[libc] Setup hdrgen for ioctl

[boomanaiden154]

This patch adds some hdrgen yaml for ioctl(). Otherwise the function never actually ends up being available in a full build. This is the last thing that is needed to enable turning on LIBCXX_ENABLE_RANDOM_DEVICE.

[llvmbot]

@llvm/pr-subscribers-libc

Author: Aiden Grossman (boomanaiden154)

Changes

This patch adds some hdrgen yaml for ioctl(). Otherwise the function never actually ends up being available in a full build. This is the last thing that is needed to enable turning on LIBCXX_ENABLE_RANDOM_DEVICE.

---

Full diff: https://github.com/llvm/llvm-project/pull/153976.diff

1 Files Affected:

• (modified) libc/include/sys/ioctl.yaml (+7-1)

diff --git a/libc/include/sys/ioctl.yaml b/libc/include/sys/ioctl.yaml
index 5f7b7f333191e..f323cc9b431b4 100644
--- a/libc/include/sys/ioctl.yaml
+++ b/libc/include/sys/ioctl.yaml
@@ -5,4 +5,10 @@ macros: []
 types: []
 enums: []
 objects: []
-functions: []
+functions:
+  - name: ioctl
+    return_type: int
+    arguments:
+      - type: int
+      - type: unsigned long
+      - type: '...'

[frobtech]

lgtm, but we'll have to fix the standards list both to be correct and to make hdrgen work since it demands precise spellings now.

[frobtech]

We should fix the "standards" list here while we're making this header usable. POSIX definitely does not specify ioctl or <sys/ioctl.h>. Both bsd and linux are reasonable things to list here.

[boomanaiden154]

Added Linux.

I didn't add anything originally given https://man7.org/linux/man-pages/man2/ioctl.2.html doesn't mention any standards, but it is a Linux syscall.