+/* notmuch - Not much of an email program, (just index and search)
+ *
+ * Copyright © 2013 Peter Wang
+ *
+ * Based in part on notmuch-deliver
+ * Copyright © 2010 Ali Polatel
+ *
+ * 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: Peter Wang <novalazy@gmail.com>
+ */
+
+#include "notmuch-client.h"
+#include "tag-util.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+static volatile sig_atomic_t interrupted;
+
+static void
+handle_sigint (unused (int sig))
+{
+ static char msg[] = "Stopping... \n";
+
+ /* This write is "opportunistic", so it's okay to ignore the
+ * result. It is not required for correctness, and if it does
+ * fail or produce a short write, we want to get out of the signal
+ * handler as quickly as possible, not retry it. */
+ IGNORE_RESULT (write (2, msg, sizeof (msg) - 1));
+ interrupted = 1;
+}
+
+/* Like gethostname but guarantees that a null-terminated hostname is
+ * returned, even if it has to make one up. Invalid characters are
+ * substituted such that the hostname can be used within a filename.
+ */
+static void
+safe_gethostname (char *hostname, size_t len)
+{
+ char *p;
+
+ if (gethostname (hostname, len) == -1) {
+ strncpy (hostname, "unknown", len);
+ }
+ hostname[len - 1] = '\0';
+
+ for (p = hostname; *p != '\0'; p++) {
+ if (*p == '/' || *p == ':')
+ *p = '_';
+ }
+}
+
+/* Call fsync() on a directory path. */
+static notmuch_bool_t
+sync_dir (const char *dir)
+{
+ notmuch_bool_t ret;
+ int fd;
+
+ fd = open (dir, O_RDONLY);
+ if (fd == -1) {
+ fprintf (stderr, "Error: open() dir failed: %s\n", strerror (errno));
+ return FALSE;
+ }
+ ret = (fsync (fd) == 0);
+ if (! ret) {
+ fprintf (stderr, "Error: fsync() dir failed: %s\n", strerror (errno));
+ }
+ close (fd);
+ return ret;
+}
+
+/* Open a unique file in the 'tmp' sub-directory of dir.
+ * Returns the file descriptor on success, or -1 on failure.
+ * On success, file paths for the message in the 'tmp' and 'new'
+ * directories are returned via tmppath and newpath,
+ * and the path of the 'new' directory itself in newdir. */
+static int
+maildir_open_tmp_file (void *ctx, const char *dir,
+ char **tmppath, char **newpath, char **newdir)
+{
+ pid_t pid;
+ char hostname[256];
+ struct timeval tv;
+ char *filename;
+ int fd = -1;
+
+ /* We follow the Dovecot file name generation algorithm. */
+ pid = getpid ();
+ safe_gethostname (hostname, sizeof (hostname));
+ do {
+ gettimeofday (&tv, NULL);
+ filename = talloc_asprintf (ctx, "%ld.M%ldP%d.%s",
+ tv.tv_sec, tv.tv_usec, pid, hostname);
+ if (! filename) {
+ fprintf (stderr, "Out of memory\n");
+ return -1;
+ }
+
+ *tmppath = talloc_asprintf (ctx, "%s/tmp/%s", dir, filename);
+ if (! *tmppath) {
+ fprintf (stderr, "Out of memory\n");
+ return -1;
+ }
+
+ fd = open (*tmppath, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600);
+ } while (fd == -1 && errno == EEXIST);
+
+ if (fd == -1) {
+ fprintf (stderr, "Error: opening %s: %s\n", *tmppath, strerror (errno));
+ return -1;
+ }
+
+ *newdir = talloc_asprintf (ctx, "%s/new", dir);
+ *newpath = talloc_asprintf (ctx, "%s/new/%s", dir, filename);
+ if (! *newdir || ! *newpath) {
+ fprintf (stderr, "Out of memory\n");
+ close (fd);
+ unlink (*tmppath);
+ return -1;
+ }
+
+ talloc_free (filename);
+
+ return fd;
+}
+
+/* Copy the contents of standard input (fdin) into fdout.
+ * Returns TRUE if a non-empty file was written successfully.
+ * Otherwise, return FALSE. */
+static notmuch_bool_t
+copy_stdin (int fdin, int fdout)
+{
+ notmuch_bool_t empty = TRUE;
+
+ while (! interrupted) {
+ ssize_t remain;
+ char buf[4096];
+ char *p;
+
+ remain = read (fdin, buf, sizeof (buf));
+ if (remain == 0)
+ break;
+ if (remain < 0) {
+ if (errno == EINTR)
+ continue;
+ fprintf (stderr, "Error: reading from standard input: %s\n",
+ strerror (errno));
+ return FALSE;
+ }
+
+ p = buf;
+ do {
+ ssize_t written = write (fdout, p, remain);
+ if (written < 0 && errno == EINTR)
+ continue;
+ if (written <= 0) {
+ fprintf (stderr, "Error: writing to temporary file: %s",
+ strerror (errno));
+ return FALSE;
+ }
+ p += written;
+ remain -= written;
+ empty = FALSE;
+ } while (remain > 0);
+ }
+
+ return (!interrupted && !empty);
+}
+
+/* Add the specified message file to the notmuch database, applying tags.
