look further for + * sub-directories. */ + if (path_mtime <= path_dbtime && entry->d_type != DT_DIR) + continue; + + /* Ignore special directories to avoid infinite recursion. + * Also ignore the .notmuch directory. + */ + /* XXX: Eventually we'll want more sophistication to let the + * user specify files to be ignored. */ + if (strcmp (entry->d_name, ".") == 0 || + strcmp (entry->d_name, "..") == 0 || + strcmp (entry->d_name, ".notmuch") ==0) + { + continue; + } + + next = talloc_asprintf (notmuch, "%s/%s", path, entry->d_name); + + if (stat (next, st)) { + fprintf (stderr, "Error reading %s: %s\n", + next, strerror (errno)); + ret = NOTMUCH_STATUS_FILE_ERROR; + continue; + } + + if (S_ISREG (st->st_mode)) { + /* If the file hasn't been modified since the last + * add_files, then we need not look at it. */ + if (st->st_mtime > path_dbtime) { + state->processed_files++; + + if (state->callback) + closure = &message; + else + closure = NULL; + + status = notmuch_database_add_message (notmuch, next, closure); + switch (status) { + /* success */ + case NOTMUCH_STATUS_SUCCESS: + state->added_messages++; + if (state->callback) + (state->callback) (message); + break; + /* Non-fatal issues (go on to next file) */ + case NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID: + /* Stay silent on this one. */ + break; + case NOTMUCH_STATUS_FILE_NOT_EMAIL: + fprintf (stderr, "Note: Ignoring non-mail file: %s\n", + next); + break; + /* Fatal issues. Don't process anymore. */ + case NOTMUCH_STATUS_XAPIAN_EXCEPTION: + case NOTMUCH_STATUS_OUT_OF_MEMORY: + fprintf (stderr, "Error: %s. Halting processing.\n", + notmuch_status_to_string (status)); + ret = status; + goto DONE; + default: + case NOTMUCH_STATUS_FILE_ERROR: + case NOTMUCH_STATUS_NULL_POINTER: + case NOTMUCH_STATUS_TAG_TOO_LONG: + case NOTMUCH_STATUS_UNBALANCED_FREEZE_THAW: + case NOTMUCH_STATUS_LAST_STATUS: + INTERNAL_ERROR ("add_message returned unexpected value: %d", status); + goto DONE; + } + + if (message) { + notmuch_message_destroy (message); + message = NULL; + } + + if (do_add_files_print_progress) { + do_add_files_print_progress = 0; + add_files_print_progress (state); + } + } + } else if (S_ISDIR (st->st_mode)) { + status = add_files_recursive (notmuch, next, st, state); + if (status && ret == NOTMUCH_STATUS_SUCCESS) + ret = status; + } + + talloc_free (next); + next = NULL; + } + + status = notmuch_database_set_timestamp (notmuch, path, path_mtime); + if (status && ret == NOTMUCH_STATUS_SUCCESS) + ret = status; + + DONE: + if (next) + talloc_free (next); + if (entry) + free (entry); + if (dir) + closedir (dir); + + return ret; +} + +/* This is the top-level entry point for add_files. It does a couple + * of error checks, sets up the progress-printing timer and then calls + * into the recursive function. */ +notmuch_status_t +add_files (notmuch_database_t *notmuch, + const char *path, + add_files_state_t *state) +{ + struct stat st; + notmuch_status_t status; + struct sigaction action; + struct itimerval timerval; + + if (stat (path, &st)) { + fprintf (stderr, "Error reading directory %s: %s\n", + path, strerror (errno)); + return NOTMUCH_STATUS_FILE_ERROR; + } + + if (! S_ISDIR (st.st_mode)) { + fprintf (stderr, "Error: %s is not a directory.\n", path); + return NOTMUCH_STATUS_FILE_ERROR; + } + + /* Setup our handler for SIGALRM */ + memset (&action, 0, sizeof (struct sigaction)); + action.sa_handler = handle_sigalrm; + sigemptyset (&action.sa_mask); + action.sa_flags = SA_RESTART; + sigaction (SIGALRM, &action, NULL); + + /* Then start a timer to send SIGALRM once per second. */ + timerval.it_interval.tv_sec = 1; + timerval.it_interval.tv_usec = 0; + timerval.it_value.tv_sec = 1; + timerval.it_value.tv_usec = 0; + setitimer (ITIMER_REAL, &timerval, NULL); + + status = add_files_recursive (notmuch, path, &st, state); + + /* Now stop the timer. */ + timerval.it_interval.tv_sec = 0; + timerval.it_interval.tv_usec = 0; + timerval.it_value.tv_sec = 0; + timerval.it_value.tv_usec = 0; + setitimer (ITIMER_REAL, &timerval, NULL); + + /* And disable the signal handler. */ + action.sa_handler = SIG_IGN; + sigaction (SIGALRM, &action, NULL); + + return status; +} |