builtin: firmware - add missing file

1 files changed, 168 insertions, 0 deletions

diff --git a/udev/udev-builtin-firmware.c b/udev/udev-builtin-firmware.c
new file mode 100644
index 0000000000..d7921a2693
--- /dev/null
+++ b/udev/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,
+};