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/**
* @file llprocesslauncher_test.cpp
* @author Nat Goodspeed
* @date 2011-12-19
* @brief Test for llprocesslauncher.
*
* $LicenseInfo:firstyear=2011&license=viewerlgpl$
* Copyright (c) 2011, Linden Research, Inc.
* $/LicenseInfo$
*/
// Precompiled header
#include "linden_common.h"
// associated header
#define WIN32_LEAN_AND_MEAN
#include "llprocesslauncher.h"
// STL headers
#include <vector>
// std headers
#include <errno.h>
// external library headers
#include "llapr.h"
#include "apr_thread_proc.h"
#include "apr_file_io.h"
// other Linden headers
#include "../test/lltut.h"
#if defined(LL_WINDOWS)
#define sleep _sleep
#endif
class APR
{
public:
APR():
pool(NULL)
{
apr_initialize();
apr_pool_create(&pool, NULL);
}
~APR()
{
apr_terminate();
}
std::string strerror(apr_status_t rv)
{
char errbuf[256];
apr_strerror(rv, errbuf, sizeof(errbuf));
return errbuf;
}
apr_pool_t *pool;
};
/*****************************************************************************
* TUT
*****************************************************************************/
namespace tut
{
struct llprocesslauncher_data
{
void aprchk(apr_status_t rv)
{
ensure_equals(apr.strerror(rv), rv, APR_SUCCESS);
}
APR apr;
};
typedef test_group<llprocesslauncher_data> llprocesslauncher_group;
typedef llprocesslauncher_group::object object;
llprocesslauncher_group llprocesslaunchergrp("llprocesslauncher");
struct Item
{
Item(): tries(0) {}
unsigned tries;
std::string which;
std::string what;
};
template<> template<>
void object::test<1>()
{
set_test_name("raw APR nonblocking I/O");
// Create a script file in a temporary place.
const char* tempdir = NULL;
aprchk(apr_temp_dir_get(&tempdir, apr.pool));
// Construct a temp filename template in that directory.
char *tempname = NULL;
aprchk(apr_filepath_merge(&tempname, tempdir, "testXXXXXX", 0, apr.pool));
// Create a temp file from that template.
apr_file_t* fp = NULL;
aprchk(apr_file_mktemp(&fp, tempname, APR_CREATE | APR_WRITE | APR_EXCL, apr.pool));
// Write it.
const char script[] =
"import sys\n"
"import time\n"
"\n"
"time.sleep(2)\n"
"print >>sys.stdout, \"stdout after wait\"\n"
"sys.stdout.flush()\n"
"time.sleep(2)\n"
"print >>sys.stderr, \"stderr after wait\"\n"
"sys.stderr.flush()\n"
;
apr_size_t len(sizeof(script)-1);
aprchk(apr_file_write(fp, script, &len));
aprchk(apr_file_close(fp));
// Arrange to track the history of our interaction with child: what we
// fetched, which pipe it came from, how many tries it took before we
// got it.
std::vector<Item> history;
history.push_back(Item());
apr_procattr_t *procattr = NULL;
aprchk(apr_procattr_create(&procattr, apr.pool));
aprchk(apr_procattr_io_set(procattr, APR_CHILD_BLOCK, APR_CHILD_BLOCK, APR_CHILD_BLOCK));
aprchk(apr_procattr_cmdtype_set(procattr, APR_PROGRAM_PATH));
std::vector<const char*> argv;
apr_proc_t child;
argv.push_back("python");
argv.push_back(tempname);
argv.push_back(NULL);
aprchk(apr_proc_create(&child, argv[0],
static_cast<const char* const*>(&argv[0]),
NULL, // if we wanted to pass explicit environment
procattr,
apr.pool));
typedef std::pair<std::string, apr_file_t*> DescFile;
typedef std::vector<DescFile> DescFileVec;
DescFileVec outfiles;
outfiles.push_back(DescFile("out", child.out));
outfiles.push_back(DescFile("err", child.err));
while (! outfiles.empty())
{
DescFileVec iterfiles(outfiles);
for (size_t i = 0; i < iterfiles.size(); ++i)
{
char buf[4096];
apr_status_t rv = apr_file_gets(buf, sizeof(buf), iterfiles[i].second);
if (APR_STATUS_IS_EOF(rv))
{
// std::cout << "(EOF on " << iterfiles[i].first << ")\n";
history.back().which = iterfiles[i].first;
history.back().what = "*eof*";
history.push_back(Item());
outfiles.erase(outfiles.begin() + i);
continue;
}
if (rv == EWOULDBLOCK)
{
// std::cout << "(waiting; apr_file_gets(" << iterfiles[i].first << ") => " << rv << ": " << apr.strerror(rv) << ")\n";
++history.back().tries;
continue;
}
ensure_equals(rv, APR_SUCCESS);
// Is it even possible to get APR_SUCCESS but read 0 bytes?
// Hope not, but defend against that anyway.
if (buf[0])
{
// std::cout << iterfiles[i].first << ": " << buf;
history.back().which = iterfiles[i].first;
history.back().what.append(buf);
if (buf[strlen(buf) - 1] == '\n')
history.push_back(Item());
else
{
// Just for pretty output... if we only read a partial
// line, terminate it.
// std::cout << "...\n";
}
}
}
sleep(1);
}
apr_file_close(child.in);
apr_file_close(child.out);
apr_file_close(child.err);
int rc = 0;
apr_exit_why_e why;
apr_status_t rv;
while (! APR_STATUS_IS_CHILD_DONE(rv = apr_proc_wait(&child, &rc, &why, APR_NOWAIT)))
{
// std::cout << "child not done (" << rv << "): " << apr.strerror(rv) << '\n';
sleep(0.5);
}
// std::cout << "child done: rv = " << rv << " (" << apr.strerror(rv) << "), why = " << why << ", rc = " << rc << '\n';
ensure_equals(rv, APR_CHILD_DONE);
ensure_equals(why, APR_PROC_EXIT);
ensure_equals(rc, 0);
// Remove temp script file
aprchk(apr_file_remove(tempname, apr.pool));
// Beyond merely executing all the above successfully, verify that we
// obtained expected output -- and that we duly got control while
// waiting, proving the non-blocking nature of these pipes.
ensure("blocking I/O on child pipe (0)", history[0].tries);
ensure_equals(history[0].which, "out");
ensure_equals(history[0].what, "stdout after wait\n");
ensure("blocking I/O on child pipe (1)", history[1].tries);
ensure_equals(history[1].which, "out");
ensure_equals(history[1].what, "*eof*");
ensure_equals(history[2].which, "err");
ensure_equals(history[2].what, "stderr after wait\n");
ensure_equals(history[3].which, "err");
ensure_equals(history[3].what, "*eof*");
}
} // namespace tut
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