--- embedaddon/rsync/syscall.c	2013/07/22 00:20:21	1.1.1.1.2.1
+++ embedaddon/rsync/syscall.c	2021/03/17 00:32:36	1.1.1.4
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 1998 Andrew Tridgell
  * Copyright (C) 2002 Martin Pool
- * Copyright (C) 2003-2009 Wayne Davison
+ * Copyright (C) 2003-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -29,13 +29,43 @@
 #include <sys/attr.h>
 #endif
 
+#if defined HAVE_SYS_FALLOCATE && !defined HAVE_FALLOCATE
+#include <sys/syscall.h>
+#endif
+
 extern int dry_run;
 extern int am_root;
+extern int am_sender;
 extern int read_only;
 extern int list_only;
+extern int force_change;
+extern int inplace;
+extern int preallocate_files;
 extern int preserve_perms;
 extern int preserve_executability;
+extern int open_noatime;
 
+int direct_io = 0;
+
+#ifndef S_BLKSIZE
+# if defined hpux || defined __hpux__ || defined __hpux
+#  define S_BLKSIZE 1024
+# elif defined _AIX && defined _I386
+#  define S_BLKSIZE 4096
+# else
+#  define S_BLKSIZE 512
+# endif
+#endif
+
+#ifdef SUPPORT_CRTIMES
+#pragma pack(push, 4)
+struct create_time {
+	uint32 length;
+	struct timespec crtime;
+};
+#pragma pack(pop)
+#endif
+
 #define RETURN_ERROR_IF(x,e) \
 	do { \
 		if (x) { \
@@ -50,33 +80,174 @@ int do_unlink(const char *fname)
 {
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
-	return unlink(fname);
+	if (unlink(fname) == 0)
+		return 0;
+#ifdef SUPPORT_FORCE_CHANGE
+	if (force_change && errno == EPERM) {
+		STRUCT_STAT st;
+
+		if (x_lstat(fname, &st, NULL) == 0
+		 && make_mutable(fname, st.st_mode, st.st_flags, force_change) > 0) {
+			if (unlink(fname) == 0)
+				return 0;
+			undo_make_mutable(fname, st.st_flags);
+		}
+		/* TODO: handle immutable directories */
+		errno = EPERM;
+	}
+#endif
+	return -1;
 }
 
-int do_symlink(const char *fname1, const char *fname2)
+#ifdef SUPPORT_LINKS
+int do_symlink(const char *lnk, const char *fname)
 {
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
-	return symlink(fname1, fname2);
+
+#if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS
+	/* For --fake-super, we create a normal file with mode 0600
+	 * and write the lnk into it. */
+	if (am_root < 0) {
+		int ok, len = strlen(lnk);
+		int flags = O_WRONLY|O_CREAT|O_TRUNC;
+
+		if (direct_io)
+			flags |= O_DIRECT;
+
+		int fd = open(fname, flags, S_IWUSR|S_IRUSR);
+		if (fd < 0)
+			return -1;
+		ok = write(fd, lnk, len) == len;
+		if (close(fd) < 0)
+			ok = 0;
+		return ok ? 0 : -1;
+	}
+#endif
+
+	return symlink(lnk, fname);
 }
 
-#ifdef HAVE_LINK
-int do_link(const char *fname1, const char *fname2)
+#if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS
+ssize_t do_readlink(const char *path, char *buf, size_t bufsiz)
 {
+	/* For --fake-super, we read the link from the file. */
+	if (am_root < 0) {
+		int fd = do_open_nofollow(path, O_RDONLY);
+		if (fd >= 0) {
+			int len = read(fd, buf, bufsiz);
+			close(fd);
+			return len;
+		}
+		if (errno != ELOOP)
+			return -1;
+		/* A real symlink needs to be turned into a fake one on the receiving
+		 * side, so tell the generator that the link has no length. */
+		if (!am_sender)
+			return 0;
+		/* Otherwise fall through and let the sender report the real length. */
+	}
+
+	return readlink(path, buf, bufsiz);
+}
+#endif
+#endif
+
+#if defined HAVE_LINK || defined HAVE_LINKAT
+int do_link(const char *old_path, const char *new_path)
+{
+	int st;
+
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
-	return link(fname1, fname2);
+#ifdef HAVE_LINKAT
+	st = linkat(AT_FDCWD, old_path, AT_FDCWD, new_path, 0);
+#else
+	st = link(old_path, new_path);
+#endif
+	if (/*soften_links &&*/ st != 0 && errno == EXDEV)
+		st = symlink(old_path, new_path);
+	return st;
 }
 #endif
 
