#include <sys/statvfs.h>
#include <fnmatch.h>
-#include <systemd/sd-id128.h>
+#include "sd-id128.h"
#include "util.h"
#include "condition-util.h"
#include "virt.h"
#include "fileio.h"
#include "unit.h"
#include "architecture.h"
+#include "virt.h"
+#include "smack-util.h"
+#include "apparmor-util.h"
+#include "ima-util.h"
+#include "selinux-util.h"
+#include "audit.h"
Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
Condition *c;
+ int r;
assert(type < _CONDITION_TYPE_MAX);
c->trigger = trigger;
c->negate = negate;
- if (parameter) {
- c->parameter = strdup(parameter);
- if (!c->parameter) {
- free(c);
- return NULL;
- }
+ r = free_and_strdup(&c->parameter, parameter);
+ if (r < 0) {
+ free(c);
+ return NULL;
}
return c;
condition_free(c);
}
-bool condition_test_kernel_command_line(Condition *c) {
- char *line, *w, *state, *word = NULL;
+int condition_test_kernel_command_line(Condition *c) {
+ _cleanup_free_ char *line = NULL;
+ const char *p;
bool equal;
int r;
- size_t l, pl;
- bool found = false;
assert(c);
assert(c->parameter);
r = proc_cmdline(&line);
if (r < 0)
- log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
- if (r <= 0)
+ return r;
+ if (r == 0)
return c->negate;
equal = !!strchr(c->parameter, '=');
- pl = strlen(c->parameter);
+ p = line;
- FOREACH_WORD_QUOTED(w, l, line, state) {
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ bool found;
- free(word);
- word = strndup(w, l);
- if (!word)
- break;
+ r = unquote_first_word(&p, &word);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return c->negate;
+
+ if (equal)
+ found = streq(word, c->parameter);
+ else {
+ const char *f;
- if (equal) {
- if (streq(word, c->parameter)) {
- found = true;
- break;
- }
- } else {
- if (startswith(word, c->parameter) && (word[pl] == '=' || word[pl] == 0)) {
- found = true;
- break;
- }
+ f = startswith(word, c->parameter);
+ found = f && (*f == '=' || *f == 0);
}
+ if (found)
+ return !c->negate;
}
- free(word);
- free(line);
-
- return found == !c->negate;
+ return c->negate;
}
-bool condition_test_virtualization(Condition *c) {
+int condition_test_virtualization(Condition *c) {
int b, v;
const char *id;
assert(c->type == CONDITION_VIRTUALIZATION);
v = detect_virtualization(&id);
- if (v < 0) {
- log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
- return c->negate;
- }
+ if (v < 0)
+ return v;
/* First, compare with yes/no */
b = parse_boolean(c->parameter);
return (v > 0 && streq(c->parameter, id)) == !c->negate;
}
-bool condition_test_architecture(Condition *c) {
- Architecture a, b;
+int condition_test_architecture(Condition *c) {
+ int a, b;
assert(c);
assert(c->parameter);
a = uname_architecture();
if (a < 0)
- return c->negate;
+ return a;
if (streq(c->parameter, "native"))
b = native_architecture();
else
b = architecture_from_string(c->parameter);
-
if (b < 0)
- return c->negate;
+ return b;
return (a == b) == !c->negate;
}
-bool condition_test_host(Condition *c) {
+int condition_test_host(Condition *c) {
_cleanup_free_ char *h = NULL;
sd_id128_t x, y;
int r;
r = sd_id128_get_machine(&y);
if (r < 0)
- return c->negate;
+ return r;
return sd_id128_equal(x, y) == !c->negate;
}
h = gethostname_malloc();
if (!h)
- return c->negate;
+ return -ENOMEM;
return (fnmatch(c->parameter, h, FNM_CASEFOLD) == 0) == !c->negate;
}
-bool condition_test_ac_power(Condition *c) {
