[bug#48889] [PATCH 2/4] Ceph: patch rbd to use $PATH lookups for modprobe

[Maxime Devos <maximedevos@telenet.be>]

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Ryan Sundberg via Guix-patches via schreef op zo 06-06-2021 om 11:52 [-0700]:
> Removes hardcoded paths assumed in /sbin and /bin compiled into the
> `rbd` tool.
> 
> Patch originally discussed at https://github.com/ceph/ceph/pull/20938
> and rejected by upstream for ambiguous security concerns related to
> relative paths.
> ---
>  .../patches/ceph-relative-paths.patch         | 22 +++++++++++++++++++
>  gnu/packages/storage.scm                      |  2 +-
>  2 files changed, 23 insertions(+), 1 deletion(-)
>  create mode 100644 gnu/packages/patches/ceph-relative-paths.patch
> 
> diff --git a/gnu/packages/patches/ceph-relative-paths.patch b/gnu/packages/patches/ceph-relative-paths.patch
> new file mode 100644
> index 0000000000..e1b1d3599f
> --- /dev/null
> +++ b/gnu/packages/patches/ceph-relative-paths.patch
> @@ -0,0 +1,22 @@
> +diff --git a/src/common/module.c b/src/common/module.c
> +index f19f74324c..53355b8185 100644
> +--- a/src/common/module.c
> ++++ b/src/common/module.c
> +@@ -66,7 +66,7 @@ int module_has_param(const char *module, const char *param)
> + 	char command[128];
> + 
> + 	snprintf(command, sizeof(command),
> +-		 "/sbin/modinfo -F parm %s | /bin/grep -q ^%s:",
> ++		 "modinfo -F parm %s | grep -q ^%s:",

modinfo is not necessarily in the profile. I'd recommend
using substitute* from a build phase to replace
/sbin/modinfo with the appropriate /gnu/store path.
((string-append (assoc-ref inputs "???") "/sbin/modinfo")
or something like that, were you'll need to replace "???")

> +-	snprintf(command, sizeof(command), "/sbin/modprobe %s %s",
> ++	snprintf(command, sizeof(command), "modprobe %s %s",
> + 		 module, (options ? options : ""));

Likewise.

Greetings,
Maxime.

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