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view src/nv_cmds.h @ 34394:a400c8f9506f v9.1.0123

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patch 9.1.0123: MS-Windows: system() may deadlock Commit: https://github.com/vim/vim/commit/52ecc76c7fa1865603f27bc838efaeaa03cad77c Author: GuyBrush <miguel.barro@live.com> Date: Wed Feb 21 20:16:38 2024 +0100 patch 9.1.0123: MS-Windows: system() may deadlock Problem: MS-Windows: system() may deadlock when calling binaries that expect stdin Solution: Ignore the SHELL_EXPAND flag (GuyBrush) This happens on binaries that expect stdin. For example: :echo system("xxd") will cause a deadlock. SHELL_EXPAND is a flag devoted to support the linux implementation of the backtick-expansion mechanism. On linux backtic-expansion relies in the function mch_expand_wildchars() (os_unix.c) that delegates on each specific shell (bash, sh, csh, zsh) the expansion. Basically it composes a shell command that does the expansion and redirects the output to a file and call_shell() it. On windows backtick-expansion is performed by Vim itself. On linux SHELL_EXPAND modifies how mch_call_shell_fork() (os_unix.c) works. This function: - relies on posix fork() to spawn a child process to execute a external command. - Child and parent process communicate using pipes (or pseudoterminal if available). User input (type ahead content) is processed in a loop only if !(SHELL_EXPAND || SHELL_COOKED). Though signals are used to detect Ctrl-C in all cases (the input loop is not necessary to interrupt the function). In the backtick-expansion the external command is the shell command that provides the expansion. For the child redirection: - SHELL_EXPAND replaces stdin, stdout & stderr to /dev/null. This is why the shell command composed includes redirection (otherwise output would be lost). - !SHELL_EXPAND replaces stdin, stdout & stderr with the parent created pipes (or pseudoterminal). Note that the use of SIGINT signal prevents mch_call_shell_fork() from hanging vim. On Windows mch_system_piped() (os_win32.c) (which is only used when the GUI is running) mimics mch_call_shell_fork() (os_unix.c). Win32 lacks fork() and relies on CreateProcessW() and only has pipe support (not pseudoterminal) which makes the implementation much different. But, the key idea is that windows lacks signals, the OS provides support for console apps but gvim is not one. The only way of detecting a Ctrl-C is actually processing user input (type ahead content). By ignoring the user input under SHELL_EXPAND the function can hang gvim. Ignoring SHELL_EXPAND flag has no consequence in Windows because as mentioned above it is only meaningful in linux. closes: #13988 Signed-off-by: GuyBrush <miguel.barro@live.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Wed, 21 Feb 2024 20:30:02 +0100
parents 50555279168b
children
line wrap: on
line source

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar et al.
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */
/*
 * This file defines the Normal mode commands.
 */

/*
 * When adding a Normal/Visual mode command:
 * 1. Add an entry in the table `nv_cmds[]` below.
 * 2. Run "make nvcmdidxs" to re-generate nv_cmdidxs.h.
 * 3. Add an entry in the index for Normal/Visual commands at
 *    ":help normal-index" and ":help visual-index" .
 * 4. Add documentation in ../doc/xxx.txt.  Add a tag for both the short and
 *    long name of the command.
 */

#ifdef DO_DECLARE_NVCMD

/*
 * Used when building Vim.
 */
# define NVCMD(a, b, c, d) \
	{a, b, c, d}

#ifdef FEAT_GUI
#define NV_VER_SCROLLBAR	nv_ver_scrollbar
#define NV_HOR_SCROLLBAR	nv_hor_scrollbar
#else
#define NV_VER_SCROLLBAR nv_error
#define NV_HOR_SCROLLBAR nv_error
#endif

#ifdef FEAT_GUI_TABLINE
#define NV_TABLINE	nv_tabline
#define NV_TABMENU	nv_tabmenu
#else
#define NV_TABLINE	nv_error
#define NV_TABMENU	nv_error
#endif

#ifdef FEAT_NETBEANS_INTG
#define NV_NBCMD	nv_nbcmd
#else
#define NV_NBCMD	nv_error
#endif

#ifdef FEAT_DND
#define NV_DROP		nv_drop
#else
#define NV_DROP		nv_error
#endif

/*
 * Function to be called for a Normal or Visual mode command.
 * The argument is a cmdarg_T.
 */
typedef void (*nv_func_T)(cmdarg_T *cap);

