-static const int max_file_size = 1024 * 1024;
-
-static int read_file(struct discover_context *ctx,
- const char *filename, char **bufp, int *lenp)
-{
- struct stat statbuf;
- int rc, fd, i, len;
- char *buf;
-
- fd = open(filename, O_RDONLY);
- if (fd < 0)
- return -1;
-
- rc = fstat(fd, &statbuf);
- if (rc < 0)
- goto err_close;
-
- len = statbuf.st_size;
- if (len > max_file_size)
- goto err_close;
-
- buf = talloc_array(ctx, char, len + 1);
- if (!buf)
- goto err_close;
-
- for (i = 0; i < len; i += rc) {
- rc = read(fd, buf + i, len - i);
-
- /* unexpected EOF: trim and return */
- if (rc == 0) {
- len = i;
- break;
- }
-
- if (rc < 0)
- goto err_free;
-
- }
-
- buf[len] = '\0';
-
- close(fd);
- *bufp = buf;
- *lenp = len;
- return 0;
-
-err_free:
- talloc_free(buf);
-err_close:
- close(fd);
- return -1;
-}