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| author | Ludovic Courtès <ludovic.courtes@inria.fr> | 2019-03-14 17:02:53 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2019-03-15 23:27:59 +0100 |
| commit | 99aec37a78e7be6a591d0e5b7439896d669a75d1 (patch) | |
| tree | 0187d4cf990037f7f2782f6b5dca650a8bb7eaaa /gnu/packages/aux-files/run-in-namespace.c | |
| parent | c9b3a72b6792c8195b0cdd8e5d7809db29419c7d (diff) | |
| download | guix-99aec37a78e7be6a591d0e5b7439896d669a75d1.tar.gz | |
pack: "-RR" produces PRoot-enabled relocatable binaries.
* 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.
Diffstat (limited to 'gnu/packages/aux-files/run-in-namespace.c')
| -rw-r--r-- | gnu/packages/aux-files/run-in-namespace.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/gnu/packages/aux-files/run-in-namespace.c b/gnu/packages/aux-files/run-in-namespace.c index f0cff88552..551f4db88a 100644 --- a/gnu/packages/aux-files/run-in-namespace.c +++ b/gnu/packages/aux-files/run-in-namespace.c @@ -1,5 +1,5 @@ /* GNU Guix --- Functional package management for GNU - Copyright (C) 2018 Ludovic Courtès <ludo@gnu.org> + Copyright (C) 2018, 2019 Ludovic Courtès <ludo@gnu.org> This file is part of GNU Guix. @@ -212,6 +212,46 @@ disallow_setgroups (pid_t pid) } +#ifdef PROOT_PROGRAM + +/* Execute the wrapped program with PRoot, passing it ARGC and ARGV, and + "bind-mounting" STORE in the right place. */ +static void +exec_with_proot (const char *store, int argc, char *argv[]) +{ + int proot_specific_argc = 4; + int proot_argc = argc + proot_specific_argc; + char *proot_argv[proot_argc], *proot; + char bind_spec[strlen (store) + 1 + sizeof "@STORE_DIRECTORY@"]; + + strcpy (bind_spec, store); + strcat (bind_spec, ":"); + strcat (bind_spec, "@STORE_DIRECTORY@"); + + proot = concat (store, PROOT_PROGRAM); + + proot_argv[0] = proot; + proot_argv[1] = "-b"; + proot_argv[2] = bind_spec; + proot_argv[3] = "@WRAPPED_PROGRAM@"; + + for (int i = 0; i < argc; i++) + proot_argv[i + proot_specific_argc] = argv[i + 1]; + + proot_argv[proot_argc] = NULL; + + /* Seccomp support seems to invariably lead to segfaults; disable it by + default. */ + setenv ("PROOT_NO_SECCOMP", "1", 0); + + int err = execv (proot, proot_argv); + if (err < 0) + assert_perror (errno); +} + +#endif + + int main (int argc, char *argv[]) { @@ -274,6 +314,10 @@ main (int argc, char *argv[]) break; case -1: + rm_rf (new_root); +#ifdef PROOT_PROGRAM + exec_with_proot (store, argc, argv); +#else fprintf (stderr, "%s: error: 'clone' failed: %m\n", argv[0]); fprintf (stderr, "\ This may be because \"user namespaces\" are not supported on this system.\n\ @@ -281,6 +325,7 @@ Consequently, we cannot run '@WRAPPED_PROGRAM@',\n\ unless you move it to the '@STORE_DIRECTORY@' directory.\n\ \n\ Please refer to the 'guix pack' documentation for more information.\n"); +#endif return EXIT_FAILURE; default: |