// Values for cmd_flags.
#define NV_NCH	    0x01	  // may need to get a second char
#define NV_NCH_NOP  (0x02|NV_NCH) // get second char when no operator pending
#define NV_NCH_ALW  (0x04|NV_NCH) // always get a second char
#define NV_LANG	    0x08	// second char needs language adjustment

#define NV_SS	    0x10	// may start selection
#define NV_SSS	    0x20	// may start selection with shift modifier
#define NV_STS	    0x40	// may stop selection without shift modif.
#define NV_RL	    0x80	// 'rightleft' modifies command
#define NV_KEEPREG  0x100	// don't clear regname
#define NV_NCW	    0x200	// not allowed in command-line window

/*
 * Generally speaking, every Normal mode command should either clear any
 * pending operator (with *clearop*()), or set the motion type variable
 * oap->motion_type.
 *
 * When a cursor motion command is made, it is marked as being a character or
 * line oriented motion.  Then, if an operator is in effect, the operation
 * becomes character or line oriented accordingly.
 */

/*
 * This table contains one entry for every Normal or Visual mode command.
 * The order doesn't matter, this will be sorted by the create_nvcmdidx.vim
 * script to generate the nv_cmd_idx[] lookup table.
 * It is faster when all keys from zero to '~' are present.
 */
static const struct nv_cmd
{
    int		cmd_char;	// (first) command character
    nv_func_T   cmd_func;	// function for this command
    short_u	cmd_flags;	// NV_ flags
    short	cmd_arg;	// value for ca.arg
} nv_cmds[] =

#else  // DO_DECLARE_NVCMD

/*
 * Used when creating nv_cmdidxs.h.
 */
# define NVCMD(a, b, c, d)  a
static const int nv_cmds[] =

