sh-4.3$ gdb --version
GNU gdb (GDB) 7.10
sh-4.3$ systemsettings5 --version
systemsettings 5.4.3

sh-4.3$ pacman -Qi plasma-workspace
Название              : plasma-workspace
Версия                : 5.4.3-1
Описание              : KDE Plasma Workspace

sh-4.3$ qtcreator -version 

Qt Creator 3.5.1 based on Qt 5.5.1

ps ax o pid,ppid,command | grep gpg | grep -v grep                                                             
 1173     1 gpg-agent --homedir /home/pasha/.gnupg --use-standard-socket --daemon

 1075  1045 /usr/bin/kwalletd5 --pam-login 15 18
 1076  1045 [kwalletd] <defunct>
 1537  1046 /usr/bin/kwalletd5
 8118     1 kdeinit4: kwalletd [kdeinit]

alias git='mycmd git'

mycmd

#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <iostream>
/* Execute the command using this shell program.  */
#define SHELL "/bin/sh"
using namespace std;

int
my_system ()
{
  int status;
  pid_t pid;
 int p[2];
  pipe(p);
  pid = fork ();


  if (pid == 0)
    { //Read
      close(p[1]);
      close(STDIN_FILENO);
      /* This is the child process.  Execute the shell command. */
      dup2(p[0], STDIN_FILENO);

      string str;
      cin >> str;
      execl (SHELL, SHELL, "-c", str.c_str(), NULL);
      _exit (EXIT_FAILURE);
      close(p[0]);
    }
  else if (pid < 0)
    /* The fork failed.  Report failure.  */
    status = -1;
  else
    {
      close(p[0]);
      close(STDOUT_FILENO);
      dup2(p[1], STDOUT_FILENO);
      // close(p[1]);
      string s;
      getline(cin, s);
      cout << s;
      close(STDOUT_FILENO);

    /* This is the parent process.  Wait for the child to complete.  */
      //    if (waitpid (pid, &status, 0) != pid)
      //      status = -1;

    }
  return status;
}

int main()
{
  my_system();
}

**** List of CAPTURE Hardware Devices ****
card 1: C920 [HD Pro Webcam C920], device 0: USB Audio [USB Audio]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 2: PCH [HDA Intel PCH], device 0: VT1708S Analog [VT1708S Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

  index: 1
        name: <alsa_input.usb-046d_HD_Pro_Webcam_C920_63D5B7BF-02.analog-stereo>
        driver: <module-alsa-card.c>
        flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
        state: RUNNING
        suspend cause: 
        priority: 9049
        volume: front-left: 64075 /  98% / -0,59 dB,   front-right: 64075 /  98% / -0,59 dB
                balance 0,00
        base volume: 9619 /  15% / -50,00 dB
        volume steps: 65537
        muted: no
        current latency: 0,08 ms
        max rewind: 0 KiB
        sample spec: s16le 2-канальный 3200
        channel map: front-left,front-right
                     Стерео
        used by: 1
        linked by: 1
        fixed latency: 99,94 ms
        card: 1 <alsa_card.usb-046d_HD_Pro_Webcam_C920_63D5B7BF-02>
        module: 7
        properties:
                alsa.resolution_bits = "16"
                device.api = "alsa"
                device.class = "sound"
                alsa.class = "generic"
                alsa.subclass = "generic-mix"
                alsa.name = "USB Audio"
                alsa.id = "USB Audio"
                alsa.subdevice = "0"
                alsa.subdevice_name = "subdevice #0"
                alsa.device = "0"
                alsa.card = "1"
                alsa.card_name = "HD Pro Webcam C920"
                alsa.long_card_name = "HD Pro Webcam C920 at usb-0000:00:14.0-3.3, high speed"
                alsa.driver_name = "snd_usb_audio"
                device.bus_path = "pci-0000:00:14.0-usb-0:3.3:1.2"
                sysfs.path = "/devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3.3/3-3.3:1.2/sound/card1"
                udev.id = "usb-046d_HD_Pro_Webcam_C920_63D5B7BF-02"
                device.bus = "usb"
                device.vendor.id = "046d"
                device.vendor.name = "Logitech, Inc."
                device.product.id = "082d"
                device.product.name = "HD Pro Webcam C920"
                device.serial = "046d_HD_Pro_Webcam_C920_63D5B7BF"
                device.form_factor = "webcam"
                device.string = "front:1"
                device.buffering.buffer_size = "12792"
                device.buffering.fragment_size = "3196"
                device.access_mode = "mmap"
                device.profile.name = "analog-stereo"
                device.profile.description = "Аналоговый стерео"
                device.description = "HD Pro Webcam C920 Аналоговый стерео"
                alsa.mixer_name = "USB Mixer"
                alsa.components = "USB046d:082d"
                module-udev-detect.discovered = "1"
                device.icon_name = "camera-web-usb"
        ports:
                analog-input-mic: Микрофон (priority 8700, latency offset 0 usec, available: unknown)
                        properties:
                                device.icon_name = "audio-input-microphone"
        active port: <analog-input-mic>

nvidia_frontend_open: minor 0, module->open() failed, error -5