davexunit pushed a commit to branch wip-container
in repository guix.
commit 02f7ba82814c72e23f6a4f31b5a6fb067def3a9b
Author: David Thompson <[email protected]>
Date: Mon Jun 8 08:43:05 2015 -0400
build: syscalls: Add setns syscall wrapper.
* guix/build/syscalls.scm (setns): New procedure.
---
guix/build/syscalls.scm | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm
index 3346358..6794d9d 100644
--- a/guix/build/syscalls.scm
+++ b/guix/build/syscalls.scm
@@ -45,6 +45,7 @@
CLONE_NEWPID
CLONE_NEWNET
clone
+ setns
IFF_UP
IFF_BROADCAST
@@ -279,6 +280,20 @@ Unlike the fork system call, clone accepts FLAGS that
specify which resources
are shared between the parent and child processes."
(proc syscall-id flags %null-pointer))))
+(define setns
+ (let* ((ptr (dynamic-func "setns" (dynamic-link)))
+ (proc (pointer->procedure int ptr (list int int))))
+ (lambda (fdes nstype)
+ "Reassociate the current process with the namespace specified by FDES.
+NSTYPE specifies which type of namespace the current process may be
+reassociated with, or 0 if there is no such limitation."
+ (let ((ret (proc fdes nstype))
+ (err (errno)))
+ (unless (zero? ret)
+ (throw 'system-error "setns" "~d ~d: ~A"
+ (list fdes nstype (strerror err))
+ (list err)))))))
+
;;;
;;; Packed structures.
