两个给定日期之间的bash循环 [英] bash loop between two given dates

问题描述

我想创建一个脚本，将遍历有写成如下格式的文件名的文件。yyyymmdd.hh.filename

I'm trying to create a script that will loop through files that have their filenames written in the following format: yyyymmdd.hh.filename.

该脚本调用：

./loopscript.sh 20091026.00 23
./loopscript.sh 20091026.11 15
./loopscript.sh 20091026.09 20091027.17

我们需要的是脚本检查这些两个给定日期/小时之间的每个小时。

The need is for the script to check each hour between those two given dates/hours.

例如。

cat 20091026.00.filename |more
cat 20091026.01.filename |more
...
cat 20091026.23.filename |more
cat 20091027.01.filename |more
cat 20091027.02.filename |more
...

等。

任何想法如何着手呢？我没有与标准0任何困难 - X循环。或简单的for循环。只是不知道如何去上面。

any idea how to go about this? I don't have any difficulty with standard 0 - x loops. or simple for loops. Just not sure how to go about the above.

推荐答案

要处理两个给定日期/小时之间的每个文件，可以使用以下命令：

To process each file between two given date/hours, you can use the following:

#!/usr/bin/bash
#set -x

usage() {
    echo 'Usage: loopscript.sh <from> <to>'
    echo '       <from> MUST be yyyymmdd.hh or empty, meaning 00000000.00'
    echo '       <to> can be shorter and is affected by <from>'
    echo '         e.g., 20091026.00       27.01 becomes'
    echo '               20091026.00 20091027.01'
    echo '         If empty, it is set to 99999999.99'
    echo 'Arguments were:'
    echo "   '${from}'"
    echo "   '${to}'"
}

# Check parameters.

from="00000000.00"
to="99999999.99"
if [[ ! -z "$1" ]] ; then
    from=$1
fi
if [[ ! -z "$2" ]] ; then
    to=$2
fi
## Insert this to default to rest-of-day when first argument
##    but no second argument. Basically just sets second
##    argument to 23 so it will be transformed to end-of-day.
#if [[ ! -z "$1"]] ; then
#    if [[ -z "$2"]] ; then
#        to=23
#    fi
#fi

if [[ ${#from} -ne 11 || ${#to} -gt 11 ]] ; then
    usage
    exit 1
fi

# Sneaky code to modify a short "to" based on the start of "from".
# ${#from} is the length of ${from}.
# $((${#from}-${#to})) is the length difference between ${from} and ${to}
# ${from:0:$((${#from}-${#to}))} is the start of ${from} long enough
#   to make ${to} the same length.
# ${from:0:$((${#from}-${#to}))}${to} is that with ${to} appended.
# Voila! Easy, no?

if [[ ${#to} -lt ${#from} ]] ; then
    to=${from:0:$((${#from}-${#to}))}${to}
fi

# Process all files, checking that they're inside the range.

echo "From ${from} to ${to}"
for file in [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9].[0-9][0-9].* ; do
    if [[ ! ( ${file:0:11} < ${from} || ${file:0:11} > ${to} ) ]] ; then
        echo "   ${file}"
    fi
done

当您创建的文件 20091026.00。$ {RANDOM} 到 20091028.23。$ {RANDOM} 包容性，这是一对夫妇的样品运行的：

When you create the files 20091026.00.${RANDOM} through 20091028.23.${RANDOM} inclusive, this is a couple of sample runs:

pax> ./loopscript.sh 20091026.07 9
From 20091026.07 to 20091026.09
   20091026.07.21772
   20091026.08.31390
   20091026.09.9214
pax> ./loopscript.sh 20091027.21 28.02
From 20091027.21 to 20091028.02
   20091027.21.22582
   20091027.22.30063
   20091027.23.29437
   20091028.00.14744
   20091028.01.6827
   20091028.02.10366
pax> ./loopscript.sh 00000000.00 99999999.99 # or just leave off the parameters.
   20091026.00.25772
   20091026.01.25964
   20091026.02.21132
   20091026.03.3116
   20091026.04.6271
   20091026.05.14870
   20091026.06.28826
   : : :
   20091028.17.20089
   20091028.18.13816
   20091028.19.7650
   20091028.20.20927
   20091028.21.13248
   20091028.22.9125
   20091028.23.7870

正如你所看到的，第一个参数必须是正确的格式 yyyymmdd.hh 的。第二个参数可以更短，因为它继承了第一个参数的开始，使其正确的长度。

As you can see, the first argument must be of the correct format yyyymmdd.hh. The second argument can be shorter since it inherits the start of the first argument to make it the correct length.

这只是尝试处理存在的文件（从 LS ）和正确的格式，的不的范围内的每一个日期/小时。这将是，如果你有稀疏的文件（包括在开始和范围的端部），因为它不需要检查存在的文件更高效

This only attempts to process files that exist (from ls) and of the correct format, not every date/hour within the range. This will be more efficient if you have sparse files (including at the start and the end of the range) since it doesn't need to check that the files exist.

顺便说一句，这是创建的测试文件的命令，如果你有兴趣：

By the way, this is the command that created the test files, if you're interested:

pax> for dt in 20091026 20091027 20091028 ; do
         for tm in 00 01 02 ... you get the idea ... 21 22 23 ; do
             touch $dt.$tm.$RANDOM
         done
     done

的请不要输入，在逐字，然后抱怨说，它创建的文件，如：的

20091026.you.12345
20091028.idea.77

的所以它在code宽度适合我只下调行的： - ）

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