NAME¶
explain_adjtime_or_die - smoothly tune kernel clock and report errors
SYNOPSIS¶
#include <libexplain/adjtime.h>
void explain_adjtime_or_die(const struct timeval *delta, struct timeval
*olddelta);
int explain_adjtime_on_error(const struct timeval *delta, struct timeval
*olddelta);
DESCRIPTION¶
The
explain_adjtime_or_die function is used to call the
adjtime(2)
system call. On failure an explanation will be printed to
stderr,
obtained from the
explain_adjtime(3) function, and then the process
terminates by calling exit(EXIT_FAILURE).
The
explain_adjtime_on_error function is used to call the
adjtime(2) system call. On failure an explanation will be printed to
stderr, obtained from the
explain_adjtime(3) function, but still
returns to the caller.
- delta
- The delta, exactly as to be passed to the adjtime(2)
system call.
- olddelta
- The olddelta, exactly as to be passed to the
adjtime(2) system call.
RETURN VALUE¶
The
explain_adjtime_or_die function only returns on success, see
adjtime(2) for more information. On failure, prints an explanation and
exits, it does not return.
The
explain_adjtime_on_error function always returns the value return by
the wrapped
adjtime(2) system call.
EXAMPLE¶
The
explain_adjtime_or_die function is intended to be used in a fashion
similar to the following example:
explain_adjtime_or_die(delta, olddelta);
SEE ALSO¶
- adjtime(2)
- smoothly tune kernel clock
- explain_adjtime(3)
- explain adjtime(2) errors
- exit(2)
- terminate the calling process
COPYRIGHT¶
libexplain version 0.52
Copyright (C) 2009 Peter Miller