libbpf-tools: Add verbose option to filetop
Support verbose mode and set custom libbpf print callback
in filetop.
@@ -42,6 +42,7 @@ static int output_rows = 20;
static int sort_by = ALL;
static int interval = 1;
static int count = 99999999;
+static bool verbose = false;
const char *argp_program_version = "filetop 0.1";
const char *argp_program_bug_address =
@@ -62,6 +63,7 @@ static const struct argp_option opts[] = {
{ "all", 'a', NULL, 0, "Include special files" },
{ "sort", 's', "SORT", 0, "Sort columns, default all [all, reads, writes, rbytes, wbytes]" },
{ "rows", 'r', "ROWS", 0, "Maximum rows to print, default 20" },
+ { "verbose", 'v', NULL, 0, "Verbose debug output" },
{ NULL, 'h', NULL, OPTION_HIDDEN, "Show the full help" },
{},
};
@@ -114,6 +116,9 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
if (output_rows > OUTPUT_ROWS_LIMIT)
output_rows = OUTPUT_ROWS_LIMIT;
break;
+ case 'v':
+ verbose = true;
+ break;
case 'h':
argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
break;
@@ -143,6 +148,13 @@ 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;
@@ -257,6 +269,7 @@ int main(int argc, char **argv)
return err;
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
+ libbpf_set_print(libbpf_print_fn);
obj = filetop_bpf__open();
if (!obj) {
