--- /dev/null
+// $Id: vunify.c,v 1.15 2005/03/24 12:44:17 ensc Exp $ --*- c -*--
+
+// Copyright (C) 2003,2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//
+// 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; version 2 of the License.
+//
+// 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.
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "vunify.h"
+#include "util.h"
+
+#include "lib_internal/unify.h"
+#include "lib_internal/matchlist.h"
+#include "lib_internal/util-dotfile.h"
+#include "lib_internal/util-safechdir.h"
+#include <lib/vserver.h>
+
+#include <getopt.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <wait.h>
+#include <fcntl.h>
+#include <assert.h>
+
+#define ENSC_WRAPPERS_IO 1
+#define ENSC_WRAPPERS_FCNTL 1
+#define ENSC_WRAPPERS_DIRENT 1
+#define ENSC_WRAPPERS_UNISTD 1
+#define ENSC_WRAPPERS_STDLIB 1
+#include <wrappers.h>
+
+int wrapper_exit_code = 1;
+
+
+#define CMD_HELP 0x8000
+#define CMD_VERSION 0x8001
+#define CMD_MANUALLY 0x8002
+
+struct option const
+CMDLINE_OPTIONS[] = {
+ { "help", no_argument, 0, CMD_HELP },
+ { "version", no_argument, 0, CMD_VERSION },
+ { "manually", no_argument, 0, CMD_MANUALLY },
+ { 0,0,0,0 }
+};
+
+static struct WalkdownInfo global_info;
+static struct SkipReason skip_reason;
+static struct Arguments const * global_args;
+
+int Global_getVerbosity() {
+ return global_args->verbosity;
+}
+
+bool Global_doRenew() {
+ return global_args->do_renew;
+}
+
+static void
+showHelp(int fd, char const *cmd, int res)
+{
+ WRITE_MSG(fd, "Usage:\n ");
+ WRITE_STR(fd, cmd);
+ WRITE_MSG(fd,
+ " [-Rnv] <vserver>\n or\n ");
+ WRITE_STR(fd, cmd);
+ WRITE_MSG(fd,
+ " --manually [-Rnvx] [--] <path> <excludelist> [<path> <excludelist>]+\n\n"
+ " --manually ... unify generic paths; excludelists must be generated\n"
+ " manually\n"
+ " -R ... revert operation; deunify files\n"
+ " -n ... do not modify anything; just show what there will be\n"
+ " done (in combination with '-v')\n"
+ " -v ... verbose mode\n"
+ " -x ... do not cross filesystems; this is valid in manual\n"
+ " mode only and will be ignored for vserver unification\n\n"
+ "Please report bugs to " PACKAGE_BUGREPORT "\n");
+#if 0
+ " -C ... use cached excludelists; usually they will be\n"
+ " regenerated after package installation to reflect e.g.\n"
+ " added/removed configuration files\n\n"
+#endif
+ exit(res);
+}
+
+static void
+showVersion()
+{
+ WRITE_MSG(1,
+ "vunify " VERSION " -- unifies vservers and/or directories\n"
+ "This program is part of " PACKAGE_STRING "\n\n"
+ "Copyright (C) 2003,2004 Enrico Scholz\n"
+ VERSION_COPYRIGHT_DISCLAIMER);
+ exit(0);
+}
+
+// Returns 'false' iff one of the files is not existing, or of the files are different/not unifyable
+static bool
+checkFstat(struct MatchList const * const mlist,
+ PathInfo const * const basename,
+ PathInfo const * const path,
+ struct stat const ** const dst_fstat, struct stat * const dst_fstat_buf,
+ struct stat * const src_fstat)
+{
+ assert(basename->d[0] != '/');
+
+ if (*dst_fstat==0) {
+ // local file does not exist... strange
+ // TODO: message
+ skip_reason.r = rsFSTAT;
+ if (lstat(basename->d, dst_fstat_buf)==-1) return false;
+ *dst_fstat = dst_fstat_buf;
+ }
+
+ assert(*dst_fstat!=0);
+
+
+ PathInfo src_path = mlist->root;
+ char src_path_buf[ENSC_PI_APPSZ(src_path, *path)];
+
+ PathInfo_append(&src_path, path, src_path_buf);
+
+ // source file does not exist
+ skip_reason.r = rsNOEXISTS;
+ if (lstat(src_path.d, src_fstat)==-1) return false;
+
+ // these are directories; this succeeds everytime
+ if (S_ISDIR((*dst_fstat)->st_mode) && S_ISDIR(src_fstat->st_mode)) return true;
+
+ // both files are different, so return false
+ skip_reason.r = rsDIFFERENT;
+ if ((!global_args->do_revert && !Unify_isUnifyable(*dst_fstat, src_fstat)) ||
+ ( global_args->do_revert && !Unify_isUnified (*dst_fstat, src_fstat)))
+ return false;
+
+ // these are the same files
+ return true;
+}
+
+static struct MatchList const *
+checkDirEntry(PathInfo const *path,
+ PathInfo const *d_path, bool *is_dir,
+ struct stat *src_stat, struct stat *dst_stat)
+{
+ struct WalkdownInfo const * const info = &global_info;
+ struct MatchList const * mlist;
+ struct stat const * cache_stat;
+
+ // Check if it is in the exclude/include list of the destination vserver and
+ // abort when it is not matching an allowed entry
+ skip_reason.r = rsEXCL_DST;
+ skip_reason.d.list = &info->dst_list;
+ if (MatchList_compare(&info->dst_list, path->d)!=stINCLUDE) return 0;
+
+ // Now, go through the reference vservers and do the lightweigt list-check
+ // first and compare then the fstat's.