-int do_lchown(const char *path, uid_t owner, gid_t group)
+int do_clone(const char *old_path, const char *new_path, mode_t mode)
 {
+#ifdef FICLONE
+	int ifd, ofd, ret, save_errno;
+
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
+
+	if ((ifd = do_open(old_path, O_RDONLY, 0)) < 0) {
+		save_errno = errno;
+		rsyserr(FERROR_XFER, errno, "open %s", full_fname(old_path));
+		errno = save_errno;
+		return -1;
+	}
+
+	if (robust_unlink(new_path) && errno != ENOENT) {
+		save_errno = errno;
+		rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(new_path));
+		close(ifd);
+		errno = save_errno;
+		return -1;
+	}
+
+	mode &= INITACCESSPERMS;
+	if ((ofd = do_open(new_path, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
+		save_errno = errno;
+		rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(new_path));
+		close(ifd);
+		errno = save_errno;
+		return -1;
+	}
+
+	ret = ioctl(ofd, FICLONE, ifd);
+	save_errno = errno;
+	close(ifd);
+	close(ofd);
+	if (ret < 0)
+		unlink(new_path);
+	errno = save_errno;
+	return ret;
+#else
+	(void)old_path;
+	(void)new_path;
+	errno = ENOTSUP;
+	return -1;
+#endif
+}
+
+int do_lchown(const char *path, uid_t owner, gid_t group, UNUSED(mode_t mode), UNUSED(uint32 fileflags))
+{
+	if (dry_run) return 0;
+	RETURN_ERROR_IF_RO_OR_LO;
 #ifndef HAVE_LCHOWN
 #define lchown chown
 #endif
-	return lchown(path, owner, group);
+	if (lchown(path, owner, group) == 0)
+		return 0;
+#ifdef SUPPORT_FORCE_CHANGE
+	if (force_change && errno == EPERM) {
+		if (fileflags == NO_FFLAGS) {
+			STRUCT_STAT st;
+			if (x_lstat(path, &st, NULL) == 0) {
+				mode = st.st_mode;
+				fileflags = st.st_flags;
+			}
+		}
+		if (fileflags != NO_FFLAGS
+		 && make_mutable(path, mode, fileflags, force_change) > 0) {
+			int ret = lchown(path, owner, group);
+			undo_make_mutable(path, fileflags);
+			if (ret == 0)
+				return 0;
+		}
+		errno = EPERM;
+	}
+#endif
+	return -1;
 }
 
 int do_mknod(const char *pathname, mode_t mode, dev_t dev)
@@ -100,23 +271,23 @@ int do_mknod(const char *pathname, mode_t mode, dev_t 
 	if (S_ISSOCK(mode)) {
 		int sock;
 		struct sockaddr_un saddr;
+		unsigned int len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
+		if (len >= sizeof saddr.sun_path) {
+			errno = ENAMETOOLONG;
+			return -1;
+		}
 #ifdef HAVE_SOCKADDR_UN_LEN
-		unsigned int len =
+		saddr.sun_len = len + 1;
 #endif
-		    strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
-#ifdef HAVE_SOCKADDR_UN_LEN
-		saddr.sun_len = len >= sizeof saddr.sun_path
-			      ? sizeof saddr.sun_path : len + 1;
-#endif
 		saddr.sun_family = AF_UNIX;
 
