usr/src/sbin/dumplfs/misc.c

/*-
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)misc.c      8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "extern.h"

void
get(fd, off, p, len)
        int fd;
        off_t off;
        void *p;
        size_t len;
{
        int rbytes;

        if (lseek(fd, off, SEEK_SET) < 0)
                err("%s: %s", special, strerror(errno));
        if ((rbytes = read(fd, p, len)) < 0)
                err("%s: %s", special, strerror(errno));
        if (rbytes != len)
                err("%s: short read (%d, not %d)", special, rbytes, len);
}

#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

void
#if __STDC__
err(const char *fmt, ...)
#else
err(fmt, va_alist)
        char *fmt;
        va_dcl
#endif
{
        va_list ap;
#if __STDC__
        va_start(ap, fmt);
#else
        va_start(ap);
#endif
        (void)fprintf(stderr, "dumplfs: ");
        (void)vfprintf(stderr, fmt, ap);
        va_end(ap);
        (void)fprintf(stderr, "\n");
        exit(1);
        /* NOTREACHED */
}