Querry on #ifdefs

Hi=20

Basically i have two questions.

1)What is the difference between utmp and wtmp.

2)The comments follow with '-' symbol

In the file wu-ftpd/src/logutmp.c is there any
specific reason for #def's such as=20
- #if _HAVE_UT_TYPE - 0 (Any reason for - 0)
- #if _HAVE_UT_PID - 0 ... etc.=20

3)Does the code depend on any particular version of
glibc. I mean to say that if glibc version is upgraded
does it affect utmp/wtmp files in particular.

Thanks for your answers,

Vijay.



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