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_buttons_create
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     const char *text;
  81     WButton *button;
  82 } chown_but[BUTTONS] = {
  83     { B_SETALL, NORMAL_BUTTON, 5, N_ ("Set &all"), NULL },
  84     { B_SETGRP, NORMAL_BUTTON, 5, N_ ("Set &groups"), NULL },
  85     { B_SETUSR, NORMAL_BUTTON, 5, N_ ("Set &users"), NULL },
  86     { B_ENTER, DEFPUSH_BUTTON, 3, N_ ("&Set"), NULL },
  87     { B_CANCEL, NORMAL_BUTTON, 3, N_ ("&Cancel"), NULL },
  88 };
  89 
  90 static struct
  91 {
  92     int y;
  93     WLabel *l;
  94 } chown_label[LABELS] = {
  95     { 4, NULL }, { 6, NULL }, { 8, NULL }, { 10, NULL }, { 12, NULL },
  96 };
  97 
  98 static int current_file;
  99 static gboolean ignore_all;
 100 
 101 static WListbox *l_user, *l_group;
 102 
 103 /* --------------------------------------------------------------------------------------------- */
 104 /*** file scope functions ************************************************************************/
 105 /* --------------------------------------------------------------------------------------------- */
 106 
 107 static void
 108 chown_init (void)
     /*   */
 109 {
 110     static gboolean i18n = FALSE;
 111 
 112     if (i18n)
 113         return;
 114 
 115     i18n = TRUE;
 116 
 117 #ifdef ENABLE_NLS
 118     for (int i = 0; i < BUTTONS; i++)
 119         chown_but[i].text = _ (chown_but[i].text);
 120 #endif
 121 }
 122 
 123 /* --------------------------------------------------------------------------------------------- */
 124 
 125 static void
 126 chown_refresh (const Widget *h)
     /*   */
 127 {
 128     int y = 3;
 129     int x = 7 + GW * 2;
 130 
 131     tty_setcolor (COLOR_NORMAL);
 132 
 133     widget_gotoyx (h, y + 0, x);
 134     tty_print_string (_ ("Name"));
 135     widget_gotoyx (h, y + 2, x);
 136     tty_print_string (_ ("Owner name"));
 137     widget_gotoyx (h, y + 4, x);
 138     tty_print_string (_ ("Group name"));
 139     widget_gotoyx (h, y + 6, x);
 140     tty_print_string (_ ("Size"));
 141     widget_gotoyx (h, y + 8, x);
 142     tty_print_string (_ ("Permission"));
 143 }
 144 
 145 /* --------------------------------------------------------------------------------------------- */
 146 
 147 static cb_ret_t
 148 chown_bg_callback (Widget *w, Widget *sender, widget_msg_t msg, int parm, void *data)
     /*   */
 149 {
 150     switch (msg)
 151     {
 152     case MSG_DRAW:
 153         frame_callback (w, NULL, MSG_DRAW, 0, NULL);
 154         chown_refresh (WIDGET (w->owner));
 155         return MSG_HANDLED;
 156 
 157     default:
 158         return frame_callback (w, sender, msg, parm, data);
 159     }
 160 }
 161 
 162 /* --------------------------------------------------------------------------------------------- */
 163 
 164 static void
 165 chown_buttons_create (WGroup *g, const int first, const int last)
     /*   */
 166 {
 167     int i;
 168     int blen = 0;
 169     int x;
 170 
 171     const int y = WIDGET (g)->rect.lines - chown_but[first].y;
 172 
 173     group_add_widget (g, hline_new (y - 1, -1, -1));
 174 
 175     for (i = first; i <= last; i++)
 176     {
 177         chown_but[i].button =
 178             button_new (y, 1, chown_but[i].ret_cmd, chown_but[i].flags, chown_but[i].text, NULL);
 179         blen += button_get_width (chown_but[i].button) + 1;
 180         group_add_widget (g, chown_but[i].button);
 181     }
 182 
 183     x = WIDGET (g)->rect.x + (WIDGET (g)->rect.cols - blen) / 2;
 184 
 185     for (i = first; i <= last; i++)
 186     {
 187         WIDGET (chown_but[i].button)->rect.x = x;
