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@@ -1,114 +1,114 b'' | |||
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1 | 1 | // Copyright 2018 Yuya Nishihara <yuya@tcha.org> |
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2 | 2 | // |
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3 | 3 | // This software may be used and distributed according to the terms of the |
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4 | 4 | // GNU General Public License version 2 or any later version. |
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5 | 5 | |
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6 | 6 | //! Functions to send client-side fds over the command server channel. |
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7 | 7 | |
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8 | 8 | use futures::{try_ready, Async, Future, Poll}; |
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9 | 9 | use std::io; |
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10 | 10 | use std::os::unix::io::AsRawFd; |
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11 | 11 | use tokio_hglib::codec::ChannelMessage; |
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12 | 12 | use tokio_hglib::protocol::MessageLoop; |
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13 | 13 | use tokio_hglib::{Client, Connection}; |
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14 | 14 | |
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15 |
use |
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16 |
use |
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15 | use crate::message; | |
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16 | use crate::procutil; | |
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17 | 17 | |
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18 | 18 | /// Future to send client-side fds over the command server channel. |
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19 | 19 | /// |
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20 | 20 | /// This works as follows: |
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21 | 21 | /// 1. Client sends "attachio" request. |
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22 | 22 | /// 2. Server sends back 1-byte input request. |
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23 | 23 | /// 3. Client sends fds with 1-byte dummy payload in response. |
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24 | 24 | /// 4. Server returns the number of the fds received. |
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25 | 25 | /// |
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26 | 26 | /// If the stderr is omitted, it will be redirected to the stdout. This |
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27 | 27 | /// allows us to attach the pager stdin to both stdout and stderr, and |
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28 | 28 | /// dispose of the client-side handle once attached. |
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29 | 29 | #[must_use = "futures do nothing unless polled"] |
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30 | 30 | pub struct AttachIo<C, I, O, E> |
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31 | 31 | where |
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32 | 32 | C: Connection, |
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33 | 33 | { |
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34 | 34 | msg_loop: MessageLoop<C>, |
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35 | 35 | stdin: I, |
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36 | 36 | stdout: O, |
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37 | 37 | stderr: Option<E>, |
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38 | 38 | } |
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39 | 39 | |
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40 | 40 | impl<C, I, O, E> AttachIo<C, I, O, E> |
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41 | 41 | where |
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42 | 42 | C: Connection + AsRawFd, |
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43 | 43 | I: AsRawFd, |
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44 | 44 | O: AsRawFd, |
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45 | 45 | E: AsRawFd, |
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46 | 46 | { |
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47 | 47 | pub fn with_client( |
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48 | 48 | client: Client<C>, |
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49 | 49 | stdin: I, |
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50 | 50 | stdout: O, |
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51 | 51 | stderr: Option<E>, |
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52 | 52 | ) -> AttachIo<C, I, O, E> { |
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53 | 53 | let msg_loop = MessageLoop::start(client, b"attachio"); |
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54 | 54 | AttachIo { |
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55 | 55 | msg_loop, |
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56 | 56 | stdin, |
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57 | 57 | stdout, |
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58 | 58 | stderr, |
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59 | 59 | } |
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60 | 60 | } |
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61 | 61 | } |
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62 | 62 | |
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63 | 63 | impl<C, I, O, E> Future for AttachIo<C, I, O, E> |
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64 | 64 | where |
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65 | 65 | C: Connection + AsRawFd, |
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66 | 66 | I: AsRawFd, |
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67 | 67 | O: AsRawFd, |
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68 | 68 | E: AsRawFd, |
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69 | 69 | { |
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70 | 70 | type Item = Client<C>; |
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71 | 71 | type Error = io::Error; |
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72 | 72 | |
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73 | 73 | fn poll(&mut self) -> Poll<Self::Item, Self::Error> { |
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74 | 74 | loop { |
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75 | 75 | let (client, msg) = try_ready!(self.msg_loop.poll()); |
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76 | 76 | match msg { |
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77 | 77 | ChannelMessage::Data(b'r', data) => { |
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78 | 78 | let fd_cnt = message::parse_result_code(data)?; |
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79 | 79 | if fd_cnt == 3 { |
