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Top Forums Shell Programming and Scripting Putting multiple sed commands on a single line Post 302336221 by varelg on Tuesday 21st of July 2009 02:30:11 PM
Old 07-21-2009
Putting multiple sed commands on a single line

Hi,
I want to make sed write a part of fileA (first 7 lines) to file1 and the rest of fileA to file2 in a single call and single line in sed. If I do the following:
Code:
sed '1,7w file1; 8,$w file2' fileA

I get only one file named file1 plus all the characters following file1. If I try to use curly braces in any form, either on the same line or multiline (with labels), I get either an error message about opening "{" not matched or two files with the desired result but with the syntax as their filename. Even if I use sed with -e option and preceed each write command with -e, I get the opening-curly-brace-not-matched complain, like here:
Code:
sed -e '1,7{w file1}' -e '8,${w file2}' fileA

How to concatenate multiple write sed commands with only one call to sed and on one line?
 

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DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME
diff - print differences between two files SYNOPSIS
diff [-c | -e | -C n] [-br]file1 file2 OPTIONS
-C n Produce output that contains n lines of context -b Ignore white space when comparing -c Produce output that contains three lines of context -e Produce an ed-script to convert file1 into file2 -r Apply diff recursively to files and directories of EXAMPLES
diff file1 file2 # Print differences between 2 files diff -C 0 file1 file2 # Same as above diff -C 3 file1 file2 # Output three lines of context with every diff -c file1 file2 # Same diff /etc /dev # Compares recursively the directories /etc and /dev diff passwd /etc # Compares ./passwd to /etc/passwd DESCRIPTION
the same name, when file1 and file2 are both directories" difference encountered" Diff compares two files and generates a list of lines telling how the two files differ. Lines may not be longer than 128 characters. If the two arguments on the command line are both directories, diff recursively steps through all subdirectories comparing files of the same name. If a file name is found only in one directory, a diagnostic message is written to stdout. A file that is of either block special, character special or FIFO special type, cannot be compared to any other file. On the other hand, if there is one directory and one file given on the command line, diff tries to compare the file with the same name as file in the directory directory. SEE ALSO
cdiff(1), cmp(1), comm(1), patch(1). DIFF(1)
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