Find out location of an executable file in Cocoa

Question

The simple question is: how to find out the location of an executable file in a Cocoa application.

Remember that, in many Unix-like OS people use PATH environment t

Answer 1

Related to Brian Webster's answer:

An easier way to get the User's shell is to use the NSProcessInfo class. e.g

NSDictionary *environmentDict = [[NSProcessInfo processInfo] environment];
NSString *shellString = [environmentDict objectForKey:@"SHELL"];

Which is easier than using dscl and parsing XML input.