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80 | 80 | return Ok(Async::Ready(client)); |
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81 | 81 | } else { |
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82 | 82 | return Err(io::Error::new( |
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83 | 83 | io::ErrorKind::InvalidData, |
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84 | 84 | "unexpected attachio result", |
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85 | 85 | )); |
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86 | 86 | } |
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87 | 87 | } |
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88 | 88 | ChannelMessage::Data(..) => { |
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89 | 89 | // just ignore data sent to uninteresting (optional) channel |
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90 | 90 | self.msg_loop = MessageLoop::resume(client); |
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91 | 91 | } |
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92 | 92 | ChannelMessage::InputRequest(1) => { |
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93 | 93 | // this may fail with EWOULDBLOCK in theory, but the |
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94 | 94 | // payload is quite small, and the send buffer should |
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95 | 95 | // be empty so the operation will complete immediately |
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96 | 96 | let sock_fd = client.as_raw_fd(); |
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97 | 97 | let ifd = self.stdin.as_raw_fd(); |
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98 | 98 | let ofd = self.stdout.as_raw_fd(); |
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99 | 99 | let efd = self.stderr.as_ref().map_or(ofd, |f| f.as_raw_fd()); |
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100 | 100 | procutil::send_raw_fds(sock_fd, &[ifd, ofd, efd])?; |
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101 | 101 | self.msg_loop = MessageLoop::resume(client); |
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102 | 102 | } |
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103 | 103 | ChannelMessage::InputRequest(..) |
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104 | 104 | | ChannelMessage::LineRequest(..) |
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105 | 105 | | ChannelMessage::SystemRequest(..) => { |
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106 | 106 | return Err(io::Error::new( |
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107 | 107 | io::ErrorKind::InvalidData, |
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108 | 108 | "unsupported request while attaching io", |
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109 | 109 | )); |
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110 | 110 | } |
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111 | 111 | } |
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112 | 112 | } |
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113 | 113 | } |
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114 | 114 | } |
@@ -1,136 +1,136 b'' | |||
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1 | 1 | // Copyright 2018 Yuya Nishihara <yuya@tcha.org> |
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2 | 2 | // |
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3 | 3 | // This software may be used and distributed according to the terms of the |
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4 | 4 | // GNU General Public License version 2 or any later version. |
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5 | 5 | |
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6 | 6 | //! cHg extensions to command server client. |
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7 | 7 | |
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8 | 8 | use bytes::{BufMut, Bytes, BytesMut}; |
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9 | 9 | use std::ffi::OsStr; |
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10 | 10 | use std::io; |
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11 | 11 | use std::mem; |
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12 | 12 | use std::os::unix::ffi::OsStrExt; |
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13 | 13 | use std::os::unix::io::AsRawFd; |
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14 | 14 | use std::path::Path; |
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15 | 15 | use tokio_hglib::protocol::{OneShotQuery, OneShotRequest}; |
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16 | 16 | use tokio_hglib::{Client, Connection}; |
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17 | 17 | |
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18 |
use |
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19 |
use |
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20 |
use |
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21 |
use |
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18 | use crate::attachio::AttachIo; | |
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19 | use crate::message::{self, Instruction}; | |
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20 | use crate::runcommand::ChgRunCommand; | |
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21 | use crate::uihandler::SystemHandler; | |
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22 | 22 | |
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23 | 23 | pub trait ChgClientExt<C> |
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24 | 24 | where |
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25 | 25 | C: Connection + AsRawFd, |
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26 | 26 | { |
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27 | 27 | /// Attaches the client file descriptors to the server. |
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28 | 28 | fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E> |
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29 | 29 | where |
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30 | 30 | I: AsRawFd, |
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31 | 31 | O: AsRawFd, |
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32 | 32 | E: AsRawFd; |
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33 | 33 | |
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34 | 34 | /// Changes the working directory of the server. |
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35 | 35 | fn set_current_dir<P>(self, dir: P) -> OneShotRequest<C> |
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36 | 36 | where |
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37 | 37 | P: AsRef<Path>; |
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38 | 38 | |
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39 | 39 | /// Updates the environment variables of the server. |
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40 | 40 | fn set_env_vars_os<I, P>(self, vars: I) -> OneShotRequest<C> |
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41 | 41 | where |
