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Diffstat (limited to 'man5/acct.5')
| -rw-r--r-- | man5/acct.5 | 161 |
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diff --git a/man5/acct.5 b/man5/acct.5 deleted file mode 100644 index a140bc4..0000000 --- a/man5/acct.5 +++ /dev/null @@ -1,161 +0,0 @@ -.\" Copyright (C) 2008, Michael Kerrisk <mtk.manpages@gmail.com> -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.TH acct 5 2023-10-31 "Linux man-pages 6.7" -.SH NAME -acct \- process accounting file -.SH SYNOPSIS -.nf -.B #include <sys/acct.h> -.fi -.SH DESCRIPTION -If the kernel is built with the process accounting option enabled -.RB ( CONFIG_BSD_PROCESS_ACCT ), -then calling -.BR acct (2) -starts process accounting, for example: -.P -.in +4n -acct("/var/log/pacct"); -.in -.P -When process accounting is enabled, the kernel writes a record -to the accounting file as each process on the system terminates. -This record contains information about the terminated process, -and is defined in -.I <sys/acct.h> -as follows: -.P -.in +4n -.EX -#define ACCT_COMM 16 -\& -typedef u_int16_t comp_t; -\& -struct acct { - char ac_flag; /* Accounting flags */ - u_int16_t ac_uid; /* Accounting user ID */ - u_int16_t ac_gid; /* Accounting group ID */ - u_int16_t ac_tty; /* Controlling terminal */ - u_int32_t ac_btime; /* Process creation time - (seconds since the Epoch) */ - comp_t ac_utime; /* User CPU time */ - comp_t ac_stime; /* System CPU time */ - comp_t ac_etime; /* Elapsed time */ - comp_t ac_mem; /* Average memory usage (kB) */ - comp_t ac_io; /* Characters transferred (unused) */ - comp_t ac_rw; /* Blocks read or written (unused) */ - comp_t ac_minflt; /* Minor page faults */ - comp_t ac_majflt; /* Major page faults */ - comp_t ac_swaps; /* Number of swaps (unused) */ - u_int32_t ac_exitcode; /* Process termination status - (see wait(2)) */ - char ac_comm[ACCT_COMM+1]; - /* Command name (basename of last - executed command; null\-terminated) */ - char ac_pad[\fIX\fP]; /* padding bytes */ -}; -\& -enum { /* Bits that may be set in ac_flag field */ - AFORK = 0x01, /* Has executed fork, but no exec */ - ASU = 0x02, /* Used superuser privileges */ - ACORE = 0x08, /* Dumped core */ - AXSIG = 0x10 /* Killed by a signal */ -}; -.EE -.in -.P -The -.I comp_t -data type is a floating-point value consisting of a 3-bit, base-8 exponent, -and a 13-bit mantissa. -A value, -.IR c , -of this type can be converted to a (long) integer as follows: -.P -.nf - v = (c & 0x1fff) << (((c >> 13) & 0x7) * 3); -.fi -.P -The -.IR ac_utime , -.IR ac_stime , -and -.I ac_etime -fields measure time in "clock ticks"; divide these values by -.I sysconf(_SC_CLK_TCK) -to convert them to seconds. -.SS Version 3 accounting file format -Since Linux 2.6.8, -an optional alternative version of the accounting file can be produced -if the -.B CONFIG_BSD_PROCESS_ACCT_V3 -option is set when building the kernel. -With this option is set, -the records written to the accounting file contain additional fields, -and the width of -.I c_uid -and -.I ac_gid -fields is widened from 16 to 32 bits -(in line with the increased size of UID and GIDs in Linux 2.4 and later). -The records are defined as follows: -.P -.in +4n -.EX -struct acct_v3 { - char ac_flag; /* Flags */ - char ac_version; /* Always set to ACCT_VERSION (3) */ - u_int16_t ac_tty; /* Controlling terminal */ - u_int32_t ac_exitcode; /* Process termination status */ - u_int32_t ac_uid; /* Real user ID */ - u_int32_t ac_gid; /* Real group ID */ - u_int32_t ac_pid; /* Process ID */ - u_int32_t ac_ppid; /* Parent process ID */ - u_int32_t ac_btime; /* Process creation time */ - float ac_etime; /* Elapsed time */ - comp_t ac_utime; /* User CPU time */ - comp_t ac_stime; /* System time */ - comp_t ac_mem; /* Average memory usage (kB) */ - comp_t ac_io; /* Characters transferred (unused) */ - comp_t ac_rw; /* Blocks read or written - (unused) */ - comp_t ac_minflt; /* Minor page faults */ - comp_t ac_majflt; /* Major page faults */ - comp_t ac_swaps; /* Number of swaps (unused) */ - char ac_comm[ACCT_COMM]; /* Command name */ -}; -.EE -.in -.SH VERSIONS -Although it is present on most systems, it is not standardized, -and the details vary somewhat between systems. -.SH STANDARDS -None. -.SH HISTORY -glibc 2.6. -.P -Process accounting originated on BSD. -.SH NOTES -Records in the accounting file are ordered by termination time of -the process. -.P -Up to and including Linux 2.6.9, -a separate accounting record is written for each thread created using -the NPTL threading library; -since Linux 2.6.10, -a single accounting record is written for the entire process -on termination of the last thread in the process. -.P -The -.I /proc/sys/kernel/acct -file, described in -.BR proc (5), -defines settings that control the behavior of process accounting -when disk space runs low. -.SH SEE ALSO -.BR lastcomm (1), -.BR acct (2), -.BR accton (8), -.BR sa (8) |