Fixes <https://bugs.gnu.org/44261>.
Reported by Jan Nieuwenhuizen <janneke@gnu.org>.
* gnu/packages/aux-files/run-in-namespace.c (exec_in_user_namespace):
Add call to 'prctl'. Call 'mount' for NEW_ROOT and define 'is_tmpfs'.
When IS_TMPFS is true, call 'umount' and 'rmdir' after 'waitpid';
otherwise, call 'rm_rf' only when 'waitpid' returns -1 the second time.
(exec_with_loader): Call 'prctl'. Remove NEW_ROOT only when 'waitpid'
returns -1 the second time, otherwise leave it behind.
* tests/guix-pack-relocatable.sh (wait_for_file): New function.
Add test.
Fixes wrapping of non-package things, where the target store directory may
differ in length from the original.
* guix/scripts/pack.scm (wrapped-package)<build-wrapper>: Define
WRAPPER_PROGRAM macro with wrapper's file name.
* gnu/packages/aux-files/run-in-namespace.c (main): Offset index by len of
that file name.
Until now, when using the "fakechroot" engine, $LD_LIBRARY_PATH would
always be ignored. However, it's useful in some cases to allow users to
specify LD_LIBRARY_PATH, so honor it.
* gnu/packages/aux-files/run-in-namespace.c (concat_paths): New function.
(exec_with_loader): Concatenante $LD_LIBRARY_PATH to the relocated
AUDIT_LIBRARY_PATH.
Previously it would silently fail to create the /gnu/store symlink when
the host has a read-only /gnu as is the case in these tests.
* gnu/packages/aux-files/run-in-namespace.c (exec_with_loader): Unlink
the ancestor of ORIGINAL_STORE under NEW_ROOT. Check the return value
of 'symlink' when creating NEW_STORE.
* tests/guix-pack-relocatable.sh: Check the contents of the store as
seen by the wrapped executable, with all three engines, and with both
"/gnu" and "/gnu/store" erased.
Fixes <https://bugs.gnu.org/42558>.
Until now, loading 'pack-audit.so' in a truly non-Guix environment would
usually fail because 'pack-audit.so' depends on 'libgcc_s.so' and
'libc.so', none of which could be found.
Furthermore, the test was not working as expected: the trick
unshare -mrf sh -c 'mount -t tmpfs none /gnu ; ...'
would allow the fakechroot engine to make its store available as
/gnu/store as a result of another bug.
* gnu/packages/aux-files/run-in-namespace.c (relocated_search_path): New
function.
(exec_with_loader): Pass "--library-path" to the loader.
* guix/scripts/pack.scm (wrapped-package)[build](runpath): New procedure.
(elf-loader-compile-flags): Pass "-DLOADER_AUDIT_RUNPATH".
* tests/guix-pack-relocatable.sh: Remove 'STORE_PARENT'.
(run_without_store): New function. Erase $NIX_STORE_DIR instead of
$STORE_PARENT.
Use 'run_without_store' throughout.
* gnu/packages/aux-files/run-in-namespace.c (HAVE_EXEC_WITH_LOADER): New
macro.
(bind_mount): Rename to...
(mirror_directory): ... this. Add 'firmlink' argument and use it
instead of calling mkdir/open/close/mount directly.
(bind_mount, make_symlink): New functions.
(exec_in_user_namespace): Adjust accordingly.
(exec_with_loader) [HAVE_EXEC_WITH_LOADER]: New function.
(exec_performance): New function.
(engines): Add them.
* guix/scripts/pack.scm (wrapped-package)[fakechroot-library]
[audit-module]: New procedures.
[audit-source]: New variable.
[build](elf-interpreter, elf-loader-compile-flags): New procedures.
(build-wrapper): Use them.
* tests/guix-pack-relocatable.sh: Test with
'GUIX_EXECUTION_ENGINE=fakechroot'.
* doc/guix.texi (Invoking guix pack): Document the 'performance' and
'fakechroot' engines.
* gnu/packages/aux-files/pack-audit.c: New file.
* Makefile.am (AUX_FILES): Add it.
* gnu/packages/aux-files/run-in-namespace.c (original_store): New variable.
(exec_in_user_namespace, exec_with_proot, main): Use it instead of the
literal "@STORE_DIRECTORY@".
* gnu/packages/aux-files/run-in-namespace.c (struct engine): New type.
(exec_default): New function.
(engines): New variable.
(execution_engine): New function.
(main): Use it instead of calling 'exec_in_user_namespace' and
'exec_with_proot' directly.
* tests/guix-pack-relocatable.sh: Add test with 'GUIX_EXECUTION_ENGINE'.
* doc/guix.texi (Invoking guix pack): Document 'GUIX_EXECUTION_ENGINE'.
Fixes <https://bugs.gnu.org/40816>.
Reported by Jan (janneke) Nieuwenhuizen <janneke@gnu.org>.
* gnu/packages/aux-files/run-in-namespace.c (main): In the 'default'
case, check 'WIFEXITED (status)' and exit with the corresponding code in
that case. Exit with 255 in other cases.
* tests/guix-pack-relocatable.sh: Add test.
* gnu/packages/aux-files/run-in-namespace.c (exec_with_proot): New
function.
(main): When 'clone' fails, call 'rm_rf'.
[PROOT_PROGRAM]: When 'clone' fails, call 'exec_with_proot'.
* guix/scripts/pack.scm (wrapped-package): Add #:proot?.
[proot]: New procedure.
[build]: Compile with -DPROOT_PROGRAM when PROOT? is true.
* guix/scripts/pack.scm (%options): Set the 'relocatable?' value to
'proot when "-R" is passed several times.
(guix-pack): Pass #:proot? to 'wrapped-package'.
* tests/guix-pack-relocatable.sh: Use "-RR" on Intel systems that lack
user namespace support.
* doc/guix.texi (Invoking guix pack): Document -RR.
* gnu/packages/aux-files/run-in-namespace.c (write_id_map)
(disallow_setgroups): New functions.
(main): Use 'clone' via 'syscall' instead of 'fork' followed by
'unshare'. Add calls to 'disallow_setgroups' and 'write_id_map' in the
parent process.
* gnu/packages/aux-files/run-in-namespace.c: New file.
* Makefile.am (AUX_FILES): Add it.
* guix/scripts/pack.scm (<c-compiler>): New record type.
(c-compiler, bootstrap-c-compiler, c-compiler-compiler): New procedures.
(self-contained-tarball): Use
'relative-file-name' for the SOURCE -> TARGET symlink.
(docker-image): Add 'defmod' to please Geiser.
(wrapped-package, map-manifest-entries): New procedures.
(%options, show-help): Add --relocatable.
(guix-pack): Honor it.
