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Diffstat (limited to 'src/udev/src/udev-builtin-firmware.c')
-rw-r--r--src/udev/src/udev-builtin-firmware.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/src/udev/src/udev-builtin-firmware.c b/src/udev/src/udev-builtin-firmware.c
new file mode 100644
index 0000000000..d212c64b4d
--- /dev/null
+++ b/src/udev/src/udev-builtin-firmware.c
@@ -0,0 +1,168 @@
+/*
+ * firmware - Kernel firmware loader
+ *
+ * Copyright (C) 2009 Piter Punk <piterpunk@slackware.com>
+ * Copyright (C) 2009-2011 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This program 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.
+ *
+ * This program 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:*
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <sys/utsname.h>
+#include <sys/stat.h>
+
+#include "udev.h"
+
+static bool set_loading(struct udev *udev, char *loadpath, const char *state)
+{
+ FILE *ldfile;
+
+ ldfile = fopen(loadpath, "we");
+ if (ldfile == NULL) {
+ err(udev, "error: can not open '%s'\n", loadpath);
+ return false;
+ };
+ fprintf(ldfile, "%s\n", state);
+ fclose(ldfile);
+ return true;
+}
+
+static bool copy_firmware(struct udev *udev, const char *source, const char *target, size_t size)
+{
+ char *buf;
+ FILE *fsource = NULL, *ftarget = NULL;
+ bool ret = false;
+
+ buf = malloc(size);
+ if (buf == NULL) {
+ err(udev,"No memory available to load firmware file");
+ return false;
+ }
+
+ info(udev, "writing '%s' (%zi) to '%s'\n", source, size, target);
+
+ fsource = fopen(source, "re");
+ if (fsource == NULL)
+ goto exit;
+ ftarget = fopen(target, "we");
+ if (ftarget == NULL)
+ goto exit;
+ if (fread(buf, size, 1, fsource) != 1)
+ goto exit;
+ if (fwrite(buf, size, 1, ftarget) == 1)
+ ret = true;
+exit:
+ if (ftarget != NULL)
+ fclose(ftarget);
+ if (fsource != NULL)
+ fclose(fsource);
+ free(buf);
+ return ret;
+}
+
+static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], bool test)
+{
+ struct udev *udev = udev_device_get_udev(dev);
+ static const char *searchpath[] = { FIRMWARE_PATH };
+ char fwencpath[UTIL_PATH_SIZE];
+ char misspath[UTIL_PATH_SIZE];
+ char loadpath[UTIL_PATH_SIZE];
+ char datapath[UTIL_PATH_SIZE];
+ char fwpath[UTIL_PATH_SIZE];
+ const char *firmware;
+ FILE *fwfile;
+ struct utsname kernel;
+ struct stat statbuf;
+ unsigned int i;
+ int rc = EXIT_SUCCESS;
+
+ firmware = udev_device_get_property_value(dev, "FIRMWARE");
+ if (firmware == NULL) {
+ err(udev, "firmware parameter missing\n\n");
+ rc = EXIT_FAILURE;
+ goto exit;
+ }
+
+ /* lookup firmware file */
+ uname(&kernel);
+ for (i = 0; i < ARRAY_SIZE(searchpath); i++) {
+ util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL);
+ dbg(udev, "trying %s\n", fwpath);
+ fwfile = fopen(fwpath, "re");
+ if (fwfile != NULL)
+ break;
+
+ util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL);
+ dbg(udev, "trying %s\n", fwpath);
+ fwfile = fopen(fwpath, "re");
+ if (fwfile != NULL)
+ break;
+ }
+
+ util_path_encode(firmware, fwencpath, sizeof(fwencpath));
+ util_strscpyl(misspath, sizeof(misspath), udev_get_run_path(udev), "/firmware-missing/", fwencpath, NULL);
+ util_strscpyl(loadpath, sizeof(loadpath), udev_device_get_syspath(dev), "/loading", NULL);
+
+ if (fwfile == NULL) {
+ int err;
+
+ /* This link indicates the missing firmware file and the associated device */
+ info(udev, "did not find firmware file '%s'\n", firmware);
+ do {
+ err = util_create_path(udev, misspath);
+ if (err != 0 && err != -ENOENT)
+ break;
+ err = symlink(udev_device_get_devpath(dev), misspath);
+ if (err != 0)
+ err = -errno;
+ } while (err == -ENOENT);
+ rc = EXIT_FAILURE;
+ set_loading(udev, loadpath, "-1");
+ goto exit;
+ }
+
+ if (stat(fwpath, &statbuf) < 0 || statbuf.st_size == 0) {
+ rc = EXIT_FAILURE;
+ goto exit;
+ }
+ if (unlink(misspath) == 0)
+ util_delete_path(udev, misspath);
+
+ if (!set_loading(udev, loadpath, "1"))
+ goto exit;
+
+ util_strscpyl(datapath, sizeof(datapath), udev_device_get_syspath(dev), "/data", NULL);
+ if (!copy_firmware(udev, fwpath, datapath, statbuf.st_size)) {
+ err(udev, "error sending firmware '%s' to device\n", firmware);
+ set_loading(udev, loadpath, "-1");
+ rc = EXIT_FAILURE;
+ goto exit;
+ };
+
+ set_loading(udev, loadpath, "0");
+exit:
+ if (fwfile)
+ fclose(fwfile);
+ return rc;
+}
+
+const struct udev_builtin udev_builtin_firmware = {
+ .name = "firmware",
+ .cmd = builtin_firmware,
+ .help = "kernel firmware loader",
+ .run_once = true,
+};