#endif // DO_DECLARE_NVCMD
{
    NVCMD(NUL,		nv_error,	0,			0),
    NVCMD(Ctrl_A,	nv_addsub,	0,			0),
    NVCMD(Ctrl_B,	nv_page,	NV_STS,			BACKWARD),
    NVCMD(Ctrl_C,	nv_esc,		0,			TRUE),
    NVCMD(Ctrl_D,	nv_halfpage,	0,			0),
    NVCMD(Ctrl_E,	nv_scroll_line,	0,			TRUE),
    NVCMD(Ctrl_F,	nv_page,	NV_STS,			FORWARD),
    NVCMD(Ctrl_G,	nv_ctrlg,	0,			0),
    NVCMD(Ctrl_H,	nv_ctrlh,	0,			0),
    NVCMD(Ctrl_I,	nv_pcmark,	0,			0),
    NVCMD(NL,		nv_down,	0,			FALSE),
    NVCMD(Ctrl_K,	nv_error,	0,			0),
    NVCMD(Ctrl_L,	nv_clear,	0,			0),
    NVCMD(CAR,		nv_down,	0,			TRUE),
    NVCMD(Ctrl_N,	nv_down,	NV_STS,			FALSE),
    NVCMD(Ctrl_O,	nv_ctrlo,	0,			0),
    NVCMD(Ctrl_P,	nv_up,		NV_STS,			FALSE),
    NVCMD(Ctrl_Q,	nv_visual,	0,			FALSE),
    NVCMD(Ctrl_R,	nv_redo_or_register, 0,			0),
    NVCMD(Ctrl_S,	nv_ignore,	0,			0),
    NVCMD(Ctrl_T,	nv_tagpop,	NV_NCW,			0),
    NVCMD(Ctrl_U,	nv_halfpage,	0,			0),
    NVCMD(Ctrl_V,	nv_visual,	0,			FALSE),
    NVCMD(Ctrl_W,	nv_window,	0,			0),
    NVCMD(Ctrl_X,	nv_addsub,	0,			0),
    NVCMD(Ctrl_Y,	nv_scroll_line,	0,			FALSE),
    NVCMD(Ctrl_Z,	nv_suspend,	0,			0),
    NVCMD(ESC,		nv_esc,		0,			FALSE),
    NVCMD(Ctrl_BSL,	nv_normal,	NV_NCH_ALW,		0),
    NVCMD(Ctrl_RSB,	nv_ident,	NV_NCW,			0),
    NVCMD(Ctrl_HAT,	nv_hat,		NV_NCW,			0),
    NVCMD(Ctrl__,	nv_error,	0,			0),
    NVCMD(' ',		nv_right,	0,			0),
    NVCMD('!',		nv_operator,	0,			0),
    NVCMD('"',		nv_regname,	NV_NCH_NOP|NV_KEEPREG,	0),
    NVCMD('#',		nv_ident,	0,			0),
    NVCMD('$',		nv_dollar,	0,			0),
    NVCMD('%',		nv_percent,	0,			0),
    NVCMD('&',		nv_optrans,	0,			0),
    NVCMD('\'',		nv_gomark,	NV_NCH_ALW,		TRUE),
    NVCMD('(',		nv_brace,	0,			BACKWARD),
    NVCMD(')',		nv_brace,	0,			FORWARD),
    NVCMD('*',		nv_ident,	0,			0),
    NVCMD('+',		nv_down,	0,			TRUE),
    NVCMD(',',		nv_csearch,	0,			TRUE),
    NVCMD('-',		nv_up,		0,			TRUE),
    NVCMD('.',		nv_dot,		NV_KEEPREG,		0),
    NVCMD('/',		nv_search,	0,			FALSE),
    NVCMD('0',		nv_beginline,	0,			0),
    NVCMD('1',		nv_ignore,	0,			0),
    NVCMD('2',		nv_ignore,	0,			0),
    NVCMD('3',		nv_ignore,	0,			0),
    NVCMD('4',		nv_ignore,	0,			0),
    NVCMD('5',		nv_ignore,	0,			0),
    NVCMD('6',		nv_ignore,	0,			0),
    NVCMD('7',		nv_ignore,	0,			0),
    NVCMD('8',		nv_ignore,	0,			0),
    NVCMD('9',		nv_ignore,	0,			0),
    NVCMD(':',		nv_colon,	0,			0),
    NVCMD(';',		nv_csearch,	0,			FALSE),
    NVCMD('<',		nv_operator,	NV_RL,			0),
    NVCMD('=',		nv_operator,	0,			0),
    NVCMD('>',		nv_operator,	NV_RL,			0),
    NVCMD('?',		nv_search,	0,			FALSE),
