我试图创建一个基于web的界面,允许用户在后台运行特定的bash脚本,获取其内容并删除已用于存储输出的临时文件。到目前为止,我有这个:
<form method="POST">
<button type="submit" name="scan" class="btn btn-default">Run script</button>
</form>
<?php
if (isset($_POST['scan'])) {
$tmpfname = tempnam("/tmp", "SS-");
shell_exec('script.sh > '. $tmpfname .' &');
}
?>
<form method="POST">
<button type="submit" name="check-and-delete" class="btn btn-default">Check if script is running and delete the temporary file</button>
</form>
<?php
if (isset($_POST['check-and-delete'])) {
if (shell_exec("pgrep <its process>") != '') {
echo 'Script is running';
} else {
echo 'Script is NOT running';
echo '<pre>'. file_get_contents($tmpfname) .'</pre>';
unlink($tmpfname);
}
}
然而,虽然一切似乎按计划进行,但最终,$tmpfname
似乎是空的,导致无法检索其内容并删除它。
内容如下:
- 用户单击
Run script
。-
1.1.
创建tmp文件; -
1.2.
脚本运行,输出重定向到tmp文件;
-
- 用户单击
Check if script is running and delete the temporary file
。-
2.1.
检查脚本是否仍在运行。如果脚本仍在运行,则除了回显之外什么也不做; -
2.2.
如果脚本没有运行(已经完成),应该获取tmp文件的内容并删除该文件;
-
在2.2
遇到这个问题。如何永久存储临时文件的名称/完整路径?
这应该澄清了我所说的:在会话中存储$tmpfname
的意思。我不保证这段代码会正常工作,可能会有其他错误。
// always start sessions
session_start();
<form method="POST">
<button type="submit" name="scan" class="btn btn-default">Run script</button>
</form>
<?php
if (isset($_POST['scan'])) {
$tmpfname = tempnam(sys_get_temp_dir(), "SS-");
shell_exec('script.sh > '. $tmpfname .' &');
// store in session
$_SESSION['tmpfname'] = $tmpfname;
}
?>
<form method="POST">
<button type="submit" name="check-and-delete" class="btn btn-default">Check if script is running and delete the temporary file</button>
</form>
<?php
if (isset($_POST['check-and-delete'])) {
if (shell_exec("pgrep <its process>") != '') {
echo 'Script is running';
} else {
echo 'Script is NOT running';
// retrieve from session
$tmpfname = $_SESSION['tmpfname'];
echo '<pre>'. file_get_contents($tmpfname) .'</pre>';
unlink($tmpfname);
}
}