So I already know how to specify locations for trusted certificates using SSL_CTX_load_verify_locations(). Now the documentation says the following: SSL_CTX_load_verify_locations() specifies the locations for ctx, at which CA certificates for verification purposes are located. The certificates available via CAfile and CApath are trusted. And also says: When looking up CA certificates, the OpenSSL library will first search the certificates in
Tag: c++
core dumped message is not captured in STDERR
I used to call my program with this line in bash shell to capture all stdout and stderr messages in the log file The log file shows no error but by examining the log, it’s obvious that there’s a problem and program terminates abruptly in the middle of execution. I have also tried these but the result is the same:
Usage of lstat / stat from the linux kernel?
I’m hoping someone can fact check my assumptions on the question “Can lstat and/or stat be called form the Linux kernel 3.10.0 in Centos 7. I’ve been searching and reading as much as I can find and have only been able to confuse myself. I can’t tell if the examples I am finding are available to kernel space or user
C Just Delete Some Part Of File
I have two files. I want to copy source file to destionation file. If they are different, then I just want to copy different line not all file. In the below case, two line are same, but destination has extra line. How can I just delete last line of destination file? For example: Answer On POSIX systems, if you want
What is the fastest way to increase the size of a file in linux on a ext4 filesystem from a C executable without creating holes in the file?
The fastest way to increase the file size that I know of would be to ftruncate() or lseek() to the desired size and write a single byte. That doesn’t fit my needs in this case because the resulting hole in the file doesn’t reserve space in the file system. Is the best alternative to use calloc() and write()? Perhaps this
what is the difference between uio.h and io.h?
Sometimes I see compiler complaining about this line with fatal error: sys/io.h: No such file or directory If I simply change it to It will magically work. Can someone explain to me the difference? Why do some OSes have one but not the other? Edit: This issue happens on a Linux, not just OS X. Answer Generally speaking, it is
Compile Linux project in Visual Studio 2008 [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 7 years ago. Improve this question I have a project in Linux, but it’s cross platform code. How can I compile it in Visual Studio 2008
MacOS Create a Process in suspended state
Use-case Create a new process ( running an arbitrary application ) in suspended mode ( using eg. exec ) Process created ( MachO loaded ) but no single line of code executed Do some stuff w/ the suspended process memory Resume the process On windows, once can use CreateProcess in conjunction with the “CREATE_SUSPENDED” to achieve the above mentioned. Is
Linux – Get the start and end of the stack memory for a thread
I am trying to port something to Linux. My original code (for a RTOS) looks like: Later the stack and stackSize are used by the garbage collector and to get some thread statistics. Now, how do I convert the above code to Linux? Answer You should use Pthread: http://www.manpagez.com/man/3/pthread_attr/ http://www.manpagez.com/man/3/pthread_create/
Using a shell commands in c++
Here’s a terminal command: Here’s my code: The above code, when run, returns this message: How can I place the ‘/’ symbol, for this command to work correctly? Answer Your problem is not in C++. You are invoking your command with popen, and popen runs your command in sh shell, that does not support <() syntax, while in your terminal