From: Karel Zak <kzak@redhat.com>
Date: Tue, 15 Sep 2009 20:55:05 +0000 (+0200)
Subject: libblkid: allow to read in sectors
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce011388e1e7afa16b8051cdb870ebd9064017d5;p=util-linux

libblkid: allow to read in sectors

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/shlibs/blkid/src/blkidP.h b/shlibs/blkid/src/blkidP.h
index b6fa5634..6187e1ee 100644
--- a/shlibs/blkid/src/blkidP.h
+++ b/shlibs/blkid/src/blkidP.h
@@ -371,6 +371,8 @@ extern void blkid_free_dev(blkid_dev dev);
 unsigned char *blkid_probe_get_buffer(blkid_probe pr,
                                 blkid_loff_t off, blkid_loff_t len);
 
+extern unsigned char *blkid_probe_get_sector(blkid_probe pr, unsigned int sector);
+
 extern int blkid_probe_get_dimension(blkid_probe pr,
 	                blkid_loff_t *off, blkid_loff_t *size);
 
diff --git a/shlibs/blkid/src/probe.c b/shlibs/blkid/src/probe.c
index d3da7165..b72bcb40 100644
--- a/shlibs/blkid/src/probe.c
+++ b/shlibs/blkid/src/probe.c
@@ -720,6 +720,13 @@ done:
 	return count ? 0 : 1;
 }
 
+/* same sa blkid_probe_get_buffer() but works with 512-sectors */
+unsigned char *blkid_probe_get_sector(blkid_probe pr, unsigned int sector)
+{
+	return pr ? blkid_probe_get_buffer(pr,
+			((blkid_loff_t) sector) << 9, 0x200) : NULL;
+}
+
 struct blkid_prval *blkid_probe_assign_value(
 			blkid_probe pr, const char *name)
 {