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/*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* lsirq - utility to display kernel interrupt information.
*
* Copyright (C) 2019 zhenwei pi <pizhenwei@bytedance.com>
* Copyright (C) 2020 Karel Zak <kzak@redhat.com>
* Copyright (C) 2024 Robin Jarry <robin@jarry.cc>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*/
#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <libsmartcols.h>
#include "closestream.h"
#include "optutils.h"
#include "strutils.h"
#include "xalloc.h"
#include "irq-common.h"
static int print_irq_data(struct irq_output *out,
int softirq, unsigned long threshold,
size_t setsize, cpu_set_t *cpuset)
{
struct libscols_table *table;
table = get_scols_table(out, NULL, NULL, softirq, threshold, setsize, cpuset);
if (!table)
return -1;
scols_print_table(table);
scols_unref_table(table);
return 0;
}
static void __attribute__((__noreturn__)) usage(void)
{
fputs(USAGE_HEADER, stdout);
printf(_(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, stdout);
fputsln(_("Utility to display kernel interrupt information."), stdout);
fputs(USAGE_OPTIONS, stdout);
fputs(_(" -J, --json use JSON output format\n"), stdout);
fputs(_(" -P, --pairs use key=\"value\" output format\n"), stdout);
fputs(_(" -n, --noheadings don't print headings\n"), stdout);
fputs(_(" -o, --output <list> define which output columns to use\n"), stdout);
fputs(_(" -s, --sort <column> specify sort column\n"), stdout);
fputs(_(" -S, --softirq show softirqs instead of interrupts\n"), stdout);
fputs(_(" -t, --threshold <N> only IRQs with counters above <N>\n"), stdout);
fputs(_(" -C, --cpu-list <list> only show counters for these CPUs\n"), stdout);
fputs(USAGE_SEPARATOR, stdout);
fprintf(stdout, USAGE_HELP_OPTIONS(22));
fputs(USAGE_COLUMNS, stdout);
irq_print_columns(stdout, 1);
fprintf(stdout, USAGE_MAN_TAIL("lsirq(1)"));
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
struct irq_output out = {
.ncolumns = 0
};
static const struct option longopts[] = {
{"sort", required_argument, NULL, 's'},
{"noheadings", no_argument, NULL, 'n'},
{"output", required_argument, NULL, 'o'},
{"threshold", required_argument, NULL, 't'},
{"cpu-list", required_argument, NULL, 'C'},
{"softirq", no_argument, NULL, 'S'},
{"json", no_argument, NULL, 'J'},
{"pairs", no_argument, NULL, 'P'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
int c;
const char *outarg = NULL;
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{'J', 'P'},
{0}
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
uintmax_t threshold = 0;
cpu_set_t *cpuset = NULL;
size_t setsize = 0;
int softirq = 0;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
while ((c = getopt_long(argc, argv, "no:s:t:C:ShJPV", longopts, NULL)) != -1) {
err_exclusive_options(c, longopts, excl, excl_st);
switch (c) {
case 'J':
out.json = 1;
break;
case 'P':
out.pairs = 1;
break;
case 'n':
out.no_headings = 1;
break;
case 'o':
outarg = optarg;
break;
case 's':
set_sort_func_by_name(&out, optarg);
break;
case 'S':
softirq = 1;
break;
case 't':
threshold = strtosize_or_err(optarg, _("error: --threshold"));
break;
case 'C': {
int ncpus = get_max_number_of_cpus();
if (ncpus <= 0)
errx(EXIT_FAILURE, _("cannot determine NR_CPUS; aborting"));
if (cpuset != NULL)
cpuset_free(cpuset);
cpuset = cpuset_alloc(ncpus, &setsize, NULL);
if (!cpuset)
err(EXIT_FAILURE, _("cpuset_alloc failed"));
if (cpulist_parse(optarg, cpuset, setsize, 0))
errx(EXIT_FAILURE, _("failed to parse CPU list: %s"),
optarg);
break;
}
case 'V':
print_version(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
}
/* default */
if (!out.ncolumns) {
out.columns[out.ncolumns++] = COL_IRQ;
out.columns[out.ncolumns++] = COL_TOTAL;
out.columns[out.ncolumns++] = COL_NAME;
}
/* add -o [+]<list> to putput */
if (outarg && string_add_to_idarray(outarg, out.columns,
ARRAY_SIZE(out.columns),
&out.ncolumns,
irq_column_name_to_id) < 0)
exit(EXIT_FAILURE);
if (print_irq_data(&out, softirq, threshold, setsize, cpuset) < 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
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