6 typedef struct _Buffer {
11 void InitBuffer (Buffer *b);
12 void AppendToBuffer (Buffer *b, const char *str, int len);
13 void ReadFile (Buffer *buffer, FILE *input);
15 #define INIT_BUFFER_SIZE 10000
20 b->room = INIT_BUFFER_SIZE;
22 b->buff = (char *)malloc(INIT_BUFFER_SIZE*sizeof(char));
25 void AppendToBuffer(b, str, len)
30 while (b->used + len > b->room) {
31 b->buff = (char *)realloc(b->buff, 2*b->room*(sizeof(char)));
34 strncpy(b->buff + b->used, str, len);
38 void ReadFile(buffer, input)
46 while (!feof(input) && (bytes = fread(buf, 1, BUFSIZ, input)) > 0) {
47 AppendToBuffer(buffer, buf, bytes);
49 AppendToBuffer(buffer, "", 1);
53 main(int argc, char *argv[])
55 char filename[] = "xbug.c";
61 if (!freopen (filename, "r", stdin))
62 fprintf(stderr, "cannot open file\n");
64 unsetenv ("LD_LIBRARY_PATH");
66 if (!(input = popen("/bin/cat", "r")))
67 fprintf(stderr, "cannot run \n");
69 ReadFile(&buffer, input);