src/filemanager/chown.c

src/filemanager/chown.c
Manual pages: mc • mcdiff • mcedit • mcview
/* */
This source file includes following definitions.
chown_init
chown_refresh
chown_bg_callback
chown_dlg_create
chown_done
try_chown
do_chown
apply_chowns
chown_cmd
   1 /*
   2    Chown command -- for the Midnight Commander
   3 
   4    Copyright (C) 1994-2025
   5    Free Software Foundation, Inc.
   6 
   7    This file is part of the Midnight Commander.
   8 
   9    The Midnight Commander is free software: you can redistribute it
  10    and/or modify it under the terms of the GNU General Public License as
  11    published by the Free Software Foundation, either version 3 of the License,
  12    or (at your option) any later version.
  13 
  14    The Midnight Commander is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18 
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <https://www.gnu.org/licenses/>.
  21  */
  22 
  23 /** \file chown.c
  24  *  \brief Source: chown command
  25  */
  26 
  27 #include <config.h>
  28 
  29 #include <errno.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <pwd.h>
  33 #include <grp.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <unistd.h>
  37 
  38 #include "lib/global.h"
  39 
  40 #include "lib/tty/tty.h"
  41 #include "lib/skin.h"
  42 #include "lib/vfs/vfs.h"
  43 #include "lib/strutil.h"
  44 #include "lib/util.h"
  45 #include "lib/widget.h"
  46 
  47 #include "src/setup.h"  // panels_options
  48 #include "src/util.h"   // file_error_message()
  49 
  50 #include "cmd.h"  // chown_cmd()
  51 
  52 /*** global variables ****************************************************************************/
  53 
  54 /*** file scope macro definitions ****************************************************************/
  55 
  56 #define GH                  12
  57 #define GW                  21
  58 
  59 #define BUTTONS             5
  60 
  61 #define B_SETALL            B_USER
  62 #define B_SETUSR            (B_USER + 1)
  63 #define B_SETGRP            (B_USER + 2)
  64 
  65 #define LABELS              5
  66 
  67 #define chown_label(n, txt) label_set_text (chown_label[n].l, txt)
  68 
  69 /*** file scope type declarations ****************************************************************/
  70 
  71 /*** forward declarations (file scope functions) *************************************************/
  72 
  73 /*** file scope variables ************************************************************************/
  74 
  75 static struct
  76 {
  77     int ret_cmd;
  78     button_flags_t flags;
  79     int y;
  80     int len;
  81     const char *text;
  82 } chown_but[BUTTONS] = {
  83     { B_SETALL, NORMAL_BUTTON, 5, 0, N_ ("Set &all") },
  84     { B_SETGRP, NORMAL_BUTTON, 5, 0, N_ ("Set &groups") },
  85     { B_SETUSR, NORMAL_BUTTON, 5, 0, N_ ("Set &users") },
  86     { B_ENTER, DEFPUSH_BUTTON, 3, 0, N_ ("&Set") },
  87     { B_CANCEL, NORMAL_BUTTON, 3, 0, N_ ("&Cancel") },
  88 };
  89 
  90 /* summary length of three buttons */
  91 static int blen = 0;
  92 
  93 static struct
  94 {
  95     int y;
  96     WLabel *l;
  97 } chown_label[LABELS] = {
  98     { 4, NULL }, { 6, NULL }, { 8, NULL }, { 10, NULL }, { 12, NULL },
  99 };
 100 
 101 static int current_file;
 102 static gboolean ignore_all;
 103 
 104 static WListbox *l_user, *l_group;
 105 
 106 /* --------------------------------------------------------------------------------------------- */
 107 /*** file scope functions ************************************************************************/
 108 /* --------------------------------------------------------------------------------------------- */
 109 
 110 static void
 111 chown_init (void)
     /*   */
 112 {
 113     static gboolean i18n = FALSE;
 114     int i;
 115 
 116     if (i18n)
 117         return;
 118 
 119     i18n = TRUE;
 120 
 121 #ifdef ENABLE_NLS
 122     for (i = 0; i < BUTTONS; i++)
 123         chown_but[i].text = _ (chown_but[i].text);
 124 #endif
 125 
 126     for (i = 0; i < BUTTONS; i++)
 127     {
 128         chown_but[i].len = str_term_width1 (chown_but[i].text) + 3;  // [], spaces and w/o &
 129         if (chown_but[i].flags == DEFPUSH_BUTTON)
 130             chown_but[i].len += 2;  // <>
 131 
 132         if (i < BUTTONS - 2)
 133             blen += chown_but[i].len;
 134     }
 135 
 136     blen += 2;
