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Merge pull request #27398 from yuwata/udev-rule-negative-match

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udev-rule: fix negative match
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2023-04-26 16:40:01 +02:00 committed by GitHub
commit 1db4acbe5d
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3 changed files with 19 additions and 11 deletions
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15
man/udev.xml
View File

@ -186,10 +186,10 @@
<varlistentry>
<term><varname>SYMLINK</varname></term>
<listitem>
<para>Match the name of a symlink targeting the node. It can
be used once a SYMLINK key has been set in one of the preceding
rules. There may be multiple symlinks; only one needs to match.
</para>
<para>Match the name of a symlink targeting the node. It can be used once a SYMLINK key has
been set in one of the preceding rules. There may be multiple symlinks; only one needs to
match. If the operator is <literal>!=</literal>, the token returns true only if there is no
symlink matched.</para>
</listitem>
</varlistentry>
@ -287,14 +287,17 @@
<varlistentry>
<term><varname>TAG</varname></term>
<listitem>
<para>Match against a device tag.</para>
<para>Match against one of device tags. It can be used once a TAG key has been set in one of
the preceding rules. There may be multiple tags; only one needs to match. If the operator is
<literal>!=</literal>, the token returns true only if there is no tag matched.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>TAGS</varname></term>
<listitem>
<para>Search the devpath upwards for a device with matching tag.</para>
<para>Search the devpath upwards for a device with matching tag. If the operator is
<literal>!=</literal>, the token returns true only if there is no tag matched.</para>
</listitem>
</varlistentry>

4
src/udev/udev-rules.c
View File

@ -1896,7 +1896,7 @@ static int udev_rule_apply_token_to_event(
const char *val;
FOREACH_DEVICE_DEVLINK(dev, val)
if (token_match_string(token, strempty(startswith(val, "/dev/"))))
if (token_match_string(token, strempty(startswith(val, "/dev/"))) == (token->op == OP_MATCH))
return token->op == OP_MATCH;
return token->op == OP_NOMATCH;
}
@ -1926,7 +1926,7 @@ static int udev_rule_apply_token_to_event(
const char *val;
FOREACH_DEVICE_CURRENT_TAG(dev, val)
if (token_match_string(token, val))
if (token_match_string(token, val) == (token->op == OP_MATCH))
return token->op == OP_MATCH;
return token->op == OP_NOMATCH;
}

11
test/udev-test.pl
View File

@ -231,7 +231,8 @@ EOF
"string_escape___replace/foo_bbb",
"env_with_space",
"default/replace/mode_foo__hoge",
"replace_env_harder_foo__hoge"],
"replace_env_harder_foo__hoge",
"match", "unmatch"],
not_exp_links => ["removed1", "removed2", "removed3", "unsafe/../../path", "/nondev/path/will/be/refused"],
}],
rules => <<EOF
@ -250,6 +251,8 @@ SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", ATTRS{model}=="ST910021AS", OPTIONS="s
SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", ATTRS{model}=="ST910021AS", ENV{.HOGE}="env with space", SYMLINK+="%E{.HOGE}"
SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", ATTRS{model}=="ST910021AS", ENV{.HOGE}="default/replace/mode?foo;;hoge", SYMLINK+="%E{.HOGE}"
SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", ATTRS{model}=="ST910021AS", OPTIONS="string_escape=replace", ENV{.HOGE}="replace/env/harder?foo;;hoge", SYMLINK+="%E{.HOGE}"
SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", ATTRS{model}=="ST910021AS", SYMLINK=="link1", SYMLINK+="match"
SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", ATTRS{model}=="ST910021AS", SYMLINK!="removed1", SYMLINK+="unmatch"
EOF
},
{
@ -1853,13 +1856,15 @@ EOF
devices => [
{
devpath => "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
exp_links => ["found"],
not_exp_name => "bad",
exp_links => ["found", "found2"],
not_exp_name => ["bad", "bad2"],
}],
rules => <<EOF
KERNEL=="sda", TAG="foo"
TAGS=="foo|", SYMLINK+="found"
TAGS=="aaa|", SYMLINK+="bad"
KERNEL=="sda", TAGS!="hoge", SYMLINK+="found2"
KERNEL=="sda", TAGS!="foo", SYMLINK+="bad2"
EOF
},
{