seccomp: Improve error message

Print "SECCOMP_FILE not specified" instead of "failed to load (null)".

Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>

diff --git a/jail/preload.c b/jail/preload.c
index 5466f27d0ba5b5b6a9723d0113e12061ec6dd295..24358c6bc30482a97a26c6b4999004ca3d2d822c 100644 (file)
--- a/jail/preload.c
+++ b/jail/preload.c
@@ -27,6 +27,11 @@ static int __preload_main__(int argc, char **argv, char **envp)
 {
        char *env_file = getenv("SECCOMP_FILE");
 
+       if (!env_file || !env_file[0]) {
+               ERROR("SECCOMP_FILE not specified\n");
+               return -1;
+       }
+
        if (install_syscall_filter(*argv, env_file))
                return -1;