12-05-2006
Replace string B depending on occurence of string A
Depending upon the occurence of string 'xyz', I want to remove -t from the input file.
There is not a fixed length input file.
Any suggestions
Input file:
this is xyz line -t of the data
this is line 2 of -t of the data
xyz this is line 3 of -t the file
this is line xyz of the -t file
this is line 5 of the file -t
Ouput file:
this is xyz line of the data
this is line 2 of -t of the data
xyz this is line 3 of the file
this is line xyz of the file
this is line 5 of the file -t
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LEARN ABOUT DEBIAN
strsub
STRSUB(3pub) C Programmer's Manual STRSUB(3pub)
NAME
strsub - substitute first occurence of pattern with another string
SYNOPSIS
#include <publib.h>
char *strsub(char *str, const char *pat, const char *sub);
DESCRIPTION
strsub finds the first occurence of the pattern pat in the string str (using a method similar to strstr(3), i.e., no regular expressions),
and replaces it with sub. If pat does not occur in str, no substitution is made.
Of course, if sub is an empty string, the pattern is deleted from the string.
RETURN VALUE
strsub returns a pointer to the first character after the substitution, or NULL if no substitution was made.
EXAMPLE
To substitute up to two occurences of "foo" with "bar" in a line, one might do the following.
p = strsub(line, "foo", "bar");
if (p != NULL)
strsub(line, "foo", "bar");
SEE ALSO
publib(3), strstr(3), strgsub(3)
AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual STRSUB(3pub)