fix for setenv bogus var argument handling

[musl] / src / env / setenv.c

diff --git a/src/env/setenv.c b/src/env/setenv.c
index 03e165c..c2c2544 100644 (file)
--- a/src/env/setenv.c
+++ b/src/env/setenv.c
@@ -9,7 +9,7 @@ int setenv(const char *var, const char *value, int overwrite)
        char *s;
        int l1, l2;
 
-       if (strchr(var, '=')) {
+       if (!var || !*var || strchr(var, '=')) {
                errno = EINVAL;
                return -1;
        }