Sed - Revision history

Admin: /* References */

2019-03-30T19:39:14Z

References

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	* One-line sed commands: http://sed.sourceforge.net/grabbag/tutorials/sed1line.txt		* One-line sed commands: http://sed.sourceforge.net/grabbag/tutorials/sed1line.txt

	* O'Reilly Sed/Awk book		* O'Reilly Sed/Awk book: https://docstore.mik.ua/orelly/unix/sedawk/
	** Chapter 5: Basic sed commands http://docstore.mik.ua/orelly/unix/sedawk/ch05_01.htm		** Chapter 5: Basic sed commands http://docstore.mik.ua/orelly/unix/sedawk/ch05_01.htm
	** Chapter 6: Advanced sed commands http://docstore.mik.ua/orelly/unix/sedawk/ch06_01.htm		** Chapter 6: Advanced sed commands http://docstore.mik.ua/orelly/unix/sedawk/ch06_01.htm

Admin: /* Renaming files, case 2 */

2019-03-30T19:38:33Z

Renaming files, case 2

← Older revision		Revision as of 19:38, 30 March 2019
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	</pre>		</pre>

	The trick for doing this was to ~~combine~~ the <code>\1</code> and <code>\2</code> with double-quotes to ~~rename~~ the ~~files~~, and to feed that to xargs for the renaming.		The trick for doing this was to parse the name into three pieces: the piece appearing before " - ", the piece appearing after " - " and before ".mobi", and the ".mobi" file extension.

			Combine the first two pieces <code>\1</code> and <code>\2</code> with double-quotes to reorder the title and author, and feed that new file name to xargs for the renaming.

	{{Ambox		{{Ambox

Admin: /* e command */

2019-03-30T19:36:09Z

e command

← Older revision		Revision as of 19:36, 30 March 2019
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	===e command===		===e command===

	To output the results of a command into a new line, the <code>e</code> command can be used. For example, the contents of a small file (called ~~small_file~~ in this example) could be inserted into a line of the file ~~test_file~~:		To output the results of a command into a new line, the <code>e</code> command can be used. For example, the contents of a small file (called new_item in this example) could be inserted into a line of the file list_file. Here are the two files:

	<pre>		<pre>
			$ cat list_file
			Phoenix
			New York
			San Francisco
			Orlando
			Atlanta
			Seattle
			San Antonio
			St. Louis


	$ cat new_item		$ cat new_item
	Boston		Boston
			</pre>

			Now we can prepend the contents of the command "cat new_item" to the result of the search "/New York/", which results in the line Boston appearing above the line New York:

			<pre>
	$ sed '/New York/e cat new_item' list_file		$ sed '/New York/e cat new_item' list_file
	Phoenix		Phoenix
	Boston		Boston
	New York ~~City~~		New York
	San Francisco		San Francisco
	Orlando		Orlando
Line 303:		Line 318:
	St. Louis		St. Louis
	</pre>		</pre>

	~~The new line, created from the output of the command <code>cat new_item</code>, is inserted in a new line, above the line matching the search pattern.~~



	=Examples=		=Examples=

Admin at 17:34, 20 December 2011

2011-12-20T17:34:38Z

← Older revision		Revision as of 17:34, 20 December 2011
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	Certainly not the most elegant solution, but it was necessary because of some kind of problem with xargs, whitespaces, and double quotes.		Certainly not the most elegant solution, but it was necessary because of some kind of problem with xargs, whitespaces, and double quotes.

			==Renaming Files to put Path in Name==

			I wanted to move a bunch of files from:

			<pre>
			Pictures/Centralia/some category/some category 1.jpg
			Pictures/Centralia/some category/some category 2.jpg
			Pictures/Centralia/some category/some category 3.jpg

			Pictures/Centralia/another category/another category 1.jpg
			Pictures/Centralia/another category/another category 2.jpg
			Pictures/Centralia/another category/another category 3.jpg
			</pre>

			to

			<pre>
			Pictures/Centralia_some_category_1.jpg
			...

			Pictures/Centralia_another_category_1.jpg
			...
			</pre>

			To do this, I used the following command:

			<pre>
			find Centralia -name "*.jpg" \| \
			sed -e 'p;s/\//_/g' \
			-e 's/ /_/g' \
			-e 's/_$[a-z]\{1,\}_[a-z]\{1,\}_$\{3\}$[0-9]$/_\1\2/g' \| \
			sed -e 's/^/"/' -e 's/$/"/' \| \
			xargs -n2 mv
			</pre>

			The find command finds all the files I wanted to rename.

			The second and third lines replace slashes with underscores.

