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sysdecode_fcntl_arg(3) Library Functions Manual sysdecode_fcntl_arg(3)

sysdecode_fcntl_arg, sysdecode_fcntl_arg_p — output description of fcntl argument

library “libsysdecode”

#include <sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <sysdecode.h>

void
sysdecode_fcntl_arg(FILE *fp, int cmd, uintptr_t arg, int base);

bool
sysdecode_fcntl_arg_p(int cmd);

The () function outputs a text description of the optional arg argument to fcntl(2) to the stream fp. The type and format of arg are determined by cmd:
arg
int “FD_CLOEXEC” or the value of arg in the indicated base (one of 8, 10, or 16).
int File flags as output by sysdecode_fcntl_fileflags(3) with any unknown or remaining bits output in hexadecimal.
struct flock *
struct flock *
struct flock * The value of arg using the “%p” conversion specification.
Others int The value of arg in the indicated base (one of 8, 10, or 16).

The () function can be used to determine if a fcntl(2) command uses the optional third argument to fcntl(2). The function returns true if cmd accepts a third argument to fcntl(2) and false if it does not.

The sysdecode_fcntl_arg_p function returns true if cmd accepts a third argument to fcntl(2) and false if it does not.

sysdecode(3), sysdecode_fcntl_cmd(3), sysdecode_fcntl_fileflags(3)

November 24, 2017 FreeBSD-12.0