From 390f547ea80d6758099a867669e6429d511d9c88 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@bsdimp.com>
Date: Sun, 12 Jun 2022 08:13:34 -0600
Subject: [PATCH] bsd-user: Implement chdir and fchdir

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 bsd-user/bsd-file.h           | 19 +++++++++++++++++++
 bsd-user/freebsd/os-syscall.c |  8 ++++++++
 2 files changed, 27 insertions(+)

diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
index 6ff2be24e3..bc0a0c08d5 100644
--- a/bsd-user/bsd-file.h
+++ b/bsd-user/bsd-file.h
@@ -311,4 +311,23 @@ static abi_long do_bsd_faccessat(abi_long arg1, abi_long arg2,
     return ret;
 }
 
+/* chdir(2) */
+static abi_long do_bsd_chdir(abi_long arg1)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(chdir(p)); /* XXX  path(p)? */
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* fchdir(2) */
+static abi_long do_bsd_fchdir(abi_long arg1)
+{
+    return get_errno(fchdir(arg1));
+}
+
 #endif /* BSD_FILE_H */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index 7b7af914e4..8698db358c 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -301,6 +301,14 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_faccessat(arg1, arg2, arg3, arg4);
         break;
 
+    case TARGET_FREEBSD_NR_chdir: /* chdir(2) */
+        ret = do_bsd_chdir(arg1);
+        break;
+
+    case TARGET_FREEBSD_NR_fchdir: /* fchdir(2) */
+        ret = do_bsd_fchdir(arg1);
+        break;
+
     default:
         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
         ret = -TARGET_ENOSYS;