pkill not working in system() command

Asked Apr 23 '18 at 10:15

Active Apr 23 '18 at 10:27

Viewed 1,005 times

I am trying to kill a process in a C++ program (Linux). I know exactly the name of the program to kill. If I try in Bash

pkill process-name

the process is killed normally.

If in a simple C++ program I run in main

system("pkill process-name")

the process continues to run.

I have no idea why...

edited Apr 23 '18 at 10:27

Melebius

asked Apr 23 '18 at 10:15

Talkanian

Does `process-name` contain something 'weird', e.g. regex? – Marco A. Apr 23 '18 at 10:23
its called mtc-serial-communication – Talkanian Apr 23 '18 at 10:27
What is the exit code of `system()`? – Khouri Giordano Apr 23 '18 at 11:28
does your c++ program have the right permission to kill the other process? Have you tried running your program with sudo and see if it works? – Ehsan Enayati Apr 23 '18 at 12:35
@KhouriGiordano the exit code is 256 – Talkanian Apr 23 '18 at 13:00
You can consider the return of `system()` the same as `waitpid()` and use macros to break it down: http://man7.org/linux/man-pages/man2/waitpid.2.html – Khouri Giordano Apr 23 '18 at 13:04
@EhsanEnayati The program is launched on a board wich runs a linux distribution made with the yocto project, and doesn't needs sudo to get rights – Talkanian Apr 23 '18 at 13:05
@KhouriGiordano Sorry, what you mean with "use macros to break it down?" can you give me more details as an answer please? – Talkanian Apr 23 '18 at 13:21
@Talkanian `if (WIFEXITED(val)) printf("exit code: %d\n",WEXITSTATUS(val));` There's also a test for signaled i.e. crashes. – Khouri Giordano Apr 23 '18 at 15:43

0 Answers0