формат вывода списка аргументов stdarg (format output of a stdarg argument list)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
vdprintf, vfprintf, vprintf, vsnprintf, vsprintf — format output
of a stdarg argument list
Синопсис (Synopsis)
#include <stdarg.h>
#include <stdio.h>
int vdprintf(int fildes, const char *restrict format, va_list ap);
int vfprintf(FILE *restrict stream, const char *restrict format,
va_list ap);
int vprintf(const char *restrict format, va_list ap);
int vsnprintf(char *restrict s, size_t n, const char *restrict format,
va_list ap);
int vsprintf(char *restrict s, const char *restrict format, va_list ap);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The vdprintf(), vfprintf(), vprintf(), vsnprintf(), and
vsprintf() functions shall be equivalent to the dprintf(),
fprintf(), printf(), snprintf(), and sprintf() functions
respectively, except that instead of being called with a variable
number of arguments, they are called with an argument list as
defined by <stdarg.h>.
These functions shall not invoke the va_end macro. As these
functions invoke the va_arg macro, the value of ap after the
return is unspecified.
Возвращаемое значение (Return value)
Refer to fprintf(3p).
Ошибки (Error)
Refer to fprintf(3p).
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
Applications using these functions should call va_end(ap)
afterwards to clean up.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
Section 2.5, Standard I/O Streams, fprintf(3p)
The Base Definitions volume of POSIX.1‐2017, stdarg.h(0p),
stdio.h(0p)
