1VFSCANF(3P)                POSIX Programmer's Manual               VFSCANF(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

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

15       #include <stdarg.h>
16       #include <stdio.h>
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18       int vfscanf(FILE *restrict stream, const char *restrict format,
19              va_list arg);
20       int vscanf(const char *restrict format, va_list arg);
21       int vsscanf(const char *restrict s, const char *restrict format,
22              va_list arg);
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DESCRIPTION

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

35       Refer to fscanf().
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ERRORS

38       Refer to fscanf().
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40       The following sections are informative.
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EXAMPLES

43       None.
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APPLICATION USAGE

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

50       None.
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FUTURE DIRECTIONS

53       None.
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SEE ALSO

56       fscanf(),   the   Base   Definitions  volume  of  IEEE Std 1003.1-2001,
57       <stdarg.h>, <stdio.h>
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60       Portions of this text are reprinted and reproduced in  electronic  form
61       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
62       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
63       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
64       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
65       event of any discrepancy between this version and the original IEEE and
66       The Open Group Standard, the original IEEE and The Open Group  Standard
67       is  the  referee document. The original Standard can be obtained online
68       at http://www.opengroup.org/unix/online.html .
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72IEEE/The Open Group                  2003                          VFSCANF(3P)
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