| FGETWLN(3) | Library Functions Manual | FGETWLN(3) | 
fgetwln —
#include <stdio.h>
#include <wchar.h>
wchar_t *
  
  fgetwln(FILE
    * restrict stream, size_t
    * restrict len);
fgetwln() function returns a pointer to the next
  line from the stream referenced by stream. This line is
  not a standard wide-character string as it does not end with
  a terminating null wide character. The length of the line, including the final
  newline, is stored in the memory location to which len
  points. (Note, however, that if the line is the last in a file that does not
  end in a newline, the returned text will not contain a newline.)
NULL is returned. The
  fgetwln() function does not distinguish between
  end-of-file and error; the routines
  feof(3) and
  ferror(3) must be used to
  determine which occurred. If an error occurs, the global variable
  errno is set to indicate the error. The end-of-file
  condition is remembered, even on a terminal, and all subsequent attempts to
  read will return NULL until the condition is cleared
  with clearerr(3).
The text to which the returned pointer points may be modified, provided that no changes are made beyond the returned size. These changes are lost as soon as the pointer becomes invalid.
EBADF]The fgetwln() function may also fail and
    set errno for any of the errors specified for the
    routines mbrtowc(3),
    realloc(3), or
    read(2).
| July 16, 2004 | NetBSD 9.4 |