/* * AppleTalk VFS module for Samba-3.x * * Copyright (C) Alexei Kotovich, 2002 * * 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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "config.h" #include <stdio.h> #include <sys/stat.h> #ifdef HAVE_UTIME_H #include <utime.h> #endif #ifdef HAVE_DIRENT_H #include <dirent.h> #endif #ifdef HAVE_FCNTL_H #include <fcntl.h> #endif #include <errno.h> #include <string.h> #include <includes.h> #include <vfs.h> #define APPLEDOUBLE ".AppleDouble" #define ADOUBLEMODE 0777 /* atalk functions */ static int atalk_build_paths(TALLOC_CTX *ctx, const char *path, const char *fname, char **adbl_path, char **orig_path, SMB_STRUCT_STAT *adbl_info, SMB_STRUCT_STAT *orig_info); static int atalk_unlink_file(const char *path); static struct vfs_ops default_vfs_ops; /* For passthrough operation */ static struct smb_vfs_handle_struct *atalk_handle; static int atalk_get_path_ptr(char *path) { int i = 0; int ptr = 0; for (i = 0; path[i]; i ++) { if (path[i] == '/') ptr = i; /* get out some 'spam';) from win32's file name */ else if (path[i] == ':') { path[i] = '\0'; break; } } return ptr; } static int atalk_build_paths(TALLOC_CTX *ctx, const char *path, const char *fname, char **adbl_path, char **orig_path, SMB_STRUCT_STAT *adbl_info, SMB_STRUCT_STAT *orig_info) { int ptr0 = 0; int ptr1 = 0; char *dname = 0; char *name = 0; if (!ctx || !path || !fname || !adbl_path || !orig_path || !adbl_info || !orig_info) return -1; #if 0 DEBUG(3, ("ATALK: PATH: %s[%s]\n", path, fname)); #endif if (strstr(path, APPLEDOUBLE) || strstr(fname, APPLEDOUBLE)) { DEBUG(3, ("ATALK: path %s[%s] already contains %s\n", path, fname, APPLEDOUBLE)); return -1; } if (fname[0] == '.') ptr0 ++; if (fname[1] == '/') ptr0 ++; *orig_path = talloc_asprintf(ctx, "%s/%s", path, &fname[ptr0]); /* get pointer to last '/' */ ptr1 = atalk_get_path_ptr(*orig_path); sys_lstat(*orig_path, orig_info); if (S_ISDIR(orig_info->st_mode)) { *adbl_path = talloc_asprintf(ctx, "%s/%s/%s/", path, &fname[ptr0], APPLEDOUBLE); } else { dname = talloc_strdup(ctx, *orig_path); dname[ptr1] = '\0'; name = *orig_path; *adbl_path = talloc_asprintf(ctx, "%s/%s/%s", dname, APPLEDOUBLE, &name[ptr1 + 1]); } #if 0 DEBUG(3, ("ATALK: DEBUG:\n%s\n%s\n", *orig_path, *adbl_path)); #endif sys_lstat(*adbl_path, adbl_info); return 0; } static int atalk_unlink_file(const char *path) { int ret = 0; become_root(); ret = unlink(path); unbecome_root(); return ret; } static void atalk_add_to_list(name_compare_entry **list) { int i, count = 0; name_compare_entry *new_list = 0; name_compare_entry *cur_list = 0; cur_list = *list; if (cur_list) { for (i = 0, count = 0; cur_list[i].name; i ++, count ++) { if (strstr(cur_list[i].name, APPLEDOUBLE)) return; } } if (!(new_list = calloc(1, (count == 0 ? 1 : count + 1) * sizeof(name_compare_entry)))) return; for (i = 0; i < count; i ++) { new_list[i].name = strdup(cur_list[i].name); new_list[i].is_wild = cur_list[i].is_wild; } new_list[i].name = strdup(APPLEDOUBLE); new_list[i].is_wild = False; free_namearray(*list); *list = new_list; new_list = 0; cur_list = 0; } static void atalk_rrmdir(TALLOC_CTX *ctx, char *path) { char *dpath; struct dirent *dent = 0; DIR *dir; if (!path) return; dir = opendir(path); if (!dir) return; while (NULL != (dent = readdir(dir))) { if (strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0) continue; if (!(dpath = talloc_asprintf(ctx, "%s/%s", path, dent->d_name))) continue; atalk_unlink_file(dpath); } closedir(dir); } /* Disk operations */ /* Directory operations */ DIR *atalk_opendir(struct tcon_context *conn, const char *fname) { DIR *ret = 0; ret = default_vfs_ops.opendir(conn, fname); /* * when we try to perform delete operation upon file which has fork * in ./.AppleDouble and this directory wasn't hidden by Samba, * MS Windows explorer causes the error: "Cannot find the specified file" * There is some workaround to avoid this situation, i.e. if * connection has not .AppleDouble entry in either veto or hide * list then it would be nice to add one. */ atalk_add_to_list(&conn->hide_list); atalk_add_to_list(&conn->veto_list); return ret; } static int atalk_rmdir(struct tcon_context *conn, const char *path) { BOOL add = False; TALLOC_CTX *ctx = 0; char *dpath; if (!conn || !conn->origpath || !path) goto exit_rmdir; /* due to there is no way to change bDeleteVetoFiles variable * from this module, gotta use talloc stuff.. */ strstr(path, APPLEDOUBLE) ? (add = False) : (add = True); if (!(ctx = talloc_init("remove_directory"))) goto exit_rmdir; if (!