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condition: add a condition that matches against the machine tags

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Lennart Poettering
2026-05-21 18:30:16 +02:00
parent 71eac88e5f
commit 461ec6facc
6 changed files with 123 additions and 0 deletions
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src/shared/condition.c
+35
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@@ -35,6 +35,7 @@
#include "glob-util.h"
#include "hmac.h"
#include "hostname-setup.h"
#include "hostname-util.h"
#include "id128-util.h"
#include "ima-util.h"
#include "initrd-util.h"
@@ -316,6 +317,37 @@ static int condition_test_osrelease(Condition *c, char **env) {
return true;
}
static int condition_test_machine_tag(Condition *c, char **env) {
int r;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_MACHINE_TAG);
_cleanup_free_ char *tags = NULL;
r = parse_env_file(
/* f= */ NULL, etc_machine_info(),
"TAGS", &tags);
if (r < 0 && r != -ENOENT) {
log_debug_errno(r, "Failed to read /etc/machine-info, ignoring: %m");
return false;
}
/* Silently ignore invalid tags, matching the Tags D-Bus property */
_cleanup_strv_free_ char **l = NULL;
r = machine_tags_from_string(tags, /* graceful= */ true, &l);
if (r < 0) {
log_debug_errno(r, "Failed to parse machine tags '%s', ignoring: %m", tags);
return false;
}
STRV_FOREACH(i, l)
if (fnmatch(c->parameter, *i, /* flags= */ 0) == 0)
return true;
return false;
}
static int condition_test_memory(Condition *c, char **env) {
CompareOperator operator;
uint64_t m, k;
@@ -1344,6 +1376,7 @@ int condition_test(Condition *c, char **env) {
[CONDITION_ENVIRONMENT] = condition_test_environment,
[CONDITION_CPU_FEATURE] = condition_test_cpufeature,
[CONDITION_OS_RELEASE] = condition_test_osrelease,
[CONDITION_MACHINE_TAG] = condition_test_machine_tag,
[CONDITION_MEMORY_PRESSURE] = condition_test_psi,
[CONDITION_CPU_PRESSURE] = condition_test_psi,
[CONDITION_IO_PRESSURE] = condition_test_psi,
@@ -1471,6 +1504,7 @@ static const char* const _condition_type_table[_CONDITION_TYPE_MAX] = {
[CONDITION_ENVIRONMENT] = "ConditionEnvironment",
[CONDITION_CPU_FEATURE] = "ConditionCPUFeature",
[CONDITION_OS_RELEASE] = "ConditionOSRelease",
[CONDITION_MACHINE_TAG] = "ConditionMachineTag",
[CONDITION_MEMORY_PRESSURE] = "ConditionMemoryPressure",
[CONDITION_CPU_PRESSURE] = "ConditionCPUPressure",
[CONDITION_IO_PRESSURE] = "ConditionIOPressure",
@@ -1528,6 +1562,7 @@ static const char* const _assert_type_table[_CONDITION_TYPE_MAX] = {
[CONDITION_ENVIRONMENT] = "AssertEnvironment",
[CONDITION_CPU_FEATURE] = "AssertCPUFeature",
[CONDITION_OS_RELEASE] = "AssertOSRelease",
[CONDITION_MACHINE_TAG] = "AssertMachineTag",
[CONDITION_MEMORY_PRESSURE] = "AssertMemoryPressure",
[CONDITION_CPU_PRESSURE] = "AssertCPUPressure",
[CONDITION_IO_PRESSURE] = "AssertIOPressure",