| /* |
| * Server-side file management |
| * |
| * Copyright (C) 1998 Alexandre Julliard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "config.h" |
| #include "wine/port.h" |
| |
| #include <assert.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <sys/stat.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <time.h> |
| #include <unistd.h> |
| #ifdef HAVE_UTIME_H |
| #include <utime.h> |
| #endif |
| #ifdef HAVE_POLL_H |
| #include <poll.h> |
| #endif |
| |
| #include "ntstatus.h" |
| #define WIN32_NO_STATUS |
| #include "windef.h" |
| #include "winternl.h" |
| |
| #include "file.h" |
| #include "handle.h" |
| #include "thread.h" |
| #include "request.h" |
| #include "process.h" |
| #include "security.h" |
| |
| struct file |
| { |
| struct object obj; /* object header */ |
| struct fd *fd; /* file descriptor for this file */ |
| unsigned int access; /* file access (FILE_READ_DATA etc.) */ |
| mode_t mode; /* file stat.st_mode */ |
| uid_t uid; /* file stat.st_uid */ |
| }; |
| |
| static unsigned int generic_file_map_access( unsigned int access ); |
| |
| static void file_dump( struct object *obj, int verbose ); |
| static struct object_type *file_get_type( struct object *obj ); |
| static struct fd *file_get_fd( struct object *obj ); |
| static struct security_descriptor *file_get_sd( struct object *obj ); |
| static int file_set_sd( struct object *obj, const struct security_descriptor *sd, unsigned int set_info ); |
| static struct object *file_lookup_name( struct object *obj, struct unicode_str *name, unsigned int attr ); |
| static struct object *file_open_file( struct object *obj, unsigned int access, |
| unsigned int sharing, unsigned int options ); |
| static void file_destroy( struct object *obj ); |
| |
| static int file_get_poll_events( struct fd *fd ); |
| static int file_flush( struct fd *fd, struct async *async ); |
| static enum server_fd_type file_get_fd_type( struct fd *fd ); |
| |
| static const struct object_ops file_ops = |
| { |
| sizeof(struct file), /* size */ |
| file_dump, /* dump */ |
| file_get_type, /* get_type */ |
| add_queue, /* add_queue */ |
| remove_queue, /* remove_queue */ |
| default_fd_signaled, /* signaled */ |
| no_satisfied, /* satisfied */ |
| no_signal, /* signal */ |
| file_get_fd, /* get_fd */ |
| default_fd_map_access, /* map_access */ |
| file_get_sd, /* get_sd */ |
| file_set_sd, /* set_sd */ |
| file_lookup_name, /* lookup_name */ |
| no_link_name, /* link_name */ |
| NULL, /* unlink_name */ |
| file_open_file, /* open_file */ |
| fd_close_handle, /* close_handle */ |
| file_destroy /* destroy */ |
| }; |
| |
| static const struct fd_ops file_fd_ops = |
| { |
| file_get_poll_events, /* get_poll_events */ |
| default_poll_event, /* poll_event */ |
| file_get_fd_type, /* get_fd_type */ |
| no_fd_read, /* read */ |
| no_fd_write, /* write */ |
| file_flush, /* flush */ |
| no_fd_get_volume_info, /* get_volume_info */ |
| default_fd_ioctl, /* ioctl */ |
| default_fd_queue_async, /* queue_async */ |
| default_fd_reselect_async /* reselect_async */ |
| }; |
| |
| static inline int is_overlapped( const struct file *file ) |
| { |
| return !(get_fd_options( file->fd ) & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)); |
| } |
| |
| /* create a file from a file descriptor */ |
| /* if the function fails the fd is closed */ |
| struct file *create_file_for_fd( int fd, unsigned int access, unsigned int sharing ) |
| { |
