did the TODO of making builtins use a hashtable.

added two commands for dealing with them.
if you want you can override builtins for security reasons? :)
added a small program for doing tail -f for systems that may not have tail -f

1 files changed, 27 insertions, 0 deletions

diff --git a/tailf.c b/tailf.c
new file mode 100644
index 0000000..389e6a0
--- /dev/null
+++ b/tailf.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+
+int main(int argc,char *argv[]) {
+ short in;
+ FILE *fp;
+ if(argc>1) {
+  if(!(fp=fopen(argv[1],"r"))) {
+   printf("file not found.\n");
+   return 1;
+  }
+  while(1) {
+   if((in=fgetc(fp)) == -1) {
+    if(feof(fp)) {
+     clearerr(fp);
+    } else {
+     printf("unknown error from fgetc()");
+     return 2;
+    }
+   } else {
+    printf("%c",in);
+    fflush(stdout);
+   }
+  }
+ } else {
+  printf("usage: tailf filename\n");
+ }
+}