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06-16-2005
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utmp ACCOUNTING
the utmp.h ACCOUNTING macro is set to 9 on my system.
my question is: what "accounting" is it referring to? 
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06-16-2005
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Not sure I understand the question, but accounting is software that records who is using what resources. In the 70's and 80's, a company might have one computer and it was expensive. Accounting was used to distribute the costs to the departments that used it.
See these man pages: acct acctsh acctprc acctcom
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06-17-2005
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The utmp struct (record for utmp) has a field, ut_type. This indicates the kind of information a contains. ut_type can be 10 different values 0 - 9.
The defines in utmp.h simply let you use a meaningful word instead of a not-so-meaningful number to find out what type of utmp record you have read. Code:
#define EMPTY 0 /* null record */ #define RUN_LVL 1 #define BOOT_TIME 2 /* part of boot */ #define OLD_TIME 3 #define NEW_TIME 4 #define INIT_PROCESS 5 /* Process spawned by "init" */ #define LOGIN_PROCESS 6 /* A "getty" process waiting for login */ #define USER_PROCESS 7 /* A user process */ #define DEAD_PROCESS 8 #define ACCOUNTING 9 /* an accounting record */ #define UTMAXTYPE ACCOUNTING /* Largest legal value of ut_type */
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