libbpf-tools: Add verbose option to bindsnoop
Support verbose mode and set custom libbpf print callback
in bindsnoop.
@@ -30,6 +30,7 @@ static bool emit_timestamp = false;
static pid_t target_pid = 0;
static bool ignore_errors = true;
static char *target_ports = NULL;
+static bool verbose = false;
const char *argp_program_version = "bindsnoop 0.1";
const char *argp_program_bug_address =
@@ -58,6 +59,7 @@ static const struct argp_option opts[] = {
{ "failed", 'x', NULL, 0, "Include errors on output." },
{ "pid", 'p', "PID", 0, "Process ID to trace" },
{ "ports", 'P', "PORTS", 0, "Comma-separated list of ports to trace." },
+ { "verbose", 'v', NULL, 0, "Verbose debug output" },
{ NULL, 'h', NULL, OPTION_HIDDEN, "Show the full help" },
{},
};
@@ -99,6 +101,9 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
case 't':
emit_timestamp = true;
break;
+ case 'v':
+ verbose = true;
+ break;
case 'h':
argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
break;
@@ -108,6 +113,13 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
return 0;
}
+static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
+{
+ if (level == LIBBPF_DEBUG && !verbose)
+ return 0;
+ return vfprintf(stderr, format, args);
+}
+
static void sig_int(int signo)
{
exiting = 1;
@@ -173,6 +185,7 @@ int main(int argc, char **argv)
return err;
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
+ libbpf_set_print(libbpf_print_fn);
obj = bindsnoop_bpf__open();
if (!obj) {
