X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Funix_apply.c;h=e6bd2321276baeae20b1f177c21b211a24cd45df;hp=bf9c2911d57630ed2f847f68e4a35df9e00d92bb;hb=3abe6501c7ebb20a0ead1cd69ebd93cbe6b917e1;hpb=71d3401258fb14dcfc921f53452ba972e27e8b8b diff --git a/src/unix_apply.c b/src/unix_apply.c index bf9c2911..e6bd2321 100644 --- a/src/unix_apply.c +++ b/src/unix_apply.c @@ -5,42 +5,42 @@ /* * Copyright (C) 2012, 2013, 2014 Eric Biggers * - * This file is part of wimlib, a library for working with WIM files. + * This file 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 3 of the License, or (at your option) any + * later version. * - * wimlib 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. - * - * wimlib 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 + * This file 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 General Public License - * along with wimlib; if not, see http://www.gnu.org/licenses/. + * You should have received a copy of the GNU Lesser General Public License + * along with this file; if not, see http://www.gnu.org/licenses/. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif -#include "wimlib/apply.h" -#include "wimlib/dentry.h" -#include "wimlib/error.h" -#include "wimlib/file_io.h" -#include "wimlib/reparse.h" -#include "wimlib/timestamp.h" - #include #include -#include #include #include #include #include #include +#include "wimlib/apply.h" +#include "wimlib/assert.h" +#include "wimlib/blob_table.h" +#include "wimlib/dentry.h" +#include "wimlib/error.h" +#include "wimlib/file_io.h" +#include "wimlib/reparse.h" +#include "wimlib/timestamp.h" +#include "wimlib/unix_data.h" + /* We don't require O_NOFOLLOW, but the advantage of having it is that if we * need to extract a file to a location at which there exists a symbolic link, * open(..., O_NOFOLLOW | ...) recognizes the symbolic link rather than @@ -63,8 +63,6 @@ unix_get_supported_features(const char *target, } #define NUM_PATHBUFS 2 /* We need 2 when creating hard links */ -#define MAX_OPEN_FDS 1024 /* TODO: Add special case for when the number of - identical streams exceeds this number. */ struct unix_apply_ctx { /* Extract flags, the pointer to the WIMStruct, etc. */ @@ -77,13 +75,13 @@ struct unix_apply_ctx { unsigned which_pathbuf; /* Currently open file descriptors for extraction */ - struct filedes open_fds[MAX_OPEN_FDS]; + struct filedes open_fds[MAX_OPEN_FILES]; /* Number of currently open file descriptors in open_fds, starting from * the beginning of the array. */ unsigned num_open_fds; - /* Buffer for reading reparse data streams into memory */ + /* Buffer for reading reparse point data into memory */ u8 reparse_data[REPARSE_DATA_MAX_SIZE]; /* Pointer to the next byte in @reparse_data to fill */ @@ -95,6 +93,9 @@ struct unix_apply_ctx { /* Number of characters in target_abspath. */ size_t target_abspath_nchars; + + /* Number of special files we couldn't create due to EPERM */ + unsigned long num_special_files_ignored; }; /* Returns the number of characters needed to represent the path to the @@ -109,7 +110,7 @@ unix_dentry_path_length(const struct wim_dentry *dentry) d = dentry; do { len += d->d_extraction_name_nchars + 1; - d = d->parent; + d = d->d_parent; } while (!dentry_is_root(d) && will_extract_dentry(d)); return len; @@ -157,7 +158,7 @@ unix_build_extraction_path(const struct wim_dentry *dentry, p -= d->d_extraction_name_nchars; memcpy(p, d->d_extraction_name, d->d_extraction_name_nchars); *--p = '/'; - d = d->parent; + d = d->d_parent; } while (!dentry_is_root(d) && will_extract_dentry(d)); return pathbuf; @@ -252,16 +253,17 @@ unix_set_metadata(int fd, const struct wim_inode *inode, const char *path, struct unix_apply_ctx *ctx) { int ret; + struct wimlib_unix_data unix_data; if (fd < 0 && !path) path = unix_build_inode_extraction_path(inode, ctx); if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) - && inode_has_unix_data(inode)) + && inode_get_unix_data(inode, &unix_data)) { - u32 uid = inode->i_unix_data.uid; - u32 gid = inode->i_unix_data.gid; - u32 mode = inode->i_unix_data.mode; + u32 uid = unix_data.uid; + u32 gid = unix_data.gid; + u32 mode = unix_data.mode; ret = unix_set_owner_and_group(fd, path, uid, gid); if (ret) { @@ -368,18 +370,19 @@ unix_create_if_directory(const struct wim_dentry *dentry, ERROR_WITH_ERRNO("Can't create directory \"%s\"", path); return WIMLIB_ERR_MKDIR; } - return 0; + + return report_file_created(&ctx->common); } -/* If @dentry represents an empty regular file, create it, set its metadata, and - * create any needed hard links. */ +/* If @dentry represents an empty regular file or a special file, create it, set + * its metadata, and create any needed hard links. */ static int unix_extract_if_empty_file(const struct wim_dentry *dentry, struct unix_apply_ctx *ctx) { const struct wim_inode *inode; + struct wimlib_unix_data unix_data; const char *path; - int fd; int ret; inode = dentry->d_inode; @@ -388,31 +391,63 @@ unix_extract_if_empty_file(const struct wim_dentry *dentry, if (dentry != inode_first_extraction_dentry(inode)) return 0; - /* Not an empty regular file? */ + /* Is this a directory, a symbolic link, or any type of nonempty file? + */ if (inode_is_directory(inode) || inode_is_symlink(inode) || - inode_unnamed_lte_resolved(inode)) + inode_get_blob_for_unnamed_data_stream_resolved(inode)) return 0; - path = unix_build_extraction_path(dentry, ctx); -retry_create: - fd = open(path, O_TRUNC | O_CREAT | O_WRONLY | O_NOFOLLOW, 0644); - if (fd < 0) { - if (errno == EEXIST && !unlink(path)) - goto retry_create; - ERROR_WITH_ERRNO("Can't create regular file \"%s\"", path); - return WIMLIB_ERR_OPEN; - } - /* On empty files, we can set timestamps immediately because we don't - * need to write any data to them. */ - ret = unix_set_metadata(fd, inode, path, ctx); - if (close(fd) && !ret) { - ERROR_WITH_ERRNO("Error closing \"%s\"", path); - ret = WIMLIB_ERR_WRITE; + /* Recognize special files in UNIX_DATA mode */ + if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) && + inode_get_unix_data(inode, &unix_data) && + !S_ISREG(unix_data.mode)) + { + path = unix_build_extraction_path(dentry, ctx); + retry_mknod: + if (mknod(path, unix_data.mode, unix_data.rdev)) { + if (errno == EPERM) { + WARNING_WITH_ERRNO("Can't create special " + "file \"%s\"", path); + ctx->num_special_files_ignored++; + return 0; + } + if (errno == EEXIST && !unlink(path)) + goto retry_mknod; + ERROR_WITH_ERRNO("Can't create special file \"%s\"", + path); + return WIMLIB_ERR_MKNOD; + } + /* On special files, we can set timestamps immediately because + * we don't need to write any data to them. */ + ret = unix_set_metadata(-1, inode, path, ctx); + } else { + int fd; + + path = unix_build_extraction_path(dentry, ctx); + retry_create: + fd = open(path, O_TRUNC | O_CREAT | O_WRONLY | O_NOFOLLOW, 0644); + if (fd < 0) { + if (errno == EEXIST && !unlink(path)) + goto retry_create; + ERROR_WITH_ERRNO("Can't create regular file \"%s\"", path); + return WIMLIB_ERR_OPEN; + } + /* On empty files, we can set timestamps immediately because we + * don't need to write any data to them. */ + ret = unix_set_metadata(fd, inode, path, ctx); + if (close(fd) && !ret) { + ERROR_WITH_ERRNO("Error closing \"%s\"", path); + ret = WIMLIB_ERR_WRITE; + } } if (ret) return ret; - return unix_create_hardlinks(inode, dentry, path, ctx); + ret = unix_create_hardlinks(inode, dentry, path, ctx); + if (ret) + return ret; + + return report_file_created(&ctx->common); } static int @@ -435,6 +470,30 @@ unix_create_dirs_and_empty_files(const struct list_head *dentry_list, return 0; } +static void +unix_count_dentries(const struct list_head *dentry_list, + uint64_t *dir_count_ret, uint64_t *empty_file_count_ret) +{ + const struct wim_dentry *dentry; + uint64_t dir_count = 0; + uint64_t empty_file_count = 0; + + list_for_each_entry(dentry, dentry_list, d_extraction_list_node) { + + const struct wim_inode *inode = dentry->d_inode; + + if (inode_is_directory(inode)) + dir_count++; + else if ((dentry == inode_first_extraction_dentry(inode)) && + !inode_is_symlink(inode) && + !inode_get_blob_for_unnamed_data_stream_resolved(inode)) + empty_file_count++; + } + + *dir_count_ret = dir_count; + *empty_file_count_ret = empty_file_count; +} + static int unix_create_symlink(const struct wim_inode *inode, const char *path, const u8 *rpdata, u16 rpdatalen, bool rpfix, @@ -442,14 +501,13 @@ unix_create_symlink(const struct wim_inode *inode, const char *path, { char link_target[REPARSE_DATA_MAX_SIZE]; int ret; - struct wim_lookup_table_entry lte_override; + struct blob_descriptor blob_override; - lte_override.resource_location = RESOURCE_IN_ATTACHED_BUFFER; - lte_override.attached_buffer = (void *)rpdata; - lte_override.size = rpdatalen; + blob_set_is_located_in_attached_buffer(&blob_override, + (void *)rpdata, rpdatalen); ret = wim_inode_readlink(inode, link_target, - sizeof(link_target) - 1, <e_override); + sizeof(link_target) - 1, &blob_override); if (ret < 0) { errno = -ret; return WIMLIB_ERR_READLINK; @@ -488,28 +546,36 @@ unix_cleanup_open_fds(struct unix_apply_ctx *ctx, unsigned offset) } static int -unix_begin_extract_stream_instance(const struct wim_lookup_table_entry *stream, - const struct wim_inode *inode, - struct unix_apply_ctx *ctx) +unix_begin_extract_blob_instance(const struct blob_descriptor *blob, + const struct wim_inode *inode, + const struct wim_inode_stream *strm, + struct unix_apply_ctx *ctx) { const struct wim_dentry *first_dentry; const char *first_path; int fd; - if (inode_is_symlink(inode)) { + if (unlikely(strm->stream_type == STREAM_TYPE_REPARSE_POINT)) { /* On UNIX, symbolic links must be created with symlink(), which * requires that the full link target be available. */ - if (stream->size > REPARSE_DATA_MAX_SIZE) { + if (blob->size > REPARSE_DATA_MAX_SIZE) { ERROR_WITH_ERRNO("Reparse data of \"%s\" has size " "%"PRIu64" bytes (exceeds %u bytes)", inode_first_full_path(inode), - stream->size, REPARSE_DATA_MAX_SIZE); + blob->size, REPARSE_DATA_MAX_SIZE); return WIMLIB_ERR_INVALID_REPARSE_DATA; } ctx->reparse_ptr = ctx->reparse_data; return 0; } + wimlib_assert(stream_is_unnamed_data_stream(strm)); + + /* Unnamed data stream of "regular" file */ + + /* This should be ensured by extract_blob_list() */ + wimlib_assert(ctx->num_open_fds < MAX_OPEN_FILES); + first_dentry = inode_first_extraction_dentry(inode); first_path = unix_build_extraction_path(first_dentry, ctx); retry_create: @@ -524,19 +590,18 @@ retry_create: return unix_create_hardlinks(inode, first_dentry, first_path, ctx); } -/* Called when starting to read a single-instance stream for extraction */ +/* Called when starting to read a blob for extraction */ static int -unix_begin_extract_stream(struct wim_lookup_table_entry *stream, - u32 flags, void *_ctx) +unix_begin_extract_blob(struct blob_descriptor *blob, void *_ctx) { struct unix_apply_ctx *ctx = _ctx; - const struct stream_owner *owners = stream_owners(stream); - int ret; - - for (u32 i = 0; i < stream->out_refcnt; i++) { - const struct wim_inode *inode = owners[i].inode; + const struct blob_extraction_target *targets = blob_extraction_targets(blob); - ret = unix_begin_extract_stream_instance(stream, inode, ctx); + for (u32 i = 0; i < blob->out_refcnt; i++) { + int ret = unix_begin_extract_blob_instance(blob, + targets[i].inode, + targets[i].stream, + ctx); if (ret) { ctx->reparse_ptr = NULL; unix_cleanup_open_fds(ctx, 0); @@ -546,8 +611,7 @@ unix_begin_extract_stream(struct wim_lookup_table_entry *stream, return 0; } -/* Called when the next chunk of a single-instance stream has been read for - * extraction */ +/* Called when the next chunk of a blob has been read for extraction */ static int unix_extract_chunk(const void *chunk, size_t size, void *_ctx) { @@ -566,15 +630,14 @@ unix_extract_chunk(const void *chunk, size_t size, void *_ctx) return 0; } -/* Called when a single-instance stream has been fully