tar 1.13

tests/genfile.c

@@ -0,0 +1,194 @@
+/* Generate a file containing some preset patterns.
+   Copyright © 1995, 1996, 1997 Free Software Foundation, Inc.
+   François Pinard <[email protected]>, 1995.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "system.h"
+
+#include <getopt.h>
+
+#ifndef EXIT_SUCCESS
+# define EXIT_SUCCESS 0
+#endif
+#ifndef EXIT_FAILURE
+# define EXIT_FAILURE 1
+#endif
+
+enum pattern
+{
+  DEFAULT,
+  ZEROS
+};
+
+/* The name this program was run with. */
+const char *program_name;
+
+/* If nonzero, display usage information and exit.  */
+static int show_help = 0;
+
+/* If nonzero, print the version on standard output and exit.  */
+static int show_version = 0;
+
+/* Length of file to generate.  */
+static int file_length = 0;
+
+/* Pattern to generate.  */
+static enum pattern pattern = DEFAULT;
+
+/*-----------------------------------------------.
+| Explain how to use the program, then get out.	 |
+`-----------------------------------------------*/
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    fprintf (stderr, _("Try `%s --help' for more information.\n"),
+	     program_name);
+  else
+    {
+      printf (_("Generate data files for GNU tar test suite.\n"));
+      printf (_("\
+\n\
+Usage: %s [OPTION]...\n"), program_name);
+      fputs (_("\
+If a long option shows an argument as mandatory, then it is mandatory\n\
+for the equivalent short option also.\n\
+\n\
+  -l, --file-length=LENGTH   LENGTH of generated file\n\
+  -p, --pattern=PATTERN      PATTERN is `default' or `zeros'\n\
+      --help                 display this help and exit\n\
+      --version              output version information and exit\n"),
+	     stdout);
+    }
+  exit (status);
+}
+
+/*----------------------------------------------------------------------.
+| Main program.  Decode ARGC arguments passed through the ARGV array of |
+| strings, then launch execution.				        |
+`----------------------------------------------------------------------*/
+
+/* Long options equivalences.  */
+static const struct option long_options[] =
+{
+  {"help", no_argument, &show_help, 1},
+  {"length", required_argument, NULL, 'l'},
+  {"pattern", required_argument, NULL, 'p'},
+  {"version", no_argument, &show_version, 1},
+  {0, 0, 0, 0},
+};
+
+
+const char *pattern_strings[] =
+{
+  "default",			/* 0 */
+  "zeros",			/* 1 */
+  NULL
+};
+
+int
+main (int argc, char *const *argv)
+{
+  int option_char;		/* option character */
+  int counter;			/* general purpose counter */
+
+  /* Decode command options.  */
+
+  program_name = argv[0];
+  setlocale (LC_ALL, "");
+
+  while (option_char = getopt_long (argc, argv, "l:p:", long_options, NULL),
+	 option_char != EOF)
+    switch (option_char)
+      {
+      default:
+	usage (EXIT_FAILURE);
+
+      case '\0':
+	break;
+
+      case 'l':
+	file_length = atoi (optarg);
+	break;
+
+      case 'p':
+	switch (argmatch (optarg, pattern_strings))
+	  {
+
+	  case -2:
+	    error (0, 0, _("Ambiguous pattern `%s'"), optarg);
+	    usage (EXIT_FAILURE);
+
+	  case -1:
+	    error (0, 0, _("Unknown pattern `%s'"), optarg);
+	    usage (EXIT_FAILURE);
+
+	  case 0:
+	    pattern = DEFAULT;
+	    break;
+
+	  case 1:
+	    pattern = ZEROS;
+	    break;
+	  }
+	break;
+      }
+
+  /* Process trivial options.  */
+
+  if (show_version)
+    {
+      printf ("genfile (GNU %s) %s\n", PACKAGE, VERSION);
+      fputs (_("\
+\n\
+Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.\n"),
+	     stdout);
+      fputs (_("\
+This is free software; see the source for copying conditions.  There is NO\n\
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"),
+	     stdout);
+      fputs (_("\
+\n\
+Written by François Pinard <[email protected]>.\n"),
+	     stdout);
+      exit (EXIT_SUCCESS);
+    }
+
+  if (show_help)
+    usage (EXIT_SUCCESS);
+
+  if (optind < argc)
+    usage (EXIT_FAILURE);
+
+  /* Generate file.  */
+
+  switch (pattern)
+    {
+    case DEFAULT:
+      for (counter = 0; counter < file_length; counter++)
+	putchar (counter & 255);
+      break;
+
+    case ZEROS:
+      for (counter = 0; counter < file_length; counter++)
+	putchar (0);
+      break;
+    }
+
+  exit (0);
+}