我有一个脚本在我的
linux服务器的后台运行,我想捕获像重启或任何会杀死这个脚本的信号,而是在实际退出之前保存任何importante信息.
我认为我需要捕获的大部分内容是SIGINT,SIGTERM,SIGHUP,SIGKILL.
如何捕获这些信号并使其执行退出功能,否则继续执行它正在执行的任何操作？
伪perl代码：
#!/usr/bin/perl
use stricts;
use warnings;
while (true)
{
#my happy code is running
#my happy code will sleep for a few until its breath is back to keep running.
}
#ops I have detected an evil force trying to kill me
#let's call the safe exit.
sub safe_exit()
{
# save stuff
exit(1);
}
<?PHP while (1) { #my happy code is running #my happy code will sleep for a few until its breath is back to keep running. } #ops I have detected an evil force trying to kill me #let's call the safe exit. function safe_exit() { # save stuff exit(1); } ?>
PHP使用
pcntl_signal来注册信号处理程序,所以像这样：
declare(ticks = 1);
function sig_handler($sig) {
switch($sig) {
case SIGINT:
# one branch for signal...
}
}
pcntl_signal(SIGINT,"sig_handler");
pcntl_signal(SIGTERM,"sig_handler");
pcntl_signal(SIGHUP,"sig_handler");
# Nothing for SIGKILL as it won't work and trying to will give you a warning.
