mirror of
https://github.com/systemd/systemd.git
synced 2024-12-17 22:23:39 +08:00
condition: split out most of condition handling into libsystemd-shard
The parts that require linknig to libcap, libselinux and friends stays in libsystemd-core.
This commit is contained in:
parent
afc50ea84e
commit
b77c08e06b
@ -766,7 +766,9 @@ libsystemd_shared_la_SOURCES = \
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src/shared/audit.c \
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src/shared/audit.h \
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src/shared/xml.c \
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src/shared/xml.h
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src/shared/xml.h \
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src/shared/condition-util.c \
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src/shared/condition-util.h
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nodist_libsystemd_shared_la_SOURCES = \
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src/shared/errno-from-name.h \
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@ -39,126 +39,6 @@
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#include "ima-util.h"
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#include "selinux-util.h"
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Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
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Condition *c;
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assert(type < _CONDITION_TYPE_MAX);
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c = new0(Condition, 1);
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if (!c)
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return NULL;
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c->type = type;
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c->trigger = trigger;
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c->negate = negate;
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if (parameter) {
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c->parameter = strdup(parameter);
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if (!c->parameter) {
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free(c);
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return NULL;
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}
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}
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return c;
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}
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void condition_free(Condition *c) {
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assert(c);
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free(c->parameter);
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free(c);
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}
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void condition_free_list(Condition *first) {
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Condition *c, *n;
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LIST_FOREACH_SAFE(conditions, c, n, first)
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condition_free(c);
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}
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static bool condition_test_kernel_command_line(Condition *c) {
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char *line, *w, *state, *word = NULL;
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bool equal;
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int r;
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size_t l, pl;
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bool found = false;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_KERNEL_COMMAND_LINE);
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r = proc_cmdline(&line);
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if (r < 0)
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log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
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if (r <= 0)
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return c->negate;
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equal = !!strchr(c->parameter, '=');
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pl = strlen(c->parameter);
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FOREACH_WORD_QUOTED(w, l, line, state) {
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free(word);
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word = strndup(w, l);
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if (!word)
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break;
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if (equal) {
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if (streq(word, c->parameter)) {
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found = true;
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break;
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}
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} else {
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if (startswith(word, c->parameter) && (word[pl] == '=' || word[pl] == 0)) {
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found = true;
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break;
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}
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}
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}
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free(word);
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free(line);
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return found == !c->negate;
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}
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static bool condition_test_virtualization(Condition *c) {
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int b;
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Virtualization v;
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const char *id;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_VIRTUALIZATION);
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v = detect_virtualization(&id);
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if (v < 0) {
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log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
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return c->negate;
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}
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/* First, compare with yes/no */
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b = parse_boolean(c->parameter);
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if (v > 0 && b > 0)
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return !c->negate;
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if (v == 0 && b == 0)
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return !c->negate;
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/* Then, compare categorization */
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if (v == VIRTUALIZATION_VM && streq(c->parameter, "vm"))
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return !c->negate;
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if (v == VIRTUALIZATION_CONTAINER && streq(c->parameter, "container"))
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return !c->negate;
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/* Finally compare id */
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return (v > 0 && streq(c->parameter, id)) == !c->negate;
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}
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static bool condition_test_security(Condition *c) {
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assert(c);
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assert(c->parameter);
