--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * BSD Process Accounting for Linux - Definitions
+ *
+ * Author: Marco van Wieringen (mvw@planets.elm.net)
+ *
+ * This header file contains the definitions needed to implement
+ * BSD-style process accounting. The kernel accounting code and all
+ * user-level programs that try to do something useful with the
+ * process accounting log must include this file.
+ *
+ * Copyright (C) 1995 - 1997 Marco van Wieringen - ELM Consultancy B.V.
+ *
+ */
+
+#ifndef _LINUX_ACCT_H
+#define _LINUX_ACCT_H
+
+#include <linux/types.h>
+
+#include <asm/param.h>
+#include <asm/byteorder.h>
+
+/*
+ * comp_t is a 16-bit "floating" point number with a 3-bit base 8
+ * exponent and a 13-bit fraction.
+ * comp2_t is 24-bit with 5-bit base 2 exponent and 20 bit fraction
+ * (leading 1 not stored).
+ * See linux/kernel/acct.c for the specific encoding systems used.
+ */
+
+typedef __u16 comp_t;
+typedef __u32 comp2_t;
+
+/*
+ * accounting file record
+ *
+ * This structure contains all of the information written out to the
+ * process accounting file whenever a process exits.
+ */
+
+#define ACCT_COMM 16
+
+struct acct
+{
+ char ac_flag; /* Flags */
+ char ac_version; /* Always set to ACCT_VERSION */
+ /* for binary compatibility back until 2.0 */
+ __u16 ac_uid16; /* LSB of Real User ID */
+ __u16 ac_gid16; /* LSB of Real Group ID */
+ __u16 ac_tty; /* Control Terminal */
+ __u32 ac_btime; /* Process Creation Time */
+ comp_t ac_utime; /* User Time */
+ comp_t ac_stime; /* System Time */
+ comp_t ac_etime; /* Elapsed Time */
+ comp_t ac_mem; /* Average Memory Usage */
+ comp_t ac_io; /* Chars Transferred */
+ comp_t ac_rw; /* Blocks Read or Written */
+ comp_t ac_minflt; /* Minor Pagefaults */
+ comp_t ac_majflt; /* Major Pagefaults */
+ comp_t ac_swaps; /* Number of Swaps */
+/* m68k had no padding here. */
+ __u16 ac_ahz; /* AHZ */
+ __u32 ac_exitcode; /* Exitcode */
+ char ac_comm[ACCT_COMM + 1]; /* Command Name */
+ __u8 ac_etime_hi; /* Elapsed Time MSB */
+ __u16 ac_etime_lo; /* Elapsed Time LSB */
+ __u32 ac_uid; /* Real User ID */
+ __u32 ac_gid; /* Real Group ID */
+};
+
+struct acct_v3
+{
+ char ac_flag; /* Flags */
+ char ac_version; /* Always set to ACCT_VERSION */
+ __u16 ac_tty; /* Control Terminal */
+ __u32 ac_exitcode; /* Exitcode */
+ __u32 ac_uid; /* Real User ID */
+ __u32 ac_gid; /* Real Group ID */
+ __u32 ac_pid; /* Process ID */
+ __u32 ac_ppid; /* Parent Process ID */
+ __u32 ac_btime; /* Process Creation Time */
+ float ac_etime; /* Elapsed Time */
+ comp_t ac_utime; /* User Time */
+ comp_t ac_stime; /* System Time */
+ comp_t ac_mem; /* Average Memory Usage */
+ comp_t ac_io; /* Chars Transferred */
+ comp_t ac_rw; /* Blocks Read or Written */
+ comp_t ac_minflt; /* Minor Pagefaults */
+ comp_t ac_majflt; /* Major Pagefaults */
+ comp_t ac_swaps; /* Number of Swaps */
+ char ac_comm[ACCT_COMM]; /* Command Name */
+};
+
+/*
+ * accounting flags
+ */
+ /* bit set when the process ... */
+#define AFORK 0x01 /* ... executed fork, but did not exec */
+#define ASU 0x02 /* ... used super-user privileges */
+#define ACOMPAT 0x04 /* ... used compatibility mode (VAX only not used) */
+#define ACORE 0x08 /* ... dumped core */
+#define AXSIG 0x10 /* ... was killed by a signal */
+
+#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
+#define ACCT_BYTEORDER 0x80 /* accounting file is big endian */
+#elif defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
+#define ACCT_BYTEORDER 0x00 /* accounting file is little endian */
+#else
+#error unspecified endianness
+#endif
+
+#define ACCT_VERSION 2
+#define AHZ (HZ)
+
+
+#endif /* _LINUX_ACCT_H */
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