prepare builtins for blkid and kmod

1 files changed, 171 insertions, 0 deletions

diff --git a/udev/udev-builtin-blkid.c b/udev/udev-builtin-blkid.c
new file mode 100644
index 0000000000..a787bf2f6c
--- /dev/null
+++ b/udev/udev-builtin-blkid.c
@@ -0,0 +1,171 @@
+/*
+ * probe disks for filesystems and partitions
+ *
+ * Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
+ *
+ * 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/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <blkid/blkid.h>
+
+#include "udev.h"
+
+static void print_property(const char *name, const char *value)
+{
+	char enc[265], safe[256];
+	size_t namelen = strlen(name);
+
+	enc[0] = '\0';
+	safe[0] = '\0';
+
+	if (!strcmp(name, "TYPE") || !strcmp(name, "VERSION")) {
+		blkid_encode_string(value, enc, sizeof(enc));
+		printf("ID_FS_%s=%s\n", name, enc);
+
+	} else if (!strcmp(name, "UUID") ||
+		 !strcmp(name, "LABEL") ||
+		 !strcmp(name, "UUID_SUB")) {
+
+		blkid_safe_string(value, safe, sizeof(safe));
+		printf("ID_FS_%s=%s\n", name, safe);
+
+		blkid_encode_string(value, enc, sizeof(enc));
+		printf("ID_FS_%s_ENC=%s\n", name, enc);
+
+	} else if (!strcmp(name, "PTTYPE")) {
+		printf("ID_PART_TABLE_TYPE=%s\n", value);
+
+	} else if (!strcmp(name, "PART_ENTRY_NAME") ||
+		  !strcmp(name, "PART_ENTRY_TYPE")) {
+
+		blkid_encode_string(value, enc, sizeof(enc));
+		printf("ID_%s=%s\n", name, enc);
+
+	} else if (!strncmp(name, "PART_ENTRY_", 11))
+		printf("ID_%s=%s\n", name, value);
+
+	else if (namelen >= 15 && (
+		   !strcmp(name + (namelen - 12), "_SECTOR_SIZE") ||
+		   !strcmp(name + (namelen - 8), "_IO_SIZE") ||
+		   !strcmp(name, "ALIGNMENT_OFFSET")))
+			printf("ID_IOLIMIT_%s=%s\n", name, value);
+	else
+		printf("ID_FS_%s=%s\n", name, value);
+}
+
+static int probe_superblocks(blkid_probe pr)
+{
+	struct stat st;
+	int rc;
+
+	if (fstat(blkid_probe_get_fd(pr), &st))
+		return -1;
+
+	blkid_probe_enable_partitions(pr, 1);
+
+	if (!S_ISCHR(st.st_mode) && blkid_probe_get_size(pr) <= 1024 * 1440 &&
+	    blkid_probe_is_wholedisk(pr)) {
+		/*
+		 * check if the small disk is partitioned, if yes then
+		 * don't probe for filesystems.
+		 */
+		blkid_probe_enable_superblocks(pr, 0);
+
+		rc = blkid_do_fullprobe(pr);
+		if (rc < 0)
+			return rc;	/* -1 = error, 1 = nothing, 0 = succes */
+
+		if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
+			return 0;	/* partition table detected */
+	}
+
+	blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
+	blkid_probe_enable_superblocks(pr, 1);
+
+	return blkid_do_safeprobe(pr);
+}
+
+static int builtin_blkid(struct udev_device *dev, const char *command, bool test)
+{
+	char *device = "/dev/sda3";
+	int64_t offset = 0;
+	//int noraid = 0;
+	int fd = -1;
+	blkid_probe pr;
+	const char *data;
+	const char *name;
+	int nvals;
+	int i;
+	size_t len;
+	int err = 0;
+
+	//FIXME: read offset, read noraid
+
+	pr = blkid_new_probe();
+	if (!pr) {
+		err = -ENOMEM;
+		return EXIT_FAILURE;
+	}
+
+	blkid_probe_set_superblocks_flags(pr,
+		BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID |
+		BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
+		BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION);
+
+	fd = open(device, O_RDONLY|O_CLOEXEC);
+	if (fd < 0) {
+		fprintf(stderr, "error: %s: %m\n", device);
+		goto out;
+	}
+
+	err = blkid_probe_set_device(pr, fd, offset, 0);
+	if (err < 0)
+		goto out;
+
+	err = probe_superblocks(pr);
+	if (err < 0)
+		goto out;
+
+	nvals = blkid_probe_numof_values(pr);
+	for (i = 0; i < nvals; i++) {
+		if (blkid_probe_get_value(pr, i, &name, &data, &len))
+			continue;
+		len = strnlen((char *) data, len);
+		print_property(name, (char *) data);
+	}
+
+	blkid_free_probe(pr);
+out:
+	if (fd > 0)
+		close(fd);
+	if (err < 0)
+		return EXIT_FAILURE;
+	return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_blkid = {
+	.name = "blkid",
+	.cmd = builtin_blkid,
+	.help = "filesystem and partition probing",
+	.run_once = false,
+};