read for extraction */ +/* Called when a blob has been fully read for extraction */ static int -unix_end_extract_stream(struct wim_lookup_table_entry *stream, int status, - void *_ctx) +unix_end_extract_blob(struct blob_descriptor *blob, int status, void *_ctx) { struct unix_apply_ctx *ctx = _ctx; int ret; unsigned j; - const struct stream_owner *owners = stream_owners(stream); + const struct blob_extraction_target *targets = blob_extraction_targets(blob); ctx->reparse_ptr = NULL; @@ -585,20 +648,24 @@ unix_end_extract_stream(struct wim_lookup_table_entry *stream, int status, j = 0; ret = 0; - for (u32 i = 0; i < stream->out_refcnt; i++) { - struct wim_inode *inode = owners[i].inode; + for (u32 i = 0; i < blob->out_refcnt; i++) { + struct wim_inode *inode = targets[i].inode; if (inode_is_symlink(inode)) { /* We finally have the symlink data, so we can create * the symlink. */ const char *path; + bool rpfix; + + rpfix = (ctx->common.extract_flags & + WIMLIB_EXTRACT_FLAG_RPFIX) && + !inode->i_not_rpfixed; path = unix_build_inode_extraction_path(inode, ctx); ret = unix_create_symlink(inode, path, ctx->reparse_data, - stream->size, - (ctx->common.extract_flags & - WIMLIB_EXTRACT_FLAG_RPFIX), + blob->size, + rpfix, ctx->target_abspath, ctx->target_abspath_nchars); if (ret) { @@ -642,6 +709,9 @@ unix_set_dir_metadata(struct list_head *dentry_list, struct unix_apply_ctx *ctx) ret = unix_set_metadata(-1, dentry->d_inode, NULL, ctx); if (ret) return ret; + ret = report_file_metadata_applied(&ctx->common); + if (ret) + return ret; } } return 0; @@ -653,6 +723,8 @@ unix_extract(struct list_head *dentry_list, struct apply_ctx *_ctx) int ret; struct unix_apply_ctx *ctx = (struct unix_apply_ctx *)_ctx; size_t path_max; + uint64_t dir_count; + uint64_t empty_file_count; /* Compute the maximum path length that will be needed, then allocate * some path buffers. */ @@ -673,11 +745,22 @@ unix_extract(struct list_head *dentry_list, struct apply_ctx *_ctx) /* Extract directories and empty regular files. Directories are needed * because we can't extract any other files until their directories * exist. Empty files are needed because they don't have - * representatives in the stream list. */ + * representatives in the blob list. */ + + unix_count_dentries(dentry_list, &dir_count, &empty_file_count); + + ret = start_file_structure_phase(&ctx->common, dir_count + empty_file_count); + if (ret) + goto out; + ret = unix_create_dirs_and_empty_files(dentry_list, ctx); if (ret) goto out; + ret = end_file_structure_phase(&ctx->common); + if (ret) + goto out; + /* Get full path to target if needed for absolute symlink fixups. */ if ((ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) && ctx->common.required_features.symlink_reparse_points) @@ -692,21 +775,37 @@ unix_extract(struct list_head *dentry_list, struct apply_ctx *_ctx) /* Extract nonempty regular files and symbolic links. */ - struct read_stream_list_callbacks cbs = { - .begin_stream = unix_begin_extract_stream, - .begin_stream_ctx = ctx, + struct read_blob_list_callbacks cbs = { + .begin_blob = unix_begin_extract_blob, + .begin_blob_ctx = ctx, .consume_chunk = unix_extract_chunk, .consume_chunk_ctx = ctx, - .end_stream = unix_end_extract_stream, - .end_stream_ctx = ctx, + .end_blob = unix_end_extract_blob, + .end_blob_ctx = ctx, }; - ret = extract_stream_list(&ctx->common, &cbs); + ret = extract_blob_list(&ctx->common, &cbs); if (ret) goto out; + /* Set directory metadata. We do this last so that we get the right * directory timestamps. */ + ret = start_file_metadata_phase(&ctx->common, dir_count); + if (ret) + goto out; + ret = unix_set_dir_metadata(dentry_list, ctx); + if (ret) + goto out; + + ret = end_file_metadata_phase(&ctx->common); + if (ret) + goto out; + + if (ctx->num_special_files_ignored) { + WARNING("%lu special files were not extracted due to EPERM!", + ctx->num_special_files_ignored); + } out: for (unsigned i = 0; i < NUM_PATHBUFS; i++) FREE(ctx->pathbufs[i]);