 188         x += button_get_width (chown_but[i].button) + 1;
 189     }
 190 }
 191 
 192 /* --------------------------------------------------------------------------------------------- */
 193 
 194 static WDialog *
 195 chown_dlg_create (WPanel *panel)
     /*   */
 196 {
 197     int single_set;
 198     WDialog *ch_dlg;
 199     WGroup *g;
 200     int lines, cols;
 201     struct passwd *l_pass;
 202     struct group *l_grp;
 203 
 204     single_set = (panel->marked < 2) ? 3 : 0;
 205     lines = GH + 4 + (single_set != 0 ? 2 : 4);
 206     cols = GW * 3 + 2 + 6;
 207 
 208     ch_dlg = dlg_create (TRUE, 0, 0, lines, cols, WPOS_CENTER, FALSE, dialog_colors, NULL, NULL,
 209                          "[Chown]", _ ("Chown command"));
 210     g = GROUP (ch_dlg);
 211 
 212     // draw background
 213     ch_dlg->bg->callback = chown_bg_callback;
 214 
 215     group_add_widget (g, groupbox_new (2, 3, GH, GW, _ ("User name")));
 216     l_user = listbox_new (3, 4, GH - 2, GW - 2, FALSE, NULL);
 217     group_add_widget (g, l_user);
 218     // add field for unknown names (numbers)
 219     listbox_add_item (l_user, LISTBOX_APPEND_AT_END, 0, _ ("<Unknown user>"), NULL, FALSE);
 220     // get and put user names in the listbox
 221     setpwent ();
 222     while ((l_pass = getpwent ()) != NULL)
 223         listbox_add_item (l_user, LISTBOX_APPEND_SORTED, 0, l_pass->pw_name, NULL, FALSE);
 224     endpwent ();
 225 
 226     group_add_widget (g, groupbox_new (2, 4 + GW, GH, GW, _ ("Group name")));
 227     l_group = listbox_new (3, 5 + GW, GH - 2, GW - 2, FALSE, NULL);
 228     group_add_widget (g, l_group);
 229     // add field for unknown names (numbers)
 230     listbox_add_item (l_group, LISTBOX_APPEND_AT_END, 0, _ ("<Unknown group>"), NULL, FALSE);
 231     // get and put group names in the listbox
 232     setgrent ();
 233     while ((l_grp = getgrent ()) != NULL)
 234         listbox_add_item (l_group, LISTBOX_APPEND_SORTED, 0, l_grp->gr_name, NULL, FALSE);
 235     endgrent ();
 236 
 237     group_add_widget (g, groupbox_new (2, 5 + GW * 2, GH, GW, _ ("File")));
 238     // add widgets for the file information
 239     for (int i = 0; i < LABELS; i++)
 240     {
 241         chown_label[i].l = label_new (chown_label[i].y, 7 + GW * 2, NULL);
 242         group_add_widget (g, chown_label[i].l);
 243     }
 244 
 245     if (single_set == 0)
 246         chown_buttons_create (g, 0, BUTTONS - 3);
 247 
 248     chown_buttons_create (g, BUTTONS - 2, BUTTONS - 1);
 249 
 250     // select first listbox
 251     widget_select (WIDGET (l_user));
 252 
 253     return ch_dlg;
 254 }
 255 
 256 /* --------------------------------------------------------------------------------------------- */
 257 
 258 static void
 259 chown_done (gboolean need_update)
     /*   */
 260 {
 261     if (need_update)
 262         update_panels (UP_OPTIMIZE, UP_KEEPSEL);
 263     repaint_screen ();
 264 }
 265 
 266 /* --------------------------------------------------------------------------------------------- */
 267 
 268 static gboolean
 269 try_chown (const vfs_path_t *p, uid_t u, gid_t g)
     /*   */
 270 {
 271     const char *fname = NULL;
 272 
 273     while (mc_chown (p, u, g) == -1 && !ignore_all)
 274     {
 275         int my_errno = errno;
 276 
 277         if (fname == NULL)
 278             fname = x_basename (vfs_path_as_str (p));
 279 
 280         errno = my_errno;  // restore errno for file_error()
 281 
 282         switch (file_error (NULL, TRUE, _ ("Cannot chown\n%sn%s"), fname))
 283         {
 284         case FILE_IGNORE:
 285             // try next file
