v7 man page for acct

ACCT(2) 							System Calls Manual							   ACCT(2)

NAME
       acct - turn accounting on or off

SYNOPSIS
       acct(file)
       char *file;

DESCRIPTION
       The system is prepared to write a record in an accounting file for each process as it terminates.  This call, with a null-terminated string
       naming an existing file as argument, turns on accounting; records for each terminating process are appended to  file.   An  argument  of  0
       causes accounting to be turned off.

       The accounting file format is given in acct(5).

SEE ALSO
       acct(5), sa(1)

DIAGNOSTICS
       On  error  -1  is  returned.   The file must exist and the call may be exercised only by the super-user.  It is erroneous to try to turn on
       accounting when it is already on.

BUGS
       No accounting is produced for programs running when a crash occurs.  In particular nonterminating programs are never accounted for.

ASSEMBLER
       (acct = 51.)
       sys acct; file

																	   ACCT(2)