pavao_sys/

lib.rs

#![warn(missing_docs)]

//! Raw Rust bindings to Samba's `libsmbclient` library.
//!
//! This crate mirrors the native C types and functions. Most callers should use the safe
//! [`pavao`](https://docs.rs/pavao) crate instead.
//!
//! # Safety
//!
//! The bindings do not validate pointers, lifetimes, buffer lengths, context state, or native
//! return values. Callers must uphold the corresponding `libsmbclient` C API contracts.
//! `libsmbclient` also shares process-wide parameter state, so separate contexts are not sufficient
//! for thread safety. Callers must serialize all raw native activity with one process-wide lock.
//! These bindings do not coordinate with Pavão's safe-wrapper lock; raw calls must never race a
//! Pavão operation or any other raw `libsmbclient` call.
//!
//! # Callback contracts
//!
//! Unless an alias says otherwise, callbacks require a live, initialized context; every file or
//! directory handle must be live and belong to that context; C strings must be NUL-terminated and
//! readable for the call; and buffers must be valid for the supplied size. File and directory
//! operation callbacks generally return `-1` or null with `errno` set on failure. Server-cache
//! callbacks instead return one on failure and do not promise an `errno` value. Callback
//! implementations must not unwind across the C ABI boundary.
//!
//! Directory-entry pointers are borrowed from `libsmbclient`. They may be invalidated by the next
//! read on the same directory or when the directory is closed, so callers must copy needed data.
//!
//! # Feature flags
//!
//! | name       | description                                         | default |
//! |------------|-----------------------------------------------------|---------|
//! | `abi-0-6`  | Require libsmbclient ABI 0.6 or newer.             |         |
//! | `abi-0-8`  | Require libsmbclient ABI 0.8 or newer.             |         |
//! | `vendored` | Build the bundled Samba source instead of using the system library. |         |
//!

#![doc(html_playground_url = "https://play.rust-lang.org")]
#![doc(
    html_favicon_url = "https://raw.githubusercontent.com/veeso/pavao/main/docs/images/pavao.png"
)]
#![doc(html_logo_url = "https://raw.githubusercontent.com/veeso/pavao/main/docs/images/pavao.png")]
#![allow(non_camel_case_types)]
#![allow(clippy::upper_case_acronyms)]
use std::{clone, default, mem, option};

use libc::{
    c_char, c_int, c_uint, c_ushort, c_void, mode_t, off_t, size_t, ssize_t, stat, statvfs, time_t,
    timespec, timeval,
};

#[repr(C)]
/// A directory entry returned by `libsmbclient`.
pub struct smbc_dirent {
    /// Native entry type discriminator.
    ///
    /// Values 1 through 9 represent workgroups, servers, file shares, printer shares,
    /// communications shares, IPC shares, directories, files, and links, respectively.
    pub smbc_type: c_uint,
    /// Total size of this directory-entry structure in bytes.
    pub dirlen: c_uint,
    /// Length of `comment` in bytes, excluding its terminating NUL byte.
    pub commentlen: c_uint,
    /// Pointer to the NUL-terminated entry comment.
    pub comment: *mut c_char,
    /// Length of `name` in bytes, excluding its terminating NUL byte.
    pub namelen: c_uint,
    /// Flexible trailing storage containing the NUL-terminated entry name.
    pub name: [c_char; 1usize],
}
#[repr(C)]
#[derive(Copy)]
/// Extended directory-entry metadata returned by `libsmbclient`.
pub struct libsmb_file_info {
    /// File size in bytes.
    pub size: u64,
    /// DOS attribute bitmask.
    pub attrs: c_ushort,
    /// Owning user identifier.
    pub uid: c_uint,
    /// Owning group identifier.
    pub gid: c_uint,
    /// Creation time, or zero when unsupported by the server.
    pub btime_ts: timespec,
    /// Last content-modification time.
    pub mtime_ts: timespec,
    /// Last access time.
    pub atime_ts: timespec,
    /// Last metadata-change time.
    pub ctime_ts: timespec,
    /// Pointer to the NUL-terminated entry name.
    pub name: *mut c_char,
    /// Pointer to the NUL-terminated DOS-compatible short name.
    pub short_name: *mut c_char,
}

impl clone::Clone for libsmb_file_info {
    fn clone(&self) -> Self {
        *self
    }
}

impl default::Default for libsmb_file_info {
    fn default() -> Self {
        unsafe { mem::zeroed() }
    }
}

/// Native value for the `open_share_mode` option.
pub type smbc_share_mode = c_uint;

/// Native value for the SMB transport encryption policy.
pub type smbc_smb_encrypt_level = c_int;

/// Native Boolean represented as a C integer.
pub type smbc_bool = c_int;

/// Bitmask describing filesystem capabilities reported by `libsmbclient`.
pub type smbc_vfs_feature = c_uint;

/// Directory-entry type for an SMB workgroup.
pub const SMBC_WORKGROUP: c_uint = 1;
/// Directory-entry type for an SMB server.
pub const SMBC_SERVER: c_uint = 2;
/// Directory-entry type for an SMB file share.
pub const SMBC_FILE_SHARE: c_uint = 3;
/// Directory-entry type for an SMB printer share.
pub const SMBC_PRINTER_SHARE: c_uint = 4;
/// Directory-entry type for an SMB communications share.
pub const SMBC_COMMS_SHARE: c_uint = 5;
/// Directory-entry type for an SMB IPC share.
pub const SMBC_IPC_SHARE: c_uint = 6;
/// Directory-entry type for an SMB directory.
pub const SMBC_DIR: c_uint = 7;
/// Directory-entry type for an SMB file.
pub const SMBC_FILE: c_uint = 8;
/// Directory-entry type for an SMB symbolic link.
pub const SMBC_LINK: c_uint = 9;
/// Smallest file descriptor returned by `libsmbclient`.
pub const SMBC_BASE_FD: c_int = 10_000;

/// Share mode that denies DOS compatibility access.
pub const SMBC_SHAREMODE_DENY_DOS: smbc_share_mode = 0;
/// Share mode that denies all access sharing.
pub const SMBC_SHAREMODE_DENY_ALL: smbc_share_mode = 1;
/// Share mode that denies write sharing.
pub const SMBC_SHAREMODE_DENY_WRITE: smbc_share_mode = 2;
/// Share mode that denies read sharing.
pub const SMBC_SHAREMODE_DENY_READ: smbc_share_mode = 3;
/// Share mode that allows all sharing.
pub const SMBC_SHAREMODE_DENY_NONE: smbc_share_mode = 4;
/// Share mode that denies file-control-block sharing.
pub const SMBC_SHAREMODE_DENY_FCB: smbc_share_mode = 7;

/// Default SMB encryption policy.
pub const SMBC_ENCRYPTLEVEL_DEFAULT: smbc_smb_encrypt_level = -1;
/// SMB encryption is disabled.
pub const SMBC_ENCRYPTLEVEL_NONE: smbc_smb_encrypt_level = 0;
/// SMB encryption is requested when available.
pub const SMBC_ENCRYPTLEVEL_REQUEST: smbc_smb_encrypt_level = 1;
/// SMB encryption is required.
pub const SMBC_ENCRYPTLEVEL_REQUIRE: smbc_smb_encrypt_level = 2;

