Implement shm_attach_to_open_removed() for OpenBSD

[fio.git] / os / os-openbsd.h

diff --git a/os/os-openbsd.h b/os/os-openbsd.h
index 9c7092c8ef4908a682323b4065d18445430bc076..670892b44e2bc93dac3de3e4357cbcf0966d6087 100644 (file)
--- a/os/os-openbsd.h
+++ b/os/os-openbsd.h
@@ -9,6 +9,7 @@
 #include <sys/ioctl.h>
 #include <sys/dkio.h>
 #include <sys/disklabel.h>
+#include <sys/utsname.h>
 /* XXX hack to avoid conflicts between rbtree.h and <sys/tree.h> */
 #include <sys/sysctl.h>
 #undef RB_BLACK
@@ -90,9 +91,31 @@ static inline unsigned long long get_fs_free_size(const char *path)
 
 static inline int shm_attach_to_open_removed(void)
 {
+       struct utsname uts;
+       int major, minor;
+
+       if (uname(&uts) == -1)
+               return 0;
+
        /*
-        * XXX: Return 1 if >= OpenBSD 5.1 according to 97900ebf.
+        * Return 1 if >= OpenBSD 5.1 according to 97900ebf,
+        * assuming both major/minor versions are < 10.
         */
+       if (uts.release[0] > '9' || uts.release[0] < '0')
+               return 0;
+       if (uts.release[1] != '.')
+               return 0;
+       if (uts.release[2] > '9' || uts.release[2] < '0')
+               return 0;
+
+       major = uts.release[0] - '0';
+       minor = uts.release[2] - '0';
+
+       if (major > 5)
+               return 1;
+       if (major == 5 && minor >= 1)
+               return 1;
+
        return 0;
 }