* Licensed under GPLv2 or later, see file License in this tarball for details.
*/
-#include "busybox.h"
+#include "libbb.h"
+int readahead_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int readahead_main(int argc, char **argv)
{
- FILE *f;
- struct stat stat_buf;
int retval = EXIT_SUCCESS;
if (argc == 1) bb_show_usage();
while (*++argv) {
- if ((f = bb_wfopen(*argv, "r")) != NULL) {
- int r, fd=fileno(f);
-
- xstat(*argv, &stat_buf);
- r = readahead(fd, 0, fdlength(fd));
- fclose(f);
- if (r >= 0) continue;
+ int fd = open_or_warn(*argv, O_RDONLY);
+ if (fd >= 0) {
+ off_t len;
+ int r;
+
+ /* fdlength was reported to be unreliable - use seek */
+ len = xlseek(fd, 0, SEEK_END);
+ xlseek(fd, 0, SEEK_SET);
+ r = readahead(fd, 0, len);
+ close(fd);
+ if (r >= 0)
+ continue;
}
retval = EXIT_FAILURE;
}