--- /dev/null
+###############################################################################
+# #
+# IPFire.org - A linux based firewall #
+# Copyright (C) 2007 Michael Tremer & Christian Schmidt #
+# #
+# This program is free software: you can redistribute it and/or modify #
+# it under the terms of the GNU General Public License as published by #
+# the Free Software Foundation, either version 3 of the License, or #
+# (at your option) any later version. #
+# #
+# This program is distributed in the hope that it will be useful, #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
+# GNU General Public License for more details. #
+# #
+# You should have received a copy of the GNU General Public License #
+# along with this program. If not, see <http://www.gnu.org/licenses/>. #
+# #
+###############################################################################
+
+###############################################################################
+# Definitions
+###############################################################################
+
+include Config
+
+VER = 006
+
+THISAPP = dracut-$(VER)
+DL_FILE = $(THISAPP).tar.bz2
+DL_FROM = $(URL_IPFIRE)
+DIR_APP = $(DIR_SRC)/$(THISAPP)
+TARGET = $(DIR_INFO)/$(THISAPP)
+
+###############################################################################
+# Top-level Rules
+###############################################################################
+
+objects = $(DL_FILE)
+
+$(DL_FILE) = $(DL_FROM)/$(DL_FILE)
+
+$(DL_FILE)_MD5 = 016052b57001789ec2acf89d382a82f5
+
+install : $(TARGET)
+
+check : $(patsubst %,$(DIR_CHK)/%,$(objects))
+
+download :$(patsubst %,$(DIR_DL)/%,$(objects))
+
+md5 : $(subst %,%_MD5,$(objects))
+
+###############################################################################
+# Downloading, checking, md5sum
+###############################################################################
+
+$(patsubst %,$(DIR_CHK)/%,$(objects)) :
+ @$(CHECK)
+
+$(patsubst %,$(DIR_DL)/%,$(objects)) :
+ @$(LOAD)
+
+$(subst %,%_MD5,$(objects)) :
+ @$(MD5)
+
+###############################################################################
+# Installation Details
+###############################################################################
+
+$(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
+ @$(PREBUILD)
+ @rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar jxf $(DIR_DL)/$(DL_FILE)
+
+ cd $(DIR_APP) && cp -vf $(DIR_SRC)/src/dracut/switch_root.c .
+
+ cd $(DIR_APP) && make $(MAKETUNING) WITH_SWITCH_ROOT=1
+ cd $(DIR_APP) && make install WITH_SWITCH_ROOT=1 \
+ sysconfdir=/etc
+
+ rm -rf /usr/share/dracut/modules.d/*{dash,fips,redhat-i18n,rpmversion,network,ifcfg,plymouth,btrfs,crypt,dm,dmraid,dmsquash-live,lvm,mdraid,multipath,dasd,fcoe,iscsi,nbd,nfs,resume,uswsusp,zfcp,znet,selinux}
+
+ @rm -rf $(DIR_APP)
+ @$(POSTBUILD)
--- /dev/null
+/*
+ * switchroot.c - switch to new root directory and start init.
