Remove a duplicate build tag in unix/flock.go. Keep the alphabetically
sorted version below the copyright header.
Change-Id: Ie3a6e5e01e5e4114960fdf63111a68d3b2b8de47
Reviewed-on: https://go-review.googlesource.com/51051
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Add Major, Minor and Mkdev functions for converting devices numbers to
their major/minor components and vice versa.
The functions follow the behavior of glibc's corresponding macros. Also
add an explanatory comment about the device number format, so the magic
numbers make more sense.
Test the conversion macros with some well-known device numbers for
devices which should be present on any Linux system.
Fixesgolang/go#8106
Change-Id: Id336317985d6ac85ee83bc54e5f23703257c9121
Reviewed-on: https://go-review.googlesource.com/50550
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Add the Faccessat, Fchownat, Linkat, Mkdirat, Openat, Readlinkat,
Renameat, Symlinkat and Unlinkat functions (to conform to POSIX.1-2008)
and make Fchmodat available on all architectures, not just amd64. Also
add the missing AT_* constants.
Generated on Mac OS 10.11 (Darwin 15.6.0) for darwin/amd64 and
darwin/386 only.
Fixesgolang/go#14458
Change-Id: I6d9258864383ea77f9cad058ee8ba2c728213b40
Reviewed-on: https://go-review.googlesource.com/50450
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Add IoctlGetWinsize and IoctlSetWinsize to retreive and manipulate
Winsize structures on Linux, akin to the already existing implementation
on Solaris.
Also remove the named result parameter for IoctlSetInt and
IoctlSetTermios, as they add no additional use.
Change-Id: Id349d1d6a21d5c9a05943f4dcc3a275613ccf7b8
Reviewed-on: https://go-review.googlesource.com/49231
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Add IoctlGetTermios and IoctlGetTermios to retreive and manipulate
Termios structures on Linux, akin to the already existing implementation
or Solaris.
If desired, functions conforming to POSIX tcgetattr/tcsetattr could be
implemented on top of these.
Change-Id: I2a71061bad2e632c597b6f6184ad6374c46a43ee
Reviewed-on: https://go-review.googlesource.com/47330
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Currently Linux' fchmodat(2) syscall implementation doesn't support the
flags parameter (though it might in future versions [1]). Fchmodat in
x/sys/unix takes the parameter and (wrongly) passes it on to the syscall
which will ignore it.
According to the POSIX.1-2008 manual page [2], AT_SYMLINK_NOFOLLOW is
the only valid value for the flags parameter and EOPNOTSUPP should be
returned in case changing the mode of a symbolic link is not supported
by the underlying system. EINVAL should be returned for any other value
of the flags parameter.
[1] https://patchwork.kernel.org/patch/9596301/
[2] http://pubs.opengroup.org/onlinepubs/9699919799/functions/chmod.html
Change the Fchmodat implementation accordingly and also add the
corresponding test.
Fixesgolang/go#20130
Change-Id: I62e677e6674d3702eaf388af0ac3d7e623a35c24
Reviewed-on: https://go-review.googlesource.com/46474
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Add support for the eventfd2 syscall on Linux.
Use the eventfd2 syscall instead of eventfd, as the latter does not
provide a flags argument and glibc also maps its eventfd() function to
the eventfd2 syscall, see the Notes section in
http://man7.org/linux/man-pages/man2/eventfd.2.html
Also add the corresponding flags values EFD_CLOEXEC, EFD_NONBLOCK and
EFD_SEMAPHORE.
Change-Id: Ia8c99e68d5966ab5c7ebe7e45423943fd7d8214e
Reviewed-on: https://go-review.googlesource.com/45093
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This CL adds basic integer get/set functions which wrap a generic
ioctl call. The API is similar the one introduced for solaris/amd64
in CL 14587, but the request parameter has been changed to a uint
instead of an int. This makes requests with a number larger than the
maximum signed 32-bit integer work on linux/386.
For consistency, the solaris/amd64 API has also been updated to make
use of a uint instead of an int for the request number.
Fixesgolang/go#20474
Change-Id: Iaae1ee2e4bb4bfcc420dcec252fe53c8d90ce81d
Reviewed-on: https://go-review.googlesource.com/44009
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This CL adds support for the ADD_KEY, REQUESET_KEY, and KEYCTL syscalls.
These syscalls allow access to the kernel keyring facilities. In C code,
these syscalls are wrapped by the libkeyutils package. See:
http://man7.org/linux/man-pages/man7/keyutils.7.html
The ADD_KEY and REQUEST_KEY calls are fairly straightforward, but the
KEYCTL syscall is a multiplexor for a number of key management
functions. See:
http://man7.org/linux/man-pages/man3/keyctl.3.html
The Go bindings for the KEYCTL functions attempt to replicate what
libkeyutils does. This is done via generated helper functions.
Change-Id: If8c97d4ef5bce14c43dee3e6772ded42dc3c595a
Reviewed-on: https://go-review.googlesource.com/41415
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Introduces the CopyFileRange syscall which first appears in Linux 4.5.
