Print error message and exit. For e.g. nft -c " " nft: no command specified Without this patch, it segfaults. Fixes: https://bugzilla.netfilter.org/show_bug.cgi?id=1215 Signed-off-by: Harsha Sharma <harshasharmaiitr@xxxxxxxxx> --- src/main.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/src/main.c b/src/main.c index 353b87b..58de873 100644 --- a/src/main.c +++ b/src/main.c @@ -170,7 +170,7 @@ int main(int argc, char * const *argv) bool interactive = false; unsigned int debug_mask; unsigned int len; - int i, val, rc; + int i, val, rc, nchar = 0; nft = nft_ctx_new(NFT_CTX_DEFAULT); @@ -271,6 +271,16 @@ int main(int argc, char * const *argv) strcat(buf, " "); } strcat(buf, "\n"); + + for (unsigned int i = 0; i != strlen(buf); i++) { + if (buf[i] != ' ') + nchar++; + } + + if (nchar < 2) { + fprintf(stderr, "%s: no command specified\n", argv[0]); + exit(EXIT_FAILURE); + } rc = !!nft_run_cmd_from_buffer(nft, buf, len + 2); } else if (filename != NULL) { rc = !!nft_run_cmd_from_filename(nft, filename); -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
