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

@@ -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 */

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;