vslog2f()

Log a printf-style string in a slog2 buffer (varargs)

Synopsis:

#include <sys/slog2.h>

int vslog2f( slog2_buffer_t buffer,
             uint16_t code,
             uint8_t severity,
             const char* format,
             va_list arglist );

Arguments:

buffer

The handle of the buffer you want to log the message in, or NULL to use the default buffer that you specified earlier with slog2_set_default_buffer().

code

A user-specified code that you want to be associated with the message. The slog2 system doesn't interpret this code in any way.

severity

The severity level of this log item; one of:

SLOG2_SHUTDOWN
SLOG2_CRITICAL
SLOG2_ERROR
SLOG2_WARNING
SLOG2_NOTICE
SLOG2_INFO
SLOG2_DEBUG1
SLOG2_DEBUG2

For more information, see the entry for slog2_register().

format

A printf-formatted character string used to define the log.

arglist

A va_list of the additional arguments required by the format string.

Library:

libslog2

Use the -l slog2 option to qcc to link against this library.

Description:

The vslog2f() function logs a printf-style ASCII-text string in the specified slog2 buffer.

This function is a “varargs” version of slog2f().

CAUTION:

Don't use vslog2f() after using slog2_reset(). The slog2_reset() function unmaps all instances, which releases all buffer handles and triggers the SIGSEGV signal if vslog2f() tries to dereference the buffer pointer.

Returns:

0 on success, or -1 if an error occurred.

Errors:

EBUSY: The logger couldn't obtain a buffer within the number of retries that you specified when you registered the buffer set; see slog2_register().
EFAULT: You specified NULL for buffer, but there's no default buffer.
EINVAL: The format string is invalid.
EPERM: The process hasn't registered with slog2.

Classification:

QNX Neutrino

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes