I am running UT test case for syslog-ng in cmocka, upgraded Glib library to 2.71.
I am not able to call wrapper function.
I tried linking option --Wl, wrap=g_string_append_c, wrap=g_string_append in make file.
Here are my wrapper functions:
String* __wrap_g_string_append(GString *string, const gchar *val)
{
printf(" wrap_g_string_append is called\n");
return NULL;
}
GString* __wrap_g_string_append_c(GString *string, gchar c)
{
printf(" wrap_g_string_append_c is called\n");
return NULL;
}
sample main function call which is part of syslog-ng:
int main()
{
g_string_append(key, obj_key);
g_string_append_c(key, '.');
}
Here I am able to call __wrap_g_string_append function, but not able to call __wrap_g_string_append_c function, not sure what is the issue here, its calling library function g_string_append_c instead of wrapper function __wrap_g_string_append_c().
I have tried many options mentioned in cmocka forum, nothing has worked for me.
Could someone please help me in resolving the issue, anything I am missing here?
Related
I am using stm32H753xx and Cube FatFs library.
After our e-MMC has been soldered to our board, I want to bring-up.
My startup codes is here:
res = f_mount(&fat_fs, "0:", 0);
if (res != FR_OK) {
res = f_mkfs("", FM_ANY, 0, work, sizeof(work));
if (res != FR_OK) {
while(1) {
LOGGER_REPORT(FORMAT_REQUEST_FAILED);
vTaskDelay(pdMS_TO_TICKS(1000));
}
}
res = f_mount(&fat_fs, "0:", 0);
if (res != FR_OK) {
while(1) {
LOGGER_REPORT(FORMATTED_BUT_NOT_MOUNTED);
vTaskDelay(pdMS_TO_TICKS(1000));
}
}
}
I generally expect an error at mounting phase if bringing-up of a memory device is very first time and this implies why I made my software branch to f_mkfs functions if f_mount fails. But f_mount is returning FR_OK and software is skipping here.
Afterwards, I am doing some api calls to detect latest directory in the root and to create new one by giving a name in way that would be latest+1. ( latest is like ./70/ new one ./71/ anyway)
There are some api calls here f_opendir, f_readdir, f_closedir respectively and all of them returns succesfully but,
whenever I want to create new dir by calling fs_mkdir, it returns FR_NO_FILESYTEM.
If I call f_mkfs after f_mount above, a FAT is creating and software works but I can not call f_mkfs ile that and could not figure it out where I have to put this code to make it run only once at very initial bring-up of e-MMC.
I want to create an output file in a threadsafe manner, and only if it does not exist. I want to use the file system for synchronization. With open() I would use the flags O_RWRONLY|O_CREAT|O_EXCL. Is there a way to do this in C++17 using the iostream or fstream ?
Prior to C++23 there is no way of opening an ofstream in exclusive mode.
Workaround: Use std::fopen which has this capability since C++17.
Example:
#include <cstdio>
// Mode "x" to make it fail if it already exists
std::FILE* fp = std::fopen("filename", "wx");
if(fp) {
// created exclusively
// work with fp ...
std::fclose(fp);
}
If you really want an ofstream you could create a helper function:
template<class Stream>
Stream open_exclusively(const std::string& filename) {
Stream rv;
if(std::FILE* fp = std::fopen(filename.c_str(), "wx"); fp) {
std::fclose(fp);
// overwrite the file that was created exclusively:
rv.open(filename);
} else {
// could not create file exclusivly, set the failbit in the stream:
rv.setstate(Stream::failbit);
}
return rv;
}
int main() {
auto os = open_exclusively<std::ofstream>("filename");
if(os) {
std::cout << "file created exclusively\n";
}
}
Demo
Edit:
Even though the above demo is compliant and works on all platforms I've tested it - wine (v6.16) can't handle it, so I opened a bug report at bugs.winehq.org. You can follow the progress here:
Standard library call fopen(..., "wx") not recognized - causes destruction of data
Edit 2:
The Wine bugfix ucrtbase: Add support for x mode in fopen is now included in Wine 6.20 so after upgrading to 6.20 (or later), this will be working as it should in Wine too.