+int condition_test_ac_power(Condition *c) {
int r;
assert(c);
r = parse_boolean(c->parameter);
if (r < 0)
- return !c->negate;
+ return r;
return ((on_ac_power() != 0) == !!r) == !c->negate;
}
+static int condition_test_security(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_SECURITY);
+
+ if (streq(c->parameter, "selinux"))
+ return mac_selinux_use() == !c->negate;
+ if (streq(c->parameter, "smack"))
+ return mac_smack_use() == !c->negate;
+ if (streq(c->parameter, "apparmor"))
+ return mac_apparmor_use() == !c->negate;
+ if (streq(c->parameter, "audit"))
+ return use_audit() == !c->negate;
+ if (streq(c->parameter, "ima"))
+ return use_ima() == !c->negate;
+
+ return c->negate;
+}
+
+static int condition_test_capability(Condition *c) {
+ _cleanup_fclose_ FILE *f = NULL;
+ cap_value_t value;
+ char line[LINE_MAX];
+ unsigned long long capabilities = -1;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_CAPABILITY);
+
+ /* If it's an invalid capability, we don't have it */
+
+ if (cap_from_name(c->parameter, &value) < 0)
+ return -EINVAL;
+
+ /* If it's a valid capability we default to assume
+ * that we have it */
+
+ f = fopen("/proc/self/status", "re");
+ if (!f)
+ return -errno;
+
+ while (fgets(line, sizeof(line), f)) {
+ truncate_nl(line);
+
+ if (startswith(line, "CapBnd:")) {
+ (void) sscanf(line+7, "%llx", &capabilities);
+ break;
+ }
+ }
+
+ return !!(capabilities & (1ULL << value)) == !c->negate;
+}
+
+static int condition_test_needs_update(Condition *c) {
+ const char *p;
+ struct stat usr, other;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_NEEDS_UPDATE);
+
+ /* If the file system is read-only we shouldn't suggest an update */
+ if (path_is_read_only_fs(c->parameter) > 0)
+ return c->negate;
+
+ /* Any other failure means we should allow the condition to be true,
+ * so that we rather invoke too many update tools then too
+ * few. */
+
+ if (!path_is_absolute(c->parameter))
+ return !c->negate;
+
+ p = strappenda(c->parameter, "/.updated");
+ if (lstat(p, &other) < 0)
+ return !c->negate;
+
+ if (lstat("/usr/", &usr) < 0)
+ return !c->negate;
+
+ return (usr.st_mtim.tv_sec > other.st_mtim.tv_sec ||
+ (usr.st_mtim.tv_sec == other.st_mtim.tv_sec && usr.st_mtim.tv_nsec > other.st_mtim.tv_nsec)) == !c->negate;
+}
+
+static int condition_test_first_boot(Condition *c) {
+ int r;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_FIRST_BOOT);
+
+ r = parse_boolean(c->parameter);
+ if (r < 0)
+ return r;
+
+ return ((access("/run/systemd/first-boot", F_OK) >= 0) == !!r) == !c->negate;
+}
+
+static int condition_test_path_exists(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_EXISTS);
+
+ return (access(c->parameter, F_OK) >= 0) == !c->negate;
+}
+
+static int condition_test_path_exists_glob(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_EXISTS_GLOB);
+
+ return (glob_exists(c->parameter) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_directory(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_DIRECTORY);
+
+ return (is_dir(c->parameter, true) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_symbolic_link(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_SYMBOLIC_LINK);
+
+ return (is_symlink(c->parameter) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_mount_point(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_MOUNT_POINT);
