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Full Discussion: Changing field X in file
Top Forums Shell Programming and Scripting Changing field X in file Post 302756773 by jnojr on Wednesday 16th of January 2013 01:27:53 PM
Old 01-16-2013
Thanks, msabhi. A minor nit is that removes all of the whitespace (the original uses tabs to line everything up), which makes it a little less readable. I'm guessing that's because awk sees any whitespace as the field separator, but FS is a single whitespace character? Is there a way to preserve existing whitespace?

Also, what is the "1" at the end of the recipe for?
 

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STRLTRIM(3pub)						       C Programmer's Manual						    STRLTRIM(3pub)

NAME
strltrim - remove leading whitespace from string SYNOPSIS
#include <publib.h> char *strltrim(char *s); DESCRIPTION
strltrim removes all leading whitespace characters from the beginning of a string, by moving everything starting from the first non-white- space character to the beginning of the string. As whitespace is counted everything for which isspace(3) returns true. RETURN VALUE
strltrim returns its argument. EXAMPLE
To remove all indentation from all lines in a program, you might do the following: #include <publib.h> int main(void) { char line[512]; while (fgets(line, sizeof(line), stdio) != NULL) { strltrim(line); printf("%s", line); } return 0; } SEE ALSO
publib(3), strrtrim(3), strtrim(3), isspace(3) AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi) Publib C Programmer's Manual STRLTRIM(3pub)
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