libexplain  1.4.D001
Functions
libexplain/ftello_or_die.c File Reference
#include <libexplain/ac/errno.h>
#include <libexplain/ac/stdio.h>
#include <libexplain/ac/sys/types.h>
#include <libexplain/ftello.h>
#include <libexplain/output.h>

Go to the source code of this file.

Functions

off_t explain_ftello_or_die (FILE *fp)
off_t explain_ftello_on_error (FILE *fp)

Function Documentation

The explain_ftello_on_error function is used to call the ftello(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_ftello(3) function.

Parameters:
fpThe fp, exactly as to be passed to the ftello(3) system call.
Returns:
The value returned by the wrapped ftello(3) system call.
Example:
This function is intended to be used in a fashion similar to the following example:
 off_t result = explain_ftello_on_error(fp);
 if (result < 0)
 {
     ...cope with error
     ...no need to print error message
 }

Definition at line 42 of file ftello_or_die.c.

off_t explain_ftello_or_die ( FILE *  fp)

The explain_ftello_or_die function is used to call the ftello(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_ftello(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

Parameters:
fpThe fp, exactly as to be passed to the ftello(3) system call.
Returns:
This function only returns on success, see ftello(3) for more information. On failure, prints an explanation and exits, it does not return.
Example:
This function is intended to be used in a fashion similar to the following example:

Definition at line 28 of file ftello_or_die.c.