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Top Forums Shell Programming and Scripting Printing 1st column to lower case using awk Post 302317222 by pinnacle on Monday 18th of May 2009 10:35:21 AM
Old 05-18-2009
Printing 1st column to lower case using awk

I want to print the 1st field in a comma seperated file to lower case and the rest the case they are.
I tried this

Code:
nawk -F"," '{print tolower($0)}' OFS="," file


this converts whole line in to lower case i just want the first column to be converted.


The below doesnt work because in my file each record has different number of fields and i want all of them.

Code:
nawk -F"," '{print tolower($1),$2,$3,$4}' OFS="," file

Quote:
file:
abc,def,,,,,,
def,kik,iil,,,,,,,,
lmn,iio,oiu,kii,

Ouptut:
ABC,def,,,,,,
DEF,kik,iil,,,,,,,,
LMN,iio,oiu,kii,
Appreciate help
 

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TOLOWER(3)						   BSD Library Functions Manual 						TOLOWER(3)

NAME
tolower -- upper case to lower case letter conversion LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int tolower(int c); DESCRIPTION
The tolower() function converts an upper-case letter to the corresponding lower-case letter. RETURN VALUES
If the argument is an upper-case letter, the tolower() function returns the corresponding lower-case letter if there is one; otherwise the argument is returned unchanged. SEE ALSO
ctype(3), isalnum(3), isalpha(3), isascii(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), toascii(3), toupper(3), ascii(7) STANDARDS
The tolower() function conforms to ANSI X3.159-1989 (``ANSI C89''). CAVEATS
The argument to tolower() must be EOF or representable as an unsigned char; otherwise, the behavior is undefined. See the CAVEATS section of ctype(3) for more details. BSD
April 17, 2008 BSD
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