228 lines
6.1 KiB
C
228 lines
6.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <getopt.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include "conf-files.h"
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#include "def.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "log.h"
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#include "main-func.h"
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#include "module-util.h"
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#include "pretty-print.h"
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#include "proc-cmdline.h"
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#include "string-util.h"
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#include "strv.h"
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#include "util.h"
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static char **arg_proc_cmdline_modules = NULL;
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static const char conf_file_dirs[] = CONF_PATHS_NULSTR("modules-load.d");
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STATIC_DESTRUCTOR_REGISTER(arg_proc_cmdline_modules, strv_freep);
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static void systemd_kmod_log(void *data, int priority, const char *file, int line,
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const char *fn, const char *format, va_list args) {
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DISABLE_WARNING_FORMAT_NONLITERAL;
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log_internalv(priority, 0, file, line, fn, format, args);
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REENABLE_WARNING;
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}
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static int add_modules(const char *p) {
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_cleanup_strv_free_ char **k = NULL;
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k = strv_split(p, ",");
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if (!k)
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return log_oom();
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if (strv_extend_strv(&arg_proc_cmdline_modules, k, true) < 0)
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return log_oom();
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return 0;
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}
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static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
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int r;
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if (proc_cmdline_key_streq(key, "modules_load")) {
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if (proc_cmdline_value_missing(key, value))
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return 0;
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r = add_modules(value);
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if (r < 0)
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return r;
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}
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return 0;
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}
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static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
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_cleanup_fclose_ FILE *f = NULL;
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int r;
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assert(ctx);
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assert(path);
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r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f);
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if (r < 0) {
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if (ignore_enoent && r == -ENOENT)
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return 0;
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return log_error_errno(r, "Failed to open %s: %m", path);
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}
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log_debug("apply: %s", path);
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for (;;) {
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_cleanup_free_ char *line = NULL;
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char *l;
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int k;
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k = read_line(f, LONG_LINE_MAX, &line);
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if (k < 0)
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return log_error_errno(k, "Failed to read file '%s': %m", path);
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if (k == 0)
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break;
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l = strstrip(line);
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if (isempty(l))
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continue;
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if (strchr(COMMENTS, *l))
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continue;
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k = module_load_and_warn(ctx, l, true);
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if (k == -ENOENT)
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continue;
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if (k < 0 && r >= 0)
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r = k;
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}
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return r;
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}
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static int help(void) {
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_cleanup_free_ char *link = NULL;
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int r;
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r = terminal_urlify_man("systemd-modules-load.service", "8", &link);
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if (r < 0)
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return log_oom();
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printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
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"Loads statically configured kernel modules.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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"\nSee the %s for details.\n"
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, program_invocation_short_name
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, link
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);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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return help();
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case ARG_VERSION:
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return version();
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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return 1;
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}
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static int run(int argc, char *argv[]) {
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_cleanup_(kmod_unrefp) struct kmod_ctx *ctx = NULL;
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int r, k;
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r = parse_argv(argc, argv);
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if (r <= 0)
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return r;
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log_setup_service();
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umask(0022);
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r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
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if (r < 0)
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log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
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ctx = kmod_new(NULL, NULL);
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if (!ctx) {
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log_error("Failed to allocate memory for kmod.");
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return -ENOMEM;
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}
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kmod_load_resources(ctx);
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kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
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r = 0;
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if (argc > optind) {
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int i;
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for (i = optind; i < argc; i++) {
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k = apply_file(ctx, argv[i], false);
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if (k < 0 && r == 0)
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r = k;
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}
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} else {
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_cleanup_strv_free_ char **files = NULL;
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char **fn, **i;
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STRV_FOREACH(i, arg_proc_cmdline_modules) {
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k = module_load_and_warn(ctx, *i, true);
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if (k == -ENOENT)
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continue;
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if (k < 0 && r == 0)
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r = k;
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}
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k = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
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if (k < 0) {
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log_error_errno(k, "Failed to enumerate modules-load.d files: %m");
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if (r == 0)
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r = k;
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return r;
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}
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STRV_FOREACH(fn, files) {
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k = apply_file(ctx, *fn, true);
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if (k < 0 && r == 0)
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r = k;
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}
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}
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return r;
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}
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DEFINE_MAIN_FUNCTION(run);
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