diff mbox series

[3/6] config: make a copy of $GIT_CONFIG string

Message ID 20190111221554.GC10188@sigill.intra.peff.net (mailing list archive)
State New, archived
Headers show
Series getenv() timing fixes | expand

Commit Message

Jeff King Jan. 11, 2019, 10:15 p.m. UTC
cmd_config() points our source filename pointer at the return value of
getenv(), but that value may be invalidated by further calls to
environment functions. Let's copy it to make sure it remains valid.

We don't need to bother freeing it, as it remains part of the
whole-process global state until we exit.

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin/config.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/builtin/config.c b/builtin/config.c
index 84385ef165..2db4e763e7 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -598,7 +598,7 @@  int cmd_config(int argc, const char **argv, const char *prefix)
 	int nongit = !startup_info->have_repository;
 	char *value;
 
-	given_config_source.file = getenv(CONFIG_ENVIRONMENT);
+	given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 
 	argc = parse_options(argc, argv, prefix, builtin_config_options,
 			     builtin_config_usage,