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-rw-r--r--src/shared/bus-print-properties.c462
1 files changed, 462 insertions, 0 deletions
diff --git a/src/shared/bus-print-properties.c b/src/shared/bus-print-properties.c
new file mode 100644
index 0000000..4cea250
--- /dev/null
+++ b/src/shared/bus-print-properties.c
@@ -0,0 +1,462 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "bus-print-properties.h"
+#include "cap-list.h"
+#include "cgroup-util.h"
+#include "escape.h"
+#include "mountpoint-util.h"
+#include "nsflags.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "time-util.h"
+#include "user-util.h"
+
+int bus_print_property_value(const char *name, const char *expected_value, bool only_value, const char *value) {
+ assert(name);
+
+ if (expected_value && !streq_ptr(expected_value, value))
+ return 0;
+
+ if (only_value)
+ puts(value);
+ else
+ printf("%s=%s\n", name, value);
+
+ return 0;
+}
+
+int bus_print_property_valuef(const char *name, const char *expected_value, bool only_value, const char *fmt, ...) {
+ va_list ap;
+ int r;
+
+ assert(name);
+ assert(fmt);
+
+ if (expected_value) {
+ _cleanup_free_ char *s = NULL;
+
+ va_start(ap, fmt);
+ r = vasprintf(&s, fmt, ap);
+ va_end(ap);
+ if (r < 0)
+ return -ENOMEM;
+
+ if (streq_ptr(expected_value, s)) {
+ if (only_value)
+ puts(s);
+ else
+ printf("%s=%s\n", name, s);
+ }
+
+ return 0;
+ }
+
+ if (!only_value)
+ printf("%s=", name);
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
+ puts("");
+
+ return 0;
+}
+
+static int bus_print_property(const char *name, const char *expected_value, sd_bus_message *m, bool value, bool all) {
+ char type;
+ const char *contents;
+ int r;
+
+ assert(name);
+ assert(m);
+
+ r = sd_bus_message_peek_type(m, &type, &contents);
+ if (r < 0)
+ return r;
+
+ switch (type) {
+
+ case SD_BUS_TYPE_STRING: {
+ const char *s;
+
+ r = sd_bus_message_read_basic(m, type, &s);
+ if (r < 0)
+ return r;
+
+ if (all || !isempty(s)) {
+ bool good;
+
+ /* This property has a single value, so we need to take
+ * care not to print a new line, everything else is OK. */
+ good = !strchr(s, '\n');
+ bus_print_property_value(name, expected_value, value, good ? s : "[unprintable]");
+ }
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_BOOLEAN: {
+ int b;
+
+ r = sd_bus_message_read_basic(m, type, &b);
+ if (r < 0)
+ return r;
+
+ if (expected_value && parse_boolean(expected_value) != b)
+ return 1;
+
+ bus_print_property_value(name, NULL, value, yes_no(b));
+ return 1;
+ }
+
+ case SD_BUS_TYPE_UINT64: {
+ uint64_t u;
+
+ r = sd_bus_message_read_basic(m, type, &u);
+ if (r < 0)
+ return r;
+
+ /* Yes, heuristics! But we can change this check
+ * should it turn out to not be sufficient */
+
+ if (endswith(name, "Timestamp") ||
+ STR_IN_SET(name, "NextElapseUSecRealtime", "LastTriggerUSec", "TimeUSec", "RTCTimeUSec")) {
+ char timestamp[FORMAT_TIMESTAMP_MAX];
+ const char *t;
+
+ t = format_timestamp(timestamp, sizeof(timestamp), u);
+ if (t || all)
+ bus_print_property_value(name, expected_value, value, strempty(t));
+
+ } else if (strstr(name, "USec")) {
+ char timespan[FORMAT_TIMESPAN_MAX];
+
+ (void) format_timespan(timespan, sizeof(timespan), u, 0);
+ bus_print_property_value(name, expected_value, value, timespan);
+
+ } else if (streq(name, "CoredumpFilter")) {
+ char buf[STRLEN("0xFFFFFFFF")];
+
+ xsprintf(buf, "0x%"PRIx64, u);
+ bus_print_property_value(name, expected_value, value, buf);
