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authorLennart Poettering <lennart@poettering.net>2010-08-19 02:03:03 +0200
committerLennart Poettering <lennart@poettering.net>2010-08-19 02:03:17 +0200
commitb2423f1f436f847d9fc96a63679be2b5552b6baf (patch)
treeb73ef68fc3335bf43684fa142d8a4e638534d9a3 /src
parent9f24a81068b69e1670d685c4917a5f9f3074d845 (diff)
modules-load: add systemd-modules-load tool that can load a configured list of modules in /etc/modules.d/ on boot, replacing distro-dependent shell hacks for this
Diffstat (limited to 'src')
-rw-r--r--src/modules-load.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/src/modules-load.c b/src/modules-load.c
new file mode 100644
index 0000000000..44ff02e7b8
--- /dev/null
+++ b/src/modules-load.c
@@ -0,0 +1,167 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <dirent.h>
+
+#include "log.h"
+#include "util.h"
+#include "strv.h"
+
+/* This reads all module names listed in /etc/modules.d/?*.modules and
+ * loads them into the kernel. This follows roughly Debian's way to
+ * handle modules, but uses a directory of fragments instead of a
+ * single /etc/modules file. */
+
+static int scandir_filter(const struct dirent *d) {
+ assert(d);
+
+ if (ignore_file(d->d_name))
+ return 0;
+
+ if (d->d_type != DT_REG &&
+ d->d_type != DT_LNK)
+ return 0;
+
+ return endswith(d->d_name, ".modules");
+}
+
+int main(int argc, char *argv[]) {
+ struct dirent **de = NULL;
+ int r = 1, n, i;
+ char **arguments = NULL;
+ unsigned n_arguments = 0, n_allocated = 0;
+
+ if (argc > 1) {
+ log_error("This program takes no argument.");
+ return 1;
+ }
+
+ log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
+ log_parse_environment();
+ log_open();
+
+ if (!(arguments = strv_new("/sbin/modprobe", "-sab", "--", NULL))) {
+ log_error("Failed to allocate string array");
+ goto finish;
+ }
+
+ n_arguments = n_allocated = 3;
+
+ if ((n = scandir("/etc/modules.d/", &de, scandir_filter, alphasort)) < 0) {
+
+ if (errno == ENOENT)
+ r = 0;
+ else
+ log_error("Failed to enumerate /etc/modules.d/ files: %m");
+
+ goto finish;
+ }
+
+ r = 0;
+
+ for (i = 0; i < n; i++) {
+ int k;
+ char *fn;
+ FILE *f;
+
+ k = asprintf(&fn, "/etc/modules.d/%s", de[i]->d_name);
+ free(de[i]);
+
+ if (k < 0) {
+ log_error("Failed to allocate file name.");
+ r = 1;
+ continue;
+ }
+
+ f = fopen(fn, "re");
+ free(fn);
+
+ if (!f) {
+ log_error("Failed to open %s: %m", fn);
+ r = 1;
+ continue;
+ }
+
+ for (;;) {
+ char line[LINE_MAX], *l, *t;
+
+ if (!(fgets(line, sizeof(line), f)))
+ break;
+
+ l = strstrip(line);
+ if (*l == '#' || *l == 0)
+ continue;
+
+ if (!(t = strdup(l))) {
+ log_error("Failed to allocate module name.");
+ continue;
+ }
+
+ if (n_arguments >= n_allocated) {
+ char **a;
+ unsigned m;
+
+ m = MAX(16U, n_arguments*2);
+
+ if (!(a = realloc(arguments, sizeof(char*) * (m+1)))) {
+ log_error("Failed to increase module array size.");
+ free(t);
+ r = 1;
+ continue;
+ }
+
+ arguments = a;
+ n_allocated = m;
+ }
+
+ arguments[n_arguments++] = t;
+ }
+
+ if (ferror(f)) {
+ r = 1;
+ log_error("Failed to read from file: %m");
+ }
+
+ fclose(f);
+ }
+
+ free(de);
+
+finish:
+
+ if (n_arguments > 3) {
+ arguments[n_arguments] = NULL;
+ execv("/sbin/modprobe", arguments);
+
+ log_error("Failed to execute /sbin/modprobe: %m");
+ r = 1;
+ }
+
+ strv_free(arguments);
+
+ return r;
+}