add prlimit syscall wrapper, now for real

libc/sysdeps/linux/common/prlimit.c

@@ -0,0 +1,27 @@
+/* Get/set resource limits.  Linux specific syscall.
+   Copyright (C) 2021-2022 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sys/resource.h>
+#include <sysdep.h>
+
+int
+prlimit (__pid_t pid, enum __rlimit_resource resource,
+	     const struct rlimit *new_rlimit, struct rlimit *old_rlimit)
+{
+  return INLINE_SYSCALL (prlimit64, 4, pid, resource, new_rlimit,
+			      old_rlimit);
+}