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@ -211,49 +91,6 @@ static bool condition_test_capability(Condition *c) {
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return !!(capabilities & (1ULL << value)) == !c->negate;
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}
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static bool condition_test_host(Condition *c) {
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sd_id128_t x, y;
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char *h;
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int r;
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bool b;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_HOST);
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if (sd_id128_from_string(c->parameter, &x) >= 0) {
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r = sd_id128_get_machine(&y);
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if (r < 0)
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return c->negate;
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return sd_id128_equal(x, y);
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}
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h = gethostname_malloc();
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if (!h)
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return c->negate;
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b = fnmatch(c->parameter, h, FNM_CASEFOLD) == 0;
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free(h);
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return b == !c->negate;
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}
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static bool condition_test_ac_power(Condition *c) {
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int r;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_AC_POWER);
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r = parse_boolean(c->parameter);
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if (r < 0)
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return !c->negate;
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return ((on_ac_power() != 0) == !!r) == !c->negate;
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}
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static bool condition_test(Condition *c) {
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assert(c);
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@ -373,48 +210,3 @@ bool condition_test_list(const char *unit, Condition *first) {
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return triggered != 0;
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}
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void condition_dump(Condition *c, FILE *f, const char *prefix) {
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assert(c);
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assert(f);
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if (!prefix)
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prefix = "";
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fprintf(f,
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"%s\t%s: %s%s%s %s\n",
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prefix,
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condition_type_to_string(c->type),
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c->trigger ? "|" : "",
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c->negate ? "!" : "",
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c->parameter,
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c->state < 0 ? "failed" : c->state > 0 ? "succeeded" : "untested");
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}
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void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
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Condition *c;
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LIST_FOREACH(conditions, c, first)
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condition_dump(c, f, prefix);
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}
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static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
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[CONDITION_PATH_EXISTS] = "ConditionPathExists",
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[CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
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[CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
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[CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
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[CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
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[CONDITION_PATH_IS_READ_WRITE] = "ConditionPathIsReadWrite",
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[CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
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[CONDITION_FILE_NOT_EMPTY] = "ConditionFileNotEmpty",
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[CONDITION_FILE_IS_EXECUTABLE] = "ConditionFileIsExecutable",
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[CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
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[CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
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[CONDITION_SECURITY] = "ConditionSecurity",
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[CONDITION_CAPABILITY] = "ConditionCapability",
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[CONDITION_HOST] = "ConditionHost",
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[CONDITION_AC_POWER] = "ConditionACPower",
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[CONDITION_NULL] = "ConditionNull"
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};
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DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
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@ -21,52 +21,6 @@
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include "list.h"
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typedef enum ConditionType {
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CONDITION_PATH_EXISTS,
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CONDITION_PATH_EXISTS_GLOB,
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CONDITION_PATH_IS_DIRECTORY,
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CONDITION_PATH_IS_SYMBOLIC_LINK,
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CONDITION_PATH_IS_MOUNT_POINT,
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CONDITION_PATH_IS_READ_WRITE,
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CONDITION_DIRECTORY_NOT_EMPTY,
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CONDITION_FILE_NOT_EMPTY,
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CONDITION_FILE_IS_EXECUTABLE,
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CONDITION_KERNEL_COMMAND_LINE,
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CONDITION_VIRTUALIZATION,
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CONDITION_SECURITY,
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CONDITION_CAPABILITY,
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CONDITION_HOST,
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CONDITION_AC_POWER,
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CONDITION_NULL,
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_CONDITION_TYPE_MAX,
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_CONDITION_TYPE_INVALID = -1
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} ConditionType;
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typedef struct Condition {
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ConditionType type;
