src/warning.c

   1 /* Warnings for GNU tar.
   2
   3    Copyright 2009, 2012-2014, 2016-2017 Free Software Foundation, Inc.
   4
   5    This file is part of GNU tar.
   6
   7    GNU tar is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    GNU tar is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <system.h>
  21 #include <argmatch.h>
  22
  23 #include "common.h"
  24
  25 static char const *const warning_args[] = {
  26   "all",
  27   "alone-zero-block",
  28   "bad-dumpdir",
  29   "cachedir",
  30   "contiguous-cast",
  31   "file-changed",
  32   "file-ignored",
  33   "file-removed",
  34   "file-shrank",
  35   "file-unchanged",
  36   "filename-with-nuls",
  37   "ignore-archive",
  38   "ignore-newer",
  39   "new-directory",
  40   "rename-directory",
  41   "symlink-cast",
  42   "timestamp",
  43   "unknown-cast",
  44   "unknown-keyword",
  45   "xdev",
  46   "decompress-program",
  47   "existing-file",
  48   "xattr-write",
  49   "record-size",
  50   "failed-read",
  51   NULL
  52 };
  53
  54 static int warning_types[] = {
  55   WARN_ALL,
  56   WARN_ALONE_ZERO_BLOCK,
  57   WARN_BAD_DUMPDIR,
  58   WARN_CACHEDIR,
  59   WARN_CONTIGUOUS_CAST,
  60   WARN_FILE_CHANGED,
  61   WARN_FILE_IGNORED,
  62   WARN_FILE_REMOVED,
  63   WARN_FILE_SHRANK,
  64   WARN_FILE_UNCHANGED,
  65   WARN_FILENAME_WITH_NULS,
  66   WARN_IGNORE_ARCHIVE,
  67   WARN_IGNORE_NEWER,
  68   WARN_NEW_DIRECTORY,
  69   WARN_RENAME_DIRECTORY,
  70   WARN_SYMLINK_CAST,
  71   WARN_TIMESTAMP,
  72   WARN_UNKNOWN_CAST,
  73   WARN_UNKNOWN_KEYWORD,
  74   WARN_XDEV,
  75   WARN_DECOMPRESS_PROGRAM,
  76   WARN_EXISTING_FILE,
  77   WARN_XATTR_WRITE,
  78   WARN_RECORD_SIZE,
  79   WARN_FAILED_READ
  80 };
  81
  82 ARGMATCH_VERIFY (warning_args, warning_types);
  83
  84 int warning_option = WARN_ALL;
  85
  86 void
  87 set_warning_option (const char *arg)
  88 {
  89   int negate = 0;
  90   int option;
  91
  92   if (strcmp (arg, "none") == 0)
  93     {
  94       warning_option = 0;
  95       return;
  96     }
  97   if (strlen (arg) > 2 && memcmp (arg, "no-", 3) == 0)
  98     {
  99       negate = 1;
 100       arg += 3;
 101     }
 102
 103   option = XARGMATCH ("--warning", arg,
 104                       warning_args, warning_types);
 105   if (negate)
 106     warning_option &= ~option;
 107   else
 108     warning_option |= option;
 109 }