+++ /dev/null
-/*
- * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#ifndef _COMPAT_DIRECTORY_HANDLE_H
-#define _COMPAT_DIRECTORY_HANDLE_H
-
-#include <common/credentials.h>
-#include <common/macros.h>
-#include <sys/stat.h>
-#include <urcu/ref.h>
-
-enum lttng_directory_handle_rmdir_recursive_flags {
- LTTNG_DIRECTORY_HANDLE_FAIL_NON_EMPTY_FLAG = (1U << 0),
- LTTNG_DIRECTORY_HANDLE_SKIP_NON_EMPTY_FLAG = (1U << 1),
-};
-
-/*
- * Some platforms, such as Solaris 10, do not support directory file descriptors
- * and their associated functions (*at(...)), which are defined in POSIX.2008.
- *
- * This wrapper provides a handle that is either a copy of a directory's path
- * or a directory file descriptors, depending on the platform's capabilities.
- */
-#ifdef HAVE_DIRFD
-
-struct lttng_directory_handle;
-
-typedef void (*lttng_directory_handle_destroy_cb)(
- struct lttng_directory_handle *handle, void *data);
-
-struct lttng_directory_handle {
- struct urcu_ref ref;
- ino_t directory_inode;
- int dirfd;
- lttng_directory_handle_destroy_cb destroy_cb;
- void *destroy_cb_data;
-};
-
-static inline
-int lttng_directory_handle_get_dirfd(
- const struct lttng_directory_handle *handle)
-{
- return handle->dirfd;
-}
-
-#else
-struct lttng_directory_handle {
- struct urcu_ref ref;
- char *base_path;
-};
-#endif
-
-/*
- * Create a directory handle to the provided path. Passing a NULL path
- * returns a handle to the current working directory.
- *
- * The reference to the directory handle must be released using
- * lttng_directory_handle_put().
- */
-struct lttng_directory_handle *lttng_directory_handle_create(
- const char *path);
-
-/*
- * Create a new directory handle to a path relative to an existing handle.
- *
- * The provided path must already exist. Note that the creation of a
- * subdirectory and the creation of a handle are kept as separate operations
- * to highlight the fact that there is an inherent race between the creation of
- * a directory and the creation of a handle to it.
- *
- * Passing a NULL path effectively copies the original handle.
- *
- * The reference to the directory handle must be released using
- * lttng_directory_handle_put().
- */
-struct lttng_directory_handle *lttng_directory_handle_create_from_handle(
- const char *path,
- const struct lttng_directory_handle *ref_handle);
-
-/*
- * Create a new directory handle from an existing directory fd.
- *
- * The new directory handle assumes the ownership of the directory fd.
- * Note that this method should only be used in very specific cases, such as
- * re-creating a directory handle from a dirfd passed over a unix socket.
- *
- * The reference to the directory handle must be released using
- * lttng_directory_handle_put().
- */
-struct lttng_directory_handle *lttng_directory_handle_create_from_dirfd(
- int dirfd);
-
-/*
- * Copy a directory handle.
- *
- * The reference to the directory handle must be released using
- * lttng_directory_handle_put().
- */
-struct lttng_directory_handle *lttng_directory_handle_copy(
- const struct lttng_directory_handle *handle);
-
-/*
- * Acquire a reference to a directory handle.
- */
-bool lttng_directory_handle_get(struct lttng_directory_handle *handle);
-
-/*
- * Release a reference to a directory handle.
- */
-void lttng_directory_handle_put(struct lttng_directory_handle *handle);
-
-/*
- * Create a subdirectory relative to a directory handle.
- */
-int lttng_directory_handle_create_subdirectory(
- const struct lttng_directory_handle *handle,
- const char *subdirectory,
- mode_t mode);
-
-/*
- * Create a subdirectory relative to a directory handle
- * as a given user.
- */
-int lttng_directory_handle_create_subdirectory_as_user(
- const struct lttng_directory_handle *handle,
- const char *subdirectory,
- mode_t mode, const struct lttng_credentials *creds);
-
-/*
- * Recursively create a directory relative to a directory handle.