/// Extended-attribute flag that requires a new attribute.
pub const SMBC_XATTR_FLAG_CREATE: c_int = 0x1;
/// Extended-attribute flag that requires an existing attribute.
pub const SMBC_XATTR_FLAG_REPLACE: c_int = 0x2;

/// DOS attribute bit for read-only files.
pub const SMBC_DOS_MODE_READONLY: c_int = 0x01;
/// DOS attribute bit for hidden files.
pub const SMBC_DOS_MODE_HIDDEN: c_int = 0x02;
/// DOS attribute bit for system files.
pub const SMBC_DOS_MODE_SYSTEM: c_int = 0x04;
/// DOS attribute bit for volume identifiers.
pub const SMBC_DOS_MODE_VOLUME_ID: c_int = 0x08;
/// DOS attribute bit for directories.
pub const SMBC_DOS_MODE_DIRECTORY: c_int = 0x10;
/// DOS attribute bit for archived files.
pub const SMBC_DOS_MODE_ARCHIVE: c_int = 0x20;

/// VFS feature indicating a read-only filesystem.
pub const SMBC_VFS_FEATURE_RDONLY: smbc_vfs_feature = 1 << 0;
/// VFS feature indicating DFS support.
pub const SMBC_VFS_FEATURE_DFS: smbc_vfs_feature = 1 << 28;
/// VFS feature indicating case-insensitive path handling.
pub const SMBC_VFS_FEATURE_CASE_INSENSITIVE: smbc_vfs_feature = 1 << 29;
/// VFS feature indicating the absence of Unix CIFS extensions.
pub const SMBC_VFS_FEATURE_NO_UNIXCIFS: smbc_vfs_feature = 1 << 30;

/// Notification filter for file-name changes.
pub const SMBC_NOTIFY_CHANGE_FILE_NAME: c_uint = 0x001;
/// Notification filter for directory-name changes.
pub const SMBC_NOTIFY_CHANGE_DIR_NAME: c_uint = 0x002;
/// Notification filter for attribute changes.
pub const SMBC_NOTIFY_CHANGE_ATTRIBUTES: c_uint = 0x004;
/// Notification filter for size changes.
pub const SMBC_NOTIFY_CHANGE_SIZE: c_uint = 0x008;
/// Notification filter for last-write changes.
pub const SMBC_NOTIFY_CHANGE_LAST_WRITE: c_uint = 0x010;
/// Notification filter for last-access changes.
pub const SMBC_NOTIFY_CHANGE_LAST_ACCESS: c_uint = 0x020;
/// Notification filter for creation-time changes.
pub const SMBC_NOTIFY_CHANGE_CREATION: c_uint = 0x040;
/// Notification filter for extended-attribute changes.
pub const SMBC_NOTIFY_CHANGE_EA: c_uint = 0x080;
/// Notification filter for security changes.
pub const SMBC_NOTIFY_CHANGE_SECURITY: c_uint = 0x100;
/// Notification filter for stream-name changes.
pub const SMBC_NOTIFY_CHANGE_STREAM_NAME: c_uint = 0x200;
/// Notification filter for stream-size changes.
pub const SMBC_NOTIFY_CHANGE_STREAM_SIZE: c_uint = 0x400;
/// Notification filter for stream-write changes.
pub const SMBC_NOTIFY_CHANGE_STREAM_WRITE: c_uint = 0x800;

/// Notification action for an added entry.
pub const SMBC_NOTIFY_ACTION_ADDED: c_uint = 1;
/// Notification action for a removed entry.
pub const SMBC_NOTIFY_ACTION_REMOVED: c_uint = 2;
/// Notification action for a modified entry.
pub const SMBC_NOTIFY_ACTION_MODIFIED: c_uint = 3;
/// Notification action for an old entry name.
pub const SMBC_NOTIFY_ACTION_OLD_NAME: c_uint = 4;
/// Notification action for a new entry name.
pub const SMBC_NOTIFY_ACTION_NEW_NAME: c_uint = 5;
/// Notification action for an added stream.
pub const SMBC_NOTIFY_ACTION_ADDED_STREAM: c_uint = 6;
/// Notification action for a removed stream.
pub const SMBC_NOTIFY_ACTION_REMOVED_STREAM: c_uint = 7;
/// Notification action for a modified stream.
pub const SMBC_NOTIFY_ACTION_MODIFIED_STREAM: c_uint = 8;

#[repr(C)]
#[derive(Copy)]
/// Information about a queued SMB print job.
pub struct print_job_info {
    /// Numeric print-job identifier.
    pub id: c_ushort,
    /// Print priority, where lower values indicate higher priority.
    pub priority: c_ushort,
    /// Print-job size in bytes.
    pub size: size_t,
    /// NUL-terminated name of the user that owns the job.
    pub user: [c_char; 128usize],
    /// NUL-terminated job name, empty for an anonymous printer file.
    pub name: [c_char; 128usize],
    /// Time at which the job was spooled.
    pub t: time_t,
}

impl clone::Clone for print_job_info {
    fn clone(&self) -> Self {
        *self
    }
}

impl default::Default for print_job_info {
    fn default() -> Self {
        unsafe { mem::zeroed() }
    }
}

/// Opaque native SMB server handle.
pub enum _SMBCSRV {}
/// Native SMB server handle.
pub type SMBCSRV = _SMBCSRV;
/// Opaque native SMB file or directory handle.
pub enum _SMBCFILE {}
/// Native SMB file or directory handle.
pub type SMBCFILE = _SMBCFILE;
/// Opaque native SMB client context.
pub enum _SMBCCTX {}
/// Native `libsmbclient` context.
pub type SMBCCTX = _SMBCCTX;

