fgetws(3) — Linux manual page

fgetws(3)               Library Functions Manual               fgetws(3)

NAME

       fgetws - read a wide-character string from a FILE stream

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wchar.h>

       wchar_t *fgetws(wchar_t ws[restrict .n], int n, FILE *restrict stream);

DESCRIPTION

       The fgetws() function is the wide-character equivalent of the
       fgets(3) function.  It reads a string of at most n-1 wide
       characters into the wide-character array pointed to by ws, and
       adds a terminating null wide character (L'\0').  It stops reading
       wide characters after it has encountered and stored a newline
       wide character.  It also stops when end of stream is reached.

       The programmer must ensure that there is room for at least n wide
       characters at ws.

       For a nonlocking counterpart, see unlocked_stdio(3).

RETURN VALUE

       The fgetws() function, if successful, returns ws.  If end of
       stream was already reached or if an error occurred, it returns
       NULL.

ATTRIBUTES

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ fgetws()                            │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

       The behavior of fgetws() depends on the LC_CTYPE category of the
       current locale.

       In the absence of additional information passed to the fopen(3)
       call, it is reasonable to expect that fgetws() will actually read
       a multibyte string from the stream and then convert it to a wide-
       character string.

       This function is unreliable, because it does not permit to deal
       properly with null wide characters that may be present in the
       input.

SEE ALSO

       fgetwc(3), unlocked_stdio(3)

COLOPHON

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Linux man-pages 6.9.1          2024-06-15                      fgetws(3)

Pages that refer to this page: fgetc(3), fgetwc(3), gets(3)

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