Robin Davies
146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
// Copyright (c) 2022 Robin Davies
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
// this software and associated documentation files (the "Software"), to deal in
|
|
// the Software without restriction, including without limitation the rights to
|
|
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
// the Software, and to permit persons to whom the Software is furnished to do so,
|
|
// subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
#include "pch.h"
|
|
#include "SysExec.hpp"
|
|
#include <sys/wait.h>
|
|
#include <filesystem>
|
|
#include "PiPedalException.hpp"
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <linux/limits.h> // for PATH_MAX
|
|
|
|
using namespace pipedal;
|
|
using namespace std;
|
|
|
|
#pragma GCC diagnostic ignored "-Wunused-result"
|
|
|
|
// find on path, but ONLY /usr/bin and /usr/sbin
|
|
|
|
|
|
static std::filesystem::path findOnSystemPath(const std::string &command)
|
|
{
|
|
if (command.length() != 0 && command[0] == '/')
|
|
{
|
|
return command;
|
|
}
|
|
std::string path = "/usr/bin:/usr/sbin";
|
|
std::vector<std::string> paths;
|
|
size_t t = 0;
|
|
while (t < path.length())
|
|
{
|
|
size_t pos = path.find(':', t);
|
|
if (pos == string::npos)
|
|
{
|
|
pos = path.length();
|
|
}
|
|
std::string thisPath = path.substr(t, pos - t);
|
|
std::filesystem::path path = std::filesystem::path(thisPath) / command;
|
|
if (std::filesystem::exists(path))
|
|
{
|
|
return path;
|
|
}
|
|
t = pos + 1;
|
|
}
|
|
std::stringstream s;
|
|
s << "'" << command << "' is not installed.";
|
|
throw PiPedalException(s.str());
|
|
}
|
|
|
|
int pipedal::silentSysExec(const char *szCommand)
|
|
{
|
|
std::stringstream s;
|
|
s << szCommand << " 2>&1";
|
|
|
|
FILE *output = popen(s.str().c_str(), "r");
|
|
char buffer[512];
|
|
if (output)
|
|
{
|
|
while (!feof(output))
|
|
{
|
|
fgets(buffer, sizeof(buffer), output);
|
|
}
|
|
return pclose(output);
|
|
}
|
|
return -1;
|
|
}
|
|
int pipedal::sysExec(const char *szCommand)
|
|
{
|
|
char *args = strdup(szCommand);
|
|
int argc;
|
|
std::vector<char *> argv;
|
|
|
|
char *p = args;
|
|
while (*p)
|
|
{
|
|
argv.push_back(p);
|
|
|
|
while (*p && *p != ' ')
|
|
{
|
|
++p;
|
|
}
|
|
if (*p)
|
|
{
|
|
*p++ = '\0';
|
|
while (*p && *p == ' ')
|
|
{
|
|
++p;
|
|
}
|
|
}
|
|
}
|
|
argv.push_back(nullptr);
|
|
|
|
std::filesystem::path execPath = argv[0];
|
|
if (execPath.is_relative())
|
|
{
|
|
execPath = findOnSystemPath(execPath);
|
|
}
|
|
if (!std::filesystem::exists(execPath))
|
|
{
|
|
throw PiPedalException(SS("Path does not exist: " << execPath << "."));
|
|
}
|
|
argv[0] = (char *)(execPath.c_str());
|
|
|
|
char **rawArgv = &argv[0];
|
|
int pbPid;
|
|
int returnValue = 0;
|
|
|
|
if ((pbPid = fork()) == 0)
|
|
{
|
|
execv(argv[0], rawArgv);
|
|
exit(-1);
|
|
}
|
|
else
|
|
{
|
|
free((void *)args);
|
|
waitpid(pbPid, &returnValue, 0);
|
|
int exitStatus = WEXITSTATUS(returnValue);
|
|
return exitStatus;
|
|
}
|
|
}
|
|
|
|
|
|
std::string pipedal::getSelfExePath()
|
|
{
|
|
char result[PATH_MAX+1];
|
|
ssize_t count = readlink("/proc/self/exe", result, PATH_MAX);
|
|
if (count < 0) throw PiPedalException("Can't find EXE path.");
|
|
result[count] = 0;
|
|
return result;
|
|
} |