Source / Include Folder (#88)

Moved Source Files Into `src` Folder

1 files changed, 0 insertions, 392 deletions

diff --git a/fsade.c b/fsade.c
deleted file mode 100644
index 1444cf4..0000000
--- a/fsade.c
+++ /dev/null
@@ -1,392 +0,0 @@
-/****************************************************************************
- * bfs                                                                      *
- * Copyright (C) 2019-2021 Tavian Barnes <tavianator@tavianator.com>        *
- *                                                                          *
- * Permission to use, copy, modify, and/or distribute this software for any *
- * purpose with or without fee is hereby granted.                           *
- *                                                                          *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
- ****************************************************************************/
-
-#include "fsade.h"
-#include "bftw.h"
-#include "dir.h"
-#include "dstring.h"
-#include "util.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <unistd.h>
-
-#if BFS_CAN_CHECK_ACL
-#	include <sys/acl.h>
-#endif
-
-#if BFS_CAN_CHECK_CAPABILITIES
-#	include <sys/capability.h>
-#endif
-
-#if BFS_HAS_SYS_EXTATTR
-#	include <sys/extattr.h>
-#elif BFS_HAS_SYS_XATTR
-#	include <sys/xattr.h>
-#endif
-
-#if BFS_CAN_CHECK_ACL || BFS_CAN_CHECK_CAPABILITIES || BFS_CAN_CHECK_XATTRS
-
-/**
- * Many of the APIs used here don't have *at() variants, but we can try to
- * emulate something similar if /proc/self/fd is available.
- */
-static const char *fake_at(const struct BFTW *ftwbuf) {
-	static bool proc_works = true;
-	static bool proc_checked = false;
-
-	char *path = NULL;
-	if (!proc_works || ftwbuf->at_fd == AT_FDCWD) {
-		goto fail;
-	}
-
-	path = dstrprintf("/proc/self/fd/%d/", ftwbuf->at_fd);
-	if (!path) {
-		goto fail;
-	}
-
-	if (!proc_checked) {
-		proc_checked = true;
-		if (xfaccessat(AT_FDCWD, path, F_OK) != 0) {
-			proc_works = false;
-			goto fail;
-		}
-	}
-
-	if (dstrcat(&path, ftwbuf->at_path) != 0) {
-		goto fail;
-	}
-
-	return path;
-
-fail:
-	dstrfree(path);
-	return ftwbuf->path;
-}
-
-static void free_fake_at(const struct BFTW *ftwbuf, const char *path) {
-	if (path != ftwbuf->path) {
-		dstrfree((char *)path);
-	}
-}
-
-/**
- * Check if an error was caused by the absence of support or data for a feature.
- */
-static bool is_absence_error(int error) {
-	// If the OS doesn't support the feature, it's obviously not enabled for
-	// any files
-	if (error == ENOTSUP) {
-		return true;
-	}
-
-	// On Linux, ACLs and capabilities are implemented in terms of extended
-	// attributes, which report ENODATA/ENOATTR when missing
-
-#ifdef ENODATA
-	if (error == ENODATA) {
-		return true;
-	}
-#endif
-
-#if defined(ENOATTR) && ENOATTR != ENODATA
-	if (error == ENOATTR) {
-		return true;
-	}
-#endif
-
-	// On at least FreeBSD and macOS, EINVAL is returned when the requested
-	// ACL type is not supported for that file
-	if (error == EINVAL) {
-		return true;
-	}
-
-#if __APPLE__
-	// On macOS, ENOENT can also signal that a file has no ACLs
-	if (error == ENOENT) {
-		return true;
-	}
-#endif
-
-	return false;
-}
-
-#endif // BFS_CAN_CHECK_ACL || BFS_CAN_CHECK_CAPABILITIES || BFS_CAN_CHECK_XATTRS