+ * The file is renamed to encode notmuch tags as maildir flags. */
+static void
+add_file_to_database (notmuch_database_t *notmuch, const char *path,
+ tag_op_list_t *tag_ops)
+{
+ notmuch_message_t *message;
+ notmuch_status_t status;
+
+ status = notmuch_database_add_message (notmuch, path, &message);
+ switch (status) {
+ case NOTMUCH_STATUS_SUCCESS:
+ case NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID:
+ break;
+ default:
+ case NOTMUCH_STATUS_FILE_NOT_EMAIL:
+ case NOTMUCH_STATUS_READ_ONLY_DATABASE:
+ case NOTMUCH_STATUS_XAPIAN_EXCEPTION:
+ case NOTMUCH_STATUS_OUT_OF_MEMORY:
+ 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_UNBALANCED_ATOMIC:
+ case NOTMUCH_STATUS_LAST_STATUS:
+ fprintf (stderr, "Error: failed to add `%s' to notmuch database: %s\n",
+ path, notmuch_status_to_string (status));
+ return;
+ }
+
+ if (status == NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID) {
+ /* Don't change tags of an existing message. */
+ status = notmuch_message_tags_to_maildir_flags (message);
+ if (status != NOTMUCH_STATUS_SUCCESS)
+ fprintf (stderr, "Error: failed to sync tags to maildir flags\n");
+ } else {
+ tag_op_list_apply (message, tag_ops, TAG_FLAG_MAILDIR_SYNC);
+ }
+
+ notmuch_message_destroy (message);
+}
+
+static notmuch_bool_t
+insert_message (void *ctx, notmuch_database_t *notmuch, int fdin,
+ const char *dir, tag_op_list_t *tag_ops)
+{
+ char *tmppath;
+ char *newpath;
+ char *newdir;
+ int fdout;
+ char *cleanup_path;
+
+ fdout = maildir_open_tmp_file (ctx, dir, &tmppath, &newpath, &newdir);
+ if (fdout < 0)
+ return FALSE;
+
+ cleanup_path = tmppath;
+
+ if (! copy_stdin (fdin, fdout))
+ goto FAIL;
+
+ if (fsync (fdout) != 0) {
+ fprintf (stderr, "Error: fsync failed: %s\n", strerror (errno));
+ goto FAIL;
+ }
+
+ close (fdout);
+ fdout = -1;
+
+ /* Atomically move the new message file from the Maildir 'tmp' directory
+ * to the 'new' directory. We follow the Dovecot recommendation to
+ * simply use rename() instead of link() and unlink().
+ * See also: http://wiki.dovecot.org/MailboxFormat/Maildir#Mail_delivery
+ */
+ if (rename (tmppath, newpath) != 0) {
+ fprintf (stderr, "Error: rename() failed: %s\n", strerror (errno));
+ goto FAIL;
+ }
+
+ cleanup_path = newpath;
+
+ if (! sync_dir (newdir))
+ goto FAIL;
+
+ /* Even if adding the message to the notmuch database fails,
+ * the message is on disk and we consider the delivery completed. */
+ add_file_to_database (notmuch, newpath, tag_ops);
+
+ return TRUE;
+
+ FAIL:
+ if (fdout >= 0)
+ close (fdout);
+ unlink (cleanup_path);
+ return FALSE;
+}
+
+int
+notmuch_insert_command (notmuch_config_t *config, int argc, char *argv[])
+{
+ notmuch_database_t *notmuch;
+ struct sigaction action;
+ const char *db_path;
+ const char **new_tags;
+ size_t new_tags_length;
+ tag_op_list_t *tag_ops;
+ char *query_string = NULL;
+ const char *maildir;
+ int opt_index = 1;
+ unsigned int i;
+ notmuch_bool_t ret;
+
+ db_path = notmuch_config_get_database_path (config);
+ new_tags = notmuch_config_get_new_tags (config, &new_tags_length);
+
+ tag_ops = tag_op_list_create (config);
+ if (tag_ops == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ return 1;
+ }
+ for (i = 0; i < new_tags_length; i++) {
+ if (tag_op_list_append (tag_ops, new_tags[i], FALSE))
+ return 1;
+ }
+
+ if (parse_tag_command_line (config, argc - opt_index, argv + opt_index,
+ &query_string, tag_ops))
+ return 1;
+
+ if (*query_string != '\0') {
+ fprintf (stderr, "Error: unexpected query string: %s\n", query_string);
+ return 1;
+ }
+
+ maildir = db_path;
+
+ /* Setup our handler for SIGINT. We do not set SA_RESTART so that copying
+ * from standard input may be interrupted. */
+ memset (&action, 0, sizeof (struct sigaction));
+ action.sa_handler = handle_sigint;
+ sigemptyset (&action.sa_mask);
+ action.sa_flags = 0;
+ sigaction (SIGINT, &action, NULL);
+
+ if (notmuch_database_open (notmuch_config_get_database_path (config),
+ NOTMUCH_DATABASE_MODE_READ_WRITE, ¬much))
+ return 1;
+
+ ret = insert_message (config, notmuch, STDIN_FILENO, maildir, tag_ops);
+
+ notmuch_database_destroy (notmuch);
+
+ return (ret) ? 0 : 1;
+}
projects / notmuch / commitdiff