Util-Linux Archive on lore.kernel.org
 help / color / Atom feed
* [PATCH] blockdev: Don't fail on missing start sector
@ 2020-05-31 23:35 Stanislav Brabec
  2020-06-01  8:13 ` Karel Zak
  2020-06-03 15:16 ` Karel Zak
  0 siblings, 2 replies; 6+ messages in thread
From: Stanislav Brabec @ 2020-05-31 23:35 UTC (permalink / raw)
  To: util-linux; +Cc: Martin Wilck

Device mapper devices don't provide start sector.

It causes "blockdev --report" error:
blockdev: /dev/dm-9: failed to read partition start from sysfs: No such
file or directory

There is no reliable way to detect a geometry in this case.
Report N/A instead.

Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
Cc: Martin Wilck <martin.wilck@suse.com>
---
 disk-utils/blockdev.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/disk-utils/blockdev.c b/disk-utils/blockdev.c
index f1067c815..ab18cfa66 100644
--- a/disk-utils/blockdev.c
+++ b/disk-utils/blockdev.c
@@ -455,6 +455,7 @@ static void report_device(char *device, int quiet)
     long ra;
     unsigned long long bytes;
     uint64_t start = 0;
+    char start_str[11] = "";
     struct stat st;
 
     fd = open(device, O_RDONLY | O_NONBLOCK);
@@ -476,19 +477,21 @@ static void report_device(char *device, int quiet)
             disk != st.st_rdev) {
 
             if (ul_path_read_u64(pc, &start, "start") != 0)
-                err(EXIT_FAILURE,
-                    _("%s: failed to read partition start from sysfs"),
-                    device);
+                /* TRANSLATORS: Start sector not available. Max. 10
letters. */
+                sprintf(start_str, "%10s", _("N/A"));
         }
         ul_unref_path(pc);
     }
+    if (start_str[0] == 0)
+        sprintf(start_str, "%10ju", start);
+
     if (ioctl(fd, BLKROGET, &ro) == 0 &&
         ioctl(fd, BLKRAGET, &ra) == 0 &&
         ioctl(fd, BLKSSZGET, &ssz) == 0 &&
         ioctl(fd, BLKBSZGET, &bsz) == 0 &&
         blkdev_get_size(fd, &bytes) == 0) {
-        printf("%s %5ld %5d %5d %10ju %15lld   %s\n",
-               ro ? "ro" : "rw", ra, ssz, bsz, start, bytes, device);
+        printf("%s %5ld %5d %5d %s %15lld   %s\n",
+               ro ? "ro" : "rw", ra, ssz, bsz, start_str, bytes, device);
     } else {
         if (!quiet)
             warnx(_("ioctl error on %s"), device);
-- 
2.25.1

-- 
Best Regards / S pozdravem,

Stanislav Brabec
software developer
---------------------------------------------------------------------
SUSE LINUX, s. r. o.                         e-mail: sbrabec@suse.com
Křižíkova 148/34 (Corso IIa)                    tel: +420 284 084 060
186 00 Praha 8-Karlín                          fax:  +420 284 084 001
Czech Republic                                    http://www.suse.cz/
PGP: 830B 40D5 9E05 35D8 5E27 6FA3 717C 209F A04F CD76



^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, back to index

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-31 23:35 [PATCH] blockdev: Don't fail on missing start sector Stanislav Brabec
2020-06-01  8:13 ` Karel Zak
2020-06-02  1:52   ` Stanislav Brabec
2020-06-03 15:16 ` Karel Zak
2020-06-05  8:06   ` Karel Zak
2020-06-13 20:52     ` Stanislav Brabec

Util-Linux Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/util-linux/0 util-linux/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 util-linux util-linux/ https://lore.kernel.org/util-linux \
		util-linux@vger.kernel.org
	public-inbox-index util-linux

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.util-linux


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git