 		if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
-		    || (unlink(pathname) < 0 && errno != ENOENT)
-		    || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
+		 || (unlink(pathname) < 0 && errno != ENOENT)
+		 || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
 			return -1;
 		close(sock);
 #ifdef HAVE_CHMOD
-		return do_chmod(pathname, mode);
+		return do_chmod(pathname, mode, 0);
 #else
 		return 0;
 #endif
@@ -133,7 +304,22 @@ int do_rmdir(const char *pathname)
 {
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
-	return rmdir(pathname);
+	if (rmdir(pathname) == 0)
+		return 0;
+#ifdef SUPPORT_FORCE_CHANGE
+	if (force_change && errno == EPERM) {
+		STRUCT_STAT st;
+
+		if (x_lstat(pathname, &st, NULL) == 0
+		 && make_mutable(pathname, st.st_mode, st.st_flags, force_change) > 0) {
+			if (rmdir(pathname) == 0)
+				return 0;
+			undo_make_mutable(pathname, st.st_flags);
+		}
+		errno = EPERM;
+	}
+#endif
+	return -1;
 }
 
 int do_open(const char *pathname, int flags, mode_t mode)
@@ -143,11 +329,18 @@ int do_open(const char *pathname, int flags, mode_t mo
 		RETURN_ERROR_IF_RO_OR_LO;
 	}
 
+#ifdef O_NOATIME
+	if (open_noatime)
+		flags |= O_NOATIME;
+#endif
+	if (direct_io)
+		flags |= O_DIRECT;
+
 	return open(pathname, flags | O_BINARY, mode);
 }
 
 #ifdef HAVE_CHMOD
-int do_chmod(const char *path, mode_t mode)
+int do_chmod(const char *path, mode_t mode, UNUSED(uint32 fileflags))
 {
 	int code;
 	if (dry_run) return 0;
@@ -170,19 +363,74 @@ int do_chmod(const char *path, mode_t mode)
 	} else
 		code = chmod(path, mode & CHMOD_BITS); /* DISCOURAGED FUNCTION */
 #endif /* !HAVE_LCHMOD */
+#ifdef SUPPORT_FORCE_CHANGE
+	if (code < 0 && force_change && errno == EPERM && !S_ISLNK(mode)) {
+		if (fileflags == NO_FFLAGS) {
+			STRUCT_STAT st;
+			if (x_lstat(path, &st, NULL) == 0)
+				fileflags = st.st_flags;
+		}
+		if (fileflags != NO_FFLAGS
+		 && make_mutable(path, mode, fileflags, force_change) > 0) {
+			code = chmod(path, mode & CHMOD_BITS);
+			undo_make_mutable(path, fileflags);
+			if (code == 0)
+				return 0;
+		}
+		errno = EPERM;
+	}
+#endif
 	if (code != 0 && (preserve_perms || preserve_executability))
 		return code;
 	return 0;
 }
 #endif
 
-int do_rename(const char *fname1, const char *fname2)
+#ifdef HAVE_CHFLAGS
+int do_chflags(const char *path, uint32 fileflags)
 {
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
-	return rename(fname1, fname2);
+	return chflags(path, fileflags);
 }
+#endif
 
+int do_rename(const char *old_path, const char *new_path)
+{
+	if (dry_run) return 0;
+	RETURN_ERROR_IF_RO_OR_LO;
+	if (rename(old_path, new_path) == 0)
+		return 0;
+#ifdef SUPPORT_FORCE_CHANGE
+	if (force_change && errno == EPERM) {
+		STRUCT_STAT st1, st2;
+		int became_mutable;
+
+		if (x_lstat(old_path, &st1, NULL) != 0)
+			goto failed;
+		became_mutable = make_mutable(old_path, st1.st_mode, st1.st_flags, force_change) > 0;
+		if (became_mutable && rename(old_path, new_path) == 0)
+			goto success;
+		if (x_lstat(new_path, &st2, NULL) == 0
+		 && make_mutable(new_path, st2.st_mode, st2.st_flags, force_change) > 0) {
+			if (rename(old_path, new_path) == 0) {
+			  success:
+				if (became_mutable) /* Yes, use new_path and st1! */
+					undo_make_mutable(new_path, st1.st_flags);
+				return 0;
+			}
+			undo_make_mutable(new_path, st2.st_flags);
+		}
+		/* TODO: handle immutable directories */
+		if (became_mutable)
+			undo_make_mutable(old_path, st1.st_flags);
+	  failed:
+		errno = EPERM;
+	}
+#endif
+	return -1;
+}
+
 #ifdef HAVE_FTRUNCATE
 int do_ftruncate(int fd, OFF_T size)
 {
@@ -217,22 +465,6 @@ void trim_trailing_slashes(char *name)
 	}
 }
 
