Allow the new message to be inserted into a folder within the Maildir
hierarchy instead of the top-level folder.
---
 notmuch-insert.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 45 insertions(+), 2 deletions(-)

diff --git a/notmuch-insert.c b/notmuch-insert.c
index 19b1cf9..778ac04 100644
--- a/notmuch-insert.c
+++ b/notmuch-insert.c
@@ -83,6 +83,23 @@ sync_dir (const char *dir)
     return ret;
 }
 
+/* Check the specified folder name does not contain a directory
+ * component ".." to prevent writes outside of the Maildir hierarchy. */
+static notmuch_bool_t
+check_folder_name (const char *folder)
+{
+    const char *p = folder;
+
+    for (;;) {
+       if ((p[0] == '.') && (p[1] == '.') && (p[2] == '\0' || p[2] == '/'))
+           return FALSE;
+       p = strchr (p, '/');
+       if (!p)
+           return TRUE;
+       p++;
+    }
+}
+
 /* Open a unique file in the Maildir 'tmp' directory.
  * Returns the file descriptor on success, or -1 on failure.
  * On success, file paths for the message in the 'tmp' and 'new'
@@ -287,11 +304,25 @@ notmuch_insert_command (notmuch_config_t *config, int 
argc, char *argv[])
     size_t new_tags_length;
     tag_op_list_t *tag_ops;
     char *query_string = NULL;
+    const char *folder = NULL;
     const char *maildir;
-    int opt_index = 1;
+    int opt_index;
     unsigned int i;
     notmuch_bool_t ret;
 
+    notmuch_opt_desc_t options[] = {
+       { NOTMUCH_OPT_STRING, &folder, "folder", 0, 0 },
+       { NOTMUCH_OPT_END, 0, 0, 0, 0 }
+    };
+
+    opt_index = parse_arguments (argc, argv, options, 1);
+
+    if (opt_index < 0) {
+       fprintf (stderr, "Error: bad argument to notmuch insert: %s\n",
+                argv[-opt_index]);
+       return 1;
+    }
+
     db_path = notmuch_config_get_database_path (config);
     new_tags = notmuch_config_get_new_tags (config, &new_tags_length);
 
@@ -314,7 +345,19 @@ notmuch_insert_command (notmuch_config_t *config, int 
argc, char *argv[])
        return 1;
     }
 
-    maildir = db_path;
+    if (folder == NULL) {
+       maildir = db_path;
+    } else {
+       if (! check_folder_name (folder)) {
+           fprintf (stderr, "Error: bad folder name: %s\n", folder);
+           return 1;
+       }
+       maildir = talloc_asprintf (config, "%s/%s", db_path, folder);
+       if (! maildir) {
+           fprintf (stderr, "Out of memory\n");
+           return 1;
+       }
+    }
 
     /* Setup our handler for SIGINT. We do not set SA_RESTART so that copying
      * from standard input may be interrupted. */
-- 
1.7.12.1

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