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-rw-r--r--config.c24
-rwxr-xr-xt/t1300-repo-config.sh8
2 files changed, 31 insertions, 1 deletions
diff --git a/config.c b/config.c
index 2bbf02d..ac69cb6 100644
--- a/config.c
+++ b/config.c
@@ -1558,20 +1558,42 @@ static int section_name_match (const char *buf, const char *name)
return 0;
}
+static int section_name_is_ok(const char *name)
+{
+ /* Empty section names are bogus. */
+ if (!*name)
+ return 0;
+
+ /*
+ * Before a dot, we must be alphanumeric or dash. After the first dot,
+ * anything goes, so we can stop checking.
+ */
+ for (; *name && *name != '.'; name++)
+ if (*name != '-' && !isalnum(*name))
+ return 0;
+ return 1;
+}
+
/* if new_name == NULL, the section is removed instead */
int git_config_rename_section_in_file(const char *config_filename,
const char *old_name, const char *new_name)
{
int ret = 0, remove = 0;
char *filename_buf = NULL;
- struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
+ struct lock_file *lock;
int out_fd;
char buf[1024];
FILE *config_file;
+ if (new_name && !section_name_is_ok(new_name)) {
+ ret = error("invalid section name: %s", new_name);
+ goto out;
+ }
+
if (!config_filename)
config_filename = filename_buf = git_pathdup("config");
+ lock = xcalloc(sizeof(struct lock_file), 1);
out_fd = hold_lock_file_for_update(lock, config_filename, 0);
if (out_fd < 0) {
ret = error("could not lock config file %s", config_filename);
diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 36e227b..a477453 100755
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -550,6 +550,14 @@ EOF
test_expect_success "rename succeeded" "test_cmp expect .git/config"
+test_expect_success 'renaming empty section name is rejected' '
+ test_must_fail git config --rename-section branch.zwei ""
+'
+
+test_expect_success 'renaming to bogus section is rejected' '
+ test_must_fail git config --rename-section branch.zwei "bogus name"
+'
+
cat >> .git/config << EOF
[branch "zwei"] a = 1 [branch "vier"]
EOF