-int do_mkdir_path(char *fname, mode_t mode)
-{
-	char fnametmp[MAXPATHLEN], *fnametmpptr;
-	STRUCT_STAT st;
-
-	if (fname) {
-		strcpy(fnametmp, fname);
-		if ((fnametmpptr = strrchr(fnametmp, '/')) != NULL) {
-			*fnametmpptr = '\0';
-			if (do_stat(fnametmp, &st) < 0)
-				do_mkdir_path(fnametmp, mode);
-		}
-	}
-	return do_mkdir(fname, mode);
-}
-
 int do_mkdir(char *fname, mode_t mode)
 {
 	if (dry_run) return 0;
@@ -317,55 +549,132 @@ OFF_T do_lseek(int fd, OFF_T offset, int whence)
 #endif
 }
 
+#ifdef HAVE_SETATTRLIST
+int do_setattrlist_times(const char *fname, STRUCT_STAT *stp)
+{
+	struct attrlist attrList;
+	struct timespec ts;
+
+	if (dry_run) return 0;
+	RETURN_ERROR_IF_RO_OR_LO;
+
+	ts.tv_sec = stp->st_mtime;
+	ts.tv_nsec = stp->ST_MTIME_NSEC;
+
+	memset(&attrList, 0, sizeof attrList);
+	attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+	attrList.commonattr = ATTR_CMN_MODTIME;
+	return setattrlist(fname, &attrList, &ts, sizeof ts, FSOPT_NOFOLLOW);
+}
+#endif
+
+#ifdef SUPPORT_CRTIMES
+time_t get_create_time(const char *path)
+{
+	static struct create_time attrBuf;
+	struct attrlist attrList;
+
+	memset(&attrList, 0, sizeof attrList);
+	attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+	attrList.commonattr = ATTR_CMN_CRTIME;
+	if (getattrlist(path, &attrList, &attrBuf, sizeof attrBuf, FSOPT_NOFOLLOW) < 0)
+		return 0;
+	return attrBuf.crtime.tv_sec;
+}
+#endif
+
+#ifdef SUPPORT_CRTIMES
+int set_create_time(const char *path, time_t crtime)
+{
+	struct attrlist attrList;
+	struct timespec ts;
+
+	if (dry_run) return 0;
+	RETURN_ERROR_IF_RO_OR_LO;
+
+	ts.tv_sec = crtime;
+	ts.tv_nsec = 0;
+
+	memset(&attrList, 0, sizeof attrList);
+	attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+	attrList.commonattr = ATTR_CMN_CRTIME;
+	return setattrlist(path, &attrList, &ts, sizeof ts, FSOPT_NOFOLLOW);
+}
+#endif
+
 #ifdef HAVE_UTIMENSAT
-int do_utimensat(const char *fname, time_t modtime, uint32 mod_nsec)
+int do_utimensat(const char *fname, STRUCT_STAT *stp)
 {
 	struct timespec t[2];
 
