achown.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

/* Chown-advanced command -- for the Midnight Commander
   Copyright (C) 1994, 1995 Radek Doulik

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <config.h>
/* Needed for the extern declarations of integer parameters */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <grp.h>
#include <pwd.h>
#ifdef HAVE_UNISTD_H
#   include <unistd.h>
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>		/* For malloc() */
#include <errno.h>	/* For errno on SunOS systems	      */
#include "mad.h"
#include "tty.h"
#include "util.h"		/* Needed for the externs */
#include "win.h"
#include "color.h"
#include "dlg.h"
#include "widget.h"
#include "dialog.h"		/* For do_refresh() */
#include "wtools.h"		/* For init_box_colors() */
#include "key.h"		/* XCTRL and ALT macros */

#include "dir.h"
#include "panel.h"		/* Needed for the externs */
#include "file.h"
#include "chmod.h"
#include "main.h"
#include "../vfs/vfs.h"

#define BX		5
#define BY		6

#define TX              50
#define TY              2

#define BUTTONS		9

#define B_SETALL        B_USER
#define B_SKIP          B_USER + 1

#define B_OWN           B_USER + 3
#define B_GRP           B_USER + 4
#define B_OTH           B_USER + 5
#define B_OUSER         B_USER + 6
#define B_OGROUP        B_USER + 7

struct {
    int ret_cmd, flags, y, x;
    char *text;
} chown_advanced_but [BUTTONS] = {
    { B_CANCEL, NORMAL_BUTTON, 4, 55, N_("&Cancel") },
    { B_ENTER,  DEFPUSH_BUTTON,4, 45, N_("&Set") },
    { B_SKIP,   NORMAL_BUTTON, 4, 36, N_("S&kip") },
    { B_SETALL, NORMAL_BUTTON, 4, 24, N_("Set &all")},
    { B_ENTER,  NARROW_BUTTON, 0, 47, "               "},
    { B_ENTER,  NARROW_BUTTON, 0, 29, "               "},
    { B_ENTER,  NARROW_BUTTON, 0, 19, "   "},
    { B_ENTER,  NARROW_BUTTON, 0, 11, "   "},
    { B_ENTER,  NARROW_BUTTON, 0, 3, "   "},
};

WButton *b_att[3];	/* permission */
WButton *b_user, *b_group;	/* owner */

static int files_on_begin;	/* Number of files at startup */
static int flag_pos;
static int x_toggle;
static char ch_flags[11];
static char *ch_perm = "rwx";
static umode_t ch_cmode;
struct stat *sf_stat;
static int need_update;
static int end_chown;
static int current_file;
static int single_set;
static char *fname;

static void get_ownership ()
{				/* set buttons  - ownership */
    char *name_t;

    name_t = name_trunc (get_owner (sf_stat->st_uid), 15);
    memset (b_user->text, ' ', 15);
    strncpy (b_user->text, name_t, strlen (name_t));
    name_t = name_trunc (get_group (sf_stat->st_gid), 15);
    memset (b_group->text, ' ', 15);
    strncpy (b_group->text, name_t, strlen (name_t));
}


static int inc_flag_pos (int f_pos)
{
    if (flag_pos == 10) {
	flag_pos = 0;
	return 0;
    }
    flag_pos++;
    if (!(flag_pos % 3) || f_pos > 2)
	return 0;
    return 1;
}

static int dec_flag_pos (int f_pos)
{
    if (!flag_pos) {
	flag_pos = 10;
	return 0;
    }
    flag_pos--;
    if (!((flag_pos + 1) % 3) || f_pos > 2)
	return 0;
    return 1;
}

static void set_perm_by_flags (char *s, int f_p)
{
    int i;

    for (i = 0; i < 3; i++)
	if (ch_flags[f_p + i] == '+')
	    s[i] = ch_perm[i];
	else if (ch_flags[f_p + i] == '-')
	    s[i] = '-';
	else
	    s[i] = (ch_cmode & (1 << (8 - f_p - i))) ? ch_perm[i] : '-';
}

static void set_perm (char *s, int p)
{
    s[0] = (p & 4) ? 'r' : '-';
    s[1] = (p & 2) ? 'w' : '-';
    s[2] = (p & 1) ? 'x' : '-';
}

static umode_t get_perm (char *s, int base)
{
    umode_t m;

    m = 0;
    m |= (s [0] == '-') ? 0 :
	((s[0] == '+') ? (1 << (base + 2)) : (1 << (base + 2)) & ch_cmode);

    m |= (s [1] == '-') ? 0 :
	((s[1] == '+') ? (1 << (base + 1)) : (1 << (base + 1)) & ch_cmode);

    m |= (s [2] == '-') ? 0 :
	((s[2] == '+') ? (1 << base) : (1 << base) & ch_cmode);

    return m;
}

static umode_t get_mode ()
{
    umode_t m;

    m = ch_cmode ^ (ch_cmode & 0777);
    m |= get_perm (ch_flags, 6);
    m |= get_perm (ch_flags + 3, 3);
    m |= get_perm (ch_flags + 6, 0);

    return m;
}

static void print_flags (void)
{
    int i;

    attrset (COLOR_NORMAL);