+
+ } else if (streq(name, "RestrictNamespaces")) {
+ _cleanup_free_ char *s = NULL;
+ const char *result;
+
+ if ((u & NAMESPACE_FLAGS_ALL) == 0)
+ result = "yes";
+ else if (FLAGS_SET(u, NAMESPACE_FLAGS_ALL))
+ result = "no";
+ else {
+ r = namespace_flags_to_string(u, &s);
+ if (r < 0)
+ return r;
+
+ result = strempty(s);
+ }
+
+ bus_print_property_value(name, expected_value, value, result);
+
+ } else if (streq(name, "MountFlags")) {
+ const char *result;
+
+ result = mount_propagation_flags_to_string(u);
+ if (!result)
+ return -EINVAL;
+
+ bus_print_property_value(name, expected_value, value, result);
+
+ } else if (STR_IN_SET(name, "CapabilityBoundingSet", "AmbientCapabilities")) {
+ _cleanup_free_ char *s = NULL;
+
+ r = capability_set_to_string_alloc(u, &s);
+ if (r < 0)
+ return r;
+
+ bus_print_property_value(name, expected_value, value, s);
+
+ } else if ((STR_IN_SET(name, "CPUWeight", "StartupCPUWeight", "IOWeight", "StartupIOWeight") && u == CGROUP_WEIGHT_INVALID) ||
+ (STR_IN_SET(name, "CPUShares", "StartupCPUShares") && u == CGROUP_CPU_SHARES_INVALID) ||
+ (STR_IN_SET(name, "BlockIOWeight", "StartupBlockIOWeight") && u == CGROUP_BLKIO_WEIGHT_INVALID) ||
+ (STR_IN_SET(name, "MemoryCurrent", "TasksCurrent") && u == (uint64_t) -1) ||
+ (endswith(name, "NSec") && u == (uint64_t) -1))
+
+ bus_print_property_value(name, expected_value, value, "[not set]");
+
+ else if ((STR_IN_SET(name, "DefaultMemoryLow", "DefaultMemoryMin", "MemoryLow", "MemoryHigh", "MemoryMax", "MemorySwapMax", "MemoryLimit") && u == CGROUP_LIMIT_MAX) ||
+ (STR_IN_SET(name, "TasksMax", "DefaultTasksMax") && u == (uint64_t) -1) ||
+ (startswith(name, "Limit") && u == (uint64_t) -1) ||
+ (startswith(name, "DefaultLimit") && u == (uint64_t) -1))
+
+ bus_print_property_value(name, expected_value, value, "infinity");
+ else if (STR_IN_SET(name, "IPIngressBytes", "IPIngressPackets", "IPEgressBytes", "IPEgressPackets") && u == (uint64_t) -1)
+ bus_print_property_value(name, expected_value, value, "[no data]");
+ else
+ bus_print_property_valuef(name, expected_value, value, "%"PRIu64, u);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_INT64: {
+ int64_t i;
+
+ r = sd_bus_message_read_basic(m, type, &i);
+ if (r < 0)
+ return r;
+
+ bus_print_property_valuef(name, expected_value, value, "%"PRIi64, i);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_UINT32: {
+ uint32_t u;
+
+ r = sd_bus_message_read_basic(m, type, &u);
+ if (r < 0)
+ return r;
+
+ if (strstr(name, "UMask") || strstr(name, "Mode"))
+ bus_print_property_valuef(name, expected_value, value, "%04o", u);
+
+ else if (streq(name, "UID")) {
+ if (u == UID_INVALID)
+ bus_print_property_value(name, expected_value, value, "[not set]");
+ else
+ bus_print_property_valuef(name, expected_value, value, "%"PRIu32, u);
+ } else if (streq(name, "GID")) {
+ if (u == GID_INVALID)
+ bus_print_property_value(name, expected_value, value, "[not set]");
+ else
+ bus_print_property_valuef(name, expected_value, value, "%"PRIu32, u);
+ } else
+ bus_print_property_valuef(name, expected_value, value, "%"PRIu32, u);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_INT32: {
+ int32_t i;
+
+ r = sd_bus_message_read_basic(m, type, &i);
+ if (r < 0)
+ return r;
+
+ bus_print_property_valuef(name, expected_value, value, "%"PRIi32, i);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_DOUBLE: {
+ double d;
+
+ r = sd_bus_message_read_basic(m, type, &d);
