+++ /dev/null
-// $Id: vbuild.cc,v 1.1.4.1 2004/02/09 22:55:00 ensc Exp $
-
-// Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
-// based on vbuild.cc by Jacques Gelinas
-//
-// 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, 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, write to the Free Software
-// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-/*
- This utility is used to build a new vserver using a reference vserver.
- It uses hard link whenever possible instead of duplicating files.
- Once done, it sets the immutable bits.
-*/
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#include <dirent.h>
-
-#include <string>
-#include <vector>
-#include <list>
-#include <set>
-#include "vutil.h"
-
-using namespace std;
-
-struct EXCLDIR{
- string prefix;
- int len;
- EXCLDIR(const char *s)
- {
- prefix = s;
- prefix += '/';
- len = prefix.size();
- }
-};
-static vector<EXCLDIR> excldirs;
-
-
-static int ext2flags = EXT2_IMMUTABLE_FILE_FL | EXT2_IMMUTABLE_LINK_FL;
-static struct {
- int nblink;
- int nbcopy;
- long size_copy;
- int nbdir;
- int nbsymlink;
- int nbspc;
-} stats;
-
-
-static void usage()
-{
- cerr <<
- "vbuild version " << VERSION <<
- "\n\n"
- "vbuild [ options ] reference-server new-vservers\n"
- "\n"
- "--test: Show what will be done, do not do it.\n"
- "--debug: Prints some debugging messages.\n"
- "\n"
- "--excldir: None of the files under a given directory will be copied\n"
- "\tThe directory is expressed in absolute/logical form (relative\n"
- "\tto the vserver root (ex: /var/log)\n"
- "\n"
- "\n"
- "--noflags: Do not put any immutable flags on the file\n"
- "--immutable: Set the immutable_file bit on the files.\n"
- "--immutable-mayunlink: Sets the immutable_link flag on files.\n"
- "--stats: Produce statistics on the number of file linked\n"
- " copied and so on.\n"
- "\n"
- "By default, the immutable_file and immutable_link flags are\n"
- "set on the files. So if you want no immutable flags, you must\n"
- "use --noflags. If you want a single flag, you must use\n"
- "--noflags first, then the --immutable or --immutable-mayunlink\n"
- "flag.\n"
- ;
-}
-
-/*
- Return true if a directory lies inside a directory set
-*/
-static bool vbuild_inside (vector<EXCLDIR> &dirs, const char *path)
-{
- bool found = false;
- for (unsigned i=0; i<dirs.size(); i++){
- if (strncmp(dirs[i].prefix.c_str(),path,dirs[i].len)==0){
- found = true;
- break;
- }
- }
- return found;
-}
-
-
-
-static int vbuild_copy (
- string refserv,
- string newserv,
- dev_t dev, // We stay on the same volume
- string logical_dir,
- set<string> &files)
-{
- int ret = -1;
- if (debug > 0) printf ("Copying directory %s\n",logical_dir.c_str());
- DIR *dir = opendir (refserv.c_str());
- if (dir == NULL){
- fprintf (stderr,"Can't open directory %s (%s)\n",refserv.c_str()
- ,strerror(errno));
- }else{
- logical_dir += "/";
- bool copy_files = !vbuild_inside(excldirs,logical_dir.c_str());
- struct dirent *ent;
- ret = 0;
- while (ret == 0 && (ent=readdir(dir))!=NULL){
- if (strcmp(ent->d_name,".")==0 || strcmp(ent->d_name,"..")==0){
- continue;
- }
- string file = refserv + "/" + ent->d_name;
- struct stat st;
- if (vutil_lstat(file.c_str(),st) == -1){
- ret = -1;
- }else if (st.st_dev != dev){
- if (debug > 0) printf ("Ignore sub-directory %s\n",file.c_str());
- }else{
- string newfile = newserv + "/" + ent->d_name;
- if (S_ISDIR(st.st_mode)){
- if (vbuild_mkdir (newfile.c_str(),st.st_mode)==-1){
- fprintf (stderr,"Can't mkdir %s (%s)\n"
- ,newfile.c_str(),strerror(errno));
- ret = -1;
- }else{
- stats.nbdir++;
- if (vbuild_chown(newfile.c_str(),st.st_uid,st.st_gid)==-1){
- fprintf (stderr,"Can't chown %s (%s)\n"
- ,newfile.c_str(),strerror(errno));
- ret = -1;
- }