    NVCMD('@',		nv_at,		NV_NCH_NOP,		FALSE),
    NVCMD('A',		nv_edit,	0,			0),
    NVCMD('B',		nv_bck_word,	0,			1),
    NVCMD('C',		nv_abbrev,	NV_KEEPREG,		0),
    NVCMD('D',		nv_abbrev,	NV_KEEPREG,		0),
    NVCMD('E',		nv_wordcmd,	0,			TRUE),
    NVCMD('F',		nv_csearch,	NV_NCH_ALW|NV_LANG,	BACKWARD),
    NVCMD('G',		nv_goto,	0,			TRUE),
    NVCMD('H',		nv_scroll,	0,			0),
    NVCMD('I',		nv_edit,	0,			0),
    NVCMD('J',		nv_join,	0,			0),
    NVCMD('K',		nv_ident,	0,			0),
    NVCMD('L',		nv_scroll,	0,			0),
    NVCMD('M',		nv_scroll,	0,			0),
    NVCMD('N',		nv_next,	0,			SEARCH_REV),
    NVCMD('O',		nv_open,	0,			0),
    NVCMD('P',		nv_put,		0,			0),
    NVCMD('Q',		nv_exmode,	NV_NCW,			0),
    NVCMD('R',		nv_Replace,	0,			FALSE),
    NVCMD('S',		nv_subst,	NV_KEEPREG,		0),
    NVCMD('T',		nv_csearch,	NV_NCH_ALW|NV_LANG,	BACKWARD),
    NVCMD('U',		nv_Undo,	0,			0),
    NVCMD('V',		nv_visual,	0,			FALSE),
    NVCMD('W',		nv_wordcmd,	0,			TRUE),
    NVCMD('X',		nv_abbrev,	NV_KEEPREG,		0),
    NVCMD('Y',		nv_abbrev,	NV_KEEPREG,		0),
    NVCMD('Z',		nv_Zet,		NV_NCH_NOP|NV_NCW,	0),
    NVCMD('[',		nv_brackets,	NV_NCH_ALW,		BACKWARD),
    NVCMD('\\',		nv_error,	0,			0),
    NVCMD(']',		nv_brackets,	NV_NCH_ALW,		FORWARD),
    NVCMD('^',		nv_beginline,	0,		    BL_WHITE | BL_FIX),
    NVCMD('_',		nv_lineop,	0,			0),
    NVCMD('`',		nv_gomark,	NV_NCH_ALW,		FALSE),
    NVCMD('a',		nv_edit,	NV_NCH,			0),
    NVCMD('b',		nv_bck_word,	0,			0),
    NVCMD('c',		nv_operator,	0,			0),
    NVCMD('d',		nv_operator,	0,			0),
    NVCMD('e',		nv_wordcmd,	0,			FALSE),
    NVCMD('f',		nv_csearch,	NV_NCH_ALW|NV_LANG,	FORWARD),
    NVCMD('g',		nv_g_cmd,	NV_NCH_ALW,		FALSE),
    NVCMD('h',		nv_left,	NV_RL,			0),
    NVCMD('i',		nv_edit,	NV_NCH,			0),
    NVCMD('j',		nv_down,	0,			FALSE),
    NVCMD('k',		nv_up,		0,			FALSE),
    NVCMD('l',		nv_right,	NV_RL,			0),
    NVCMD('m',		nv_mark,	NV_NCH_NOP,		0),
    NVCMD('n',		nv_next,	0,			0),
    NVCMD('o',		nv_open,	0,			0),
    NVCMD('p',		nv_put,		0,			0),
    NVCMD('q',		nv_record,	NV_NCH,			0),
    NVCMD('r',		nv_replace,	NV_NCH_NOP|NV_LANG,	0),
    NVCMD('s',		nv_subst,	NV_KEEPREG,		0),
    NVCMD('t',		nv_csearch,	NV_NCH_ALW|NV_LANG,	FORWARD),
    NVCMD('u',		nv_undo,	0,			0),
    NVCMD('v',		nv_visual,	0,			FALSE),
    NVCMD('w',		nv_wordcmd,	0,			FALSE),
    NVCMD('x',		nv_abbrev,	NV_KEEPREG,		0),
    NVCMD('y',		nv_operator,	0,			0),
    NVCMD('z',		nv_zet,		NV_NCH_ALW,		0),
    NVCMD('{',		nv_findpar,	0,			BACKWARD),
    NVCMD('|',		nv_pipe,	0,			0),
    NVCMD('}',		nv_findpar,	0,			FORWARD),
    NVCMD('~',		nv_tilde,	0,			0),

