diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_disk_entry_from_file.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_disk_entry_from_file.c | 1008 |
1 files changed, 1008 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_disk_entry_from_file.c b/Utilities/cmlibarchive/libarchive/archive_read_disk_entry_from_file.c new file mode 100644 index 000000000..fdeb5166d --- /dev/null +++ b/Utilities/cmlibarchive/libarchive/archive_read_disk_entry_from_file.c @@ -0,0 +1,1008 @@ +/*- + * Copyright (c) 2003-2009 Tim Kientzle + * Copyright (c) 2010 Michihiro NAKAJIMA + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "archive_platform.h" +__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_disk_entry_from_file.c 201084 2009-12-28 02:14:09Z kientzle $"); + +/* This is the tree-walking code for POSIX systems. */ +#if !defined(_WIN32) || defined(__CYGWIN__) + +#ifdef HAVE_SYS_TYPES_H +/* Mac OSX requires sys/types.h before sys/acl.h. */ +#include <sys/types.h> +#endif +#ifdef HAVE_SYS_ACL_H +#include <sys/acl.h> +#endif +#ifdef HAVE_SYS_EXTATTR_H +#include <sys/extattr.h> +#endif +#ifdef HAVE_SYS_IOCTL_H +#include <sys/ioctl.h> +#endif +#ifdef HAVE_SYS_PARAM_H +#include <sys/param.h> +#endif +#ifdef HAVE_SYS_STAT_H +#include <sys/stat.h> +#endif +#ifdef HAVE_SYS_XATTR_H +#include <sys/xattr.h> +#endif +#ifdef HAVE_SYS_EA_H +#include <sys/ea.h> +#endif +#ifdef HAVE_ACL_LIBACL_H +#include <acl/libacl.h> +#endif +#ifdef HAVE_ATTR_XATTR_H +#include <attr/xattr.h> +#endif +#ifdef HAVE_COPYFILE_H +#include <copyfile.h> +#endif +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_FCNTL_H +#include <fcntl.h> +#endif +#ifdef HAVE_LIMITS_H +#include <limits.h> +#endif +#ifdef HAVE_LINUX_TYPES_H +#include <linux/types.h> +#endif +#ifdef HAVE_LINUX_FIEMAP_H +#include <linux/fiemap.h> +#endif +#ifdef HAVE_LINUX_FS_H +#include <linux/fs.h> +#endif +/* + * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h. + * As the include guards don't agree, the order of include is important. + */ +#ifdef HAVE_LINUX_EXT2_FS_H +#include <linux/ext2_fs.h> /* for Linux file flags */ +#endif +#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__) +#include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */ +#endif +#ifdef HAVE_PATHS_H +#include <paths.h> +#endif +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "archive.h" +#include "archive_entry.h" +#include "archive_private.h" +#include "archive_read_disk_private.h" + +/* + * Linux and FreeBSD plug this obvious hole in POSIX.1e in + * different ways. + */ +#if HAVE_ACL_GET_PERM +#define ACL_GET_PERM acl_get_perm +#elif HAVE_ACL_GET_PERM_NP +#define ACL_GET_PERM acl_get_perm_np +#endif + +static int setup_acls_posix1e(struct archive_read_disk *, + struct archive_entry *, int fd); +static int setup_mac_metadata(struct archive_read_disk *, + struct archive_entry *, int fd); +static int setup_xattrs(struct archive_read_disk *, + struct archive_entry *, int fd); +static int setup_sparse(struct archive_read_disk *, + struct archive_entry *, int fd); + +int +archive_read_disk_entry_from_file(struct archive *_a, + struct archive_entry *entry, + int fd, + const struct stat *st) +{ + struct archive_read_disk *a = (struct archive_read_disk *)_a; + const char *path, *name; + struct stat s; + int initial_fd = fd; + int r, r1; + + archive_clear_error(_a); + path = archive_entry_sourcepath(entry); + if (path == NULL) + path = archive_entry_pathname(entry); + + if (a->tree == NULL) { + if (st == NULL) { +#if HAVE_FSTAT + if (fd >= 0) { + if (fstat(fd, &s) != 0) { + archive_set_error(&a->archive, errno, + "Can't fstat"); + return (ARCHIVE_FAILED); + } + } else +#endif +#if HAVE_LSTAT + if (!a->follow_symlinks) { + if (lstat(path, &s) != 0) { + archive_set_error(&a->archive, errno, + "Can't lstat %s", path); + return (ARCHIVE_FAILED); + } + } else +#endif + if (stat(path, &s) != 0) { + archive_set_error(&a->archive, errno, + "Can't stat %s", path); + return (ARCHIVE_FAILED); + } + st = &s; + } + archive_entry_copy_stat(entry, st); + } + + /* Lookup uname/gname */ + name = archive_read_disk_uname(_a, archive_entry_uid(entry)); + if (name != NULL) + archive_entry_copy_uname(entry, name); + name = archive_read_disk_gname(_a, archive_entry_gid(entry)); + if (name != NULL) + archive_entry_copy_gname(entry, name); + +#ifdef HAVE_STRUCT_STAT_ST_FLAGS + /* On FreeBSD, we get flags for free with the stat. */ + /* TODO: Does this belong in copy_stat()? */ + if (st->st_flags != 0) + archive_entry_set_fflags(entry, st->st_flags, 0); +#endif + +#if defined(EXT2_IOC_GETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS) + /* Linux requires an extra ioctl to pull the flags. Although + * this is an extra step, it has a nice side-effect: We get an + * open file descriptor which we can use in the subsequent lookups. */ + if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) { + if (fd < 0) + fd = open(path, O_RDONLY | O_NONBLOCK); + if (fd >= 0) { + unsigned long stflags; + int r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags); + if (r == 0 && stflags != 0) + archive_entry_set_fflags(entry, stflags, 0); + } + } +#endif + +#if defined(HAVE_READLINK) || defined(HAVE_READLINKAT) + if (S_ISLNK(st->st_mode)) { + size_t linkbuffer_len = st->st_size + 1; + char *linkbuffer; + int lnklen; + + linkbuffer = malloc(linkbuffer_len); + if (linkbuffer == NULL) { + archive_set_error(&a->archive, ENOMEM, + "Couldn't read link data"); + return (ARCHIVE_FAILED); + } +#ifdef HAVE_READLINKAT + if (a->entry_wd_fd >= 0) + lnklen = readlinkat(a->entry_wd_fd, path, + linkbuffer, linkbuffer_len); + else +#endif /* HAVE_READLINKAT */ + lnklen = readlink(path, linkbuffer, linkbuffer_len); + if (lnklen < 0) { + archive_set_error(&a->archive, errno, + "Couldn't read link data"); + free(linkbuffer); + return (ARCHIVE_FAILED); + } + linkbuffer[lnklen] = 0; + archive_entry_set_symlink(entry, linkbuffer); + free(linkbuffer); + } +#endif /* HAVE_READLINK || HAVE_READLINKAT */ + + r = setup_acls_posix1e(a, entry, fd); + r1 = setup_xattrs(a, entry, fd); + if (r1 < r) + r = r1; + r1 = setup_mac_metadata(a, entry, fd); + if (r1 < r) + r = r1; + r1 = setup_sparse(a, entry, fd); + if (r1 < r) + r = r1; + + /* If we opened the file earlier in this function, close it. */ + if (initial_fd != fd) + close(fd); + return (r); +} + +#if defined(__APPLE__) && defined(HAVE_COPYFILE_H) +/* + * The Mac OS "copyfile()" API copies the extended metadata for a + * file into a separate file in AppleDouble format (see RFC 1740). + * + * Mac OS tar and cpio implementations store this extended + * metadata as a separate entry just before the regular entry + * with a "._" prefix added to the filename. + * + * Note that this is currently done unconditionally; the tar program has + * an option to discard this information before the archive is written. + * + * TODO: If there's a failure, report it and return ARCHIVE_WARN. + */ +static int +setup_mac_metadata(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + int tempfd = -1; + int copyfile_flags = COPYFILE_NOFOLLOW | COPYFILE_ACL | COPYFILE_XATTR; + struct stat copyfile_stat; + int ret = ARCHIVE_OK; + void *buff; + int have_attrs; + const char *name, *tempdir, *tempfile = NULL; + + name = archive_entry_sourcepath(entry); + if (name == NULL) + name = archive_entry_pathname(entry); + if (name == NULL) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Can't