Question

我正在寻找一种在远程计算机上重命名日志文件的方法，一旦它达到80MB。例如，假设这是路径“ C：\ Program Files \ Test Folder \ TCP.Log”，一旦大于80MB，则应将其重命名为TCP1.log。重命名后，系统会自动生成一个名称为“ TCP.log”的新日志文件（重命名或删除后，系统会自动生成该文件）。一旦TCP.log再次达到80MB，powershell应该将其重命名为TCP2.Log，我该怎么做？

我已经尝试过该脚本，它将重命名为TCP1.Log，但是一旦再次运行它，它将说该文件已经存在，因此不会将其重命名为TCP2.LOG。

理想情况下，我想创建一个计划任务，如果远程计算机上的TCP.log文件大于80MB，它将运行并重命名。

Answer 1

我认为实用程序功能可以在以下情况下提供帮助：

function Rename-Unique {
    # Renames a file. If a file with that name already exists,
    # the function will create a unique filename by appending 
    # a sequence number to the name before the extension.
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)]
        [string]$Path
    )
    # Throw a bit nicer error than with [ValidateScript({Test-Path -Path $_ -PathType Leaf})]
    if (!(Test-Path -Path $Path -PathType Leaf)){
       Throw [System.IO.FileNotFoundException] "Rename-Unique: The file '$Path' could not be found."
    }

    # split the filename into a basename and an extension variable
    $baseName  = [System.IO.Path]::GetFileNameWithoutExtension($Path)
    $extension = [System.IO.Path]::GetExtension($Path)    # this includes the dot
    $folder    = Split-Path -Path $Path -Parent

    # get an array of all filenames (name only) of the files with a similar name already present in the folder
    $allFiles = @(Get-ChildItem $folder -Filter "$baseName*$extension" -File | Select-Object -ExpandProperty Name)
    # for PowerShell version < 3.0 use this
    # $allFiles = @(Get-ChildItem $folder -Filter "$baseName*$extension" | Where-Object { !($_.PSIsContainer) } | Select-Object -ExpandProperty Name)

    # construct the new filename / strip the path from the file name
    $newName = $baseName + $extension   # or use $newName = Split-Path $newName -Leaf

    if ($allFiles.Count) {
        $count = 1
        while ($allFiles -contains $newName) {
            $newName = "{0}{1}{2}" -f $baseName, $count++, $extension
        }
    }
    Write-Verbose "Renaming '$Path' to '$newName'"
    Rename-Item -Path $Path -NewName $newName -Force
}

在您的代码中，您可以像这样使用它：

$logfile    = 'C:\Program Files\Test Folder\TCP.Log'   # this is your current log file
$maxLogSize = 80MB                                     # the maximum size in bytes you want

# check if the log file exists
if (Test-Path -Path $logfile -PathType Leaf) {
    # check if the logfile is at its maximum size
    if ((Get-Item -Path $logfile).Length -ge $maxLogSize) {
        # rename the current log file using the next sequence number
        Rename-Unique -Path $logfile -Verbose
        # do we need to create the new log file?
        # New-Item -Path $logfile -ItemType 'File' -Force | Out-Null
    }
}

Answer 2

Ditto同意Lee_Daily所说的。

关于您的代码。您实际上并没有做任何事情来获得增量，因此，它将为您提供相同的数字，因此会出错。

只需获取文件名的计数，然后将计数加1即可重命名。如果您说基本文件名始终相同，那么您甚至根本不需要该循环文件。

示例：

# Check for similarly named files
Get-ChildItem -Path 'E:\temp\Reports\TCP*'

# Results

    Directory: E:\temp\Reports


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----       12/29/2018   1:10 PM             38 TCP.log
-a----       12/29/2018   1:10 PM             38 TCP1.log
-a----        3/14/2019  12:27 PM             45 TCP2.log
-a----       12/29/2018   2:31 PM             34 TCP3.log

# Rename the file that does not have a number with the next highest number of the count of the similarly named file.
Rename-Item -Path E:\Temp\Reports\TCP.log -NewName "TCP$((Get-ChildItem -Path E:\temp\Reports\tcp*).Count).log" -WhatIf

# Results

What if: Performing the operation "Rename File" on target "Item: E:\Temp\Reports\TCP.log Destination: E:\Temp\Reports\TCP4.log".

如果大于80MB，则重命名远程计算机上的日志文件

2 个答案: