strdup(NULL) supposed to create SIGSEGV?

[Simun Mikecin]

>Yes, it's supposed to segfault. Check out what, say, strcpy does if
>you ask it to copy a NULL pointer. And this is an improvement from the
>bad old days, when they would happily walk through memory starting at
>0.....
>Besides, errno is used to signal errors from system calls. strdup
>isn't a system call, it's a library function (says so at the top of
>the man page).
>Do you have examples of systems where strdup doesn't behave this way?

According to Open Group strdup should return NULL and set errno. Look at:
http://www.opengroup.org/onlinepubs/009695399/functions/strdup.html

There is no valid argument for doing segfault instead of above behavior.



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