X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fcore%2Fcondition.c;h=35de996f8880e9d9225e47afe6dfef5203175d99;hb=afc50ea84e40d6a3f27ad5bfb5161e2d9b431275;hp=5dad5248bbac8bbcb2068493e8d6b4263d16725d;hpb=5430f7f2bc7330f3088b894166bf3524a067e3d8;p=elogind.git

diff --git a/src/core/condition.c b/src/core/condition.c
index 5dad5248b..35de996f8 100644
--- a/src/core/condition.c
+++ b/src/core/condition.c
@@ -24,14 +24,20 @@
 #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"
+#include "smack-util.h"
+#include "apparmor-util.h"
+#include "ima-util.h"
+#include "selinux-util.h"
 
 Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
         Condition *c;
@@ -71,26 +77,25 @@ void condition_free_list(Condition *first) {
                 condition_free(c);
 }
 
-static bool test_kernel_command_line(const char *parameter) {
+static bool condition_test_kernel_command_line(Condition *c) {
         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;
+        assert(c);
+        assert(c->parameter);
+        assert(c->type == CONDITION_KERNEL_COMMAND_LINE);
 
-        r = read_one_line_file("/proc/cmdline", &line);
-        if (r < 0) {
+        r = proc_cmdline(&line);
+        if (r < 0)
                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
-                return false;
-        }
+        if (r <= 0)
+                return c->negate;
 
-        equal = !!strchr(parameter, '=');
-        pl = strlen(parameter);
+        equal = !!strchr(c->parameter, '=');
+        pl = strlen(c->parameter);
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
 
@@ -100,12 +105,12 @@ static bool test_kernel_command_line(const char *parameter) {
                         break;
 
                 if (equal) {
-                        if (streq(word, parameter)) {
+                        if (streq(word, c->parameter)) {
                                 found = true;
                                 break;
                         }
                 } else {
-                        if (startswith(word, parameter) && (word[pl] == '=' || word[pl] == 0)) {
+                        if (startswith(word, c->parameter) && (word[pl] == '=' || word[pl] == 0)) {
                                 found = true;
                                 break;
                         }
@@ -116,67 +121,81 @@ static bool test_kernel_command_line(const char *parameter) {
         free(word);
         free(line);
 
-        return found;
+        return found == !c->negate;
 }
 
-static bool test_virtualization(const char *parameter) {
+static bool condition_test_virtualization(Condition *c) {
         int b;
         Virtualization v;
         const char *id;
 
-        assert(parameter);
+        assert(c);
+        assert(c->parameter);
+        assert(c->type == CONDITION_VIRTUALIZATION);
 
         v = detect_virtualization(&id);
         if (v < 0) {
                 log_warning("Failed to detect virtualization, ignoring: %s", strerror(-v));
-                return false;
+                return c->negate;
         }
 
         /* First, compare with yes/no */
-        b = parse_boolean(parameter);
+        b = parse_boolean(c->parameter);
 
         if (v > 0 && b > 0)
-                return true;
+                return !c->negate;
 
         if (v == 0 && b == 0)
-                return true;
+                return !c->negate;
 
         /* Then, compare categorization */
-        if (v == VIRTUALIZATION_VM && streq(parameter, "vm"))
-                return true;
+        if (v == VIRTUALIZATION_VM && streq(c->parameter, "vm"))
+                return !c->negate;
 
-        if (v == VIRTUALIZATION_CONTAINER && streq(parameter, "container"))
-                return true;
+        if (v == VIRTUALIZATION_CONTAINER && streq(c->parameter, "container"))
+                return !c->negate;
 
         /* Finally compare id */
-        return v > 0 && streq(parameter, id);
+        return (v > 0 && streq(c->parameter, id)) == !c->negate;
 }
 
-static bool test_security(const char *parameter) {
-#ifdef HAVE_SELINUX
-        if (streq(parameter, "selinux"))
-                return is_selinux_enabled() > 0;
-#endif
-        return false;
+static bool condition_test_security(Condition *c) {
+        assert(c);
+        assert(c->parameter);
+        assert(c->type == CONDITION_SECURITY);
+
+        if (streq(c->parameter, "selinux"))
+                return use_selinux() == !c->negate;
+        if (streq(c->parameter, "apparmor"))
+                return use_apparmor() == !c->negate;
+        if (streq(c->parameter, "ima"))
+                return use_ima() == !c->negate;
+        if (streq(c->parameter, "smack"))
+                return use_smack() == !c->negate;
+        return c->negate;
 }
 
