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				.\"
				.\" Copyright (c) 2016 John Baldwin <jhb@FreeBSD.org>
				.\" All rights reserved.
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				.\" $FreeBSD$
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				.Dd October 17, 2016
				.Dt sysdecode_enum 3
				.Os
				.Sh NAME
				.Nm sysdecode_enum ,
				.Nm sysdecode_acltype ,
				.Nm sysdecode_atfd ,
				.Nm sysdecode_extattrnamespace ,
				.Nm sysdecode_fadvice ,
				.Nm sysdecode_fcntl_cmd ,
				.Nm sysdecode_idtype ,
				.Nm sysdecode_ipproto ,
				.Nm sysdecode_kldsym_cmd ,
				.Nm sysdecode_kldunload_flags ,
				.Nm sysdecode_lio_listio_mode ,
				.Nm sysdecode_madvice ,
				.Nm sysdecode_minherit_flags ,
				.Nm sysdecode_msgctl_cmd ,
				.Nm sysdecode_nfssvc_flags ,
				.Nm sysdecode_prio_which ,
				.Nm sysdecode_procctl_cmd ,
				.Nm sysdecode_ptrace_request ,
				.Nm sysdecode_rlimit ,
				.Nm sysdecode_rtprio_function ,
				.Nm sysdecode_scheduler_policy ,
				.Nm sysdecode_semctl_cmd ,
				.Nm sysdecode_shmctl_cmd ,
				.Nm sysdecode_shutdown_how ,
				.Nm sysdecode_sigbus_code ,
				.Nm sysdecode_sigchld_code ,
				.Nm sysdecode_sigfpe_code ,
				.Nm sysdecode_sigill_code ,
				.Nm sysdecode_signal ,
				.Nm sysdecode_sigprocmask_how ,
				.Nm sysdecode_sigsegv_code ,
				.Nm sysdecode_sigtrap_code ,
				.Nm sysdecode_sockaddr_family ,
				.Nm sysdecode_socketdomain ,
				.Nm sysdecode_sockettype ,
				.Nm sysdecode_sockopt_level ,
				.Nm sysdecode_umtx_op ,
				.Nm sysdecode_vmresult ,
				.Nm sysdecode_whence
				.Nd lookup name of various enumerated values
				.Sh LIBRARY
				.Lb libsysdecode
				.Sh SYNOPSIS
				.In sys/types.h
				.In stdbool.h
				.In sysdecode.h
				.Ft const char *
				.Fn sysdecode_acltype "int type"
				.Ft const char *
				.Fn sysdecode_atfd "int fd"
				.Ft const char *
				.Fn sysdecode_extattrnamespace "int namespace"
				.Ft const char *
				.Fn sysdecode_fadvice "int advice"
				.Ft const char *
				.Fn sysdecode_fcntl_cmd "int cmd"
				.Ft const char *
				.Fn sysdecode_idtype "int idtype"
				.Ft const char *
				.Fn sysdecode_ipproto "int protocol"
				.Ft const char *
				.Fn sysdecode_kldsym_cmd "int cmd"
				.Ft const char *
				.Fn sysdecode_kldunload_flags "int flags"
				.Ft const char *
				.Fn sysdecode_lio_listio_mode "int mode"
				.Ft const char *
				.Fn sysdecode_madvice "int advice"
				.Ft const char *
				.Fn sysdecode_minherit_flags "int inherit"
				.Ft const char *
				.Fn sysdecode_msgctl_cmd "int cmd"
				.Ft const char *
				.Fn sysdecode_nfssvc_flags "int flags"
				.Ft const char *
				.Fn sysdecode_prio_which "int which"
				.Ft const char *
				.Fn sysdecode_procctl_cmd "int cmd"
				.Ft const char *
				.Fn sysdecode_ptrace_request "int request"
				.Ft const char *
				.Fn sysdecode_rlimit "int resource"
				.Ft const char *
				.Fn sysdecode_rtprio_function "int function"
				.Ft const char *
				.Fn sysdecode_scheduler_policy "int policy"
				.Ft const char *
				.Fn sysdecode_semctl_cmd "int cmd"
				.Ft const char *
				.Fn sysdecode_shmctl_cmd "int cmd"
				.Ft const char *
				.Fn sysdecode_shutdown_how "int how"
				.Ft const char *
				.Fn sysdecode_sigbus_code "int si_code"
				.Ft const char *
				.Fn sysdecode_sigchld_code "int si_code"
				.Ft const char *
				.Fn sysdecode_sigfpe_code "int si_code"
				.Ft const char *
				.Fn sysdecode_sigill_code "int si_code"
				.Ft const char *
				.Fn sysdecode_signal "int sig"
				.Ft const char *
				.Fn sysdecode_sigprocmask_how "int how"
				.Ft const char *
				.Fn sysdecode_sigsegv_code "int si_code"
				.Ft const char *
				.Fn sysdecode_sigtrap_code "int si_code"
				.Ft const char *
				.Fn sysdecode_sockaddr_family "int sa_family"
				.Ft const char *
				.Fn sysdecode_socketdomain "int domain"
				.Ft const char *
				.Fn sysdecode_sockettype "int type"
				.Ft const char *
				.Fn sysdecode_sockopt_level "int level"
				.Ft const char *
				.Fn sysdecode_umtx_op "int op"
				.Ft const char *
				.Fn sysdecode_vmresult "int result"
				.Ft const char *
				.Fn sysdecode_whence "int whence"
				.Sh DESCRIPTION
				The
				.Nm
				functions return a text description of an integer value.
