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fgetws(3c)

Standard C Library Functions                                         getws(3C)



NAME
       getws, fgetws - get a wide-character string from a stream

SYNOPSIS
       #include <stdio.h>
       #include <widec.h>

       wchar_t *getws(wchar_t *ws);


       #include <stdio.h>
       #include <wchar.h>

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

DESCRIPTION
       The  getws()  function  reads  a string of characters from the standard
       input stream, stdin, converts these  characters  to  the  corresponding
       wide-character  codes,  and  writes them to the array pointed to by ws,
       until a newline character is read, converted and transferred to  ws  or
       an end-of-file condition is encountered. The wide-character string, ws,
       is then terminated with a null wide-character code.


       If the length of an input line exceeds the size  of  ws,  indeterminate
       behavior  may  result. For this reason, it is strongly recommended that
       the getws() function be avoided in favor of fgetws().

       Note -




         The use of the getws() function is discouraged since the user  cannot
         specify the length of the buffer passed to getws(). The length of the
         string read is unlimited. It is possible to overflow this  buffer  in
         such a way as to cause applications to fail, or possible system secu‐
         rity  violations.  Applications  should  use  the  fgetws()  function
         instead of the obsolescent getws() function.




       The  fgetws()  function reads characters from the stream, converts them
       to the corresponding wide-character  codes,  and  places  them  in  the
       wchar_t  array pointed to by ws until n−1 characters are read, or until
       a newline character is read, converted and transferred  to  ws,  or  an
       end-of-file condition is encountered. The wide-character string, ws, is
       then terminated with a null wide-character code.


       If an error occurs, the resulting value of the file position  indicator
       for the stream is indeterminate.


       The  fgetws()  function may mark the st_atime field of the file associ‐
       ated with stream for update. The st_atime  field  will  be  marked  for
       update  by  the  first  successful  execution  of fgetc(3C), fgets(3C),
       fgetwc(3C), fgetws(),  fread(3C),  fscanf(3C),  getc(3C),  getchar(3C),
       gets(3C), or scanf(3C) using stream that returns data not supplied by a
       prior call to ungetc(3C) or ungetwc(3C).

RETURN VALUES
       Upon successful completion, getws() and  fgetws()  return  ws.  If  the
       stream  is  at end-of-file, the end-of-file indicator for the stream is
       set and fgetws() returns a null pointer. For  standard-conforming  (see
       standards(7)) applications, if the end-of-file indicator for the stream
       is set, fgetws() returns a null pointer whether or not the stream is at
       end-of-file. If a read error occurs, the error indicator for the stream
       is set and fgetws() returns a null pointer and sets errno  to  indicate
       the error.

ERRORS
       See fgetwc(3C) for the conditions that will cause fgetws() to fail.

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Interface Stabilityfgetws() is Standard.  _ MT-LevelMT-
       Safe


SEE ALSO
       fread(3C),  ferror(3C),  fgetwc(3C),  getwc(3C),  putws(3C), scanf(3C),
       ungetc(3C), ungetwc(3C), standards(7), attributes(7)



Oracle Solaris 11.4               05 May 2016                        getws(3C)
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