open file to read extended attributes: No name"); + return (ARCHIVE_WARN); + } + + /* Short-circuit if there's nothing to do. */ + have_attrs = copyfile(name, NULL, 0, copyfile_flags | COPYFILE_CHECK); + if (have_attrs == -1) { + archive_set_error(&a->archive, errno, + "Could not check extended attributes"); + return (ARCHIVE_WARN); + } + if (have_attrs == 0) + return (ARCHIVE_OK); + + tempdir = NULL; + if (issetugid() == 0) + tempdir = getenv("TMPDIR"); + if (tempdir == NULL) + tempdir = _PATH_TMP; + tempfile = tempnam(tempdir, "tar.md."); + + /* XXX I wish copyfile() could pack directly to a memory + * buffer; that would avoid the temp file here. For that + * matter, it would be nice if fcopyfile() actually worked, + * that would reduce the many open/close races here. */ + if (copyfile(name, tempfile, 0, copyfile_flags | COPYFILE_PACK)) { + archive_set_error(&a->archive, errno, + "Could not pack extended attributes"); + ret = ARCHIVE_WARN; + goto cleanup; + } + tempfd = open(tempfile, O_RDONLY); + if (tempfd < 0) { + archive_set_error(&a->archive, errno, + "Could not open extended attribute file"); + ret = ARCHIVE_WARN; + goto cleanup; + } + if (fstat(tempfd, ©file_stat)) { + archive_set_error(&a->archive, errno, + "Could not check size of extended attributes"); + ret = ARCHIVE_WARN; + goto cleanup; + } + buff = malloc(copyfile_stat.st_size); + if (buff == NULL) { + archive_set_error(&a->archive, errno, + "Could not allocate memory for extended attributes"); + ret = ARCHIVE_WARN; + goto cleanup; + } + if (copyfile_stat.st_size != read(tempfd, buff, copyfile_stat.st_size)) { + archive_set_error(&a->archive, errno, + "Could not read extended attributes into memory"); + ret = ARCHIVE_WARN; + goto cleanup; + } + archive_entry_copy_mac_metadata(entry, buff, copyfile_stat.st_size); + +cleanup: + if (tempfd >= 0) + close(tempfd); + if (tempfile != NULL) + unlink(tempfile); + return (ret); +} + +#else + +/* + * Stub implementation for non-Mac systems. + */ +static int +setup_mac_metadata(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + (void)a; /* UNUSED */ + (void)entry; /* UNUSED */ + (void)fd; /* UNUSED */ + return (ARCHIVE_OK); +} +#endif + + +#ifdef HAVE_POSIX_ACL +static void setup_acl_posix1e(struct archive_read_disk *a, + struct archive_entry *entry, acl_t acl, int archive_entry_acl_type); + +static int +setup_acls_posix1e(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + const char *accpath; + acl_t acl; + + accpath = archive_entry_sourcepath(entry); + if (accpath == NULL) + accpath = archive_entry_pathname(entry); + + archive_entry_acl_clear(entry); + + /* Retrieve access ACL from file. */ + if (fd >= 0) + acl = acl_get_fd(fd); +#if HAVE_ACL_GET_LINK_NP + else if (!a->follow_symlinks) + acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS); +#else + else if ((!a->follow_symlinks) + && (archive_entry_filetype(entry) == AE_IFLNK)) + /* We can't get the ACL of a symlink, so we assume it can't + have one. */ + acl = NULL; +#endif + else + acl = acl_get_file(accpath, ACL_TYPE_ACCESS); + if (acl != NULL) { + setup_acl_posix1e(a, entry, acl, + ARCHIVE_ENTRY_ACL_TYPE_ACCESS); + acl_free(acl); + } + + /* Only directories can have default ACLs. */ + if (S_ISDIR(archive_entry_mode(entry))) { + acl = acl_get_file(accpath, ACL_TYPE_DEFAULT); + if (acl != NULL) { + setup_acl_posix1e(a, entry, acl, + ARCHIVE_ENTRY_ACL_TYPE_DEFAULT); + acl_free(acl); + } + } + return (ARCHIVE_OK); +} + +/* + * Translate POSIX.1e ACL into libarchive internal structure. + */ +static void +setup_acl_posix1e(struct archive_read_disk *a, + struct archive_entry *entry, acl_t acl, int archive_entry_acl_type) +{ + acl_tag_t acl_tag; + acl_entry_t