Checking a string for a certain character

Is there any sort of function or linux command that would check a string for a certain character? For example:

Would check the buffer 'buf' for "death". Does Smaug or linux have anything like that? If not, how would I got about doing that? Basically, I want to check a pcdata string for if it has the characters name in it.

You can use the strstr function, like such
It returns true if the second argument is found in the first.

Thanks, although it is case sensitive. Should I follow how Smaug did str_cmp? (Where was that defined?)

[EDIT] str_str seems to already exist in grub.c

Look into strcasestr.