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
AUTHORS
Written by Kristaps Dzonsons <kristaps@bsd.lv>.
September 23, 2021 | OpenBSD 6.7 |