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