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Man Pages
explain_telldir_or_die(3) FreeBSD Library Functions Manual explain_telldir_or_die(3)

explain_telldir_or_die - current location in directory and report errors

#include <libexplain/telldir.h>
off_t explain_telldir_or_die(DIR *dir);
 
off_t explain_telldir_on_error(DIR *dir);

The explain_telldir_or_die function is used to call the telldir(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_telldir(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_telldir_on_error function is used to call the telldir(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_telldir(3) function, but still returns to the caller.
dir
The dir, exactly as to be passed to the telldir(3) system call.

The explain_telldir_or_die function only returns on success, see telldir(3) for more information. On failure, prints an explanation and exits, it does not return.
The explain_telldir_on_error function always returns the value return by the wrapped telldir(3) system call.

The explain_telldir_or_die function is intended to be used in a fashion similar to the following example:
off_t result = explain_telldir_or_die(dir);

telldir(3)
return current location in directory stream
explain_telldir(3)
explain telldir(3) errors
exit(2)
terminate the calling process

libexplain version 1.3
 
Copyright (C) 2009 Peter Miller

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