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bool trigger:1;
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bool negate:1;
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char *parameter;
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int state;
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LIST_FIELDS(struct Condition, conditions);
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} Condition;
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Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate);
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void condition_free(Condition *c);
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void condition_free_list(Condition *c);
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#include "condition-util.h"
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bool condition_test_list(const char *unit, Condition *c);
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void condition_dump(Condition *c, FILE *f, const char *prefix);
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void condition_dump_list(Condition *c, FILE *f, const char *prefix);
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const char* condition_type_to_string(ConditionType t) _const_;
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int condition_type_from_string(const char *s) _pure_;
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243
src/shared/condition-util.c
Normal file
243
src/shared/condition-util.c
Normal file
@ -0,0 +1,243 @@
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/statvfs.h>
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#include <fnmatch.h>
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#include <systemd/sd-id128.h>
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#include "util.h"
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#include "condition-util.h"
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#include "virt.h"
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#include "path-util.h"
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#include "fileio.h"
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#include "unit.h"
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Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
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Condition *c;
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assert(type < _CONDITION_TYPE_MAX);
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c = new0(Condition, 1);
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if (!c)
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return NULL;
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c->type = type;
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c->trigger = trigger;
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c->negate = negate;
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if (parameter) {
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c->parameter = strdup(parameter);
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if (!c->parameter) {
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free(c);
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return NULL;
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}
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}
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return c;
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}
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void condition_free(Condition *c) {
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assert(c);
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free(c->parameter);
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free(c);
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}
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void condition_free_list(Condition *first) {
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Condition *c, *n;
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LIST_FOREACH_SAFE(conditions, c, n, first)
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condition_free(c);
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}
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bool condition_test_kernel_command_line(Condition *c) {
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char *line, *w, *state, *word = NULL;
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bool equal;
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int r;
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size_t l, pl;
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bool found = false;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_KERNEL_COMMAND_LINE);
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r = proc_cmdline(&line);
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if (r < 0)
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log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
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if (r <= 0)
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return c->negate;
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equal = !!strchr(c->parameter, '=');
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pl = strlen(c->parameter);
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FOREACH_WORD_QUOTED(w, l, line, state) {
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free(word);
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word = strndup(w, l);
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if (!word)
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break;
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if (equal) {
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if (streq(word, c->parameter)) {
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found = true;
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break;
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}
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} else {
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if (startswith(word, c->parameter) && (word[pl] == '=' || word[pl] == 0)) {
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found = true;
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break;
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}
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}
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}
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free(word);
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free(line);
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return found == !c->negate;
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}
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bool condition_test_virtualization(Condition *c) {
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int b;
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Virtualization v;
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const char *id;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_VIRTUALIZATION);
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v = detect_virtualization(&id);
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if (v < 0) {
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log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
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return c->negate;
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}
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/* First, compare with yes/no */
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b = parse_boolean(c->parameter);
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if (v > 0 && b > 0)
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return !c->negate;
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if (v == 0 && b == 0)
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return !c->negate;
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/* Then, compare categorization */
