acct.4 (2010 09)

acct(4) acct(4)

executed by the process.

Kernel internal structures may change from release to release without warning. Applications directly

relying on these structures are not supported.

Accounting ﬁles are currently written in 32-bit format. Thus, 64-bit applications which read the ﬁles

need to make special provisions. In particular, the

acct.h header declares the ac_btime ﬁeld as

int32_t rather than a time_t in 64-bit compilations. The

ac_btime ﬁeld should be cast to

time_t in the application before using it (e.g., in calls to date conversion functions). The accounting ﬁle

format will be changed to a 64-bit layout at a future release.