gpgtar: Make --files-from and --null work as described.

* tools/gpgtar-create.c (gpgtar_create): Add args files_from and
null_names.  Improve reading from a file.
* tools/gpgtar.c: Make global vars static.
(main): Remove tests for --files-from and --null option combinations.
Pass option variables to gpgtar_create.
--

GnuPG-bug-id: 5027
Signed-off-by: Werner Koch <wk@gnupg.org>

common/stringhelp.c

@@ -213,6 +213,36 @@ trim_spaces( char *str )
     return str ;
 }
 
+
+/* Same as trim_spaces but only condider, space, tab, cr and lf as space.  */
+char *
+ascii_trim_spaces (char *str)
+{
+  char *string, *p, *mark;
+
+  string = str;
+
+  /* Find first non-ascii space character.  */
+  for (p=string; *p && ascii_isspace (*p); p++)
+    ;
+  /* Move characters.  */
+  for (mark=NULL; (*string = *p); string++, p++ )
+    {
+      if (ascii_isspace (*p))
+        {
+          if (!mark)
+            mark = string;
+        }
+      else
+        mark = NULL ;
+    }
+  if (mark)
+    *mark = '\0' ;  /* Remove trailing spaces. */
+
+  return str ;
+}
+
+
 /****************
  * remove trailing white spaces
  */

common/stringhelp.h

@@ -42,6 +42,7 @@ char *has_leading_keyword (const char *string, const char *keyword);
 const char *memistr (const void *buf, size_t buflen, const char *sub);
 char *mem2str( char *, const void *, size_t);
 char *trim_spaces( char *string );
+char *ascii_trim_spaces (char *string);
 char *trim_trailing_spaces( char *string );
 unsigned int trim_trailing_chars( unsigned char *line, unsigned len,
 					      const char *trimchars);

common/utf8conv.c

@@ -803,7 +803,7 @@ wchar_to_native (const wchar_t *string)
 }
 
 
-/* Return a malloced wide char string from an UTF-8 encoded input
+/* Return a malloced wide char string from native encoded input
  * string STRING.  Caller must free this value.  Returns NULL and sets
  * ERRNO on failure.  Calling this function with STRING set to NULL is
  * not defined.  */

tools/gpgtar-create.c

@@ -744,20 +744,39 @@ write_eof_mark (estream_t stream)
 
 /* Create a new tarball using the names in the array INPATTERN.  If
    INPATTERN is NULL take the pattern as null terminated strings from
-   stdin.  */
+   stdin or from the file specified by FILES_FROM.  If NULL_NAMES is
+   set the filenames in such a file are delimited by a binary Nul and
+   not by a LF.  */
 gpg_error_t
-gpgtar_create (char **inpattern, int encrypt, int sign)
+gpgtar_create (char **inpattern, const char *files_from, int null_names,
+               int encrypt, int sign)
 {
   gpg_error_t err = 0;
   struct scanctrl_s scanctrl_buffer;
   scanctrl_t scanctrl = &scanctrl_buffer;
   tar_header_t hdr, *start_tail;
+  estream_t files_from_stream = NULL;
   estream_t outstream = NULL;
   estream_t cipher_stream = NULL;
   int eof_seen = 0;
 
   if (!inpattern)
-    es_set_binary (es_stdin);
+    {
+      if (!files_from || !strcmp (files_from, "-"))
+        {
+          files_from = "-";
+          files_from_stream = es_stdin;
+          if (null_names)
+            es_set_binary (es_stdin);
+        }
+      else if (!(files_from_stream=es_fopen (files_from, null_names? "rb":"r")))
+        {
+          err = gpg_error_from_syserror ();
+          log_error ("error opening '%s': %s\n",
+                     files_from, gpg_strerror (err));
+          return err;
+        }
+    }
 
   memset (scanctrl, 0, sizeof *scanctrl);
   scanctrl->flist_tail = &scanctrl->flist;
@@ -788,7 +807,7 @@ gpgtar_create (char **inpattern, int encrypt, int sign)
 
           pat = xtrystrdup (pattern);
         }
-      else /* Read null delimited pattern from stdin.  */
+      else /* Read Nul or LF delimited pattern from files_from_stream.  */
         {
           int c;
           char namebuf[4096];
@@ -796,17 +815,16 @@ gpgtar_create (char **inpattern, int encrypt, int sign)
 
