/*- * Copyright (c) 2003-2009 Tim Kientzle * 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("$FreeBSD$"); #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_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_ACL_LIBACL_H #include <acl/libacl.h> #endif #ifdef HAVE_ATTR_XATTR_H #include <attr/xattr.h> #endif #ifdef HAVE_ERRNO_H #include <errno.h> #endif #ifdef HAVE_LIMITS_H #include <limits.h> #endif #ifdef HAVE_WINDOWS_H #include <windows.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_xattrs(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); #ifdef 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(pathname, O_RDONLY | O_NONBLOCK | O_BINARY); 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 (st == NULL) { /* TODO: On Windows, use GetFileInfoByHandle() here. * Using Windows stat() call is badly broken, but * even the stat() wrapper has problems because * 'struct stat' is broken on Windows. */ #if HAVE_FSTAT if (fd >= 0) { if (fstat(fd, &s) != 0) return (ARCHIVE_FATAL); } else #endif #if HAVE_LSTAT if (!a->follow_symlinks) { if (lstat(path, &s) != 0) return (ARCHIVE_FATAL); } else #endif if (stat(path, &s) != 0) return (ARCHIVE_FATAL); 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 #ifdef HAVE_READLINK if (S_ISLNK(st->st_mode)) { char linkbuffer[PATH_MAX + 1]; int lnklen = readlink(path, linkbuffer, PATH_MAX); if (lnklen < 0) { archive_set_error(&a->archive, errno, "Couldn't read link data"); return (ARCHIVE_WARN); } linkbuffer[lnklen] = 0; archive_entry_set_symlink(entry, linkbuffer); } #endif r = setup_acls_posix1e(a, entry, fd); r1 = setup_xattrs(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); } #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); #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_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR /* * Linux 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; (void)fd; /* UNUSED */ accpath = archive_entry_sourcepath(entry); if (accpath == NULL) accpath = archive_entry_pathname(entry); if (!a->follow_symlinks) size = lgetxattr(accpath, name, NULL, 0); else size = getxattr(accpath, 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 (!a->follow_symlinks) size = lgetxattr(accpath, name, value, size); else size = getxattr(accpath, 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, 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 (!a->follow_symlinks) list_size = llistxattr(path, NULL, 0); else list_size = listxattr(path, NULL, 0); if (list_size == -1) { if (errno == ENOTSUP) 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 (!a->follow_symlinks) list_size = llistxattr(path, list, list_size); else list_size = listxattr(path, list, list_size); 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 /* * 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. */ int setup_xattr(struct archive_read_disk *a, struct archive_entry *entry, int namespace, const char *name, const char *fullname, int fd); 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; (void)fd; /* UNUSED */ accpath = archive_entry_sourcepath(entry); if (accpath == NULL) accpath = archive_entry_pathname(entry); 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 (!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 (!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 (!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