NAME
explain_ustat_or_die - get file system statistics and report errors
SYNOPSIS
#include <libexplain/ustat.h>
void explain_ustat_or_die(dev_t dev, struct ustat *ubuf);
int explain_ustat_on_error(dev_t dev, struct ustat *ubuf);
DESCRIPTION
The explain_ustat_or_die function is used to call the ustat(2) system
call. On failure an explanation will be printed to stderr, obtained
from the explain_ustat(3) function, and then the process terminates by
calling exit(EXIT_FAILURE).
The explain_ustat_on_error function is used to call the ustat(2) system
call. On failure an explanation will be printed to stderr, obtained
from the explain_ustat(3) function, but still returns to the caller.
dev The dev, exactly as to be passed to the ustat(2) system call.
ubuf The ubuf, exactly as to be passed to the ustat(2) system call.
RETURN VALUE
The explain_ustat_or_die function only returns on success, see ustat(2)
for more information. On failure, prints an explanation and exits, it
does not return.
The explain_ustat_on_error function always returns the value return by
the wrapped ustat(2) system call.
EXAMPLE
The explain_ustat_or_die function is intended to be used in a fashion
similar to the following example:
explain_ustat_or_die(dev, ubuf);
SEE ALSO
ustat(2)
get file system statistics
explain_ustat(3)
explain ustat(2) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.19
Copyright (C) 2009 Peter Miller
explain_ustat_or_die(3)