Use realpath to canonicalize the config path before writing. Previously 'notmuch setup' and 'notmuch config set' overwrote the config file even if it was a symbolic link. --- notmuch-config.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/notmuch-config.c b/notmuch-config.c index b5c2066..89bc143 100644 --- a/notmuch-config.c +++ b/notmuch-config.c @@ -461,7 +461,7 @@ int notmuch_config_save (notmuch_config_t *config) { size_t length; - char *data; + char *data, *filename; GError *error = NULL; data = g_key_file_to_data (config->key_file, &length, NULL); @@ -470,14 +470,30 @@ notmuch_config_save (notmuch_config_t *config) return 1; } - if (! g_file_set_contents (config->filename, data, length, &error)) { - fprintf (stderr, "Error saving configuration to %s: %s\n", - config->filename, error->message); + /* Try not to overwrite symlinks. */ + filename = realpath (config->filename, NULL); + if (! filename) { + fprintf (stderr, "Error canonicalizing %s: %s\n", config->filename, + strerror (errno)); + g_free (data); + return 1; + } + + if (! g_file_set_contents (filename, data, length, &error)) { + if (strcmp (filename, config->filename)) { + fprintf (stderr, "Error saving configuration to %s (-> %s): %s\n", + config->filename, filename, error->message); + } else { + fprintf (stderr, "Error saving configuration to %s: %s\n", + filename, error->message); + } g_error_free (error); + free (filename); g_free (data); return 1; } + free (filename); g_free (data); return 0; } -- 1.7.10.4