diff options
Diffstat (limited to 'config/kernel-kuidgid.m4')
| -rw-r--r-- | config/kernel-kuidgid.m4 | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/config/kernel-kuidgid.m4 b/config/kernel-kuidgid.m4 new file mode 100644 index 000000000..47d193783 --- /dev/null +++ b/config/kernel-kuidgid.m4 @@ -0,0 +1,28 @@ +dnl # +dnl # User namespaces, use kuid_t in place of uid_t +dnl # where available. Not strictly a user namespaces thing +dnl # but it should prevent surprises +dnl # +AC_DEFUN([SPL_AC_KUIDGID_T], [ + AC_MSG_CHECKING([whether kuid_t/kgid_t is available]) + SPL_LINUX_TRY_COMPILE([ + #include <linux/uidgid.h> + ], [ + kuid_t userid = KUIDT_INIT(0); + kgid_t groupid = KGIDT_INIT(0); + ],[ + SPL_LINUX_TRY_COMPILE([ + #include <linux/uidgid.h> + ], [ + kuid_t userid = 0; + kgid_t groupid = 0; + ],[ + AC_MSG_RESULT(yes; optional) + ],[ + AC_MSG_RESULT(yes; mandatory) + AC_DEFINE(HAVE_KUIDGID_T, 1, [kuid_t/kgid_t in use]) + ]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |