1 files changed, 63 insertions, 0 deletions
diff --git a/stdio/xbug.c b/stdio/xbug.c
new file mode 100644
index 0000000..ec648f5
--- /dev/null
+++ b/stdio/xbug.c
@@ -0,0 +1,63 @@
+#include <stdio.h>
+
+typedef struct _Buffer {
+  char *buff;
+  int  room, used;
+} Buffer;
+
+#define INIT_BUFFER_SIZE 10000
+
+void InitBuffer(b)
+     Buffer *b;
+{
+  b->room = INIT_BUFFER_SIZE;
+  b->used = 0;
+  b->buff = (char *)malloc(INIT_BUFFER_SIZE*sizeof(char));
+}
+
+void AppendToBuffer(b, str, len)
+     register Buffer *b;
+     char *str;
+     register int len;
+{
+  while (b->used + len > b->room) {
+    b->buff = (char *)realloc(b->buff, 2*b->room*(sizeof(char)));
+    b->room *= 2;
+  }
+  strncpy(b->buff + b->used, str, len);
+  b->used += len;
+}
+
+void ReadFile(buffer, input)
+     register Buffer *buffer;
+     FILE *input;
+{
+  char       buf[BUFSIZ + 1];
+  register int        bytes;
+
+  buffer->used = 0;
+  while (!feof(input) && (bytes = fread(buf, 1, BUFSIZ, input)) > 0) {
+    AppendToBuffer(buffer, buf, bytes);
+  }
+  AppendToBuffer(buffer, "", 1);
+}
+
+main() 
+{
+  char * filename = "xbug.c";
+  FILE *input;
+  Buffer buffer;
+  
+  InitBuffer(&buffer);
+    
+  if (!freopen (filename, "r", stdin))
+    fprintf(stderr, "cannot open file\n");
+  
+  if (!(input = popen("/bin/cat", "r")))
+    fprintf(stderr, "cannot run \n");
+  
+  ReadFile(&buffer, input);
+  pclose(input);
+
+  return 0;
+}