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Date: Tue, 21 Feb 2012 00:51:57 -0400
From: Danilo Almeida <sengflex@gmail.com>
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Subject: re: advanced programming unix environment (pracct.c:31: error:
 storage size of 'acdata' isn't known)
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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'pracct.c' is outdated.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. :-)