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What is considered best practice when referring to a program’s name? I’ve seen:
#define PROGRAM_NAME "myprog"
printf("this is %s\n", PROGRAM_NAME);
as well as:
printf("this is %s\n", argv[0]);
I know, that the second approach will give me ./myprog rather than myprog when the program is not called from $PATH and that the first approach will guarantee consistence regarding the program’s name.
But is there anything else, that makes one approach superior to the other?
The second approach is superior when you have multiple links. In *nix systems, sometimes behavior depends on how you call a program. So hard coding the program name would clearly be a problem — it could never check that.