Access Violation error when compiling packets in Gentoo – symlink

Here is another example of Access violation error when building packages in Gentoo. This time the build process could not make a symbolic link in “/usr/bin” and the build process of the package failed with:

 * ACCESS DENIED:  symlink:      /usr/bin/stransmit
CMake Error: failed to create symbolic link '/usr/bin/stransmit': permission denied

A detail explanation is available in our first article on the subject here – Access Violation error, when compiling packets in Gentoo.
All packages are built in a sandbox and there is a sandbox configuration in

/etc/sandbox.d/00default

, which instruct the build process where could write. If you get such error in 99.99% there is a bug in the package and if you do not want to wait for fixing it (report it!) you can manually edit the SANDBOX_WRITE variable and add the path, which causes the build failure. Build the package and remove the added path!!! Or you risk to make your system less secure!

We have problem with building the package “net-libs/srt-1.3.1”

srv1 src # emerge -v net-libs/srt

These are the packages that would be merged, in order:

[ebuild  N     ] net-libs/srt-1.3.1::gentoo  USE="-doc -gnutls -libressl" ABI_X86="32 (64) (-x32)" 0 KiB

Total: 1 package (1 new), Size of downloads: 0 KiB

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) net-libs/srt-1.3.1::gentoo
 * srt-1.3.1.tar.gz BLAKE2B SHA512 size 😉 ...                                                                                                        [ ok ]
>>> Unpacking source...
.....
.....
>>> Install srt-1.3.1 into /var/tmp/portage/net-libs/srt-1.3.1/image/ category net-libs
 * abi_x86_32.x86: running multilib-minimal_abi_src_install
>>> Working in BUILD_DIR: "/var/tmp/portage/net-libs/srt-1.3.1/work/srt-1.3.1-abi_x86_32.x86"
make -j6 -l10 install 
[ 28%] Built target haicrypt_virtual
[ 40%] Built target srtsupport_virtual
[ 80%] Built target srt_virtual
[ 83%] Built target srt_static
[ 85%] Built target srt_shared
[ 90%] Built target srt-file-transmit
[ 95%] Built target srt-live-transmit
[100%] Built target srt-multiplex
Install the project...
-- Install configuration: "Gentoo"
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib32/libsrt.so.1.3.1
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib32/libsrt.so.1
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib32/libsrt.so
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib32/libsrt.a
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/version.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/srt.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/logging_api.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/platform_sys.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/udt.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/srt4udt.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib32/pkgconfig/haisrt.pc
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib32/pkgconfig/srt.pc
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-live-transmit
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-live-transmit
 * ACCESS DENIED:  symlink:      /usr/bin/stransmit
CMake Error: failed to create symbolic link '/usr/bin/stransmit': permission denied
-- Created symlink: /usr/bin/stransmit -> srt-live-transmit
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-file-transmit
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-file-transmit
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-multiplex
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-multiplex
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-ffplay
 * abi_x86_64.amd64: running multilib-minimal_abi_src_install
>>> Working in BUILD_DIR: "/var/tmp/portage/net-libs/srt-1.3.1/work/srt-1.3.1-abi_x86_64.amd64"
make -j6 -l10 install 
[ 11%] Built target srtsupport_virtual
[ 52%] Built target srt_virtual
[ 80%] Built target haicrypt_virtual
[ 83%] Built target srt_static
[ 85%] Built target srt_shared
[ 90%] Built target srt-multiplex
[ 95%] Built target srt-file-transmit
[100%] Built target srt-live-transmit
Install the project...
-- Install configuration: "Gentoo"
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib64/libsrt.so.1.3.1
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib64/libsrt.so.1
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib64/libsrt.so
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib64/libsrt.a
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/version.h
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/srt.h
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/logging_api.h
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/platform_sys.h
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/udt.h
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/include/srt/srt4udt.h
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib64/pkgconfig/haisrt.pc
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/lib64/pkgconfig/srt.pc
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-live-transmit
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-live-transmit
 * ACCESS DENIED:  symlink:      /usr/bin/stransmit
CMake Error: failed to create symbolic link '/usr/bin/stransmit': permission denied
-- Created symlink: /usr/bin/stransmit -> srt-live-transmit
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-file-transmit
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-file-transmit
-- Installing: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-multiplex
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-multiplex
-- Up-to-date: /var/tmp/portage/net-libs/srt-1.3.1/image/usr/bin/srt-ffplay
>>> Completed installing srt-1.3.1 into /var/tmp/portage/net-libs/srt-1.3.1/image/

 * Final size of build directory: 14632 KiB (14.2 MiB)
 * Final size of installed tree:   5324 KiB ( 5.1 MiB)

 * --------------------------- ACCESS VIOLATION SUMMARY ---------------------------
 * LOG FILE: "/var/log/sandbox/sandbox-25570.log"
 * 
VERSION 1.0
FORMAT: F - Function called
FORMAT: S - Access Status
FORMAT: P - Path as passed to function
FORMAT: A - Absolute Path (not canonical)
FORMAT: R - Canonical Path
FORMAT: C - Command Line

