Implement the --warning option.

[chaz/tar] / src / tar.c

diff --git a/src/tar.c b/src/tar.c
index 8c83959655b3a0301f02051e9111010b240d2c1c..b11edadd3224420883b887d0a7a6d742f840e193 100644 (file)
--- a/src/tar.c
+++ b/src/tar.c
@@ -1,7 +1,7 @@
 /* A tar (tape archiver) program.
 
    Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000,
-   2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   2001, 2003, 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
 
    Written by John Gilmore, starting 1985-08-25.
 
@@ -50,6 +50,7 @@
 #include <version-etc.h>
 #include <xstrtol.h>
 #include <stdopen.h>
+#include <priv-set.h>
 
 /* Local declarations.  */
 
@@ -327,6 +328,7 @@ enum
   UTC_OPTION,
   VERSION_OPTION,
   VOLNO_FILE_OPTION,
+  WARNING_OPTION, 
   WILDCARDS_MATCH_SLASH_OPTION,
   WILDCARDS_OPTION
 };
@@ -481,9 +483,9 @@ static struct argp_option options[] = {
   {"touch", 'm', 0, 0,
    N_("don't extract file modified time"), GRID+1 },
   {"same-owner", SAME_OWNER_OPTION, 0, 0,
-   N_("try extracting files with the same ownership"), GRID+1 },
+   N_("try extracting files with the same ownership as exists in the archive (default for superuser)"), GRID+1 },
   {"no-same-owner", NO_SAME_OWNER_OPTION, 0, 0,
-   N_("extract files as yourself"), GRID+1 },
+   N_("extract files as yourself (default for ordinary users)"), GRID+1 },
   {"numeric-owner", NUMERIC_OWNER_OPTION, 0, 0,
    N_("always use numbers for user/group names"), GRID+1 },
   {"preserve-permissions", 'p', 0, 0,
@@ -718,6 +720,8 @@ static struct argp_option options[] = {
 
   {"verbose", 'v', 0, 0,
    N_("verbosely list files processed"), GRID+1 },
+  {"warning", WARNING_OPTION, N_("KEYWORD"), 0,
+   N_("warning control"), GRID+1 },
   {"checkpoint", CHECKPOINT_OPTION, N_("NUMBER"), OPTION_ARG_OPTIONAL,
    N_("display progress messages every NUMBERth record (default 10)"),
    GRID+1 },
@@ -1182,8 +1186,9 @@ update_argv (const char *filename, struct argp_state *state)
          {
            size_t size;
 
-           WARN ((0, 0, N_("%s: file name read contains nul character"),
-                  quotearg_colon (filename)));
+           WARNOPT (WARN_FILENAME_WITH_NULS,
+                    (0, 0, N_("%s: file name read contains nul character"),
+                     quotearg_colon (filename)));
 
            /* Prepare new stack contents */
            size = obstack_object_size (&argv_stk);
@@ -1948,6 +1953,10 @@ parse_opt (int key, char *arg, struct argp_state *state)
       unquote_option = false;
       break;
 
+    case WARNING_OPTION:
+      set_warning_option (arg);
+      break;
+      
     case '0':
     case '1':
     case '2':
@@ -2454,11 +2463,14 @@ main (int argc, char **argv)
 
   obstack_init (&argv_stk);
 
-#ifdef SIGCHLD
+  /* Ensure default behavior for some signals */
+  signal (SIGPIPE, SIG_DFL);
   /* System V fork+wait does not work if SIGCHLD is ignored.  */
   signal (SIGCHLD, SIG_DFL);
-#endif
 
+  /* Try to disable the ability to unlink a directory.  */
+  priv_set_remove_linkdir ();
+  
   /* Decode options.  */
 
   decode_options (argc, argv);