tree-wide: use SET_FLAG() macro to make code more clear

[elogind.git] / src / libelogind / sd-bus / bus-message.c

diff --git a/src/libelogind/sd-bus/bus-message.c b/src/libelogind/sd-bus/bus-message.c
index 3261154e04867feb13239550d5b8f9c87e1f3a7f..fb3311c2798e7fd255bac80aaa006b360bbf4b19 100644 (file)
--- a/src/libelogind/sd-bus/bus-message.c
+++ b/src/libelogind/sd-bus/bus-message.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
 /***
   This file is part of systemd.
 
@@ -23,19 +21,23 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 
-#include "util.h"
-#include "utf8.h"
-#include "strv.h"
-#include "time-util.h"
-#include "memfd-util.h"
-
 #include "sd-bus.h"
-#include "bus-message.h"
+
+#include "alloc-util.h"
+#include "bus-gvariant.h"
 #include "bus-internal.h"
-#include "bus-type.h"
+#include "bus-message.h"
 #include "bus-signature.h"
-#include "bus-gvariant.h"
+#include "bus-type.h"
 #include "bus-util.h"
+#include "fd-util.h"
+#include "io-util.h"
+#include "memfd-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "time-util.h"
+#include "utf8.h"
+#include "util.h"
 
 static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
 
@@ -113,8 +115,7 @@ static void message_reset_containers(sd_bus_message *m) {
                 free(m->containers[i].offsets);
         }
 
-        free(m->containers);
-        m->containers = NULL;
+        m->containers = mfree(m->containers);
 
         m->n_containers = m->containers_allocated = 0;
         m->root_container.index = 0;
@@ -144,11 +145,7 @@ static void message_free(sd_bus_message *m) {
         if (m->iovec != m->iovec_fixed)
                 free(m->iovec);
 
-        if (m->destination_ptr) {
-                free(m->destination_ptr);
-                m->destination_ptr = NULL;
-        }
-
+        m->destination_ptr = mfree(m->destination_ptr);
         message_reset_containers(m);
         free(m->root_container.signature);
         free(m->root_container.offsets);
@@ -803,7 +800,7 @@ _public_ int sd_bus_message_new_method_errorf(
                 const char *format,
                 ...) {
 
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         va_list ap;
 
         assert_return(name, -EINVAL);
@@ -822,7 +819,7 @@ _public_ int sd_bus_message_new_method_errno(
                 int error,
                 const sd_bus_error *p) {
 
-        _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL;
 
         if (sd_bus_error_is_set(p))
                 return sd_bus_message_new_method_error(call, m, p);
@@ -832,8 +829,7 @@ _public_ int sd_bus_message_new_method_errno(
         return sd_bus_message_new_method_error(call, m, &berror);
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_new_method_errnof(
                 sd_bus_message *call,
                 sd_bus_message **m,
@@ -841,7 +837,7 @@ _public_ int sd_bus_message_new_method_errnof(
                 const char *format,
                 ...) {
 
-        _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL;
         va_list ap;
 
         va_start(ap, format);
@@ -923,7 +919,9 @@ fail:
 }
 
 _public_ sd_bus_message* sd_bus_message_ref(sd_bus_message *m) {
-        assert_return(m, NULL);
+
+        if (!m)
+                return NULL;
 
         assert(m->n_ref > 0);
         m->n_ref++;
@@ -946,8 +944,7 @@ _public_ sd_bus_message* sd_bus_message_unref(sd_bus_message *m) {
         return NULL;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_get_type(sd_bus_message *m, uint8_t *type) {
         assert_return(m, -EINVAL);
         assert_return(type, -EINVAL);
@@ -1034,13 +1031,14 @@ _public_ const char *sd_bus_message_get_sender(sd_bus_message *m) {
 
 _public_ const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m) {
         assert_return(m, NULL);
-        assert_return(sd_bus_error_is_set(&m->error), NULL);
+
+        if (!sd_bus_error_is_set(&m->error))
+                return NULL;
 
         return &m->error;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_get_monotonic_usec(sd_bus_message *m, uint64_t *usec) {
         assert_return(m, -EINVAL);
         assert_return(usec, -EINVAL);
@@ -1084,8 +1082,7 @@ _public_ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m) {
         return &m->creds;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_is_signal(
                 sd_bus_message *m,
                 const char *interface,
@@ -1137,44 +1134,31 @@ _public_ int sd_bus_message_is_method_error(sd_bus_message *m, const char *name)
         return 1;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_set_expect_reply(sd_bus_message *m, int b) {
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
         assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EPERM);
 