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42 | 42 | I: IntoIterator<Item = (P, P)>, |
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43 | 43 | P: AsRef<OsStr>; |
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44 | 44 | |
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45 | 45 | /// Changes the process title of the server. |
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46 | 46 | fn set_process_name<P>(self, name: P) -> OneShotRequest<C> |
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47 | 47 | where |
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48 | 48 | P: AsRef<OsStr>; |
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49 | 49 | |
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50 | 50 | /// Changes the umask of the server process. |
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51 | 51 | fn set_umask(self, mask: u32) -> OneShotRequest<C>; |
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52 | 52 | |
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53 | 53 | /// Runs the specified Mercurial command with cHg extension. |
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54 | 54 | fn run_command_chg<I, P, H>(self, handler: H, args: I) -> ChgRunCommand<C, H> |
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55 | 55 | where |
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56 | 56 | I: IntoIterator<Item = P>, |
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57 | 57 | P: AsRef<OsStr>, |
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58 | 58 | H: SystemHandler; |
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59 | 59 | |
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60 | 60 | /// Validates if the server can run Mercurial commands with the expected |
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61 | 61 | /// configuration. |
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62 | 62 | /// |
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63 | 63 | /// The `args` should contain early command arguments such as `--config` |
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64 | 64 | /// and `-R`. |
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65 | 65 | /// |
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66 | 66 | /// Client-side environment must be sent prior to this request, by |
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67 | 67 | /// `set_current_dir()` and `set_env_vars_os()`. |
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68 | 68 | fn validate<I, P>(self, args: I) -> OneShotQuery<C, fn(Bytes) -> io::Result<Vec<Instruction>>> |
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69 | 69 | where |
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70 | 70 | I: IntoIterator<Item = P>, |
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71 | 71 | P: AsRef<OsStr>; |
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72 | 72 | } |
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73 | 73 | |
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74 | 74 | impl<C> ChgClientExt<C> for Client<C> |
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75 | 75 | where |
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76 | 76 | C: Connection + AsRawFd, |
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77 | 77 | { |
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78 | 78 | fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E> |
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79 | 79 | where |
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80 | 80 | I: AsRawFd, |
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81 | 81 | O: AsRawFd, |
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82 | 82 | E: AsRawFd, |
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83 | 83 | { |
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84 | 84 | AttachIo::with_client(self, stdin, stdout, Some(stderr)) |
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85 | 85 | } |
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86 | 86 | |
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87 | 87 | fn set_current_dir<P>(self, dir: P) -> OneShotRequest<C> |
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88 | 88 | where |
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89 | 89 | P: AsRef<Path>, |
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90 | 90 | { |
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91 | 91 | OneShotRequest::start_with_args(self, b"chdir", dir.as_ref().as_os_str().as_bytes()) |
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92 | 92 | } |
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93 | 93 | |
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94 | 94 | fn set_env_vars_os<I, P>(self, vars: I) -> OneShotRequest<C> |
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95 | 95 | where |
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96 | 96 | I: IntoIterator<Item = (P, P)>, |
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97 | 97 | P: AsRef<OsStr>, |
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98 | 98 | { |
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99 | 99 | OneShotRequest::start_with_args(self, b"setenv", message::pack_env_vars_os(vars)) |
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100 | 100 | } |
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101 | 101 | |
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102 | 102 | fn set_process_name<P>(self, name: P) -> OneShotRequest<C> |
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103 | 103 | where |
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104 | 104 | P: AsRef<OsStr>, |
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105 | 105 | { |
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106 | 106 | OneShotRequest::start_with_args(self, b"setprocname", name.as_ref().as_bytes()) |
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107 | 107 | } |
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108 | 108 | |
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109 | 109 | fn set_umask(self, mask: u32) -> OneShotRequest<C> { |
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110 | 110 | let mut args = BytesMut::with_capacity(mem::size_of_val(&mask)); |
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111 | 111 | args.put_u32_be(mask); |
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112 | 112 | OneShotRequest::start_with_args(self, b"setumask2", args) |
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113 | 113 | } |
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114 | 114 | |
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115 | 115 | fn run_command_chg<I, P, H>(self, handler: H, args: I) -> ChgRunCommand<C, H> |
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116 | 116 | where |
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117 | 117 | I: IntoIterator<Item = P>, |
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118 | 118 | P: AsRef<OsStr>, |
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119 | 119 | H: SystemHandler, |
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120 | 120 | { |