| struct file *file; |
| struct stat st; |
| |
| if (fstat( fd, &st ) == -1) |
| { |
| file_set_error(); |
| close( fd ); |
| return NULL; |
| } |
| |
| if (!(file = alloc_object( &file_ops ))) |
| { |
| close( fd ); |
| return NULL; |
| } |
| |
| file->mode = st.st_mode; |
| file->access = default_fd_map_access( &file->obj, access ); |
| if (!(file->fd = create_anonymous_fd( &file_fd_ops, fd, &file->obj, |
| FILE_SYNCHRONOUS_IO_NONALERT ))) |
| { |
| release_object( file ); |
| return NULL; |
| } |
| allow_fd_caching( file->fd ); |
| return file; |
| } |
| |
| /* create a file by duplicating an fd object */ |
| struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigned int sharing ) |
| { |
| struct file *file; |
| struct stat st; |
| |
| if (fstat( get_unix_fd(fd), &st ) == -1) |
| { |
| file_set_error(); |
| return NULL; |
| } |
| |
| if ((file = alloc_object( &file_ops ))) |
| { |
| file->mode = st.st_mode; |
| file->access = default_fd_map_access( &file->obj, access ); |
| if (!(file->fd = dup_fd_object( fd, access, sharing, FILE_SYNCHRONOUS_IO_NONALERT ))) |
| { |
| release_object( file ); |
| return NULL; |
| } |
| set_fd_user( file->fd, &file_fd_ops, &file->obj ); |
| } |
| return file; |
| } |
| |
| static struct object *create_file_obj( struct fd *fd, unsigned int access, mode_t mode ) |
| { |
| struct file *file = alloc_object( &file_ops ); |
| |
| if (!file) return NULL; |
| file->access = access; |
| file->mode = mode; |
| file->uid = ~(uid_t)0; |
| file->fd = fd; |
| grab_object( fd ); |
| set_fd_user( fd, &file_fd_ops, &file->obj ); |
| return &file->obj; |
| } |
| |
| static struct object *create_file( struct fd *root, const char *nameptr, data_size_t len, |
| unsigned int access, unsigned int sharing, int create, |
| unsigned int options, unsigned int attrs, |
| const struct security_descriptor *sd ) |
| { |
| struct object *obj = NULL; |
| struct fd *fd; |
| int flags; |
| char *name; |
| mode_t mode; |
| |
| if (!len || ((nameptr[0] == '/') ^ !root)) |
| { |
| set_error( STATUS_OBJECT_PATH_SYNTAX_BAD ); |
| return NULL; |
| } |
| if (!(name = mem_alloc( len + 1 ))) return NULL; |
| memcpy( name, nameptr, len ); |
| name[len] = 0; |
| |
| switch(create) |
| { |
| case FILE_CREATE: flags = O_CREAT | O_EXCL; break; |
| case FILE_OVERWRITE_IF: /* FIXME: the difference is whether we trash existing attr or not */ |
| access |= FILE_WRITE_ATTRIBUTES; |
| case FILE_SUPERSEDE: flags = O_CREAT | O_TRUNC; break; |
| case FILE_OPEN: flags = 0; break; |
| case FILE_OPEN_IF: flags = O_CREAT; break; |
| case FILE_OVERWRITE: flags = O_TRUNC; |
| access |= FILE_WRITE_ATTRIBUTES; break; |
| default: set_error( STATUS_INVALID_PARAMETER ); goto done; |
| } |
| |
| if (sd) |
| { |
| const SID *owner = sd_get_owner( sd ); |
| if (!owner) |
| owner = token_get_user( current->process->token ); |
| mode = sd_to_mode( sd, owner ); |
| } |
| else if (options & FILE_DIRECTORY_FILE) |
| mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0555 : 0777; |
| else |
| mode = (attrs & FILE_ATTRIBUTE_READONLY) ? 0444 : 0666; |
| |
| if (len >= 4 && |
| (!strcasecmp( name + len - 4, ".exe" ) || !strcasecmp( name + len - 4, ".com" ))) |
| { |
| if (mode & S_IRUSR) |
| mode |= S_IXUSR; |
| if (mode & S_IRGRP) |
| mode |= S_IXGRP; |
| if (mode & S_IROTH) |
| mode |= S_IXOTH; |
| } |
| |
| access = generic_file_map_access( access ); |
| |
| /* FIXME: should set error to STATUS_OBJECT_NAME_COLLISION if file existed before */ |
| fd = open_fd( root, name, flags | O_NONBLOCK | O_LARGEFILE, &mode, access, sharing, options ); |
| if (!fd) goto done; |
| |
| if (S_ISDIR(mode)) |
| obj = create_dir_obj( fd, access, mode ); |
| else if (S_ISCHR(mode) && is_serial_fd( fd )) |
| obj = create_serial( fd ); |
| else |
| obj = create_file_obj( fd, access, mode ); |
| |
| release_object( fd ); |
| |
| done: |
| free( name ); |
| return obj; |
| } |
| |
| static void file_dump( struct object *obj, int verbose ) |
| { |
| struct file *file = (struct file *)obj; |
| assert( obj->ops == &file_ops ); |
| fprintf( stderr, "File fd=%p\n", file->fd ); |
| } |
| |
| static struct object_type *file_get_type( struct object *obj ) |
| { |
| static const WCHAR name[] = {'F','i','l','e'}; |
| static const struct unicode_str str = { name, sizeof(name) }; |
| return get_object_type( &str ); |
| } |
| |
| static int file_get_poll_events( struct fd *fd ) |
| { |
| struct file *file = get_fd_user( fd ); |
| int events = 0; |
| assert( file->obj.ops == &file_ops ); |
| if (file->access & FILE_UNIX_READ_ACCESS) events |= POLLIN; |
| if (file->access & FILE_UNIX_WRITE_ACCESS) events |= POLLOUT; |
| return events; |
| } |
| |
| static int file_flush( struct fd *fd, struct async *async ) |
| { |
| int unix_fd = get_unix_fd( fd ); |
| if (unix_fd != -1 && fsync( unix_fd ) == -1) |
| { |
| file_set_error(); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static enum server_fd_type file_get_fd_type( struct fd *fd ) |
| { |
| struct file *file = get_fd_user( fd ); |
| |
| if (S_ISREG(file->mode) || S_ISBLK(file->mode)) return FD_TYPE_FILE; |
| if (S_ISDIR(file->mode)) return FD_TYPE_DIR; |
| return FD_TYPE_CHAR; |
| } |
| |
| static struct fd *file_get_fd( struct object *obj ) |
| { |
| struct file *file = (struct file *)obj; |
| assert( obj->ops == &file_ops ); |
| return (struct fd *)grab_object( file->fd ); |
| } |
| |
| static unsigned int generic_file_map_access( unsigned int access ) |
| { |
| if (access & GENERIC_READ) access |= FILE_GENERIC_READ; |
| if (access & GENERIC_WRITE) access |= FILE_GENERIC_WRITE; |
| if (access & GENERIC_EXECUTE) access |= FILE_GENERIC_EXECUTE; |
| if (access & GENERIC_ALL) access |= FILE_ALL_ACCESS; |
| return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL); |
| } |
| |
| struct security_descriptor *mode_to_sd( mode_t mode, const SID *user, const SID *group ) |
| { |
| struct security_descriptor *sd; |
| size_t dacl_size; |
| ACE_HEADER *current_ace; |
| ACCESS_ALLOWED_ACE *aaa; |
| ACL *dacl; |
| SID *sid; |
| char *ptr; |
| const SID *world_sid = security_world_sid; |
| const SID *local_system_sid = security_local_system_sid; |
| |
| dacl_size = sizeof(ACL) + FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) + |
| security_sid_len( local_system_sid ); |
| if (mode & S_IRWXU) |
| dacl_size += FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) + security_sid_len( user ); |
| if ((!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) || |
| (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) || |
| (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))) |
| dacl_size += FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart) + security_sid_len( user ); |
| if (mode & S_IRWXO) |
| dacl_size += FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) + security_sid_len( world_sid ); |
| |
| sd = mem_alloc( sizeof(struct security_descriptor) + |
