9fc0a7f722
of the sets after an error. A side effect is that it now does fetch-install-fetch-install..., not fetch-...-fetch-install-...install. The set selection code now uses a byte per set (not a bit-pattern) removing the restriction of 32 sets, and allowing a per set status display (TBC). Also TBC is deleting sets from /usr/INSTALL. However I believe it works...
690 lines
18 KiB
C
690 lines
18 KiB
C
/* $NetBSD: target.c,v 1.48 2006/01/12 22:02:44 dsl Exp $ */
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/*
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* Copyright 1997 Jonathan Stone
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Jonathan Stone.
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* 4. The name of Jonathan Stone may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JONATHAN STONE ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* Copyright below applies to the realpath() code */
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/*
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* Copyright (c) 1989, 1991, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: target.c,v 1.48 2006/01/12 22:02:44 dsl Exp $");
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#endif
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/*
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* target.c -- path-prefixing routines to access the target installation
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* filesystems. Makes the install tools more independent of whether
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* we're installing into a separate filesystem hierarchy mounted under
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* /targetroot, or into the currently active root mounted on /.
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*/
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#include <sys/param.h> /* XXX vm_param.h always defines TRUE*/
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/stat.h> /* stat() */
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#include <sys/mount.h> /* statfs() */
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <curses.h> /* defines TRUE, but checks */
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#include <errno.h>
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#include "defs.h"
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#include "md.h"
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#include "msg_defs.h"
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#include "menu_defs.h"
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/*
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* local prototypes
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*/
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static void make_prefixed_dir (const char *prefix, const char *path);
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static int do_target_chdir (const char *dir, int flag);
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int target_test(unsigned int mode, const char *path);
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int target_test_dir (const char *path); /* deprecated */
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int target_test_file (const char *path); /* deprecated */
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int target_test_symlink (const char *path); /* deprecated */
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void backtowin(void);
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void unwind_mounts(void);
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/* Record a mount for later unwinding of target mounts. */
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struct unwind_mount {
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struct unwind_mount *um_prev;
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char um_mountpoint[4]; /* Allocated longer... */
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};
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/* Unwind-mount stack */
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struct unwind_mount *unwind_mountlist = NULL;
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/*
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* Debugging options
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*/
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/*#define DEBUG_ROOT*/ /* turn on what-is-root? debugging. */
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/*#define DEBUG_UNWIND*/ /* turn on unwind-target-mount debugging. */
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/*
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* debugging helper. curses...
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*/
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#if defined(DEBUG) || defined(DEBUG_ROOT)
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void
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backtowin(void)
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{
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fflush(stdout); /* curses does not leave stdout linebuffered. */
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getchar(); /* wait for user to press return */
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wrefresh(stdscr);
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}
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#endif
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/*
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* Is the root partition we're running from the same as the root
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* which the user has selected to install/upgrade?
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* Uses global variable "diskdev" to find the selected device for
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* install/upgrade.
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*/
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int
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target_already_root(void)
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{
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if (strcmp(diskdev, "") == 0)
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/* No root partition was ever selected.
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* Assume that the currently mounted one should be used
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*/
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return 1;
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return is_active_rootpart(diskdev, rootpart);
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}
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/*
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* Is this device partition (e.g., "sd0a") mounted as root?
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*/
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int
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is_active_rootpart(const char *dev, int ptn)
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{
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int mib[2];
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char rootdev[SSTRSIZE];
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int rootptn;
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size_t varlen;
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mib[0] = CTL_KERN;
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mib[1] = KERN_ROOT_DEVICE;
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varlen = sizeof(rootdev);
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if (sysctl(mib, 2, rootdev, &varlen, NULL, 0) < 0)
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return 1;
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if (strcmp(dev, rootdev) != 0)
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return 0;
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mib[1] = KERN_ROOT_PARTITION;
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varlen = sizeof rootptn;
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if (sysctl(mib, 2, &rootptn, &varlen, NULL, 0) < 0)
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return 1;
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return ptn == rootptn;
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}
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/*
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* Pathname prefixing glue to support installation either
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* from in-ramdisk miniroots or on-disk diskimages.
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* If our root is on the target disk, the install target is mounted
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* on /targetroot and we need to prefix installed pathnames with /targetroot.
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* otherwise we are installing to the currently-active root and
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* no prefix is needed.
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*/
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const char *
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target_prefix(void)
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{
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/*
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* XXX fetch sysctl variable for current root, and compare
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* to the devicename of the install target disk.
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*/
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return(target_already_root() ? "" : targetroot_mnt);
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}
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/*
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* concatenate two pathnames.
