Initial commit of code released on 2002-07-15

Sources/cksum.c

@@ -0,0 +1,100 @@
+/* $Id: cksum.c,v 1.1 1997/06/30 03:48:05 cvs Exp $
+ */
+
+/* Undernet Channel Service (X)
+ * Copyright (C) 1995-2002 Robin Thellend
+ *
+ * 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 of the License, 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
+ *
+ * The author can be contact by email at <csfeedback@robin.pfft.net>
+ *
+ * Please note that this software is unsupported and mostly
+ * obsolete. It was replaced by GNUworld/CMaster. See
+ * http://gnuworld.sourceforge.net/ for more information.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+void cksum(char *file, unsigned int *sum1, unsigned int *sum2)
+{
+  int fd=-1, size;
+  unsigned char buffer[1024];
+
+  if(strchr(file,'/') != NULL)
+  {
+    fd = open(file,O_RDONLY);
+  }
+  else  /* check path */
+  {
+    char *tok,*path = getenv("PATH");
+    if(path == NULL)
+      return;
+    for(tok=strtok(path,":"); tok!=NULL; tok=strtok(NULL,":"))/* mangles PATH*/
+    {
+      strncpy(buffer,tok,1023);
+      strncat(buffer,"/",1023);
+      strncat(buffer,file,1023);
+      buffer[1023] = '\0';
+      fd = open(buffer,O_RDONLY);
+      if(fd >= 0)
+        break;
+    }
+  }
+    
+  if(fd<0)
+  {
+    return;
+  }
+
+  *sum1 = *sum2 = 0;
+
+  while((size=read(fd,buffer,1023))>0)
+  {
+    while(size--)
+    {
+      *sum1 += buffer[size];
+      *sum2 += (size&1)?-buffer[size]:buffer[size];
+    }
+  }
+
+  close(fd);
+}
+
+
+#ifdef MAIN
+int main(int argc, char **argv)
+{
+  unsigned int sum,pro;
+
+  if(argc != 2)
+  {
+    fprintf(stderr,"usage: %s file\n",argv[0]);
+    exit(1);
+  }
+
+  cksum(argv[1],&sum,&pro);
+  printf("-DBINCKSUM1=0x%x -DBINCKSUM2=0x%x\n",sum,pro);
+  exit(0);
+}
+#endif
+