 286             return TRUE;
 287 
 288         case FILE_IGNORE_ALL:
 289             ignore_all = TRUE;
 290             // try next file
 291             return TRUE;
 292 
 293         case FILE_RETRY:
 294             // retry this file
 295             break;
 296 
 297         case FILE_ABORT:
 298         default:
 299             // stop remain files processing
 300             return FALSE;
 301         }
 302     }
 303 
 304     return TRUE;
 305 }
 306 
 307 /* --------------------------------------------------------------------------------------------- */
 308 
 309 static gboolean
 310 do_chown (WPanel *panel, const vfs_path_t *p, uid_t u, gid_t g)
     /*   */
 311 {
 312     gboolean ret;
 313 
 314     ret = try_chown (p, u, g);
 315 
 316     do_file_mark (panel, current_file, 0);
 317 
 318     return ret;
 319 }
 320 
 321 /* --------------------------------------------------------------------------------------------- */
 322 
 323 static void
 324 apply_chowns (WPanel *panel, vfs_path_t *vpath, uid_t u, gid_t g)
     /*   */
 325 {
 326     gboolean ok;
 327 
 328     if (!do_chown (panel, vpath, u, g))
 329         return;
 330 
 331     do
 332     {
 333         const GString *fname;
 334         struct stat sf;
 335 
 336         fname = panel_find_marked_file (panel, &current_file);
 337         vpath = vfs_path_from_str (fname->str);
 338         ok = (mc_stat (vpath, &sf) == 0);
 339 
 340         if (!ok)
 341         {
 342             // if current file was deleted outside mc -- try next file
 343             // decrease panel->marked
 344             do_file_mark (panel, current_file, 0);
 345 
 346             // try next file
 347             ok = TRUE;
 348         }
 349         else
 350             ok = do_chown (panel, vpath, u, g);
 351 
 352         vfs_path_free (vpath, TRUE);
 353     }
 354     while (ok && panel->marked != 0);
 355 }
 356 
 357 /* --------------------------------------------------------------------------------------------- */
 358 /*** public functions ****************************************************************************/
 359 /* --------------------------------------------------------------------------------------------- */
 360 
 361 void
 362 chown_cmd (WPanel *panel)
     /*   */
 363 {
 364     gboolean need_update;
 365     gboolean end_chown;
 366 
 367     chown_init ();
 368 
 369     current_file = 0;
 370     ignore_all = FALSE;
 371 
 372     do
 373     {  // do while any files remaining
 374         vfs_path_t *vpath;
 375         WDialog *ch_dlg;
 376         struct stat sf_stat;
 377         const GString *fname;
 378         int result;
 379         char buffer[BUF_TINY];
 380         uid_t new_user = (uid_t) (-1);
 381         gid_t new_group = (gid_t) (-1);
 382 
 383         do_refresh ();
 384 
 385         need_update = FALSE;
 386         end_chown = FALSE;
 387 
 388         fname = panel_get_marked_file (panel, &current_file);
 389         if (fname == NULL)
 390             break;
 391 
 392         vpath = vfs_path_from_str (fname->str);
 393 
 394         if (mc_stat (vpath, &sf_stat) != 0)
 395         {
 396             vfs_path_free (vpath, TRUE);
 397             break;
 398         }
 399 
 400         ch_dlg = chown_dlg_create (panel);
 401 
 402         // select in listboxes
 403         listbox_set_current (l_user, listbox_search_text (l_user, get_owner (sf_stat.st_uid)));
 404         listbox_set_current (l_group, listbox_search_text (l_group, get_group (sf_stat.st_gid)));
 405 
 406         chown_label (0, str_trunc (fname->str, GW - 4));
 407         chown_label (1, str_trunc (get_owner (sf_stat.st_uid), GW - 4));