 137 }
 138 
 139 /* --------------------------------------------------------------------------------------------- */
 140 
 141 static void
 142 chown_refresh (const Widget *h)
     /*   */
 143 {
 144     int y = 3;
 145     int x = 7 + GW * 2;
 146 
 147     tty_setcolor (COLOR_NORMAL);
 148 
 149     widget_gotoyx (h, y + 0, x);
 150     tty_print_string (_ ("Name"));
 151     widget_gotoyx (h, y + 2, x);
 152     tty_print_string (_ ("Owner name"));
 153     widget_gotoyx (h, y + 4, x);
 154     tty_print_string (_ ("Group name"));
 155     widget_gotoyx (h, y + 6, x);
 156     tty_print_string (_ ("Size"));
 157     widget_gotoyx (h, y + 8, x);
 158     tty_print_string (_ ("Permission"));
 159 }
 160 
 161 /* --------------------------------------------------------------------------------------------- */
 162 
 163 static cb_ret_t
 164 chown_bg_callback (Widget *w, Widget *sender, widget_msg_t msg, int parm, void *data)
     /*   */
 165 {
 166     switch (msg)
 167     {
 168     case MSG_DRAW:
 169         frame_callback (w, NULL, MSG_DRAW, 0, NULL);
 170         chown_refresh (WIDGET (w->owner));
 171         return MSG_HANDLED;
 172 
 173     default:
 174         return frame_callback (w, sender, msg, parm, data);
 175     }
 176 }
 177 
 178 /* --------------------------------------------------------------------------------------------- */
 179 
 180 static WDialog *
 181 chown_dlg_create (WPanel *panel)
     /*   */
 182 {
 183     int single_set;
 184     WDialog *ch_dlg;
 185     WGroup *g;
 186     int lines, cols;
 187     int i, y;
 188     struct passwd *l_pass;
 189     struct group *l_grp;
 190 
 191     single_set = (panel->marked < 2) ? 3 : 0;
 192     lines = GH + 4 + (single_set != 0 ? 2 : 4);
 193     cols = GW * 3 + 2 + 6;
 194 
 195     ch_dlg = dlg_create (TRUE, 0, 0, lines, cols, WPOS_CENTER, FALSE, dialog_colors, NULL, NULL,
 196                          "[Chown]", _ ("Chown command"));
 197     g = GROUP (ch_dlg);
 198 
 199     // draw background
 200     ch_dlg->bg->callback = chown_bg_callback;
 201 
 202     group_add_widget (g, groupbox_new (2, 3, GH, GW, _ ("User name")));
 203     l_user = listbox_new (3, 4, GH - 2, GW - 2, FALSE, NULL);
 204     group_add_widget (g, l_user);
 205     // add field for unknown names (numbers)
 206     listbox_add_item (l_user, LISTBOX_APPEND_AT_END, 0, _ ("<Unknown user>"), NULL, FALSE);
 207     // get and put user names in the listbox
 208     setpwent ();
 209     while ((l_pass = getpwent ()) != NULL)
 210         listbox_add_item (l_user, LISTBOX_APPEND_SORTED, 0, l_pass->pw_name, NULL, FALSE);
 211     endpwent ();
 212 
 213     group_add_widget (g, groupbox_new (2, 4 + GW, GH, GW, _ ("Group name")));
 214     l_group = listbox_new (3, 5 + GW, GH - 2, GW - 2, FALSE, NULL);
 215     group_add_widget (g, l_group);
 216     // add field for unknown names (numbers)
 217     listbox_add_item (l_group, LISTBOX_APPEND_AT_END, 0, _ ("<Unknown group>"), NULL, FALSE);
 218     // get and put group names in the listbox
 219     setgrent ();
 220     while ((l_grp = getgrent ()) != NULL)
 221         listbox_add_item (l_group, LISTBOX_APPEND_SORTED, 0, l_grp->gr_name, NULL, FALSE);
 222     endgrent ();
 223 
 224     group_add_widget (g, groupbox_new (2, 5 + GW * 2, GH, GW, _ ("File")));
 225     // add widgets for the file information
 226     for (i = 0; i < LABELS; i++)
 227     {
 228         chown_label[i].l = label_new (chown_label[i].y, 7 + GW * 2, NULL);
 229         group_add_widget (g, chown_label[i].l);
 230     }
 231 
 232     if (single_set == 0)
 233     {
 234         int x;
 235 
 236         group_add_widget (g, hline_new (lines - chown_but[0].y - 1, -1, -1));
 237 
 238         y = lines - chown_but[0].y;
 239         x = (cols - blen) / 2;
 240 
 241         for (i = 0; i < BUTTONS - 2; i++)
 242         {
 243             group_add_widget (g,
 244                               button_new (y, x, chown_but[i].ret_cmd, chown_but[i].flags,
 245                                           chown_but[i].text, NULL));
 246             x += chown_but[i].len + 1;
 247         }
 248     }
 249 
 250     i = BUTTONS - 2;
 251     y = lines - chown_but[i].y;
 252     group_add_widget (g, hline_new (y - 1, -1, -1));
 253     group_add_widget (g,
 254                       button_new (y, WIDGET (ch_dlg)->rect.cols / 2 - chown_but[i].len,