/// Optional callback that supplies authentication strings.
///
/// `srv` and `shr` are borrowed NUL-terminated strings. The callback must write NUL-terminated
/// workgroup, username, and password values without exceeding `wglen`, `unlen`, and `pwlen`.
pub type smbc_get_auth_data_fn = option::Option<
    extern "C" fn(
        srv: *const c_char,
        shr: *const c_char,
        wg: *mut c_char,
        wglen: c_int,
        un: *mut c_char,
        unlen: c_int,
        pw: *mut c_char,
        pwlen: c_int,
    ),
>;
/// Optional context-aware callback that supplies authentication strings.
///
/// `c` must be live, `srv` and `shr` are borrowed NUL-terminated strings, and each output buffer
/// must receive a NUL-terminated value without exceeding its corresponding length.
pub type smbc_get_auth_data_with_context_fn = Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        srv: *const c_char,
        shr: *const c_char,
        wg: *mut c_char,
        wglen: c_int,
        un: *mut c_char,
        unlen: c_int,
        pw: *mut c_char,
        pwlen: c_int,
    ),
>;
/// Optional callback that receives native `libsmbclient` diagnostics.
pub type smbc_debug_callback_fn =
    option::Option<extern "C" fn(private_ptr: *mut c_void, level: c_int, message: *const c_char)>;
/// Optional callback invoked for each print job in a queue.
///
/// `i` is borrowed for the callback invocation and must not be retained or freed.
pub type smbc_list_print_job_fn = option::Option<extern "C" fn(i: *mut print_job_info)>;
/// Optional callback that checks whether a cached server is still available.
///
/// `srv` must be a live server handle associated with `c`. Returns zero on success or one on
/// failure.
pub type smbc_check_server_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, srv: *mut SMBCSRV) -> c_int>;
/// Optional callback that removes an unused cached server.
///
/// `srv` must be a live server handle associated with `c`. Returns zero on success or one on
/// failure.
pub type smbc_remove_unused_server_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, srv: *mut SMBCSRV) -> c_int>;
/// Optional callback that inserts a server into the connection cache.
///
/// `srv` must be live, and all name pointers must reference NUL-terminated strings for the call.
/// Returns zero on success or one on failure.
pub type smbc_add_cached_srv_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        srv: *mut SMBCSRV,
        server: *const c_char,
        share: *const c_char,
        workgroup: *const c_char,
        username: *const c_char,
    ) -> c_int,
>;
/// Optional callback that looks up a server in the connection cache.
///
/// All name pointers must reference NUL-terminated strings for the call. A non-null result is a
/// borrowed cache entry owned by `c`; null indicates no match or failure.
pub type smbc_get_cached_srv_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        server: *const c_char,
        share: *const c_char,
        workgroup: *const c_char,
        username: *const c_char,
    ) -> *mut SMBCSRV,
>;
/// Optional callback that removes a server from the connection cache.
///
/// `srv` must be a live server handle associated with `c`. Returns zero on success or one on
/// failure.
pub type smbc_remove_cached_srv_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, srv: *mut SMBCSRV) -> c_int>;
/// Optional callback that purges the connection cache.
///
/// Returns zero on success or one when cached servers remain in use.
pub type smbc_purge_cached_fn = option::Option<extern "C" fn(c: *mut SMBCCTX) -> c_int>;