Allows copying file content between file descriptors within the kernel
without transferring data to user space. This syscall also allows the
kernel to take advantage of reflinking or other fast copy methods on
supported file systems.
http://man7.org/linux/man-pages/man2/copy_file_range.2.html
Change-Id: Id365f1e5d4d5ddf7159478e3a13084c9576ebd5c
Reviewed-on: https://go-review.googlesource.com/39992
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
On mips, "struct user" bears no relation to the actual structure used by
PTRACE_GETREGS. The real structure is "struct pt_regs" which is declared
in asm/ptrace.h
Fixesgolang/go#20338.
Change-Id: I604d27bd2b0a0903784380cbd3fa2fd9b9811fa5
Reviewed-on: https://go-review.googlesource.com/43431
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This CL adds in the necessary types and constants to support Linux
filesystem encryption. This includes the structs for the keys and
polices as well as the constants for key size and encryption algorithms.
This code also reduces the scope of some of the regexes in mkerrors.sh.
This is to reduce the number of unrelated constants added in with this
change.
Note that due to a bug in the Linux uapi headers, not all of the
necessary constants and structures are declared in linux/fs.h despite
being part of the kernel ABI. This means that some constants and types
had to be manually added in.
The bug has been patched (https://patchwork.kernel.org/patch/9662723),
and the manual additions can be removed when the patch is merged into
the mainline kernel.
Change-Id: Ib508ad99bdf4c0068933ffcf351c52bb359cfcf4
Reviewed-on: https://go-review.googlesource.com/41417
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Right now the process for adding in new constants, errors, or syscalls
for Linux is a pain and unreliable. The scripts are designed to be run
on the target architecture and use the header files installed on the
user's system. This makes it hard to generate files for all the
architectures or to have consistency between users. See golang/go#15282.
This CL fixes this issue by making all of the files for the 11 supported
architectures directly from source checkouts of Linux, glibc, and bluez.
This is done using Docker, the gcc cross-compilers, and qemu emulation.
Previously discussed here:
https://go-review.googlesource.com/c/37589/
A README.md file is also added to explain how all the parts of the build
system work.
In order to get the build working for all the architectures, I made
some changes to the other scripts called from mkall_linux.go:
- Files only used for generating linux code, moved to linux/
- linux/mksysnum.pl supports a specified CC compiler.
- The generated C code in mkerrors.sh changed to avoid a warning
- mkerrors.sh headers changed to fix powerpc64 bug in sys/ioctl.h
- linux/types.go no longer needs to export Ptrace structs in lowercase
Build instructions:
- Host system needs to be x86-64 Linux
- Install Docker (https://docs.docker.com/engine/installation/)
- ./mkall.sh (That's it!!!)
Change-Id: I87067c14442ba12f8d51991349a43a9d73f38ae0
Reviewed-on: https://go-review.googlesource.com/37943
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
golang.org/x/sys/unix currently does not compile on mips nor mipsle as it fails to set the `isBigEndian` variable. This is due to mips and mipsle being missing in the build tag of their respective endian files.
This change adds mips to the build tag of `endian_big.go` and mipsle to the build tag of `endian_little.go` to fix this issue.
Change-Id: I79947cedb2645e80143e65bde00f2c95261125fb
Reviewed-on: https://go-review.googlesource.com/39730
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This CL introduces the Getrandom syscall. Allowing users of
sufficiently new kernels (3.17) to detect when the operating system
lacks enough entropy to generate cryptographic random data. See:
http://man7.org/linux/man-pages/man2/getrandom.2.html
As we have updated the syscall numbers, the Getrandom function can
just be generated normally. The only other change is to mkerrors.sh
to include the GRND_* flags for getrandom from <linux/random.h>.
It is important to note that currently the mkerrors.sh script cannot
actually be run as it has fallen behind the 4.10 kernel. The GRND_*
flags were added manually.
This was originally part of a larger commit that was split up.
See CL: https://go-review.googlesource.com/37570
Change-Id: I464088a9c9f7224abdcdae476b30a4f2f412d9f5
Reviewed-on: https://go-review.googlesource.com/37589
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The syscall numbers for Linux were out of date, so with the release of
the 4.10 kernel, now seemed like a reasonable time to update them. Note
that this change is mostly additive except that it removes some invalid
syscalls for arm, and it removes all constants that refer to either the
syscall base or total number of syscalls. Previous versions had only
removed some of them.
The updated syscall numbers were pulled directly from a header build
of the 4.10 kernel. This required some minor adjustements to the sysnum
generating perl script and is why the comments at the tops of the
generated files look slightly different. I could include the script I
used to do this, but right now it cannot generate the zerrors and ztypes
files.
Change-Id: Id94b967eb917f8f87500f818f2e494df9bccf2e0
Reviewed-on: https://go-review.googlesource.com/37570
Reviewed-by: Ian Lance Taylor <iant@golang.org>
