3d265fce43
- skipping paragraph macro: Pp after Sh - sections out of conventional order: Sh EXAMPLES - whitespace at end of input line - normalizing date format
243 lines
7.8 KiB
Groff
243 lines
7.8 KiB
Groff
.\"
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.\" Copyright (c) 2016 John Baldwin <jhb@FreeBSD.org>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 16, 2018
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.Dt sysdecode_mask 3
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.Os
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.Sh NAME
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.Nm sysdecode_mask ,
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.Nm sysdecode_accessmode ,
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.Nm sysdecode_atflags ,
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.Nm sysdecode_capfcntlrights ,
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.Nm sysdecode_fcntl_fileflags ,
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.Nm sysdecode_fileflags ,
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.Nm sysdecode_filemode ,
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.Nm sysdecode_flock_operation ,
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.Nm sysdecode_mlockall_flags ,
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.Nm sysdecode_mmap_flags ,
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.Nm sysdecode_mmap_prot ,
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.Nm sysdecode_mount_flags ,
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.Nm sysdecode_msg_flags ,
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.Nm sysdecode_msync_flags ,
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.Nm sysdecode_open_flags ,
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.Nm sysdecode_pipe2_flags ,
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.Nm sysdecode_reboot_howto ,
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.Nm sysdecode_rfork_flags ,
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.Nm sysdecode_semget_flags ,
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.Nm sysdecode_sendfile_flags ,
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.Nm sysdecode_shmat_flags ,
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.Nm sysdecode_sctp_nxt_flags ,
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.Nm sysdecode_sctp_rcv_flags ,
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.Nm sysdecode_sctp_snd_flags ,
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.Nm sysdecode_socket_type ,
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.Nm sysdecode_thr_create_flags ,
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.Nm sysdecode_umtx_cvwait_flags ,
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.Nm sysdecode_umtx_rwlock_flags ,
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.Nm sysdecode_vmprot ,
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.Nm sysdecode_wait4_options ,
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.Nm sysdecode_wait6_options
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.Nd print name of various bitmask values
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.Sh LIBRARY
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.Lb libsysdecode
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.Sh SYNOPSIS
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.In sys/types.h
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.In stdbool.h
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.In stdio.h
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.In sysdecode.h
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.Ft bool
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.Fn sysdecode_access_mode "FILE *fp" "int mode" "int *rem"
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.Ft bool
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.Fn sysdecode_atflags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_cap_fcntlrights "FILE *fp" "uint32_t rights" "uint32_t *rem"
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.Ft bool
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.Fn sysdecode_fcntl_fileflags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_fileflags "FILE *fp" "fflags_t flags" "fflags_t *rem"
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.Ft bool
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.Fn sysdecode_filemode "FILE *fp" "int mode" "int *rem"
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.Ft bool
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.Fn sysdecode_flock_operation "FILE *fp" "int operation" "int *rem"
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.Ft bool
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.Fn sysdecode_mlockall_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_mmap_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_mmap_prot "FILE *fp" "int prot" "int *rem"
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.Ft bool
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.Fn sysdecode_mount_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_msg_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_msync_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_open_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_pipe2_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_reboot_howto "FILE *fp" "int howto" "int *rem"
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.Ft bool
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.Fn sysdecode_rfork_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_sctp_nxt_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_sctp_rcv_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_sctp_snd_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_semget_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_sendfile_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_shmat_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_socket_type "FILE *fp" "int type" "int *rem"
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.Ft bool
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.Fn sysdecode_thr_create_flags "FILE *fp" "int flags" "int *rem"
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.Ft bool
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.Fn sysdecode_umtx_cvwait_flags "FILE *fp" "u_long flags" "u_long *rem"
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.Ft bool
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.Fn sysdecode_umtx_rwlock_flags "FILE *fp" "u_long flags" "u_long *rem"
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.Ft bool
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.Fn sysdecode_vmprot "FILE *fp" "int type" "int *rem"
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.Ft bool
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.Fn sysdecode_wait4_options "FILE *fp" "int options" "int *rem"
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.Ft bool
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.Fn sysdecode_wait6_options "FILE *fp" "int options" "int *rem"
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.Sh DESCRIPTION
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The
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.Nm
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functions are used to generate a text description of an integer value
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built from a mask of bitfields.
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The text description lists the C macros for field values joined by pipe
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.Sq |
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characters matching the format used in C source code.
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Most of the values decoded by these functions are passed as arguments to
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system calls,
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though some of these values are used internally in the kernel.
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.Pp
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Each function writes the text description to
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.Fa fp .