+ if (r < 0)
+ return r;
+
+ bus_print_property_valuef(name, expected_value, value, "%g", d);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_ARRAY:
+ if (streq(contents, "s")) {
+ bool first = true;
+ const char *str;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, contents);
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &str)) > 0) {
+ _cleanup_free_ char *e = NULL;
+
+ e = shell_maybe_quote(str, ESCAPE_BACKSLASH_ONELINE);
+ if (!e)
+ return -ENOMEM;
+
+ if (first) {
+ if (!value)
+ printf("%s=", name);
+ first = false;
+ } else
+ fputs(" ", stdout);
+
+ fputs(e, stdout);
+ }
+ if (r < 0)
+ return r;
+
+ if (first && all && !value)
+ printf("%s=", name);
+ if (!first || all)
+ puts("");
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return 1;
+
+ } else if (streq(contents, "y")) {
+ const uint8_t *u;
+ size_t n;
+
+ r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
+ if (r < 0)
+ return r;
+
+ if (all || n > 0) {
+ unsigned i;
+
+ if (!value)
+ printf("%s=", name);
+
+ for (i = 0; i < n; i++)
+ printf("%02x", u[i]);
+
+ puts("");
+ }
+
+ return 1;
+
+ } else if (streq(contents, "u")) {
+ uint32_t *u;
+ size_t n;
+
+ r = sd_bus_message_read_array(m, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
+ if (r < 0)
+ return r;
+
+ if (all || n > 0) {
+ unsigned i;
+
+ if (!value)
+ printf("%s=", name);
+
+ for (i = 0; i < n; i++)
+ printf("%08x", u[i]);
+
+ puts("");
+ }
+
+ return 1;
+ }
+
+ break;
+ }
+
+ return 0;
+}
+
+int bus_message_print_all_properties(
+ sd_bus_message *m,
+ bus_message_print_t func,
+ char **filter,
+ bool value,
+ bool all,
+ Set **found_properties) {
+
+ int r;
+
+ assert(m);
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
+ _cleanup_free_ char *name_with_equal = NULL;
+ const char *name, *contents, *expected_value = NULL;
+
+ r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &name);
+ if (r < 0)
+ return r;
+
+ if (found_properties) {
+ r = set_ensure_put(found_properties, &string_hash_ops, name);
+ if (r < 0)
+ return log_oom();
+ }
+
+ name_with_equal = strjoin(name, "=");
+ if (!name_with_equal)
+ return log_oom();
+
+ if (!filter || strv_find(filter, name) ||
+ (expected_value = strv_find_startswith(filter, name_with_equal))) {
+ r = sd_bus_message_peek_type(m, NULL, &contents);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
+ if (r < 0)
+ return r;
+
+ if (func)
+ r = func(name, expected_value, m, value, all);
+ if (!func || r == 0)
+ r = bus_print_property(name, expected_value, m, value, all);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ if (all && !expected_value)
+ printf("%s=[unprintable]\n", name);
+ /* skip what we didn't read */
+ r = sd_bus_message_skip(m, contents);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+ } else {
+ r = sd_bus_message_skip(m, "v");
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int bus_print_all_properties(
+ sd_bus *bus,
+ const char *dest,
+ const char *path,
+ bus_message_print_t func,
+ char **filter,
+ bool value,
+ bool all,
+ Set **found_properties) {
+
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(bus);
+ assert(path);
+
+ r = sd_bus_call_method(bus,
+ dest,
+ path,
+ "org.freedesktop.DBus.Properties",
+ "GetAll",
+ &error,
+ &reply,
+ "s", "");
+ if (r < 0)
+ return r;
+
+ return bus_message_print_all_properties(reply, func, filter, value, all, found_properties);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 22:44:40 +0000