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/*
Gordon's Text-Utilities Library
Copyright (C) 2009-2013 Assaf Gordon (assafgordon@gmail.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#include <vector>
#include <map>
#include <string>
#include <iostream>
#include <fstream>
#include <err.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <gtextutils/inbuf1.hpp>
#include <gtextutils/outbuf3.hpp>
#include "tests_assertion.h"
/*
* Test for File-Descriptor-based input and output buffers, through a system pipe.
*/
using namespace std;
int fork_pipe_command ( const char* program, const char* output_filename)
{
int fd;
pid_t child_pid;
int parent_pipe[2];
if (pipe(parent_pipe)!=0)
err(1,"pipe (for gzip) failed");
child_pid = fork();
if (child_pid>0) {
/* The parent process */
fd = parent_pipe[1];
close(parent_pipe[0]);
return fd;
}
/* The child process */
//the compressor's STDIN is the pipe from the parent
dup2(parent_pipe[0], STDIN_FILENO);
close(parent_pipe[1]);
//the compressor's STDOUT is the output file
//(which can be the parent's STDOUT, too)
fd = open(output_filename, O_WRONLY | O_CREAT, 0666 );
if (fd==-1)
err(1,"Failed to open output '%s'", output_filename);
dup2(fd, STDOUT_FILENO);
//Run GZIP
execlp(program,program,"-f",NULL);
//Should never get here...
err(1,"execlp(%s) failed",program);
}
void test_compress_output()
{
int pipe_out_fd = fork_pipe_command ( "gzip", "fdout.txt.gz" ) ;
josuttis_fdostream out(pipe_out_fd);
out << "first line" << endl;
out << "second line" << endl;
out << "third line" << endl;
close(pipe_out_fd);
}
int main()
{
test_compress_output();
}
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