- ret |= vbuild_copy (file,newfile,dev
- ,logical_dir + ent->d_name,files);
- }
- }else if (S_ISLNK(st.st_mode)){
- char path[PATH_MAX];
- int len = readlink(file.c_str(),path,sizeof(path)-1);
- if (len < 0){
- fprintf (stderr,"Can't readlink %s (%s)\n"
- ,file.c_str(),strerror(errno));
- ret = -1;
- }else{
- path[len] = '\0';
- stats.nbsymlink++;
- if (vbuild_symlink (path,newfile.c_str())==-1){
- fprintf (stderr,"Can't symlink %s to %s (%s)\n",
- newfile.c_str(),path,strerror(errno));
- }
- }
- }else if (S_ISBLK(st.st_mode)
- || S_ISCHR(st.st_mode)
- || S_ISFIFO(st.st_mode)){
- stats.nbspc++;
- if (vbuild_mknod (newfile.c_str(),st.st_mode,st.st_rdev)==-1){
- fprintf (stderr,"Can't mknod %s (%s)\n"
- ,newfile.c_str(),strerror(errno));
- ret = -1;
- }
- }else if (S_ISSOCK(st.st_mode)){
- // Do nothing
- }else if (copy_files){
- // Ok, this is a file. We either copy it or do a link
- string logical_file = logical_dir + ent->d_name;
- if (files.find (logical_file)==files.end()){
- if (debug > 1) printf ("Copying file %s\n",file.c_str());
- if (vbuild_file_copy (file.c_str(),newfile.c_str(),st)==-1){
- fprintf (stderr,"Can't copy %s to %s (%s)\n",
- file.c_str(),newfile.c_str(),strerror(errno));
- ret = -1;
- }else{
- stats.size_copy += st.st_size;
- stats.nbcopy++;
- }
- }else{
- if (debug > 2) printf ("Linking file %s\n",file.c_str());
- setext2flag (file.c_str(),false,ext2flags);
- stats.nblink++;
- if (vbuild_link (file.c_str(),newfile.c_str())==-1){
- fprintf (stderr,"Can't link %s to %s (%s)\n",
- file.c_str(),newfile.c_str(),strerror(errno));
- ret = -1;
- }
- setext2flag (file.c_str(),true,ext2flags);
- }
- }
- }
- }
- closedir(dir);
- }
- return ret;
-}
-
-int main (int argc, char *argv[])
-{
- int ret = -1;
- bool statistics = false;
- int i;
- for (i=1; i<argc; i++){
- const char *arg = argv[i];
- //const char *opt = argv[i+1];
- if (strcmp(arg,"--test")==0){
- testmode = true;
- }else if (strcmp(arg,"--debug")==0){
- debug++;
- }else if (strcmp(arg,"--stats")==0){
- statistics = true;
- }else if (strcmp(arg,"--noflags")==0){
- ext2flags = 0;
- }else if (strcmp(arg,"--immutable")==0){
- ext2flags |= EXT2_IMMUTABLE_FILE_FL;
- }else if (strcmp(arg,"--immutable-mayunlink")==0){
- ext2flags |= EXT2_IMMUTABLE_LINK_FL;
- }else if (strcmp(arg,"--excldir")==0){
- i++;
- excldirs.push_back (EXCLDIR(argv[i]));
- }else{
- break;
- }
- }
- if (i!=argc-2){
- usage();
- }else{
- string refserv = argv[i++];
- string newserv = argv[i];
- list<PACKAGE> packages;
- // Load the files which are not configuration files from
- // the packages
- vutil_loadallpkg (refserv,packages);
- set<string> files;
- for (list<PACKAGE>::iterator it=packages.begin(); it!=packages.end(); it++){
- (*it).loadfiles(refserv,files);
- }
- // Now, we do a recursive copy of refserv into newserv
- umask (0);
- mkdir (newserv.c_str(),0755);
- setext2flag(newserv.c_str(), false, 0);
- // Check if it is on the same volume
- struct stat refst,newst;
- if (vutil_lstat(refserv,refst)!=-1
- && vutil_lstat(newserv,newst)!=1){
- if (refst.st_dev != newst.st_dev){
- fprintf (stderr,"Can't vbuild %s because it is not on the same volume as %s\n"
- ,newserv.c_str(),refserv.c_str());
- }else{
- stats.nbdir = stats.nblink = stats.nbcopy = stats.nbsymlink = 0;
- stats.nbspc = 0;
- stats.size_copy = 0;
- ret = vbuild_copy (refserv,newserv,refst.st_dev,"",files);
- if (statistics){
- printf ("Directory created: %d\n",stats.nbdir);
- printf ("Files copied : %d\n",stats.nbcopy);
- printf ("Bytes copied : %ld\n",stats.size_copy);
- printf ("Files linked : %d\n",stats.nblink);
- printf ("Files symlinked : %d\n",stats.nbsymlink);
- printf ("Special files : %d\n",stats.nbspc);
- }
- }
- }
- }
- return ret;
-}
-
-
git://git.onelab.eu / util-vserver.git / blobdiff