My application builds on environments that are older, and do not support newer (specific) system calls. I can’t go upgrading them for reasons I can’t disclose, but instead of making it compile time (which would lose out on any ‘benefits’) I was wondering if there’s a way to do in…
Tag: c++
1506-221 (S) Initializer must be a valid constant expression
In AIX during compilation of header file i am facing this issue. Header file (header1.h) has the structure like this: now in .c file including header1.h when i’m compiling the above .c file using xlc compiler it is throwing the error: header1.h”, line xxxx: 1506-221 (S) Initializer must be a valid…
ARM GDB cannot access memory only on Linux
Trying to switch development to Linux, but running into a (probably simple newbie) problem. On my Mac, I can use ARM GDB (arm-eabi-none-gdb from the GNU ARM Embedded Toolchain) to load my elf to my STM32L432, then at my breakpoints a simple i lo (or examine, or whatever) gives me the local vars. On Linux, how…
Global variables in header only library
I’m writing a header-only logger library and I need global variables to store current logger settings (output flags, log file descriptor etc.). My thoughts: I can’t declare variables as extern, as i don’t have access to the translation units to define them I can’t just define global va…
How to get list of files in directory smb libcurl?
I’m trying to get a list of files in the directory with libcurl from the SMB server. But I have a error: If I try to get the file then everything will be okay: Answer It is not currently supported by libcurl. It is however mentioned in the TODO as something that we’d like to see added one day.
Is there any way to “try umount” before actually preform umount?
There can be several mount points under management in linux. I want to umount them all or don’t umount any. Since there are cases when linux cannot umount a device (like someone is on the mount point), I want to add a function to check all mount points and see if the devices can be umounted before I act…
Where to find the source code of timespec_get?
The C11 standard provides the function timespec_get. If I run the example code on cppreference, or on my computer, it works: However, if I look at the sources of glibc here, the code is the following: Which… should not work… Which leads to the question: where is the source code of timespec_get tha…
Where to extract the source code (.cpp files) of wxWidgets under Linux Mint 19 for step inside debugging?
I have successfully installed the wxWidgets v3.1.1 banaries from CodeLite’s website Here The problem is the installation has no .cpp files for step inside debugging. So I had to download the source code to get the .cpp files. My question is where to extract them in the system? Thank you. Answer You can …
C code to access environment variables
I created an environment variable SHELLCODE which contains a 200-byte long NOP sled and a shellcode. It is stored at 0x7fffffffe285, but I’ll try to access 0x7fffffffe2e5, which is around the middle of the NOP sled. Then I wrote the following code to try to access the variable. I used gdb to see the mem…
Attempt to re-bind an already closed listening socket is failing (EADDRINUSE)?
The following is the essence of my test fixture – In the normal use of the application the listening socket is bound only once during the lifetime of the application, however the test setup repeatedly opens and closes the listening socket. The first iteration of the testcase works fine but subsequent it…