-
-#if BFS_CAN_CHECK_ACL
-
-/** Check if a POSIX.1e ACL is non-trivial. */
-static int bfs_check_posix1e_acl(acl_t acl, bool ignore_required) {
-	int ret = 0;
-
-	acl_entry_t entry;
-	for (int status = acl_get_entry(acl, ACL_FIRST_ENTRY, &entry);
-#if __APPLE__
-	     // POSIX.1e specifies a return value of 1 for success, but macOS
-	     // returns 0 instead
-	     status == 0;
-#else
-	     status > 0;
-#endif
-	     status = acl_get_entry(acl, ACL_NEXT_ENTRY, &entry)) {
-#if defined(ACL_USER_OBJ) && defined(ACL_GROUP_OBJ) && defined(ACL_OTHER)
-		if (ignore_required) {
-			acl_tag_t tag;
-			if (acl_get_tag_type(entry, &tag) != 0) {
-				ret = -1;
-				continue;
-			}
-			if (tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ || tag == ACL_OTHER) {
-				continue;
-			}
-		}
-#endif
-
-		ret = 1;
-		break;
-	}
-
-	return ret;
-}
-
-/** Check if an ACL of the given type is non-trivial. */
-static int bfs_check_acl_type(acl_t acl, acl_type_t type) {
-	if (type == ACL_TYPE_DEFAULT) {
-		// For directory default ACLs, any entries make them non-trivial
-		return bfs_check_posix1e_acl(acl, false);
-	}
-
-#if __FreeBSD__
-	int trivial;
-
-#if BFS_HAS_FEATURE(memory_sanitizer, false)
-        // msan seems to be missing an interceptor for acl_is_trivial_np()
-        trivial = 0;
-#endif
-
-	if (acl_is_trivial_np(acl, &trivial) < 0) {
-		return -1;
-	} else if (trivial) {
-		return 0;
-	} else {
-		return 1;
-	}
-#else // !__FreeBSD__
-	return bfs_check_posix1e_acl(acl, true);
-#endif
-}
-
-int bfs_check_acl(const struct BFTW *ftwbuf) {
-	static const acl_type_t acl_types[] = {
-#if __APPLE__
-		// macOS gives EINVAL for either of the two standard ACL types,
-		// supporting only ACL_TYPE_EXTENDED
-		ACL_TYPE_EXTENDED,
-#else
-		// The two standard POSIX.1e ACL types
-		ACL_TYPE_ACCESS,
-		ACL_TYPE_DEFAULT,
-#endif
-
-#ifdef ACL_TYPE_NFS4
-		ACL_TYPE_NFS4,
-#endif
-	};
-	static const size_t n_acl_types = sizeof(acl_types)/sizeof(acl_types[0]);
-
-	if (ftwbuf->type == BFS_LNK) {
-		return 0;
-	}
-
-	const char *path = fake_at(ftwbuf);
-
-	int ret = -1, error = 0;
-	for (size_t i = 0; i < n_acl_types && ret <= 0; ++i) {
-		acl_type_t type = acl_types[i];
-
-		if (type == ACL_TYPE_DEFAULT && ftwbuf->type != BFS_DIR) {
-			// ACL_TYPE_DEFAULT is supported only for directories,
-			// otherwise acl_get_file() gives EACCESS
-			continue;
-		}
-
-		acl_t acl = acl_get_file(path, type);
-		if (!acl) {
-			error = errno;
-			if (is_absence_error(error)) {
-				ret = 0;
-			}
-			continue;
-		}
-
-		ret = bfs_check_acl_type(acl, type);
-		error = errno;
-		acl_free(acl);
-	}
-
-	free_fake_at(ftwbuf, path);
-	errno = error;
-	return ret;
-}
-
-#else // !BFS_CAN_CHECK_ACL
-
-int bfs_check_acl(const struct BFTW *ftwbuf) {
-	errno = ENOTSUP;
-	return -1;
-}
-
-#endif
-
-#if BFS_CAN_CHECK_CAPABILITIES
-
-int bfs_check_capabilities(const struct BFTW *ftwbuf) {
-	if (ftwbuf->type == BFS_LNK) {
-		return 0;
-	}
-
-	int ret = -1, error;
-	const char *path = fake_at(ftwbuf);
-
-	cap_t caps = cap_get_file(path);
-	if (!caps) {
-		error = errno;
-		if (is_absence_error(error)) {
-			ret = 0;
-		}
-		goto out_path;
-	}
-
-	// TODO: Any better way to check for a non-empty capability set?
