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authorLudovic Courtès <ludo@gnu.org>2018-07-03 10:52:55 +0200
committerLudovic Courtès <ludo@gnu.org>2018-07-03 17:50:04 +0200
commit25c7ff6a3ecbaa1e93b38d35c8cbff40b7f4edb8 (patch)
tree77aee44c3d14d98dfac93f504e6041f6dfbf5c83
parenta5b34d9d24cababcaa9d5e93813ccb3196e11a95 (diff)
downloadpatches-25c7ff6a3ecbaa1e93b38d35c8cbff40b7f4edb8.tar
patches-25c7ff6a3ecbaa1e93b38d35c8cbff40b7f4edb8.tar.gz
syscalls: Define AT_SYMLINK_NOFOLLOW et al.
* guix/build/syscalls.scm (AT_FDCWD, AT_SYMLINK_NOFOLLOW, AT_REMOVEDIR) (AT_SYMLINK_FOLLOW, AT_NO_AUTOMOUNT, AT_EMPTY_PATH): New variables. * tests/syscalls.scm ("utime with AT_SYMLINK_NOFOLLOW"): New test.
-rw-r--r--guix/build/syscalls.scm17
-rw-r--r--tests/syscalls.scm13
2 files changed, 30 insertions, 0 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm
index 25726b885e..74cb675fcf 100644
--- a/guix/build/syscalls.scm
+++ b/guix/build/syscalls.scm
@@ -46,6 +46,14 @@
MNT_DETACH
MNT_EXPIRE
UMOUNT_NOFOLLOW
+
+ AT_FDCWD
+ AT_SYMLINK_NOFOLLOW
+ AT_REMOVEDIR
+ AT_SYMLINK_FOLLOW
+ AT_NO_AUTOMOUNT
+ AT_EMPTY_PATH
+
restart-on-EINTR
mount-points
swapon
@@ -667,6 +675,15 @@ mounted at FILE."
(* (file-system-block-size fs)
(file-system-blocks-available fs))))
+;; Flags for the *at command, notably the 'utime' procedure of libguile.
+;; From <fcntl.h>.
+(define AT_FDCWD -100)
+(define AT_SYMLINK_NOFOLLOW #x100)
+(define AT_REMOVEDIR #x200)
+(define AT_SYMLINK_FOLLOW #x400)
+(define AT_NO_AUTOMOUNT #x800)
+(define AT_EMPTY_PATH #x1000)
+
;;;
;;; Containers.
diff --git a/tests/syscalls.scm b/tests/syscalls.scm
index 0d07280b99..3e267c9f01 100644
--- a/tests/syscalls.scm
+++ b/tests/syscalls.scm
@@ -60,6 +60,19 @@
(any (cute member <> (mount-points))
'("/" "/proc" "/sys" "/dev")))
+(false-if-exception (delete-file temp-file))
+(test-equal "utime with AT_SYMLINK_NOFOLLOW"
+ '(0 0)
+ (begin
+ ;; Test libguile's utime with AT_SYMLINK_NOFOLLOW, which libguile does not
+ ;; define as of Guile 2.2.4.
+ (symlink "/nowhere" temp-file)
+ (utime temp-file 0 0 0 0 AT_SYMLINK_NOFOLLOW)
+ (let ((st (lstat temp-file)))
+ (delete-file temp-file)
+ ;; Note: 'utimensat' does not change 'ctime'.
+ (list (stat:mtime st) (stat:atime st)))))
+
(test-assert "swapon, ENOENT/EPERM"
(catch 'system-error
(lambda ()