diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index 9d88b60..600c6c5 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -1609,10 +1609,33 @@ lseek (int fd, off_t pos, int dir) else { cygheap_fdget cfd (fd); - if (cfd >= 0) - res = cfd->lseek (pos, dir); - else + if (cfd < 0) res = -1; + else if (cfd->getdents_dir ()) + { + if (dir != SEEK_SET && dir != SEEK_CUR) /* No SEEK_END */ + { + set_errno (EINVAL); + res = -1; + } + else + { + long cur; + + cur = cfd->telldir (cfd->getdents_dir ()); + if (dir == SEEK_CUR && cur == 0) + res = cur; + else + { + if (dir == SEEK_CUR) + pos = cur + pos; + cfd->seekdir (cfd->getdents_dir (), pos); + res = pos; + } + } + } + else + res = cfd->lseek (pos, dir); } /* Can't use %R/%lR here since res is always 8 bytes */ syscall_printf (res == -1 ? "%D = lseek(%d, %D, %d), errno %d" |