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 #include <sys/stat.h>
  22 #include <time.h>
  23 #include <stdio.h>
  24
  25
  26 /*
  27  * File status query.
  28  *
  29  * Here we implement some commands (SIZE, MDTM) that share the need of calling
  30  * stat() over a given file, no matter the fields looked up.  It's handy to
  31  * merge all of them here so safety checks are not replicated.
  32  */
  33 void file_stats (int type)
  34 {
  35         int         l = 0, e;
  36         struct stat s;
  37         struct tm   t;
  38
  39         if (SS.arg == NULL)
  40         {
  41                 warning("Stat type %d without argument", type);
  42                 reply_c("501 Argument required.\r\n");
  43                 return;
  44         }
  45         expand_arg();
  46
  47         e = lstat(SS.arg, &s);
  48         if (e == -1 || !S_ISREG(s.st_mode) || !S_ISDIR(s.st_mode))
  49         {
  50                 if (e == -1)
  51                         error("Stating file %s", SS.arg);
  52                 else
  53                         warning("Path %s is not file nor directory", SS.arg);
  54                 reply_c("550 Could not stat file.\r\n");
  55                 return;
  56         }
  57
  58         switch (type)
  59         {
  60         case 0: /* MDTM */
  61                 gmtime_r(&s.st_mtime, &t);
  62                 l = snprintf(SS.aux, LINE_SIZE,
  63                             "213 %4d%02d%02d%02d%02d%02d\r\n", t.tm_year + 1900,
  64                             t.tm_mon, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec);
  65                 break;
  66
  67         case 1: /* SIZE */
  68                 l = snprintf(SS.aux, LINE_SIZE, "213 %lld\r\n",
  69                              (long long) s.st_size);
  70         }
  71
  72         reply(SS.aux, l);
  73 }
  74