arrays – perl打开文件,文件名中包含变量

我尝试打开文件夹中的文件列表.最后我想在其中插入一个 HTML-Snippet.到目前为止,我可以打开文件夹并读取数组中的列表.没关系.但是当我尝试使用变量作为文件名打开文件时,我每次都会收到一条错误消息(“权限被拒绝”).无论我使用$_还是将列表项的值放在变量中的其他变体.我在这里找到了类似的问题,但到目前为止还没有找到解决方案.这是我的代码：

use strict;
use warnings;

my ($line);

opendir (FOLDER,"path/to/folder/./") or die "$!";
my @folderlist = readdir(FOLDER);
my @sorted_folderlist = sort @folderlist;
close(FOLDER);

foreach (@sorted_folderlist) {
  my $filename = $_;
  open (READ,">","path/to/folder/$filename") or die "$!";
  # do something
  close (READ);
}

这里有什么错误？我如何使用变量作为文件名打开文件？

Pjoern

这是我改变的代码,以回答1：

my $dh; 
opendir $dh,"dir/./" or die ... 
my @folderlist = grep { -f "dir/$_" } readdir $dh; 
close $dh; 
my @sorted_folderlist = sort @folderlist; 

foreach my $filename (@sorted_folderlist) { 
  open my $fh,"<","dir/$filename" or die ... 
  open my $writeto,"new/$filename" or die ... 
  print $writeto "$fh"; 
  close $fh; 
  close $writeto; 
}

use strict;
use warnings;

opendir my $dh,"dir" or die $!;
# read all files,not directories
my @folderlist = grep { -f "dir/$_" } readdir $dh;
close $dh;
my @sorted_folderlist = sort @folderlist;

foreach my $filename (@sorted_folderlist) {
    open my $fh,"dir/$filename" or die "Could not write to dir/$filename: $!";
    print $fh "foo...n";
    close $fh;
}