X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fcondition.c;h=c20c0f01e1da6df5ae90ad3b0b6e6872afc1626c;hp=4aa5530c3645b8ba7ddc9f01789d7e73182da366;hb=c073a0c4a5ffbf6677dd6af02e7c7d59b2b901ab;hpb=80f53eb59516f87e26e3afa405c61b4eed9ffe30

diff --git a/src/core/condition.c b/src/core/condition.c
index 4aa5530c3..c20c0f01e 100644
--- a/src/core/condition.c
+++ b/src/core/condition.c
@@ -19,306 +19,10 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/capability.h>
-#include <sys/statvfs.h>
-#include <fnmatch.h>
-
-#ifdef HAVE_SELINUX
-#include <selinux/selinux.h>
-#endif
-
-#include <systemd/sd-id128.h>
-#include "util.h"
 #include "condition.h"
-#include "virt.h"
-#include "path-util.h"
-#include "fileio.h"
+#include "unit.h"
 
-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) {
-                c->parameter = strdup(parameter);
-                if (!c->parameter) {
-                        free(c);
-                        return NULL;
-                }
-        }
-
-        return c;
-}
-
-void condition_free(Condition *c) {
-        assert(c);
-
-        free(c->parameter);
-        free(c);
-}
-
-void condition_free_list(Condition *first) {
-        Condition *c, *n;
-
-        LIST_FOREACH_SAFE(conditions, c, n, first)
-                condition_free(c);
-}
-
-static bool test_kernel_command_line(const char *parameter) {
-        char *line, *w, *state, *word = NULL;
-        bool equal;
-        int r;
-        size_t l, pl;
-        bool found = false;
-
-        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;
-        }
-
-        equal = !!strchr(parameter, '=');
-        pl = strlen(parameter);
-
-        FOREACH_WORD_QUOTED(w, l, line, state) {
-
-                free(word);
-                word = strndup(w, l);
-                if (!word)
-                        break;
-
-                if (equal) {
-                        if (streq(word, parameter)) {
-                                found = true;
-                                break;
-                        }
-                } else {
-                        if (startswith(word, parameter) && (word[pl] == '=' || word[pl] == 0)) {
-                                found = true;
-                                break;
-                        }
-                }
-
-        }
-
-        free(word);
-        free(line);
-
-        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
-	if (streq(parameter, "apparmor"))
-		return access("/sys/kernel/security/apparmor/", F_OK) == 0;
-        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));
-}
-
-static bool test_host(const char *parameter) {
-        sd_id128_t x, y;
-        char *h;
-        int r;
-        bool b;
-
-        if (sd_id128_from_string(parameter, &x) >= 0) {
-
-                r = sd_id128_get_machine(&y);
-                if (r < 0)
-                        return false;
-
-                return sd_id128_equal(x, y);
-        }
-
-        h = gethostname_malloc();
-        if (!h)
-                return false;
-
-        b = fnmatch(parameter, h, FNM_CASEFOLD) == 0;
-        free(h);
-
-        return b;
-}
-
-static bool test_ac_power(const char *parameter) {
-        int r;
-
-        r = parse_boolean(parameter);
-        if (r < 0)
-                return true;
-
-        return (on_ac_power() != 0) == !!r;
-}
-
-bool condition_test(Condition *c) {
-        assert(c);
-
-        switch(c->type) {
-
-        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_PATH_IS_READ_WRITE:
-                return (path_is_read_only_fs(c->parameter) > 0) == c->negate;
-
-        case CONDITION_DIRECTORY_NOT_EMPTY: {
-                int k;
-
-                k = dir_is_empty(c->parameter);
-                return !(k == -ENOENT || k > 0) == !c->negate;
-        }
-
-        case CONDITION_FILE_NOT_EMPTY: {
-                struct stat st;
-
-                if (stat(c->parameter, &st) < 0)
-                        return c->negate;
-
-                return (S_ISREG(st.st_mode) && st.st_size > 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;
-
-        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_HOST:
-                return test_host(c->parameter) == !c->negate;
-
-        case CONDITION_AC_POWER:
-                return test_ac_power(c->parameter) == !c->negate;
-
-        case CONDITION_NULL:
-                return !c->negate;
-
-        default:
-                assert_not_reached("Invalid condition type.");
-        }
-}
-
-bool condition_test_list(Condition *first) {
+bool condition_test_list(const char *unit, Condition *first, const char *(*to_string)(ConditionType t)) {
         Condition *c;
         int triggered = -1;
 
@@ -330,58 +34,34 @@ bool condition_test_list(Condition *first) {
          * if any of the trigger conditions apply (unless there are
          * none) we return true */
         LIST_FOREACH(conditions, c, first) {
-                bool b;
-
-                b = condition_test(c);
+                int r;
 
-                if (!c->trigger && !b)
+                r = condition_test(c);
+                if (r < 0)
+                        log_warning_unit(unit,
+                                         "Couldn't determine result for %s=%s%s%s for %s, assuming failed: %s",
+                                         to_string(c->type),
+                                         c->trigger ? "|" : "",
+                                         c->negate ? "!" : "",
+                                         c->parameter,
+                                         unit,
+                                         strerror(-r));
+                else
+                        log_debug_unit(unit,
+                                       "%s=%s%s%s %s for %s.",
+                                       to_string(c->type),
+                                       c->trigger ? "|" : "",
+                                       c->negate ? "!" : "",
+                                       c->parameter,
+                                       condition_result_to_string(c->result),
+                                       unit);
+
+                if (!c->trigger && r <= 0)
                         return false;
 
                 if (c->trigger && triggered <= 0)
-                        triggered = b;
+                        triggered = r > 0;
         }
 
         return triggered != 0;
 }
-
-void condition_dump(Condition *c, FILE *f, const char *prefix) {
-        assert(c);
-        assert(f);
-
-        if (!prefix)
-                prefix = "";
-
-        fprintf(f,
-                "%s\t%s: %s%s%s\n",
-                prefix,
-                condition_type_to_string(c->type),
-                c->trigger ? "|" : "",
-                c->negate ? "!" : "",
-                c->parameter);
-}
-
-void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
-        Condition *c;
-
-        LIST_FOREACH(conditions, c, first)
-                condition_dump(c, f, prefix);
-}
-
-static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
-        [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_PATH_IS_READ_WRITE] = "ConditionPathIsReadWrite",
-        [CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
-        [CONDITION_FILE_NOT_EMPTY] = "ConditionFileNotEmpty",
-        [CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
-        [CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
-        [CONDITION_SECURITY] = "ConditionSecurity",
-        [CONDITION_HOST] = "ConditionHost",
-        [CONDITION_AC_POWER] = "ConditionACPower",
-        [CONDITION_NULL] = "ConditionNull"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);