| security_sid_len( user ) + security_sid_len( group ) + |
| dacl_size ); |
| if (!sd) return sd; |
| |
| sd->control = SE_DACL_PRESENT; |
| sd->owner_len = security_sid_len( user ); |
| sd->group_len = security_sid_len( group ); |
| sd->sacl_len = 0; |
| sd->dacl_len = dacl_size; |
| |
| ptr = (char *)(sd + 1); |
| memcpy( ptr, user, sd->owner_len ); |
| ptr += sd->owner_len; |
| memcpy( ptr, group, sd->group_len ); |
| ptr += sd->group_len; |
| |
| dacl = (ACL *)ptr; |
| dacl->AclRevision = ACL_REVISION; |
| dacl->Sbz1 = 0; |
| dacl->AclSize = dacl_size; |
| dacl->AceCount = 1 + (mode & S_IRWXU ? 1 : 0) + (mode & S_IRWXO ? 1 : 0); |
| if ((!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) || |
| (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) || |
| (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))) |
| dacl->AceCount++; |
| dacl->Sbz2 = 0; |
| |
| /* always give FILE_ALL_ACCESS for Local System */ |
| aaa = (ACCESS_ALLOWED_ACE *)(dacl + 1); |
| current_ace = &aaa->Header; |
| aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE; |
| aaa->Header.AceFlags = (mode & S_IFDIR) ? OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE : 0; |
| aaa->Header.AceSize = FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) + security_sid_len( local_system_sid ); |
| aaa->Mask = FILE_ALL_ACCESS; |
| sid = (SID *)&aaa->SidStart; |
| memcpy( sid, local_system_sid, security_sid_len( local_system_sid )); |
| |
| if (mode & S_IRWXU) |
| { |
| /* appropriate access rights for the user */ |
| aaa = (ACCESS_ALLOWED_ACE *)ace_next( current_ace ); |
| current_ace = &aaa->Header; |
| aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE; |
| aaa->Header.AceFlags = (mode & S_IFDIR) ? OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE : 0; |
| aaa->Header.AceSize = FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) + security_sid_len( user ); |
| aaa->Mask = WRITE_DAC | WRITE_OWNER; |
| if (mode & S_IRUSR) |
| aaa->Mask |= FILE_GENERIC_READ | FILE_GENERIC_EXECUTE; |
| if (mode & S_IWUSR) |
| aaa->Mask |= FILE_GENERIC_WRITE | DELETE | FILE_DELETE_CHILD; |
| sid = (SID *)&aaa->SidStart; |
| memcpy( sid, user, security_sid_len( user )); |
| } |
| if ((!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) || |
| (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IWOTH))) || |
| (!(mode & S_IXUSR) && (mode & (S_IXGRP|S_IXOTH)))) |
| { |
| /* deny just in case the user is a member of the group */ |
| ACCESS_DENIED_ACE *ada = (ACCESS_DENIED_ACE *)ace_next( current_ace ); |
| current_ace = &ada->Header; |
| ada->Header.AceType = ACCESS_DENIED_ACE_TYPE; |
| ada->Header.AceFlags = (mode & S_IFDIR) ? OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE : 0; |
| ada->Header.AceSize = FIELD_OFFSET(ACCESS_DENIED_ACE, SidStart) + security_sid_len( user ); |
| ada->Mask = 0; |
| if (!(mode & S_IRUSR) && (mode & (S_IRGRP|S_IROTH))) |
| ada->Mask |= FILE_GENERIC_READ | FILE_GENERIC_EXECUTE; |
| if (!(mode & S_IWUSR) && (mode & (S_IWGRP|S_IROTH))) |
| ada->Mask |= FILE_GENERIC_WRITE | DELETE | FILE_DELETE_CHILD; |
| ada->Mask &= ~STANDARD_RIGHTS_ALL; /* never deny standard rights */ |
| sid = (SID *)&ada->SidStart; |
| memcpy( sid, user, security_sid_len( user )); |
| } |
| if (mode & S_IRWXO) |
| { |
| /* appropriate access rights for Everyone */ |
| aaa = (ACCESS_ALLOWED_ACE *)ace_next( current_ace ); |
| current_ace = &aaa->Header; |
| aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE; |
