NAME
sysdecode_mask,
sysdecode_accessmode,
sysdecode_atflags,
sysdecode_capfcntlrights,
sysdecode_fcntl_fileflags,
sysdecode_fileflags,
sysdecode_filemode,
sysdecode_flock_operation,
sysdecode_mlockall_flags,
sysdecode_mmap_flags,
sysdecode_mmap_prot,
sysdecode_mount_flags,
sysdecode_msg_flags,
sysdecode_msync_flags,
sysdecode_open_flags,
sysdecode_pipe2_flags,
sysdecode_reboot_howto,
sysdecode_rfork_flags,
sysdecode_semget_flags,
sysdecode_sendfile_flags,
sysdecode_shmat_flags,
sysdecode_sctp_nxt_flags,
sysdecode_sctp_rcv_flags,
sysdecode_sctp_snd_flags,
sysdecode_socket_type,
sysdecode_thr_create_flags,
sysdecode_umtx_cvwait_flags,
sysdecode_umtx_rwlock_flags,
sysdecode_vmprot,
sysdecode_wait4_options,
sysdecode_wait6_options —
print name of various bitmask
values
LIBRARY
library “libsysdecode”
SYNOPSIS
#include
<sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <sysdecode.h>
bool
sysdecode_access_mode(FILE
*fp, int mode,
int *rem);
bool
sysdecode_atflags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_cap_fcntlrights(FILE
*fp, uint32_t
rights, uint32_t
*rem);
bool
sysdecode_fcntl_fileflags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_fileflags(FILE
*fp, fflags_t
flags, fflags_t
*rem);
bool
sysdecode_filemode(FILE
*fp, int mode,
int *rem);
bool
sysdecode_flock_operation(FILE
*fp, int operation,
int *rem);
bool
sysdecode_mlockall_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_mmap_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_mmap_prot(FILE
*fp, int prot,
int *rem);
bool
sysdecode_mount_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_msg_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_msync_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_open_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_pipe2_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_reboot_howto(FILE
*fp, int howto,
int *rem);
bool
sysdecode_rfork_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_sctp_nxt_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_sctp_rcv_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_sctp_snd_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_semget_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_sendfile_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_shmat_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_socket_type(FILE
*fp, int type,
int *rem);
bool
sysdecode_thr_create_flags(FILE
*fp, int flags,
int *rem);
bool
sysdecode_umtx_cvwait_flags(FILE
*fp, u_long flags,
u_long *rem);
bool
sysdecode_umtx_rwlock_flags(FILE
*fp, u_long flags,
u_long *rem);
bool
sysdecode_vmprot(FILE
*fp, int type,
int *rem);
bool
sysdecode_wait4_options(FILE
*fp, int options,
int *rem);
bool
sysdecode_wait6_options(FILE
*fp, int options,
int *rem);
DESCRIPTION
Thesysdecode_mask functions are used to generate a text
description of an integer value built from a mask of bitfields. The text
description lists the C macros for field values joined by pipe
‘|’ characters matching the format used in C source code. Most
of the values decoded by these functions are passed as arguments to system
calls, though some of these values are used internally in the kernel.
Each function writes the text description to
fp. The second argument should contain the integer
value to be decoded. The rem argument is set to the
value of any bits that were not decoded (bit fields that do not have a
corresponding C macro). rem may be set to
NULL if the caller does not need this value. Each
function returns true if any bit fields in the value
were decoded and false if no bit fields were
decoded.
Most of these functions decode an argument passed to a system call:
Other functions decode the values described below:
sysdecode_fcntl_fileflags()- The file flags used with the
F_GETFLandF_SETFLfcntl(2) commands. sysdecode_sctp_nxt_flags()- The nxt_flags member of a struct sctp_nxtinfo.
sysdecode_sctp_rcv_flags()- The rcv_flags member of a struct sctp_rcvinfo.
sysdecode_sctp_snd_flags()- The snd_flags member of a struct sctp_sndinfo.
sysdecode_umtx_cvwait_flags()- The val argument to
_umtx_op(2) for
UMTX_OP_CV_WAIToperations. sysdecode_umtx_rwlock_flags()- The val argument to
_umtx_op(2) for
UMTX_OP_RW_RDLOCKoperations. sysdecode_vmprot()- The memory protection flags stored in vm_prot_t variables.
RETURN VALUES
The sysdecode_mask functions return
true if any bit fields in the value were decoded and
false if no bit fields were decoded.