--- md5sum.c.orig	Mon May  3 19:55:37 1999
+++ md5sum.c	Sun Mar 31 22:16:35 2002
@@ -84,6 +84,7 @@
 {
   { "binary", no_argument, 0, 'b' },
   { "check", no_argument, 0, 'c' },
+  { "ignore-missing", no_argument, 0, 'm' },
   { "status", no_argument, 0, 2 },
   { "string", required_argument, 0, 1 },
   { "text", no_argument, 0, 't' },
@@ -104,14 +105,17 @@
       printf (_("\
 Usage: %s [OPTION] [FILE]...\n\
   or:  %s [OPTION] --check [FILE]\n\
+  or:  %s [OPTION] --string STRING\n\
 Print or check MD5 checksums.\n\
 With no FILE, or when FILE is -, read standard input.\n\
 \n\
   -b, --binary            read files in binary mode (default on DOS/Windows)\n\
   -c, --check             check MD5 sums against given list\n\
+      --string            read data from command line, not files\n\
   -t, --text              read files in text mode (default)\n\
 \n\
-The following two options are useful only when verifying checksums:\n\
+The following three options are useful only when verifying checksums:\n\
+  -m, --ignore-missing    don't complain about missing or unreadable files\n\
       --status            don't output anything, status code shows success\n\
   -w, --warn              warn about improperly formated MD5 checksum lines\n\
 \n\
@@ -122,7 +126,7 @@
 should be a former output of this program.  The default mode is to print\n\
 a line with checksum, a character indicating type (`*' for binary, ` ' for\n\
 text), and name for each FILE.\n"),
-	      program_name, program_name);
+	      program_name, program_name, program_name);
       puts (_("\nReport bugs to <bug-textutils@gnu.org>."));
     }
 
@@ -236,7 +240,7 @@
    to indicate success.  */
 
 static int
-md5_file (const char *filename, int binary, unsigned char *md5_result)
+md5_file (const char *filename, int binary, unsigned char *md5_result, int ignore_missing)
 {
   FILE *fp;
   int err;
@@ -261,7 +265,8 @@
       fp = fopen (filename, OPENOPTS (binary));
       if (fp == NULL)
 	{
-	  error (0, errno, "%s", filename);
+	  if(!ignore_missing)
+	    error (0, errno, "%s", filename);
 	  return 1;
 	}
     }
@@ -285,7 +290,7 @@
 }
 
 static int
-md5_check (const char *checkfile_name)
+md5_check (const char *checkfile_name, int ignore_missing)
 {
   FILE *checkfile_stream;
   int n_properly_formated_lines = 0;
@@ -357,12 +362,12 @@
 
 	  ++n_properly_formated_lines;
 
-	  fail = md5_file (filename, binary, md5buffer);
+	  fail = md5_file (filename, binary, md5buffer, ignore_missing);
 
 	  if (fail)
 	    {
 	      ++n_open_or_read_failures;
-	      if (!status_only)
+	      if (!(status_only || ignore_missing))
 		{
 		  printf (_("%s: FAILED open or read\n"), filename);
 		  fflush (stdout);
@@ -422,7 +427,7 @@
 	  int n_computed_checkums = (n_properly_formated_lines
 				     - n_open_or_read_failures);
 
-	  if (n_open_or_read_failures > 0)
+	  if (n_open_or_read_failures > 0 && !ignore_missing)
 	    {
 	      error (0, 0,
 		   _("WARNING: %d of %d listed %s could not be read\n"),
@@ -443,7 +448,7 @@
     }
 
   return ((n_properly_formated_lines > 0 && n_mismatched_checksums == 0
-	   && n_open_or_read_failures == 0) ? 0 : 1);
+	   && (n_open_or_read_failures == 0 || ignore_missing)) ? 0 : 1);
 }
 
 int
@@ -451,6 +456,7 @@
 {
   unsigned char md5buffer[16];
   int do_check = 0;
+  int ignore_missing = 0;
   int opt;
   char **string = NULL;
   size_t n_strings = 0;
@@ -472,7 +478,7 @@
   bindtextdomain (PACKAGE, LOCALEDIR);
   textdomain (PACKAGE);
 
-  while ((opt = getopt_long (argc, argv, "bctw", long_options, NULL)) != -1)
+  while ((opt = getopt_long (argc, argv, "bcmtw", long_options, NULL)) != -1)
     switch (opt)
       {
       case 0:			/* long option */
@@ -496,8 +502,13 @@
 	break;
       case 2:
 	status_only = 1;
+	ignore_missing = 0;
 	warn = 0;
 	break;
+      case 'm':
+	status_only = 0;
+	ignore_missing = 1;
+	break;
       case 't':
 	file_type_specified = 1;
 	binary = 0;
@@ -533,6 +544,13 @@
       usage (EXIT_FAILURE);
     }
 
+  if (ignore_missing && !do_check)
+    {
+      error (0, 0,
+       _("the --ignore-missing option is meaningful only when verifying checksums"));
+      usage (EXIT_FAILURE);
+    }
+
   if (warn && !do_check)
     {
       error (0, 0,
@@ -569,7 +587,7 @@
 	  usage (EXIT_FAILURE);
 	}
 
-      err = md5_check ((optind == argc) ? "-" : argv[optind]);
+      err = md5_check ((optind == argc) ? "-" : argv[optind], ignore_missing);
     }
   else
     {
@@ -581,7 +599,7 @@
 	  int fail;
 	  char *file = argv[optind];
 
-	  fail = md5_file (file, binary, md5buffer);
+	  fail = md5_file (file, binary, md5buffer, 0);
 	  err |= fail;
 	  if (!fail)
 	    {