diff options
| author | Tobias Klauser <tklauser@distanz.ch> | 2013-11-25 09:24:05 +0100 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2013-11-25 09:24:05 +0100 |
| commit | b9c04d953676c63c9e069a9ada1bb589860b470b (patch) | |
| tree | b0f1034a5fa6635e01e836dca137e8418f9d47b7 | |
| parent | 8dcdd694e879451d7b68e45587772757f8d7da87 (diff) | |
bpfc: Check return value of system()
Check the return value of system() when invoking CPP in the BPF parser
and bail out in case of an error.
This fixes the following compiler warning:
bpf_parser.y:754:9: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
| -rw-r--r-- | bpf_parser.y | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/bpf_parser.y b/bpf_parser.y index c8d2a8f..0cf2a75 100644 --- a/bpf_parser.y +++ b/bpf_parser.y @@ -751,7 +751,8 @@ int compile_filter(char *file, int verbose, int bypass, int format, slprintf(tmp_file, sizeof(tmp_file), "%s/.tmp-%u-%s", dir, rand(), base); slprintf(cmd, sizeof(cmd), "cpp -I" PREFIX_STRING "/etc/netsniff-ng/ %s > %s", file, tmp_file); - system(cmd); + if (system(cmd) != 0) + panic("Failed to invoke C preprocessor!\n"); file = tmp_file; xfree(a); |