$cat test.pl    
open(FILE,"zcat dummy.gz |") or die "DIE";

$./test.pl    
zcat: dummy.gz: No such file or directory

如果我正常读取文件,它按预期工作：

$cat test2.pl    
open(FILE,"dummy.gz") or die "DIE";

$./test2.pl    
DIE at ./test.pl line 2.