/// Optional callback that opens a remote file.
///
/// `fname` must be a NUL-terminated SMB URL and `flags` must be valid native open flags. Returns a
/// live file handle owned by `c`, or null with `errno` set on failure.
pub type smbc_open_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        fname: *const c_char,
        flags: c_int,
        mode: mode_t,
    ) -> *mut SMBCFILE,
>;
/// Optional callback that creates a remote file.
///
/// `path` must be a NUL-terminated SMB URL. Returns a live file handle owned by `c`, or null with
/// `errno` set on failure.
pub type smbc_creat_fn = option::Option<
    extern "C" fn(c: *mut SMBCCTX, path: *const c_char, mode: mode_t) -> *mut SMBCFILE,
>;
/// Optional callback that reads bytes from an open remote file.
///
/// `file` must be live and belong to `c`; `buf` must be writable for `count` bytes. Returns the
/// number of bytes read, zero at end of file, or `-1` with `errno` set on failure.
pub type smbc_read_fn = option::Option<
    extern "C" fn(c: *mut SMBCCTX, file: *mut SMBCFILE, buf: *mut c_void, count: size_t) -> ssize_t,
>;
/// Optional callback that writes bytes to an open remote file.
///
/// `file` must be live and belong to `c`; `buf` must be readable for `count` bytes. Returns the
/// number of bytes written, or `-1` with `errno` set on failure.
pub type smbc_write_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        file: *mut SMBCFILE,
        buf: *const c_void,
        count: size_t,
    ) -> ssize_t,
>;
/// Callback invoked while `libsmbclient` splices data between two open files.
pub type smbc_splice_callback_fn =
    option::Option<extern "C" fn(n: off_t, priv_: *mut c_void) -> c_int>;
/// Optional callback that splices data between two open remote files.
pub type smbc_splice_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        srcfile: *mut SMBCFILE,
        dstfile: *mut SMBCFILE,
        count: off_t,
        splice_cb: smbc_splice_callback_fn,
        priv_: *mut c_void,
    ) -> off_t,
>;
/// Optional callback that removes a remote file.
///
/// `fname` must be a NUL-terminated SMB URL. Returns zero on success or `-1` with `errno` set.
pub type smbc_unlink_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char) -> c_int>;
/// Optional callback that renames or moves a remote entry.
///
/// Both contexts must be live and both name pointers must be NUL-terminated SMB URLs. Returns zero
/// on success or `-1` with `errno` set on failure.
pub type smbc_rename_fn = option::Option<
    extern "C" fn(
        ocontext: *mut SMBCCTX,
        oname: *const c_char,
        ncontext: *mut SMBCCTX,
        nname: *const c_char,
    ) -> c_int,
>;
/// Optional callback that changes an open file's offset.
///
/// `file` must be live and belong to `c`; `whence` must be a valid `SEEK_*` value. Returns the new
/// offset or `-1` with `errno` set on failure.
pub type smbc_lseek_fn = option::Option<
    extern "C" fn(c: *mut SMBCCTX, file: *mut SMBCFILE, offset: off_t, whence: c_int) -> off_t,
>;
/// Optional callback that reads metadata for a remote path.
///
/// `fname` must be a NUL-terminated SMB URL and `st` must be writable for one `stat`. Returns zero
/// on success or `-1` with `errno` set on failure.
pub type smbc_stat_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, st: *mut stat) -> c_int>;
/// Optional callback that reads filesystem statistics for a remote path.
///
/// `fname` must be a NUL-terminated SMB URL and `st` must be writable for one `statvfs`. Returns
/// zero on success or `-1` with `errno` set on failure.
pub type smbc_statvfs_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, st: *mut statvfs) -> c_int>;
/// Optional callback that reads filesystem statistics from an open file handle.
pub type smbc_fstatvfs_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, file: *mut SMBCFILE, st: *mut statvfs) -> c_int>;
/// Optional callback that changes the length of an open remote file.
pub type smbc_ftruncate_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, file: *mut SMBCFILE, size: off_t) -> c_int>;
/// Optional callback that reads metadata from an open file handle.
///
/// `file` must be live and belong to `c`; `st` must be writable for one `stat`. Returns zero on
/// success or `-1` with `errno` set on failure.
pub type smbc_fstat_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, file: *mut SMBCFILE, st: *mut stat) -> c_int>;
/// Optional callback that closes an open file handle.
///
/// `file` must be live and belong to `c`. A successful zero return invalidates the handle; `-1`
/// indicates failure with `errno` set.
pub type smbc_close_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, file: *mut SMBCFILE) -> c_int>;
/// Optional callback that opens a remote directory.
///
/// `fname` must be a NUL-terminated SMB URL. Returns a live directory handle owned by `c`, or null
/// with `errno` set on failure.
pub type smbc_opendir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char) -> *mut SMBCFILE>;
/// Optional callback that closes an open directory handle.
///
/// `dir` must be live and belong to `c`. A successful zero return invalidates the handle; `-1`
/// indicates failure with `errno` set.
pub type smbc_closedir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE) -> c_int>;
/// Optional callback that reads the next directory entry.
///
/// `dir` must be live and belong to `c`. The returned entry is borrowed until the next read or
/// directory close. Null means end-of-directory or failure; inspect `errno` to distinguish them.
pub type smbc_readdir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE) -> *mut smbc_dirent>;
/// Optional callback that reads the next directory entry with metadata.
///
/// `dir` must be live and belong to `c`. The returned metadata is read-only and borrowed until the
/// next read or directory close. Null means end-of-directory or failure.
pub type smbc_readdirplus_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE) -> *mut libsmb_file_info>;
/// Optional callback that reads the next directory entry and metadata into `st`.
#[cfg(feature = "abi-0-6")]
pub type smbc_readdirplus2_fn = option::Option<
    extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE, st: *mut stat) -> *const libsmb_file_info,
>;
/// Optional callback that reads multiple directory entries into a buffer.
///
/// `dir` must be live and `dirp` must be writable for `count` bytes. Returns bytes written, zero at
/// end-of-directory, or `-1` with `errno` set on failure.
pub type smbc_getdents_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        dir: *mut SMBCFILE,
        dirp: *mut smbc_dirent,
        count: c_int,
    ) -> c_int,
>;
/// Optional callback that creates a remote directory.
///
/// `fname` must be a NUL-terminated SMB URL. Returns zero on success or `-1` with `errno` set.
pub type smbc_mkdir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, mode: mode_t) -> c_int>;
/// Optional callback that removes a remote directory.
///
/// `fname` must be a NUL-terminated SMB URL. Returns zero on success or `-1` with `errno` set.
pub type smbc_rmdir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char) -> c_int>;
/// Optional callback that returns the current directory-stream offset.
///
/// `dir` must be live and belong to `c`. Returns the current offset or `-1` with `errno` set.
pub type smbc_telldir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE) -> off_t>;
/// Optional callback that changes a directory-stream offset.
///
/// `dir` must be live and belong to `c`, and `offset` must come from the same stream. Returns zero
/// on success or `-1` with `errno` set on failure.
pub type smbc_lseekdir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE, offset: off_t) -> c_int>;
/// Optional callback that reads metadata from an open directory handle.
///
/// `dir` must be live and belong to `c`; `st` must be writable for one `stat`. Returns zero on
/// success or `-1` with `errno` set on failure.
pub type smbc_fstatdir_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, dir: *mut SMBCFILE, st: *mut stat) -> c_int>;
/// A single directory notification action reported by `libsmbclient`.
#[repr(C)]
pub struct smbc_notify_callback_action {
    /// Notification action discriminator.
    pub action: u32,
    /// NUL-terminated path associated with the action.
    pub filename: *const c_char,
}
/// Callback invoked with directory notification actions.
pub type smbc_notify_callback_fn = option::Option<
    extern "C" fn(
        actions: *const smbc_notify_callback_action,
        num_actions: size_t,
        private_data: *mut c_void,
    ) -> c_int,
>;
/// Optional callback that watches a directory for changes.
pub type smbc_notify_fn = option::Option<
    extern "C" fn(
        c: *mut SMBCCTX,
        dir: *mut SMBCFILE,
        recursive: smbc_bool,
        completion_filter: u32,
        callback_timeout_ms: c_uint,
        cb: smbc_notify_callback_fn,
        private_data: *mut c_void,
    ) -> c_int,
>;
/// Optional callback that changes a remote entry's POSIX mode.
///
/// `fname` must be a NUL-terminated SMB URL. Returns zero on success or `-1` with `errno` set.
pub type smbc_chmod_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, mode: mode_t) -> c_int>;
/// Optional callback that changes a remote entry's access and modification times.
///
/// `fname` must be a NUL-terminated SMB URL and `tbuf` must reference two valid `timeval` values.
/// Returns zero on success or `-1` with `errno` set on failure.
pub type smbc_utimes_fn = option::Option<
    extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, tbuf: *mut timeval) -> c_int,
>;
/// Optional callback that writes a remote entry's extended attribute.
///
/// `fname` and `name` must be NUL-terminated; `value` must be readable for `size` bytes. Returns
/// zero on success or `-1` with `errno` set on failure.
pub type smbc_setxattr_fn = option::Option<
    extern "C" fn(
        context: *mut SMBCCTX,
        fname: *const c_char,
        name: *const c_char,
        value: *const c_void,
        size: size_t,
        flags: c_int,
    ) -> c_int,
>;
/// Optional callback that reads a remote entry's extended attribute.
///
/// `fname` and `name` must be NUL-terminated. When `size` is nonzero, `value` must reference a
/// writable buffer of that size; a zero size queries the required length. Returns the value size
/// or `-1` with `errno` set on failure.
pub type smbc_getxattr_fn = option::Option<
    extern "C" fn(
        context: *mut SMBCCTX,
        fname: *const c_char,
        name: *const c_char,
        value: *const c_void,
        size: size_t,
    ) -> c_int,
>;
/// Optional callback that removes a remote entry's extended attribute.
///
/// `fname` and `name` must be NUL-terminated. Returns zero on success or `-1` with `errno` set.
pub type smbc_removexattr_fn = option::Option<
    extern "C" fn(context: *mut SMBCCTX, fname: *const c_char, name: *const c_char) -> c_int,
>;
/// Optional callback that lists a remote entry's extended attributes.
///
/// `fname` must be NUL-terminated. When `size` is nonzero, `list` must be writable for that many
/// bytes; a zero size queries the required length. Returns the list size or `-1` on failure.
pub type smbc_listxattr_fn = option::Option<
    extern "C" fn(
        context: *mut SMBCCTX,
        fname: *const c_char,
        list: *mut c_char,
        size: size_t,
    ) -> c_int,
>;
/// Optional callback that submits a remote file to a print queue.
///
/// Both contexts must be live and both string pointers must be NUL-terminated SMB URLs. Returns
/// zero on success or `-1` with `errno` set on failure.
pub type smbc_print_file_fn = option::Option<
    extern "C" fn(
        c_file: *mut SMBCCTX,
        fname: *const c_char,
        c_print: *mut SMBCCTX,
        printq: *const c_char,
    ) -> c_int,
>;
/// Optional callback that opens a new print job.
///
/// `fname` must be a NUL-terminated print-queue URL. Returns a live print handle owned by `c`, or
/// null with `errno` set on failure.
pub type smbc_open_print_job_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char) -> *mut SMBCFILE>;
/// Optional callback that enumerates jobs in a print queue.
///
/// `fname` must be a NUL-terminated queue URL and `_fn` must remain callable throughout the
/// operation. Returns zero on success or `-1` with `errno` set on failure.
pub type smbc_list_print_jobs_fn = option::Option<
    extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, _fn: smbc_list_print_job_fn) -> c_int,
>;
/// Optional callback that removes a job from a print queue.
///
/// `fname` must be a NUL-terminated queue URL. Returns zero on success or `-1` with `errno` set.
pub type smbc_unlink_print_job_fn =
    option::Option<extern "C" fn(c: *mut SMBCCTX, fname: *const c_char, id: c_int) -> c_int>;

