How can I tell in Linux which process sent my process a signal

by

Two Linux-specific methods are SA_SIGINFO and signalfd(), which allows programs to receive very detailed information about signals sent, including the sender’s PID.

  • Call sigaction() and pass to it a struct sigaction which has the desired signal handler in sa_sigaction and the SA_SIGINFO flag in sa_flags set. With this flag, your signal handler will receive three arguments, one of which is a siginfo_t structure containing the sender’s PID and UID.

  • Call signalfd() and read signalfd_siginfo structures from it (usually in some kind of a select/poll loop). The contents will be similar to siginfo_t.

Which one to use depends on how your application is written; they probably won’t work well outside plain C, and I wouldn’t have any hope of getting them work in Java. They are also unportable outside Linux. They also likely are the Very Wrong Way of doing what you are trying to achieve.

More Related Contents:

  1. What’s the best way to send a signal to all members of a process group?
  2. What killed my process and why?
  3. Handling multiple SIGCHLD
  4. Why can’t capture SIGSEGV using signalfd?
  5. SIGKILL signal Handler
  6. Can you run GUI applications in a Linux Docker container?
  7. sed command with -i option failing on Mac, but works on Linux
  8. Tool to trace local function calls in Linux
  9. How to permanently export a variable in Linux?
  10. How do I use the lines of a file as arguments of a command?
  11. Bash script: bad interpreter
  12. How to insert a text at the beginning of a file?
  13. Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
  14. How do I deal with a filename that starts with the hyphen (-) character?
  15. “No such file or directory” error when executing a binary
  16. GROUP BY/SUM from shell
  17. How to reset Jenkins security settings from the command line?
  18. How can I run a function from a script in command line?
  19. Add file extension to files with bash
  20. Number of executed Instructions different for Hello World program Nasm Assembly and C
  21. How to print third column to last column?
  22. Git and hard links
  23. Running a self-contained ASP.NET Core application on Ubuntu
  24. How can I remove the BOM from a UTF-8 file? [duplicate]
  25. How to search contents of multiple pdf files?
  26. What is the difference between double-ampersand (&&) and semicolon (;) in Linux Bash?
  27. ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known [closed]
  28. What is path //, how is it different from /
  29. prevent linux thread from being interrupted by scheduler
  30. How do you filter out all unique lines in a file?

Leave a Comment