+ for (mlist=info->src_lists.v; mlist<info->src_lists.v+info->src_lists.l; ++mlist) {
+ cache_stat = 0;
+ skip_reason.r = rsEXCL_SRC;
+ skip_reason.d.list = mlist;
+ if (MatchList_compare(mlist, path->d)==stINCLUDE &&
+ checkFstat(mlist, d_path, path, &cache_stat, dst_stat, src_stat)) {
+
+ // Failed the check or is it a symlink which can not be handled
+ if (cache_stat==0) return 0;
+
+ skip_reason.r = rsSYMLINK;
+ if (S_ISLNK(dst_stat->st_mode)) return 0;
+
+ skip_reason.r = rsSPECIAL;
+ if (!S_ISREG(dst_stat->st_mode) &&
+ !S_ISDIR(dst_stat->st_mode)) return 0;
+
+ *is_dir = S_ISDIR(dst_stat->st_mode);
+ return mlist;
+ }
+ else if (cache_stat!=0 && !global_args->do_revert &&
+ skip_reason.r == rsDIFFERENT &&
+ Unify_isUnified(cache_stat, src_stat)) {
+ skip_reason.r = rsUNIFIED;
+ skip_reason.d.list = mlist;
+ return 0;
+ }
+ }
+
+ // No luck...
+ return 0;
+}
+
+static bool
+updateSkipDepth(PathInfo const *path, bool walk_down)
+{
+ struct WalkdownInfo const * const info = &global_info;
+ struct MatchList * mlist;
+ bool result = false;
+
+ for (mlist=info->src_lists.v; mlist<info->src_lists.v+info->src_lists.l; ++mlist) {
+ // The easy way... this path is being skipped already
+ if (mlist->skip_depth>0) {
+ if (walk_down) ++mlist->skip_depth;
+ else --mlist->skip_depth;
+ continue;
+ }
+ else if (walk_down) {
+ PathInfo src_path = mlist->root;
+ char src_path_buf[ENSC_PI_APPSZ(src_path, *path)];
+ struct stat src_fstat;
+
+ PathInfo_append(&src_path, path, src_path_buf);
+
+ // when the file/dir exist, we have do go deeper.
+ // else skip it in deeper runs for *this* matchlist
+ if (lstat(src_path.d, &src_fstat)!=-1) result = true;
+ else ++mlist->skip_depth;
+ }
+ else {
+ // TODO: warning
+ }
+ }
+
+ return result;
+}
+
+static bool
+doit(struct MatchList const *mlist,
+ PathInfo const *src_path, struct stat const *src_stat,
+ char const *dst_path, struct stat const UNUSED *dst_stat)
+{
+ PathInfo path = mlist->root;
+ char path_buf[ENSC_PI_APPSZ(path, *src_path)];
+
+ if (global_args->do_dry_run || Global_getVerbosity()>=2) {
+ if (global_args->do_revert) WRITE_MSG(1, "deunifying '");
+ else WRITE_MSG(1, "unifying '");
+
+ Vwrite(1, src_path->d, src_path->l);
+ WRITE_MSG(1, "'");
+
+ if (Global_getVerbosity()>=4) {
+ WRITE_MSG(1, " (from ");
+ if (Global_getVerbosity()==4 && mlist->id.d)
+ Vwrite(1, mlist->id.d, mlist->id.l);
+ else
+ Vwrite(1, mlist->root.d, mlist->root.l);
+ WRITE_MSG(1, ")");
+ }
+ WRITE_MSG(1, "\n");
+ }
+
+ PathInfo_append(&path, src_path, path_buf);
+ return (global_args->do_dry_run ||
+ (!global_args->do_revert && Unify_unify (path.d, src_stat, dst_path, false)) ||
+ ( global_args->do_revert && Unify_deUnify(dst_path)));
+}
+
+
+static void
+printSkipReason()
+{
+ WRITE_MSG(1, " (");
+ switch (skip_reason.r) {
+ case rsDOTFILE : WRITE_MSG(1, "dotfile"); break;
+ case rsEXCL_DST :
+ case rsEXCL_SRC :
+ WRITE_MSG(1, "excluded by ");
+ MatchList_printId(skip_reason.d.list, 1);
+ break;
+ case rsFSTAT : WRITE_MSG(1, "fstat error"); break;
+ case rsNOEXISTS : WRITE_MSG(1, "does not exist in refserver(s)"); break;
+ case rsSYMLINK : WRITE_MSG(1, "symlink"); break;
+ case rsSPECIAL : WRITE_MSG(1, "non regular file"); break;