#[link(name = "smbclient")]
unsafe extern "C" {
    /// Returns the native debug verbosity configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getDebug(c: *mut SMBCCTX) -> c_int;
    /// Sets the native debug verbosity for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_setDebug(c: *mut SMBCCTX, debug: c_int);
    /// Sets the global `libsmbclient` configuration file used by `c`.
    ///
    /// Returns zero on success or `-1` when the file cannot be loaded.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer, and `file` must point to a valid
    /// NUL-terminated path.
    pub fn smbc_setConfiguration(c: *mut SMBCCTX, file: *const c_char) -> c_int;
    /// Installs the callback used for native diagnostic messages.
    ///
    /// The callback is process-global despite being selected through `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer. If `callback` is `Some`, its function and
    /// `private_ptr` must remain valid whenever `libsmbclient` invokes it, and the callback must
    /// not unwind across the C ABI boundary.
    pub fn smbc_setLogCallback(
        c: *mut SMBCCTX,
        private_ptr: *mut c_void,
        callback: smbc_debug_callback_fn,
    );
    /// Returns the NetBIOS name configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid. The returned pointer must not be modified or freed and is invalidated by
    /// changing the name or destroying `c`.
    pub fn smbc_getNetbiosName(c: *mut SMBCCTX) -> *const c_char;
    /// Sets the NetBIOS name configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid and `netbios_name` must point to a valid NUL-terminated string.
    pub fn smbc_setNetbiosName(c: *mut SMBCCTX, netbios_name: *const c_char);
    /// Returns the workgroup configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid. The returned pointer must not be modified or freed and is invalidated by
    /// changing the workgroup or destroying `c`.
    pub fn smbc_getWorkgroup(c: *mut SMBCCTX) -> *const c_char;
    /// Sets the workgroup configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid and `workgroup` must point to a valid NUL-terminated string.
    pub fn smbc_setWorkgroup(c: *mut SMBCCTX, workgroup: *const c_char);
    /// Returns the username configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid. The returned pointer must not be modified or freed and is invalidated by
    /// changing the username or destroying `c`.
    pub fn smbc_getUser(c: *mut SMBCCTX) -> *const c_char;
    /// Sets the username configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid and `user` must point to a valid NUL-terminated string.
    pub fn smbc_setUser(c: *mut SMBCCTX, user: *const c_char);
    /// Returns the timeout configured for `c` in milliseconds.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getTimeout(c: *mut SMBCCTX) -> c_int;
    /// Sets the timeout for `c` in milliseconds.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_setTimeout(c: *mut SMBCCTX, timeout: c_int);
    /// Returns the TCP port configured for `c`, or zero for the native default.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getPort(c: *mut SMBCCTX) -> u16;
    /// Sets the TCP port used by `c`, where zero selects the native default.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_setPort(c: *mut SMBCCTX, port: u16);
    /// Returns whether full SMB time attribute names are enabled for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionFullTimeNames(c: *mut SMBCCTX) -> smbc_bool;
    /// Enables or disables full SMB time attribute names for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_setOptionFullTimeNames(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns the user data pointer stored in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionUserData(c: *mut SMBCCTX) -> *mut c_void;
    /// Stores an opaque user data pointer in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer. The caller must ensure the pointed-to data
    /// remains valid for any native code that retrieves or uses it.
    pub fn smbc_setOptionUserData(c: *mut SMBCCTX, user_data: *mut c_void);
    /// Returns whether the password configured for `c` is an NT hash.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionUseNTHash(c: *mut SMBCCTX) -> smbc_bool;
    /// Marks the password configured for `c` as an NT hash when enabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_setOptionUseNTHash(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether native debug output is written to standard error for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionDebugToStderr(c: *mut SMBCCTX) -> smbc_bool;
    /// Controls whether native debug output is written to standard error.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionDebugToStderr(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns the file-open sharing mode configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionOpenShareMode(c: *mut SMBCCTX) -> smbc_share_mode;
    /// Sets the file-open sharing mode for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized context and `share_mode` must be supported.
    pub fn smbc_setOptionOpenShareMode(c: *mut SMBCCTX, share_mode: smbc_share_mode);
    /// Returns the SMB encryption policy configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionSmbEncryptionLevel(c: *mut SMBCCTX) -> smbc_smb_encrypt_level;
    /// Sets the SMB encryption policy for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized context and `level` must be supported.
    pub fn smbc_setOptionSmbEncryptionLevel(c: *mut SMBCCTX, level: smbc_smb_encrypt_level);
    /// Returns whether path matching is case-sensitive for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionCaseSensitive(c: *mut SMBCCTX) -> smbc_bool;
    /// Controls case-sensitive path matching for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionCaseSensitive(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns the maximum local master browser query count configured for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionBrowseMaxLmbCount(c: *mut SMBCCTX) -> c_int;
    /// Sets the maximum local master browser query count for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionBrowseMaxLmbCount(c: *mut SMBCCTX, count: c_int);
    /// Returns whether URL encoding is enabled for directory-entry names in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionUrlEncodeReaddirEntries(c: *mut SMBCCTX) -> smbc_bool;
    /// Controls URL encoding of directory-entry names for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionUrlEncodeReaddirEntries(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether each server connection is restricted to one share.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionOneSharePerServer(c: *mut SMBCCTX) -> smbc_bool;
    /// Restricts each server connection to one share when enabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionOneSharePerServer(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether Kerberos authentication is enabled for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionUseKerberos(c: *mut SMBCCTX) -> smbc_bool;
    /// Controls whether Kerberos authentication is attempted for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionUseKerberos(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether authentication falls back after Kerberos fails.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionFallbackAfterKerberos(c: *mut SMBCCTX) -> smbc_bool;
    /// Controls fallback after Kerberos authentication fails.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionFallbackAfterKerberos(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether automatic anonymous authentication is disabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionNoAutoAnonymousLogin(c: *mut SMBCCTX) -> smbc_bool;
    /// Prevents automatic anonymous authentication when enabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionNoAutoAnonymousLogin(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether Kerberos uses the credential cache.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    pub fn smbc_getOptionUseCCache(c: *mut SMBCCTX) -> smbc_bool;
    /// Controls whether Kerberos uses the credential cache.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    pub fn smbc_setOptionUseCCache(c: *mut SMBCCTX, b: smbc_bool);
    /// Returns whether POSIX extensions are enabled for `c`.
    ///
    /// Available when the `abi-0-8` feature is enabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer.
    #[cfg(feature = "abi-0-8")]
    pub fn smbc_getOptionPosixExtensions(c: *mut SMBCCTX) -> smbc_bool;
    /// Enables or disables POSIX extensions for `c`.
    ///
    /// Available when the `abi-0-8` feature is enabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized native context pointer.
    #[cfg(feature = "abi-0-8")]
    pub fn smbc_setOptionPosixExtensions(c: *mut SMBCCTX, b: smbc_bool);
    /// Sets the minimum and maximum SMB dialects offered during protocol negotiation.
    ///
    /// Each protocol name must be a NUL-terminated Samba dialect string such as `NT1`,
    /// `SMB2_02`, or `SMB3_11`. A null pointer keeps the corresponding `smb.conf` value.
    /// Returns a non-zero value on success and `0` when a protocol name is not recognized.
    ///
    /// Available since Samba 4.10 (libsmbclient ABI 0.5). The call takes effect only when it
    /// is issued before [`smbc_init_context`].
    ///
    /// # Safety
    ///
    /// `c` must be a valid, uninitialized [`SMBCCTX`]. Each non-null protocol pointer must point
    /// to a NUL-terminated, valid Samba dialect string. This call must be issued before
    /// [`smbc_init_context`].
    pub fn smbc_setOptionProtocols(
        c: *mut SMBCCTX,
        min_protocol: *const c_char,
        max_protocol: *const c_char,
    ) -> smbc_bool;
    /// Installs the context-aware authentication callback for `c`.
    ///
    /// # Safety
    ///
    /// `c` must be valid and uninitialized. The callback must uphold the native callback contract.
    pub fn smbc_setFunctionAuthDataWithContext(
        c: *mut SMBCCTX,
        _fn: smbc_get_auth_data_with_context_fn,
    );
    /// Returns the file-open callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionOpen(c: *mut SMBCCTX) -> smbc_open_fn;
    /// Returns the file-creation callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionCreat(c: *mut SMBCCTX) -> smbc_creat_fn;
    /// Returns the file-read callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionRead(c: *mut SMBCCTX) -> smbc_read_fn;
    /// Returns the file-write callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionWrite(c: *mut SMBCCTX) -> smbc_write_fn;
    /// Returns the file-splicing callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionSplice(c: *mut SMBCCTX) -> smbc_splice_fn;
    /// Returns the file-removal callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionUnlink(c: *mut SMBCCTX) -> smbc_unlink_fn;
    /// Returns the entry-rename callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionRename(c: *mut SMBCCTX) -> smbc_rename_fn;
    /// Returns the file-seek callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionLseek(c: *mut SMBCCTX) -> smbc_lseek_fn;
    /// Returns the path-metadata callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionStat(c: *mut SMBCCTX) -> smbc_stat_fn;
    /// Returns the open-file metadata callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionFstat(c: *mut SMBCCTX) -> smbc_fstat_fn;
    /// Returns the file-truncation callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionFtruncate(c: *mut SMBCCTX) -> smbc_ftruncate_fn;
    /// Returns the filesystem-statistics callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionStatVFS(c: *mut SMBCCTX) -> smbc_statvfs_fn;
    /// Returns the open-file filesystem-statistics callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionFstatVFS(c: *mut SMBCCTX) -> smbc_fstatvfs_fn;
    /// Returns the file-close callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionClose(c: *mut SMBCCTX) -> smbc_close_fn;
    /// Returns the directory-open callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionOpendir(c: *mut SMBCCTX) -> smbc_opendir_fn;
    /// Returns the directory-close callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionClosedir(c: *mut SMBCCTX) -> smbc_closedir_fn;
    /// Returns the directory-read callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionReaddir(c: *mut SMBCCTX) -> smbc_readdir_fn;
    /// Returns the extended directory-read callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionReaddirPlus(c: *mut SMBCCTX) -> smbc_readdirplus_fn;
    /// Returns the extended directory-read callback that also accepts a `stat` buffer.
    ///
    /// Available when the `abi-0-6` feature is enabled.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    #[cfg(feature = "abi-0-6")]
    pub fn smbc_getFunctionReaddirPlus2(c: *mut SMBCCTX) -> smbc_readdirplus2_fn;
    /// Returns the multiple-directory-entry callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionGetdents(c: *mut SMBCCTX) -> smbc_getdents_fn;
    /// Returns the directory-creation callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionMkdir(c: *mut SMBCCTX) -> smbc_mkdir_fn;
    /// Returns the directory-removal callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionRmdir(c: *mut SMBCCTX) -> smbc_rmdir_fn;
    /// Returns the directory-position callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionTelldir(c: *mut SMBCCTX) -> smbc_telldir_fn;
    /// Returns the directory-seek callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionLseekdir(c: *mut SMBCCTX) -> smbc_lseekdir_fn;
    /// Returns the directory-metadata callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionFstatdir(c: *mut SMBCCTX) -> smbc_fstatdir_fn;
    /// Returns the directory-notification callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionNotify(c: *mut SMBCCTX) -> smbc_notify_fn;
    /// Returns the mode-change callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionChmod(c: *mut SMBCCTX) -> smbc_chmod_fn;
    /// Returns the timestamp-update callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionUtimes(c: *mut SMBCCTX) -> smbc_utimes_fn;
    /// Returns the extended-attribute write callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionSetxattr(c: *mut SMBCCTX) -> smbc_setxattr_fn;
    /// Returns the extended-attribute read callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionGetxattr(c: *mut SMBCCTX) -> smbc_getxattr_fn;
    /// Returns the extended-attribute removal callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionRemovexattr(c: *mut SMBCCTX) -> smbc_removexattr_fn;
    /// Returns the extended-attribute listing callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionListxattr(c: *mut SMBCCTX) -> smbc_listxattr_fn;
    /// Returns the file-printing callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionPrintFile(c: *mut SMBCCTX) -> smbc_print_file_fn;
    /// Returns the print-job opening callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionOpenPrintJob(c: *mut SMBCCTX) -> smbc_open_print_job_fn;
    /// Returns the print-job listing callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionListPrintJobs(c: *mut SMBCCTX) -> smbc_list_print_jobs_fn;
    /// Returns the print-job removal callback installed in `c`.
    ///
    /// # Safety
    ///
    /// `c` must be a valid, initialized native context pointer.
    pub fn smbc_getFunctionUnlinkPrintJob(c: *mut SMBCCTX) -> smbc_unlink_print_job_fn;
    /// Allocates a new, uninitialized native SMB context.
    ///
    /// Returns null and sets `errno` to `ENOMEM` when allocation fails.
    ///
    /// # Safety
    ///
    /// A non-null pointer must be passed to [`smbc_init_context`] before use and eventually passed
    /// exactly once to [`smbc_free_context`].
    pub fn smbc_new_context() -> *mut SMBCCTX;
    /// Attempts to free `context` and optionally shuts down its connections.
    ///
    /// Returns zero on success. Returns one and sets `errno` to `EBUSY` if resources remain in use
    /// when `shutdown_ctx` is zero, or to `EBADF` if `context` is null.
    ///
    /// # Safety
    ///
    /// `context` must be a live pointer allocated by [`smbc_new_context`] and not previously freed.
    /// It remains owned by the caller when this function returns one.
    pub fn smbc_free_context(context: *mut SMBCCTX, shutdown_ctx: c_int) -> c_int;
    /// Sets fallback credentials used by `libsmbclient` for DFS referrals.
    ///
    /// # Safety
    ///
    /// `c` must be a valid native context pointer. Each non-null credential pointer must refer to
    /// a valid NUL-terminated string for the duration of the call.
    pub fn smbc_set_credentials_with_fallback(
        c: *mut SMBCCTX,
        workgroup: *const c_char,
        user: *const c_char,
        password: *const c_char,
    );
    /// Initializes a newly allocated native SMB context.
    ///
    /// Returns `context` on success. Returns null and sets `errno` to `EBADF`, `ENOMEM`, or `ENOENT`
    /// for a null context, allocation failure, or an unreadable Samba configuration, respectively.
    ///
    /// # Safety
    ///
    /// `context` must be a live, uninitialized pointer returned by [`smbc_new_context`]. On failure,
    /// the caller still owns it and must pass it to [`smbc_free_context`].
    pub fn smbc_init_context(context: *mut SMBCCTX) -> *mut SMBCCTX;
    /// Returns the linked `libsmbclient` version string.
    ///
    /// # Safety
    ///
    /// The returned pointer is borrowed static storage and must not be modified or freed.
    pub fn smbc_version() -> *const c_char;
}

