Reintroduce blkid-builtin

The build failure that prompted its removal has been resolved.

Signed-off-by: Richard Yao <ryao@gentoo.org>

1 files changed, 204 insertions, 0 deletions

diff --git a/src/udev/udev-builtin-blkid.c b/src/udev/udev-builtin-blkid.c
new file mode 100644
index 0000000000..4293103046
--- /dev/null
+++ b/src/udev/udev-builtin-blkid.c
@@ -0,0 +1,204 @@
+/*
+ * probe disks for filesystems and partitions
+ *
+ * Copyright (C) 2011 Kay Sievers <kay@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 <getopt.h>
+#include <sys/stat.h>
+#include <blkid/blkid.h>
+
+#include "udev.h"
+
+static void print_property(struct udev_device *dev, bool test, const char *name, const char *value)
+{
+        char s[265];
+
+        s[0] = '\0';
+
+        if (streq(name, "TYPE")) {
+                udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
+
+        } else if (streq(name, "USAGE")) {
+                udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
+
+        } else if (streq(name, "VERSION")) {
+                udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
+
+        } else if (streq(name, "UUID")) {
+                blkid_safe_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
+
+        } else if (streq(name, "UUID_SUB")) {
+                blkid_safe_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
+
+        } else if (streq(name, "LABEL")) {
+                blkid_safe_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
+
+        } else if (streq(name, "PTTYPE")) {
+                udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
+
+        } else if (streq(name, "PART_ENTRY_NAME")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s);
+
+        } else if (streq(name, "PART_ENTRY_TYPE")) {
+                blkid_encode_string(value, s, sizeof(s));
+                udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s);
+
+        } else if (startswith(name, "PART_ENTRY_")) {
+                util_strscpyl(s, sizeof(s), "ID_", name, NULL);
+                udev_builtin_add_property(dev, test, s, 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, int argc, char *argv[], bool test)
+{
+        int64_t offset = 0;
+        bool noraid = false;
+        int fd = -1;
+        blkid_probe pr;
+        const char *data;
+        const char *name;
+        int nvals;
+        int i;
+        size_t len;
+        int err = 0;
+
+        static const struct option options[] = {
+                { "offset", optional_argument, NULL, 'o' },
+                { "noraid", no_argument, NULL, 'R' },
+                {}
+        };
+
+        for (;;) {
+                int option;
+
+                option = getopt_long(argc, argv, "oR", options, NULL);
+                if (option == -1)
+                        break;
+
+                switch (option) {
+                case 'o':
+                        offset = strtoull(optarg, NULL, 0);
+                        break;
+                case 'R':
+                        noraid = true;
+                        break;
+                }
+        }
+
+        pr = blkid_new_probe();
+        if (!pr)
+                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);
+
+        if (noraid)
+                blkid_probe_filter_superblocks_usage(pr, BLKID_FLTR_NOTIN, BLKID_USAGE_RAID);
+
+        fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC);
+        if (fd < 0) {
+                fprintf(stderr, "error: %s: %m\n", udev_device_get_devnode(dev));
+                goto out;
+        }
+
+        err = blkid_probe_set_device(pr, fd, offset, 0);
+        if (err < 0)
+                goto out;
+
+        log_debug("probe %s %sraid offset=%llu\n",
+                  udev_device_get_devnode(dev),
+                  noraid ? "no" : "", (unsigned long long) offset);
+
+        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(dev, test, 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 = true,
+};