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
 
-	t[0].tv_sec = 0;
-	t[0].tv_nsec = UTIME_NOW;
-	t[1].tv_sec = modtime;
-	t[1].tv_nsec = mod_nsec;
+	t[0].tv_sec = stp->st_atime;
+#ifdef ST_ATIME_NSEC
+	t[0].tv_nsec = stp->ST_ATIME_NSEC;
+#else
+	t[0].tv_nsec = 0;
+#endif
+	t[1].tv_sec = stp->st_mtime;
+#ifdef ST_MTIME_NSEC
+	t[1].tv_nsec = stp->ST_MTIME_NSEC;
+#else
+	t[1].tv_nsec = 0;
+#endif
 	return utimensat(AT_FDCWD, fname, t, AT_SYMLINK_NOFOLLOW);
 }
 #endif
 
 #ifdef HAVE_LUTIMES
-int do_lutimes(const char *fname, time_t modtime, uint32 mod_nsec)
+int do_lutimes(const char *fname, STRUCT_STAT *stp)
 {
 	struct timeval t[2];
 
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
 
-	t[0].tv_sec = time(NULL);
+	t[0].tv_sec = stp->st_atime;
+#ifdef ST_ATIME_NSEC
+	t[0].tv_usec = stp->ST_ATIME_NSEC / 1000;
+#else
 	t[0].tv_usec = 0;
-	t[1].tv_sec = modtime;
-	t[1].tv_usec = mod_nsec / 1000;
+#endif
+	t[1].tv_sec = stp->st_mtime;
+#ifdef ST_MTIME_NSEC
+	t[1].tv_usec = stp->ST_MTIME_NSEC / 1000;
+#else
+	t[1].tv_usec = 0;
+#endif
 	return lutimes(fname, t);
 }
 #endif
 
 #ifdef HAVE_UTIMES
-int do_utimes(const char *fname, time_t modtime, uint32 mod_nsec)
+int do_utimes(const char *fname, STRUCT_STAT *stp)
 {
 	struct timeval t[2];
 
 	if (dry_run) return 0;
 	RETURN_ERROR_IF_RO_OR_LO;
 
-	t[0].tv_sec = time(NULL);
+	t[0].tv_sec = stp->st_atime;
+#ifdef ST_ATIME_NSEC
+	t[0].tv_usec = stp->ST_ATIME_NSEC / 1000;
+#else
 	t[0].tv_usec = 0;
-	t[1].tv_sec = modtime;
-	t[1].tv_usec = mod_nsec / 1000;
+#endif
+	t[1].tv_sec = stp->st_mtime;
+#ifdef ST_MTIME_NSEC
+	t[1].tv_usec = stp->ST_MTIME_NSEC / 1000;
+#else
+	t[1].tv_usec = 0;
+#endif
 	return utimes(fname, t);
 }
 
 #elif defined HAVE_UTIME
-int do_utime(const char *fname, time_t modtime, UNUSED(uint32 mod_nsec))
+int do_utime(const char *fname, STRUCT_STAT *stp)
 {
 #ifdef HAVE_STRUCT_UTIMBUF
 	struct utimbuf tbuf;
@@ -377,12 +686,12 @@ int do_utime(const char *fname, time_t modtime, UNUSED
 	RETURN_ERROR_IF_RO_OR_LO;
 
