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Top Forums Shell Programming and Scripting How to change a segment in a particular position Post 302335929 by ananthmm on Monday 20th of July 2009 07:31:25 PM
Old 07-20-2009
How to change a segment in a particular position

I need help in removing a leading zero in a particular position.
For eg.: XYZ*04567472*0099*020091231*0123*0.12

In the above line, I want to replace "*0123" with "123" and "0.12" with ".12". I want to remove the leading zero only in position number 4 and 5 (the bolded segments)

I was able to replace 0.12 with .12 using --- sed 's/\*00*\./\*\./g'

But, I am unable to replace "0123" with "123". I tried using
sed '/^XYZ\*/s/\*00*/\*/4'. But it is not working.
Using, sed '/^XYZ\*/s/\*00*/\*/g' removes all leading zeros (which I dont want).

Any help with this is much appreciated.

Thanks,
Ananth.
 

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curs_instr(3X)															    curs_instr(3X)

NAME
instr, innstr, winstr, winnstr, mvinstr, mvinnstr, mvwinstr, mvwinnstr - get a string of characters from a curses window SYNOPSIS
#include <curses.h> int instr(char *str); int innstr(char *str, int n); int winstr(WINDOW *win, char *str); int winnstr(WINDOW *win, char *str, int n); int mvinstr(int y, int x, char *str); int mvinnstr(int y, int x, char *str, int n); int mvwinstr(WINDOW *win, int y, int x, char *str); int mvwinnstr(WINDOW *win, int y, int x, char *str, int n); DESCRIPTION
These routines return a string of characters in str, extracted starting at the current cursor position in the named window. Attributes are stripped from the characters. The four functions with n as the last argument return a leading substring at most n characters long (exclu- sive of the trailing NUL). RETURN VALUE
All of the functions return ERR upon failure, or the number of characters actually read into the string. X/Open defines no error conditions. In this implementation, if the window parameter is null or the str parameter is null, a zero is returned. NOTES
Note that all routines except winnstr may be macros. PORTABILITY
SVr4 does not document whether a length limit includes or excludes the trailing NUL. The ncurses library extends the XSI description by allowing a negative value for n. In this case, the functions return the string ending at the right margin. SEE ALSO
curses(3X). curs_instr(3X)
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