 255                                   chown_but[i].ret_cmd, chown_but[i].flags, chown_but[i].text,
 256                                   NULL));
 257     i++;
 258     group_add_widget (g,
 259                       button_new (y, WIDGET (ch_dlg)->rect.cols / 2 + 1, chown_but[i].ret_cmd,
 260                                   chown_but[i].flags, chown_but[i].text, NULL));
 261 
 262     // select first listbox
 263     widget_select (WIDGET (l_user));
 264 
 265     return ch_dlg;
 266 }
 267 
 268 /* --------------------------------------------------------------------------------------------- */
 269 
 270 static void
 271 chown_done (gboolean need_update)
     /*   */
 272 {
 273     if (need_update)
 274         update_panels (UP_OPTIMIZE, UP_KEEPSEL);
 275     repaint_screen ();
 276 }
 277 
 278 /* --------------------------------------------------------------------------------------------- */
 279 
 280 static gboolean
 281 try_chown (const vfs_path_t *p, uid_t u, gid_t g)
     /*   */
 282 {
 283     const char *fname = NULL;
 284 
 285     while (mc_chown (p, u, g) == -1 && !ignore_all)
 286     {
 287         int my_errno = errno;
 288 
 289         if (fname == NULL)
 290             fname = x_basename (vfs_path_as_str (p));
 291 
 292         errno = my_errno;  // restore errno for file_error()
 293 
 294         switch (file_error (NULL, TRUE, _ ("Cannot chown\n%sn%s"), fname))
 295         {
 296         case FILE_IGNORE:
 297             // try next file
 298             return TRUE;
 299 
 300         case FILE_IGNORE_ALL:
 301             ignore_all = TRUE;
 302             // try next file
 303             return TRUE;
 304 
 305         case FILE_RETRY:
 306             // retry this file
 307             break;
 308 
 309         case FILE_ABORT:
 310         default:
 311             // stop remain files processing
 312             return FALSE;
 313         }
 314     }
 315 
 316     return TRUE;
 317 }
 318 
 319 /* --------------------------------------------------------------------------------------------- */
 320 
 321 static gboolean
 322 do_chown (WPanel *panel, const vfs_path_t *p, uid_t u, gid_t g)
     /*   */
 323 {
 324     gboolean ret;
 325 
 326     ret = try_chown (p, u, g);
 327 
 328     do_file_mark (panel, current_file, 0);
 329 
 330     return ret;
 331 }
 332 
 333 /* --------------------------------------------------------------------------------------------- */
 334 
 335 static void
 336 apply_chowns (WPanel *panel, vfs_path_t *vpath, uid_t u, gid_t g)
     /*   */
 337 {
 338     gboolean ok;
 339 
 340     if (!do_chown (panel, vpath, u, g))
 341         return;
 342 
 343     do
 344     {
 345         const GString *fname;
 346         struct stat sf;
 347 
 348         fname = panel_find_marked_file (panel, &current_file);
 349         vpath = vfs_path_from_str (fname->str);
 350         ok = (mc_stat (vpath, &sf) == 0);
 351 
 352         if (!ok)
 353         {
 354             // if current file was deleted outside mc -- try next file
 355             // decrease panel->marked
 356             do_file_mark (panel, current_file, 0);
 357 
 358             // try next file
 359             ok = TRUE;
 360         }
 361         else
 362             ok = do_chown (panel, vpath, u, g);
 363 
 364         vfs_path_free (vpath, TRUE);
 365     }
 366     while (ok && panel->marked != 0);
 367 }
 368 
 369 /* --------------------------------------------------------------------------------------------- */
 370 /*** public functions ****************************************************************************/
 371 /* --------------------------------------------------------------------------------------------- */
 372 
 373 void
 374 chown_cmd (WPanel *panel)
     /*   */
 375 {
 376     gboolean need_update;
 377     gboolean end_chown;
 378 
 379     chown_init ();
 380 
 381     current_file = 0;
 382     ignore_all = FALSE;
 383 
 384     do
 385     {  // do while any files remaining
 386         vfs_path_t *vpath;
 387         WDialog *ch_dlg;
 388         struct stat sf_stat;
 389         const GString *fname;
 390         int result;
 391         char buffer[BUF_TINY];
 392         uid_t new_user = (uid_t) (-1);
 393         gid_t new_group = (gid_t) (-1);
 394 
 395         do_refresh ();
 396 
 397         need_update = FALSE;
 398         end_chown = FALSE;
 399 
