diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
-rw-r--r-- | winsup/cygwin/syscalls.cc | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index 486db1db6..9d88b60b0 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -85,6 +85,48 @@ close_all_files (bool norelease) cygheap->fdtab.unlock (); } +/* Close or set the close-on-exec flag for all open file descriptors + from firstfd to lastfd. CLOSE_RANGE_UNSHARE is not supported. + Available on FreeBSD since 13 and Linux since 5.9 */ +extern "C" int +close_range (unsigned int firstfd, unsigned int lastfd, int flags) +{ + pthread_testcancel (); + + if (!(firstfd <= lastfd && !(flags & ~CLOSE_RANGE_CLOEXEC))) + { + set_errno (EINVAL); + return -1; + } + + cygheap->fdtab.lock (); + + unsigned int size = (lastfd < cygheap->fdtab.size ? lastfd + 1 : + cygheap->fdtab.size); + + for (unsigned int i = firstfd; i < size; i++) + { + cygheap_fdget cfd ((int) i, false, false); + if (cfd < 0) + continue; + + if (flags & CLOSE_RANGE_CLOEXEC) + { + syscall_printf ("set FD_CLOEXEC on fd %u", i); + cfd->fcntl (F_SETFD, FD_CLOEXEC); + } + else + { + syscall_printf ("closing fd %u", i); + cfd->close_with_arch (); + cfd.release (); + } + } + + cygheap->fdtab.unlock (); + return 0; +} + extern "C" int dup (int fd) { |