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if (v == VIRTUALIZATION_VM && streq(c->parameter, "vm"))
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return !c->negate;
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if (v == VIRTUALIZATION_CONTAINER && streq(c->parameter, "container"))
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return !c->negate;
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/* Finally compare id */
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return (v > 0 && streq(c->parameter, id)) == !c->negate;
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}
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bool condition_test_host(Condition *c) {
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sd_id128_t x, y;
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char *h;
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int r;
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bool b;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_HOST);
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if (sd_id128_from_string(c->parameter, &x) >= 0) {
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r = sd_id128_get_machine(&y);
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if (r < 0)
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return c->negate;
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return sd_id128_equal(x, y);
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}
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h = gethostname_malloc();
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if (!h)
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return c->negate;
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b = fnmatch(c->parameter, h, FNM_CASEFOLD) == 0;
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free(h);
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return b == !c->negate;
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}
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bool condition_test_ac_power(Condition *c) {
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int r;
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assert(c);
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assert(c->parameter);
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assert(c->type == CONDITION_AC_POWER);
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r = parse_boolean(c->parameter);
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if (r < 0)
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return !c->negate;
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return ((on_ac_power() != 0) == !!r) == !c->negate;
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}
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void condition_dump(Condition *c, FILE *f, const char *prefix) {
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assert(c);
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assert(f);
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if (!prefix)
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prefix = "";
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fprintf(f,
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"%s\t%s: %s%s%s %s\n",
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prefix,
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condition_type_to_string(c->type),
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c->trigger ? "|" : "",
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c->negate ? "!" : "",
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c->parameter,
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c->state < 0 ? "failed" : c->state > 0 ? "succeeded" : "untested");
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}
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void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
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Condition *c;
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LIST_FOREACH(conditions, c, first)
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condition_dump(c, f, prefix);
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}
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static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
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[CONDITION_PATH_EXISTS] = "ConditionPathExists",
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[CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
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[CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
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[CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
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[CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
|
||||
[CONDITION_PATH_IS_READ_WRITE] = "ConditionPathIsReadWrite",
|
||||
[CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
|
||||
[CONDITION_FILE_NOT_EMPTY] = "ConditionFileNotEmpty",
|
||||
[CONDITION_FILE_IS_EXECUTABLE] = "ConditionFileIsExecutable",
|
||||
[CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
|
||||
[CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
|
||||
[CONDITION_SECURITY] = "ConditionSecurity",
|
||||
[CONDITION_CAPABILITY] = "ConditionCapability",
|
||||
[CONDITION_HOST] = "ConditionHost",
|
||||
[CONDITION_AC_POWER] = "ConditionACPower",
|
||||
[CONDITION_NULL] = "ConditionNull"
|
||||
};
|
||||
|
||||
DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
|
77
src/shared/condition-util.h
Normal file
77
src/shared/condition-util.h
Normal file
@ -0,0 +1,77 @@
|
||||
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||||
|
||||
#pragma once
|
||||
|
||||
/***
|
||||
This file is part of systemd.
|
||||
|
||||
Copyright 2010 Lennart Poettering
|
||||
|
||||
systemd is free software; you can redistribute it and/or modify it
|
||||
under the terms of the GNU Lesser General Public License as published by
|
||||
the Free Software Foundation; either version 2.1 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
systemd is distributed in the hope that it will be useful, but
|
||||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||||
***/
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "list.h"
|
||||
#include "macro.h"
|
||||
|
||||
typedef enum ConditionType {
|
||||
CONDITION_PATH_EXISTS,
|
||||
CONDITION_PATH_EXISTS_GLOB,
|
||||
CONDITION_PATH_IS_DIRECTORY,
|
||||
CONDITION_PATH_IS_SYMBOLIC_LINK,
|
||||
CONDITION_PATH_IS_MOUNT_POINT,
|
||||
CONDITION_PATH_IS_READ_WRITE,
|
||||
CONDITION_DIRECTORY_NOT_EMPTY,
|
||||
CONDITION_FILE_NOT_EMPTY,
|
||||
CONDITION_FILE_IS_EXECUTABLE,
|
||||
CONDITION_KERNEL_COMMAND_LINE,
|
||||
CONDITION_VIRTUALIZATION,
|
||||
CONDITION_SECURITY,
|
||||
CONDITION_CAPABILITY,
|
||||
CONDITION_HOST,
|
||||
CONDITION_AC_POWER,
|
||||
CONDITION_NULL,
|
||||
_CONDITION_TYPE_MAX,
|
||||
_CONDITION_TYPE_INVALID = -1
|
||||
} ConditionType;
|
||||
|
||||
typedef struct Condition {
|
||||
ConditionType type;
|
||||
|
||||
bool trigger:1;
|
||||
bool negate:1;
|
||||
|
||||
char *parameter;
|
||||
|
||||
int state;
|
||||
|
||||
LIST_FIELDS(struct Condition, conditions);
|
||||
} Condition;
|
||||
|
||||
Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate);
|
||||
void condition_free(Condition *c);
|
||||
void condition_free_list(Condition *c);
|
||||
|
||||
bool condition_test_kernel_command_line(Condition *c);
|
||||
bool condition_test_virtualization(Condition *c);
|
||||
bool condition_test_host(Condition *c);
|
||||
bool condition_test_ac_power(Condition *c);
|
||||
|
||||
void condition_dump(Condition *c, FILE *f, const char *prefix);
|
||||
void condition_dump_list(Condition *c, FILE *f, const char *prefix);
|
||||
|
||||
const char* condition_type_to_string(ConditionType t) _const_;
|
||||
int condition_type_from_string(const char *s) _pure_;
|
Loading…
Reference in New Issue
Block a user