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121 | 121 | ChgRunCommand::with_client(self, handler, message::pack_args_os(args)) |
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122 | 122 | } |
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123 | 123 | |
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124 | 124 | fn validate<I, P>(self, args: I) -> OneShotQuery<C, fn(Bytes) -> io::Result<Vec<Instruction>>> |
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125 | 125 | where |
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126 | 126 | I: IntoIterator<Item = P>, |
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127 | 127 | P: AsRef<OsStr>, |
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128 | 128 | { |
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129 | 129 | OneShotQuery::start_with_args( |
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130 | 130 | self, |
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131 | 131 | b"validate", |
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132 | 132 | message::pack_args_os(args), |
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133 | 133 | message::parse_instructions, |
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134 | 134 | ) |
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135 | 135 | } |
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136 | 136 | } |
@@ -1,501 +1,501 b'' | |||
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1 | 1 | // Copyright 2011, 2018 Yuya Nishihara <yuya@tcha.org> |
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2 | 2 | // |
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3 | 3 | // This software may be used and distributed according to the terms of the |
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4 | 4 | // GNU General Public License version 2 or any later version. |
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5 | 5 | |
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6 | 6 | //! Utility for locating command-server process. |
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7 | 7 | |
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8 | 8 | use futures::future::{self, Either, Loop}; |
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9 | 9 | use log::debug; |
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10 | 10 | use std::env; |
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11 | 11 | use std::ffi::{OsStr, OsString}; |
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12 | 12 | use std::fs::{self, DirBuilder}; |
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13 | 13 | use std::io; |
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14 | 14 | use std::os::unix::ffi::{OsStrExt, OsStringExt}; |
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15 | 15 | use std::os::unix::fs::{DirBuilderExt, MetadataExt}; |
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16 | 16 | use std::path::{Path, PathBuf}; |
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17 | 17 | use std::process::{self, Command}; |
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18 | 18 | use std::time::Duration; |
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19 | 19 | use tokio::prelude::*; |
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20 | 20 | use tokio_hglib::UnixClient; |
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21 | 21 | use tokio_process::{Child, CommandExt}; |
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22 | 22 | use tokio_timer; |
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23 | 23 | |
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24 |
use |
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25 |
use |
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26 |
use |
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24 | use crate::clientext::ChgClientExt; | |
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25 | use crate::message::{Instruction, ServerSpec}; | |
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26 | use crate::procutil; | |
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27 | 27 | |
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28 | 28 | const REQUIRED_SERVER_CAPABILITIES: &[&str] = &[ |
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29 | 29 | "attachio", |
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30 | 30 | "chdir", |
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31 | 31 | "runcommand", |
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32 | 32 | "setenv", |
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33 | 33 | "setumask2", |
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34 | 34 | "validate", |
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35 | 35 | ]; |
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36 | 36 | |
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37 | 37 | /// Helper to connect to and spawn a server process. |
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38 | 38 | #[derive(Clone, Debug)] |
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39 | 39 | pub struct Locator { |
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40 | 40 | hg_command: OsString, |
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41 | 41 | hg_early_args: Vec<OsString>, |
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42 | 42 | current_dir: PathBuf, |
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43 | 43 | env_vars: Vec<(OsString, OsString)>, |
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44 | 44 | process_id: u32, |
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45 | 45 | base_sock_path: PathBuf, |
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46 | 46 | redirect_sock_path: Option<PathBuf>, |
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47 | 47 | timeout: Duration, |
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48 | 48 | } |
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49 | 49 | |
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50 | 50 | impl Locator { |
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51 | 51 | /// Creates locator capturing the current process environment. |
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52 | 52 | /// |
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53 | 53 | /// If no `$CHGSOCKNAME` is specified, the socket directory will be |
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54 | 54 | /// created as necessary. |
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55 | 55 | pub fn prepare_from_env() -> io::Result<Locator> { |
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56 | 56 | Ok(Locator { |
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57 | 57 | hg_command: default_hg_command(), |
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58 | 58 | hg_early_args: Vec::new(), |
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59 | 59 | current_dir: env::current_dir()?, |
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60 | 60 | env_vars: env::vars_os().collect(), |
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61 | 61 | process_id: process::id(), |
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62 | 62 | base_sock_path: prepare_server_socket_path()?, |
