putty-source/unix/unix.h

#ifndef PUTTY_UNIX_H
#define PUTTY_UNIX_H

#ifdef HAVE_CONFIG_H
# include "uxconfig.h" /* Space to hide it from mkfiles.pl */
#endif

#include <stdio.h>		       /* for FILENAME_MAX */
#include <stdint.h>		       /* C99 int types */
#ifndef NO_LIBDL
#include <dlfcn.h>		       /* Dynamic library loading */
#endif /*  NO_LIBDL */
#include "charset.h"
#include <sys/types.h>         /* for mode_t */

#ifdef OSX_GTK
/*
 * Assorted tweaks to various parts of the GTK front end which all
 * need to be enabled when compiling on OS X. Because I might need the
 * same tweaks on other systems in future, I don't want to
 * conditionalise all of them on OSX_GTK directly, so instead, each
 * one has its own name and we enable them all centrally here if
 * OSX_GTK is defined at configure time.
 */
#define NOT_X_WINDOWS /* of course, all the X11 stuff should be disabled */
#define NO_PTY_PRE_INIT /* OS X gets very huffy if we try to set[ug]id */
#define SET_NONBLOCK_VIA_OPENPT /* work around missing fcntl functionality */
#define OSX_META_KEY_CONFIG /* two possible Meta keys to choose from */
/* this potential one of the Meta keys needs manual handling */
#define META_MANUAL_MASK (GDK_MOD1_MASK)
#define JUST_USE_GTK_CLIPBOARD_UTF8 /* low-level gdk_selection_* fails */

#define BUILDINFO_PLATFORM_GTK "OS X (GTK)"
#define BUILDINFO_GTK

#elif defined NOT_X_WINDOWS

#define BUILDINFO_PLATFORM_GTK "Unix (pure GTK)"
#define BUILDINFO_GTK

#else

#define BUILDINFO_PLATFORM_GTK "Unix (GTK + X11)"
#define BUILDINFO_GTK

#endif

/* BUILDINFO_PLATFORM varies its expansion between the GTK and
 * pure-CLI utilities, so that Unix Plink, PSFTP etc don't announce
 * themselves incongruously as having something to do with GTK. */
#define BUILDINFO_PLATFORM_CLI "Unix"
extern const int buildinfo_gtk_relevant;
#define BUILDINFO_PLATFORM (buildinfo_gtk_relevant ? \
                            BUILDINFO_PLATFORM_GTK : BUILDINFO_PLATFORM_CLI)

char *buildinfo_gtk_version(void);

struct Filename {
    char *path;
};
FILE *f_open(const struct Filename *, char const *, int);

struct FontSpec {
    char *name;    /* may be "" to indicate no selected font at all */
};
struct FontSpec *fontspec_new(const char *name);

typedef void *Context;                 /* FIXME: probably needs changing */

extern const struct Backend_vtable pty_backend;

#define BROKEN_PIPE_ERROR_CODE EPIPE   /* used in sshshare.c */

/*
 * Under GTK, we send MA_CLICK _and_ MA_2CLK, or MA_CLICK _and_
 * MA_3CLK, when a button is pressed for the second or third time.
 */
#define MULTICLICK_ONLY_EVENT 0

/*
 * Under GTK, there is no context help available.
 */
#define HELPCTX(x) P(NULL)
#define FILTER_KEY_FILES NULL          /* FIXME */
#define FILTER_DYNLIB_FILES NULL       /* FIXME */

/*
 * Under X, selection data must not be NUL-terminated.
 */
#define SELECTION_NUL_TERMINATED 0

/*
 * Under X, copying to the clipboard terminates lines with just LF.
 */
#define SEL_NL { 10 }

/* Simple wraparound timer function */
unsigned long getticks(void);
#define GETTICKCOUNT getticks
#define TICKSPERSEC    1000	       /* we choose to use milliseconds */
#define CURSORBLINK     450	       /* no standard way to set this */

#define WCHAR wchar_t
#define BYTE unsigned char

/*
 * Unix-specific global flag
 *
 * FLAG_STDERR_TTY indicates that standard error might be a terminal and
 * might get its configuration munged, so anything trying to output plain
 * text (i.e. with newlines in it) will need to put it back into cooked
 * mode first.  Applications setting this flag should also call
 * stderr_tty_init() before messing with any terminal modes, and can call
 * premsg() before outputting text to stderr and postmsg() afterwards.
 */
#define FLAG_STDERR_TTY 0x1000

#define PLATFORM_CLIPBOARDS(X)                            \
    X(CLIP_PRIMARY, "X11 primary selection")              \
    X(CLIP_CLIPBOARD, "XDG clipboard")                    \
    X(CLIP_CUSTOM_1, "<custom#1>")                        \
    X(CLIP_CUSTOM_2, "<custom#2>")                        \
    X(CLIP_CUSTOM_3, "<custom#3>")                        \
    /* end of list */

#ifdef OSX_GTK
/* OS X has no PRIMARY selection */
#define MOUSE_SELECT_CLIPBOARD CLIP_NULL
#define MOUSE_PASTE_CLIPBOARD CLIP_LOCAL
#define CLIPNAME_IMPLICIT "Last selected text"
#define CLIPNAME_EXPLICIT "System clipboard"
#define CLIPNAME_EXPLICIT_OBJECT "system clipboard"
/* These defaults are the ones that more or less comply with the OS X
 * Human Interface Guidelines, i.e. copy/paste to the system clipboard
 * is _not_ implicit but requires a specific UI action. This is at
 * odds with all other PuTTY front ends' defaults, but on OS X there
 * is no multi-decade precedent for PuTTY working the other way. */
#define CLIPUI_DEFAULT_AUTOCOPY FALSE
#define CLIPUI_DEFAULT_MOUSE CLIPUI_IMPLICIT
#define CLIPUI_DEFAULT_INS CLIPUI_EXPLICIT
#define MENU_CLIPBOARD CLIP_CLIPBOARD
#define COPYALL_CLIPBOARDS CLIP_CLIPBOARD
#else
#define MOUSE_SELECT_CLIPBOARD CLIP_PRIMARY
#define MOUSE_PASTE_CLIPBOARD CLIP_PRIMARY
#define CLIPNAME_IMPLICIT "PRIMARY"
#define CLIPNAME_EXPLICIT "CLIPBOARD"
#define CLIPNAME_EXPLICIT_OBJECT "CLIPBOARD"
/* These defaults are the ones Unix PuTTY has historically had since
 * it was first thought of in 2002 */
#define CLIPUI_DEFAULT_AUTOCOPY FALSE
#define CLIPUI_DEFAULT_MOUSE CLIPUI_IMPLICIT
#define CLIPUI_DEFAULT_INS CLIPUI_IMPLICIT
#define MENU_CLIPBOARD CLIP_CLIPBOARD
#define COPYALL_CLIPBOARDS CLIP_PRIMARY, CLIP_CLIPBOARD
/* X11 supports arbitrary named clipboards */
#define NAMED_CLIPBOARDS
#endif

/* The per-session frontend structure managed by gtkwin.c */
struct gui_data;

/* Callback when a dialog box finishes, and a no-op implementation of it */
typedef void (*post_dialog_fn_t)(void *ctx, int result);
void trivial_post_dialog_fn(void *vctx, int result);

/* Start up a session window, with or without a preliminary config box */
void initial_config_box(Conf *conf, post_dialog_fn_t after, void *afterctx);
void new_session_window(Conf *conf, const char *geometry_string);

/* Defined in gtkmain.c */
void launch_duplicate_session(Conf *conf);
void launch_new_session(void);
void launch_saved_session(const char *str);
void session_window_closed(void);
void window_setup_error(const char *errmsg);
#ifdef MAY_REFER_TO_GTK_IN_HEADERS
GtkWidget *make_gtk_toplevel_window(Frontend *frontend);
#endif

const struct Backend_vtable *select_backend(Conf *conf);

/* Defined in gtkcomm.c */
void gtkcomm_setup(void);

/* Used to pass application-menu operations from gtkapp.c to gtkwin.c */
enum MenuAction {
    MA_COPY, MA_PASTE, MA_COPY_ALL, MA_DUPLICATE_SESSION,
    MA_RESTART_SESSION, MA_CHANGE_SETTINGS, MA_CLEAR_SCROLLBACK,
    MA_RESET_TERMINAL, MA_EVENT_LOG
};
void app_menu_action(Frontend *frontend, enum MenuAction);

/* Things pty.c needs from pterm.c */
const char *get_x_display(Frontend *frontend);
int font_dimension(Frontend *frontend, int which);/* 0 for width, 1 for height */
int get_windowid(Frontend *frontend, long *id);

/* Things gtkdlg.c needs from pterm.c */
#ifdef MAY_REFER_TO_GTK_IN_HEADERS
GtkWidget *get_window(Frontend *frontend);
enum DialogSlot {
    DIALOG_SLOT_RECONFIGURE,
    DIALOG_SLOT_NETWORK_PROMPT,
    DIALOG_SLOT_LOGFILE_PROMPT,
    DIALOG_SLOT_WARN_ON_CLOSE,
    DIALOG_SLOT_CONNECTION_FATAL,
    DIALOG_SLOT_LIMIT /* must remain last */
};
void register_dialog(Frontend *frontend, enum DialogSlot slot, GtkWidget *dialog);
void unregister_dialog(Frontend *frontend, enum DialogSlot slot);
#endif

