Libc-1353.60.8.tar.gz

[apple/libc.git] / libdarwin / stdio.c

diff --git a/libdarwin/stdio.c b/libdarwin/stdio.c
index c1d1585e73521e5e04af1c1d4ffce973203a0eb8..d7c44078f4fa3f68c6dec7f95c46ba8f6a236b48 100644 (file)
--- a/libdarwin/stdio.c
+++ b/libdarwin/stdio.c
@@ -66,6 +66,63 @@ dup_np(os_fd_t fd)
        return dfd;
 }
 
+os_fd_t
+claimfd_np(os_fd_t *fdp, const guardid_t *gdid, u_int gdflags)
+{
+       int ret = -1;
+       int fd = *fdp;
+
+       if (gdid) {
+               ret = change_fdguard_np(fd, NULL, 0, gdid, gdflags, NULL);
+               if (ret) {
+                       os_crash("change_fdguard_np: %{darwin.errno}d", errno);
+               }
+       }
+
+       *fdp = -1;
+       return fd;
+}
+
+os_fd_t
+xferfd_np(os_fd_t *fdp, const guardid_t *gdid, u_int gdflags)
+{
+       int ret = -1;
+       int fd = *fdp;
+
+       ret = change_fdguard_np(fd, gdid, gdflags, NULL, 0, NULL);
+       if (ret) {
+               os_crash("change_fdguard_np: %{darwin.errno}d", errno);
+       }
+
+       *fdp = -1;
+       return fd;
+}
+
+void
+close_drop_np(os_fd_t *fdp, const guardid_t *gdid)
+{
+       int ret = -1;
+       int fd = *fdp;
+
+       if (gdid) {
+               ret = guarded_close_np(fd, gdid);
+       } else {
+               ret = close(fd);
+       }
+
+       posix_assert_zero(ret);
+       *fdp = -1;
+}
+
+void
+close_drop_optional_np(os_fd_t *fdp, const guardid_t *gdid)
+{
+       if (!os_fd_valid(*fdp)) {
+               return;
+       }
+       close_drop_np(fdp, gdid);
+}
+
 size_t
 zsnprintf_np(char *buff, size_t len, const char *fmt, ...)
 {