#[cfg(test)]
mod tests {
    use std::sync::atomic::{AtomicBool, Ordering};

    use libc::{c_char, c_int, c_void};
    use serial_test::serial;

    use super::*;

    fn with_context(test: impl FnOnce(*mut SMBCCTX)) {
        unsafe {
            let context = smbc_new_context();
            assert!(!context.is_null());
            test(context);
            assert_eq!(smbc_free_context(context, 1), 0);
        }
    }

    extern "C" fn record_log(private_ptr: *mut c_void, _level: c_int, _message: *const c_char) {
        unsafe { (&*private_ptr.cast::<AtomicBool>()).store(true, Ordering::SeqCst) };
    }

    #[test]
    #[serial]
    fn treats_smbc_context_as_opaque() {
        with_context(|context| assert!(!context.is_null()));
    }

    #[test]
    fn uses_fixed_width_file_info_size() {
        let info = libsmb_file_info {
            size: u64::MAX,
            ..Default::default()
        };
        assert_eq!(info.size, u64::MAX);
        assert_eq!(std::mem::size_of_val(&info.size), 8);
    }

    #[test]
    fn uses_signed_encryption_level() {
        let level: smbc_smb_encrypt_level = -1;
        assert_eq!(level, -1);
    }

    #[test]
    fn uses_const_context_string_pointers() {
        let _: unsafe extern "C" fn(*mut SMBCCTX) -> *const c_char = smbc_getNetbiosName;
        let _: unsafe extern "C" fn(*mut SMBCCTX, *const c_char) = smbc_setNetbiosName;
        let _: unsafe extern "C" fn(*mut SMBCCTX) -> *const c_char = smbc_getWorkgroup;
        let _: unsafe extern "C" fn(*mut SMBCCTX, *const c_char) = smbc_setWorkgroup;
        let _: unsafe extern "C" fn(*mut SMBCCTX) -> *const c_char = smbc_getUser;
        let _: unsafe extern "C" fn(*mut SMBCCTX, *const c_char) = smbc_setUser;
    }

    #[test]
    fn exposes_directory_entry_constants() {
        assert_eq!(SMBC_WORKGROUP, 1);
        assert_eq!(SMBC_SERVER, 2);
        assert_eq!(SMBC_FILE_SHARE, 3);
        assert_eq!(SMBC_PRINTER_SHARE, 4);
        assert_eq!(SMBC_COMMS_SHARE, 5);
        assert_eq!(SMBC_IPC_SHARE, 6);
        assert_eq!(SMBC_DIR, 7);
        assert_eq!(SMBC_FILE, 8);
        assert_eq!(SMBC_LINK, 9);
        assert_eq!(SMBC_BASE_FD, 10000);
    }

    #[test]
    fn exposes_share_and_encryption_constants() {
        assert_eq!(SMBC_SHAREMODE_DENY_DOS, 0);
        assert_eq!(SMBC_SHAREMODE_DENY_ALL, 1);
        assert_eq!(SMBC_SHAREMODE_DENY_WRITE, 2);
        assert_eq!(SMBC_SHAREMODE_DENY_READ, 3);
        assert_eq!(SMBC_SHAREMODE_DENY_NONE, 4);
        assert_eq!(SMBC_SHAREMODE_DENY_FCB, 7);
        assert_eq!(SMBC_ENCRYPTLEVEL_DEFAULT, -1);
        assert_eq!(SMBC_ENCRYPTLEVEL_NONE, 0);
        assert_eq!(SMBC_ENCRYPTLEVEL_REQUEST, 1);
        assert_eq!(SMBC_ENCRYPTLEVEL_REQUIRE, 2);
    }

    #[test]
    fn exposes_extended_attribute_constants() {
        assert_eq!(SMBC_XATTR_FLAG_CREATE, 0x1);
        assert_eq!(SMBC_XATTR_FLAG_REPLACE, 0x2);
        assert_eq!(SMBC_DOS_MODE_READONLY, 0x01);
        assert_eq!(SMBC_DOS_MODE_HIDDEN, 0x02);
        assert_eq!(SMBC_DOS_MODE_SYSTEM, 0x04);
        assert_eq!(SMBC_DOS_MODE_VOLUME_ID, 0x08);
        assert_eq!(SMBC_DOS_MODE_DIRECTORY, 0x10);
        assert_eq!(SMBC_DOS_MODE_ARCHIVE, 0x20);
    }

    #[test]
    fn exposes_vfs_feature_constants() {
        assert_eq!(SMBC_VFS_FEATURE_RDONLY, 1 << 0);
        assert_eq!(SMBC_VFS_FEATURE_DFS, 1 << 28);
        assert_eq!(SMBC_VFS_FEATURE_CASE_INSENSITIVE, 1 << 29);
        assert_eq!(SMBC_VFS_FEATURE_NO_UNIXCIFS, 1 << 30);
    }

    #[test]
    fn exposes_notification_constants() {
        assert_eq!(SMBC_NOTIFY_CHANGE_FILE_NAME, 0x001);
        assert_eq!(SMBC_NOTIFY_CHANGE_DIR_NAME, 0x002);
        assert_eq!(SMBC_NOTIFY_CHANGE_ATTRIBUTES, 0x004);
        assert_eq!(SMBC_NOTIFY_CHANGE_SIZE, 0x008);
        assert_eq!(SMBC_NOTIFY_CHANGE_LAST_WRITE, 0x010);
        assert_eq!(SMBC_NOTIFY_CHANGE_LAST_ACCESS, 0x020);
        assert_eq!(SMBC_NOTIFY_CHANGE_CREATION, 0x040);
        assert_eq!(SMBC_NOTIFY_CHANGE_EA, 0x080);
        assert_eq!(SMBC_NOTIFY_CHANGE_SECURITY, 0x100);
        assert_eq!(SMBC_NOTIFY_CHANGE_STREAM_NAME, 0x200);
        assert_eq!(SMBC_NOTIFY_CHANGE_STREAM_SIZE, 0x400);
        assert_eq!(SMBC_NOTIFY_CHANGE_STREAM_WRITE, 0x800);
        assert_eq!(SMBC_NOTIFY_ACTION_ADDED, 1);
        assert_eq!(SMBC_NOTIFY_ACTION_REMOVED, 2);
        assert_eq!(SMBC_NOTIFY_ACTION_MODIFIED, 3);
        assert_eq!(SMBC_NOTIFY_ACTION_OLD_NAME, 4);
        assert_eq!(SMBC_NOTIFY_ACTION_NEW_NAME, 5);
        assert_eq!(SMBC_NOTIFY_ACTION_ADDED_STREAM, 6);
        assert_eq!(SMBC_NOTIFY_ACTION_REMOVED_STREAM, 7);
        assert_eq!(SMBC_NOTIFY_ACTION_MODIFIED_STREAM, 8);
    }

    #[test]
    #[serial]
    fn gets_debug_level() {
        with_context(|context| unsafe {
            smbc_setDebug(context, 7);
            assert_eq!(smbc_getDebug(context), 7);
        });
    }

    #[test]
    #[serial]
    fn rejects_missing_configuration() {
        with_context(|context| unsafe {
            assert_eq!(
                smbc_setConfiguration(context, c"/definitely/missing/pavao.conf".as_ptr()),
                -1
            );
        });
    }