 # ifdef HAVE_STRUCT_UTIMBUF
-	tbuf.actime = time(NULL);
-	tbuf.modtime = modtime;
+	tbuf.actime = stp->st_atime;
+	tbuf.modtime = stp->st_mtime;
 	return utime(fname, &tbuf);
 # else
-	t[0] = time(NULL);
-	t[1] = modtime;
+	t[0] = stp->st_atime;
+	t[1] = stp->st_mtime;
 	return utime(fname, t);
 # endif
 }
@@ -390,3 +699,129 @@ int do_utime(const char *fname, time_t modtime, UNUSED
 #else
 #error Need utimes or utime function.
 #endif
+
+#ifdef SUPPORT_PREALLOCATION
+#ifdef FALLOC_FL_KEEP_SIZE
+#define DO_FALLOC_OPTIONS FALLOC_FL_KEEP_SIZE
+#else
+#define DO_FALLOC_OPTIONS 0
+#endif
+
+OFF_T do_fallocate(int fd, OFF_T offset, OFF_T length)
+{
+	int opts = inplace || preallocate_files ? DO_FALLOC_OPTIONS : 0;
+	int ret;
+	RETURN_ERROR_IF(dry_run, 0);
+	RETURN_ERROR_IF_RO_OR_LO;
+	if (length & 1) /* make the length not match the desired length */
+		length++;
+	else
+		length--;
+#if defined HAVE_FALLOCATE
+	ret = fallocate(fd, opts, offset, length);
+#elif defined HAVE_SYS_FALLOCATE
+	ret = syscall(SYS_fallocate, fd, opts, (loff_t)offset, (loff_t)length);
+#elif defined HAVE_EFFICIENT_POSIX_FALLOCATE
+	ret = posix_fallocate(fd, offset, length);
+#else
+#error Coding error in SUPPORT_PREALLOCATION logic.
+#endif
+	if (ret < 0)
+		return ret;
+	if (opts == 0) {
+		STRUCT_STAT st;
+		if (do_fstat(fd, &st) < 0)
+			return length;
+		return st.st_blocks * S_BLKSIZE;
+	}
+	return 0;
+}
+#endif
+
+/* Punch a hole at pos for len bytes. The current file position must be at pos and will be
+ * changed to be at pos + len. */
+int do_punch_hole(int fd, OFF_T pos, OFF_T len)
+{
+#ifdef HAVE_FALLOCATE
+# ifdef HAVE_FALLOC_FL_PUNCH_HOLE
+	if (fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, pos, len) == 0) {
+		if (do_lseek(fd, len, SEEK_CUR) != pos + len)
+			return -1;
+		return 0;
+	}
+# endif
+# ifdef HAVE_FALLOC_FL_ZERO_RANGE
+	if (fallocate(fd, FALLOC_FL_ZERO_RANGE, pos, len) == 0) {
+		if (do_lseek(fd, len, SEEK_CUR) != pos + len)
+			return -1;
+		return 0;
+	}
+# endif
+#else
+	(void)pos;
+#endif
+	{
+		char zeros[4096];
+		memset(zeros, 0, sizeof zeros);
+		while (len > 0) {
+			int chunk = len > (int)sizeof zeros ? (int)sizeof zeros : len;
+			int wrote = write(fd, zeros, chunk);
+			if (wrote <= 0) {
+				if (wrote < 0 && errno == EINTR)
+					continue;
+				return -1;
+			}
+			len -= wrote;
+		}
+	}
+	return 0;
+}
+
+int do_open_nofollow(const char *pathname, int flags)
+{
+#ifndef O_NOFOLLOW
+	STRUCT_STAT f_st, l_st;
+#endif
+	int fd;
+
+	if (flags != O_RDONLY) {
+		RETURN_ERROR_IF(dry_run, 0);
+		RETURN_ERROR_IF_RO_OR_LO;
+#ifndef O_NOFOLLOW
+		/* This function doesn't support write attempts w/o O_NOFOLLOW. */
+		errno = EINVAL;
+		return -1;
+#endif
+	}
+
+	if (direct_io)
+		flags |= O_DIRECT;
+
+#ifdef O_NOFOLLOW
+	fd = open(pathname, flags|O_NOFOLLOW);
+#else
+	if (do_lstat(pathname, &l_st) < 0)
+		return -1;
+	if (S_ISLNK(l_st.st_mode)) {
+		errno = ELOOP;
+		return -1;
+	}
+	if ((fd = open(pathname, flags)) < 0)
+		return fd;
+	if (do_fstat(fd, &f_st) < 0) {
+	  close_and_return_error:
+		{
+			int save_errno = errno;
+			close(fd);
+			errno = save_errno;
+		}
+		return -1;
+	}
+	if (l_st.st_dev != f_st.st_dev || l_st.st_ino != f_st.st_ino) {
+		errno = EINVAL;
+		goto close_and_return_error;
+	}
+#endif
+
+	return fd;
+}