b5d9e433
 Peter M. Groen
Fixed License Hea...
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/* ****************************************************************************
* Copyright 2019 Open Systems Development BV *
* *
* 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. *
* ***************************************************************************/
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51becbde
Peter M. Groen
Committed the ent...
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#include "utils.h"
// std
#include <libgen.h>
#include <unistd.h>
#include <sstream>
#include <linux/limits.h>
using namespace osdev::components::mqtt;
std::string getPathToBinary(int pid)
{
static const int sMaxPath = PATH_MAX;
pid_t p = pid;
if (-1 == pid)
{
p = getpid();
}
std::ostringstream oss;
oss << "/proc/" << p << "/exe";
char buf[sMaxPath] = { 0 };
ssize_t r = readlink(oss.str().c_str(), buf, sMaxPath);
if (-1 == r)
{
// "readlink failed"
}
if (r >= sMaxPath)
{
buf[sMaxPath - 1] = '\0'; // make the buffer 0 terminated
// "path is too long"
}
return dirname(buf);
}
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