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ACCT(5)                  DragonFly File Formats Manual                 ACCT(5)


acct -- execution accounting file


#include <sys/types.h> #include <sys/acct.h>


The kernel maintains the following acct information structure for all processes. If a process terminates, and accounting is enabled, the ker- nel calls the acct(2) function call to prepare and append the record to the accounting file. /* * Accounting structures; these use a comp_t type which is a 3 bits base 8 * exponent, 13 bit fraction ``floating point'' number. Units are 1/AHZ * seconds. */ typedef u_short comp_t; #define AC_COMM_LEN 16 struct acct { char ac_comm[AC_COMM_LEN]; /* command name */ comp_t ac_utime; /* user time */ comp_t ac_stime; /* system time */ comp_t ac_etime; /* elapsed time */ time_t ac_btime; /* starting time */ uid_t ac_uid; /* user id */ gid_t ac_gid; /* group id */ short ac_mem; /* average memory usage */ comp_t ac_io; /* count of IO blocks */ dev_t ac_tty; /* controlling tty */ #define AFORK 0x01 /* forked but not exec'ed */ #define ASU 0x02 /* used super-user permissions */ #define ACOMPAT 0x04 /* used compatibility mode */ #define ACORE 0x08 /* dumped core */ #define AXSIG 0x10 /* killed by a signal */ char ac_flag; /* accounting flags */ }; /* * 1/AHZ is the granularity of the data encoded in the comp_t fields. * This is not necessarily equal to hz. */ #define AHZ 64 If a terminated process was created by an execve(2), the name of the exe- cuted file (at most ten characters of it) is saved in the field ac_comm and its status is saved by setting one of more of the following flags in ac_flag: AFORK, ASU, ACOMPAT, ACORE and AXSIG.


acct(2), execve(2), sa(8)


A acct file format appeared in Version 7 AT&T UNIX. DragonFly 3.5 June 5, 1993 DragonFly 3.5

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