+ *
+ * Copyright 2002-2008 Red Hat, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ * Peter Jones <pjones@redhat.com>
+ * Jeremy Katz <katzj@redhat.com>
+ */
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <dirent.h>
+
+#ifndef MS_MOVE
+#define MS_MOVE 8192
+#endif
+
+enum {
+ ok,
+ err_no_directory,
+ err_usage,
+};
+
+/* remove all files/directories below dirName -- don't cross mountpoints */
+static int
+recursiveRemove(char * dirName)
+{
+ struct stat sb,rb;
+ DIR * dir;
+ struct dirent * d;
+ char * strBuf = alloca(strlen(dirName) + 1024);
+
+ if (!(dir = opendir(dirName))) {
+ printf("error opening %s: %m\n", dirName);
+ return 0;
+ }
+
+ if (fstat(dirfd(dir),&rb)) {
+ printf("unable to stat %s: %m\n", dirName);
+ closedir(dir);
+ return 0;
+ }
+
+ errno = 0;
+
+ while ((d = readdir(dir))) {
+ errno = 0;
+
+ if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) {
+ errno = 0;
+ continue;
+ }
+
+ strcpy(strBuf, dirName);
+ strcat(strBuf, "/");
+ strcat(strBuf, d->d_name);
+
+ if (lstat(strBuf, &sb)) {
+ printf("failed to stat %s: %m\n", strBuf);
+ errno = 0;
+ continue;
+ }
+
+ /* only descend into subdirectories if device is same as dir */
+ if (S_ISDIR(sb.st_mode)) {
+ if (sb.st_dev == rb.st_dev) {
+ recursiveRemove(strBuf);
+ if (rmdir(strBuf))
+ printf("failed to rmdir %s: %m\n", strBuf);
+ }
+ errno = 0;
+ continue;
+ }
+ if (unlink(strBuf)) {
+ printf("failed to remove %s: %m\n", strBuf);
+ errno = 0;
+ continue;
+ }
+ }
+
+ if (errno) {
+ closedir(dir);
+ printf("error reading from %s: %m\n", dirName);
+ return 1;
+ }
+
+ closedir(dir);
+ return 0;
+}
+
+static int switchroot(const char *newroot)
+{
+ /* Don't try to unmount the old "/", there's no way to do it. */
+ const char *umounts[] = { "/dev", "/proc", "/sys", NULL };
+ int errnum;
+ int i;
+
+ for (i = 0; umounts[i] != NULL; i++) {
+ char newmount[PATH_MAX];
+ strcpy(newmount, newroot);
+ strcat(newmount, umounts[i]);
+ if (mount(umounts[i], newmount, NULL, MS_MOVE, NULL) < 0) {
+ fprintf(stderr, "Error mount moving old %s %s %m\n",
+ umounts[i], newmount);
+ fprintf(stderr, "Forcing unmount of %s\n", umounts[i]);
+ umount2(umounts[i], MNT_FORCE);
+ }
+ }
+
+ if (chdir(newroot) < 0) {
+ errnum=errno;
+ fprintf(stderr, "switchroot: chdir failed: %m\n");
+ errno=errnum;
+ return -1;
+ }
+ recursiveRemove("/");
+ if (mount(newroot, "/", NULL, MS_MOVE, NULL) < 0) {
+ errnum = errno;
+ fprintf(stderr, "switchroot: mount failed: %m\n");
+ errno = errnum;
+ return -1;
+ }
+
+ if (chroot(".")) {
+ errnum = errno;
+ fprintf(stderr, "switchroot: chroot failed: %m\n");
+ errno = errnum;
+ return -2;
+ }
+ return 1;
+}
+
+static void usage(FILE *output)
+{
+ fprintf(output, "usage: switchroot <newrootdir> <init> <args to init>\n");
+ if (output == stderr)
+ exit(err_usage);
+ exit(ok);
+}
+
+int main(int argc, char *argv[])
+{
+ char *newroot = argv[1];
+ char *init = argv[2];
+ char **initargs = &argv[2];
+
+ if (newroot == NULL || newroot[0] == '\0' ||
+ init == NULL || init[0] == '\0' ) {
+ usage(stderr);
+ }
+
+ if (switchroot(newroot) < 0) {
+ fprintf(stderr, "switchroot has failed. Sorry.\n");
+ return 1;
+ }
+ if (access(initargs[0], X_OK))
+ fprintf(stderr, "WARNING: can't access %s\n", initargs[0]);
+
+ /* get session leader */
+ setsid();
+ /* set controlling terminal */
+ ioctl (0, TIOCSCTTY, 1);
+
+ execv(initargs[0], initargs);
+}
+
projects / people / pmueller / ipfire-2.x.git / commitdiff
