1 files changed, 30 insertions, 0 deletions
diff --git a/m4/mntctl.m4 b/m4/mntctl.m4
new file mode 100644
index 0000000..9d0dde1
--- /dev/null
+++ b/m4/mntctl.m4
@@ -0,0 +1,30 @@
+dnl **
+dnl ** AIX mntctl
+dnl **
+
+AC_DEFUN([DOVECOT_MNTCTL], [
+  if test $ac_cv_header_sys_vmount_h = yes; then
+    AC_MSG_CHECKING([for reasonable mntctl buffer size])
+    AC_RUN_IFELSE([AC_LANG_SOURCE([[
+      #include <stdio.h>
+      #include <stdlib.h>
+      #include <sys/vmount.h>
+      int main() {
+        int size,count; char *m;
+        FILE *f=fopen("conftestval", "w");
+        if (!f) exit(1);
+        if ((count=mntctl(MCTL_QUERY,sizeof(size),&size))!=0 || !(m=malloc(size)) ||
+            (count=mntctl(MCTL_QUERY,size,m))<=0) exit(1);
+          fprintf(f, "%d\n",(size * (count + 5))/count & ~1); /* 5 mounts more */
+          exit(0);
+      }
+    ]])],[
+      size=`cat conftestval`
+      rm -f conftestval
+      AC_DEFINE_UNQUOTED(STATIC_MTAB_SIZE,$size, [reasonable mntctl buffer size])
+      AC_MSG_RESULT($size)
+    ],[
+      AC_MSG_RESULT(default)
+    ])
+  fi
+])