/* Child process for syn-read test. Reads the contents of a test file a byte at a time, in the hope that this will take long enough that we can get a significant amount of contention in the kernel file system code. */ #include #include #include #include #include "tests/lib.h" #include "tests/filesys/base/syn-read.h" const char *test_name = "child-syn-read"; static char buf[BUF_SIZE]; int main (int argc, const char *argv[]) { int child_idx; int fd; size_t i; quiet = true; CHECK (argc == 2, "argc must be 2, actually %d", argc); child_idx = atoi (argv[1]); random_init (0); random_bytes (buf, sizeof buf); CHECK ((fd = open (file_name)) > 1, "open \"%s\"", file_name); for (i = 0; i < sizeof buf; i++) { char c; CHECK (read (fd, &c, 1) > 0, "read \"%s\"", file_name); compare_bytes (&c, buf + i, 1, i, file_name); } close (fd); return child_idx; }