-static bool test_capability(const char *parameter) {
+static bool condition_test_capability(Condition *c) {
         cap_value_t value;
         FILE *f;
         char line[LINE_MAX];
         unsigned long long capabilities = (unsigned long long) -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(parameter, &value) < 0)
-                return false;
+        if (cap_from_name(c->parameter, &value) < 0)
+                return c->negate;
 
         /* If it's a valid capability we default to assume
          * that we have it */
 
         f = fopen("/proc/self/status", "re");
         if (!f)
-                return true;
+                return !c->negate;
 
         while (fgets(line, sizeof(line), f)) {
                 truncate_nl(line);
@@ -189,10 +208,53 @@ static bool test_capability(const char *parameter) {
 
         fclose(f);
 
-        return !!(capabilities & (1ULL << value));
+        return !!(capabilities & (1ULL << value)) == !c->negate;
 }
 
-bool condition_test(Condition *c) {
+static bool condition_test_host(Condition *c) {
+        sd_id128_t x, y;
+        char *h;
+        int r;
+        bool b;
+
+        assert(c);
+        assert(c->parameter);
+        assert(c->type == CONDITION_HOST);
+
+        if (sd_id128_from_string(c->parameter, &x) >= 0) {
+
+                r = sd_id128_get_machine(&y);
+                if (r < 0)
+                        return c->negate;
+
+                return sd_id128_equal(x, y);
+        }
+
+        h = gethostname_malloc();
+        if (!h)
+                return c->negate;
+
+        b = fnmatch(c->parameter, h, FNM_CASEFOLD) == 0;
+        free(h);
+
+        return b == !c->negate;
+}
+
+static bool condition_test_ac_power(Condition *c) {
+        int r;
+
+        assert(c);
+        assert(c->parameter);
+        assert(c->type == CONDITION_AC_POWER);
+
+        r = parse_boolean(c->parameter);
+        if (r < 0)
+                return !c->negate;
+
+        return ((on_ac_power() != 0) == !!r) == !c->negate;
+}
+
+static bool condition_test(Condition *c) {
         assert(c);
 
         switch(c->type) {
@@ -222,6 +284,9 @@ bool condition_test(Condition *c) {
         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;
 
@@ -229,6 +294,15 @@ bool condition_test(Condition *c) {
                 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;
 
@@ -239,16 +313,22 @@ bool condition_test(Condition *c) {
         }
 
         case CONDITION_KERNEL_COMMAND_LINE:
-                return test_kernel_command_line(c->parameter) == !c->negate;
+                return condition_test_kernel_command_line(c);
 
         case CONDITION_VIRTUALIZATION:
-                return test_virtualization(c->parameter) == !c->negate;
+                return condition_test_virtualization(c);
 
         case CONDITION_SECURITY:
-                return test_security(c->parameter) == !c->negate;
+                return condition_test_security(c);
 
         case CONDITION_CAPABILITY:
-                return test_capability(c->parameter) == !c->negate;
+                return condition_test_capability(c);
+
+        case CONDITION_HOST:
+                return condition_test_host(c);
+
+        case CONDITION_AC_POWER:
+                return condition_test_ac_power(c);
 
         case CONDITION_NULL:
                 return !c->negate;
@@ -258,7 +338,7 @@ bool condition_test(Condition *c) {
         }
 }
 
-bool condition_test_list(Condition *first) {
+bool condition_test_list(const char *unit, Condition *first) {
         Condition *c;
         int triggered = -1;
 
@@ -273,6 +353,16 @@ bool condition_test_list(Condition *first) {
                 bool b;
 
                 b = condition_test(c);
+                if (unit)
+                        log_debug_unit(unit,
+                                       "%s=%s%s%s %s for %s.",
+                                       condition_type_to_string(c->type),
+                                       c->trigger ? "|" : "",
+                                       c->negate ? "!" : "",
+                                       c->parameter,
+                                       b ? "succeeded" : "failed",
+                                       unit);
+                c->state = b ? 1 : -1;
 
                 if (!c->trigger && !b)
                         return false;
@@ -292,12 +382,13 @@ void condition_dump(Condition *c, FILE *f, const char *prefix) {
                 prefix = "";
 
         fprintf(f,
-                "%s\t%s: %s%s%s\n",
+                "%s\t%s: %s%s%s %s\n",
                 prefix,
                 condition_type_to_string(c->type),
                 c->trigger ? "|" : "",
                 c->negate ? "!" : "",
-                c->parameter);
+                c->parameter,
+                c->state < 0 ? "failed" : c->state > 0 ? "succeeded" : "untested");
 }
 
 void condition_dump_list(Condition *first, FILE *f, const char *prefix) {
@@ -313,10 +404,16 @@ static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
         [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_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"
 };