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The second argument should contain the integer value to be decoded.
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The
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.Fa rem
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argument is set to the value of any bits that were not decoded
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.Pq bit fields that do not have a corresponding C macro .
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.Fa rem
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may be set to
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.Dv NULL
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if the caller does not need this value.
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Each function returns
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.Dv true
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if any bit fields in the value were decoded and
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.Dv false
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if no bit fields were decoded.
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.Pp
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Most of these functions decode an argument passed to a system call:
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.Bl -column "Fn sysdecode_flock_operation" "Xr cap_fcntls_limit 2"
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.It Sy Function Ta Sy System Call Ta Sy Argument
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.It Fn sysdecode_access_mode Ta Xr access 2 Ta Fa mode
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.It Fn sysdecode_atflags Ta Xr chflagsat 2 , Xr fstatat 2 Ta Fa atflag , Fa flag
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.It Fn sysdecode_cap_fcntlrights Ta Xr cap_fcntls_limit 2 Ta Fa fcntlrights
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.It Fn sysdecode_fileflags Ta Xr chflags 2 Ta Fa flags
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.It Fn sysdecode_filemode Ta Xr chmod 2 , Xr open 2 Ta mode
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.It Fn sysdecode_flock_operation Ta Xr flock 2 Ta Fa operation
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.It Fn sysdecode_mlockall_flags Ta Xr mlockall 2 Ta Fa flags
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.It Fn sysdecode_mmap_flags Ta Xr mmap 2 Ta Fa flags
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.It Fn sysdecode_mmap_prot Ta Xr mmap 2 Ta Fa prot
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.It Fn sysdecode_mount_flags Ta Xr mount 2 Ta Fa flags
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.It Fn sysdecode_msg_flags Ta Xr recv 2 , Xr send 2 Ta Fa flags
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.It Fn sysdecode_msync_flags Ta Xr msync 2 Ta Fa flags
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.It Fn sysdecode_open_flags Ta Xr open 2 Ta Fa flags
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.It Fn sysdecode_pipe2_flags Ta Xr pipe2 Ta Fa flags
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.It Fn sysdecode_reboot_howto Ta Xr reboot 2 Ta Fa howto
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.It Fn sysdecode_rfork_flags Ta Xr rfork 2 Ta Fa flags
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.It Fn sysdecode_semget_flags Ta Xr semget 2 Ta Fa flags
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.It Fn sysdecode_sendfile_flags Ta Xr sendfile 2 Ta Fa flags
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.It Fn sysdecode_shmat_flags Ta Xr shmat 2 Ta Fa flags
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.It Fn sysdecode_socket_type Ta Xr socket 2 Ta Fa type
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.It Fn sysdecode_thr_create_flags Ta Xr thr_create 2 Ta Fa flags
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.It Fn sysdecode_wait4_options Ta Xr wait4 2 Ta Fa options
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.It Fn sysdecode_wait6_options Ta Xr wait6 2 Ta Fa options
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.El
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.Pp
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Other functions decode the values described below:
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.Bl -tag -width ".Fn sysdecode_umtx_cvwait_flags"
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.It Fn sysdecode_fcntl_fileflags
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The file flags used with the
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.Dv F_GETFL
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and
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.Dv F_SETFL
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.Xr fcntl 2
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commands.
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.It Fn sysdecode_sctp_nxt_flags
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The
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.Fa nxt_flags
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member of a
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.Vt struct sctp_nxtinfo .
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.It Fn sysdecode_sctp_rcv_flags
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The
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.Fa rcv_flags
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member of a
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.Vt struct sctp_rcvinfo .
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.It Fn sysdecode_sctp_snd_flags
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The
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.Fa snd_flags
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member of a
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.Vt struct sctp_sndinfo .
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.It Fn sysdecode_umtx_cvwait_flags
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The
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.Fa val
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argument to
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.Xr _umtx_op 2
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for
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.Dv UMTX_OP_CV_WAIT
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operations.
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.It Fn sysdecode_umtx_rwlock_flags
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The
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.Fa val
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argument to
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.Xr _umtx_op 2
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for
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.Dv UMTX_OP_RW_RDLOCK
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operations.
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.It Fn sysdecode_vmprot
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The memory protection flags stored in
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.Vt vm_prot_t
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variables.
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.El
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.Sh RETURN VALUES
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The
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.Nm
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functions return
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.Dv true
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if any bit fields in the value were decoded and
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.Dv false
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if no bit fields were decoded.
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.Sh SEE ALSO
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.Xr sysdecode 3 ,
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.Xr sysdecode_enum 3
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