oslib-posix: Use sysctl(2) call to resolve exec_dir on NetBSD

NetBSD 8.0(beta) ships with KERN_PROC_PATHNAME in sysctl(2). Older NetBSD versions can use argv[0] parsing fallback. This code section is partly shared with FreeBSD. Signed-off-by: Kamil Rytarowski <[email protected]> Message-id: [email protected] Reviewed-by: Peter Maydell <[email protected]> Signed-off-by: Peter Maydell <[email protected]>
0x3h · Nov 2, 2017 · 094611b · 094611b
1 parent fa73e14
commit 094611b
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
@@ -49,6 +49,10 @@
 #include <libutil.h>
 #endif
 
+#ifdef __NetBSD__
+#include <sys/sysctl.h>
+#endif
+
 #include "qemu/mmap-alloc.h"
 
 #ifdef CONFIG_DEBUG_STACK_USAGE
@@ -250,9 +254,14 @@ void qemu_init_exec_dir(const char *argv0)
             p = buf;
         }
     }
-#elif defined(__FreeBSD__)
+#elif defined(__FreeBSD__) \
+      || (defined(__NetBSD__) && defined(KERN_PROC_PATHNAME))
     {
+#if defined(__FreeBSD__)
         static int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
+#else
+        static int mib[4] = {CTL_KERN, KERN_PROC_ARGS, -1, KERN_PROC_PATHNAME};
+#endif
         size_t len = sizeof(buf) - 1;
 
         *buf = '\0';