toybox-0.6.0-add-setns-for-uclibc.patch

toybox-0.6.0-add-setns-for-uclibc.patch (text/plain), 897 bytes, created by Andrew Miller on 2015-08-10 04:32:30 UTC

Upstream uses a patched version of uClibc,[1] Gentoo does not,
so we need to add the setns() system call.

Patch by Andrew Miller, fixes bug #557070.

[1] http://landley.net/hg/aboriginal/file/3ffb288cc713/sources/patches/uClibc-setns.patch

--- lib/portability.h
+++ lib/portability.h
@@ -90,10 +90,23 @@
 char *stpcpy(char *dest, const char *src);
 pid_t getsid(pid_t pid);
 
+#ifndef HAVE_SETNS
+#include <sys/syscall.h>
+static inline int setns(int fd, int nstype)
+{
+#ifdef __NR_setns
+  return syscall(__NR_setns, fd, nstype);
+#elif defined(__NR_set_ns)
+  return syscall(__NR_set_ns, fd, nstype);
+#else
+  return -1;
+#endif
+}
+#endif
+
 // uClibc's last-ever release was in 2012, so of course it doesn't define
 // any flag newer than MS_MOVE, which was added in 2001 (linux 2.5.0.5),
 // eleven years earlier.
-
 #include <sys/mount.h>
 #ifndef MS_MOVE
 #define MS_MOVE       (1<<13)