(dpath = talloc_asprintf(ctx, "%s/%s%s", conn->origpath, path, add ? "/"APPLEDOUBLE : ""))) goto exit_rmdir; atalk_rrmdir(ctx, dpath); exit_rmdir: talloc_destroy(ctx); return default_vfs_ops.rmdir(conn, path); } /* File operations */ static int atalk_rename(struct tcon_context *conn, const char *old, const char *new) { int ret = 0; char *adbl_path = 0; char *orig_path = 0; SMB_STRUCT_STAT adbl_info; SMB_STRUCT_STAT orig_info; TALLOC_CTX *ctx; ret = default_vfs_ops.rename(conn, old, new); if (!conn || !old) return ret; if (!(ctx = talloc_init("rename_file"))) return ret; if (atalk_build_paths(ctx, conn->origpath, old, &adbl_path, &orig_path, &adbl_info, &orig_info) != 0) return ret; if (S_ISDIR(orig_info.st_mode) || S_ISREG(orig_info.st_mode)) { DEBUG(3, ("ATALK: %s has passed..\n", adbl_path)); goto exit_rename; } atalk_unlink_file(adbl_path); exit_rename: talloc_destroy(ctx); return ret; } static int atalk_unlink(struct tcon_context *conn, const char *path) { int ret = 0, i; char *adbl_path = 0; char *orig_path = 0; SMB_STRUCT_STAT adbl_info; SMB_STRUCT_STAT orig_info; TALLOC_CTX *ctx; ret = default_vfs_ops.unlink(conn, path); if (!conn || !path) return ret; /* no .AppleDouble sync if veto or hide list is empty, * otherwise "Cannot find the specified file" error will be caused */ if (!conn->veto_list) return ret; if (!conn->hide_list) return ret; for (i = 0; conn->veto_list[i].name; i ++) { if (strstr(conn->veto_list[i].name, APPLEDOUBLE)) break; } if (!conn->veto_list[i].name) { for (i = 0; conn->hide_list[i].name; i ++) { if (strstr(conn->hide_list[i].name, APPLEDOUBLE)) break; else { DEBUG(3, ("ATALK: %s is not hidden, skipped..\n", APPLEDOUBLE)); return ret; } } } if (!(ctx = talloc_init("unlink_file"))) return ret; if (atalk_build_paths(ctx, conn->origpath, path, &adbl_path, &orig_path, &adbl_info, &orig_info) != 0) return ret; if (S_ISDIR(orig_info.st_mode) || S_ISREG(orig_info.st_mode)) { DEBUG(3, ("ATALK: %s has passed..\n", adbl_path)); goto exit_unlink; } atalk_unlink_file(adbl_path); exit_unlink: talloc_destroy(ctx); return ret; } static int atalk_chmod(struct tcon_context *conn, const char *path, mode_t mode) { int ret = 0; char *adbl_path = 0; char *orig_path = 0; SMB_STRUCT_STAT adbl_info; SMB_STRUCT_STAT orig_info; TALLOC_CTX *ctx; ret = default_vfs_ops.chmod(conn, path, mode); if (!conn || !path) return ret; if (!(ctx = talloc_init("chmod_file"))) return ret; if (atalk_build_paths(ctx, conn->origpath, path, &adbl_path, &orig_path, &adbl_info, &orig_info) != 0) return ret; if (!S_ISDIR(orig_info.st_mode) && !S_ISREG(orig_info.st_mode)) { DEBUG(3, ("ATALK: %s has passed..\n", orig_path)); goto exit_chmod; } chmod(adbl_path, ADOUBLEMODE); exit_chmod: talloc_destroy(ctx); return ret; } static int atalk_chown(struct tcon_context *conn, const char *path, uid_t uid, gid_t gid) { int ret = 0; char *adbl_path = 0; char *orig_path = 0; SMB_STRUCT_STAT adbl_info; SMB_STRUCT_STAT orig_info; TALLOC_CTX *ctx; ret = default_vfs_ops.chown(conn, path, uid, gid); if (!conn || !path) return ret; if (!(ctx = talloc_init("chown_file"))) return ret; if (atalk_build_paths(ctx, conn->origpath, path, &adbl_path, &orig_path, &adbl_info, &orig_info) != 0) return ret; if (!S_ISDIR(orig_info.st_mode) && !S_ISREG(orig_info.st_mode)) { DEBUG(3, ("ATALK: %s has passed..\n", orig_path)); goto exit_chown; } chown(adbl_path, uid, gid); exit_chown: talloc_destroy(ctx); return ret; } static vfs_op_tuple atalk_ops[] = { /* Directory operations */ {atalk_opendir, SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_TRANSPARENT}, {atalk_rmdir, SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT}, /* File operations */ {atalk_rename, SMB_VFS_OP_RENAME, SMB_VFS_LAYER_TRANSPARENT}, {atalk_unlink, SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT}, {atalk_chmod, SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_TRANSPARENT}, {atalk_chown, SMB_VFS_OP_CHOWN, SMB_VFS_LAYER_TRANSPARENT}, /* Finish VFS operations definition */ {NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP} }; /* VFS initialisation function. Return vfs_op_tuple array back to SAMBA. */ vfs_op_tuple *vfs_init(int *vfs_version, struct vfs_ops *def_vfs_ops, struct smb_vfs_handle_struct *vfs_handle) { *vfs_version = SMB_VFS_INTERFACE_VERSION; memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops)); atalk_handle = vfs_handle; DEBUG(3, ("ATALK: vfs module loaded\n")); return atalk_ops; } /* VFS finalization function. */ void vfs_done(struct tcon_context *conn) { DEBUG(3, ("ATALK: vfs module unloaded\n")); }