Re: strcpy versus strncpy

[j-zbiciak1 () ti com (Joe Zbiciak)]

'Dean Gaudet' said previously:
|
| You forgot:
|
| 4. strncpy is required to zero-fill the entire destination, which can be
| quite a performance pig if the destination is big and the strncpy is
| executed frequently.

and

5. strncpy may not zero-terminate the resulting string, leading to other
   interesting problems if you don't ensure that the resulting string
   is zero terminated yourself.

(AT&T SVR4 had a lot of bugs in this vein regarding utmp, since their
utmp structure only allowed 8 characters for login names.  If you had
an 8 character login name, programs like "who" would show garbage after
the login name because they'd assume that ut_user[] was zero terminated
when it isn't necessarily.)

Regards,

--Joe

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