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63 | 63 | redirect_sock_path: None, |
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64 | 64 | timeout: default_timeout(), |
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65 | 65 | }) |
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66 | 66 | } |
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67 | 67 | |
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68 | 68 | /// Temporary socket path for this client process. |
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69 | 69 | fn temp_sock_path(&self) -> PathBuf { |
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70 | 70 | let src = self.base_sock_path.as_os_str().as_bytes(); |
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71 | 71 | let mut buf = Vec::with_capacity(src.len() + 6); // "{src}.{pid}".len() |
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72 | 72 | buf.extend_from_slice(src); |
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73 | 73 | buf.extend_from_slice(format!(".{}", self.process_id).as_bytes()); |
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74 | 74 | OsString::from_vec(buf).into() |
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75 | 75 | } |
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76 | 76 | |
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77 | 77 | /// Specifies the arguments to be passed to the server at start. |
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78 | 78 | pub fn set_early_args<I, P>(&mut self, args: I) |
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79 | 79 | where |
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80 | 80 | I: IntoIterator<Item = P>, |
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81 | 81 | P: AsRef<OsStr>, |
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82 | 82 | { |
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83 | 83 | self.hg_early_args = args.into_iter().map(|a| a.as_ref().to_owned()).collect(); |
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84 | 84 | } |
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85 | 85 | |
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86 | 86 | /// Connects to the server. |
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87 | 87 | /// |
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88 | 88 | /// The server process will be spawned if not running. |
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89 | 89 | pub fn connect(self) -> impl Future<Item = (Self, UnixClient), Error = io::Error> { |
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90 | 90 | future::loop_fn((self, 0), |(loc, cnt)| { |
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91 | 91 | if cnt < 10 { |
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92 | 92 | let fut = loc |
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93 | 93 | .try_connect() |
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94 | 94 | .and_then(|(loc, client)| { |
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95 | 95 | client |
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96 | 96 | .validate(&loc.hg_early_args) |
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97 | 97 | .map(|(client, instructions)| (loc, client, instructions)) |
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98 | 98 | }) |
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99 | 99 | .and_then(move |(loc, client, instructions)| { |
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100 | 100 | loc.run_instructions(client, instructions, cnt) |
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101 | 101 | }); |
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102 | 102 | Either::A(fut) |
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103 | 103 | } else { |
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104 | 104 | let msg = format!( |
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105 | 105 | concat!( |
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106 | 106 | "too many redirections.\n", |
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107 | 107 | "Please make sure {:?} is not a wrapper which ", |
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108 | 108 | "changes sensitive environment variables ", |
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109 | 109 | "before executing hg. If you have to use a ", |
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110 | 110 | "wrapper, wrap chg instead of hg.", |
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111 | 111 | ), |
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112 | 112 | loc.hg_command |
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113 | 113 | ); |
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114 | 114 | Either::B(future::err(io::Error::new(io::ErrorKind::Other, msg))) |
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115 | 115 | } |
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116 | 116 | }) |
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117 | 117 | } |
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118 | 118 | |
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119 | 119 | /// Runs instructions received from the server. |
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120 | 120 | fn run_instructions( |
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121 | 121 | mut self, |
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122 | 122 | client: UnixClient, |
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123 | 123 | instructions: Vec<Instruction>, |
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124 | 124 | cnt: usize, |
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125 | 125 | ) -> io::Result<Loop<(Self, UnixClient), (Self, usize)>> { |
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126 | 126 | let mut reconnect = false; |
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127 | 127 | for inst in instructions { |
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128 | 128 | debug!("instruction: {:?}", inst); |
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129 | 129 | match inst { |
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130 | 130 | Instruction::Exit(_) => { |
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131 | 131 | // Just returns the current connection to run the |
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132 | 132 | // unparsable command and report the error |
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133 | 133 | return Ok(Loop::Break((self, client))); |
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134 | 134 | } |
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135 | 135 | Instruction::Reconnect => { |
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136 | 136 | reconnect = true; |
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137 | 137 | } |
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138 | 138 | Instruction::Redirect(path) => { |
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139 | 139 | if path.parent() != self.base_sock_path.parent() { |
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140 | 140 | let msg = format!( |
