1.\" 2.\" Copyright (c) 2016 John Baldwin <jhb@FreeBSD.org> 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd January 16, 2018 28.Dt sysdecode_mask 3 29.Os 30.Sh NAME 31.Nm sysdecode_mask , 32.Nm sysdecode_accessmode , 33.Nm sysdecode_atflags , 34.Nm sysdecode_capfcntlrights , 35.Nm sysdecode_fcntl_fileflags , 36.Nm sysdecode_fileflags , 37.Nm sysdecode_filemode , 38.Nm sysdecode_flock_operation , 39.Nm sysdecode_mlockall_flags , 40.Nm sysdecode_mmap_flags , 41.Nm sysdecode_mmap_prot , 42.Nm sysdecode_mount_flags , 43.Nm sysdecode_msg_flags , 44.Nm sysdecode_msync_flags , 45.Nm sysdecode_open_flags , 46.Nm sysdecode_pipe2_flags , 47.Nm sysdecode_reboot_howto , 48.Nm sysdecode_rfork_flags , 49.Nm sysdecode_semget_flags , 50.Nm sysdecode_sendfile_flags , 51.Nm sysdecode_shmat_flags , 52.Nm sysdecode_sctp_nxt_flags , 53.Nm sysdecode_sctp_rcv_flags , 54.Nm sysdecode_sctp_snd_flags , 55.Nm sysdecode_socket_type , 56.Nm sysdecode_thr_create_flags , 57.Nm sysdecode_umtx_cvwait_flags , 58.Nm sysdecode_umtx_rwlock_flags , 59.Nm sysdecode_vmprot , 60.Nm sysdecode_wait4_options , 61.Nm sysdecode_wait6_options 62.Nd print name of various bitmask values 63.Sh LIBRARY 64.Lb libsysdecode 65.Sh SYNOPSIS 66.In sys/types.h 67.In stdbool.h 68.In stdio.h 69.In sysdecode.h 70.Ft bool 71.Fn sysdecode_access_mode "FILE *fp" "int mode" "int *rem" 72.Ft bool 73.Fn sysdecode_atflags "FILE *fp" "int flags" "int *rem" 74.Ft bool 75.Fn sysdecode_cap_fcntlrights "FILE *fp" "uint32_t rights" "uint32_t *rem" 76.Ft bool 77.Fn sysdecode_fcntl_fileflags "FILE *fp" "int flags" "int *rem" 78.Ft bool 79.Fn sysdecode_fileflags "FILE *fp" "fflags_t flags" "fflags_t *rem" 80.Ft bool 81.Fn sysdecode_filemode "FILE *fp" "int mode" "int *rem" 82.Ft bool 83.Fn sysdecode_flock_operation "FILE *fp" "int operation" "int *rem" 84.Ft bool 85.Fn sysdecode_mlockall_flags "FILE *fp" "int flags" "int *rem" 86.Ft bool 87.Fn sysdecode_mmap_flags "FILE *fp" "int flags" "int *rem" 88.Ft bool 89.Fn sysdecode_mmap_prot "FILE *fp" "int prot" "int *rem" 90.Ft bool 91.Fn sysdecode_mount_flags "FILE *fp" "int flags" "int *rem" 92.Ft bool 93.Fn sysdecode_msg_flags "FILE *fp" "int flags" "int *rem" 94.Ft bool 95.Fn sysdecode_msync_flags "FILE *fp" "int flags" "int *rem" 96.Ft bool 97.Fn sysdecode_open_flags "FILE *fp" "int flags" "int *rem" 98.Ft bool 99.Fn sysdecode_pipe2_flags "FILE *fp" "int flags" "int *rem" 100.Ft bool 101.Fn sysdecode_reboot_howto "FILE *fp" "int howto" "int *rem" 102.Ft bool 103.Fn sysdecode_rfork_flags "FILE *fp" "int flags" "int *rem" 104.Ft bool 105.Fn sysdecode_sctp_nxt_flags "FILE *fp" "int flags" "int *rem" 106.Ft bool 107.Fn sysdecode_sctp_rcv_flags "FILE *fp" "int flags" "int *rem" 108.Ft bool 109.Fn sysdecode_sctp_snd_flags "FILE *fp" "int flags" "int *rem" 110.Ft bool 111.Fn sysdecode_semget_flags "FILE *fp" "int flags" "int *rem" 112.Ft bool 113.Fn sysdecode_sendfile_flags "FILE *fp" "int flags" "int *rem" 114.Ft bool 115.Fn sysdecode_shmat_flags "FILE *fp" "int flags" "int *rem" 116.Ft bool 117.Fn sysdecode_socket_type "FILE *fp" "int type" "int *rem" 118.Ft bool 119.Fn sysdecode_thr_create_flags "FILE *fp" "int flags" "int *rem" 120.Ft bool 121.Fn sysdecode_umtx_cvwait_flags "FILE *fp" "u_long flags" "u_long *rem" 122.Ft bool 123.Fn sysdecode_umtx_rwlock_flags "FILE *fp" "u_long flags" "u_long *rem" 124.Ft bool 125.Fn sysdecode_vmprot "FILE *fp" "int type" "int *rem" 126.Ft bool 127.Fn sysdecode_wait4_options "FILE *fp" "int options" "int *rem" 128.Ft bool 129.Fn sysdecode_wait6_options "FILE *fp" "int options" "int *rem" 130.Sh DESCRIPTION 131The 132.Nm 133functions are used to generate a text description of an integer value 134built from a mask of bitfields. 