acl_entry; + acl_permset_t acl_permset; + int s, ae_id, ae_tag, ae_perm; + const char *ae_name; + + s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry); + while (s == 1) { + ae_id = -1; + ae_name = NULL; + + acl_get_tag_type(acl_entry, &acl_tag); + if (acl_tag == ACL_USER) { + ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry); + ae_name = archive_read_disk_uname(&a->archive, ae_id); + ae_tag = ARCHIVE_ENTRY_ACL_USER; + } else if (acl_tag == ACL_GROUP) { + ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry); + ae_name = archive_read_disk_gname(&a->archive, ae_id); + ae_tag = ARCHIVE_ENTRY_ACL_GROUP; + } else if (acl_tag == ACL_MASK) { + ae_tag = ARCHIVE_ENTRY_ACL_MASK; + } else if (acl_tag == ACL_USER_OBJ) { + ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ; + } else if (acl_tag == ACL_GROUP_OBJ) { + ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ; + } else if (acl_tag == ACL_OTHER) { + ae_tag = ARCHIVE_ENTRY_ACL_OTHER; + } else { + /* Skip types that libarchive can't support. */ + continue; + } + + acl_get_permset(acl_entry, &acl_permset); + ae_perm = 0; + /* + * acl_get_perm() is spelled differently on different + * platforms; see above. + */ + if (ACL_GET_PERM(acl_permset, ACL_EXECUTE)) + ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE; + if (ACL_GET_PERM(acl_permset, ACL_READ)) + ae_perm |= ARCHIVE_ENTRY_ACL_READ; + if (ACL_GET_PERM(acl_permset, ACL_WRITE)) + ae_perm |= ARCHIVE_ENTRY_ACL_WRITE; + + archive_entry_acl_add_entry(entry, + archive_entry_acl_type, ae_perm, ae_tag, + ae_id, ae_name); + + s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry); + } +} +#else +static int +setup_acls_posix1e(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + (void)a; /* UNUSED */ + (void)entry; /* UNUSED */ + (void)fd; /* UNUSED */ + return (ARCHIVE_OK); +} +#endif + +#if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \ + HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \ + (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA) + +/* + * Linux and AIX extended attribute support. + * + * TODO: By using a stack-allocated buffer for the first + * call to getxattr(), we might be able to avoid the second + * call entirely. We only need the second call if the + * stack-allocated buffer is too small. But a modest buffer + * of 1024 bytes or so will often be big enough. Same applies + * to listxattr(). + */ + + +static int +setup_xattr(struct archive_read_disk *a, + struct archive_entry *entry, const char *name, int fd) +{ + ssize_t size; + void *value = NULL; + const char *accpath; + + accpath = archive_entry_sourcepath(entry); + if (accpath == NULL) + accpath = archive_entry_pathname(entry); + +#if HAVE_FGETXATTR + if (fd >= 0) + size = fgetxattr(fd, name, NULL, 0); + else if (!a->follow_symlinks) + size = lgetxattr(accpath, name, NULL, 0); + else + size = getxattr(accpath, name, NULL, 0); +#elif HAVE_FGETEA + if (fd >= 0) + size = fgetea(fd, name, NULL, 0); + else if (!a->follow_symlinks) + size = lgetea(accpath, name, NULL, 0); + else + size = getea(accpath, name, NULL, 0); +#endif + + if (size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't query extended attribute"); + return (ARCHIVE_WARN); + } + + if (size > 0 && (value = malloc(size)) == NULL) { + archive_set_error(&a->archive, errno, "Out of memory"); + return (ARCHIVE_FATAL); + } + +#if HAVE_FGETXATTR + if (fd >= 0) + size = fgetxattr(fd, name, value, size); + else if (!a->follow_symlinks) + size = lgetxattr(accpath, name, value, size); + else + size = getxattr(accpath, name, value, size); +#elif HAVE_FGETEA + if (fd >= 0) + size = fgetea(fd, name, value, size); + else if (!a->follow_symlinks) + size = lgetea(accpath, name, value, size); + else + size = getea(accpath, name, value, size); +#endif + + if (size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't read extended attribute"); + return (ARCHIVE_WARN); + } + + archive_entry_xattr_add_entry(entry, name, value, size); + + free(value); + return (ARCHIVE_OK); +} + +static int +setup_xattrs(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + char *list, *p; + const char *path; + ssize_t list_size; + + path = archive_entry_sourcepath(entry); + if (path == NULL) + path = archive_entry_pathname(entry); + +#if HAVE_FLISTXATTR + if (fd >= 0) + list_size = flistxattr(fd, NULL, 0); + else if (!a->follow_symlinks) + list_size = llistxattr(path, NULL, 0); + else + list_size = listxattr(path, NULL, 0); +#elif HAVE_FLISTEA + if (fd >= 0) + list_size = flistea(fd, NULL, 0); + else if (!a->follow_symlinks) + list_size = llistea(path, NULL, 0); + else + list_size = listea(path, NULL, 0); +#endif + + if (list_size == -1) { + if (errno == ENOTSUP || errno == ENOSYS) + return (ARCHIVE_OK); + archive_set_error(&a->archive, errno, + "Couldn't list extended attributes"); + return (ARCHIVE_WARN); + } + + if (list_size == 0) + return (ARCHIVE_OK); + + if ((list = malloc(list_size)) == NULL) { + archive_set_error(&a->archive, errno, "Out of memory"); + return (ARCHIVE_FATAL); + } + +#if HAVE_FLISTXATTR + if (fd >= 0) + list_size = flistxattr(fd, list, list_size); + else if (!a->follow_symlinks) + list_size = llistxattr(path, list, list_size); + else + list_size = listxattr(path, list, list_size); +#elif HAVE_FLISTEA + if (fd >= 0) + list_size = flistea(fd, list, list_size); + else if (!a->follow_symlinks) + list_size = llistea(path, list, list_size); + else + list_size = listea(path, list, list_size); +#endif + + if (list_size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't retrieve extended attributes"); + free(list); + return (ARCHIVE_WARN); + } + + for (p = list; (p - list) < list_size; p += strlen(p) + 1) { + if (strncmp(p, "system.", 7) == 0 || + strncmp(p, "xfsroot.", 8) == 0) + continue; + setup_xattr(a, entry, p, fd); + } + + free(list); + return (ARCHIVE_OK); +} + +#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \ + HAVE_DECL_EXTATTR_NAMESPACE_USER + +/* + * FreeBSD extattr interface. + */ + +/* TODO: Implement this. Follow the Linux model above, but + * with FreeBSD-specific system calls, of course. Be careful + * to not include the system extattrs that hold ACLs; we handle + * those separately. + */ +static int +setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, + int namespace, const char *name, const char *fullname, int fd); + +static int +setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, + int namespace, const char *name, const char *fullname, int fd) +{ + ssize_t size; + void *value = NULL; + const char *accpath; + + accpath = archive_entry_sourcepath(entry); + if (accpath == NULL) + accpath = archive_entry_pathname(entry); + + if (fd >= 0) + size = extattr_get_fd(fd, namespace, name, NULL, 0); + else if (!a->follow_symlinks) + size = extattr_get_link(accpath, namespace, name, NULL, 0); + else + size = extattr_get_file(accpath, namespace, name, NULL, 0); + + if (size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't query extended attribute"); + return (ARCHIVE_WARN); + } + + if (size > 0 && (value = malloc(size)) == NULL) { + archive_set_error(&a->archive, errno, "Out of memory"); + return (ARCHIVE_FATAL); + } + + if (fd >= 0) + size = extattr_get_fd(fd, namespace, name, value, size); + else if (!a->follow_symlinks) + size = extattr_get_link(accpath, namespace, name, value, size); + else + size = extattr_get_file(accpath, namespace, name, value, size); + + if (size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't read extended attribute"); + return (ARCHIVE_WARN); + } + + archive_entry_xattr_add_entry(entry, fullname, value, size); + + free(value); + return (ARCHIVE_OK); +} + +static int +setup_xattrs(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + char buff[512]; + char *list, *p; + ssize_t list_size; + const char *path; + int namespace = EXTATTR_NAMESPACE_USER; + + path = archive_entry_sourcepath(entry); + if (path == NULL) + path = archive_entry_pathname(entry); + + if (fd >= 0) + list_size = extattr_list_fd(fd, namespace, NULL, 0); + else if (!a->follow_symlinks) + list_size = extattr_list_link(path, namespace, NULL, 0); + else + list_size = extattr_list_file(path, namespace, NULL, 0); + + if (list_size == -1 && errno == EOPNOTSUPP) + return (ARCHIVE_OK); + if (list_size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't list extended attributes"); + return (ARCHIVE_WARN); + } + + if (list_size == 0) + return (ARCHIVE_OK); + + if ((list = malloc(list_size)) == NULL) { + archive_set_error(&a->archive, errno, "Out of memory"); + return (ARCHIVE_FATAL); + } + + if (fd >= 0) + list_size = extattr_list_fd(fd, namespace, list, list_size); + else if (!a->follow_symlinks) + list_size = extattr_list_link(path, namespace, list, list_size); + else + list_size = extattr_list_file(path, namespace, list, list_size); + + if (list_size == -1) { + archive_set_error(&a->archive, errno, + "Couldn't retrieve extended attributes"); + free(list); + return (ARCHIVE_WARN); + } + + p = list; + while ((p - list) < list_size) { + size_t len = 255 & (int)*p; + char *name; + + strcpy(buff, "user."); + name = buff + strlen(buff); + memcpy(name, p + 1, len); + name[len] = '\0'; + setup_xattr(a, entry, namespace, name, buff, fd); + p += 1 + len; + } + + free(list); + return (ARCHIVE_OK); +} + +#else + +/* + * Generic (stub) extended attribute support. + */ +static int +setup_xattrs(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + (void)a; /* UNUSED */ + (void)entry; /* UNUSED */ + (void)fd; /* UNUSED */ + return (ARCHIVE_OK); +} + +#endif + +#if defined(HAVE_LINUX_FIEMAP_H) + +/* + * Linux sparse interface. + * + * The FIEMAP ioctl returns an "extent" for each physical allocation + * on disk. We need to process those to generate a more compact list + * of logical file blocks. We also need to be very careful to use + * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes + * does not report allocations for newly-written data that hasn't + * been synced to disk. + * + * It's important to return a minimal sparse file list because we want + * to not trigger sparse file extensions if we don't have to, since + * not all readers support them. + */ + +static int +setup_sparse(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + char buff[4096]; + struct fiemap *fm; + struct fiemap_extent *fe; + int64_t size; + int count, do_fiemap; + int initial_fd = fd; + int exit_sts = ARCHIVE_OK; + + if (archive_entry_filetype(entry) != AE_IFREG + || archive_entry_size(entry) <= 0 + || archive_entry_hardlink(entry) != NULL) + return (ARCHIVE_OK); + + if (fd < 0) { + const char *path; + + path = archive_entry_sourcepath(entry); + if (path == NULL) + path = archive_entry_pathname(entry); + fd = open(path, O_RDONLY | O_NONBLOCK); + if (fd < 0) { + archive_set_error(&a->archive, errno, + "Can't open `%s'", path); + return (ARCHIVE_FAILED); + } + } + + count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe); + fm = (struct fiemap *)buff; + fm->fm_start = 0; + fm->fm_length = ~0ULL;; + fm->fm_flags = FIEMAP_FLAG_SYNC; + fm->fm_extent_count = count; + do_fiemap = 1; + size = archive_entry_size(entry); + for (;;) { + int i, r; + + r = ioctl(fd, FS_IOC_FIEMAP, fm); + if (r < 0) { + /* When errno is ENOTTY, it is better we should + * return ARCHIVE_OK because an earlier version + *(<2.6.28) cannot perfom FS_IOC_FIEMAP. + * We should also check if errno is EOPNOTSUPP, + * it means "Operation not supported". */ + if (errno != ENOTTY && errno != EOPNOTSUPP) { + archive_set_error(&a->archive, errno, + "FIEMAP failed"); + exit_sts = ARCHIVE_FAILED; + } + goto exit_setup_sparse; + } + if (fm->fm_mapped_extents == 0) + break; + fe = fm->fm_extents; + for (i = 0; i < fm->fm_mapped_extents; i++, fe++) { + if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) { + /* The fe_length of the last block does not + * adjust itself to its size files. */ + int64_t length = fe->fe_length; + if (fe->fe_logical + length > size) + length -= fe->fe_logical + length - size; + if (fe->fe_logical == 0 && length == size) { + /* This is not sparse. */ + do_fiemap = 0; + break; + } + if (length > 0) + archive_entry_sparse_add_entry(entry, + fe->fe_logical, length); + } + if (fe->fe_flags & FIEMAP_EXTENT_LAST) + do_fiemap = 0; + } + if (do_fiemap) { + fe = fm->fm_extents + fm->fm_mapped_extents -1; + fm->fm_start = fe->fe_logical + fe->fe_length; + } else + break; + } +exit_setup_sparse: + if (initial_fd != fd) + close(fd); + return (exit_sts); +} + +#elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE) + +/* + * FreeBSD and Solaris sparse interface. + */ + +static int +setup_sparse(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + int64_t size; + int initial_fd = fd; + off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */ + off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */ + int exit_sts = ARCHIVE_OK; + + if (archive_entry_filetype(entry) != AE_IFREG + || archive_entry_size(entry) <= 0 + || archive_entry_hardlink(entry) != NULL) + return (ARCHIVE_OK); + + /* Does filesystem support the reporting of hole ? */ + if (fd >= 0) { + if (fpathconf(fd, _PC_MIN_HOLE_SIZE) <= 0) + return (ARCHIVE_OK); + initial_off = lseek(fd, 0, SEEK_CUR); + if (initial_off != 0) + lseek(fd, 0, SEEK_SET); + } else { + const char *path; + + path = archive_entry_sourcepath(entry); + if (path == NULL) + path = archive_entry_pathname(entry); + if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0) + return (ARCHIVE_OK); + fd = open(path, O_RDONLY | O_NONBLOCK); + if (fd < 0) { + archive_set_error(&a->archive, errno, + "Can't open `%s'", path); + return (ARCHIVE_FAILED); + } + initial_off = 0; + } + + off_s = 0; + size = archive_entry_size(entry); + while (off_s < size) { + off_s = lseek(fd, off_s, SEEK_DATA); + if (off_s == (off_t)-1) { + if (errno == ENXIO) + break;/* no more hole */ + archive_set_error(&a->archive, errno, + "lseek(SEEK_HOLE) failed"); + exit_sts = ARCHIVE_FAILED; + goto exit_setup_sparse; + } + off_e = lseek(fd, off_s, SEEK_HOLE); + if (off_s == (off_t)-1) { + if (errno == ENXIO) { + off_e = lseek(fd, 0, SEEK_END); + if (off_e != (off_t)-1) + break;/* no more data */ + } + archive_set_error(&a->archive, errno, + "lseek(SEEK_DATA) failed"); + exit_sts = ARCHIVE_FAILED; + goto exit_setup_sparse; + } + if (off_s == 0 && off_e == size) + break;/* This is not spase. */ + archive_entry_sparse_add_entry(entry, off_s, + off_e - off_s); + off_s = off_e; + } +exit_setup_sparse: + if (initial_fd != fd) + close(fd); + else + lseek(fd, initial_off, SEEK_SET); + return (exit_sts); +} + +#else + +/* + * Generic (stub) sparse support. + */ +static int +setup_sparse(struct archive_read_disk *a, + struct archive_entry *entry, int fd) +{ + (void)a; /* UNUSED */ + (void)entry; /* UNUSED */ + (void)fd; /* UNUSED */ + return (ARCHIVE_OK); +} + +#endif + +#endif /* !defined(_WIN32) || defined(__CYGWIN__) */ + |