1 files changed, 42 insertions, 0 deletions
diff --git a/subs/subs.c b/subs/subs.c
new file mode 100644
index 0000000..03f05c5
--- /dev/null
+++ b/subs/subs.c
@@ -0,0 +1,42 @@
+#include <strings.h>
+#include <stdio.h>
+#include <unistd.h>
+
+void usage(char *name)
+{
+  fprintf(stderr,"Usage:\n\t%s [-n <character>] [-w <character>] <string>\n",name);
+}
+
+int main(int argc, char *argv[])
+{
+  char *h,n=':',w=' ';
+  int c;
+
+  while((c=getopt(argc, argv, "n:w:"))!=-1)
+    switch(c)
+    {
+      case 'n':
+        n=optarg[0];
+        break;
+      case 'w':
+        w=optarg[0];
+        break;
+      default:
+        usage(argv[0]);
+        return 1;
+    }
+
+  if(optind>=argc)
+  {
+    usage(argv[0]);
+    return 1;
+  }
+
+  h=argv[optind];
+  while( (h=index(h, n)) !=NULL )
+    *h++=w;
+  
+  printf("%s",argv[optind]);
+
+  return 0;
+}