From: Junio C Hamano <gitster@xxxxxxxxx>
This code calls git_config from a helper function to parse the config entry
it is interested in. Calling git_config in this way may cause a problem if
the helper function can be called after a previous call to git_config by
another function since the second call to git_config may reset some
variable to the value in the config file which was previously overridden.
The above is not a problem in this case since the function passed to
git_config only parses one config entry and the variable it sets is not
assigned outside of the parsing function. But a programmer who desires
all of the standard config options to be parsed may be tempted to modify
git_attr_config() so that it falls back to git_default_config() and then it
_would_ be vulnerable to the above described behavior.
So, move the call to git_config up into the top-level cmd_* function and
move the responsibility for parsing core.attributesfile into the main
config file parser.
Which is only the logical thing to do ;-)
Signed-off-by: Brandon Casey <drafnel@xxxxxxxxx>
---
attr.c | 15 ++-------------
builtin/check-attr.c | 2 ++
cache.h | 1 +
config.c | 3 +++
environment.c | 1 +
5 files changed, 9 insertions(+), 13 deletions(-)
diff --git a/attr.c b/attr.c
index 0793859..124337d 100644
--- a/attr.c
+++ b/attr.c
@@ -20,8 +20,6 @@ static const char git_attr__unknown[] = "(builtin)unknown";
#define ATTR__UNSET NULL
#define ATTR__UNKNOWN git_attr__unknown
-static const char *attributes_file;
-
/* This is a randomly chosen prime. */
#define HASHSIZE 257
@@ -494,14 +492,6 @@ static int git_attr_system(void)
return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
}
-static int git_attr_config(const char *var, const char *value, void *dummy)
-{
- if (!strcmp(var, "core.attributesfile"))
- return git_config_pathname(&attributes_file, var, value);
-
- return 0;
-}
-
static void bootstrap_attr_stack(void)
{
if (!attr_stack) {
@@ -521,9 +511,8 @@ static void bootstrap_attr_stack(void)
}
}
- git_config(git_attr_config, NULL);
- if (attributes_file) {
- elem = read_attr_from_file(attributes_file, 1);
+ if (git_attributes_file) {
+ elem = read_attr_from_file(git_attributes_file, 1);
if (elem) {
elem->origin = NULL;
elem->prev = attr_stack;
diff --git a/builtin/check-attr.c b/builtin/check-attr.c
index 708988a..abb1165 100644
--- a/builtin/check-attr.c
+++ b/builtin/check-attr.c
@@ -92,6 +92,8 @@ int cmd_check_attr(int argc, const char **argv, const char *prefix)
struct git_attr_check *check;
int cnt, i, doubledash, filei;
+ git_config(git_default_config, NULL);
+
argc = parse_options(argc, argv, prefix, check_attr_options,
check_attr_usage, PARSE_OPT_KEEP_DASHDASH);
diff --git a/cache.h b/cache.h
index 607c2ea..8d95fb2 100644
--- a/cache.h
+++ b/cache.h
@@ -589,6 +589,7 @@ extern int warn_ambiguous_refs;
extern int shared_repository;
extern const char *apply_default_whitespace;
extern const char *apply_default_ignorewhitespace;
+extern const char *git_attributes_file;
extern int zlib_compression_level;
extern int core_compression_level;
extern int core_compression_seen;
diff --git a/config.c b/config.c
index 4183f80..d3bcaa0 100644
--- a/config.c
+++ b/config.c
@@ -491,6 +491,9 @@ static int git_default_core_config(const char *var, const char *value)
return 0;
}
+ if (!strcmp(var, "core.attributesfile"))
+ return git_config_pathname(&git_attributes_file, var, value);
+
if (!strcmp(var, "core.bare")) {
is_bare_repository_cfg = git_config_bool(var, value);
return 0;
diff --git a/environment.c b/environment.c
index e96edcf..d60b73f 100644
--- a/environment.c
+++ b/environment.c
@@ -29,6 +29,7 @@ const char *git_log_output_encoding;
int shared_repository = PERM_UMASK;
const char *apply_default_whitespace;
const char *apply_default_ignorewhitespace;
+const char *git_attributes_file;
int zlib_compression_level = Z_BEST_SPEED;
int core_compression_level;
int core_compression_seen;
--
1.7.7.1.ge3b6f
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