change file extension from root and subdirectories
Hello, my first post!
I'd appreciate help with this script, I'm new to this.
I have a media directory where I want to batch convert image file names from .img to .iso.
I've tried but get:
$ ./img2iso2.sh
./img2iso2.sh: line 13: syntax error: unexpected end of file
This is my unfinished script:
Code:
#!/bin/bash
# Set the video directory here
VIDEO_ROOT_DIRECTORY="/Users/astrid/NFS/scripts/img2iso/";
# Check if the directory exist or not
if [ -d "$VIDEO_ROOT_DIRECTORY" ]; then
cd $VIDEO_ROOT_DIRECTORY
else
print "ERROR: Unable to reach directory - or it does not exist!";
fi
for imgfile do
case $imgfile *.img
do mv $imgfile.img $imgfile.iso;
done
print "img-files renamed to iso";
esac
done
exit 0
I assume this doesn't check subdirectories, even though I'd like it to. Maybe a combination of find, grep and sed should be used instead? These commands seems to work marvels in almost any situation.
Also, I'd think it would be smart to include some sort of check:
if there is a file called image.iso and one called image.img in the same (sub)directory; I'd like to change the name of that .img file to image-1.iso. But I don't even know where to start with this check!
If I understand the error message there's a problem with quoting? I've made so many trials that I can't remember where I started anymore.
Any help is greatly appreciated.
EDIT:
Searching the forum I found a better way to do the replacement of the file extension (here), but I wasn't so lucky with the subdirs.
How do you write a shell script that change the extension of all the files?
e.g
chext rtf doc
where .rtf is the original extension
and .doc is the new extension
is it something to do with basename?
do I need a for loop?
Please help!
Unix SuperNewbie (4 Replies)
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thanks (1 Reply)
Discussion started by: goya
1 Replies
LEARN ABOUT CENTOS
pivot_root
PIVOT_ROOT(8) System Administration PIVOT_ROOT(8)NAME
pivot_root - change the root filesystem
SYNOPSIS
pivot_root new_root put_old
DESCRIPTION
pivot_root moves the root file system of the current process to the directory put_old and makes new_root the new root file system. Since
pivot_root(8) simply calls pivot_root(2), we refer to the man page of the latter for further details.
Note that, depending on the implementation of pivot_root, root and cwd of the caller may or may not change. The following is a sequence for
invoking pivot_root that works in either case, assuming that pivot_root and chroot are in the current PATH:
cd new_root
pivot_root . put_old
exec chroot . command
Note that chroot must be available under the old root and under the new root, because pivot_root may or may not have implicitly changed the
root directory of the shell.
Note that exec chroot changes the running executable, which is necessary if the old root directory should be unmounted afterwards. Also
note that standard input, output, and error may still point to a device on the old root file system, keeping it busy. They can easily be
changed when invoking chroot (see below; note the absence of leading slashes to make it work whether pivot_root has changed the shell's
root or not).
OPTIONS -V, --version
Output version information and exit.
-h, --help
Display help and exit.
EXAMPLES
Change the root file system to /dev/hda1 from an interactive shell:
mount /dev/hda1 /new-root
cd /new-root
pivot_root . old-root
exec chroot . sh <dev/console >dev/console 2>&1
umount /old-root
Mount the new root file system over NFS from 10.0.0.1:/my_root and run init:
ifconfig lo 127.0.0.1 up # for portmap
# configure Ethernet or such
portmap # for lockd (implicitly started by mount)
mount -o ro 10.0.0.1:/my_root /mnt
killall portmap # portmap keeps old root busy
cd /mnt
pivot_root . old_root
exec chroot . sh -c 'umount /old_root; exec /sbin/init'
<dev/console >dev/console 2>&1
SEE ALSO chroot(1), mount(8), pivot_root(2), switch_root(8), umount(8)AVAILABILITY
The pivot_root command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux August 2011 PIVOT_ROOT(8)
02-15-2008
