Merge "adb: Mask SIGTTIN so that I/O works when backgrounded."

#include <base/strings.h>

#if !defined(_WIN32)

#include <signal.h>

#include <termios.h>

#include <unistd.h>

#endif

    adb_thread_setname("stdin reader");

#ifndef __WIN32

    // Mask SIGTTIN in case we're in a backgrounded process

    sigset_t sigset;

    sigemptyset(&sigset);

    sigaddset(&sigset, SIGTTIN);

    pthread_sigmask(SIG_BLOCK, &sigset, nullptr);

#endif

    char raw_buffer[1024];

    char* buffer_ptr = raw_buffer;

    size_t buffer_size = sizeof(raw_buffer);