LKBEN11062: Posix error 4: Interrupted system call


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LKB | Created: 02/04/2020 | Version: 0 | Language: EN | Rating: 0 | Outdated: False | Marked for deletion: False

Author: Wim Peeters - Keskon GmbH & Co. KG


Symptom

You get the error message: Interrupted system call

Cause

none

Solution

This error can occur when programming in C/C++ or even from a bash shell. What happens is that a system call is interrupted. This is most of the time due to a siginterrupt fuction. (default behaviour on BSD)

The siginterrupt() function (defined in #include <signal.h> supports programs written to historical system interfaces. A conforming application, when being written or rewritten, should use sigaction() with the SA_RESTART flag instead of siginterrupt().

Definition:

int siginterrupt(int sig, int flag);

Depending on the flag, the system call will be restarted or not.

About the Author

Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.

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