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perl批量改文件后缀

如题，perl批量改文件后缀，将已有的统一格式的文件后缀，修改为新的统一的文件后缀。

#!/bin/perl
use 5.010;print "Please input file suffix which U want to rename!\n";
chomp (my $suffix_old = <>); # 去除输入中的回车符
print "Please output file suffix which U want to rename!\n";
chomp (my $suffix_new = <>);foreach my $file(glob "*.$suffix_old") {my $new_file = $file;$new_file =~ s/\.$suffix_old/.$suffix_new/gm;if (-e $new_file) {warn "Cannot rename $file to $new_file: $new_file exists\n";} elsif (rename $file => $new_file) {} else {warn "rename $file to $new_file failed:$!";}
}