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cli: config: do not overwrite symlinks when saving config file

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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.
This commit is contained in:
Jani Nikula 2013-04-07 20:15:03 +03:00 committed by David Bremner
parent 7defbcdcec
commit 58ed67992d
2 changed files with 21 additions and 6 deletions
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26
notmuch-config.c
View file

@ -444,7 +444,7 @@ 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);
@ -453,14 +453,30 @@ 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);
g_error_free (error);
/* 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) != 0) {
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
test/config
View file

@ -78,7 +78,6 @@ test_expect_equal "$(notmuch --config=alt-config-link config get user.name)" \
"Link Name"
test_begin_subtest "Writing config file through symlink follows symlink"
test_subtest_known_broken
test_expect_equal "$(readlink alt-config-link)" "alt-config"
test_done