linux - 文件计数程序是 shell 不太工作

Question

#!/bin/bash
# File Count


if (( $# < 2 )) 
then
echo "${0}: ERROR: Incorrect number of arguments entered." 1>&2 
echo "${0}: USAGE: ${0} <directory> <filename>" 1>&2 
exit 1 
fi 

#checks for a valid number of arguments then exits if the user doesn't provide them and       shows an error message.

if [[ ! -d "${1}" ]] 
then 
echo "${0}: ERROR: directory ${1} does not exist." 1>&2 
echo "${0}: USAGE: ${0} <directory> <filename>" 1>&2 
exit 2 
fi
#checks for a the directory the user specified then exits if the user doesn't provide a valid directory and shows an error message.


if [[ -d "${1}" ]]
then
typeset -i directoryCount=0 
for files in $(ls) 
do 
((directoryCount++)) 
done

# if it's a directory file add 1 to the directory count


if [[ -x "${1}" ]]
then
typeset -i executableCount=0 
for files in $(ls) 
do 
((executableCount++)) 
done
# if it's a executable file add 1 to the executable count

if [[ -f "${1}" ]]
then
typeset -i ordinaryCount=0 
for files in $(ls) 
do 
((ordinaryCount++)) 
done
 # if it's a ordinary file add 1 to the ordinary count

echo The number of directory files is "${directoryCount}" 
echo The number of executable files is "${executableCount}"
echo The number of ordinary files is "${ordinaryCount}" 

#display file counts

虽然我认为我的路线是正确的，但在使用这个程序时遇到了问题。任何人都可以提供见解吗？以下是它需要做的事情。谢谢。

1. 如果目录的路径名为空，则退出并显示错误消息。
2. 如果给定目录的路径名没有命名现有目录，则退出错误信息。
3. 如果无法读取目录内容，则退出并显示错误消息。
4. 初始化变量以保存三个计数
5. 遍历目录中的每个文件:
6. 如果它是一个目录，就这样算；
7. 如果它是可执行的，就这样算
8. 如果是普通文件就这样算
9. 输出结果。

Answer 1

在阅读了您的脚本和描述后，我想先让您了解一下我准备的东西。我认为这是不言自明的。您的要求 1 和 3 未实现，至于 1，我认为回退到当前工作目录更有用。

这是非常基本的脚本，应该为您提供足够的增强空间:

#!/usr/bin/env bash

# Either set DIR upon calling or submit a parameter or fall back to the CWD
: ${DIR:="${1:-.}"}

if [ ! -d "${DIR}" ]; then
    echo "${0##*/}: ERROR: Directory '${DIR}' does not exist." 
    echo "${0##*/}: USAGE: ${0##*/} <directory>" 
    exit 1
else
    echo "Investigating directory: ${DIR}"
fi

function initVars() {
    directoryCount=0
    executableCount=0
    ordinaryCount=0
    unknownTypeCount=0
}

function checkOwnerExecutable() {
    local permStr=$1
    # return 0 if executable bit is set, otherwise 1
    [ "x${owner//x/}" != "x${owner}" ] && return 0 || return 1
}

initVars
while read entry; do
    #echo "entry: ${entry}"
    eval ${entry}
    case "$type" in
        "Directory")
            let directoryCount+=1
            ;;
        "Regular File")
            let ordinaryCount+=1
            checkOwnerExecutable $owner && let executableCount+=1
            ;;
        *)
            echo "Unknown type=$type with name=$name"
            let unknownTypeCount+=1
            ;;
    esac
done < <(stat -f 'name="%N" type="%HT" owner="%SHp" group="%SMp" other="%SLp"' ${DIR}/* ${DIR}/.*)

echo "The number of directory files is ${directoryCount}" 
echo "The number of executable files is ${executableCount}"
echo "The number of ordinary files is ${ordinaryCount}"
echo "The number of unknown type files is ${unknownTypeCount}" 

这是/tmp 的输出:

$ ./fileCount.sh /tmp
Investigating directory: /tmp
Unknown type=Socket with name=/tmp/textmate-501.sock
Unknown type=Socket with name=/tmp/.prl_pcsc_gate
The number of directory files is 11
The number of executable files is 1
The number of ordinary files is 4
The number of unknown type files is 2

它包括/计算“.”和“..”文件也作为目录。如果您不想这样，请在 while 循环结束时调整 stat 命令。