summaryrefslogtreecommitdiffstats
path: root/src/modules-load
diff options
context:
space:
mode:
Diffstat (limited to 'src/modules-load')
-rw-r--r--src/modules-load/modules-load.c224
1 files changed, 224 insertions, 0 deletions
diff --git a/src/modules-load/modules-load.c b/src/modules-load/modules-load.c
new file mode 100644
index 0000000..9e20d59
--- /dev/null
+++ b/src/modules-load/modules-load.c
@@ -0,0 +1,224 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <sys/stat.h>
+
+#include "conf-files.h"
+#include "def.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "log.h"
+#include "main-func.h"
+#include "module-util.h"
+#include "pretty-print.h"
+#include "proc-cmdline.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+
+static char **arg_proc_cmdline_modules = NULL;
+static const char conf_file_dirs[] = CONF_PATHS_NULSTR("modules-load.d");
+
+STATIC_DESTRUCTOR_REGISTER(arg_proc_cmdline_modules, strv_freep);
+
+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;
+ _cleanup_free_ char *pp = NULL;
+ int r;
+
+ assert(ctx);
+ assert(path);
+
+ r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f, &pp);
+ 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", pp);
+ 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", pp);
+ 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 == -ENOENT)
+ continue;
+ 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();
+ }
+
+ return 1;
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(kmod_unrefp) struct kmod_ctx *ctx = NULL;
+ int r, k;
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
+
+ log_setup();
+
+ 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.");
+ return -ENOMEM;
+ }
+
+ kmod_load_resources(ctx);
+ kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
+
+ r = 0;
+
+ if (argc > optind) {
+ for (int 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;
+
+ STRV_FOREACH(i, arg_proc_cmdline_modules) {
+ k = module_load_and_warn(ctx, *i, true);
+ if (k == -ENOENT)
+ continue;
+ 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;
+ return r;
+ }
+
+ STRV_FOREACH(fn, files) {
+ k = apply_file(ctx, *fn, true);
+ if (k < 0 && r == 0)
+ r = k;
+ }
+ }
+
+ return r;
+}
+
+DEFINE_MAIN_FUNCTION(run);