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authorLibor Pechacek <lpechacek@suse.cz>2011-01-30 19:40:41 (GMT)
committerJunio C Hamano <gitster@pobox.com>2011-02-22 23:19:45 (GMT)
commitb09c53a3e331211fc0154de8ebb271e48f8c7ee5 (patch)
tree341eeb6f6252abd6bf0d5415efe2afcffc3d4c52 /config.c
parent597a63054241c122515c93cbce45bc44eb231f18 (diff)
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Sanity-check config variable names
Sanity-check config variable names when adding and retrieving them. As a side effect code duplication between git_config_set_multivar and get_value (in builtin/config.c) was removed and the common functionality was placed in git_config_parse_key. This breaks a test in t1300 which used invalid section-less keys in the tests for "git -c". However, allowing such names there was useless, since there was no way to set them via config file, and no part of git actually tried to use section-less keys. This patch updates the test to use more realistic examples as well as adding its own test. Signed-off-by: Libor Pechacek <lpechacek@suse.cz> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'config.c')
-rw-r--r--config.c106
1 files changed, 67 insertions, 39 deletions
diff --git a/config.c b/config.c
index 625e051..f758734 100644
--- a/config.c
+++ b/config.c
@@ -1099,6 +1099,70 @@ int git_config_set(const char *key, const char *value)
}
/*
+ * Auxiliary function to sanity-check and split the key into the section
+ * identifier and variable name.
+ *
+ * Returns 0 on success, -1 when there is an invalid character in the key and
+ * -2 if there is no section name in the key.
+ *
+ * store_key - pointer to char* which will hold a copy of the key with
+ * lowercase section and variable name
+ * baselen - pointer to int which will hold the length of the
+ * section + subsection part, can be NULL
+ */
+int git_config_parse_key(const char *key, char **store_key, int *baselen_)
+{
+ int i, dot, baselen;
+ const char *last_dot = strrchr(key, '.');
+
+ /*
+ * Since "key" actually contains the section name and the real
+ * key name separated by a dot, we have to know where the dot is.
+ */
+
+ if (last_dot == NULL) {
+ error("key does not contain a section: %s", key);
+ return -2;
+ }
+
+ baselen = last_dot - key;
+ if (baselen_)
+ *baselen_ = baselen;
+
+ /*
+ * Validate the key and while at it, lower case it for matching.
+ */
+ *store_key = xmalloc(strlen(key) + 1);
+
+ dot = 0;
+ for (i = 0; key[i]; i++) {
+ unsigned char c = key[i];
+ if (c == '.')
+ dot = 1;
+ /* Leave the extended basename untouched.. */
+ if (!dot || i > baselen) {
+ if (!iskeychar(c) ||
+ (i == baselen + 1 && !isalpha(c))) {
+ error("invalid key: %s", key);
+ goto out_free_ret_1;
+ }
+ c = tolower(c);
+ } else if (c == '\n') {
+ error("invalid key (newline): %s", key);
+ goto out_free_ret_1;
+ }
+ (*store_key)[i] = c;
+ }
+ (*store_key)[i] = 0;
+
+ return 0;
+
+out_free_ret_1:
+ free(*store_key);
+ return -1;
+}
+
+/*
* If value==NULL, unset in (remove from) config,
* if value_regex!=NULL, disregard key/value pairs where value does not match.
* if multi_replace==0, nothing, or only one matching key/value is replaced,
@@ -1124,59 +1188,23 @@ int git_config_set(const char *key, const char *value)
int git_config_set_multivar(const char *key, const char *value,
const char *value_regex, int multi_replace)
{
- int i, dot;
int fd = -1, in_fd;
int ret;
char *config_filename;
struct lock_file *lock = NULL;
- const char *last_dot = strrchr(key, '.');
if (config_exclusive_filename)
config_filename = xstrdup(config_exclusive_filename);
else
config_filename = git_pathdup("config");
- /*
- * Since "key" actually contains the section name and the real
- * key name separated by a dot, we have to know where the dot is.
- */
-
- if (last_dot == NULL) {
- error("key does not contain a section: %s", key);
- ret = 2;
+ /* parse-key returns negative; flip the sign to feed exit(3) */
+ ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
+ if (ret)
goto out_free;
- }
- store.baselen = last_dot - key;
store.multi_replace = multi_replace;
- /*
- * Validate the key and while at it, lower case it for matching.
- */
- store.key = xmalloc(strlen(key) + 1);
- dot = 0;
- for (i = 0; key[i]; i++) {
- unsigned char c = key[i];
- if (c == '.')
- dot = 1;
- /* Leave the extended basename untouched.. */
- if (!dot || i > store.baselen) {
- if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
- error("invalid key: %s", key);
- free(store.key);
- ret = 1;
- goto out_free;
- }
- c = tolower(c);
- } else if (c == '\n') {
- error("invalid key (newline): %s", key);
- free(store.key);
- ret = 1;
- goto out_free;
- }
- store.key[i] = c;
- }
- store.key[i] = 0;
/*
* The lock serves a purpose in addition to locking: the new