I have a Perl script running in an AIX box. The script tries to open a file from a certain directory and it fails to read the file because file has no read permission, but I get a different error...

I'm running a self-hosted Renovate instance and I need to sign the commits to GitLab with GPG key. For this I'm setting the env variable RENOVATE_GIT_PRIVATE_KEY with the PGP private key block for ...

I am using a rails webapp and trying to send an xml file to a sftp server, using the following script: Net::SSH.start(SFTP_HOST, sftp_user, {:port => SFTP_PORT, :password => sftp_password}) d...

I have a large application that I am checking for memory leaks. I am using valgrind with the options --leak-check=yes --track-origins=yes. A sample of the warning: ==2173== Warning: noted but unha...

I am trying build a VPN client mobile for Android based applications that connect to virtual infrastructure over VPN tunnel. I have a similar application for Linux/Windows and I know how to open a ...

I've been running a python script inside a virtual environment that I create with pipenv shell, it worked well. I've always run the process from a bash script that changes directory to the folder c...

Till date my googling and checking out of msdn suggests Microsoft Windows does not offer any equivalent of TIOCOUTQ / SIOCOUTQ to find the amount of unsent data in the socket send buffer. It will b...

Let's say I'm running a program called IpAddresses.c. I want that program to get all IP addresses this device has according to each interface. Just like ifconfig. How can I do that? I don't know m...

I am using the following code to retrieve all MAC addresses for current computer: ifreq ifr; ifconf ifc; char buf[1024]; int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); if (sock == -1) { ... ...

I am trying to call DeviceIO functions asynchronously by using the OVERLAPPED structure as described on MSDN. I am using the FSCTL_ENUM_USN_DATA control code to enumerate the MFT of NTFS drives but...

I want to generate a beep sound with a specific frequency and length (for different sound signals) using the system beeper (and only the speakers if beeper is not available / accessible). I know it...

I am trying to port bit of raspberrypi's userspace code from C to golang and I've run into a program involving ioctl(). I am having trouble specifically with following C code #define MAJOR_NUM 1...

Is it possible to detect when a laptop's lid is open or closed? From what I've read, this isn't possible, but SO has helped me with the impossible before. The only thing I've found that might be in...

I am trying to write an application in C++ which lists Information obtained from a USB device. I am following USBView (Github) utility's code for it. When device is in D0 power state (fully powere...

I seem tangled between different abstractions on the USB stack.. what is the difference betweeen IOCTL_USB_RESET and USBDEVFS_RESET fired against an USB device? Will both calls finally trigger the ...

I'm new to node and am hacking together a node application utilizing node_pcap to capture packet data and do interesting things with it. One of the inputs to capturing data is the network interface...

I want to send an IOCTL command to a PC/SC reader connected to my computer (win7 64 bit). In order to send an IOCTL command I need a HANDLE to the device, which I'm unable to create. The device is...

Here is the code I am using to print the resolution in pixels of the current terminal. #include <sys/ioctl.h> #include <stdio.h> #include <unistd.h> int main (int argc, char *ar...

Title pretty much says it all. If I run ifconfig, I get this: eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet -snip- netmask 255.255.255.0 broadcast -snip- ... Using this,...

I'm writing a driver to control some custom hardware. In the old days (i.e. 15yrs ago) I was doing this with ioctls, but am now digging into sysfs as a possible alternative. As I understand it, ...

I have (out of curiosity) been wondering where the user space wrapper for the ioctl system call is defined on x86_64 Linux. My first thought was glibc - after checking the exposed symbols on the in...

According to man ioctl, opening file descriptors with open may cause unwanted side-effects. The manual also states that opening with O_NONBLOCK solves those unwanted issues but I can't seem to find...

i was going through ioctl sample programs to check how it communicates with kernel space. in program WRITE_IOCTL is used as command #define WRITE_IOCTL _IOW(MY_MACIG, 1, int) ioctl(fd, WRITE_IOCT...

I have a device which generates some noise that I want to add to the entropy pool for the /dev/random device in an embedded Linux system. I'm reading the man page on /dev/random and I don't really...

As far I researched, terminfo/termcap and ioctl don't allow to query character at (x,y) position on terminal's screen. This is rather unexpected, because: one can read e.g. screen dimensions from...