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podman: new option --preserve-fd

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add a new option --preserve-fd that allows to specify a list of FDs to
pass down to the container.

It is similar to --preserve-fds but it allows to specify a list of FDs
instead of the maximum FD number to preserve.

--preserve-fd and --preserve-fds are mutually exclusive.

It requires crun since runc would complain if any fd below
--preserve-fds is not preserved.

Closes: https://github.com/containers/podman/issues/20844

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano
2023-12-01 11:49:29 +01:00
parent 6b9221d852
commit 01d397a658
19 changed files with 172 additions and 23 deletions
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5
pkg/specgen/specgen.go
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@ -180,6 +180,11 @@ type ContainerBasicConfig struct {
// set tags as `json:"-"` for not supported remote
// Optional.
PreserveFDs uint `json:"-"`
// PreserveFD is a list of additional file descriptors (in addition
// to 0, 1, 2) that will be passed to the executed process.
// set tags as `json:"-"` for not supported remote
// Optional.
PreserveFD []uint `json:"-"`
// Timezone is the timezone inside the container.
// Local means it has the same timezone as the host machine
// Optional.