libexplain/ftell_or_die.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/stdio.h>
#include <libexplain/ftell.h>
#include <libexplain/output.h>

Go to the source code of this file.

Functions
long	explain_ftell_on_error (FILE *fp)
long	explain_ftell_or_die (FILE *fp)

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Function Documentation

long explain_ftell_on_error

(

FILE *

fp

)

The explain_ftell_on_error function is used to call the ftell(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_ftell(3) function.

Parameters:

fp	The fp, exactly as to be passed to the ftell(3) system call.

Returns:

The value returned by the wrapped ftell(3) system call.

Example:

This function is intended to be used in a fashion similar to the following example:

 long result = explain_ftell_on_error(fp);
 if (result < 0)
 {
     ...cope with error
     ...no need to print error message
 }

Definition at line 27 of file ftell_or_die.c.

long explain_ftell_or_die

(

FILE *

fp

)

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

Parameters:

fp	The fp, exactly as to be passed to the ftell(3) system call.

Returns:

This function only returns on success, see ftell(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:

 long result = explain_ftell_or_die(fp);

Definition at line 45 of file ftell_or_die.c.