    // pound sign
    NVCMD(POUND,	nv_ident,	0,			0),
    NVCMD(K_MOUSEUP,	nv_mousescroll,	0,			MSCR_UP),
    NVCMD(K_MOUSEDOWN,	nv_mousescroll, 0,			MSCR_DOWN),
    NVCMD(K_MOUSELEFT,	nv_mousescroll, 0,			MSCR_LEFT),
    NVCMD(K_MOUSERIGHT, nv_mousescroll, 0,			MSCR_RIGHT),
    NVCMD(K_LEFTMOUSE,	nv_mouse,	0,			0),
    NVCMD(K_LEFTMOUSE_NM, nv_mouse,	0,			0),
    NVCMD(K_LEFTDRAG,	nv_mouse,	0,			0),
    NVCMD(K_LEFTRELEASE, nv_mouse,	0,			0),
    NVCMD(K_LEFTRELEASE_NM, nv_mouse,	0,			0),
    NVCMD(K_MOUSEMOVE,	nv_mouse,	0,			0),
    NVCMD(K_MIDDLEMOUSE, nv_mouse,	0,			0),
    NVCMD(K_MIDDLEDRAG, nv_mouse,	0,			0),
    NVCMD(K_MIDDLERELEASE, nv_mouse,	0,			0),
    NVCMD(K_RIGHTMOUSE, nv_mouse,	0,			0),
    NVCMD(K_RIGHTDRAG,	nv_mouse,	0,			0),
    NVCMD(K_RIGHTRELEASE, nv_mouse,	0,			0),
    NVCMD(K_X1MOUSE,	nv_mouse,	0,			0),
    NVCMD(K_X1DRAG,	nv_mouse,	0,			0),
    NVCMD(K_X1RELEASE,	nv_mouse,	0,			0),
    NVCMD(K_X2MOUSE,	nv_mouse,	0,			0),
    NVCMD(K_X2DRAG,	nv_mouse,	0,			0),
    NVCMD(K_X2RELEASE,	nv_mouse,	0,			0),
    NVCMD(K_IGNORE,	nv_ignore,	NV_KEEPREG,		0),
    NVCMD(K_NOP,	nv_nop,		0,			0),
    NVCMD(K_INS,	nv_edit,	0,			0),
    NVCMD(K_KINS,	nv_edit,	0,			0),
    NVCMD(K_BS,		nv_ctrlh,	0,			0),
    NVCMD(K_UP,		nv_up,		NV_SSS|NV_STS,		FALSE),
    NVCMD(K_S_UP,	nv_page,	NV_SS,			BACKWARD),
    NVCMD(K_DOWN,	nv_down,	NV_SSS|NV_STS,		FALSE),
    NVCMD(K_S_DOWN,	nv_page,	NV_SS,			FORWARD),
    NVCMD(K_LEFT,	nv_left,	NV_SSS|NV_STS|NV_RL,	0),
    NVCMD(K_S_LEFT,	nv_bck_word,	NV_SS|NV_RL,		0),
    NVCMD(K_C_LEFT,	nv_bck_word,	NV_SSS|NV_RL|NV_STS,	1),
    NVCMD(K_RIGHT,	nv_right,	NV_SSS|NV_STS|NV_RL,	0),
    NVCMD(K_S_RIGHT,	nv_wordcmd,	NV_SS|NV_RL,		FALSE),
    NVCMD(K_C_RIGHT,	nv_wordcmd,	NV_SSS|NV_RL|NV_STS,	TRUE),
    NVCMD(K_PAGEUP,	nv_page,	NV_SSS|NV_STS,		BACKWARD),
    NVCMD(K_KPAGEUP,	nv_page,	NV_SSS|NV_STS,		BACKWARD),
    NVCMD(K_PAGEDOWN,	nv_page,	NV_SSS|NV_STS,		FORWARD),
    NVCMD(K_KPAGEDOWN,	nv_page,	NV_SSS|NV_STS,		FORWARD),
    NVCMD(K_END,	nv_end,		NV_SSS|NV_STS,		FALSE),
    NVCMD(K_KEND,	nv_end,		NV_SSS|NV_STS,		FALSE),
    NVCMD(K_S_END,	nv_end,		NV_SS,			FALSE),
    NVCMD(K_C_END,	nv_end,		NV_SSS|NV_STS,		TRUE),
    NVCMD(K_HOME,	nv_home,	NV_SSS|NV_STS,		0),
    NVCMD(K_KHOME,	nv_home,	NV_SSS|NV_STS,		0),
    NVCMD(K_S_HOME,	nv_home,	NV_SS,			0),
    NVCMD(K_C_HOME,	nv_goto,	NV_SSS|NV_STS,		FALSE),
    NVCMD(K_DEL,	nv_abbrev,	0,			0),
    NVCMD(K_KDEL,	nv_abbrev,	0,			0),
    NVCMD(K_UNDO,	nv_kundo,	0,			0),
    NVCMD(K_HELP,	nv_help,	NV_NCW,			0),
    NVCMD(K_F1,		nv_help,	NV_NCW,			0),
    NVCMD(K_XF1,	nv_help,	NV_NCW,			0),
    NVCMD(K_SELECT,	nv_select,	0,			0),
    NVCMD(K_VER_SCROLLBAR, NV_VER_SCROLLBAR, 0,			0),
    NVCMD(K_HOR_SCROLLBAR, NV_HOR_SCROLLBAR, 0,			0),
    NVCMD(K_TABLINE,	NV_TABLINE,	0,			0),
    NVCMD(K_TABMENU,	NV_TABMENU,	0,			0),
    NVCMD(K_F21,	NV_NBCMD,	NV_NCH_ALW,		0),
    NVCMD(K_DROP,	NV_DROP,	NV_STS,			0),
    NVCMD(K_CURSORHOLD, nv_cursorhold,	NV_KEEPREG,		0),
    NVCMD(K_PS,		nv_edit,	0,			0),
    NVCMD(K_COMMAND,	nv_colon,	0,			0),
    NVCMD(K_SCRIPT_COMMAND, nv_colon,	0,			0),
};

// Number of commands in nv_cmds[].
#define NV_CMDS_SIZE ARRAY_LENGTH(nv_cmds)