1VFSCANF(P)                 POSIX Programmer's Manual                VFSCANF(P)
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NAME

6       vfscanf, vscanf, vsscanf - format input of a stdarg argument list
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SYNOPSIS

9       #include <stdarg.h>
10       #include <stdio.h>
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12       int vfscanf(FILE *restrict stream, const char *restrict format,
13              va_list arg);
14       int vscanf(const char *restrict format, va_list arg);
15       int vsscanf(const char *restrict s, const char *restrict format,
16              va_list arg);
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DESCRIPTION

20       The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to
21       the scanf(), fscanf(), and  sscanf()  functions,  respectively,  except
22       that  instead of being called with a variable number of arguments, they
23       are called with an argument list as defined in the  <stdarg.h>  header.
24       These  functions  shall not invoke the va_end macro. As these functions
25       invoke the va_arg macro, the value of ap after the return  is  unspeci‐
26       fied.
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RETURN VALUE

29       Refer to fscanf() .
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ERRORS

32       Refer to fscanf() .
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34       The following sections are informative.
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EXAMPLES

37       None.
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APPLICATION USAGE

40       Applications  using  these functions should call va_end( ap) afterwards
41       to clean up.
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RATIONALE

44       None.
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FUTURE DIRECTIONS

47       None.
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SEE ALSO

50       fscanf()  ,  the  Base  Definitions  volume  of   IEEE Std 1003.1-2001,
51       <stdarg.h>, <stdio.h>
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54       Portions  of  this text are reprinted and reproduced in electronic form
55       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
56       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
57       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
58       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
59       event of any discrepancy between this version and the original IEEE and
60       The  Open Group Standard, the original IEEE and The Open Group Standard
61       is the referee document. The original Standard can be  obtained  online
62       at http://www.opengroup.org/unix/online.html .
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66IEEE/The Open Group                  2003                           VFSCANF(P)
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