From C++23 you can use the std::ios::noreplace openmode:
std::ofstream os("filename", std::ios::noreplace);
if(os) {
std::cout << "file created exclusively\n";
}
What I have so far is:
void startQueryIPv4(const char *hostName){
printf("startQueryIPv4");
DNSServiceRef serviceRef;
DNSServiceGetAddrInfo(&serviceRef, kDNSServiceFlagsForceMulticast, 0, kDNSServiceProtocol_IPv4, hostName, queryIPv4Callback, NULL);
DNSServiceProcessResult(serviceRef);
DNSServiceRefDeallocate(serviceRef);
}
static void queryIPv4Callback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t interfaceIndex, DNSServiceErrorType errorCode, const char *hostname, const struct sockaddr *address, uint32_t ttl, void *context){
printf("queryIPv4Callback");
if (errorCode == kDNSServiceErr_NoError) {
printf("no error");
char *theAddress = NULL;
switch(address->sa_family) {
case AF_INET: {
struct sockaddr_in *addr_in = (struct sockaddr_in *)address;
theAddress = malloc(INET_ADDRSTRLEN);
inet_ntop(AF_INET, &(addr_in->sin_addr), theAddress, INET_ADDRSTRLEN);
break;
}
case AF_INET6: {
struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)address;
theAddress = malloc(INET6_ADDRSTRLEN);
inet_ntop(AF_INET6, &(addr_in6->sin6_addr), theAddress, INET6_ADDRSTRLEN);
break;
}
default:
break;
}
printf("IP address: %s\n", theAddress);
free(theAddress);
} else {
printf("%d", errorCode);
}
}
But the callback is never called.
In the console I get this error: TIC Read Status [9:0x0]: 1:57
ObjectiveC is not my power but I had to mess with it. Any help will be appreciated.
Inasmuch as Objective-C is a true superset of C and Darwin is certified compatible with SUS 3, your Objective-C program for iOS should be able to use the C interface to the system's name resolver: getaddrinfo(). You can use the third argument to this function to specify that you want only IPv4 results (or only IPv6 results).
Things of which you should be aware:
this is of course a synchronous interface; if you want asynchronous then you'll need to arrange for that yourself.
getaddrinfo() allocates and returns a linked list of addresses, so
in principle, you might need to check more than one
you need to free the list after you're done with it via freeaddrinfo()
The reason you aren't getting a callback is that you aren't using a dispatch queue. The DNSServiceGetAddrInfo API is asynchronous. If you are doing this on an Apple device, you want something more like this:
void startQueryIPv4(const char *hostName) {
printf("startQueryIPv4");
DNSServiceRef serviceRef;
DNSServiceGetAddrInfo(&serviceRef, kDNSServiceFlagsForceMulticast, 0, kDNSServiceProtocol_IPv4, hostName, queryIPv4Callback, NULL);
main_queue = dispatch_get_main_queue();
DNSServiceSetDispatchQueue(sdref, main_queue);
dispatch_main();
}
Note that dispatch_main() is the main event loop for libdispatch: if you want to do other stuff, you need to schedule it in the dispatch loop, because dispatch_main() will not return.
In your original code you called DNSServiceRefDeallocate(), but you can't do that until you want to stop the query. If you call it right after you start the query, it will cancel the query. So e.g. you could call it from the callback.
However, a better flow would be to do a long-lived query (kDNSServiceFlagsLongLivedQuery) so that you get an update whenever the information changes. Of course you'd then need to change the host you're connecting to, so only do this if your application will be connected for an extended period.
Additionally, you may get more than one answer. If you do, it may be that some answers work to connect, and others don't. So you might like to accumulate answers and try each one, rather than giving up if the first answer you get doesn't work. The callback will include the kDNSServiceFlagsMoreComing flag if there is more data coming immediately. Each time the callback is called, it will get one answer (or an indication that the query has failed in some way).