			The fourth line looks for an instance of a one-to-three "some category"

	=References=		=References=

Admin: /* Renaming files */

2011-06-17T08:35:13Z

Renaming files

@@ Line 310: / Line 310: @@
 =Examples=
-==Renaming files==
+==Renaming files, case 1==
 I had a set of simulation outputs whose names looked like this:
@@ Line 435: / Line 435: @@
 I ended up using [[Awk]] to check if the arguments being fed to mv were duplicates: see [[Awk#Renaming_Files.2C_If_Names_Not_Duplicates|Awk#Renaming Files, If Names Not Duplicates]]
 =References=

Admin at 16:40, 28 May 2011

2011-05-28T16:40:23Z

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	{{Programs}}		{{Programs}}
			{{Unix Programs}}
	{{Languages}}		{{Languages}}

Admin at 16:40, 28 May 2011

2011-05-28T16:40:17Z

← Older revision		Revision as of 16:40, 28 May 2011
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	* Sed info file: http://www.gnu.org/software/sed/manual/sed.html#Common-Commands		* Sed info file: http://www.gnu.org/software/sed/manual/sed.html#Common-Commands

	~~[[Category:Computers]]~~
	~~[[Category:~~Programs]]
			{{Programs}}
			{{Languages}}

Admin: /* Renaming files */

2011-05-28T16:37:30Z

Renaming files

← Older revision		Revision as of 16:37, 28 May 2011
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	</pre>		</pre>

	To do this, I used the following sed script:
			{{Ambox
			\|image=none
			\|type=delete
			\|text=To do this, I used the following sed script:

	<source lang="bash">		<source lang="bash">
Line 353:		Line 357:
	\| xargs -I {} -n2 -t mv		\| xargs -I {} -n2 -t mv
	</source>		</source>
			}}

	I will explain this three-part command, as follows:		I will explain this three-part command, as follows:

Admin: /* Renaming files */

2011-05-28T05:43:49Z

Renaming files

@@ Line 429: / Line 429: @@
 The reason is, Sed would still print two things, the filename and the transformed filename, but if it had already transformed the filename then it would not be transformed, leading to duplicate arguments fed to the mv command.
-I ended up using [[Awk]] to check if the arguments being fed to mv were duplicates: see [[Awk#Renaming_Files.2C_If_Names_Not_Duplicates]]
+I ended up using [[Awk]] to check if the arguments being fed to mv were duplicates: see [[Awk#Renaming_Files.2C_If_Names_Not_Duplicates|Awk#Renaming Files, If Names Not Duplicates]]
 =References=

Admin: /* Renaming files */

2011-05-28T05:29:13Z

Renaming files

← Older revision		Revision as of 05:29, 28 May 2011
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	</source>		</source>

			'''Postscript''': I had to modify this script and re-run it in the same directory, which caused a bunch of errors like this:

			<pre>
			mv: `i059_j072_k072' and `i059_j072_k072' are the same file
			mv i042_j072_k072 i042_j072_k072
			mv: `i042_j072_k072' and `i042_j072_k072' are the same file
			mv i018_j072_k072 i018_j072_k072
			mv: `i018_j072_k072' and `i018_j072_k072' are the same file
			mv i026_j072_k072 i026_j072_k072
			mv: `i026_j072_k072' and `i026_j072_k072' are the same file
			mv i016_j072_k072 i016_j072_k072
			mv: `i016_j072_k072' and `i016_j072_k072' are the same file
			mv i142_j072_k072 i142_j072_k072
			mv: `i142_j072_k072' and `i142_j072_k072' are the same file
			mv i129_j072_k072 i129_j072_k072
			mv: `i129_j072_k072' and `i129_j072_k072' are the same file
			mv i135_j072_k072 i135_j072_k072
			mv: `i135_j072_k072' and `i135_j072_k072' are the same file
			mv i125_j072_k072 i125_j072_k072
			mv: `i125_j072_k072' and `i125_j072_k072' are the same file
			mv i127_j072_k072 i127_j072_k072
			mv: `i127_j072_k072' and `i127_j072_k072' are the same file
			mv i119_j072_k072 i119_j072_k072
			mv: `i119_j072_k072' and `i119_j072_k072' are the same file
			mv i114_j072_k072 i114_j072_k072
			mv: `i114_j072_k072' and `i114_j072_k072' are the same file
			mv i100_j072_k072 i100_j072_k072
			mv: `i100_j072_k072' and `i100_j072_k072' are the same file
			</pre>

			The reason is, Sed would still print two things, the filename and the transformed filename, but if it had already transformed the filename then it would not be transformed, leading to duplicate arguments fed to the mv command.

			I ended up using [[Awk]] to check if the arguments being fed to mv were duplicates: see [[Awk#Renaming_Files.2C_If_Names_Not_Duplicates]]

			The final script looks like this:

			<source lang="bash">
			#!/bin/sh

			ls -1c i* \| /bin/sed \
			-e 'p' \
			-e 's/i$[0-9]\{1\}$_/i00\1_/' \
			-e 's/i$[0-9]\{2\}$_/i0\1_/' \
			-e 's/j$[0-9]\{1\}$_/j00\1_/' \
			-e 's/j$[0-9]\{2\}$_/j0\1_/' \
			-e 's/k$[0-9]\{1\}$$/k00\1/' \
			-e 's/k$[0-9]\{2\}$$/k0\1/' \
			\| awk '{ if( $1 == $2 ) print ""; else print $0 }' \
			\| xargs -I {} -n2 -t mv
			</source>

	=References=		=References=