1VSNPRINTF(9)               Basic C Library Functions              VSNPRINTF(9)
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NAME

6       vsnprintf - Format a string and place it in a buffer
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SYNOPSIS

9       int vsnprintf(char * buf, size_t size, const char * fmt, va_list args);
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ARGUMENTS

12       buf
13           The buffer to place the result into
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15       size
16           The size of the buffer, including the trailing null space
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18       fmt
19           The format string to use
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21       args
22           Arguments for the format string
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DESCRIPTION

25       This function follows C99 vsnprintf, but has some extensions: pS output
26       the name of a text symbol with offset ps output the name of a text
27       symbol without offset pF output the name of a function pointer with its
28       offset pf output the name of a function pointer without its offset pR
29       output the address range in a struct resource pIS depending on
30       sa_family of ´struct sockaddr *´ print IPv4/IPv6 address piS depending
31       on sa_family of ´struct sockaddr *´ print IPv4/IPv6 address %*ph[CDN] a
32       variable-length hex string with a separator (supports up to 64 bytes of
33       the input) n is ignored
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35       The return value is the number of characters which would be generated
36       for the given input, excluding the trailing ´\0´, as per ISO C99. If
37       you want to have the exact number of characters written into buf as
38       return value (not including the trailing ´\0´), use vscnprintf. If the
39       return is greater than or equal to size, the resulting string is
40       truncated.
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42       Call this function if you are already dealing with a va_list. You
43       probably want snprintf instead.
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46Kernel Hackers Manual 2.6.         June 2019                      VSNPRINTF(9)
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