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141 | 141 | "insecure redirect instruction from server: {}", |
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142 | 142 | path.display() |
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143 | 143 | ); |
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144 | 144 | return Err(io::Error::new(io::ErrorKind::InvalidData, msg)); |
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145 | 145 | } |
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146 | 146 | self.redirect_sock_path = Some(path); |
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147 | 147 | reconnect = true; |
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148 | 148 | } |
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149 | 149 | Instruction::Unlink(path) => { |
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150 | 150 | if path.parent() != self.base_sock_path.parent() { |
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151 | 151 | let msg = format!( |
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152 | 152 | "insecure unlink instruction from server: {}", |
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153 | 153 | path.display() |
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154 | 154 | ); |
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155 | 155 | return Err(io::Error::new(io::ErrorKind::InvalidData, msg)); |
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156 | 156 | } |
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157 | 157 | fs::remove_file(path).unwrap_or(()); // may race |
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158 | 158 | } |
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159 | 159 | } |
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160 | 160 | } |
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161 | 161 | |
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162 | 162 | if reconnect { |
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163 | 163 | Ok(Loop::Continue((self, cnt + 1))) |
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164 | 164 | } else { |
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165 | 165 | Ok(Loop::Break((self, client))) |
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166 | 166 | } |
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167 | 167 | } |
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168 | 168 | |
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169 | 169 | /// Tries to connect to the existing server, or spawns new if not running. |
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170 | 170 | fn try_connect(self) -> impl Future<Item = (Self, UnixClient), Error = io::Error> { |
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171 | 171 | let sock_path = self |
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172 | 172 | .redirect_sock_path |
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173 | 173 | .as_ref() |
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174 | 174 | .unwrap_or(&self.base_sock_path) |
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175 | 175 | .clone(); |
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176 | 176 | debug!("try connect to {}", sock_path.display()); |
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177 | 177 | UnixClient::connect(sock_path) |
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178 | 178 | .then(|res| { |
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179 | 179 | match res { |
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180 | 180 | Ok(client) => Either::A(future::ok((self, client))), |
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181 | 181 | Err(_) => { |
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182 | 182 | // Prevent us from being re-connected to the outdated |
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183 | 183 | // master server: We were told by the server to redirect |
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184 | 184 | // to redirect_sock_path, which didn't work. We do not |
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185 | 185 | // want to connect to the same master server again |
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186 | 186 | // because it would probably tell us the same thing. |
|
187 | 187 | if self.redirect_sock_path.is_some() { |
|
188 | 188 | fs::remove_file(&self.base_sock_path).unwrap_or(()); |
|
189 | 189 | // may race |
|
190 | 190 | } |
|
191 | 191 | Either::B(self.spawn_connect()) |
|
192 | 192 | } |
|
193 | 193 | } |
|
194 | 194 | }) |
|
195 | 195 | .and_then(|(loc, client)| { |
|
196 | 196 | check_server_capabilities(client.server_spec())?; |
|
197 | 197 | Ok((loc, client)) |
|
198 | 198 | }) |
|
199 | 199 | .and_then(|(loc, client)| { |
|
200 | 200 | // It's purely optional, and the server might not support this command. |
|
201 | 201 | if client.server_spec().capabilities.contains("setprocname") { |
|
202 | 202 | let fut = client |
|
203 | 203 | .set_process_name(format!("chg[worker/{}]", loc.process_id)) |
|
204 | 204 | .map(|client| (loc, client)); |
|
205 | 205 | Either::A(fut) |
|
206 | 206 | } else { |
|
207 | 207 | Either::B(future::ok((loc, client))) |
|
208 | 208 | } |
|
209 | 209 | }) |
|
210 | 210 | .and_then(|(loc, client)| { |
|
211 | 211 | client |
|
212 | 212 | .set_current_dir(&loc.current_dir) |
|
213 | 213 | .map(|client| (loc, client)) |
|
214 | 214 | }) |
|
215 | 215 | .and_then(|(loc, client)| { |
|
216 | 216 | client |
|
217 | 217 | .set_env_vars_os(loc.env_vars.iter().cloned()) |
|
218 | 218 | .map(|client| (loc, client)) |
|
219 | 219 | }) |
|
220 | 220 | } |
|
221 | 221 | |
|
222 | 222 | /// Spawns new server process and connects to it. |
|
223 | 223 | /// |
|
224 | 224 | /// The server will be spawned at the current working directory, then |
|
225 | 225 | /// chdir to "/", so that the server will load configs from the target |
|
226 | 226 | /// repository. |
|
227 | 227 | fn spawn_connect(self) -> impl Future<Item = (Self, UnixClient), Error = io::Error> { |
|
228 | 228 | let sock_path = self.temp_sock_path(); |
|
229 | 229 | debug!("start cmdserver at {}", sock_path.display()); |
|
230 | 230 | Command::new(&self.hg_command) |
|
231 | 231 | .arg("serve") |
|
232 | 232 | .arg("--cmdserver") |
|
233 | 233 | .arg("chgunix") |
|
234 | 234 | .arg("--address") |
|
235 | 235 | .arg(&sock_path) |
|
236 | 236 | .arg("--daemon-postexec") |
|
237 | 237 | .arg("chdir:/") |
|
238 | 238 | .args(&self.hg_early_args) |
|
239 | 239 | .current_dir(&self.current_dir) |
|
240 | 240 | .env_clear() |
|
241 | 241 | .envs(self.env_vars.iter().cloned()) |
|
242 | 242 | .env("CHGINTERNALMARK", "") |
|
243 | 243 | .spawn_async() |
|
244 | 244 | .into_future() |
|
245 | 245 | .and_then(|server| self.connect_spawned(server, sock_path)) |
|
246 | 246 | .and_then(|(loc, client, sock_path)| { |
|
247 | 247 | debug!( |
|
248 | 248 | "rename {} to {}", |
|
249 | 249 | sock_path.display(), |
|
250 | 250 | loc.base_sock_path.display() |
|
251 | 251 | ); |
|
252 | 252 | fs::rename(&sock_path, &loc.base_sock_path)?; |
|
253 | 253 | Ok((loc, client)) |
|
254 | 254 | }) |
|
255 | 255 | } |
|
256 | 256 | |
|
