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- 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
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