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portable: allow reattaching when one image has a version and the other does not

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A reattach might go from img.raw to img_0.1.raw or viceversa, but this is
not allowed right now as we try to match the full name.

Also take into account that running strcspn(a, '/') on an image name, without
leading path, will return the length of the full string, but the versions
might be different so they won't match, eg:

img_0.1.raw -> 12
img_0.1.1.raw -> 14

So adjust the check to take that into account, and skip it if we are not
dealing with directories
This commit is contained in:
Luca Boccassi 2022-03-23 21:29:04 +00:00 committed by Luca Boccassi
parent f09f6dc2c8
commit 2350712e32
2 changed files with 21 additions and 2 deletions
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15
src/portable/portable.c
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@ -1429,17 +1429,28 @@ static bool marker_matches_images(const char *marker, const char *name_or_path,
size_t l;
/* We shall match against a path. Let's ignore any prefix here though, as often there are many ways to
* reach the same file. However, in this mode, let's validate any file suffix. */
* reach the same file. However, in this mode, let's validate any file suffix.
* But also ensure that we don't fail if both components don't have a '/' at all
* (strcspn returns the full length of the string in that case, which might not
* match as the versions might differ). */
l = strcspn(a, "/");
b = last_path_component(*image_name_or_path);
if (strcspn(b, "/") != l)
if ((a[l] != '/') != !strchr(b, '/')) /* One is a directory, the other is not */
return false;
if (a[l] != 0 && strcspn(b, "/") != l)
return false;
underscore = strchr(b, '_');
if (underscore)
l = underscore - b;
else { /* Either component could be versioned */
underscore = strchr(a, '_');
if (underscore)
l = underscore - a;
}
if (!strneq(a, b, l))
return false;

8
test/units/testsuite-29.sh
View File

@ -88,6 +88,14 @@ systemctl is-active app1.service
status="$(portablectl is-attached --extension app1 minimal_0)"
[[ "${status}" == "running-runtime" ]]
# Ensure that adding or removing a version to the image doesn't break reattaching
cp /usr/share/app1.raw /tmp/app1_2.raw
portablectl "${ARGS[@]}" reattach --now --runtime --extension /tmp/app1_2.raw /usr/share/minimal_1.raw app1
systemctl is-active app1.service
status="$(portablectl is-attached --extension app1_2 minimal_1)"
[[ "${status}" == "running-runtime" ]]
portablectl "${ARGS[@]}" reattach --now --runtime --extension /usr/share/app1.raw /usr/share/minimal_1.raw app1
systemctl is-active app1.service