[Libguestfs] [PATCH guestfs-tools] customize: Implement --chown option

This currently only works with numeric UID.GID. In theory in future we could look up IDs from the guest password file (eg. using Augeas) and do the right thing, but that's a bunch more work. For example: $ ./builder/virt-builder fedora-36 --chown 1.1:/var/tmp [ 1.0] Downloading: http://builder.libguestfs.org/fedora-36.xz [ 1.5] Planning how to build this image [ 1.5] Uncompressing [ 3.4] Opening the new disk [ 7.3] Setting a random seed [ 7.3] Changing owner of /var/tmp to 1.1 [ 7.3] Setting passwords virt-builder: Setting random password of root to x8fu6z7QNEdPeZHF [ 7.8] SELinux relabelling [ 12.0] Finishing off Output file: fedora-36.img Output size: 6.0G Output format: raw Total usable space: 6.0G Free space: 4.7G (79%) $ guestfish -a fedora-36.img -i ll /var total 8 drwxr-xr-x. 18 root root 4096 May 12 2022 . dr-xr-xr-x. 18 root root 235 May 12 2022 .. drwxr-xr-x. 2 root root 6 Jan 20 2022 adm drwxr-xr-x. 9 root root 101 May 12 2022 cache drwxr-xr-x. 3 root root 18 May 12 2022 db drwxr-xr-x. 2 root root 6 Jan 20 2022 empty drwxr-xr-x. 2 root root 6 Jan 20 2022 ftp drwxr-xr-x. 2 root root 6 Jan 20 2022 games drwxr-xr-x. 3 root root 18 Apr 5 2022 kerberos drwxr-xr-x. 24 root root 4096 May 12 2022 lib drwxr-xr-x. 2 root root 6 Jan 20 2022 local lrwxrwxrwx. 1 root root 11 May 12 2022 lock -> ../run/lock drwxr-xr-x. 8 root root 105 May 12 2022 log lrwxrwxrwx. 1 root root 10 Jan 20 2022 mail -> spool/mail drwxr-xr-x. 2 root root 6 Jan 20 2022 nis drwxr-xr-x. 2 root root 6 Jan 20 2022 opt drwxr-xr-x. 2 root root 6 Jan 20 2022 preserve lrwxrwxrwx. 1 root root 6 May 12 2022 run -> ../run drwxr-xr-x. 5 root root 45 May 12 2022 spool drwxrwxrwt. 2 bin bin 6 May 12 2022 tmp drwxr-xr-x. 2 root root 6 Jan 20 2022 yp Fixes: https://github.com/rwmjones/guestfs-tools/issues/12 --- common | 2 +- customize/customize_run.ml | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/common b/common index 420892e660..bbb54714ce 160000 --- a/common +++ b/common @@ -1 +1 @@ -Subproject commit 420892e660726c7184c000b9b86b11f491a5a126 +Subproject commit bbb54714ce24c76e5761d96a0227a753896dc4c4 diff --git a/customize/customize_run.ml b/customize/customize_run.ml index f03774e003..409b46edc6 100644 --- a/customize/customize_run.ml +++ b/customize/customize_run.ml @@ -153,6 +153,17 @@ let run (g : G.guestfs) root (ops : ops) = let mode = if String.is_prefix mode "0" then "0o" ^ mode else mode in g#chmod (int_of_string mode) path + | `Chown (uid_gid, path) -> + let uid, gid = String.split "." uid_gid in + let uid, gid = + try int_of_string uid, int_of_string gid + with Failure _ -> + error (f_"--chown: could not parse numeric UID.GID from \ + %s") uid_gid in + + message (f_"Changing owner of %s to %d.%d") path uid gid; + g#chown uid gid path + | `Command cmd -> message (f_"Running: %s") cmd; do_run ~display:cmd cmd -- 2.41.0