 408         chown_label (2, str_trunc (get_group (sf_stat.st_gid), GW - 4));
 409         size_trunc_len (buffer, GW - 4, sf_stat.st_size, 0, panels_options.kilobyte_si);
 410         chown_label (3, buffer);
 411         chown_label (4, string_perm (sf_stat.st_mode));
 412 
 413         result = dlg_run (ch_dlg);
 414 
 415         switch (result)
 416         {
 417         case B_CANCEL:
 418             end_chown = TRUE;
 419             break;
 420 
 421         case B_ENTER:
 422         case B_SETALL:
 423         {
 424             struct group *grp;
 425             struct passwd *user;
 426             char *text;
 427 
 428             listbox_get_current (l_group, &text, NULL);
 429             grp = getgrnam (text);
 430             if (grp != NULL)
 431                 new_group = grp->gr_gid;
 432             listbox_get_current (l_user, &text, NULL);
 433             user = getpwnam (text);
 434             if (user != NULL)
 435                 new_user = user->pw_uid;
 436             if (result == B_ENTER)
 437             {
 438                 if (panel->marked <= 1)
 439                 {
 440                     // single or last file
 441                     if (mc_chown (vpath, new_user, new_group) == -1)
 442                         file_error_message (_ ("Cannot chown\n%s"), fname->str);
 443                     end_chown = TRUE;
 444                 }
 445                 else if (!try_chown (vpath, new_user, new_group))
 446                 {
 447                     // stop multiple files processing
 448                     result = B_CANCEL;
 449                     end_chown = TRUE;
 450                 }
 451             }
 452             else
 453             {
 454                 apply_chowns (panel, vpath, new_user, new_group);
 455                 end_chown = TRUE;
 456             }
 457 
 458             need_update = TRUE;
 459             break;
 460         }
 461 
 462         case B_SETUSR:
 463         {
 464             struct passwd *user;
 465             char *text;
 466 
 467             listbox_get_current (l_user, &text, NULL);
 468             user = getpwnam (text);
 469             if (user != NULL)
 470             {
 471                 new_user = user->pw_uid;
 472                 apply_chowns (panel, vpath, new_user, new_group);
 473                 need_update = TRUE;
 474                 end_chown = TRUE;
 475             }
 476             break;
 477         }
 478 
 479         case B_SETGRP:
 480         {
 481             struct group *grp;
 482             char *text;
 483 
 484             listbox_get_current (l_group, &text, NULL);
 485             grp = getgrnam (text);
 486             if (grp != NULL)
 487             {
 488                 new_group = grp->gr_gid;
 489                 apply_chowns (panel, vpath, new_user, new_group);
 490                 need_update = TRUE;
 491                 end_chown = TRUE;
 492             }
 493             break;
 494         }
 495 
 496         default:
 497             break;
 498         }
 499 
 500         if (panel->marked != 0 && result != B_CANCEL)
 501         {
 502             do_file_mark (panel, current_file, 0);
 503             need_update = TRUE;
 504         }
 505 
 506         vfs_path_free (vpath, TRUE);
 507 
 508         widget_destroy (WIDGET (ch_dlg));
 509     }
 510     while (panel->marked != 0 && !end_chown);
 511 
 512     chown_done (need_update);
 513 }
 514 
 515 /* --------------------------------------------------------------------------------------------- */
/* */
root/src/filemanager/chown.c

DEFINITIONS
