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KPRINTF (9)
NetBSD Kernel Developer’s Manual
KPRINTF (9)
struct ifnet ∗ respectively as first argument and prefix the log message with the corresponding device
or interface name.
The aprint_get_error_count() function reports the number of errors and resets the counter to 0.
If AB_SILENT is set, none of the autoconfiguration message printing routines send output to the console.
The AB_VERBOSE and AB_DEBUG flags override AB_SILENT.
RETURN VALUES
The snprintf() and vsnprintf() functions return the number of characters placed in the buffer buf.
This is different to the user-space functions of the same name.
The tprintf_open() function returns NULL if no terminal handle could be acquired.
SEE ALSO
printf(1), printf(3), bitmask_snprintf(9)
CODE REFERENCES
sys/kern/subr_prf.c
HISTORY
The sprintf() and vsprintf() unsized string formatting functions are supported for compatibility only,
and are not documented here. New code should use the size-limited snprintf() and vsnprintf() functions instead.
In NetBSD 1.5 and earlier, printf() supported more format strings than the user space printf(). These
nonstandard format strings are no longer supported. For the functionality provided by the former %b format
string, see bitmask_snprintf(9).
The aprint_normal(), aprint_naive(), aprint_verbose(), and aprint_debug() functions
first appeared in BSD/OS.
BUGS
The uprintf() and ttyprintf() functions should be used sparingly, if at all. Where multiple lines of
output are required to reach a process’s controlling terminal, tprintf() is preferred.
NetBSD 3.0
September 24, 2007
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