-        if (b)
-                m->header->flags &= ~BUS_MESSAGE_NO_REPLY_EXPECTED;
-        else
-                m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED;
+        SET_FLAG(m->header->flags, BUS_MESSAGE_NO_REPLY_EXPECTED, !b);
 
         return 0;
 }
-#endif // 0
 
 _public_ int sd_bus_message_set_auto_start(sd_bus_message *m, int b) {
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
 
-        if (b)
-                m->header->flags &= ~BUS_MESSAGE_NO_AUTO_START;
-        else
-                m->header->flags |= BUS_MESSAGE_NO_AUTO_START;
+        SET_FLAG(m->header->flags, BUS_MESSAGE_NO_AUTO_START, !b);
 
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
 _public_ int sd_bus_message_set_allow_interactive_authorization(sd_bus_message *m, int b) {
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
 
-        if (b)
-                m->header->flags |= BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION;
-        else
-                m->header->flags &= ~BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION;
+        SET_FLAG(m->header->flags, BUS_MESSAGE_ALLOW_INTERACTIVE_AUTHORIZATION, b);
 
         return 0;
 }
@@ -1215,7 +1199,7 @@ struct bus_body_part *message_append_part(sd_bus_message *m) {
 
         part->memfd = -1;
         m->body_end = part;
-        m->n_body_parts ++;
+        m->n_body_parts++;
 
         return part;
 }
@@ -1660,7 +1644,7 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
         }
 
         if (type == SD_BUS_TYPE_UNIX_FD)
-                m->n_fds ++;
+                m->n_fds++;
 
         if (c->enclosing != SD_BUS_TYPE_ARRAY)
                 c->index++;
@@ -1673,6 +1657,7 @@ _public_ int sd_bus_message_append_basic(sd_bus_message *m, char type, const voi
         return message_append_basic(m, type, p, NULL);
 }
 
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_append_string_space(
                 sd_bus_message *m,
                 size_t size,
@@ -1730,8 +1715,6 @@ _public_ int sd_bus_message_append_string_space(
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
 _public_ int sd_bus_message_append_string_iovec(
                 sd_bus_message *m,
                 const struct iovec *iov,
@@ -2407,9 +2390,9 @@ int bus_message_append_ap(
 
                 t = types;
                 if (n_array != (unsigned) -1)
-                        n_array --;
+                        n_array--;
                 else {
-                        types ++;
+                        types++;
                         n_struct--;
                 }
 
@@ -2590,6 +2573,7 @@ _public_ int sd_bus_message_append(sd_bus_message *m, const char *types, ...) {
         return r;
 }
 
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_append_array_space(
                 sd_bus_message *m,
                 char type,
@@ -2651,14 +2635,11 @@ _public_ int sd_bus_message_append_array(
         if (r < 0)
                 return r;
 
-        if (size > 0)
-                memcpy(p, ptr, size);
+        memcpy_safe(p, ptr, size);
 
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
 _public_ int sd_bus_message_append_array_iovec(
                 sd_bus_message *m,
                 char type,
@@ -2710,7 +2691,7 @@ _public_ int sd_bus_message_append_array_memfd(
         int r;
 
         assert_return(m, -EINVAL);
-        assert_return(memfd >= 0, -EINVAL);
+        assert_return(memfd >= 0, -EBADF);
         assert_return(bus_type_is_trivial(type), -EINVAL);
         assert_return(size > 0, -EINVAL);
         assert_return(!m->sealed, -EPERM);
@@ -2786,7 +2767,7 @@ _public_ int sd_bus_message_append_string_memfd(
         int r;
 
         assert_return(m, -EINVAL);
-        assert_return(memfd >= 0, -EINVAL);
+        assert_return(memfd >= 0, -EBADF);
         assert_return(size > 0, -EINVAL);
         assert_return(!m->sealed, -EPERM);
         assert_return(!m->poisoned, -ESTALE);
@@ -3170,8 +3151,7 @@ static bool message_end_of_array(sd_bus_message *m, size_t index) {
         }
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_at_end(sd_bus_message *m, int complete) {
         assert_return(m, -EINVAL);
         assert_return(m->sealed, -EPERM);
@@ -3893,7 +3873,7 @@ static int build_struct_offsets(
                 if (r < 0)
                         return r;
                 if (r == 0 && p[n] != 0) /* except the last item */
-                        n_variable ++;
+                        n_variable++;
                 n_total++;
 