F: symlink
S: deny
P: /usr/bin/stransmit
A: /usr/bin/stransmit
R: /usr/bin/stransmit
C: /usr/bin/cmake -E create_symlink srt-live-transmit /usr/bin/stransmit 

F: symlink
S: deny
P: /usr/bin/stransmit
A: /usr/bin/stransmit
R: /usr/bin/stransmit
C: /usr/bin/cmake -E create_symlink srt-live-transmit /usr/bin/stransmit 
 * --------------------------------------------------------------------------------

>>> Failed to emerge net-libs/srt-1.3.1, Log file:

>>>  '/var/tmp/portage/net-libs/srt-1.3.1/temp/build.log'

In the installation phase occurred the package failure leaving half installed package. So we edited the “/etc/sandbox.d/00default” and added “:/usr/bin” at the end of SANDBOX_WRITE:

SANDBOX_WRITE="/usr/tmp/conftest:/usr/lib/conftest:/usr/lib32/conftest:/usr/lib64/conftest:/usr/tmp/cf:/usr/lib/cf:/usr/lib32/cf:/usr/lib64/cf:/usr/bin"

Then rebuild the package with emerge and remove the added path “:/usr/bin”. This is a dirty workaround, but it will allow you to use srt (and as a dependency to another packages’ installation).

Access Violation error, when compiling packets in Gentoo

Sometimes if you try to emerge a package in Gentoo you could receive error in the configure phase of the compilation process. The example below is with the emerging the PHP – dev-lang/php-5.6.33:5.6::gentoo, but could happen with many other packages, which are rather old and probably not maintained or the sandbox or even the portage packages are old.
So here is the error and the compilation stops:

srv ~ # emerge -av --nodeps "<php-7"
...
checking for mmap() using MAP_ANON shared memory support... yes
checking for mmap() using /dev/zero shared memory support... yes
checking for mmap() using shm_open() shared memory support...  * ACCESS DENIED:  open_wr:      /run/test.shm.8811LBKone
no
checking for mmap() using regular file shared memory support... yes
...
checking for mmap() using MAP_ANON shared memory support... yes
checking for mmap() using /dev/zero shared memory support... yes
checking for mmap() using shm_open() shared memory support...  * ACCESS DENIED:  open_wr:      /run/test.shm.180309hAMbj
no
checking for mmap() using regular file shared memory support... yes
....
Thank you for using PHP.
config.status: creating php5.spec
config.status: creating main/build-defs.h
config.status: creating scripts/phpize
config.status: creating scripts/man1/phpize.1
config.status: creating scripts/php-config
config.status: creating scripts/man1/php-config.1
config.status: creating ext/phar/phar.1
config.status: creating ext/phar/phar.phar.1
config.status: creating main/php_config.h
config.status: executing libtool commands
config.status: executing default commands
>>> Source configured.
 * --------------------------- ACCESS VIOLATION SUMMARY ---------------------------
 * LOG FILE: "/var/log/sandbox/sandbox-13466.log"
 * 
VERSION 1.0
FORMAT: F - Function called
FORMAT: S - Access Status
FORMAT: P - Path as passed to function
FORMAT: A - Absolute Path (not canonical)
FORMAT: R - Canonical Path
FORMAT: C - Command Line

F: open_wr
S: deny
P: /run/test.shm.21532Xx6ViE
A: /run/test.shm.21532Xx6ViE
R: /run/test.shm.21532Xx6ViE
C: ./conftest 

F: open_wr
S: deny
P: /run/test.shm.31817hurGxH
A: /run/test.shm.31817hurGxH
R: /run/test.shm.31817hurGxH
C: ./conftest 

F: open_wr
S: deny
P: /run/test.shm.8811LBKone
A: /run/test.shm.8811LBKone
R: /run/test.shm.8811LBKone
C: ./conftest 

F: open_wr
S: deny
P: /run/test.shm.180309hAMbj
A: /run/test.shm.180309hAMbj
R: /run/test.shm.180309hAMbj
C: ./conftest 
 * --------------------------------------------------------------------------------

>>> Failed to emerge dev-lang/php-5.6.33, Log file:

>>>  '/var/tmp/portage/dev-lang/php-5.6.33/temp/build.log'

You could try adding “-sandbox” to feature in “/etc/portage/make.conf”

FEATURES="-sandbox"

But

the sandbox feature is very important and should not be disabled by default.

And that’s why sometime when you disable it with “-sandbox” you still get access violation and you still cannot install/compile the package!
The thing is you see the error and you can fix it easily. The important part is the directory, which causes the error, in the above example with “dev-lang/php”, but could be any other Gentoo package, the problem is the writing permission for files in “/run” directory. So open the configuration file

/etc/sandbox.d/00default

and you’ll see the there is a variable called SANDBOX_WRITE, which accept paths. If you add to this variable at the end the directory “/run” or your access violated directory you’ll be able to install/compile your package with no problems, for the above problem the solution was:

SANDBOX_WRITE="/usr/tmp/conftest:/usr/lib/conftest:/usr/lib32/conftest:/usr/lib64/conftest:/usr/tmp/cf:/usr/lib/cf:/usr/lib32/cf:/usr/lib64/cf:/run"