-	char *text = cap_to_text(caps, NULL);
-	if (!text) {
-		error = errno;
-		goto out_caps;
-	}
-	ret = text[0] ? 1 : 0;
-
-	error = errno;
-	cap_free(text);
-out_caps:
-	cap_free(caps);
-out_path:
-	free_fake_at(ftwbuf, path);
-	errno = error;
-	return ret;
-}
-
-#else // !BFS_CAN_CHECK_CAPABILITIES
-
-int bfs_check_capabilities(const struct BFTW *ftwbuf) {
-	errno = ENOTSUP;
-	return -1;
-}
-
-#endif
-
-#if BFS_CAN_CHECK_XATTRS
-
-int bfs_check_xattrs(const struct BFTW *ftwbuf) {
-	const char *path = fake_at(ftwbuf);
-	ssize_t len;
-
-#if BFS_HAS_SYS_EXTATTR
-	ssize_t (*extattr_list)(const char *, int, void*, size_t) =
-		ftwbuf->type == BFS_LNK ? extattr_list_link : extattr_list_file;
-
-	len = extattr_list(path, EXTATTR_NAMESPACE_SYSTEM, NULL, 0);
-	if (len <= 0) {
-		len = extattr_list(path, EXTATTR_NAMESPACE_USER, NULL, 0);
-	}
-#elif __APPLE__
-	int options = ftwbuf->type == BFS_LNK ? XATTR_NOFOLLOW : 0;
-	len = listxattr(path, NULL, 0, options);
-#else
-	if (ftwbuf->type == BFS_LNK) {
-		len = llistxattr(path, NULL, 0);
-	} else {
-		len = listxattr(path, NULL, 0);
-	}
-#endif
-
-	int error = errno;
-
-	free_fake_at(ftwbuf, path);
-
-	if (len > 0) {
-		return 1;
-	} else if (len == 0 || is_absence_error(error)) {
-		return 0;
-	} else if (error == E2BIG) {
-		return 1;
-	} else {
-		errno = error;
-		return -1;
-	}
-}
-
-int bfs_check_xattr_named(const struct BFTW *ftwbuf, const char *name) {
-	const char *path = fake_at(ftwbuf);
-	ssize_t len;
-
-#if BFS_HAS_SYS_EXTATTR
-	ssize_t (*extattr_get)(const char *, int, const char *, void*, size_t) =
-		ftwbuf->type == BFS_LNK ? extattr_get_link : extattr_get_file;
-
-	len = extattr_get(path, EXTATTR_NAMESPACE_SYSTEM, name, NULL, 0);
-	if (len < 0) {
-		len = extattr_get(path, EXTATTR_NAMESPACE_USER, name, NULL, 0);
-	}
-#elif __APPLE__
-	int options = ftwbuf->type == BFS_LNK ? XATTR_NOFOLLOW : 0;
-	len = getxattr(path, name, NULL, 0, 0, options);
-#else
-	if (ftwbuf->type == BFS_LNK) {
-		len = lgetxattr(path, name, NULL, 0);
-	} else {
-		len = getxattr(path, name, NULL, 0);
-	}
-#endif
-
-	int error = errno;
-
-	free_fake_at(ftwbuf, path);
-
-	if (len >= 0) {
-		return 1;
-	} else if (is_absence_error(error)) {
-		return 0;
-	} else if (error == E2BIG) {
-		return 1;
-	} else {
-		errno = error;
-		return -1;
-	}
-}
-
-#else // !BFS_CAN_CHECK_XATTRS
-
-int bfs_check_xattrs(const struct BFTW *ftwbuf) {
-	errno = ENOTSUP;
-	return -1;
-}
-
-int bfs_check_xattr_named(const struct BFTW *ftwbuf, const char *name) {
-	errno = ENOTSUP;
-	return -1;
-}
-
-#endif