+ case rsUNIFIED : WRITE_MSG(1, "already unified"); break;
+ case rsDIFFERENT : WRITE_MSG(1, "different"); break;
+ default : assert(false); abort();
+ }
+ WRITE_MSG(1, ")");
+}
+
+#include "vserver-visitdir.hc"
+
+static uint64_t
+visitDirEntry(struct dirent const *ent)
+{
+ bool is_dir;
+ struct MatchList const * match;
+ struct stat f_stat = { .st_dev = 0 };
+ char const * dirname = ent->d_name;
+ PathInfo path = global_info.state;
+ PathInfo d_path = {
+ .d = dirname,
+ .l = strlen(dirname)
+ };
+ char path_buf[ENSC_PI_APPSZ(path, d_path)];
+ bool is_dotfile;
+ struct stat src_stat;
+ uint64_t res = 1;
+
+ PathInfo_append(&path, &d_path, path_buf);
+
+ is_dotfile = isDotfile(dirname);
+ skip_reason.r = rsDOTFILE;
+
+ if (is_dotfile ||
+ (match=checkDirEntry(&path, &d_path, &is_dir, &src_stat, &f_stat))==0) {
+ bool is_link = is_dotfile ? false : S_ISLNK(f_stat.st_mode);
+
+ if (Global_getVerbosity()>=1 &&
+ (Global_getVerbosity()>=3 || skip_reason.r!=rsUNIFIED) &&
+ ((!is_dotfile && !is_link) ||
+ (Global_getVerbosity()>=6 && is_dotfile) ||
+ (Global_getVerbosity()>=6 && is_link)) ) {
+ WRITE_MSG(1, " skipping '");
+ Vwrite(1, path.d, path.l);
+ WRITE_MSG(1, "'");
+ if (Global_getVerbosity()>=2) printSkipReason();
+ WRITE_MSG(1, "\n");
+ }
+ return 0;
+ }
+
+ if (is_dir) {
+ if (updateSkipDepth(&path, true)) {
+ res = visitDir(dirname, &f_stat);
+ updateSkipDepth(&path, false);
+ }
+ else
+ res = 0;
+ }
+ else if (!doit(match, &path, &src_stat, dirname, &f_stat)) {
+ // TODO: message
+ }
+ else
+ res = 0;
+
+ return res;
+}
+
+#include "vunify-init.hc"
+
+int main(int argc, char *argv[])
+{
+ struct Arguments args = {
+ .mode = mdVSERVER,
+ .do_revert = false,
+ .do_dry_run = false,
+ .verbosity = 0,
+ .local_fs = false,
+ .do_renew = true,
+ };
+
+ global_args = &args;
+ while (1) {
+ int c = getopt_long(argc, argv, "Rnvcx",
+ CMDLINE_OPTIONS, 0);
+ if (c==-1) break;
+
+ switch (c) {
+ case CMD_HELP : showHelp(1, argv[0], 0);
+ case CMD_VERSION : showVersion();
+ case CMD_MANUALLY : args.mode = mdMANUALLY; break;
+ case 'R' : args.do_revert = true; break;
+ case 'n' : args.do_dry_run = true; break;
+ case 'x' : args.local_fs = true; break;
+ //case 'C' : args.do_renew = false; break;
+ case 'v' : ++args.verbosity; break;
+ default :
+ WRITE_MSG(2, "Try '");
+ WRITE_STR(2, argv[0]);
+ WRITE_MSG(2, " --help\" for more information.\n");
+ return EXIT_FAILURE;
+ break;
+ }
+ }
+
+ if (argc==optind) {
+ WRITE_MSG(2, "No directory/vserver given\n");
+ return EXIT_FAILURE;
+ }
+
+ switch (args.mode) {
+ case mdMANUALLY : initModeManually(&args, argc-optind, argv+optind); break;
+ case mdVSERVER : initModeVserver (&args, argc-optind, argv+optind); break;
+ default : assert(false); return EXIT_FAILURE;
+ }
+
+ global_info.state.d = "";
+ global_info.state.l = 0;
+
+
+ if (Global_getVerbosity()>=1) WRITE_MSG(1, "Starting to traverse directories...\n");
+ Echdir(global_info.dst_list.root.d);
+ visitDir("/", 0);
+
+#ifndef NDEBUG
+ {
+ size_t i;
+ MatchList_destroy(&global_info.dst_list);
+ for (i=0; i<global_info.src_lists.l; ++i)
+ MatchList_destroy(global_info.src_lists.v+i);
+
+ free(global_info.src_lists.v);
+ }
+#endif
+}
git://git.onelab.eu / util-vserver.git / blobdiff