- */
-int lttng_directory_handle_create_subdirectory_recursive(
- const struct lttng_directory_handle *handle,
- const char *subdirectory_path,
- mode_t mode);
-
-/*
- * Recursively create a directory relative to a directory handle
- * as a given user.
- */
-int lttng_directory_handle_create_subdirectory_recursive_as_user(
- const struct lttng_directory_handle *handle,
- const char *subdirectory_path,
- mode_t mode, const struct lttng_credentials *creds);
-
-/*
- * Open a file descriptor to a path relative to a directory handle.
- */
-int lttng_directory_handle_open_file(
- const struct lttng_directory_handle *handle,
- const char *filename,
- int flags, mode_t mode);
-
-/*
- * Open a file descriptor to a path relative to a directory handle
- * as a given user.
- */
-int lttng_directory_handle_open_file_as_user(
- const struct lttng_directory_handle *handle,
- const char *filename,
- int flags, mode_t mode,
- const struct lttng_credentials *creds);
-
-/*
- * Unlink a file to a path relative to a directory handle.
- */
-int lttng_directory_handle_unlink_file(
- const struct lttng_directory_handle *handle,
- const char *filename);
-
-/*
- * Unlink a file to a path relative to a directory handle as a given user.
- */
-int lttng_directory_handle_unlink_file_as_user(
- const struct lttng_directory_handle *handle,
- const char *filename,
- const struct lttng_credentials *creds);
-
-/*
- * Rename a file from a path relative to a directory handle to a new
- * name relative to another directory handle.
- */
-int lttng_directory_handle_rename(
- const struct lttng_directory_handle *old_handle,
- const char *old_name,
- const struct lttng_directory_handle *new_handle,
- const char *new_name);
-
-/*
- * Rename a file from a path relative to a directory handle to a new
- * name relative to another directory handle as a given user.
- */
-int lttng_directory_handle_rename_as_user(
- const struct lttng_directory_handle *old_handle,
- const char *old_name,
- const struct lttng_directory_handle *new_handle,
- const char *new_name,
- const struct lttng_credentials *creds);
-
-/*
- * Remove a subdirectory relative to a directory handle.
- */
-int lttng_directory_handle_remove_subdirectory(
- const struct lttng_directory_handle *handle,
- const char *name);
-
-/*
- * Remove a subdirectory relative to a directory handle as a given user.
- */
-int lttng_directory_handle_remove_subdirectory_as_user(
- const struct lttng_directory_handle *handle,
- const char *name,
- const struct lttng_credentials *creds);
-
-/*
- * Remove a subdirectory and remove its contents if it only
- * consists in empty directories.
- * @flags: enum lttng_directory_handle_rmdir_recursive_flags
- */
-int lttng_directory_handle_remove_subdirectory_recursive(
- const struct lttng_directory_handle *handle,
- const char *name, int flags);
-
-/*
- * Remove a subdirectory and remove its contents if it only
- * consists in empty directories as a given user.
- * @flags: enum lttng_directory_handle_rmdir_recursive_flags
- */
-int lttng_directory_handle_remove_subdirectory_recursive_as_user(
- const struct lttng_directory_handle *handle,
- const char *name,
- const struct lttng_credentials *creds,
- int flags);
-
-/*
- * stat() a file relative to a directory handle.
- */
-int lttng_directory_handle_stat(
- const struct lttng_directory_handle *handle,
- const char *name,
- struct stat *stat_buf);
-
-/*
- * Returns true if this directory handle is backed by a file
- * descriptor, false otherwise.
- */
-bool lttng_directory_handle_uses_fd(
- const struct lttng_directory_handle *handle);
-
-/*
- * Compare two directory handles.
- *
- * Returns true if the two directory handles are equal, false otherwise.
- */
-bool lttng_directory_handle_equals(const struct lttng_directory_handle *lhs,
- const struct lttng_directory_handle *rhs);
-
-
-#endif /* _COMPAT_PATH_HANDLE_H */
projects / lttng-tools.git / blobdiff