| aaa->Header.AceFlags = (mode & S_IFDIR) ? OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE : 0; |
| aaa->Header.AceSize = FIELD_OFFSET(ACCESS_ALLOWED_ACE, SidStart) + security_sid_len( world_sid ); |
| aaa->Mask = 0; |
| if (mode & S_IROTH) |
| aaa->Mask |= FILE_GENERIC_READ | FILE_GENERIC_EXECUTE; |
| if (mode & S_IWOTH) |
| aaa->Mask |= FILE_GENERIC_WRITE | DELETE | FILE_DELETE_CHILD; |
| sid = (SID *)&aaa->SidStart; |
| memcpy( sid, world_sid, security_sid_len( world_sid )); |
| } |
| |
| return sd; |
| } |
| |
| static struct security_descriptor *file_get_sd( struct object *obj ) |
| { |
| struct file *file = (struct file *)obj; |
| struct stat st; |
| int unix_fd; |
| struct security_descriptor *sd; |
| |
| assert( obj->ops == &file_ops ); |
| |
| unix_fd = get_file_unix_fd( file ); |
| |
| if (unix_fd == -1 || fstat( unix_fd, &st ) == -1) |
| return obj->sd; |
| |
| /* mode and uid the same? if so, no need to re-generate security descriptor */ |
| if (obj->sd && (st.st_mode & (S_IRWXU|S_IRWXO)) == (file->mode & (S_IRWXU|S_IRWXO)) && |
| (st.st_uid == file->uid)) |
| return obj->sd; |
| |
| sd = mode_to_sd( st.st_mode, |
| security_unix_uid_to_sid( st.st_uid ), |
| token_get_primary_group( current->process->token )); |
| if (!sd) return obj->sd; |
| |
| file->mode = st.st_mode; |
| file->uid = st.st_uid; |
| free( obj->sd ); |
| obj->sd = sd; |
| return sd; |
| } |
| |
| static mode_t file_access_to_mode( unsigned int access ) |
| { |
| mode_t mode = 0; |
| |
| access = generic_file_map_access( access ); |
| if (access & FILE_READ_DATA) mode |= 4; |
| if (access & (FILE_WRITE_DATA|FILE_APPEND_DATA)) mode |= 2; |
| if (access & FILE_EXECUTE) mode |= 1; |
| return mode; |
| } |
| |
| mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner ) |
| { |
| mode_t new_mode = 0; |
| mode_t bits_to_set = ~0; |
| mode_t mode; |
| int present; |
| const ACL *dacl = sd_get_dacl( sd, &present ); |
| const SID *user = token_get_user( current->process->token ); |
| if (present && dacl) |
| { |
| const ACE_HEADER *ace = (const ACE_HEADER *)(dacl + 1); |
| ULONG i; |
| for (i = 0; i < dacl->AceCount; i++, ace = ace_next( ace )) |
| { |
| const ACCESS_ALLOWED_ACE *aa_ace; |
| const ACCESS_DENIED_ACE *ad_ace; |
| const SID *sid; |
| |
| if (ace->AceFlags & INHERIT_ONLY_ACE) continue; |
| |
| switch (ace->AceType) |
| { |
| case ACCESS_DENIED_ACE_TYPE: |
| ad_ace = (const ACCESS_DENIED_ACE *)ace; |
| sid = (const SID *)&ad_ace->SidStart; |
| mode = file_access_to_mode( ad_ace->Mask ); |
| if (security_equal_sid( sid, security_world_sid )) |
| { |
| bits_to_set &= ~((mode << 6) | (mode << 3) | mode); /* all */ |
| } |
| else if ((security_equal_sid( user, owner ) && |
| token_sid_present( current->process->token, sid, TRUE ))) |
| { |
| bits_to_set &= ~((mode << 6) | (mode << 3)); /* user + group */ |
| } |
| else if (security_equal_sid( sid, owner )) |
| { |
| bits_to_set &= ~(mode << 6); /* user only */ |
| } |
| break; |
| case ACCESS_ALLOWED_ACE_TYPE: |
| aa_ace = (const ACCESS_ALLOWED_ACE *)ace; |
| sid = (const SID *)&aa_ace->SidStart; |
| mode = file_access_to_mode( aa_ace->Mask ); |
| if (security_equal_sid( sid, security_world_sid )) |
| { |
| mode = (mode << 6) | (mode << 3) | mode; /* all */ |
| new_mode |= mode & bits_to_set; |
| bits_to_set &= ~mode; |
| } |
| else if ((security_equal_sid( user, owner ) && |
| token_sid_present( current->process->token, sid, FALSE ))) |
