explain_fseeko_or_die3
Seek to or report file position and report errors
Usage
#include <libexplain/fseeko.h>
void explain_fseeko_or_die(FILE *fp, off_t offset, int whence);
int explain_fseeko_on_error(FILE *fp, off_t offset, int whence);
Overview
The explain_fseeko_or_die function is used to call the fseeko(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_fseeko(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_fseeko_on_error function is used to call the fseeko(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_fseeko(3) function, but still returns to the caller.
fp
|
The fp, exactly as to be passed to the fseeko(3) system call. |
|---|---|
offset
|
The offset, exactly as to be passed to the fseeko(3) system call. |
whence
|
The whence, exactly as to be passed to the fseeko(3) system call. |
Return value
The explain_fseeko_or_die function only returns on success, see fseeko(3) for more information. On failure, prints an explanation and exits, it does not return.
The explain_fseeko_on_error function always returns the value return by the wrapped fseeko(3) system call.
Examples
The explain_fseeko_or_die function is intended to be used in a fashion similar to the following example:
explain_fseeko_or_die(fp, offset, whence);Releases
Unchanged in 5 releases since Debian 9 (Stretch).