Of course, this is a fairly low-level API. If you want to make your life a bit easier, you should use Network Framework. Network Framework does the "happy eyeballs" part for you—trying each response until it gets a connection, and returning you the connection it gets, canceling the others.
But you didn't ask about that, so I won't go into details here.
All,
Here is a unit test for checking the size of a collection
main() {
test("Resource Manager Image Load", () {
ResourceManager rm = new ResourceManager();
int WRONG_SIZE = 1000000;
rm.loadImageManifest("data/rm/test_images.yaml").then((_){
print("Length="+ rm.images.length.toString()); // PRINTS '6' - WHICH IS CORRECT
expect(rm.images, hasLength(WRONG_SIZE));
});
});
}
I am running this from a browser (client-side Dart libraries are in use) and it ALWAYS passes, no matter what the value of WRONG_SIZE.
Help appreciated.
In such simple cases you can just return the future. The unit test framework recognizes it and waits for the future to complete. This also works for setUp/tearDown.
main() {
test("Resource Manager Image Load", () {
ResourceManager rm = new ResourceManager();
int WRONG_SIZE = 1000000;
return rm.loadImageManifest("data/rm/test_images.yaml").then((_) {
//^^^^
print("Length="+ rm.images.length.toString()); // PRINTS '6' - WHICH IS CORRECT
expect(rm.images, hasLength(WRONG_SIZE));
});
});
}
The problem is that your code returns a Future, and your test completes before the code in the Future has finished, so there's nothing to cause it to fail.
Check out the Asynchronous Tests section on the Dart site. There are methods like expectAsync that allow the future to be passed to the test framework so that it can wait for them to complete and handle the result correctly.
Here's an example (note the expect call is now inside the function passed to expectAsync)
test('callback is executed once', () {
// wrap the callback of an asynchronous call with [expectAsync] if
// the callback takes 0 arguments...
var timer = Timer.run(expectAsync(() {
int x = 2 + 3;
expect(x, equals(5));
}));
});
im developing a little firefox addon with the addon-sdk provided by mozilla. The addon should work on only one specific website and it needs to block a js-file from this website. I'm searching for hours on how to block such a request.
Hopefully someone knows the answer
Yeah, you'd have to do this mostly by hand. The SDK isn't going to help you much at all here but it is somewhat possible.
This is along the lines of what you'd need to do. Note that this isn't tested and won't work out of the box but just to give you an idea of what components are involved and where to find more resources.
const { Cc, Ci, Cm, components } = require("chrome");
Cu.import("resource://gre/modules/XPCOMUtils.jsm", this);
const CategoryManager = Cc["#mozilla.org/categorymanager;1"]
.getService(Ci.nsICategoryManager);
function PolicyComponent() { }
PolicyComponent.prototype = {
desc: "My nsIContentPolicy XPCOM Component",
classID: components.ID("{3ffd2f60-3784-11e1-b86c-0800200c9a66}"),
contractID: "#abc.def.com/policycomp;1",
QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPolicy]),
shouldLoad: function(contentType, contentLocation, requestOrigin, aContext, mimeTypeGuess, extra) {
if (contentLocation.spec != BLOCKED_JS) { return return Ci.nsIContentPolicy.ACCEPT; }
else { return Ci.nsIContentPolicy.REJECT_REQUEST; }
},
shouldProcess: function() {
return CI.nsIContentPolicy.ACCEPT;
}
}
var pc = new PolicyComponent()
// Register the Interface
Cm.QueryInterface(Ci.nsIComponentRegistrar).registerFactory(pc.uuid, pc.desc, pc.contractID, pc);
// Add the content policy
CategoryManager.addCategoryEntry("content-policy",pc.className,pc.contractID, true, true); // not sure you should replace (last true statement)
See this post for more:
What is missing in my nsIContentPolicy Firefox/IceWeasel extension XPCOMponent implementation for the shouldLoad to be called?
Also take a look at these docs: https://developer.mozilla.org/en/XUL_School/Intercepting_Page_Loads#Content_Policy