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keyfile: retry harder finding a suitable filename in writer()

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Try harder to find a suitable filename by appending a counter
to the name.

https://bugzilla.gnome.org/show_bug.cgi?id=740738
This commit is contained in:
Thomas Haller 2014-11-28 17:36:10 +01:00
parent 74a2c64060
commit 3b1c5ee0fd
1 changed files with 24 additions and 14 deletions
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38
src/settings/plugins/keyfile/writer.c
View file

@ -850,24 +850,34 @@ _internal_write_connection (NMConnection *connection,
* there's a race here, but there's not a lot we can do about it, and
* we shouldn't get more than one connection with the same UUID either.
*/
if (g_file_test (path, G_FILE_TEST_EXISTS) && (g_strcmp0 (path, existing_path) != 0)) {
/* A keyfile with this connection's ID already exists. Pick another name. */
g_free (path);
if (g_strcmp0 (path, existing_path) != 0 && g_file_test (path, G_FILE_TEST_EXISTS)) {
guint i;
gboolean name_found = FALSE;
path = g_strdup_printf ("%s/%s-%s", keyfile_dir, filename, nm_connection_get_uuid (connection));
if (g_file_test (path, G_FILE_TEST_EXISTS)) {
if (existing_path == NULL || g_strcmp0 (path, existing_path) != 0) {
/* This should not happen. But, it actually occurs when
* two connections have the same UUID, and one of the connections
* is edited to contain the same ID as the other one.
* Give up.
*/
/* A keyfile with this connection's ID already exists. Pick another name. */
for (i = 0; i < 100; i++) {
g_free (path);
if (i == 0)
path = g_strdup_printf ("%s/%s-%s", keyfile_dir, filename, nm_connection_get_uuid (connection));
else
path = g_strdup_printf ("%s/%s-%s-%u", keyfile_dir, filename, nm_connection_get_uuid (connection), i);
if (g_strcmp0 (path, existing_path) == 0 || !g_file_test (path, G_FILE_TEST_EXISTS)) {
name_found = TRUE;
break;
}
}
if (!name_found) {
g_free (path);
if (existing_path == NULL) {
/* this really should not happen, we tried hard to find an unused name... bail out. */
g_set_error (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED,
"%s.%d: could not find suitable keyfile file name (%s already used)",
__FILE__, __LINE__, path);
g_free (path);
"%s.%d: could not find suitable keyfile file name (%s/%s already used)",
__FILE__, __LINE__, keyfile_dir, filename);
goto out;
}
/* Both our preferred path based on connection id and id-uuid are taken.
* Fallback to @existing_path */
path = g_strdup (existing_path);
}
}