advanced programming unix environment (pracct.c:31: error: storage size of 'acdata' isn't known)

[Danilo Almeida]

I think I found the reason for the reported error. In the file 
'pracct.c' variable 'acdata' is declared as 'struct acct'. This 
structure must be in header 'acct.h', in sub-directory 
'/usr/include/sys'. But it is not. In that header there are two similar 
structures instead: 'struct acctv2' and 'struct acctv1'. Thus, 
'pracct.c' is outdated. The question is which of the two structures 
replaces the 'struct acct' above. Forgive for my English. I am using 
google translator. My native language is Portuguese. :-)