135The text description lists the C macros for field values joined by pipe 136.Sq | 137characters matching the format used in C source code. 138Most of the values decoded by these functions are passed as arguments to 139system calls, 140though some of these values are used internally in the kernel. 141.Pp 142Each function writes the text description to 143.Fa fp . 144The second argument should contain the integer value to be decoded. 145The 146.Fa rem 147argument is set to the value of any bits that were not decoded 148.Pq bit fields that do not have a corresponding C macro . 149.Fa rem 150may be set to 151.Dv NULL 152if the caller does not need this value. 153Each function returns 154.Dv true 155if any bit fields in the value were decoded and 156.Dv false 157if no bit fields were decoded. 158.Pp 159Most of these functions decode an argument passed to a system call: 160.Bl -column "Fn sysdecode_flock_operation" "Xr cap_fcntls_limit 2" 161.It Sy Function Ta Sy System Call Ta Sy Argument 162.It Fn sysdecode_access_mode Ta Xr access 2 Ta Fa mode 163.It Fn sysdecode_atflags Ta Xr chflagsat 2 , Xr fstatat 2 Ta Fa atflag , Fa flag 164.It Fn sysdecode_cap_fcntlrights Ta Xr cap_fcntls_limit 2 Ta Fa fcntlrights 165.It Fn sysdecode_fileflags Ta Xr chflags 2 Ta Fa flags 166.It Fn sysdecode_filemode Ta Xr chmod 2 , Xr open 2 Ta mode 167.It Fn sysdecode_flock_operation Ta Xr flock 2 Ta Fa operation 168.It Fn sysdecode_mlockall_flags Ta Xr mlockall 2 Ta Fa flags 169.It Fn sysdecode_mmap_flags Ta Xr mmap 2 Ta Fa flags 170.It Fn sysdecode_mmap_prot Ta Xr mmap 2 Ta Fa prot 171.It Fn sysdecode_mount_flags Ta Xr mount 2 Ta Fa flags 172.It Fn sysdecode_msg_flags Ta Xr recv 2 , Xr send 2 Ta Fa flags 173.It Fn sysdecode_msync_flags Ta Xr msync 2 Ta Fa flags 174.It Fn sysdecode_open_flags Ta Xr open 2 Ta Fa flags 175.It Fn sysdecode_pipe2_flags Ta Xr pipe2 Ta Fa flags 176.It Fn sysdecode_reboot_howto Ta Xr reboot 2 Ta Fa howto 177.It Fn sysdecode_rfork_flags Ta Xr rfork 2 Ta Fa flags 178.It Fn sysdecode_semget_flags Ta Xr semget 2 Ta Fa flags 179.It Fn sysdecode_sendfile_flags Ta Xr sendfile 2 Ta Fa flags 180.It Fn sysdecode_shmat_flags Ta Xr shmat 2 Ta Fa flags 181.It Fn sysdecode_socket_type Ta Xr socket 2 Ta Fa type 182.It Fn sysdecode_thr_create_flags Ta Xr thr_create 2 Ta Fa flags 183.It Fn sysdecode_wait4_options Ta Xr wait4 2 Ta Fa options 184.It Fn sysdecode_wait6_options Ta Xr wait6 2 Ta Fa options 185.El 186.Pp 187Other functions decode the values described below: 188.Bl -tag -width ".Fn sysdecode_umtx_cvwait_flags" 189.It Fn sysdecode_fcntl_fileflags 190The file flags used with the 191.Dv F_GETFL 192and 193.Dv F_SETFL 194.Xr fcntl 2 195commands. 196.It Fn sysdecode_sctp_nxt_flags 197The 198.Fa nxt_flags 199member of a 200.Vt struct sctp_nxtinfo . 201.It Fn sysdecode_sctp_rcv_flags 202The 203.Fa rcv_flags 204member of a 205.Vt struct sctp_rcvinfo . 206.It Fn sysdecode_sctp_snd_flags 207The 208.Fa snd_flags 209member of a 210.Vt struct sctp_sndinfo . 211.It Fn sysdecode_umtx_cvwait_flags 212The 213.Fa val 214argument to 215.Xr _umtx_op 2 216for 217.Dv UMTX_OP_CV_WAIT 218operations. 219.It Fn sysdecode_umtx_rwlock_flags 220The 221.Fa val 222argument to 223.Xr _umtx_op 2 224for 225.Dv UMTX_OP_RW_RDLOCK 226operations. 227.It Fn sysdecode_vmprot 228The memory protection flags stored in 229.Vt vm_prot_t 230variables. 231.El 232.Sh RETURN VALUES 233The 234.Nm 235functions return 236.Dv true 237if any bit fields in the value were decoded and 238.Dv false 239if no bit fields were decoded. 240.Sh SEE ALSO 241.Xr sysdecode 3 , 242.Xr sysdecode_enum 3 243