longlines

#!/bin/bash
##############################################################################
#
# NAME:         longlines
#
# DESCRIPTION:  Show the lines that exceed a given number of characters.
#               The output shows the file, line number and contents.
#               If the output is redirected to a file, sch file can then be
#               used with Vim's quickFix mode.
#
# USAGE:        longlines [-l MAX_LENGTH] FILE [ FILE2 [FILE 3...]]
#                 -h                Show usage
#                 -l MAX_LENGTH     Maximum allowed line length
#
# DEPENDENCIES: None  
#
##############################################################################
#

DEFAULT_LINE_LENGTH=80

#-----------------------------------------------------------------------------
usage()
{
    sed -e 's/^    //' <<'USAGE'
    Usage:

    longlines [-l MAX_LENGTH] FILE [ FILE2 [FILE 3...]]

      -h                Show usage
      -l MAX_LENGTH     Maximum allowed line length

USAGE
    exit $1
}
#-----------------------------------------------------------------------------

# Only asking for help
[[ $1 = '-h' ]] && usage 0

# How long the lines can be
if [[ $1 = '-l' ]]
then
    linelen=$2
    shift
    shift
else
    linelen=$DEFAULT_LINE_LENGTH
fi

# Still need at least a file to check
[[ $# = 0 ]] && usage 1

awk -v linelen=$linelen '
{
    if (length() > linelen)
        printf("%s:%d:%s\n", FILENAME, NR, $0);
}' "$@"