cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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channel-command.h (2761B)

      1/*
      2 * QEMU I/O channels external command driver
      3 *
      4 * Copyright (c) 2015 Red Hat, Inc.
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 *
     19 */
     20
     21#ifndef QIO_CHANNEL_COMMAND_H
     22#define QIO_CHANNEL_COMMAND_H
     23
     24#include "io/channel.h"
     25#include "qom/object.h"
     26
     27#define TYPE_QIO_CHANNEL_COMMAND "qio-channel-command"
     28OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelCommand, QIO_CHANNEL_COMMAND)
     29
     30
     31
     32/**
     33 * QIOChannelCommand:
     34 *
     35 * The QIOChannelCommand class provides a channel implementation
     36 * that can transport data with an externally running command
     37 * via its stdio streams.
     38 */
     39
     40struct QIOChannelCommand {
     41    QIOChannel parent;
     42    int writefd;
     43    int readfd;
     44    pid_t pid;
     45};
     46
     47
     48/**
     49 * qio_channel_command_new_pid:
     50 * @writefd: the FD connected to the command's stdin
     51 * @readfd: the FD connected to the command's stdout
     52 * @pid: the PID of the running child command
     53 * @errp: pointer to a NULL-initialized error object
     54 *
     55 * Create a channel for performing I/O with the
     56 * previously spawned command identified by @pid.
     57 * The two file descriptors provide the connection
     58 * to command's stdio streams, either one or which
     59 * may be -1 to indicate that stream is not open.
     60 *
     61 * The channel will take ownership of the process
     62 * @pid and will kill it when closing the channel.
     63 * Similarly it will take responsibility for
     64 * closing the file descriptors @writefd and @readfd.
     65 *
     66 * Returns: the command channel object, or NULL on error
     67 */
     68QIOChannelCommand *
     69qio_channel_command_new_pid(int writefd,
     70                            int readfd,
     71                            pid_t pid);
     72
     73/**
     74 * qio_channel_command_new_spawn:
     75 * @argv: the NULL terminated list of command arguments
     76 * @flags: the I/O mode, one of O_RDONLY, O_WRONLY, O_RDWR
     77 * @errp: pointer to a NULL-initialized error object
     78 *
     79 * Create a channel for performing I/O with the
     80 * command to be spawned with arguments @argv.
     81 *
     82 * Returns: the command channel object, or NULL on error
     83 */
     84QIOChannelCommand *
     85qio_channel_command_new_spawn(const char *const argv[],
     86                              int flags,
     87                              Error **errp);
     88
     89
     90#endif /* QIO_CHANNEL_COMMAND_H */