KCGI_BUF_PRINTF(3) Library Functions Manual KCGI_BUF_PRINTF(3)
NAME
kcgi_buf_printf — put variable content into a kcgi buffer
LIBRARY
library “libkcgi”
SYNOPSIS
#include <sys/types.h>
#include <stdarg.h>
#include <stdint.h>
#include <kcgi.h>
enum kcgi_err
kcgi_buf_puts(struct kcgi_buf *buf, const char *fmt, ...);
DESCRIPTION
Appends output according to the given fmt to a buffer buf. The format is as for printf(3). Buffers must be initialised to zero with memset(3) prior to first use.
RETURN VALUES
Returns an enum kcgi_err indicating the error state.
KCGI_OK
Success (not an error).
KCGI_ENOMEM
Internal memory allocation failure.
KCGI_HUP
The output connection has been terminated. For FastCGI connections, the current connection should be released with khttp_free(3) and parse loop reentered.
KCGI_FORM
The connection is still expecting headers with khttp_head(3). Indicates that khttp_body(3) did not return with success or was not invoked. For FastCGI connections, the current connection should be released with khttp_free(3) and parse loop reentered.
KCGI_SYSTEM
Internal system error writing to the output stream.
EXAMPLES
The following creates a simple NUL-terminated buffer and outputs its contents. It does not perform any error checking.
struct kcgi_buf buf;
memset(&buf,
0, sizeof(struct kcgi_buf));
kcgi_buf_printf(&buf, "number %d", 1);
puts(buf.buf); /* Emits "number 1" */
free(buf.buf);
SEE ALSO
kcgi_buf_putc(3), kcgi_buf_puts(3), kcgi_buf_write(3)
AUTHORS
Written by Kristaps Dzonsons <[email protected]>. GNU $Mdocdate$ KCGI_BUF_PRINTF(3)