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* XXX returns either input args or result in a static buffer.
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* The caller must copy if it wants to use the pathname past the
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* next call to a target-prefixing function, or to modify the inputs..
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* Used only internally so this is probably safe.
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*/
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const char *
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concat_paths(const char *prefix, const char *suffix)
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{
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static char real_path[MAXPATHLEN];
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/* absolute prefix and null suffix? */
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if (prefix[0] == '/' && suffix[0] == 0)
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return prefix;
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/* null prefix and absolute suffix? */
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if (prefix[0] == 0 && suffix[0] == '/')
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return suffix;
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/* avoid "//" */
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if (suffix[0] == '/' || suffix[0] == 0)
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snprintf(real_path, sizeof(real_path), "%s%s", prefix, suffix);
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else
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snprintf(real_path, sizeof(real_path), "%s/%s",
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prefix, suffix);
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return (real_path);
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}
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/*
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* Do target prefix expansion on a pathname.
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* XXX uses concat_paths and so returns result in a static buffer.
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* The caller must copy if it wants to use the pathname past the
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* next call to a target-prefixing function, or to modify the inputs..
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* Used only internally so this is probably safe.
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*
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* Not static so other functions can generate target related file names.
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*/
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const char *
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target_expand(const char *tgtpath)
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{
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return concat_paths(target_prefix(), tgtpath);
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}
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/* Make a directory, with a prefix like "/targetroot" or possibly just "". */
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static void
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make_prefixed_dir(const char *prefix, const char *path)
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{
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run_program(0, "/bin/mkdir -p %s", concat_paths(prefix, path));
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}
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/* Make a directory with a pathname relative to the installation target. */
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void
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make_target_dir(const char *path)
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{
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make_prefixed_dir(target_prefix(), path);
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}
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static int
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do_target_chdir(const char *dir, int must_succeed)
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{
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const char *tgt_dir;
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int error;
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error = 0;
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tgt_dir = target_expand(dir);
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#ifndef DEBUG
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/* chdir returns -1 on error and sets errno. */
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if (chdir(tgt_dir) < 0)
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error = errno;
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if (logging) {
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fprintf(logfp, "cd to %s\n", tgt_dir);
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fflush(logfp);
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}
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if (scripting) {
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scripting_fprintf(NULL, "cd %s\n", tgt_dir);
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fflush(script);
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}
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if (error && must_succeed) {
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fprintf(stderr, msg_string(MSG_realdir),
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target_prefix(), strerror(error));
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if (logging)
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fprintf(logfp, msg_string(MSG_realdir),
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target_prefix(), strerror(error));
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exit(1);
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}
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errno = error;
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return (error);
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#else
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printf("target_chdir (%s)\n", tgt_dir);
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return (0);
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#endif
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}
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void
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target_chdir_or_die(const char *dir)
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{
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(void)do_target_chdir(dir, 1);
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}
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#ifdef notdef
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int
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target_chdir(const char *dir)
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{
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return do_target_chdir(dir, 0);
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}
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#endif
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/*
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* Copy a file from the current root into the target system,
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* where the destination pathname is relative to the target root.
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* Does not check for copy-to-self when target is current root.
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*/
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int
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cp_to_target(const char *srcpath, const char *tgt_path)
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{
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const char *real_path = target_expand(tgt_path);
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return run_program(0, "/bin/cp %s %s", srcpath, real_path);
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}
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/*
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* Duplicate a file from the current root to the same pathname
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* in the target system. Pathname must be an absolute pathname.
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* If we're running in the target, do nothing.
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*/
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void
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dup_file_into_target(const char *filename)
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{
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if (!target_already_root())
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cp_to_target(filename, filename);
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}
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/*
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* Do a mv where both pathnames are within the target filesystem.
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*/
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void
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mv_within_target_or_die(const char *frompath, const char *topath)
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{
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char realfrom[STRSIZE];
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char realto[STRSIZE];
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strlcpy(realfrom, target_expand(frompath), sizeof realfrom);
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strlcpy(realto, target_expand(topath), sizeof realto);
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run_program(RUN_FATAL, "mv %s %s", realfrom, realto);
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}
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/* Do a cp where both pathnames are within the target filesystem. */
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int
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cp_within_target(const char *frompath, const char *topath, int optional)
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{
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char realfrom[STRSIZE];
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char realto[STRSIZE];
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strncpy(realfrom, target_expand(frompath), STRSIZE);
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strncpy(realto, target_expand(topath), STRSIZE);
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if (access(realfrom, R_OK) == -1 && optional)
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return 0;
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return (run_program(0, "cp -p %s %s", realfrom, realto));
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}
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/* fopen a pathname in the target. */
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FILE *
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target_fopen(const char *filename, const char *type)
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{
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return fopen(target_expand(filename), type);
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}
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/*
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* Do a mount onto a mountpoint in the install target.
