如何将信号名称（字符串）转换为信号代码？

I am writing a program that reads the name of the signal (e.g. SIGSTOP, SIGKILL etc) as a string from the command line and calls the kill() system call to send the signal. I was wondering if there is a simple way to convert the string to signal codes (in signal.h). I am writing a program that reads the name of t