| { |
| mode = (mode << 6) | (mode << 3); /* user + group */ |
| new_mode |= mode & bits_to_set; |
| bits_to_set &= ~mode; |
| } |
| else if (security_equal_sid( sid, owner )) |
| { |
| mode = (mode << 6); /* user only */ |
| new_mode |= mode & bits_to_set; |
| bits_to_set &= ~mode; |
| } |
| break; |
| } |
| } |
| } |
| else |
| /* no ACL means full access rights to anyone */ |
| new_mode = S_IRWXU | S_IRWXG | S_IRWXO; |
| |
| return new_mode; |
| } |
| |
| static int file_set_sd( struct object *obj, const struct security_descriptor *sd, |
| unsigned int set_info ) |
| { |
| struct file *file = (struct file *)obj; |
| const SID *owner; |
| struct stat st; |
| mode_t mode; |
| int unix_fd; |
| |
| assert( obj->ops == &file_ops ); |
| |
| unix_fd = get_file_unix_fd( file ); |
| |
| if (unix_fd == -1 || fstat( unix_fd, &st ) == -1) return 1; |
| |
| if (set_info & OWNER_SECURITY_INFORMATION) |
| { |
| owner = sd_get_owner( sd ); |
| if (!owner) |
| { |
| set_error( STATUS_INVALID_SECURITY_DESCR ); |
| return 0; |
| } |
| if (!obj->sd || !security_equal_sid( owner, sd_get_owner( obj->sd ) )) |
| { |
| /* FIXME: get Unix uid and call fchown */ |
| } |
| } |
| else if (obj->sd) |
| owner = sd_get_owner( obj->sd ); |
| else |
| owner = token_get_user( current->process->token ); |
| |
| /* group and sacl not supported */ |
| |
| if (set_info & DACL_SECURITY_INFORMATION) |
| { |
| /* keep the bits that we don't map to access rights in the ACL */ |
| mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX); |
| mode |= sd_to_mode( sd, owner ); |
| |
| if (((st.st_mode ^ mode) & (S_IRWXU|S_IRWXG|S_IRWXO)) && fchmod( unix_fd, mode ) == -1) |
| { |
| file_set_error(); |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| static struct object *file_lookup_name( struct object *obj, struct unicode_str *name, unsigned int attr ) |
| { |
| if (!name || !name->len) return NULL; /* open the file itself */ |
| |
| set_error( STATUS_OBJECT_PATH_NOT_FOUND ); |
| return NULL; |
| } |
| |
| static struct object *file_open_file( struct object *obj, unsigned int access, |
| unsigned int sharing, unsigned int options ) |
| { |
| struct file *file = (struct file *)obj; |
| struct object *new_file = NULL; |
| char *unix_name; |
| |
| assert( obj->ops == &file_ops ); |
| |
| if ((unix_name = dup_fd_name( file->fd, "" ))) |
| { |
| new_file = create_file( NULL, unix_name, strlen(unix_name), access, |
| sharing, FILE_OPEN, options, 0, NULL ); |
| free( unix_name ); |
| } |
| else set_error( STATUS_OBJECT_TYPE_MISMATCH ); |
| return new_file; |
| } |
| |
| static void file_destroy( struct object *obj ) |
| { |
| struct file *file = (struct file *)obj; |
| assert( obj->ops == &file_ops ); |
| |
| if (file->fd) release_object( file->fd ); |
| } |
| |
| /* set the last error depending on errno */ |
| void file_set_error(void) |
| { |
| switch (errno) |
| { |
| case ETXTBSY: |
| case EAGAIN: set_error( STATUS_SHARING_VIOLATION ); break; |
| case EBADF: set_error( STATUS_INVALID_HANDLE ); break; |
| case ENOSPC: set_error( STATUS_DISK_FULL ); break; |
| case EACCES: |
| case ESRCH: |
| case EROFS: |
| case EPERM: set_error( STATUS_ACCESS_DENIED ); break; |
| case EBUSY: set_error( STATUS_FILE_LOCK_CONFLICT ); break; |
| case ENOENT: set_error( STATUS_NO_SUCH_FILE ); break; |
| case EISDIR: set_error( STATUS_FILE_IS_A_DIRECTORY ); break; |
| case ENFILE: |
| case EMFILE: set_error( STATUS_TOO_MANY_OPENED_FILES ); break; |
