diff options
| -rw-r--r-- | coreutils/tail.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c index e3f89d2ee..d49539916 100644 --- a/coreutils/tail.c +++ b/coreutils/tail.c @@ -79,7 +79,19 @@ static void tail_xbb_full_write(const char *buf, size_t len) static ssize_t tail_read(int fd, char *buf, size_t count) { ssize_t r; + off_t current,end; + struct stat sbuf; + int ret; + end = current = lseek (fd, 0, SEEK_CUR); + if (!fstat(fd, &sbuf)){ + end = sbuf.st_size; + } + if ( end < current) { + lseek(fd, 0, SEEK_SET); + } else { + lseek(fd, current, SEEK_SET); + } if ((r = safe_read(fd, buf, count)) < 0) { bb_perror_msg("read"); status = EXIT_FAILURE; |