From: Karel Zak <kzak@redhat.com>
Date: Tue, 15 Sep 2009 20:53:25 +0000 (+0200)
Subject: libblkid: allow to change dimension of probing area
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f319b5cadd9f7f9b5d9f807faf645768aa8ecccc;p=util-linux

libblkid: allow to change dimension of probing area

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

diff --git a/shlibs/blkid/src/blkidP.h b/shlibs/blkid/src/blkidP.h
index de26ab13..b6fa5634 100644
--- a/shlibs/blkid/src/blkidP.h
+++ b/shlibs/blkid/src/blkidP.h
@@ -371,6 +371,12 @@ 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 int blkid_probe_get_dimension(blkid_probe pr,
+	                blkid_loff_t *off, blkid_loff_t *size);
+
+extern int blkid_probe_set_dimension(blkid_probe pr,
+	                blkid_loff_t off, blkid_loff_t size);
+
 /* returns superblok according to 'struct blkid_idmag' */
 #define blkid_probe_get_sb(_pr, _mag, type) \
 			((type *) blkid_probe_get_buffer((_pr),\
diff --git a/shlibs/blkid/src/probe.c b/shlibs/blkid/src/probe.c
index a3d08114..d3da7165 100644
--- a/shlibs/blkid/src/probe.c
+++ b/shlibs/blkid/src/probe.c
@@ -509,6 +509,39 @@ int blkid_probe_set_device(blkid_probe pr, int fd,
 	return 0;
 }
 
+int blkid_probe_get_dimension(blkid_probe pr,
+		blkid_loff_t *off, blkid_loff_t *size)
+{
+	if (!pr)
+		return -1;
+
+	*off = pr->off;
+	*size = pr->size;
+	return 0;
+}
+
+int blkid_probe_set_dimension(blkid_probe pr,
+		blkid_loff_t off, blkid_loff_t size)
+{
+	if (!pr)
+		return -1;
+
+	DBG(DEBUG_LOWPROBE, printf(
+		"changing probing area: size=%llu, off=%llu "
+		"-to-> size=%llu, off=%llu\n",
+		(unsigned long long) pr->size,
+		(unsigned long long) pr->off,
+		(unsigned long long) size,
+		(unsigned long long) off));
+
+	pr->off = off;
+	pr->size = size;
+
+	blkid_probe_reset_buffer(pr);
+
+	return 0;
+}
+
 /**
  * blkid_do_probe:
  * @pr: prober