libroot: Use AT_FDCWD rather than hardcoding -1 in many places.

AT_FDCWD is now -100, not -1, though the kernel accepts any negative
value at the moment.

src/system/libroot/os/fs_attr.cpp

@@ -96,7 +96,7 @@ fs_stat_attr(int fd, const char* attribute, struct attr_info* attrInfo)
 int
 fs_open_attr(const char *path, const char *attribute, uint32 type, int openMode)
 {
-	status_t status = _kern_open_attr(-1, path, attribute, type, openMode);
+	status_t status = _kern_open_attr(AT_FDCWD, path, attribute, type, openMode);
 	RETURN_AND_SET_ERRNO(status);
 }
 
@@ -121,14 +121,14 @@ fs_close_attr(int fd)
 extern "C" DIR*
 fs_open_attr_dir(const char* path)
 {
-	return open_attr_dir(-1, path, true);
+	return open_attr_dir(AT_FDCWD, path, true);
 }
 
 
 extern "C" DIR*
 fs_lopen_attr_dir(const char* path)
 {
-	return open_attr_dir(-1, path, false);
+	return open_attr_dir(AT_FDCWD, path, false);
 }
 
 extern "C" DIR*
@@ -157,4 +157,3 @@ fs_rewind_attr_dir(DIR* dir)
 {
 	rewinddir(dir);
 }
-

src/system/libroot/os/fs_info.cpp

@@ -20,7 +20,7 @@ dev_t
 dev_for_path(const char *path)
 {
 	struct stat stat;
-	int status = _kern_read_stat(-1, path, true, &stat, sizeof(struct stat));
+	int status = _kern_read_stat(AT_FDCWD, path, true, &stat, sizeof(struct stat));
 	if (status == B_OK)
 		return stat.st_dev;
 
@@ -65,5 +65,3 @@ fs_stat_dev(dev_t device, fs_info *info)
 
 	RETURN_AND_SET_ERRNO(status);
 }
-
-

src/system/libroot/posix/dirent.cpp

@@ -164,7 +164,7 @@ opendir(const char* path)
 {
 	DIR* dir;
 
-	int fd = _kern_open_dir(-1, path);
+	int fd = _kern_open_dir(AT_FDCWD, path);
 	if (fd < 0) {
 		__set_errno(fd);
 		return NULL;

src/system/libroot/posix/fcntl.cpp

@@ -23,7 +23,7 @@ int
 creat(const char *path, mode_t mode)
 {
 	RETURN_AND_SET_ERRNO_TEST_CANCEL(
-		_kern_open(-1, path, O_CREAT | O_TRUNC | O_WRONLY, mode & ~__gUmask));
+		_kern_open(AT_FDCWD, path, O_CREAT | O_TRUNC | O_WRONLY, mode & ~__gUmask));
 		// adapt the permissions as required by POSIX
 }
 
@@ -40,7 +40,7 @@ open(const char *path, int openMode, ...)
 		va_end(args);
 	}
 
-	RETURN_AND_SET_ERRNO_TEST_CANCEL(_kern_open(-1, path, openMode, perms));
+	RETURN_AND_SET_ERRNO_TEST_CANCEL(_kern_open(AT_FDCWD, path, openMode, perms));
 }
 
 

src/system/libroot/posix/stdio/remove.c

@@ -16,9 +16,9 @@ int
 remove(const char* path)
 {
 	// TODO: find a better way that does not require two syscalls for directories
-	int status = _kern_unlink(-1, path);
+	int status = _kern_unlink(AT_FDCWD, path);
 	if (status == B_IS_A_DIRECTORY)
-		status = _kern_remove_dir(-1, path);
+		status = _kern_remove_dir(AT_FDCWD, path);
 
 	if (status != B_OK) {
 		__set_errno(status);
@@ -27,4 +27,3 @@ remove(const char* path)
 
 	return status;
 }
-

src/system/libroot/posix/stdio/rename.c

@@ -15,7 +15,7 @@
 int
 rename(const char *from, const char *to)
 {
-	RETURN_AND_SET_ERRNO(_kern_rename(-1, from, -1, to));
+	return renameat(AT_FDCWD, from, AT_FDCWD, to);
 }
 
 

src/system/libroot/posix/sys/chmod.c

@@ -21,7 +21,7 @@ chmod(const char *path, mode_t mode)
 	status_t status;
 
 	stat.st_mode = mode;
-	status = _kern_write_stat(-1, path, true, &stat, sizeof(struct stat),
+	status = _kern_write_stat(AT_FDCWD, path, true, &stat, sizeof(struct stat),
 		B_STAT_MODE);
 
 	RETURN_AND_SET_ERRNO(status);

src/system/libroot/posix/sys/mkdir.c

@@ -16,7 +16,7 @@
 int
 mkdir(const char* path, mode_t mode)
 {
-	RETURN_AND_SET_ERRNO(_kern_create_dir(-1, path, mode & ~__gUmask));
+	return mkdirat(AT_FDCWD, path, mode);
 }
 
