libinstzones/common/zones_paths.c

5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * CDDL HEADER START
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * The contents of this file are subject to the terms of the
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Common Development and Distribution License (the "License").
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * You may not use this file except in compliance with the License.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * or http://www.opensolaris.org/os/licensing.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * See the License for the specific language governing permissions
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * and limitations under the License.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * When distributing Covered Code, include this CDDL HEADER in each
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * If applicable, add the following below this CDDL HEADER, with the
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * fields enclosed by brackets "[]" replaced with your own identifying
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * information: Portions Copyright [yyyy] [name of copyright owner]
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * CDDL HEADER END
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
6e1ae2a33c618c4c2b14aec7d2f21743ddea5837Gary Pennington * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * System includes
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <stdio.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <limits.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <stdlib.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <unistd.h>
af1222373b60d56d6b0e630911372d4162b7787bJan Kryl#include <libgen.h>
af1222373b60d56d6b0e630911372d4162b7787bJan Kryl#include <errno.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <string.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <fcntl.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <sys/types.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <sys/stat.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <signal.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <assert.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <locale.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <libintl.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * local includes
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include "instzones_lib.h"
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include "zones_strings.h"
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#define isdot(x)    ((x[0] == '.') && (!x[1] || (x[1] == '/')))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#define isdotdot(x) ((x[0] == '.') && (x[1] == '.') && \
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            (!x[2] || (x[2] == '/')))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * *****************************************************************************
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * global external (public) functions
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * *****************************************************************************
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Name:    z_make_zone_root
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Description: Given its zonepath, generate a string representing the
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *              mountpoint of where the root path for a nonglobal zone is
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *              mounted.  The zone is mounted using 'zoneadm', which mounts
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *              the zone's filesystems wrt <zonepath>/lu/a
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Arguments:   zone_path - non-NULL pointer to string representing zonepath
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Returns: char *  - pointer to string representing zonepath of zone
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *      NULL    - if zone_path is NULL.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Notes:   The string returned is in static storage and should not be
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *              free()ed by the caller.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandchar *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandz_make_zone_root(char *zone_path)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland{
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    static char zone_root_buf[MAXPATHLEN];
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    if (zone_path == NULL)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        return (NULL);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    (void) snprintf(zone_root_buf, MAXPATHLEN, "%s%slu/a", zone_path,
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        (zone_path[0] != '\0' &&
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        zone_path[strlen(zone_path) - 1] == '/') ? "" : "/");
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    return (zone_root_buf);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland}
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandvoid
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandz_path_canonize(char *a_file)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland{
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    char    *pt;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    char    *last;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    int level;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    /* remove references such as "./" and "../" and "//" */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    for (pt = a_file; *pt; /* void */) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        if (isdot(pt)) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            (void) strcpy(pt, pt[1] ? pt+2 : pt+1);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        } else if (isdotdot(pt)) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            level = 0;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            last = pt;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            do {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                level++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                last += 2;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                if (*last) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                    last++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            } while (isdotdot(last));
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            --pt; /* point to previous '/' */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            while (level--) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                if (pt <= a_file) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                    return;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                while ((*--pt != '/') && (pt > a_file))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                    ;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            if (*pt == '/') {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            (void) strcpy(pt, last);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        } else {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            while (*pt && (*pt != '/')) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            if (*pt == '/') {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                while (pt[1] == '/') {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                    (void) strcpy(pt, pt+1);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    if ((--pt > a_file) && (*pt == '/')) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        *pt = '\0';
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland}
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandvoid
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandz_canoninplace(char *src)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland{
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    char *dst;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    char *src_start;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    /* keep a ptr to the beginning of the src string */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    src_start = src;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    dst = src;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    while (*src) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        if (*src == '/') {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            *dst++ = '/';
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            while (*src == '/')
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland                src++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        } else
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland            *dst++ = *src++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    /*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland     * remove any trailing slashes, unless the whole string is just "/".
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland     * If the whole string is "/" (i.e. if the last '/' cahr in dst
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland     * in the beginning of the original string), just terminate it
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland     * and return "/".
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland     */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    if ((*(dst - 1) == '/') && ((dst - 1) != src_start))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland        dst--;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland    *dst = '\0';
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland}