行の最大および最小長制限

少し追加:

printfテキストの基本形式は次のとおりです。

%s      # Print as is
%10     # Right justify minimum width print 10
%-10    # Left justify minimum width print 10
%.10    # Max width 10
%10.10  # Max width 10, min width print 10
%-10.10 # Left justify, max width 10, min width print 10
%*s     # Same as above, but get number from arguments
%-*s    # Same as above, but get number from arguments
...

非常に長いパターンを得るとき、どこや何かを追跡するのは少し混乱するかもしれません。簡単にする1つの方法は次のとおりです。

#!/bin/bash

usage()
{
    printf "Usage: %s <FILE>\n" "$(basename "$0")" >&2
    [[ -n "$1" ]] && echo "$1"
    exit 1
}

if [[ ! -t 0 ]]; then
    : # Piped to
elif [[ $# -eq 0 ]]; then
    usage "Missing file."
elif [[ ! -r "$1" ]]; then
    usage "Unable to read \`$1'."
else
    # Accept input from file to file descriptor 0, aka stdin
    exec 0< "$1"
fi

fmt=""
fmt="$fmt%s|"       # F1
fmt="$fmt%-24.24s|" # F2
fmt="$fmt%-30s|"    # F3
fmt="$fmt%-10.10s|" # F4
fmt="$fmt%-10.10s|" # F5
fmt="$fmt%-10s|"    # F6
fmt="$fmt%-2.2s|"   # F7
fmt="$fmt%-2.2s|\n" # F8

# Set IFS to newline and bar and read fields
# assigning them to f1 ... f8
#
while IFS=$'\n'"|" read f1 f2 f3 f4 f5 f6 f7 f8; do
    printf "$fmt"\
    "$f1" "$f2" "$f3" "$f4" \
    "$f5" "$f6" "$f7" "$f8"
done <&0

または。たとえば、

while IFS=$'\n'"|" read f1 f2 f3 f4 f5 f6 f7 f8; do
    printf "%s|%-*.*s|%-*s\n" \
    "$f1" \
    24 24 "$f2" \
    30 "$f3"
done < "input"

単に線の解析であれば、awkは良い選択です。たとえば、

#!/usr/bin/awk -f

BEGIN {FS="|"}
/^/ {
    printf "%s|%-24.24s|%-30s|%-10.10s|%-10.10s|%-10s\n",
        $1, $2, $3, $4, $5, $6
}

または：

#!/usr/bin/awk -f

BEGIN {
    FS="|"
}
/^/ {
    printf "%s|%-*.*s|%-*s|%-*.*s|%-*.*s|%-*s\n",
        $1,
        24, 24, $2,
        30, $3,
        10, 10, $4,
        10, 10, $5,
        10, $6
}