/* Things pterm.c needs from gtkdlg.c */
#ifdef MAY_REFER_TO_GTK_IN_HEADERS
GtkWidget *create_config_box(const char *title, Conf *conf,
                             int midsession, int protcfginfo,
                             post_dialog_fn_t after, void *afterctx);
#endif
void nonfatal_message_box(void *window, const char *msg);
void about_box(void *window);
void *eventlogstuff_new(void);
void showeventlog(void *estuff, void *parentwin);
void logevent_dlg(void *estuff, const char *string);
#ifdef MAY_REFER_TO_GTK_IN_HEADERS
struct message_box_button {
    const char *title;
    char shortcut;
    int type; /* more negative means more appropriate to be the Esc action */
    int value;     /* message box's return value if this is pressed */
};
struct message_box_buttons {
    const struct message_box_button *buttons;
    int nbuttons;
};
extern const struct message_box_buttons buttons_yn, buttons_ok;
GtkWidget *create_message_box(
    GtkWidget *parentwin, const char *title, const char *msg, int minwid,
    int selectable, const struct message_box_buttons *buttons,
    post_dialog_fn_t after, void *afterctx);
#endif

/* Things pterm.c needs from {ptermm,uxputty}.c */
char *make_default_wintitle(char *hostname);

/* pterm.c needs this special function in xkeysym.c */
int keysym_to_unicode(int keysym);

/* Things uxstore.c needs from pterm.c */
char *x_get_default(const char *key);

/* Things uxstore.c provides to pterm.c */
void provide_xrm_string(char *string);

/* Things provided by uxcons.c */
struct termios;
void stderr_tty_init(void);
void premsg(struct termios *);
void postmsg(struct termios *);

/* The interface used by uxsel.c */
typedef struct uxsel_id uxsel_id;
void uxsel_init(void);
typedef void (*uxsel_callback_fn)(int fd, int event);
void uxsel_set(int fd, int rwx, uxsel_callback_fn callback);
void uxsel_del(int fd);
void select_result(int fd, int event);
int first_fd(int *state, int *rwx);
int next_fd(int *state, int *rwx);
/* The following are expected to be provided _to_ uxsel.c by the frontend */
uxsel_id *uxsel_input_add(int fd, int rwx);  /* returns an id */
void uxsel_input_remove(uxsel_id *id);

/* uxcfg.c */
struct controlbox;
void unix_setup_config_box(struct controlbox *b, int midsession, int protocol);

/* gtkcfg.c */
void gtk_setup_config_box(struct controlbox *b, int midsession, void *window);

/*
 * In the Unix Unicode layer, DEFAULT_CODEPAGE is a special value
 * which causes mb_to_wc and wc_to_mb to call _libc_ rather than
 * libcharset. That way, we can interface the various charsets
 * supported by libcharset with the one supported by mbstowcs and
 * wcstombs (which will be the character set in which stuff read
 * from the command line or config files is assumed to be encoded).
 */
#define DEFAULT_CODEPAGE 0xFFFF
#define CP_UTF8 CS_UTF8		       /* from libcharset */

#define strnicmp strncasecmp
#define stricmp strcasecmp

/* BSD-semantics version of signal(), and another helpful function */
void (*putty_signal(int sig, void (*func)(int)))(int);
void block_signal(int sig, int block_it);

/* uxmisc.c */
void cloexec(int);
void noncloexec(int);
int nonblock(int);
int no_nonblock(int);
char *make_dir_and_check_ours(const char *dirname);
char *make_dir_path(const char *path, mode_t mode);

/*
 * Exports from unicode.c.
 */
struct unicode_data;
int init_ucs(struct unicode_data *ucsdata, char *line_codepage,
	     int utf8_override, int font_charset, int vtmode);

/*
 * Spare function exported directly from uxnet.c.
 */
void *sk_getxdmdata(Socket sock, int *lenp);

/*
 * General helpful Unix stuff: more helpful version of the FD_SET
 * macro, which also handles maxfd.
 */
#define FD_SET_MAX(fd, max, set) do { \
    FD_SET(fd, &set); \
    if (max < fd + 1) max = fd + 1; \
} while (0)

/*
 * Exports from uxser.c.
 */
extern const struct Backend_vtable serial_backend;

/*
 * uxpeer.c, wrapping getsockopt(SO_PEERCRED).
 */
int so_peercred(int fd, int *pid, int *uid, int *gid);

/*
 * Default font setting, which can vary depending on NOT_X_WINDOWS.
 */
#ifdef NOT_X_WINDOWS
#define DEFAULT_GTK_FONT "client:Monospace 12"
#else
#define DEFAULT_GTK_FONT "server:fixed"
#endif

#endif