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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2011-2013 ProFUSION embedded systems
*/
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <shared/util.h>
#include <shared/missing.h>
#include <libkmod/libkmod.h>
#include "kmod.h"
static const char options_s[] = "+hV";
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{},
};
static const struct kmod_cmd kmod_cmd_help;
static const struct kmod_cmd *kmod_cmds[] = {
&kmod_cmd_help,
&kmod_cmd_list,
&kmod_cmd_static_nodes,
};
static const struct kmod_cmd *kmod_compat_cmds[] = {
// clang-format off
&kmod_cmd_compat_lsmod,
&kmod_cmd_compat_rmmod,
&kmod_cmd_compat_insmod,
&kmod_cmd_compat_modinfo,
&kmod_cmd_compat_modprobe,
&kmod_cmd_compat_depmod,
// clang-format on
};
static int kmod_help(int argc, char *argv[])
{
size_t i;
printf("kmod - Manage kernel modules: list, load, unload, etc\n"
"Usage:\n"
"\t%s [options] command [command_options]\n\n"
"Options:\n"
"\t-V, --version show version\n"
"\t-h, --help show this help\n\n"
"Commands:\n",
program_invocation_short_name);
for (i = 0; i < ARRAY_SIZE(kmod_cmds); i++) {
if (kmod_cmds[i]->help != NULL) {
printf(" %-12s %s\n", kmod_cmds[i]->name, kmod_cmds[i]->help);
}
}
puts("\nkmod also handles gracefully if called from following symlinks:");
for (i = 0; i < ARRAY_SIZE(kmod_compat_cmds); i++) {
if (kmod_compat_cmds[i]->help != NULL) {
printf(" %-12s %s\n", kmod_compat_cmds[i]->name,
kmod_compat_cmds[i]->help);
}
}
return EXIT_SUCCESS;
}
static const struct kmod_cmd kmod_cmd_help = {
.name = "help",
.cmd = kmod_help,
.help = "show help message",
};
static int handle_kmod_commands(int argc, char *argv[])
{
const char *cmd;
int err = 0;
size_t i;
for (;;) {
int c;
c = getopt_long(argc, argv, options_s, options, NULL);
if (c == -1)
break;
switch (c) {
case 'h':
kmod_help(argc, argv);
return EXIT_SUCCESS;
case 'V':
kmod_version();
return EXIT_SUCCESS;
case '?':
return EXIT_FAILURE;
default:
fprintf(stderr, "Error: unexpected getopt_long() value '%c'.\n",
c);
return EXIT_FAILURE;
}
}
if (optind >= argc) {
fputs("missing command\n", stderr);
goto fail;
}
cmd = argv[optind];
for (i = 0, err = -EINVAL; i < ARRAY_SIZE(kmod_cmds); i++) {
if (streq(kmod_cmds[i]->name, cmd)) {
err = kmod_cmds[i]->cmd(--argc, ++argv);
break;
}
}
if (err < 0) {
fprintf(stderr, "invalid command '%s'\n", cmd);
goto fail;
}
return err;
fail:
kmod_help(argc, argv);
return EXIT_FAILURE;
}
static int handle_kmod_compat_commands(int argc, char *argv[])
{
size_t i;
for (i = 0; i < ARRAY_SIZE(kmod_compat_cmds); i++) {
if (streq(kmod_compat_cmds[i]->name, program_invocation_short_name))
return kmod_compat_cmds[i]->cmd(argc, argv);
}
return EXIT_FAILURE;
}
int main(int argc, char *argv[])
{
int err;
if (streq(program_invocation_short_name, "kmod"))
err = handle_kmod_commands(argc, argv);
else
err = handle_kmod_compat_commands(argc, argv);
return err;
}
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