           for (;;)
             {
-              if ((c = es_getc (es_stdin)) == EOF)
+              if ((c = es_getc (files_from_stream)) == EOF)
                 {
-                  if (es_ferror (es_stdin))
+                  if (es_ferror (files_from_stream))
                     {
                       err = gpg_error_from_syserror ();
                       log_error ("error reading '%s': %s\n",
-                                 "[stdin]", strerror (errno));
+                                 files_from, gpg_strerror (err));
                       goto leave;
                     }
-                  /* Note: The Nul is a delimiter and not a terminator.  */
+                  c = null_names ? 0 : '\n';
-                  c = 0;
                   eof_seen = 1;
                 }
               if (n >= sizeof namebuf - 1)
@@ -815,15 +833,38 @@ gpgtar_create (char **inpattern, int encrypt, int sign)
                     {
                       skip_this = 1;
                       log_error ("error reading '%s': %s\n",
-                                 "[stdin]", "filename too long");
+                                 files_from, "filename too long");
                     }
                 }
               else
                 namebuf[n++] = c;
-              if (!c)
+
+              if (null_names)
                 {
-                  namebuf[n] = 0;
+                  if (!c)
-                  break;
+                    {
+                      namebuf[n] = 0;
+                      break;
+                    }
+                }
+              else /* Shall be LF delimited.  */
+                {
+                  if (!c)
+                    {
+                      if (!skip_this)
+                        {
+                          skip_this = 1;
+                          log_error ("error reading '%s': %s\n",
+                                     files_from, "filename with embedded Nul");
+                        }
+                    }
+                  else if ( c == '\n' )
+                    {
+                      namebuf[n] = 0;
+                      ascii_trim_spaces (namebuf);
+                      n = strlen (namebuf);
+                      break;
+                    }
                 }
             }
 
@@ -856,6 +897,9 @@ gpgtar_create (char **inpattern, int encrypt, int sign)
       xfree (pat);
     }
 
+  if (files_from_stream && files_from_stream != es_stdin)
+    es_fclose (files_from_stream);
+
   if (opt.outfile)
     {
       if (!strcmp (opt.outfile, "-"))

tools/gpgtar.c

@@ -138,10 +138,10 @@ static ARGPARSE_OPTS tar_opts[] = {
 
 
 /* Global flags.  */
-enum cmd_and_opt_values cmd = 0;
+static enum cmd_and_opt_values cmd = 0;
-int skip_crypto = 0;
+static int skip_crypto = 0;
-const char *files_from = NULL;
+static const char *files_from = NULL;
-int null_names = 0;
+static int null_names = 0;
 
 
 
@@ -434,11 +434,6 @@ main (int argc, char **argv)
   pargs.flags = ARGPARSE_FLAG_KEEP;
   parse_arguments (&pargs, opts);
 
-  if ((files_from && !null_names) || (!files_from && null_names))
-    log_error ("--files-from and --null may only be used in conjunction\n");
-  if (files_from && strcmp (files_from, "-"))
-    log_error ("--files-from only supports argument \"-\"\n");
-
   if (log_get_errorcount (0))
     exit (2);
 
@@ -476,12 +471,14 @@ main (int argc, char **argv)
     case aEncrypt:
     case aSign:
     case aSignEncrypt:
-      if ((!argc && !null_names)
+      if ((!argc && !files_from)
-          || (argc && null_names))
+          || (argc && files_from))
         usage (1);
       if (opt.filename)
         log_info ("note: ignoring option --set-filename\n");
-      err = gpgtar_create (null_names? NULL :argv,
+      err = gpgtar_create (files_from? NULL : argv,
+                           files_from,
+                           null_names,
                            !skip_crypto
                            && (cmd == aEncrypt || cmd == aSignEncrypt),
                            cmd == aSign || cmd == aSignEncrypt);

tools/gpgtar.h

@@ -130,7 +130,8 @@ gpg_error_t read_record (estream_t stream, void *record);
 gpg_error_t write_record (estream_t stream, const void *record);
 
 /*-- gpgtar-create.c --*/
-gpg_error_t gpgtar_create (char **inpattern, int encrypt, int sign);
+gpg_error_t gpgtar_create (char **inpattern, const char *files_from,
+                           int null_names, int encrypt, int sign);
 
 /*-- gpgtar-extract.c --*/
 gpg_error_t gpgtar_extract (const char *filename, int decrypt);