                 p += n;
@@ -4493,9 +4473,9 @@ static int message_read_ap(
 
                 t = types;
                 if (n_array != (unsigned) -1)
-                        n_array --;
+                        n_array--;
                 else {
-                        types ++;
+                        types++;
                         n_struct--;
                 }
 
@@ -5571,8 +5551,7 @@ _public_ int sd_bus_message_set_destination(sd_bus_message *m, const char *desti
         return message_append_field_string(m, BUS_MESSAGE_HEADER_DESTINATION, SD_BUS_TYPE_STRING, destination, &m->destination);
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) {
         size_t total;
         void *p, *e;
@@ -5646,21 +5625,23 @@ _public_ int sd_bus_message_read_strv(sd_bus_message *m, char ***l) {
         return 1;
 }
 
-int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str, char ***strv) {
-        const char *contents;
+static int bus_message_get_arg_skip(
+                sd_bus_message *m,
+                unsigned i,
+                char *_type,
+                const char **_contents) {
+
         unsigned j;
-        char type;
         int r;
 
-        assert(m);
-        assert(str);
-        assert(strv);
-
         r = sd_bus_message_rewind(m, true);
         if (r < 0)
                 return r;
 
         for (j = 0;; j++) {
+                const char *contents;
+                char type;
+
                 r = sd_bus_message_peek_type(m, &type, &contents);
                 if (r < 0)
                         return r;
@@ -5672,31 +5653,56 @@ int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str, char **
                     !(type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g")))
                         return -ENXIO;
 
-                if (j >= i)
-                        break;
+                if (j >= i) {
+                        if (_contents)
+                                *_contents = contents;
+                        if (_type)
+                                *_type = type;
+                        return 0;
+                }
 
                 r = sd_bus_message_skip(m, NULL);
                 if (r < 0)
                         return r;
         }
 
-        if (type == SD_BUS_TYPE_ARRAY) {
+}
+
+int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str) {
+        char type;
+        int r;
+
+        assert(m);
+        assert(str);
 
-                r = sd_bus_message_read_strv(m, strv);
+        r = bus_message_get_arg_skip(m, i, &type, NULL);
                 if (r < 0)
                         return r;
 
-                *str = NULL;
+        if (!IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE))
+                return -ENXIO;
 
-        } else {
-                r = sd_bus_message_read_basic(m, type, str);
+        return sd_bus_message_read_basic(m, type, str);
+}
+
+int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv) {
+        const char *contents;
+        char type;
+        int r;
+
+        assert(m);
+        assert(strv);
+
+        r = bus_message_get_arg_skip(m, i, &type, &contents);
                 if (r < 0)
                         return r;
 
-                *strv = NULL;
-        }
+        if (type != SD_BUS_TYPE_ARRAY)
+                return -ENXIO;
+        if (!STR_IN_SET(contents, "s", "o", "g"))
+                return -ENXIO;
 
-        return 0;
+        return sd_bus_message_read_strv(m, strv);
 }
 
 _public_ int sd_bus_message_get_errno(sd_bus_message *m) {
@@ -5717,8 +5723,7 @@ _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complet
         return strempty(c->signature);
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_is_empty(sd_bus_message *m) {
         assert_return(m, -EINVAL);
 
@@ -5811,8 +5816,7 @@ _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int
         return done_something;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_message_verify_type(sd_bus_message *m, char type, const char *contents) {
         const char *c;
         char t;
@@ -5846,7 +5850,7 @@ _public_ sd_bus *sd_bus_message_get_bus(sd_bus_message *m) {
 }
 
 int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) {
-        _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
+        _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL;
         usec_t timeout;
         int r;
 
@@ -5930,8 +5934,7 @@ int bus_message_remarshal(sd_bus *bus, sd_bus_message **m) {
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 int bus_message_append_sender(sd_bus_message *m, const char *sender) {
         assert(m);
         assert(sender);