    for (i = 0; i < 3; i++){
	dlg_move (ch_dlg, BY+1, 9+i);
	addch (ch_flags [i]);
    }

    for (i = 0; i < 3; i++){
	dlg_move (ch_dlg, BY + 1, 17 + i);
	addch (ch_flags [i+3]);
    }

    for (i = 0; i < 3; i++){
	dlg_move (ch_dlg, BY + 1, 25 + i);
	addch (ch_flags [i+6]);
    }

    set_perm_by_flags (b_att[0]->text, 0);
    set_perm_by_flags (b_att[1]->text, 3);
    set_perm_by_flags (b_att[2]->text, 6);

    for (i = 0; i < 15; i++){
	dlg_move (ch_dlg, BY+1, 35+i);
	addch (ch_flags[9]);
    }
    for (i = 0; i < 15; i++){
	dlg_move (ch_dlg, BY + 1, 53 + i);
	addch (ch_flags[10]);
    }
}

static void update_mode (Dlg_head * h)
{
    print_flags ();
    attrset (COLOR_NORMAL);
    dlg_move (h, BY + 2, 9);
    printw ("%12o", get_mode ());
    send_message (h, h->current->widget, WIDGET_FOCUS, 0);
}

static int l_call (void *data)
{
    return 1;
}

static int chl_callback (Dlg_head * h, int Par, int Msg)
{
    switch (Msg) {
    case DLG_DRAW:
	attrset (COLOR_NORMAL);
	dlg_erase (h);
	draw_box (h, 0, 0, 13, 17);
	break;

    case DLG_KEY:
	switch (Par) {
	case KEY_LEFT:
	case KEY_RIGHT:
	    h->ret_value = Par;
	    dlg_stop (h);
	}
    }
    return 0;
}

static void do_enter_key (Dlg_head *h, int f_pos)
{
    Dlg_head *chl_dlg;
    WListbox *chl_list;
    struct   passwd *chl_pass;
    struct   group *chl_grp;
    WLEntry  *fe;
    int      lxx, lyy, chl_end, b_pos;

    do {
	lxx = (COLS - 74) / 2 + ((f_pos == 3) ? 35 : 53);
	lyy = (LINES - 13) / 2;
	chl_end = 0;

	chl_dlg = create_dlg (lyy, lxx, 13, 17, dialog_colors, chl_callback,
			      "[Chown-advanced]", "achown_enter", DLG_NONE);

	/* get new listboxes */
	chl_list = listbox_new (1, 1, 15, 11, 0, l_call, NULL);

	listbox_add_item (chl_list, 0, 0, "<Unknown>", NULL);

	if (f_pos == 3) {
	    /* get and put user names in the listbox */
	    setpwent ();
	    while ((chl_pass = getpwent ()))
		listbox_add_item (chl_list, 0, 0, chl_pass->pw_name, NULL);
	    endpwent ();
	    fe = listbox_search_text (chl_list, get_owner (sf_stat->st_uid));
	}
	else
	{
	    /* get and put group names in the listbox */
	    setgrent ();
	    while ((chl_grp = getgrent ())) {
		listbox_add_item (chl_list, 0, 0, chl_grp->gr_name, NULL);
	    }
	    endgrent ();
	    fe = listbox_search_text (chl_list, get_group (sf_stat->st_gid));
	}

	if (fe)
	    listbox_select_entry (chl_list, fe);

	b_pos = chl_list->pos;
	add_widget (chl_dlg, chl_list);

	run_dlg (chl_dlg);

	if (b_pos != chl_list->pos){
	    int ok = 0;
	    if (f_pos == 3){
		chl_pass = getpwnam (chl_list->current->text);
		if (chl_pass){
		    ok = 1;
		    sf_stat->st_uid = chl_pass->pw_uid;
		}
	    } else {
		chl_grp = getgrnam (chl_list->current->text);
		if (chl_grp){
		    sf_stat->st_gid = chl_grp->gr_gid;
		    ok = 1;
		}
	    }
	    if (ok){
		ch_flags [f_pos + 6] = '+';
		get_ownership ();
	    }
	    dlg_focus (h);
	    if (ok)
		print_flags ();
	}
	if (chl_dlg->ret_value == KEY_LEFT){
	    if (f_pos == 4)
		chl_end = 1;
	    dlg_one_up (ch_dlg);
	    f_pos--;
	} else if (chl_dlg->ret_value == KEY_RIGHT) {
	    if (f_pos == 3)
		chl_end = 1;
	    dlg_one_down (ch_dlg);
	    f_pos++;
	}
	/* Here we used to redraw the window */
	destroy_dlg (chl_dlg);
    } while (chl_end);
}

static void chown_refresh (void)
{
    attrset (COLOR_NORMAL);
    dlg_erase (ch_dlg);

    draw_box (ch_dlg, 1, 2, 11, 70);

    dlg_move (ch_dlg, BY - 1, 8);
    addstr (_("owner"));
    dlg_move (ch_dlg, BY - 1, 16);
    addstr (_("group"));
    dlg_move (ch_dlg, BY - 1, 24);
    addstr (_("other"));

    dlg_move (ch_dlg, BY - 1, 35);