SigFn

Bind callback functions to OS signals in C and C++.

Requirements

SigFn has the following requirements:

• C++11
• CMake >= 3.10

Building

SigFn can be built in a few steps using cmake.

CMake Configuration and Build

A standard build will provide the shared and static libraries:

cmake -S . -B build
cmake --build build

A few optional flags can be specified in the configuration:

• SIGFN_TESTS: Build unit tests
• SIGFN_COVER: Evaluate code coverage(requires SIGFN_TESTS, not supported on Windows)
• SIGFN_EXAMPLES: Build SigFn C and C++ examples
• SIGFN_DOCS: Build documentation using DOXYGEN

Running Unit Tests

The unit tests can be built and run using the following commands:

cmake -S . -B build -DSIGFN_TESTS=ON
cmake --build build
cd build
ctest -C Debug

Usage

SigFn provides sigfn.h and sigfn.hpp for usage with C and C++, respectively.

C

Basic SigFn usage in C. It is copied from pause.c in the examples directory.

#include <sigfn.h>
#include <stdio.h>
 
int main(int argc, const char **argv)
{
    // signal number to wait for
    const int signum = SIGINT;
 
    // used to store signum
    int received;
 
    // notify user that the program is "paused"
    puts("Paused. Press Ctrl+C to exit.");
 
    // pause main thread execution until SIGINT is received
    sigfn_wait(&signum, 1, &received);
 
    // notify user that flag was set and exit cleanly
    printf("\nReceived signal: %d\n", received);
 
    return 0;
}

C++

Basic SigFn usage in C++. It is copied from pause.cpp in the examples directory.

 ++
#include <sigfn.hpp>
#include <iostream>
 
int main(int argc, const char **argv)
{
    // notify user that the program is "paused"
    std::cout << "Paused. Press Ctrl+C to exit." << std::endl;
    
    sigfn::wait({SIGINT});
 
    std::cout << std::endl << "Received signal: SIGINT" << std::endl;
 
    return 0;
}