diff options
Diffstat (limited to 'random.c')
-rw-r--r-- | random.c | 18 |
1 files changed, 15 insertions, 3 deletions
@@ -175,17 +175,29 @@ random_seed() unsigned long result; int fd; unsigned long buf; + struct stat statbuf; gettimeofday(&tv, 0); result = tv.tv_sec ^ tv.tv_usec ^ getpid() ^ n++; result += (unsigned long)&result; - if ((fd = open("/dev/urandom", O_RDONLY)) >= 0) { - read(fd, &buf, sizeof(buf)); +#ifdef S_ISCHR + if ((fd = open("/dev/urandom", O_RDONLY|O_NONBLOCK +#ifdef O_NOCTTY + |O_NOCTTY +#endif +#ifdef O_NOFOLLOW + |O_NOFOLLOW +#endif + )) >= 0) { + if (fstat(fd, &statbuf) == 0 && S_ISCHR(statbuf.st_mode)) { + read(fd, &buf, sizeof(buf)); + result ^= buf; + } close(fd); - result ^= buf; } +#endif return result; } |