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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ctype.h>
#include <getopt.h>
#include <stdlib.h>
#include <iostream>
#include <android-base/strings.h>
#include <modprobe/modprobe.h>
enum modprobe_mode {
AddModulesMode,
RemoveModulesMode,
ListModulesMode,
ShowDependenciesMode,
};
static void print_usage(void) {
std::cerr << "Usage:" << std::endl;
std::cerr << std::endl;
std::cerr << " modprobe [-alrqvsDb] [-d DIR] [MODULE]+" << std::endl;
std::cerr << " modprobe [-alrqvsDb] [-d DIR] MODULE [symbol=value][...]" << std::endl;
std::cerr << std::endl;
std::cerr << "Options:" << std::endl;
std::cerr << " -b: Apply blacklist to module names too" << std::endl;
std::cerr << " -d: Load modules from DIR, option may be used multiple times" << std::endl;
std::cerr << " -D: Print dependencies for modules only, do not load";
std::cerr << " -h: Print this help" << std::endl;
std::cerr << " -l: List modules matching pattern" << std::endl;
std::cerr << " -r: Remove MODULE (multiple modules may be specified)" << std::endl;
std::cerr << " -q: Quiet" << std::endl;
std::cerr << " -v: Verbose" << std::endl;
std::cerr << std::endl;
}
#define check_mode() \
if (mode != AddModulesMode) { \
std::cerr << "Error, multiple mode flags specified" << std::endl; \
print_usage(); \
return EXIT_FAILURE; \
}
extern "C" int modprobe_main(int argc, char** argv) {
std::vector<std::string> modules;
std::string module_parameters;
std::vector<std::string> mod_dirs;
modprobe_mode mode = AddModulesMode;
bool blacklist = false;
bool verbose = false;
int rv = EXIT_SUCCESS;
int opt;
while ((opt = getopt(argc, argv, "abd:Dhlqrv")) != -1) {
switch (opt) {
case 'a':
// toybox modprobe supported -a to load multiple modules, this
// is supported here by default, ignore flag
check_mode();
break;
case 'b':
blacklist = true;
break;
case 'd':
mod_dirs.emplace_back(optarg);
break;
case 'D':
check_mode();
mode = ShowDependenciesMode;
break;
case 'h':
print_usage();
return EXIT_SUCCESS;
case 'l':
check_mode();
mode = ListModulesMode;
break;
case 'q':
verbose = false;
break;
case 'r':
check_mode();
mode = RemoveModulesMode;
break;
case 'v':
verbose = true;
break;
default:
std::cerr << "Unrecognized option: " << opt << std::endl;
return EXIT_FAILURE;
}
}
int parameter_count = 0;
for (opt = optind; opt < argc; opt++) {
if (!strchr(argv[opt], '=')) {
modules.emplace_back(argv[opt]);
} else {
parameter_count++;
if (module_parameters.empty()) {
module_parameters = argv[opt];
} else {
module_parameters = module_parameters + " " + argv[opt];
}
}
}
if (verbose) {
std::cout << "mode is " << mode << std::endl;
std::cout << "verbose is " << verbose << std::endl;
std::cout << "mod_dirs is: " << android::base::Join(mod_dirs, "") << std::endl;
std::cout << "modules is: " << android::base::Join(modules, "") << std::endl;
std::cout << "module parameters is: " << android::base::Join(module_parameters, "")
<< std::endl;
}
if (modules.empty()) {
if (mode == ListModulesMode) {
// emulate toybox modprobe list with no pattern (list all)
modules.emplace_back("*");
} else {
std::cerr << "No modules given." << std::endl;
print_usage();
return EXIT_FAILURE;
}
}
if (mod_dirs.empty()) {
std::cerr << "No module configuration directories given." << std::endl;
print_usage();
return EXIT_FAILURE;
}
if (parameter_count && modules.size() > 1) {
std::cerr << "Only one module may be loaded when specifying module parameters."
<< std::endl;
print_usage();
return EXIT_FAILURE;
}
Modprobe m(mod_dirs);
m.EnableVerbose(verbose);
if (blacklist) {
m.EnableBlacklist(true);
}
for (const auto& module : modules) {
switch (mode) {
case AddModulesMode:
if (!m.LoadWithAliases(module, true, module_parameters)) {
std::cerr << "Failed to load module " << module;
rv = EXIT_FAILURE;
}
break;
case RemoveModulesMode:
if (!m.Remove(module)) {
std::cerr << "Failed to remove module " << module;
rv = EXIT_FAILURE;
}
break;
case ListModulesMode: {
std::vector<std::string> list = m.ListModules(module);
std::cout << android::base::Join(list, "\n") << std::endl;
break;
}
case ShowDependenciesMode: {
std::vector<std::string> pre_deps;
std::vector<std::string> deps;
std::vector<std::string> post_deps;
if (!m.GetAllDependencies(module, &pre_deps, &deps, &post_deps)) {
rv = EXIT_FAILURE;
break;
}
std::cout << "Dependencies for " << module << ":" << std::endl;
std::cout << "Soft pre-dependencies:" << std::endl;
std::cout << android::base::Join(pre_deps, "\n") << std::endl;
std::cout << "Hard dependencies:" << std::endl;
std::cout << android::base::Join(deps, "\n") << std::endl;
std::cout << "Soft post-dependencies:" << std::endl;
std::cout << android::base::Join(post_deps, "\n") << std::endl;
break;
}
default:
std::cerr << "Bad mode";
rv = EXIT_FAILURE;
}
}
return rv;
}
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