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sd-bus: add a variant of sd_bus_error_has_name() that takes multiple names

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-08-22 18:24:43 +02:00
parent eea63c03b9
commit 2b07ec316a
6 changed files with 55 additions and 8 deletions
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2
man/rules/meson.build
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@ -241,6 +241,8 @@ manpages = [
'sd_bus_error_free',
'sd_bus_error_get_errno',
'sd_bus_error_has_name',
'sd_bus_error_has_names',
'sd_bus_error_has_names_sentinel',
'sd_bus_error_is_set',
'sd_bus_error_move',
'sd_bus_error_set',

27
man/sd_bus_error.xml
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@ -31,6 +31,8 @@
<refname>sd_bus_error_move</refname>
<refname>sd_bus_error_is_set</refname>
<refname>sd_bus_error_has_name</refname>
<refname>sd_bus_error_has_names_sentinel</refname>
<refname>sd_bus_error_has_names</refname>
<refpurpose>sd-bus error handling</refpurpose>
</refnamediv>
@ -128,6 +130,16 @@
<paramdef>const sd_bus_error *<parameter>e</parameter></paramdef>
<paramdef>const char *<parameter>name</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_error_has_names_sentinel</function></funcdef>
<paramdef>const sd_bus_error *<parameter>e</parameter></paramdef>
<paramdef>...</paramdef>
</funcprototype>
<para>
&#35;define sd_bus_error_has_names(e, ...) sd_bus_error_has_names_sentinel(e, ..., NULL)
</para>
</funcsynopsis>
</refsynopsisdiv>
@ -268,6 +280,12 @@
<parameter>name</parameter> has been set,
<constant>false</constant> otherwise.</para>
<para><function>sd_bus_error_has_names_sentinel()</function> is similar to
<function>sd_bus_error_has_name()</function>, but takes multiple names to check against. The list must be
terminated with <constant>NULL</constant>. <function>sd_bus_error_has_names()</function>
is a macro wrapper around <function>sd_bus_error_has_names_sentinel()</function> that adds the
<constant>NULL</constant> sentinel automatically.</para>
<para><function>sd_bus_error_free()</function> will destroy
resources held by <parameter>e</parameter>. The parameter itself
will not be deallocated, and must be <citerefentry
@ -307,11 +325,10 @@
<structfield>name</structfield> field are
non-<constant>NULL</constant>, zero otherwise.</para>
<para><function>sd_bus_error_has_name()</function> returns a
non-zero value when <parameter>e</parameter> is
non-<constant>NULL</constant> and the
<structfield>name</structfield> field is equal to
<parameter>name</parameter>, zero otherwise.</para>
<para><function>sd_bus_error_has_name()</function>, <function>sd_bus_error_has_names()</function>, and
<function>sd_bus_error_has_names_sentinel()</function> return a non-zero value when <parameter>e</parameter> is
non-<constant>NULL</constant> and the <structfield>name</structfield> field is equal to one of the given
names, zero otherwise.</para>
</refsect1>
<refsect1>

5
src/libsystemd/libsystemd.sym
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@ -727,3 +727,8 @@ global:
sd_event_add_time_relative;
sd_event_source_set_time_relative;
} LIBSYSTEMD_246;
LIBSYSTEMD_248 {
global:
sd_bus_error_has_names_sentinel;
} LIBSYSTEMD_247;

19
src/libsystemd/sd-bus/bus-error.c
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@ -13,6 +13,7 @@
#include "errno-list.h"
#include "errno-util.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"
BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map bus_standard_errors[] = {
@ -355,11 +356,23 @@ _public_ int sd_bus_error_has_name(const sd_bus_error *e, const char *name) {
return streq_ptr(e->name, name);
}
_public_ int sd_bus_error_get_errno(const sd_bus_error* e) {
if (!e)
_public_ int sd_bus_error_has_names_sentinel(const sd_bus_error *e, ...) {
if (!e || !e->name)
return 0;
if (!e->name)
va_list ap;
const char *p;
va_start(ap, e);
while ((p = va_arg(ap, const char *)))
if (streq(p, e->name))
break;
va_end(ap);
return !!p;
}
_public_ int sd_bus_error_get_errno(const sd_bus_error* e) {
if (!e || !e->name)
return 0;
return bus_error_name_to_errno(e->name);

8
src/libsystemd/sd-bus/test-bus-error.c
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@ -22,6 +22,11 @@ static void test_error(void) {
assert_se(streq(error.name, SD_BUS_ERROR_NOT_SUPPORTED));
assert_se(streq(error.message, "xxx"));
assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_NOT_SUPPORTED));
assert_se(sd_bus_error_has_names_sentinel(&error, SD_BUS_ERROR_NOT_SUPPORTED, NULL));
assert_se(sd_bus_error_has_names(&error, SD_BUS_ERROR_NOT_SUPPORTED));
assert_se(sd_bus_error_has_names(&error, SD_BUS_ERROR_NOT_SUPPORTED, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_has_names(&error, SD_BUS_ERROR_FILE_NOT_FOUND, SD_BUS_ERROR_NOT_SUPPORTED, NULL));
assert_se(!sd_bus_error_has_names(&error, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_get_errno(&error) == EOPNOTSUPP);
assert_se(sd_bus_error_is_set(&error));
sd_bus_error_free(&error);
@ -32,6 +37,7 @@ static void test_error(void) {
assert_se(error.name == NULL);
assert_se(error.message == NULL);
assert_se(!sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(!sd_bus_error_has_names(&error, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_get_errno(&error) == 0);
assert_se(!sd_bus_error_is_set(&error));
@ -39,6 +45,7 @@ static void test_error(void) {
assert_se(streq(error.name, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(streq(error.message, "yyy -1"));
assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_has_names(&error, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_get_errno(&error) == ENOENT);
assert_se(sd_bus_error_is_set(&error));
@ -51,6 +58,7 @@ static void test_error(void) {
assert_se(streq(error.message, second.message));
assert_se(sd_bus_error_get_errno(&second) == ENOENT);
assert_se(sd_bus_error_has_name(&second, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_has_names(&second, SD_BUS_ERROR_FILE_NOT_FOUND));
assert_se(sd_bus_error_is_set(&second));
sd_bus_error_free(&error);

2
src/systemd/sd-bus.h
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@ -458,6 +458,8 @@ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e);
int sd_bus_error_move(sd_bus_error *dest, sd_bus_error *e);
int sd_bus_error_is_set(const sd_bus_error *e);
int sd_bus_error_has_name(const sd_bus_error *e, const char *name);
int sd_bus_error_has_names_sentinel(const sd_bus_error *e, ...) _sd_sentinel_;
#define sd_bus_error_has_names(e, ...) sd_bus_error_has_names_sentinel(e, __VA_ARGS__, NULL)
#define SD_BUS_ERROR_MAP(_name, _code) \
{ \