From 65c6c4c893a29cf5c2eef48ab92ef4f04f31576f Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@bsdimp.com>
Date: Sun, 12 Jun 2022 08:11:30 -0600
Subject: [PATCH] bsd-user: Implement revoke, access, eaccess and faccessat

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           | 53 +++++++++++++++++++++++++++++++++++
 bsd-user/freebsd/os-syscall.c | 16 +++++++++++
 2 files changed, 69 insertions(+)

diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h
index 94eb03df62..6ff2be24e3 100644
--- a/bsd-user/bsd-file.h
+++ b/bsd-user/bsd-file.h
@@ -258,4 +258,57 @@ static abi_long do_bsd_closefrom(abi_long arg1)
     return get_errno(0);
 }
 
+/* revoke(2) */
+static abi_long do_bsd_revoke(abi_long arg1)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(revoke(p)); /* XXX path(p)? */
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* access(2) */
+static abi_long do_bsd_access(abi_long arg1, abi_long arg2)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(access(path(p), arg2));
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* eaccess(2) */
+static abi_long do_bsd_eaccess(abi_long arg1, abi_long arg2)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(eaccess(path(p), arg2));
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* faccessat(2) */
+static abi_long do_bsd_faccessat(abi_long arg1, abi_long arg2,
+        abi_long arg3, abi_long arg4)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg2);
+    ret = get_errno(faccessat(arg1, p, arg3, arg4)); /* XXX path(p)? */
+    UNLOCK_PATH(p, arg2);
+
+    return ret;
+}
+
 #endif /* BSD_FILE_H */
diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c
index f7d0990992..7b7af914e4 100644
--- a/bsd-user/freebsd/os-syscall.c
+++ b/bsd-user/freebsd/os-syscall.c
@@ -285,6 +285,22 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_closefrom(arg1);
         break;
 
+    case TARGET_FREEBSD_NR_revoke: /* revoke(2) */
+        ret = do_bsd_revoke(arg1);
+        break;
+
+    case TARGET_FREEBSD_NR_access: /* access(2) */
+        ret = do_bsd_access(arg1, arg2);
+        break;
+
+    case TARGET_FREEBSD_NR_eaccess: /* eaccess(2) */
+        ret = do_bsd_eaccess(arg1, arg2);
+        break;
+
+    case TARGET_FREEBSD_NR_faccessat: /* faccessat(2) */
+        ret = do_bsd_faccessat(arg1, arg2, arg3, arg4);
+        break;
+
     default:
         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
         ret = -TARGET_ENOSYS;