diff options
Diffstat (limited to 'src/modules-load/modules-load.c')
| -rw-r--r-- | src/modules-load/modules-load.c | 210 |
1 files changed, 210 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..efca237 --- /dev/null +++ b/src/modules-load/modules-load.c @@ -0,0 +1,210 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <errno.h> +#include <getopt.h> +#include <limits.h> +#include <sys/stat.h> + +#include "build.h" +#include "conf-files.h" +#include "constants.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" + +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; + int k; + + k = read_stripped_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; + + if (isempty(line)) + continue; + if (strchr(COMMENTS, *line)) + continue; + + k = module_load_and_warn(ctx, line, true); + if (k == -ENOENT) + continue; + RET_GATHER(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++) + RET_GATHER(r, apply_file(ctx, argv[i], false)); + + } 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; + RET_GATHER(r, k); + } + + k = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs); + if (k < 0) + return log_error_errno(k, "Failed to enumerate modules-load.d files: %m"); + + STRV_FOREACH(fn, files) + RET_GATHER(r, apply_file(ctx, *fn, true)); + } + + return r; +} + +DEFINE_MAIN_FUNCTION(run); |