    #[test]
    #[serial]
    fn sets_log_callback() {
        with_context(|context| unsafe {
            let called = AtomicBool::new(false);
            let private_ptr = std::ptr::from_ref(&called).cast_mut().cast::<c_void>();
            smbc_setDebug(context, 1);
            smbc_setLogCallback(context, private_ptr, Some(record_log));
            assert_eq!(
                smbc_setConfiguration(context, c"/definitely/missing/pavao.conf".as_ptr()),
                -1
            );
            smbc_setLogCallback(context, std::ptr::null_mut(), None);
            assert!(called.load(Ordering::SeqCst));
        });
    }

    #[test]
    #[serial]
    fn gets_default_port() {
        with_context(|context| unsafe {
            assert_eq!(smbc_getPort(context), 0);
        });
    }

    #[test]
    #[serial]
    fn sets_port() {
        with_context(|context| unsafe {
            smbc_setPort(context, 445);
            assert_eq!(smbc_getPort(context), 445);
        });
    }

    #[test]
    #[serial]
    fn gets_full_time_names_option() {
        with_context(|context| unsafe {
            assert_eq!(smbc_getOptionFullTimeNames(context), 0);
        });
    }

    #[test]
    #[serial]
    fn sets_full_time_names_option() {
        with_context(|context| unsafe {
            smbc_setOptionFullTimeNames(context, 1);
            assert_eq!(smbc_getOptionFullTimeNames(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_empty_user_data() {
        with_context(|context| unsafe {
            assert!(smbc_getOptionUserData(context).is_null());
        });
    }

    #[test]
    #[serial]
    fn sets_user_data() {
        with_context(|context| unsafe {
            let mut value = 42;
            let user_data = std::ptr::from_mut(&mut value).cast::<c_void>();
            smbc_setOptionUserData(context, user_data);
            assert_eq!(smbc_getOptionUserData(context), user_data);
            smbc_setOptionUserData(context, std::ptr::null_mut());
        });
    }

    #[test]
    #[serial]
    fn gets_nt_hash_option() {
        with_context(|context| unsafe {
            assert_eq!(smbc_getOptionUseNTHash(context), 0);
        });
    }

    #[test]
    #[serial]
    fn sets_nt_hash_option() {
        with_context(|context| unsafe {
            smbc_setOptionUseNTHash(context, 1);
            assert_eq!(smbc_getOptionUseNTHash(context), 1);
        });
    }

    #[test]
    #[serial]
    fn sets_fallback_credentials() {
        with_context(|context| unsafe {
            smbc_setUser(context, c"user".as_ptr());
            smbc_set_credentials_with_fallback(
                context,
                c"WORKGROUP".as_ptr(),
                c"user".as_ptr(),
                c"password".as_ptr(),
            );
            assert_eq!(std::ffi::CStr::from_ptr(smbc_getUser(context)), c"user");
        });
    }

    #[test]
    #[serial]
    fn gets_debug_to_stderr_option() {
        with_context(|context| unsafe {
            smbc_setOptionDebugToStderr(context, 1);
            assert_eq!(smbc_getOptionDebugToStderr(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_open_share_mode_option() {
        with_context(|context| unsafe {
            smbc_setOptionOpenShareMode(context, SMBC_SHAREMODE_DENY_ALL);
            assert_eq!(
                smbc_getOptionOpenShareMode(context),
                SMBC_SHAREMODE_DENY_ALL
            );
        });
    }

    #[test]
    #[serial]
    fn gets_encryption_level_option() {
        with_context(|context| unsafe {
            smbc_setOptionSmbEncryptionLevel(context, SMBC_ENCRYPTLEVEL_REQUIRE);
            assert_eq!(
                smbc_getOptionSmbEncryptionLevel(context),
                SMBC_ENCRYPTLEVEL_REQUIRE
            );
        });
    }

    #[test]
    #[serial]
    fn gets_case_sensitive_option() {
        with_context(|context| unsafe {
            smbc_setOptionCaseSensitive(context, 1);
            assert_eq!(smbc_getOptionCaseSensitive(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_browse_max_lmb_count_option() {
        with_context(|context| unsafe {
            smbc_setOptionBrowseMaxLmbCount(context, 9);
            assert_eq!(smbc_getOptionBrowseMaxLmbCount(context), 9);
        });
    }

    #[test]
    #[serial]
    fn gets_url_encode_readdir_option() {
        with_context(|context| unsafe {
            smbc_setOptionUrlEncodeReaddirEntries(context, 1);
            assert_eq!(smbc_getOptionUrlEncodeReaddirEntries(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_one_share_per_server_option() {
        with_context(|context| unsafe {
            smbc_setOptionOneSharePerServer(context, 1);
            assert_eq!(smbc_getOptionOneSharePerServer(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_use_kerberos_option() {
        with_context(|context| unsafe {
            smbc_setOptionUseKerberos(context, 1);
            assert_eq!(smbc_getOptionUseKerberos(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_kerberos_fallback_option() {
        with_context(|context| unsafe {
            smbc_setOptionFallbackAfterKerberos(context, 1);
            assert_eq!(smbc_getOptionFallbackAfterKerberos(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_no_auto_anonymous_option() {
        with_context(|context| unsafe {
            smbc_setOptionNoAutoAnonymousLogin(context, 1);
            assert_eq!(smbc_getOptionNoAutoAnonymousLogin(context), 1);
        });
    }

    #[test]
    #[serial]
    fn gets_use_ccache_option() {
        with_context(|context| unsafe {
            smbc_setOptionUseCCache(context, 1);
            assert_eq!(smbc_getOptionUseCCache(context), 1);
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_creat() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionCreat(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_splice() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionSplice(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_fstat() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionFstat(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_fstatvfs() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionFstatVFS(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_ftruncate() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionFtruncate(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_getdents() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionGetdents(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_telldir() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionTelldir(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_lseekdir() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionLseekdir(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_fstatdir() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionFstatdir(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_notify() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionNotify(context).is_some());
        });
    }

    #[cfg(feature = "abi-0-6")]
    #[test]
    #[serial]
    fn binds_smbc_get_function_readdir_plus_2() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionReaddirPlus2(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_utimes() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionUtimes(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_setxattr() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionSetxattr(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_getxattr() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionGetxattr(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_removexattr() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionRemovexattr(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_listxattr() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionListxattr(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_open_print_job() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionOpenPrintJob(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_list_print_jobs() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionListPrintJobs(context).is_some());
        });
    }

    #[test]
    #[serial]
    fn binds_smbc_get_function_unlink_print_job() {
        with_context(|context| unsafe {
            assert!(smbc_getFunctionUnlinkPrintJob(context).is_some());
        });
    }

    #[cfg(feature = "abi-0-8")]
    #[test]
    #[serial]
    fn gets_posix_extensions_option() {
        with_context(|context| unsafe {
            let value = smbc_getOptionPosixExtensions(context);
            assert!(value == 0 || value == 1);
        });
    }

    #[cfg(feature = "abi-0-8")]
    #[test]
    #[serial]
    fn sets_posix_extensions_option() {
        with_context(|context| unsafe {
            smbc_setOptionPosixExtensions(context, 1);
            assert_eq!(smbc_getOptionPosixExtensions(context), 1);
        });
    }
}