有问题的2个例子:以下语句语法有什么问题(perl newbie):
$mailCmd = sprintf("echo $message | /usr/ucb/mail -s 'X Detected an Invalid Thing' %s", $people_list);
当我执行system($mailCmd)
或`$mailCmd`
时,会产生:
sh: syntax error at line 2: `|' unexpected
另一个:
$message = "Invalid STUFF setup for ID $r. Please correct this ASAP.\n" .
"Number of thingies = $uno \n" .
"Another thingy = $id \n" ;
这会产生:
sh: Number: not found
sh: Another: not found
提前致谢
答案 0 :(得分:3)
第一个问题的直接原因是您正在执行以下命令,因为$message
的内容以换行符结尾。
echo ...
| /usr/usb/mail ...
这两个问题都是shell命令构造不当造成的。修正:
use String::ShellQuote qw( shell_quote );
my $echo_cmd = shell_quote('echo', $message);
my $mail_cmd = shell_quote('/usr/ucb/mail',
'-s' => 'X Detected an Invalid Thing',
$people_list,
);
system("$echo_cmd | $mail_cmd");
完全避免使用echo
和shell:
use IPC::Run3 qw( run3 );
my @cmd = ('/usr/ucb/mail',
'-s' => 'X Detected an Invalid Thing',
$people_list,
);
run3 \@cmd, \$message;