When $HOME is unset, home_config_paths fails and returns NULL pointers
for user_config and xdg_config. Valgrind complains with Syscall param
access(pathname) points to unaddressable byte(s).
Don't call blindly access() on these variables, but test them for
NULL-ness before.
The when the XDG configuration file can be found but not $HOME/.gitconfig
requires a bit of attention. We chose to error out in "git config --set"
if $HOME is unset anyway.
Signed-off-by: Matthieu Moy <Matthieu.Moy@xxxxxxx>
---
Before I forget about it, here's the patch assuming people do want to
error out when $HOME is unset. It should be functionally equivalent to
the previous one, but the code should be clearer.
builtin/config.c | 15 +++++++++++----
config.c | 4 ++--
2 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/builtin/config.c b/builtin/config.c
index e8e1c0a..f064d6e 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -387,12 +387,19 @@ int cmd_config(int argc, const char **argv, const char *prefix)
home_config_paths(&user_config, &xdg_config, "config");
- if (access(user_config, R_OK) && !access(xdg_config, R_OK))
+ if (!user_config)
+ /*
+ * Don't even try to access the xdg_config, as
+ * unset $HOME means something is really
+ * broken and should be fixed. Silently
+ * writing to xdg_config may be confusing.
+ */
+ die("$HOME not set");
+ else if (access(user_config, R_OK) &&
+ xdg_config && !access(xdg_config, R_OK))
given_config_file = xdg_config;
- else if (user_config)
- given_config_file = user_config;
else
- die("$HOME not set");
+ given_config_file = user_config;
}
else if (use_system_config)
given_config_file = git_etc_gitconfig();
diff --git a/config.c b/config.c
index d28a499..6b97503 100644
--- a/config.c
+++ b/config.c
@@ -940,12 +940,12 @@ int git_config_early(config_fn_t fn, void *data, const char *repo_config)
found += 1;
}
- if (!access(xdg_config, R_OK)) {
+ if (xdg_config && !access(xdg_config, R_OK)) {
ret += git_config_from_file(fn, xdg_config, data);
found += 1;
}
- if (!access(user_config, R_OK)) {
+ if (user_config && !access(user_config, R_OK)) {
ret += git_config_from_file(fn, user_config, data);
found += 1;
}
--
1.7.11.1.30.g7e1baf9.dirty
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