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Top Forums Shell Programming and Scripting Cut output to same byte position Post 302097201 by anbu23 on Wednesday 22nd of November 2006 08:36:13 AM
Old 11-22-2006
Code:
echo "ABC123DEF" | sed "s/\(.\{2\}\)\(.\{3\}\)\(.\{3\}\).*/\1   \3 /"

sed "s/\(.\{2\}\)\(.\{3\}\)\(.\{3\}\).*/\1 \3 /"

Match the first two char

sed "s/\(.\{2\}\)\(.\{3\}\)\(.\{3\}\).*/\1 \3 /"

Match next three char

sed "s/\(.\{2\}\)\(.\{3\}\)\(.\{3\}\).*/\1 \3 /"

Match next three char followed by the above three char

.* match till end of the line

I added three blanks between \1 and \3 and one blank after \3 to replace the respective char in input with blanks
 

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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/ksh93 /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/ksh93 /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/sfw/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. NOTES
Restricted shells should not be listed in /etc/shells. SunOS 5.11 1 Nov 2007 getusershell(3C)
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