usr/src/usr.sbin/mtree/util.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)util.c      5.3 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char *
rlink(name)
        char *name;
{
        extern char path[];
        int len;
        static char lbuf[MAXPATHLEN];

        len = readlink(name, lbuf, sizeof(lbuf));
        if (len == -1) {
                (void)fprintf(stderr, "mtree: %s: %s.\n",
                    path + 2, strerror(errno));
                exit(1);
        }
        lbuf[len] = '\0';
        return(lbuf);
}

char *
emalloc(size)
        int size;
{
        char *p;

        /* NOSTRICT */
        if (!(p = malloc((u_int)size)))
                nomem();
        bzero(p, size);
        return(p);
}

nomem()
{
        (void)fprintf(stderr, "mtree: %s.\n", strerror(ENOMEM));
        exit(1);
}