 

src/system/libroot/posix/sys/stat.c

@@ -28,37 +28,32 @@ int _lstat_beos(const char* path, struct stat_beos* beosStat);
 int
 _stat_current(const char* path, struct stat* stat)
 {
-	int status = _kern_read_stat(-1, path, true, stat, sizeof(struct stat));
-
-	RETURN_AND_SET_ERRNO(status);
+	RETURN_AND_SET_ERRNO(_kern_read_stat(AT_FDCWD, path, true,
+		stat, sizeof(struct stat)));
 }
 
 
 int
 _fstat_current(int fd, struct stat* stat)
 {
-	int status = _kern_read_stat(fd, NULL, false, stat, sizeof(struct stat));
-
-	RETURN_AND_SET_ERRNO(status);
+	RETURN_AND_SET_ERRNO(_kern_read_stat(fd, NULL, false,
+		stat, sizeof(struct stat)));
 }
 
 
 int
 _lstat_current(const char* path, struct stat* stat)
 {
-	int status = _kern_read_stat(-1, path, false, stat, sizeof(struct stat));
-
-	RETURN_AND_SET_ERRNO(status);
+	RETURN_AND_SET_ERRNO(_kern_read_stat(AT_FDCWD, path, false,
+		stat, sizeof(struct stat)));
 }
 
 
 int
-fstatat(int fd, const char *path, struct stat *st, int flag)
+fstatat(int fd, const char* path, struct stat* stat, int flag)
 {
-	int status = _kern_read_stat(fd, path, (flag & AT_SYMLINK_NOFOLLOW) == 0,
-		st, sizeof(struct stat));
-
-	RETURN_AND_SET_ERRNO(status);
+	RETURN_AND_SET_ERRNO(_kern_read_stat(fd, path, (flag & AT_SYMLINK_NOFOLLOW) == 0,
+		stat, sizeof(struct stat)));
 }
 
 

src/system/libroot/posix/sys/utimes.c

@@ -39,7 +39,7 @@ _utimes(const char* path, const struct timeval times[2], bool traverseLink)
 	}
 
 	// traverseLeafLink == true
-	status = _kern_write_stat(-1, path, traverseLink, &stat,
+	status = _kern_write_stat(AT_FDCWD, path, traverseLink, &stat,
 		sizeof(struct stat), B_STAT_MODIFICATION_TIME | B_STAT_ACCESS_TIME);
 
 	RETURN_AND_SET_ERRNO(status);

src/system/libroot/posix/unistd/access.c

@@ -15,17 +15,13 @@
 int
 access(const char* path, int accessMode)
 {
-	status_t status = _kern_access(-1, path, accessMode, false);
-
-	RETURN_AND_SET_ERRNO(status);
+	return faccessat(AT_FDCWD, path, accessMode, 0);
 }
 
 
 int
 faccessat(int fd, const char* path, int accessMode, int flag)
 {
-	status_t status = _kern_access(fd, path, accessMode,
-		(flag & AT_EACCESS) != 0);
-
-	RETURN_AND_SET_ERRNO(status);
+	RETURN_AND_SET_ERRNO(_kern_access(fd, path, accessMode,
+		(flag & AT_EACCESS) != 0));
 }

src/system/libroot/posix/unistd/chown.c

@@ -41,14 +41,14 @@ common_chown(int fd, const char* path, bool followLinks, uid_t owner,
 int
 chown(const char *path, uid_t owner, gid_t group)
 {
-	return common_chown(-1, path, true, owner, group);
+	return common_chown(AT_FDCWD, path, true, owner, group);
 }
 
 
 int
 lchown(const char *path, uid_t owner, gid_t group)
 {
-	return common_chown(-1, path, false, owner, group);
+	return common_chown(AT_FDCWD, path, false, owner, group);
 }
 
 

src/system/libroot/posix/unistd/directory.c

@@ -16,7 +16,7 @@
 int
 chdir(const char *path)
 {
-	RETURN_AND_SET_ERRNO(_kern_setcwd(-1, path));
+	RETURN_AND_SET_ERRNO(_kern_setcwd(AT_FDCWD, path));
 }
 
 
@@ -58,6 +58,6 @@ getcwd(char *buffer, size_t size)
 int
 rmdir(const char *path)
 {
-	RETURN_AND_SET_ERRNO(_kern_remove_dir(-1, path));
+	RETURN_AND_SET_ERRNO(_kern_remove_dir(AT_FDCWD, path));
 }
 

src/system/libroot/posix/unistd/link.c

@@ -46,9 +46,7 @@ readlinkat(int fd, const char *path, char *buffer, size_t bufferSize)
 int
 symlink(const char *toPath, const char *symlinkPath)
 {
-	int status = _kern_create_symlink(-1, symlinkPath, toPath, 0);
-
-	RETURN_AND_SET_ERRNO(status);
+	return symlinkat(toPath, AT_FDCWD, symlinkPath);
 }
 
 
@@ -62,9 +60,7 @@ symlinkat(const char *toPath, int fd, const char *symlinkPath)
 int
 unlink(const char *path)
 {
-	int status = _kern_unlink(-1, path);
-
-	RETURN_AND_SET_ERRNO(status);
+	return unlinkat(AT_FDCWD, path, 0);
 }
 
 

src/system/libroot/posix/unistd/truncate.c

@@ -22,7 +22,7 @@ truncate(const char *path, off_t newSize)
 	status_t status;
 
 	stat.st_size = newSize;
-	status = _kern_write_stat(-1, path, true, &stat, sizeof(struct stat),
+	status = _kern_write_stat(AT_FDCWD, path, true, &stat, sizeof(struct stat),
 		B_STAT_SIZE);
 
 	RETURN_AND_SET_ERRNO(status);

src/system/libroot/posix/utime.c

@@ -32,7 +32,7 @@ utime(const char *path, const struct utimbuf *times)
 		stat.st_atim.tv_nsec = stat.st_mtim.tv_nsec = (now % 1000000) * 1000;
 	}
 
-	status = _kern_write_stat(-1, path, true, &stat, sizeof(struct stat),
+	status = _kern_write_stat(AT_FDCWD, path, true, &stat, sizeof(struct stat),
 		B_STAT_MODIFICATION_TIME | B_STAT_ACCESS_TIME);
 
 	RETURN_AND_SET_ERRNO(status);