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* Record mountpoint so we can unmount when finished.
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* NB: does not prefix mount-from, which probably breaks nullfs mounts.
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*/
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int
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target_mount(const char *opts, const char *from, int ptn, const char *on)
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{
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struct unwind_mount *m;
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int error;
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int len;
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len = strlen(on);
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m = malloc(sizeof *m + len);
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if (m == 0)
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return (ENOMEM); /* XXX */
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memcpy(m->um_mountpoint, on, len + 1);
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#ifdef DEBUG_UNWIND
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endwin();
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fprintf(stderr, "mounting %s with unwind\n", on);
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backtowin();
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#endif
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error = run_program(0, "/sbin/mount %s /dev/%s%c %s%s",
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opts, from, 'a' + ptn, target_prefix(), on);
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if (error) {
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free(m);
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return error;
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}
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m->um_prev = unwind_mountlist;
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unwind_mountlist = m;
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return 0;
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}
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/*
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* unwind the mount stack, unmounting mounted filesystems.
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* For now, ignore any errors in unmount.
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* (Why would we be unable to unmount? The user has suspended
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* us and forked shell sitting somewhere in the target root?)
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*/
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void
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unwind_mounts(void)
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{
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struct unwind_mount *m;
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volatile static int unwind_in_progress = 0;
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/* signal safety */
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if (unwind_in_progress)
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return;
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unwind_in_progress = 1;
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while ((m = unwind_mountlist) != NULL) {
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unwind_mountlist = m->um_prev;
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#ifdef DEBUG_UNWIND
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endwin();
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fprintf(stderr, "unmounting %s\n", m->um_mountpoint);
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backtowin();
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#endif
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run_program(0, "/sbin/umount %s%s",
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target_prefix(), m->um_mountpoint);
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free(m);
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}
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unwind_in_progress = 0;
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}
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int
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target_collect_file(int kind, char **buffer, const char *name)
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{
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const char *realname = target_expand(name);
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#ifdef DEBUG
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printf("collect real name %s\n", realname);
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#endif
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return collect(kind, buffer, realname);
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}
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/*
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* Verify a pathname already exists in the target root filesystem,
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* by running test "testflag" on the expanded target pathname.
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*/
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int
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target_test(unsigned int mode, const char *path)
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{
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const char *real_path = target_expand(path);
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register int result;
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result = !file_mode_match(real_path, mode);
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scripting_fprintf(NULL, "if [ $? != 0 ]; then echo \"%s does not exist!\"; fi\n", real_path);
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#if defined(DEBUG)
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printf("target_test(%s %s) returning %d\n", test, real_path, result);
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#endif
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return (result);
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}
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/*
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* Verify a directory already exists in the target root
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* filesystem. Do not create the directory if it doesn't exist.
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* Assumes that sysinst has already mounted the target root.
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*/
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int
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target_test_dir(const char *path)
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{
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return target_test(S_IFDIR, path);
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}
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/*
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* Verify an ordinary file already exists in the target root
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* filesystem. Do not create the directory if it doesn't exist.
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* Assumes that sysinst has already mounted the target root.
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*/
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int
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target_test_file(const char *path)
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{
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return target_test(S_IFREG, path);
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}
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int
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target_test_symlink(const char *path)
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{
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return target_test(S_IFLNK, path);
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}
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int
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target_file_exists_p(const char *path)
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{
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return (target_test_file(path) == 0);
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}
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int
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target_dir_exists_p(const char *path)
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{
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return (target_test_dir(path) == 0);
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}
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int
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target_symlink_exists_p(const char *path)
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{
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return (target_test_symlink(path) == 0);
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}
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/*
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* XXXX had to include this to deal with symlinks in some places.
|
|
* When the target * disk is mounted under /targetroot, absolute symlinks
|
|
* on it don't work right.
|
|
* This function will resolve them using the mountpoint as prefix.
|
|
* Copied verbatim from libc, with added prefix handling.
|
|
*
|
|
* char *realpath(const char *path, char resolved_path[MAXPATHLEN]);
|
|
*
|
|
* Find the real name of path, by removing all ".", ".." and symlink
|
|
* components. Returns (resolved) on success, or (NULL) on failure,
|
|
* in which case the path which caused trouble is left in (resolved).