257 | 257 | /// Tries to connect to the just spawned server repeatedly until timeout |
|
258 | 258 | /// exceeded. |
|
259 | 259 | fn connect_spawned( |
|
260 | 260 | self, |
|
261 | 261 | server: Child, |
|
262 | 262 | sock_path: PathBuf, |
|
263 | 263 | ) -> impl Future<Item = (Self, UnixClient, PathBuf), Error = io::Error> { |
|
264 | 264 | debug!("try connect to {} repeatedly", sock_path.display()); |
|
265 | 265 | let connect = future::loop_fn(sock_path, |sock_path| { |
|
266 | 266 | UnixClient::connect(sock_path.clone()).then(|res| { |
|
267 | 267 | match res { |
|
268 | 268 | Ok(client) => Either::A(future::ok(Loop::Break((client, sock_path)))), |
|
269 | 269 | Err(_) => { |
|
270 | 270 | // try again with slight delay |
|
271 | 271 | let fut = tokio_timer::sleep(Duration::from_millis(10)) |
|
272 | 272 | .map(|()| Loop::Continue(sock_path)) |
|
273 | 273 | .map_err(|err| io::Error::new(io::ErrorKind::Other, err)); |
|
274 | 274 | Either::B(fut) |
|
275 | 275 | } |
|
276 | 276 | } |
|
277 | 277 | }) |
|
278 | 278 | }); |
|
279 | 279 | |
|
280 | 280 | // waits for either connection established or server failed to start |
|
281 | 281 | connect |
|
282 | 282 | .select2(server) |
|
283 | 283 | .map_err(|res| res.split().0) |
|
284 | 284 | .timeout(self.timeout) |
|
285 | 285 | .map_err(|err| { |
|
286 | 286 | err.into_inner().unwrap_or_else(|| { |
|
287 | 287 | io::Error::new( |
|
288 | 288 | io::ErrorKind::TimedOut, |
|
289 | 289 | "timed out while connecting to server", |
|
290 | 290 | ) |
|
291 | 291 | }) |
|
292 | 292 | }) |
|
293 | 293 | .and_then(|res| { |
|
294 | 294 | match res { |
|
295 | 295 | Either::A(((client, sock_path), server)) => { |
|
296 | 296 | server.forget(); // continue to run in background |
|
297 | 297 | Ok((self, client, sock_path)) |
|
298 | 298 | } |
|
299 | 299 | Either::B((st, _)) => Err(io::Error::new( |
|
300 | 300 | io::ErrorKind::Other, |
|
301 | 301 | format!("server exited too early: {}", st), |
|
302 | 302 | )), |
|
303 | 303 | } |
|
304 | 304 | }) |
|
305 | 305 | } |
|
306 | 306 | } |
|
307 | 307 | |
|
308 | 308 | /// Determines the server socket to connect to. |
|
309 | 309 | /// |
|
310 | 310 | /// If no `$CHGSOCKNAME` is specified, the socket directory will be created |
|
311 | 311 | /// as necessary. |
|
312 | 312 | fn prepare_server_socket_path() -> io::Result<PathBuf> { |
|
313 | 313 | if let Some(s) = env::var_os("CHGSOCKNAME") { |
|
314 | 314 | Ok(PathBuf::from(s)) |
|
315 | 315 | } else { |
|
316 | 316 | let mut path = default_server_socket_dir(); |
|
317 | 317 | create_secure_dir(&path)?; |
|
318 | 318 | path.push("server"); |
|
319 | 319 | Ok(path) |
|
320 | 320 | } |
|
321 | 321 | } |
|
322 | 322 | |
|
323 | 323 | /// Determines the default server socket path as follows. |
|
324 | 324 | /// |
|
325 | 325 | /// 1. `$XDG_RUNTIME_DIR/chg` |
|
326 | 326 | /// 2. `$TMPDIR/chg$UID` |
|
327 | 327 | /// 3. `/tmp/chg$UID` |
|
328 | 328 | pub fn default_server_socket_dir() -> PathBuf { |
|
329 | 329 | // XDG_RUNTIME_DIR should be ignored if it has an insufficient permission. |
|
330 | 330 | // https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html |
|
331 | 331 | if let Some(Ok(s)) = env::var_os("XDG_RUNTIME_DIR").map(check_secure_dir) { |
|
332 | 332 | let mut path = PathBuf::from(s); |
|
333 | 333 | path.push("chg"); |
|
334 | 334 | path |
|
335 | 335 | } else { |
|
336 | 336 | let mut path = env::temp_dir(); |
|
337 | 337 | path.push(format!("chg{}", procutil::get_effective_uid())); |
|
338 | 338 | path |
|
339 | 339 | } |
|
340 | 340 | } |
|
341 | 341 | |
|
342 | 342 | /// Determines the default hg command. |
|
343 | 343 | pub fn default_hg_command() -> OsString { |
|
344 | 344 | // TODO: maybe allow embedding the path at compile time (or load from hgrc) |
|
345 | 345 | env::var_os("CHGHG") |
|
346 | 346 | .or(env::var_os("HG")) |
|
347 | 347 | .unwrap_or(OsStr::new("hg").to_owned()) |
|
348 | 348 | } |
|
349 | 349 | |
|
350 | 350 | fn default_timeout() -> Duration { |
|
351 | 351 | let secs = env::var("CHGTIMEOUT") |
|
352 | 352 | .ok() |
|
353 | 353 | .and_then(|s| s.parse().ok()) |
|
354 | 354 | .unwrap_or(60); |
|
355 | 355 | Duration::from_secs(secs) |
|
356 | 356 | } |
|
357 | 357 | |
|
358 | 358 | /// Creates a directory which the other users cannot access to. |
|
359 | 359 | /// |
|
360 | 360 | /// If the directory already exists, tests its permission. |
|
361 | 361 | fn create_secure_dir<P>(path: P) -> io::Result<()> |
|
362 | 362 | where |
|
363 | 363 | P: AsRef<Path>, |
|
364 | 364 | { |
|
365 | 365 | DirBuilder::new() |
|
366 | 366 | .mode(0o700) |
|
367 | 367 | .create(path.as_ref()) |
|
368 | 368 | .or_else(|err| { |
|
369 | 369 | if err.kind() == io::ErrorKind::AlreadyExists { |
|
370 | 370 | check_secure_dir(path).map(|_| ()) |
|
371 | 371 | } else { |
|
372 | 372 | Err(err) |
|
373 | 373 | } |
|
374 | 374 | }) |
|
375 | 375 | } |
|
376 | 376 | |
|
377 | 377 | fn check_secure_dir<P>(path: P) -> io::Result<P> |
|
378 | 378 | where |
|
379 | 379 | P: AsRef<Path>, |
|
380 | 380 | { |
|
381 | 381 | let a = fs::symlink_metadata(path.as_ref())?; |
|
382 | 382 | if a.is_dir() && a.uid() == procutil::get_effective_uid() && (a.mode() & 0o777) == 0o700 { |
|
383 | 383 | Ok(path) |
|
384 | 384 | } else { |
|
385 | 385 | Err(io::Error::new(io::ErrorKind::Other, "insecure directory")) |
|
386 | 386 | } |
|
387 | 387 | } |
|
388 | 388 | |
|
389 | 389 | fn check_server_capabilities(spec: &ServerSpec) -> io::Result<()> { |
|
390 | 390 | let unsupported: Vec<_> = REQUIRED_SERVER_CAPABILITIES |
|
391 | 391 | .iter() |
|
392 | 392 | .cloned() |
|
393 | 393 | .filter(|&s| !spec.capabilities.contains(s)) |
|
394 | 394 | .collect(); |
|
395 | 395 | if unsupported.is_empty() { |
|
396 | 396 | Ok(()) |
|
397 | 397 | } else { |
|
398 | 398 | let msg = format!( |
|
399 | 399 | "insufficient server capabilities: {}", |
|
400 | 400 | unsupported.join(", ") |
|
401 | 401 | ); |
|
402 | 402 | Err(io::Error::new(io::ErrorKind::Other, msg)) |
|
403 | 403 | } |
|
404 | 404 | } |
|
405 | 405 | |
|
406 | 406 | /// Collects arguments which need to be passed to the server at start. |
|
407 | 407 | pub fn collect_early_args<I, P>(args: I) -> Vec<OsString> |
|
408 | 408 | where |
|
409 | 409 | I: IntoIterator<Item = P>, |
|
410 | 410 | P: AsRef<OsStr>, |
|
411 | 411 | { |
|
412 | 412 | let mut args_iter = args.into_iter(); |
|
413 | 413 | let mut early_args = Vec::new(); |
|
414 | 414 | while let Some(arg) = args_iter.next() { |
|
415 | 415 | let argb = arg.as_ref().as_bytes(); |
|
416 | 416 | if argb == b"--" { |
|
417 | 417 | break; |
|
418 | 418 | } else if argb.starts_with(b"--") { |
|
419 | 419 | let mut split = argb[2..].splitn(2, |&c| c == b'='); |
|
420 | 420 | match split.next().unwrap() { |
|
421 | 421 | b"traceback" => { |
|
422 | 422 | if split.next().is_none() { |
|
423 | 423 | early_args.push(arg.as_ref().to_owned()); |
|
424 | 424 | } |
|
425 | 425 | } |
|
426 | 426 | b"config" | b"cwd" | b"repo" | b"repository" => { |
|
427 | 427 | if split.next().is_some() { |
|
428 | 428 | // --<flag>=<val> |
|
429 | 429 | early_args.push(arg.as_ref().to_owned()); |
|
430 | 430 | } else { |
|
431 | 431 | // --<flag> <val> |
|
432 | 432 | args_iter.next().map(|val| { |
|
