libproc.h
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/* akvirtualcamera, virtual camera for Mac and Windows.
* Copyright (C) 2024 Gonzalo Exequiel Pedone
*
* akvirtualcamera is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* akvirtualcamera 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with akvirtualcamera. If not, see <http://www.gnu.org/licenses/>.
*
* Web-Site: http://webcamoid.github.io/
*/
#ifndef LIBPROC_H
#define LIBPROC_H
#include <algorithm>
#include <cstdint>
#include <cstring>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "PlatformUtils/src/utils.h"
int proc_listallpids(void *buffer, size_t buffersize)
{
auto dir = opendir("/proc");
if (buffer && buffersize > 0)
memset(buffer, 0, buffersize);
if (!dir)
return 0;
std::vector<pid_t> pids;
for (;;) {
auto entry = readdir(dir);
if (!entry)
break;
if (strncmp(entry->d_name, ".", 256) == 0
|| strncmp(entry->d_name, "..", 256) == 0
|| entry->d_type != DT_DIR) {
continue;
}
auto isNumber = std::all_of(entry->d_name,
entry->d_name + strnlen(entry->d_name, 256),
[] (char c) -> bool {
return isdigit(c);
});
if (!isNumber)
continue;
pid_t pid = atoi(entry->d_name);
char procExePath[4096];
snprintf(procExePath, 4096, "/proc/%d/exe", pid);
if (AkVCam::realPath(procExePath).empty())
continue;
pids.push_back(pid);
}
closedir(dir);
if (buffer && buffersize > 0)
memcpy(buffer, pids.data(), std::min(pids.size() * sizeof(pid_t), buffersize));
return pids.size();
}
inline void proc_pidpath(uint64_t pid, char *path, size_t size)
{
char procPath[4096];
snprintf(procPath, 4096, "/proc/%d/exe", pid);
auto procRealPath = AkVCam::realPath(procPath);
snprintf(path, size, "%s", procRealPath.c_str());
}
#endif // LIBPROC_H