#include <errno.h>
#include <string.h>
#include <unistd.h>
+#include <sys/capability.h>
+
+#ifdef HAVE_SELINUX
+#include <selinux/selinux.h>
+#endif
#include "util.h"
#include "condition.h"
+#include "virt.h"
-Condition* condition_new(ConditionType type, const char *parameter, bool negate) {
+Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
Condition *c;
+ assert(type < _CONDITION_TYPE_MAX);
+
c = new0(Condition, 1);
+ if (!c)
+ return NULL;
+
c->type = type;
+ c->trigger = trigger;
c->negate = negate;
- if (parameter)
- if (!(c->parameter = strdup(parameter))) {
+ if (parameter) {
+ c->parameter = strdup(parameter);
+ if (!c->parameter) {
free(c);
return NULL;
}
+ }
return c;
}
size_t l, pl;
bool found = false;
- if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
+ assert(parameter);
+
+ if (detect_container(NULL) > 0)
+ return false;
+
+ r = read_one_line_file("/proc/cmdline", &line);
+ if (r < 0) {
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
return false;
}
FOREACH_WORD_QUOTED(w, l, line, state) {
free(word);
- if (!(word = strndup(w, l)))
+ word = strndup(w, l);
+ if (!word)
break;
if (equal) {
return found;
}
+static bool test_virtualization(const char *parameter) {
+ int b;
+ Virtualization v;
+ const char *id;
+
+ assert(parameter);
+
+ v = detect_virtualization(&id);
+ if (v < 0) {
+ log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
+ return false;
+ }
+
+ /* First, compare with yes/no */
+ b = parse_boolean(parameter);
+
+ if (v > 0 && b > 0)
+ return true;
+
+ if (v == 0 && b == 0)
+ return true;
+
+ /* Then, compare categorization */
+ if (v == VIRTUALIZATION_VM && streq(parameter, "vm"))
+ return true;
+
+ if (v == VIRTUALIZATION_CONTAINER && streq(parameter, "container"))
+ return true;
+
+ /* Finally compare id */
+ return v > 0 && streq(parameter, id);
+}
+
+static bool test_security(const char *parameter) {
+#ifdef HAVE_SELINUX
+ if (streq(parameter, "selinux"))
+ return is_selinux_enabled() > 0;
+#endif
+ return false;
+}
+
+static bool test_capability(const char *parameter) {
+ cap_value_t value;
+ FILE *f;
+ char line[LINE_MAX];
+ unsigned long long capabilities = (unsigned long long) -1;
+
+ /* If it's an invalid capability, we don't have it */
+
+ if (cap_from_name(parameter, &value) < 0)
+ return false;
+
+ /* If it's a valid capability we default to assume
+ * that we have it */
+
+ f = fopen("/proc/self/status", "re");
+ if (!f)
+ return true;
+
+ while (fgets(line, sizeof(line), f)) {
+ truncate_nl(line);
+
+ if (startswith(line, "CapBnd:")) {
+ (void) sscanf(line+7, "%llx", &capabilities);
+ break;
+ }
+ }
+
+ fclose(f);
+
+ return !!(capabilities & (1ULL << value));
+}
+
bool condition_test(Condition *c) {
assert(c);
case CONDITION_PATH_EXISTS:
return (access(c->parameter, F_OK) >= 0) == !c->negate;
+ case CONDITION_PATH_EXISTS_GLOB:
+ return (glob_exists(c->parameter) > 0) == !c->negate;
+
+ case CONDITION_PATH_IS_DIRECTORY: {
+ struct stat st;
+
+ if (stat(c->parameter, &st) < 0)
+ return c->negate;
+ return S_ISDIR(st.st_mode) == !c->negate;
+ }
+
+ case CONDITION_PATH_IS_SYMBOLIC_LINK: {
+ struct stat st;
+
+ if (lstat(c->parameter, &st) < 0)
+ return c->negate;
+ return S_ISLNK(st.st_mode) == !c->negate;
+ }
+
+ case CONDITION_PATH_IS_MOUNT_POINT:
+ return (path_is_mount_point(c->parameter, true) > 0) == !c->negate;
+
case CONDITION_DIRECTORY_NOT_EMPTY: {
int k;
return !(k == -ENOENT || k > 0) == !c->negate;
}
+ case CONDITION_FILE_IS_EXECUTABLE: {
+ struct stat st;
+
+ if (stat(c->parameter, &st) < 0)
+ return c->negate;
+
+ return (S_ISREG(st.st_mode) && (st.st_mode & 0111)) == !c->negate;
+ }
+
case CONDITION_KERNEL_COMMAND_LINE:
- return !!test_kernel_command_line(c->parameter) == !c->negate;
+ return test_kernel_command_line(c->parameter) == !c->negate;
+
+ case CONDITION_VIRTUALIZATION:
+ return test_virtualization(c->parameter) == !c->negate;
+
+ case CONDITION_SECURITY:
+ return test_security(c->parameter) == !c->negate;
+
+ case CONDITION_CAPABILITY:
+ return test_capability(c->parameter) == !c->negate;
case CONDITION_NULL:
return !c->negate;
bool condition_test_list(Condition *first) {
Condition *c;
+ int triggered = -1;
/* If the condition list is empty, then it is true */
if (!first)
return true;
- /* Otherwise, if any of the conditions apply we return true */
- LIST_FOREACH(conditions, c, first)
- if (condition_test(c))
- return true;
+ /* Otherwise, if all of the non-trigger conditions apply and
+ * if any of the trigger conditions apply (unless there are
+ * none) we return true */
+ LIST_FOREACH(conditions, c, first) {
+ bool b;
- return false;
+ b = condition_test(c);
+
+ if (!c->trigger && !b)
+ return false;
+
+ if (c->trigger && triggered <= 0)
+ triggered = b;
+ }
+
+ return triggered != 0;
}
void condition_dump(Condition *c, FILE *f, const char *prefix) {
prefix = "";
fprintf(f,
- "%s%s: %s%s\n",
+ "%s\t%s: %s%s%s\n",
prefix,
condition_type_to_string(c->type),
+ c->trigger ? "|" : "",
c->negate ? "!" : "",
c->parameter);
}
}
static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
- [CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
[CONDITION_PATH_EXISTS] = "ConditionPathExists",
+ [CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
+ [CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
+ [CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
+ [CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
+ [CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
+ [CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
+ [CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
+ [CONDITION_SECURITY] = "ConditionSecurity",
[CONDITION_NULL] = "ConditionNull"
};
~ianmdlvl / elogind.git / blobdiff