| case EEXIST: set_error( STATUS_OBJECT_NAME_COLLISION ); break; |
| case EINVAL: set_error( STATUS_INVALID_PARAMETER ); break; |
| case ESPIPE: set_error( STATUS_ILLEGAL_FUNCTION ); break; |
| case ENOTEMPTY: set_error( STATUS_DIRECTORY_NOT_EMPTY ); break; |
| case EIO: set_error( STATUS_ACCESS_VIOLATION ); break; |
| case ENOTDIR: set_error( STATUS_NOT_A_DIRECTORY ); break; |
| case EFBIG: set_error( STATUS_SECTION_TOO_BIG ); break; |
| case ENODEV: set_error( STATUS_NO_SUCH_DEVICE ); break; |
| case ENXIO: set_error( STATUS_NO_SUCH_DEVICE ); break; |
| #ifdef EOVERFLOW |
| case EOVERFLOW: set_error( STATUS_INVALID_PARAMETER ); break; |
| #endif |
| default: |
| perror("wineserver: file_set_error() can't map error"); |
| set_error( STATUS_UNSUCCESSFUL ); |
| break; |
| } |
| } |
| |
| struct file *get_file_obj( struct process *process, obj_handle_t handle, unsigned int access ) |
| { |
| return (struct file *)get_handle_obj( process, handle, access, &file_ops ); |
| } |
| |
| int get_file_unix_fd( struct file *file ) |
| { |
| return get_unix_fd( file->fd ); |
| } |
| |
| /* create a file */ |
| DECL_HANDLER(create_file) |
| { |
| struct object *file; |
| struct fd *root_fd = NULL; |
| struct unicode_str unicode_name; |
| const struct security_descriptor *sd; |
| const struct object_attributes *objattr = get_req_object_attributes( &sd, &unicode_name, NULL ); |
| const char *name; |
| data_size_t name_len; |
| |
| if (!objattr) return; |
| |
| /* name is transferred in the unix codepage outside of the objattr structure */ |
| if (unicode_name.len) |
| { |
| set_error( STATUS_INVALID_PARAMETER ); |
| return; |
| } |
| |
| if (objattr->rootdir) |
| { |
| struct dir *root; |
| |
| if (!(root = get_dir_obj( current->process, objattr->rootdir, 0 ))) return; |
| root_fd = get_obj_fd( (struct object *)root ); |
| release_object( root ); |
| if (!root_fd) return; |
| } |
| |
| name = get_req_data_after_objattr( objattr, &name_len ); |
| |
| reply->handle = 0; |
| if ((file = create_file( root_fd, name, name_len, req->access, req->sharing, |
| req->create, req->options, req->attrs, sd ))) |
| { |
| reply->handle = alloc_handle( current->process, file, req->access, objattr->attributes ); |
| release_object( file ); |
| } |
| if (root_fd) release_object( root_fd ); |
| } |
| |
| /* allocate a file handle for a Unix fd */ |
| DECL_HANDLER(alloc_file_handle) |
| { |
| struct file *file; |
| int fd; |
| |
| reply->handle = 0; |
| if ((fd = thread_get_inflight_fd( current, req->fd )) == -1) |
| { |
| set_error( STATUS_INVALID_HANDLE ); |
| return; |
| } |
| if ((file = create_file_for_fd( fd, req->access, FILE_SHARE_READ | FILE_SHARE_WRITE ))) |
| { |
| reply->handle = alloc_handle( current->process, file, req->access, req->attributes ); |
| release_object( file ); |
| } |
| } |
| |
| /* lock a region of a file */ |
| DECL_HANDLER(lock_file) |
| { |
| struct file *file; |
| |
| if ((file = get_file_obj( current->process, req->handle, 0 ))) |
| { |
| reply->handle = lock_fd( file->fd, req->offset, req->count, req->shared, req->wait ); |
| reply->overlapped = is_overlapped( file ); |
| release_object( file ); |
| } |
| } |
| |
| /* unlock a region of a file */ |
| DECL_HANDLER(unlock_file) |
| { |
| struct file *file; |
| |
| if ((file = get_file_obj( current->process, req->handle, 0 ))) |
| { |
| unlock_fd( file->fd, req->offset, req->count ); |
| release_object( file ); |
| } |
| } |