+
+ return (path_is_mount_point(c->parameter, true) > 0) == !c->negate;
+}
+
+static int condition_test_path_is_read_write(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_PATH_IS_READ_WRITE);
+
+ return (path_is_read_only_fs(c->parameter) > 0) == c->negate;
+}
+
+static int condition_test_directory_not_empty(Condition *c) {
+ int r;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_DIRECTORY_NOT_EMPTY);
+
+ r = dir_is_empty(c->parameter);
+ return !(r == -ENOENT || r > 0) == !c->negate;
+}
+
+static int condition_test_file_not_empty(Condition *c) {
+ struct stat st;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_FILE_NOT_EMPTY);
+
+ return (stat(c->parameter, &st) >= 0 &&
+ S_ISREG(st.st_mode) &&
+ st.st_size > 0) == !c->negate;
+}
+
+static int condition_test_file_is_executable(Condition *c) {
+ struct stat st;
+
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_FILE_IS_EXECUTABLE);
+
+ return (stat(c->parameter, &st) >= 0 &&
+ S_ISREG(st.st_mode) &&
+ (st.st_mode & 0111)) == !c->negate;
+}
+
+static int condition_test_null(Condition *c) {
+ assert(c);
+ assert(c->parameter);
+ assert(c->type == CONDITION_NULL);
+
+ /* Note that during parsing we already evaluate the string and
+ * store it in c->negate */
+ return !c->negate;
+}
+
+int condition_test(Condition *c) {
+
+ static int (*const condition_tests[_CONDITION_TYPE_MAX])(Condition *c) = {
+ [CONDITION_PATH_EXISTS] = condition_test_path_exists,
+ [CONDITION_PATH_EXISTS_GLOB] = condition_test_path_exists_glob,
+ [CONDITION_PATH_IS_DIRECTORY] = condition_test_path_is_directory,
+ [CONDITION_PATH_IS_SYMBOLIC_LINK] = condition_test_path_is_symbolic_link,
+ [CONDITION_PATH_IS_MOUNT_POINT] = condition_test_path_is_mount_point,
+ [CONDITION_PATH_IS_READ_WRITE] = condition_test_path_is_read_write,
+ [CONDITION_DIRECTORY_NOT_EMPTY] = condition_test_directory_not_empty,
+ [CONDITION_FILE_NOT_EMPTY] = condition_test_file_not_empty,
+ [CONDITION_FILE_IS_EXECUTABLE] = condition_test_file_is_executable,
+ [CONDITION_KERNEL_COMMAND_LINE] = condition_test_kernel_command_line,
+ [CONDITION_VIRTUALIZATION] = condition_test_virtualization,
+ [CONDITION_SECURITY] = condition_test_security,
+ [CONDITION_CAPABILITY] = condition_test_capability,
+ [CONDITION_HOST] = condition_test_host,
+ [CONDITION_AC_POWER] = condition_test_ac_power,
+ [CONDITION_ARCHITECTURE] = condition_test_architecture,
+ [CONDITION_NEEDS_UPDATE] = condition_test_needs_update,
+ [CONDITION_FIRST_BOOT] = condition_test_first_boot,
+ [CONDITION_NULL] = condition_test_null,
+ };
+
+ assert(c);
+ assert(c->type >= 0);
+ assert(c->type < _CONDITION_TYPE_MAX);
+
+ return condition_tests[c->type](c);
+}
+
void condition_dump(Condition *c, FILE *f, const char *prefix) {
assert(c);
assert(f);
c->trigger ? "|" : "",
c->negate ? "!" : "",
c->parameter,
- c->state < 0 ? "failed" : c->state > 0 ? "succeeded" : "untested");
+ CONDITION_STATE_IS_FAILED(c->state) ? "failed" : CONDITION_STATE_IS_SUCCEEDED(c->state) ? "succeeded" : "untested");
}
void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
[CONDITION_AC_POWER] = "ConditionACPower",
[CONDITION_ARCHITECTURE] = "ConditionArchitecture",
[CONDITION_NEEDS_UPDATE] = "ConditionNeedsUpdate",
+ [CONDITION_FIRST_BOOT] = "ConditionFirstBoot",
[CONDITION_NULL] = "ConditionNull"
};
~ianmdlvl / elogind.git / blobdiff