This is my program:
#include "fcgi_stdio.h"
#include <stdlib.h>
int main(){
while (FCGI_Accept() >= 0){
FCGI_printf("Content-Type:text/html\r\n\r\n");
FCGI_printf("<h1>Test</h1>\n");
}
return 0;
}
These are the options I added to the apache config for the virtual host I'm working with:
SetHandler fastcgi-script
Options +ExecCGI
I also have the following line in the same apache config file:
LoadModule fastcgi_module modules/mod_fastcgi.so
I followed directions at FastCGI script can't find libfcgi.so.0 in Apache 2.4.6 and mod_fastcgi to compile my program.
If I execute the compiled program directly, I receive the familiar "segmentation fault" on screen. When I try executing it via the server at http://127.0.0.1/a.out, I get an internal server error and the following in the error_log:
[Tue Nov 17 00:48:10 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" started (pid 9331)
[Tue Nov 17 00:48:10 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" (pid 9331) terminated due to uncaught signal '11' (Segmentation fault)
[Tue Nov 17 00:48:15 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" restarted (pid 9333)
[Tue Nov 17 00:48:15 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" (pid 9333) terminated due to uncaught signal '11' (Segmentation fault)
[Tue Nov 17 00:48:20 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" restarted (pid 9334)
[Tue Nov 17 00:48:20 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" (pid 9334) terminated due to uncaught signal '11' (Segmentation fault)
[Tue Nov 17 00:48:25 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" restarted (pid 9335)
[Tue Nov 17 00:48:25 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" (pid 9335) terminated due to uncaught signal '11' (Segmentation fault)
[Tue Nov 17 00:48:25 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:26 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:29 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:32 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:35 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:38 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:41 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:44 2015] [error] [client 127.0.0.1] FastCGI: comm with (dynamic) server "/usr/local/apache2/virt1/a.out" aborted: (first read) idle timeout (30 sec)
[Tue Nov 17 00:48:44 2015] [error] [client 127.0.0.1] FastCGI: incomplete headers (0 bytes) received from server "/usr/local/apache2/virt1/a.out"
[Tue Nov 17 00:48:44 2015] [warn] FastCGI: (dynamic) server "/usr/local/apache2/virt1/a.out" has failed to remain running for 30 seconds given 3 attempts, its restart interval has been backed off to 600 seconds
[Tue Nov 17 00:48:44 2015] [error] [client 127.0.0.1] (2)No such file or directory: FastCGI: stat() of "/usr/local/apache2/virt1/favicon.ico" failed
Its basically telling me that apache is attempting to start the program a few times but the program returns segmentation fault.
The result I was expecting was the word Test in bold in a web browser.
How do I fix my program to make it compatible with fast-cgi so that I can execute it via a web browser?
I don't want to resort to the slow CGI interface which is why I'm trying to use functions beginning with FCGI.
