merge udev/, libudev/, systemd/ files in src/; move extras/ to src/

1 files changed, 196 insertions, 0 deletions

diff --git a/src/extras/edd_id/edd_id.c b/src/extras/edd_id/edd_id.c
new file mode 100644
index 0000000000..ac4da07611
--- /dev/null
+++ b/src/extras/edd_id/edd_id.c
@@ -0,0 +1,196 @@
+/*
+ * edd_id - naming of BIOS disk devices via EDD
+ *
+ * Copyright (C) 2005 John Hull <John_Hull@Dell.com>
+ * Copyright (C) 2005 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <dirent.h>
+#include <stdint.h>
+
+#include "libudev.h"
+#include "libudev-private.h"
+
+static void log_fn(struct udev *udev, int priority,
+		   const char *file, int line, const char *fn,
+		   const char *format, va_list args)
+{
+	vsyslog(priority, format, args);
+}
+
+int main(int argc, char *argv[])
+{
+	struct udev *udev;
+	const char *node = NULL;
+	int i;
+	int export = 0;
+	uint32_t disk_id;
+	uint16_t mbr_valid;
+	struct dirent *dent;
+	int disk_fd;
+	int sysfs_fd;
+	DIR *dir = NULL;
+	int rc = 1;
+	char filename[UTIL_PATH_SIZE];
+	char match[UTIL_PATH_SIZE];
+
+	udev = udev_new();
+	if (udev == NULL)
+		goto exit;
+
+	udev_log_init("edd_id");
+	udev_set_log_fn(udev, log_fn);
+
+	for (i = 1 ; i < argc; i++) {
+		char *arg = argv[i];
+
+		if (strcmp(arg, "--export") == 0) {
+			export = 1;
+		} else
+			node = arg;
+	}
+	if (node == NULL) {
+		err(udev, "no node specified\n");
+		fprintf(stderr, "no node specified\n");
+		goto exit;
+	}
+
+	/* check for kernel support */
+	util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev), "/firmware/edd", NULL);
+	dir = opendir(filename);
+	if (dir == NULL) {
+		info(udev, "no kernel EDD support\n");
+		fprintf(stderr, "no kernel EDD support\n");
+		rc = 2;
+		goto exit;
+	}
+
+	disk_fd = open(node, O_RDONLY);
+	if (disk_fd < 0) {
+		info(udev, "unable to open '%s'\n", node);
+		fprintf(stderr, "unable to open '%s'\n", node);
+		rc = 3;
+		goto closedir;
+	}
+
+	/* check for valid MBR signature */
+	if (lseek(disk_fd, 510, SEEK_SET) < 0) {
+		info(udev, "seek to MBR validity failed '%s'\n", node);
+		rc = 4;
+		goto close;
+	}
+	if (read(disk_fd, &mbr_valid, sizeof(mbr_valid)) != sizeof(mbr_valid)) {
+		info(udev, "read MBR validity failed '%s'\n", node);
+		rc = 5;
+		goto close;
+	}
+	if (mbr_valid != 0xAA55) {
+		fprintf(stderr, "no valid MBR signature '%s'\n", node);
+		info(udev, "no valid MBR signature '%s'\n", node);
+		rc=6;
+		goto close;
+	}
+
+	/* read EDD signature */
+	if (lseek(disk_fd, 440, SEEK_SET) < 0) {
+		info(udev, "seek to signature failed '%s'\n", node);
+		rc = 7;
+		goto close;
+	}
+	if (read(disk_fd, &disk_id, sizeof(disk_id)) != sizeof(disk_id)) {
+		info(udev, "read signature failed '%s'\n", node);
+		rc = 8;
+		goto close;
+	}
+	/* all zero is invalid */
+	info(udev, "read id 0x%08x from '%s'\n", disk_id, node);
+	if (disk_id == 0) {
+		fprintf(stderr, "no EDD signature '%s'\n", node);
+		info(udev, "'%s' signature is zero\n", node);
+		rc = 9;
+		goto close;
+	}
+
+	/* lookup signature in sysfs to determine the name */
+	match[0] = '\0';
+	for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+		char sysfs_id_buf[256];
+		uint32_t sysfs_id;
+		ssize_t size;
+
+		if (dent->d_name[0] == '.')
+			continue;
+
+		util_strscpyl(filename, sizeof(filename), dent->d_name, "/mbr_signature", NULL);
+		sysfs_fd = openat(dirfd(dir), filename, O_RDONLY);
+		if (sysfs_fd < 0) {
+			info(udev, "unable to open sysfs '%s'\n", filename);
+			continue;
+		}
+
+		size = read(sysfs_fd, sysfs_id_buf, sizeof(sysfs_id_buf)-1);
+		close(sysfs_fd);
+		if (size <= 0) {
+			info(udev, "read sysfs '%s' failed\n", filename);
+			continue;
+		}
+		sysfs_id_buf[size] = '\0';
+		info(udev, "read '%s' from '%s'\n", sysfs_id_buf, filename);
+		sysfs_id = strtoul(sysfs_id_buf, NULL, 16);
+
+		/* look for matching value, that appears only once */
+		if (disk_id == sysfs_id) {
+			if (match[0] == '\0') {
+				/* store id */
+				util_strscpy(match, sizeof(match), dent->d_name);
+			} else {
+				/* error, same signature for another device */
+				info(udev, "'%s' does not have a unique signature\n", node);
+				fprintf(stderr, "'%s' does not have a unique signature\n", node);
+				rc = 10;
+				goto exit;
+			}
+		}
+	}
+
+	if (match[0] != '\0') {
+		if (export)
+			printf("ID_EDD=%s\n", match);
+		else
+			printf("%s\n", match);
+		rc = 0;
+	}
+
+close:
+	close(disk_fd);
+closedir:
+	closedir(dir);
+exit:
+	udev_unref(udev);
+	udev_log_close();
+	return rc;
+}