libexplain  1.4.D001
Functions
libexplain/buffer/errno/pread.c File Reference
#include <libexplain/ac/errno.h>
#include <libexplain/buffer/errno/lseek.h>
#include <libexplain/buffer/errno/pread.h>
#include <libexplain/buffer/errno/read.h>
#include <libexplain/buffer/fildes.h>
#include <libexplain/buffer/off_t.h>
#include <libexplain/buffer/pointer.h>
#include <libexplain/buffer/size_t.h>
#include <libexplain/explanation.h>

Go to the source code of this file.

Functions

static void explain_buffer_errno_pread_system_call (explain_string_buffer_t *sb, int errnum, int fildes, void *data, size_t data_size, off_t offset)
static void explain_buffer_errno_pread_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, int fildes, void *data, size_t data_size, off_t offset)
void explain_buffer_errno_pread (explain_string_buffer_t *sb, int errnum, int fildes, void *data, size_t data_size, off_t offset)

Function Documentation

void explain_buffer_errno_pread ( explain_string_buffer_t sb,
int  errnum,
int  fildes,
void *  data,
size_t  data_size,
off_t  offset 
)

The explain_buffer_errno_pread function is used to obtain an explanation of an error returned by the pread(2) system call. The least the message will contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail.

Parameters:
sbThe string buffer to print the message into. If a suitable buffer is specified, this function is thread safe.
errnumThe error value to be decoded, usually obtained from the errno global variable just before this function is called. This is necessary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno.
fildesThe original fildes, exactly as passed to the pread(2) system call.
dataThe original data, exactly as passed to the pread(2) system call.
data_sizeThe original data_size, exactly as passed to the pread(2) system call.
offsetThe original offset, exactly as passed to the pread(2) system call.

Definition at line 98 of file pread.c.

static void explain_buffer_errno_pread_explanation ( explain_string_buffer_t sb,
int  errnum,
const char *  syscall_name,
int  fildes,
void *  data,
size_t  data_size,
off_t  offset 
) [static]

Definition at line 49 of file pread.c.

static void explain_buffer_errno_pread_system_call ( explain_string_buffer_t sb,
int  errnum,
int  fildes,
void *  data,
size_t  data_size,
off_t  offset 
) [static]

Definition at line 32 of file pread.c.