| Backport of unshare() syscall. |
| From uClibc git 19dd090a0f68765db87990ef8eda9bf77bb29581 |
| |
| Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar> |
| |
| --- |
| diff -Nura uClibc-0.9.31.1.orig/libc/sysdeps/linux/common/bits/sched.h uClibc-0.9.31.1/libc/sysdeps/linux/common/bits/sched.h |
| --- uClibc-0.9.31.1.orig/libc/sysdeps/linux/common/bits/sched.h 2011-06-08 15:58:40.000000000 -0300 |
| +++ uClibc-0.9.31.1/libc/sysdeps/linux/common/bits/sched.h 2011-12-05 08:10:02.491978849 -0300 |
| @@ -58,7 +58,13 @@ |
| force CLONE_PTRACE on this clone. */ |
| # define CLONE_CHILD_SETTID 0x01000000 /* Store TID in userlevel buffer in |
| the child. */ |
| -# define CLONE_STOPPED 0x02000000 /* Start in stopped state. */ |
| +# define CLONE_STOPPED 0x02000000 /* Start in stopped state. */ |
| +# define CLONE_NEWUTS 0x04000000 /* New utsname group. */ |
| +# define CLONE_NEWIPC 0x08000000 /* New ipcs. */ |
| +# define CLONE_NEWUSER 0x10000000 /* New user namespace. */ |
| +# define CLONE_NEWPID 0x20000000 /* New pid namespace. */ |
| +# define CLONE_NEWNET 0x40000000 /* New network namespace. */ |
| +# define CLONE_IO 0x80000000 /* Clone I/O context. */ |
| #endif |
| |
| /* The official definition. */ |
| @@ -74,11 +80,9 @@ |
| extern int clone (int (*__fn) (void *__arg), void *__child_stack, |
| int __flags, void *__arg, ...) __THROW; |
| |
| -#if 0 |
| /* Unshare the specified resources. */ |
| extern int unshare (int __flags) __THROW; |
| #endif |
| -#endif |
| |
| __END_DECLS |
| |
| diff -Nura uClibc-0.9.31.1.orig/libc/sysdeps/linux/common/Makefile.in uClibc-0.9.31.1/libc/sysdeps/linux/common/Makefile.in |
| --- uClibc-0.9.31.1.orig/libc/sysdeps/linux/common/Makefile.in 2011-06-08 15:58:40.000000000 -0300 |
| +++ uClibc-0.9.31.1/libc/sysdeps/linux/common/Makefile.in 2011-12-05 08:23:28.353757602 -0300 |
| @@ -31,7 +31,8 @@ |
| remap_file_pages.c sched_getaffinity.c sched_setaffinity.c \ |
| sendfile64.c sendfile.c setfsgid.c setfsuid.c setresuid.c \ |
| splice.c vmsplice.c tee.c signalfd.c swapoff.c swapon.c \ |
| - sync_file_range.c sysctl.c sysinfo.c timerfd.c uselib.c vhangup.c,$(CSRC)) |
| + sync_file_range.c sysctl.c sysinfo.c timerfd.c unshare.c uselib.c \ |
| + vhangup.c,$(CSRC)) |
| endif |
| |
| ifneq ($(UCLIBC_BSD_SPECIFIC),y) |
| diff -Nura uClibc-0.9.31.1.orig/libc/sysdeps/linux/common/unshare.c uClibc-0.9.31.1/libc/sysdeps/linux/common/unshare.c |
| --- uClibc-0.9.31.1.orig/libc/sysdeps/linux/common/unshare.c 1969-12-31 21:00:00.000000000 -0300 |
| +++ uClibc-0.9.31.1/libc/sysdeps/linux/common/unshare.c 2011-12-05 08:22:45.954453512 -0300 |
| @@ -0,0 +1,21 @@ |
| +/* vi: set sw=4 ts=4: */ |
| +/* |
| + * unshare() for uClibc |
| + * |
| + * Copyright (C) 2011 Henning Heinold <heinold@inf.fu-berlin.de> |
| + * |
| + * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| + */ |
| + |
| +#include <sys/syscall.h> |
| +#include <sched.h> |
| + |
| +#if defined __NR_unshare && defined __UCLIBC_LINUX_SPECIFIC__ |
| +_syscall1(int, unshare, int, flags) |
| +#else |
| +int unshare(int flags) |
| +{ |
| + __set_errno(ENOSYS); |
| + return -1; |
| +} |
| +#endif |
