| explain_ustat_or_die(3) | Library Functions Manual | explain_ustat_or_die(3) |
explain_ustat_or_die - get file system statistics and report errors
#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);
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.
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.
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);
libexplain version 1.4
Copyright (C) 2009 Peter Miller