 400         fname = panel_get_marked_file (panel, &current_file);
 401         if (fname == NULL)
 402             break;
 403 
 404         vpath = vfs_path_from_str (fname->str);
 405 
 406         if (mc_stat (vpath, &sf_stat) != 0)
 407         {
 408             vfs_path_free (vpath, TRUE);
 409             break;
 410         }
 411 
 412         ch_dlg = chown_dlg_create (panel);
 413 
 414         // select in listboxes
 415         listbox_set_current (l_user, listbox_search_text (l_user, get_owner (sf_stat.st_uid)));
 416         listbox_set_current (l_group, listbox_search_text (l_group, get_group (sf_stat.st_gid)));
 417 
 418         chown_label (0, str_trunc (fname->str, GW - 4));
 419         chown_label (1, str_trunc (get_owner (sf_stat.st_uid), GW - 4));
 420         chown_label (2, str_trunc (get_group (sf_stat.st_gid), GW - 4));
 421         size_trunc_len (buffer, GW - 4, sf_stat.st_size, 0, panels_options.kilobyte_si);
 422         chown_label (3, buffer);
 423         chown_label (4, string_perm (sf_stat.st_mode));
 424 
 425         result = dlg_run (ch_dlg);
 426 
 427         switch (result)
 428         {
 429         case B_CANCEL:
 430             end_chown = TRUE;
 431             break;
 432 
 433         case B_ENTER:
 434         case B_SETALL:
 435         {
 436             struct group *grp;
 437             struct passwd *user;
 438             char *text;
 439 
 440             listbox_get_current (l_group, &text, NULL);
 441             grp = getgrnam (text);
 442             if (grp != NULL)
 443                 new_group = grp->gr_gid;
 444             listbox_get_current (l_user, &text, NULL);
 445             user = getpwnam (text);
 446             if (user != NULL)
 447                 new_user = user->pw_uid;
 448             if (result == B_ENTER)
 449             {
 450                 if (panel->marked <= 1)
 451                 {
 452                     // single or last file
 453                     if (mc_chown (vpath, new_user, new_group) == -1)
 454                         file_error_message (_ ("Cannot chown\n%s"), fname->str);
 455                     end_chown = TRUE;
 456                 }
 457                 else if (!try_chown (vpath, new_user, new_group))
 458                 {
 459                     // stop multiple files processing
 460                     result = B_CANCEL;
 461                     end_chown = TRUE;
 462                 }
 463             }
 464             else
 465             {
 466                 apply_chowns (panel, vpath, new_user, new_group);
 467                 end_chown = TRUE;
 468             }
 469 
 470             need_update = TRUE;
 471             break;
 472         }
 473 
 474         case B_SETUSR:
 475         {
 476             struct passwd *user;
 477             char *text;
 478 
 479             listbox_get_current (l_user, &text, NULL);
 480             user = getpwnam (text);
 481             if (user != NULL)
 482             {
 483                 new_user = user->pw_uid;
 484                 apply_chowns (panel, vpath, new_user, new_group);
 485                 need_update = TRUE;
 486                 end_chown = TRUE;
 487             }
 488             break;
 489         }
 490 
 491         case B_SETGRP:
 492         {
 493             struct group *grp;
 494             char *text;
 495 
 496             listbox_get_current (l_group, &text, NULL);
 497             grp = getgrnam (text);
 498             if (grp != NULL)
 499             {
 500                 new_group = grp->gr_gid;
 501                 apply_chowns (panel, vpath, new_user, new_group);
 502                 need_update = TRUE;
 503                 end_chown = TRUE;
 504             }
 505             break;
 506         }
 507 
 508         default:
 509             break;
 510         }
 511 
 512         if (panel->marked != 0 && result != B_CANCEL)
 513         {
 514             do_file_mark (panel, current_file, 0);
 515             need_update = TRUE;
 516         }
 517 
 518         vfs_path_free (vpath, TRUE);
 519 
 520         widget_destroy (WIDGET (ch_dlg));
 521     }
 522     while (panel->marked != 0 && !end_chown);
 523 
 524     chown_done (need_update);
 525 }
 526 
 527 /* --------------------------------------------------------------------------------------------- */
/* */
root/src/filemanager/chown.c

DEFINITIONS
