Linux bash inline命令执行程序并限制资源
I made a website that needs to execute some kind of C++ program (the program has been compiled). But I want to limit the resources needed by the program. The resources that I want to limit are run time and used memory.
I think run time can be done with command to execute & sleep time; kill $!
But that command causes some delay if the process finishes before the sleep time.
I don't know how to limit run time (without delay) and used memory with an inline command. Is there any suggestion to do it?
Thx before... I really appreciate your help..
command ulimit is your friend
for example (ulimit -t 1; /your/program 2>/some/logfile) | head -c 100k
will do two things:
- limit the max CPU to one second
- limit the output to 100k
Check out the ulimit command. I've not used it but I think it will do what you want.
(ulimit -d 1000 -m 1000 -v 1000 -t 1; /your/program 2>/some/logfile) | head -c 100000
This will limit memory size as well as time. You can use ulimit -a to find out what these limits mean or read the bash man page and search for ulimit.