file_stats.c

   1 /*
   2  * User FTP Server,  Share folders over FTP without being root.
   3  * Copyright (C) 2008  Isaac Jurado
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free Software
   7  * Foundation; either version 2 of the License, or (at your option) any later
   8  * version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  18  */
  19
  20 #include "uftps.h"
  21 #ifdef __MINGW32__
  22 #  include "hase.h"
  23 #else
  24 #  include <sys/stat.h>
  25 #  include <time.h>
  26 #endif
  27 #include <stdio.h>
  28
  29
  30 /*
  31  * File status query.
  32  *
  33  * Here we implement some commands (SIZE, MDTM) that share the need of calling
  34  * stat() over a given file, no matter the fields looked up.  It's handy to
  35  * merge all of them here so safety checks are not replicated.
  36  */
  37 void file_stats (int type)
  38 {
  39         int          l = 0, e;
  40         struct stat  s;
  41         struct tm   *t;
  42
  43         if (SS.arg == NULL)
  44         {
  45                 warning("Stat type %d without argument", type);
  46                 reply_c("501 Argument required.\r\n");
  47                 return;
  48         }
  49         expand_arg();
  50
  51         e = lstat(SS.arg, &s);
  52         if (e == -1 || (!S_ISREG(s.st_mode) && !S_ISDIR(s.st_mode)))
  53         {
  54                 if (e == -1)
  55                         error("Stating file %s", SS.arg);
  56                 else
  57                         warning("Path %s is not file nor directory", SS.arg);
  58                 reply_c("550 Could not stat file.\r\n");
  59                 return;
  60         }
  61
  62         switch (type)
  63         {
  64         case 0: /* MDTM */
  65                 t = gmtime(&s.st_mtime);
  66                 if (t == NULL)
  67                 {
  68                         error("Converting time of %s", SS.arg);
  69                         reply_c("550 Error converting time.\r\n");
  70                         return;
  71                 }
  72
  73                 l = snprintf(SS.aux, LINE_SIZE, "213 %4d%02d%02d%02d%02d%02d\r\n",
  74                              t->tm_year + 1900, t->tm_mon, t->tm_mday,
  75                              t->tm_hour, t->tm_min, t->tm_sec);
  76                 break;
  77
  78         case 1: /* SIZE */
  79 #ifdef __MINGW32__
  80                 l = snprintf(SS.aux, LINE_SIZE, "213 %I64d\r\n", s.st_size);
  81 #else
  82                 l = snprintf(SS.aux, LINE_SIZE, "213 %lld\r\n",
  83                              (long long) s.st_size);
  84 #endif
  85         }
  86
  87         reply(SS.aux, l);
  88 }
  89