diff options
authorLukas Fleischer <>2011-09-14 09:52:43 (GMT)
committerLars Hjemli <>2012-01-03 14:59:36 (GMT)
commitd96d2c98ebc4c2d3765f5b35c4142e0e828a421b (patch)
parent8185169e5e2a8b9438c7a6f3f9c5eb6db5a37fea (diff)
shared.c: Only setenv() if value is non-null
Some setenv() implementations (e.g. the one in OpenBSD's stdlib) segfault if we pass a NULL value. Only set environment variables if the corresponding settings are defined to avoid this. Note that this is a minor behaviour change as environment variables were supposed to be set to an empty string if a setting was undefined. Given that this feature isn't part of any official release yet, there's no need to worry about backwards compatibility, really. Change the documentation accordingly. Signed-off-by: Lukas Fleischer <>
2 files changed, 2 insertions, 2 deletions
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 4721c1e..a22423b 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -500,7 +500,7 @@ Also, all filters are handed the following environment variables:
If a setting is not defined for a repository and the corresponding global
setting is also not defined (if applicable), then the corresponding
-environment variable will be an empty string.
+environment variable will be unset.
diff --git a/shared.c b/shared.c
index 75c4b5c..0c8ce3e 100644
--- a/shared.c
+++ b/shared.c
@@ -392,7 +392,7 @@ void cgit_prepare_repo_env(struct cgit_repo * repo)
p = env_vars;
q = p + env_var_count;
for (; p < q; p++)
- if (setenv(p->name, p->value, 1))
+ if (p->value && setenv(p->name, p->value, 1))
fprintf(stderr, warn, p->name, p->value);