explain_ftell_or_die(3) - Linux man page
Name
explain_ftell_or_die - get stream position and report errors
Synopsis
#include <libexplain/ftell.h>
long explain_ftell_or_die(FILE *fp);
long explain_ftell_on_error(FILE *fp);
Description
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).
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, but still returns to the caller.
- fp
The fp, exactly as to be passed to the ftell(3) system call.
Return Value
The explain_ftell_or_die function only returns on success, see ftell(3) for more information. On failure, prints an explanation and exits, it does not return.
The explain_ftell_on_error function always returns the value return by the wrapped ftell(3) system call.
Example
The explain_ftell_or_die function is intended to be used in a fashion similar to the following example:
-
long result = explain_ftell_or_die(fp);
See Also
ftell(3)
- get stream position
- explain_ftell(3)
- explain ftell(3) errors
- exit(2)
terminate the calling process
Copyright
libexplain version 0.52
Copyright © 2010 Peter Miller