losetup example

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@1244 7fd9a85b-ad96-42d3-883c-3090e2eb8679

nuttx/Documentation/NuttShell.html

@@ -953,7 +953,24 @@ losetup [-o <offset>] [-r] &lt;dev-path&gt; &lt;file-path&gt;
 </pre></ul>
 <p>
   <b>Synopsis</b>.
-   Setup the loop device at &lt;dev-path&gt; to access the file at &lt;file-path&gt; as a block device:
+   Setup the loop device at &lt;dev-path&gt; to access the file at &lt;file-path&gt; as a block device.
+   Example:
+<ul><pre>
+nsh&gt; dd if=/dev/zero of=/tmp/image bs=512 count=512
+nsh&gt; ls -l /tmp
+/tmp:
+ -rw-rw-rw-   262144 IMAGE
+nsh&gt; losetup /dev/loop0 /tmp/image
+nsh&gt; ls -l /dev
+/dev:
+ brw-rw-rw-       0 loop0
+nsh&gt; mkfatfs /dev/loop0
+nsh&gt; mount -t vfat /dev/loop0 /mnt/example
+nsh&gt; ls -l /mnt
+ls -l /mnt
+/mnt:
+ drw-rw-rw-       0 example/
+</pre></ul>
 </p>
 
 <a <p><b>Command Syntax 2:</b></p>

nuttx/examples/nsh/README.txt

@@ -341,6 +341,23 @@ o losetup [-d <dev-path>] | [[-o <offset>] [-r] <ldev-path> <file-path>]
 
     losetup [-o <offset>] [-r] <dev-path> <file-path>
 
+  Example:
+
+    nsh> dd if=/dev/zero of=/tmp/image bs=512 count=512
+    nsh> ls -l /tmp
+    /tmp:
+     -rw-rw-rw-   262144 IMAGE
+    nsh> losetup /dev/loop0 /tmp/image
+    nsh> ls -l /dev
+    /dev:
+     brw-rw-rw-       0 loop0
+    nsh> mkfatfs /dev/loop0
+    nsh> mount -t vfat /dev/loop0 /mnt/example
+    nsh> ls -l /mnt
+    ls -l /mnt
+    /mnt:
+     drw-rw-rw-       0 example/
+
 o ls [-lRs] <dir-path>
 
   Show the contents of the directory at <dir-path>.  NOTE: