condition: properly allow passing back errors from condition checks

4 files changed, 43 insertions, 35 deletions

diff --git a/src/shared/architecture.c b/src/shared/architecture.c
index dc45f3589d..34c5a53fa9 100644
--- a/src/shared/architecture.c
+++ b/src/shared/architecture.c
@@ -23,7 +23,7 @@
 
 #include "architecture.h"
 
-Architecture uname_architecture(void) {
+int uname_architecture(void) {
 
         /* Return a sanitized enum identifying the architecture we are
          * running on. This is based on uname(), and the user may
@@ -41,7 +41,7 @@ Architecture uname_architecture(void) {
 
         static const struct {
                 const char *machine;
-                Architecture arch;
+                int arch;
         } arch_map[] = {
 #if defined(__x86_64__) || defined(__i386__)
                 { "x86_64",     ARCHITECTURE_X86_64   },
@@ -121,7 +121,7 @@ Architecture uname_architecture(void) {
 #endif
         };
 
-        static Architecture cached = _ARCHITECTURE_INVALID;
+        static int cached = _ARCHITECTURE_INVALID;
         struct utsname u;
         unsigned i;
 
@@ -168,4 +168,4 @@ static const char *const architecture_table[_ARCHITECTURE_MAX] = {
         [ARCHITECTURE_CRIS] = "cris",
 };
 
-DEFINE_STRING_TABLE_LOOKUP(architecture, Architecture);
+DEFINE_STRING_TABLE_LOOKUP(architecture, int);
diff --git a/src/shared/architecture.h b/src/shared/architecture.h
index 353d49bedf..f1fef23cf2 100644
--- a/src/shared/architecture.h
+++ b/src/shared/architecture.h
@@ -30,7 +30,7 @@
  * focus on general family, and distuignish word width and
  * endianness. */
 
-typedef enum Architecture {
+enum {
         ARCHITECTURE_X86 = 0,
         ARCHITECTURE_X86_64,
         ARCHITECTURE_PPC,
@@ -60,9 +60,9 @@ typedef enum Architecture {
         ARCHITECTURE_CRIS,
         _ARCHITECTURE_MAX,
         _ARCHITECTURE_INVALID = -1
-} Architecture;
+};
 
-Architecture uname_architecture(void);
+int uname_architecture(void);
 
 /*
  * LIB_ARCH_TUPLE should resolve to the local library path
@@ -188,5 +188,5 @@ Architecture uname_architecture(void);
 #error "Please register your architecture here!"
 #endif
 
-const char *architecture_to_string(Architecture a) _const_;
-Architecture architecture_from_string(const char *s) _pure_;
+const char *architecture_to_string(int a) _const_;
+int architecture_from_string(const char *s) _pure_;
diff --git a/src/shared/condition-util.c b/src/shared/condition-util.c
index 026b6a8712..33752c8f91 100644
--- a/src/shared/condition-util.c
+++ b/src/shared/condition-util.c
@@ -73,7 +73,7 @@ void condition_free_list(Condition *first) {
                 condition_free(c);
 }
 
-bool condition_test_kernel_command_line(Condition *c) {
+int condition_test_kernel_command_line(Condition *c) {
         _cleanup_free_ char *line = NULL;
         const char *p;
         bool equal;
@@ -85,8 +85,8 @@ bool condition_test_kernel_command_line(Condition *c) {
 
         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, '=');
@@ -97,7 +97,9 @@ bool condition_test_kernel_command_line(Condition *c) {
                 bool found;
 
                 r = unquote_first_word(&p, &word);
-                if (r <= 0)
+                if (r < 0)
+                        return r;
+                if (r == 0)
                         return c->negate;
 
                 if (equal)
@@ -116,7 +118,7 @@ bool condition_test_kernel_command_line(Condition *c) {
         return c->negate;
 }
 
-bool condition_test_virtualization(Condition *c) {
+int condition_test_virtualization(Condition *c) {
         int b, v;
         const char *id;
 
@@ -125,10 +127,8 @@ bool condition_test_virtualization(Condition *c) {
         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);
@@ -150,8 +150,8 @@ bool condition_test_virtualization(Condition *c) {
         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);
@@ -159,20 +159,19 @@ bool condition_test_architecture(Condition *c) {
 
         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;
@@ -185,19 +184,19 @@ bool condition_test_host(Condition *c) {
 
                 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);
@@ -206,7 +205,7 @@ bool condition_test_ac_power(Condition *c) {
 
         r = parse_boolean(c->parameter);
         if (r < 0)
-                return !c->negate;
+                return r;
 
         return ((on_ac_power() != 0) == !!r) == !c->negate;
 }
@@ -225,7 +224,7 @@ void condition_dump(Condition *c, FILE *f, const char *prefix) {
                 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) {
diff --git a/src/shared/condition-util.h b/src/shared/condition-util.h
index 047fdbfd86..fbb8150083 100644
--- a/src/shared/condition-util.h
+++ b/src/shared/condition-util.h
@@ -51,6 +51,16 @@ typedef enum ConditionType {
         _CONDITION_TYPE_INVALID = -1
 } ConditionType;
 
+#define CONDITION_STATE_IS_SUCCEEDED(state) ((state) > 0)
+#define CONDITION_STATE_IS_UNKNOWN(state) ((state) == 0)
+#define CONDITION_STATE_IS_FAILED(state) ((state) < 0)
+
+enum {
+        CONDITION_STATE_SUCCEEDED = -1,
+        CONDITION_STATE_UNKNOWN = 0,
+        CONDITION_STATE_FAILED = 1
+};
+
 typedef struct Condition {
         ConditionType type;
 
@@ -58,7 +68,6 @@ typedef struct Condition {
         bool negate:1;
 
         char *parameter;
-
         int state;
 
         LIST_FIELDS(struct Condition, conditions);
@@ -68,11 +77,11 @@ Condition* condition_new(ConditionType type, const char *parameter, bool trigger
 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_architecture(Condition *c);
-bool condition_test_host(Condition *c);
-bool condition_test_ac_power(Condition *c);
+int condition_test_kernel_command_line(Condition *c);
+int condition_test_virtualization(Condition *c);
+int condition_test_architecture(Condition *c);
+int condition_test_host(Condition *c);
+int 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);