|
|
*/
|
|
char *
|
|
target_realpath(const char *path, char *resolved)
|
|
{
|
|
struct stat sb;
|
|
int fd, n, rootd, serrno, nlnk = 0;
|
|
char *p, *q, wbuf[MAXPATHLEN];
|
|
char solidus[2], empty[1];
|
|
solidus[0] = '/';
|
|
solidus[1] = '\0';
|
|
empty[0] = '\0';
|
|
|
|
/* Save the starting point. */
|
|
if ((fd = open(".", O_RDONLY)) < 0) {
|
|
(void)strlcpy(resolved, ".", MAXPATHLEN);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Find the dirname and basename from the path to be resolved.
|
|
* Change directory to the dirname component.
|
|
* lstat the basename part.
|
|
* if it is a symlink, read in the value and loop.
|
|
* if it is a directory, then change to that directory.
|
|
* get the current directory name and append the basename.
|
|
*/
|
|
if (target_prefix() != NULL && strcmp(target_prefix(), "") != 0)
|
|
snprintf(resolved, MAXPATHLEN, "%s/%s", target_prefix(), path);
|
|
else
|
|
if (strlcpy(resolved, path, MAXPATHLEN) >= MAXPATHLEN) {
|
|
errno = ENAMETOOLONG;
|
|
goto err1;
|
|
}
|
|
loop:
|
|
q = strrchr(resolved, '/');
|
|
if (q != NULL) {
|
|
p = q + 1;
|
|
if (q == resolved)
|
|
q = solidus;
|
|
else {
|
|
do {
|
|
--q;
|
|
} while (q > resolved && *q == '/');
|
|
q[1] = '\0';
|
|
q = resolved;
|
|
}
|
|
if (chdir(q) < 0)
|
|
goto err1;
|
|
} else
|
|
p = resolved;
|
|
|
|
/* Deal with the last component. */
|
|
if (lstat(p, &sb) == 0) {
|
|
if (S_ISLNK(sb.st_mode)) {
|
|
if (nlnk++ >= MAXSYMLINKS) {
|
|
errno = ELOOP;
|
|
goto err1;
|
|
}
|
|
n = readlink(p, wbuf, MAXPATHLEN - 1);
|
|
if (n < 0)
|
|
goto err1;
|
|
wbuf[n] = '\0';
|
|
if (wbuf[0] == '/')
|
|
snprintf(resolved, MAXPATHLEN, "%s%s",
|
|
target_prefix(), wbuf);
|
|
else
|
|
strlcpy(resolved, wbuf, MAXPATHLEN);
|
|
goto loop;
|
|
}
|
|
if (S_ISDIR(sb.st_mode)) {
|
|
if (chdir(p) < 0)
|
|
goto err1;
|
|
p = empty;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Save the last component name and get the full pathname of
|
|
* the current directory.
|
|
*/
|
|
if (strlcpy(wbuf, p, sizeof(wbuf)) >= sizeof(wbuf)) {
|
|
errno = ENAMETOOLONG;
|
|
goto err1;
|
|
}
|
|
|
|
/*
|
|
* Call the internal internal version of getcwd which
|
|
* does a physical search rather than using the $PWD short-cut
|
|
*/
|
|
if (getcwd(resolved, MAXPATHLEN) == 0)
|
|
goto err1;
|
|
|
|
/*
|
|
* Join the two strings together, ensuring that the right thing
|
|
* happens if the last component is empty, or the dirname is root.
|
|
*/
|
|
if (resolved[0] == '/' && resolved[1] == '\0')
|
|
rootd = 1;
|
|
else
|
|
rootd = 0;
|
|
|
|
if (*wbuf) {
|
|
if (strlen(resolved) + strlen(wbuf) + (rootd ? 0 : 1) + 1 >
|
|
MAXPATHLEN) {
|
|
errno = ENAMETOOLONG;
|
|
goto err1;
|
|
}
|
|
if (rootd == 0)
|
|
if (strlcat(resolved, "/", MAXPATHLEN) >= MAXPATHLEN) {
|
|
errno = ENAMETOOLONG;
|
|
goto err1;
|
|
}
|
|
if (strlcat(resolved, wbuf, MAXPATHLEN) >= MAXPATHLEN) {
|
|
errno = ENAMETOOLONG;
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
/* Go back to where we came from. */
|
|
if (fchdir(fd) < 0) {
|
|
serrno = errno;
|
|
goto err2;
|
|
}
|
|
|
|
/* It's okay if the close fails, what's an fd more or less? */
|
|
(void)close(fd);
|
|
return (resolved);
|
|
|
|
err1: serrno = errno;
|
|
(void)fchdir(fd);
|
|
err2: (void)close(fd);
|
|
errno = serrno;
|
|
return (NULL);
|
|
}
|