pwrap: Make sure pam_library is null-terminated

We initialize the array with 0. So do not pass the full size of the
array to make sure the last byte is a null byte.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

diff --git a/src/pam_wrapper.c b/src/pam_wrapper.c
index 9b27bc3ba214c42a6210e5c9215d6515deaf5565..0c451d17466799015733e88f36decf4f577eb48b 100644 (file)
--- a/src/pam_wrapper.c
+++ b/src/pam_wrapper.c
@@ -879,7 +879,7 @@ static void pwrap_init(void)
                  "PAM path: %s",
                  libpam_path);
 
-       ret = readlink(libpam_path, pam_library, sizeof(pam_library));
+       ret = readlink(libpam_path, pam_library, sizeof(pam_library) - 1);
        PWRAP_LOG(PWRAP_LOG_TRACE,
                  "PAM library: %s",
                  pam_library);