				The text description matches the name of a C macro with the same value as the
				sole function argument.
				.Dv NULL
				is returned if there is no matching C macro name.
				.Pp
				Most of these functions decode an argument passed to a system call:
				.Bl -column "Fn sysdecode_extattrnamespace" "Xr sched_setscheduler 2"
				.It Sy Function Ta Sy System Call Ta Sy Argument
				.It Fn sysdecode_acltype Ta Xr acl_get_file 3 Ta Fa type
				.It Fn sysdecode_atfd Ta Xr openat 2 Ta Fa fd
				.It Fn sysdecode_extattrnamespace Ta Xr extattr_get_fd 2 Ta Fa attrnamespace
				.It Fn sysdecode_fadvice Ta Xr posix_fadvise 2 Ta Fa advice
				.It Fn sysdecode_fcntl_cmd Ta Xr fcntl 2 Ta Fa cmd
				.It Fn sysdecode_idtype Ta
				.Xr procctl 2 ,
				.Xr waitid 2
				.Ta Fa idtype
				.It Fn sysdecode_kldsym_cmd Ta Xr kldsym 2 Ta Fa cmd
				.It Fn sysdecode_kldunload_flags Ta Xr kldunloadf 2 Ta Fa flags
				.It Fn sysdecode_lio_listio_mode Ta Xr lio_listio 2 Ta Fa mode
				.It Fn sysdecode_madvice Ta Xr madvise 2 Ta Fa advice
				.It Fn sysdecode_minherit_inherit Ta Xr minherit 2 Ta Fa inherit
				.It Fn sysdecode_msgctl_cmd Ta Xr msgctl 2 Ta Fa cmd
				.It Fn sysdecode_nfssvc_flags Ta Xr nfssvc 2 Ta Fa flags
				.It Fn sysdecode_prio_which Ta Xr getpriority 2 Ta Fa which
				.It Fn sysdecode_procctl_cmd Ta Xr procctl 2 Ta Fa cmd
				.It Fn sysdecode_ptrace_request Ta Xr ptrace 2 Ta Fa request
				.It Fn sysdecode_rlimit Ta Xr getrlimit 2 Ta Fa resource
				.It Fn sysdecode_rtprio_function Ta Xr rtprio 2 Ta Fa function
				.It Fn sysdecode_scheduler_policy Ta Xr sched_setscheduler 2 Ta Fa policy
				.It Fn sysdecode_semctl_cmd Ta Xr semctl 2 Ta Fa cmd
				.It Fn sysdecode_shmctl_cmd Ta Xr shmctl 2 Ta Fa cmd
				.It Fn sysdecode_shutdown_how Ta Xr shutdown 2 Ta Fa how
				.It Fn sysdecode_sigprocmask_how Ta Xr sigprocmask 2 Ta Fa how
				.It Fn sysdecode_sockopt_level Ta Xr getsockopt 2 Ta Fa level
				.It Fn sysdecode_umtx_op Ta Xr _umtx_op 2 Ta Fa op
				.It Fn sysdecode_whence Ta Xr lseek 2 Ta Fa whence
				.El
				.Pp
				These functions decode signal-specific signal codes stored in the
				.Fa si_code
				field of the
				.Vt siginfo_t
				object associated with an instance of signal:
				.Bl -column "Fn sysdecode_sigchld_code"
				.It Sy Function Ta Sy Signal
				.It Fn sysdecode_sigbus_code Ta Dv SIGBUS
				.It Fn sysdecode_sigchld_code Ta Dv SIGCHLD
				.It Fn sysdecode_sigfpe_code Ta Dv SIGFPE
				.It Fn sysdecode_sigill_code Ta Dv SIGILL
				.It Fn sysdecode_sigsegv_code Ta Dv SIGSEGV
				.It Fn sysdecode_sigtrap_code Ta Dv SIGBTRAP
				.El
				.Pp
				Other functions decode the values described below:
				.Bl -tag -width "Fn sysdecode_sockaddr_family"
				.It Fn sysdecode_ipproto
				An IP protocol.
				.It Fn sysdecode_signal
				A process signal.
				.It Fn sysdecode_sockaddr_family
				A socket address family.
				.It Fn sysdecode_socketdomain
				A socket domain.
				.It Fn sysdecode_vmresult
				The return value of a function in the virtual memory subsystem of the kernel
				indicating the status of the associated request.
				.El
				.Sh RETURN VALUES
				The
				.Nm
				functions return the name of a matching C macro or
				.Dv NULL
				if no matching C macro was found.
				.Sh SEE ALSO
				.Xr sysdecode 3 ,
				.Xr sysdecode_mask 3 ,
				.Xr sysdecode_sigcode 3