fix for setenv bogus var argument handling

thanks to mikachu

per POSIX:

The setenv() function shall fail if:

[EINVAL] The name argument is a null pointer, points to an empty
string, or points to a string containing an '=' character.

diff --git a/src/env/setenv.c b/src/env/setenv.c
index 03e165c8b332223f92d81d65088b1b288c5e4a42..c2c25444cbbd069c1eb99cd9f9ec8a57be0d18ce 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;
        }