1BIO_PRINTF(3ossl)                   OpenSSL                  BIO_PRINTF(3ossl)
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NAME

6       BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf - formatted output
7       to a BIO
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SYNOPSIS

10        #include <openssl/bio.h>
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12        int BIO_printf(BIO *bio, const char *format, ...);
13        int BIO_vprintf(BIO *bio, const char *format, va_list args);
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15        int BIO_snprintf(char *buf, size_t n, const char *format, ...);
16        int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args);
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DESCRIPTION

19       BIO_printf() is similar to the standard C printf() function, except
20       that the output is sent to the specified BIO, bio, rather than standard
21       output.  All common format specifiers are supported.
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23       BIO_vprintf() is similar to the vprintf() function found on many
24       platforms, the output is sent to the specified BIO, bio, rather than
25       standard output.  All common format specifiers are supported. The
26       argument list args is a stdarg argument list.
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28       BIO_snprintf() is for platforms that do not have the common snprintf()
29       function. It is like sprintf() except that the size parameter, n,
30       specifies the size of the output buffer.
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32       BIO_vsnprintf() is to BIO_snprintf() as BIO_vprintf() is to
33       BIO_printf().
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RETURN VALUES

36       All functions return the number of bytes written, or -1 on error.  For
37       BIO_snprintf() and BIO_vsnprintf() this includes when the output buffer
38       is too small.
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NOTES

41       Except when n is 0, both BIO_snprintf() and BIO_vsnprintf() always
42       terminate their output with '\0'.  This includes cases where -1 is
43       returned, such as when there is insufficient space to output the whole
44       string.
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47       Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
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49       Licensed under the Apache License 2.0 (the "License").  You may not use
50       this file except in compliance with the License.  You can obtain a copy
51       in the file LICENSE in the source distribution or at
52       <https://www.openssl.org/source/license.html>.
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563.0.9                             2023-07-27                 BIO_PRINTF(3ossl)
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