433 | 433 | early_args.push(arg.as_ref().to_owned()); |
|
434 | 434 | early_args.push(val.as_ref().to_owned()); |
|
435 | 435 | }); |
|
436 | 436 | } |
|
437 | 437 | } |
|
438 | 438 | _ => {} |
|
439 | 439 | } |
|
440 | 440 | } else if argb.starts_with(b"-R") { |
|
441 | 441 | if argb.len() > 2 { |
|
442 | 442 | // -R<val> |
|
443 | 443 | early_args.push(arg.as_ref().to_owned()); |
|
444 | 444 | } else { |
|
445 | 445 | // -R <val> |
|
446 | 446 | args_iter.next().map(|val| { |
|
447 | 447 | early_args.push(arg.as_ref().to_owned()); |
|
448 | 448 | early_args.push(val.as_ref().to_owned()); |
|
449 | 449 | }); |
|
450 | 450 | } |
|
451 | 451 | } |
|
452 | 452 | } |
|
453 | 453 | |
|
454 | 454 | early_args |
|
455 | 455 | } |
|
456 | 456 | |
|
457 | 457 | #[cfg(test)] |
|
458 | 458 | mod tests { |
|
459 | 459 | use super::*; |
|
460 | 460 | |
|
461 | 461 | #[test] |
|
462 | 462 | fn collect_early_args_some() { |
|
463 | 463 | assert!(collect_early_args(&[] as &[&OsStr]).is_empty()); |
|
464 | 464 | assert!(collect_early_args(&["log"]).is_empty()); |
|
465 | 465 | assert_eq!( |
|
466 | 466 | collect_early_args(&["log", "-Ra", "foo"]), |
|
467 | 467 | os_string_vec_from(&[b"-Ra"]) |
|
468 | 468 | ); |
|
469 | 469 | assert_eq!( |
|
470 | 470 | collect_early_args(&["log", "-R", "repo", "", "--traceback", "a"]), |
|
471 | 471 | os_string_vec_from(&[b"-R", b"repo", b"--traceback"]) |
|
472 | 472 | ); |
|
473 | 473 | assert_eq!( |
|
474 | 474 | collect_early_args(&["log", "--config", "diff.git=1", "-q"]), |
|
475 | 475 | os_string_vec_from(&[b"--config", b"diff.git=1"]) |
|
476 | 476 | ); |
|
477 | 477 | assert_eq!( |
|
478 | 478 | collect_early_args(&["--cwd=..", "--repository", "r", "log"]), |
|
479 | 479 | os_string_vec_from(&[b"--cwd=..", b"--repository", b"r"]) |
|
480 | 480 | ); |
|
481 | 481 | assert_eq!( |
|
482 | 482 | collect_early_args(&["log", "--repo=r", "--repos", "a"]), |
|
483 | 483 | os_string_vec_from(&[b"--repo=r"]) |
|
484 | 484 | ); |
|
485 | 485 | } |
|
486 | 486 | |
|
487 | 487 | #[test] |
|
488 | 488 | fn collect_early_args_orphaned() { |
|
489 | 489 | assert!(collect_early_args(&["log", "-R"]).is_empty()); |
|
490 | 490 | assert!(collect_early_args(&["log", "--config"]).is_empty()); |
|
491 | 491 | } |
|
492 | 492 | |
|
493 | 493 | #[test] |
|
494 | 494 | fn collect_early_args_unwanted_value() { |
|
495 | 495 | assert!(collect_early_args(&["log", "--traceback="]).is_empty()); |
|
496 | 496 | } |
|
497 | 497 | |
|
498 | 498 | fn os_string_vec_from(v: &[&[u8]]) -> Vec<OsString> { |
|
499 | 499 | v.iter().map(|s| OsStr::from_bytes(s).to_owned()).collect() |
|
500 | 500 | } |
|
501 | 501 | } |
@@ -1,171 +1,171 b'' | |||
|
1 | 1 | // Copyright 2018 Yuya Nishihara <yuya@tcha.org> |
|
2 | 2 | // |
|
3 | 3 | // This software may be used and distributed according to the terms of the |
|
4 | 4 | // GNU General Public License version 2 or any later version. |
|
5 | 5 | |
|
6 | 6 | //! Functions to run Mercurial command in cHg-aware command server. |
|
7 | 7 | |
|
8 | 8 | use bytes::Bytes; |
|
9 | 9 | use futures::future::IntoFuture; |
|
10 | 10 | use futures::{Async, Future, Poll}; |
|
11 | 11 | use std::io; |
|
12 | 12 | use std::mem; |
|
13 | 13 | use std::os::unix::io::AsRawFd; |
|
14 | 14 | use tokio_hglib::codec::ChannelMessage; |
|
15 | 15 | use tokio_hglib::protocol::MessageLoop; |
|
16 | 16 | use tokio_hglib::{Client, Connection}; |
|
17 | 17 | |
|
18 |
use |
|
|
19 |
use |
|
|
20 |
use |
|
|
18 | use crate::attachio::AttachIo; | |
|
19 | use crate::message::{self, CommandType}; | |
|
20 | use crate::uihandler::SystemHandler; | |
|
21 | 21 | |
|
22 | 22 | enum AsyncS<R, S> { |
|
23 | 23 | Ready(R), |
|
24 | 24 | NotReady(S), |
|
25 | 25 | PollAgain(S), |
|
26 | 26 | } |
|
27 | 27 | |
|
28 | 28 | enum CommandState<C, H> |
|
29 | 29 | where |
|
30 | 30 | C: Connection, |
|
31 | 31 | H: SystemHandler, |
|
32 | 32 | { |
|
33 | 33 | Running(MessageLoop<C>, H), |
|
34 | 34 | SpawningPager(Client<C>, <H::SpawnPagerResult as IntoFuture>::Future), |
|
35 | 35 | AttachingPager(AttachIo<C, io::Stdin, H::PagerStdin, H::PagerStdin>, H), |
|
36 | 36 | WaitingSystem(Client<C>, <H::RunSystemResult as IntoFuture>::Future), |
|
37 | 37 | Finished, |
|
38 | 38 | } |
|
39 | 39 | |
|
40 | 40 | type CommandPoll<C, H> = io::Result<AsyncS<(Client<C>, H, i32), CommandState<C, H>>>; |
|
41 | 41 | |
|
42 | 42 | /// Future resolves to `(exit_code, client)`. |
|
43 | 43 | #[must_use = "futures do nothing unless polled"] |
|
44 | 44 | pub struct ChgRunCommand<C, H> |
|
45 | 45 | where |
|
46 | 46 | C: Connection, |
|
47 | 47 | H: SystemHandler, |
|
48 | 48 | { |
|
49 | 49 | state: CommandState<C, H>, |
|
50 | 50 | } |
|
51 | 51 | |
|
52 | 52 | impl<C, H> ChgRunCommand<C, H> |
|
53 | 53 | where |
|
54 | 54 | C: Connection + AsRawFd, |
|
55 | 55 | H: SystemHandler, |
|
56 | 56 | { |
|
57 | 57 | pub fn with_client(client: Client<C>, handler: H, packed_args: Bytes) -> ChgRunCommand<C, H> { |
|
58 | 58 | let msg_loop = MessageLoop::start_with_args(client, b"runcommand", packed_args); |
|
59 | 59 | ChgRunCommand { |
|
60 | 60 | state: CommandState::Running(msg_loop, handler), |
|
61 | 61 | } |
|
62 | 62 | } |
|
63 | 63 | } |
|
64 | 64 | |
|
65 | 65 | impl<C, H> Future for ChgRunCommand<C, H> |
|
66 | 66 | where |
|
67 | 67 | C: Connection + AsRawFd, |
|
68 | 68 | H: SystemHandler, |
|
69 | 69 | { |
|
70 | 70 | type Item = (Client<C>, H, i32); |
|
71 | 71 | type Error = io::Error; |
|
72 | 72 | |
|
73 | 73 | fn poll(&mut self) -> Poll<Self::Item, Self::Error> { |
|
74 | 74 | loop { |
|
75 | 75 | let state = mem::replace(&mut self.state, CommandState::Finished); |
|
76 | 76 | match state.poll()? { |
|
77 | 77 | AsyncS::Ready((client, handler, code)) => { |
|
78 | 78 | return Ok(Async::Ready((client, handler, code))); |
|
79 | 79 | } |
|
80 | 80 | AsyncS::NotReady(newstate) => { |
|
81 | 81 | self.state = newstate; |
|
82 | 82 | return Ok(Async::NotReady); |
|
83 | 83 | } |
|
84 | 84 | AsyncS::PollAgain(newstate) => { |
|
85 | 85 | self.state = newstate; |
|
86 | 86 | } |
|
87 | 87 | } |
|
88 | 88 | } |
|
89 | 89 | } |
|
90 | 90 | } |
|
91 | 91 | |
|
92 | 92 | impl<C, H> CommandState<C, H> |
|
93 | 93 | where |
|
94 | 94 | C: Connection + AsRawFd, |
|
95 | 95 | H: SystemHandler, |
|
96 | 96 | { |
|
97 | 97 | fn poll(self) -> CommandPoll<C, H> { |
|
98 | 98 | match self { |
|
99 | 99 | CommandState::Running(mut msg_loop, handler) => { |
|
100 | 100 | if let Async::Ready((client, msg)) = msg_loop.poll()? { |
|
101 | 101 | process_message(client, handler, msg) |
|
102 | 102 | } else { |
|
103 | 103 | Ok(AsyncS::NotReady(CommandState::Running(msg_loop, handler))) |
|
104 | 104 | } |
|
105 | 105 | } |
|
106 | 106 | CommandState::SpawningPager(client, mut fut) => { |
|
107 | 107 | if let Async::Ready((handler, pin)) = fut.poll()? { |
|
108 | 108 | let fut = AttachIo::with_client(client, io::stdin(), pin, None); |
|
109 | 109 | Ok(AsyncS::PollAgain(CommandState::AttachingPager( |
|
110 | 110 | fut, handler, |
|
111 | 111 | ))) |
|
112 | 112 | } else { |
|
113 | 113 | Ok(AsyncS::NotReady(CommandState::SpawningPager(client, fut))) |
|
114 | 114 | } |
|
115 | 115 | } |
|
116 | 116 | CommandState::AttachingPager(mut fut, handler) => { |
|
117 | 117 | if let Async::Ready(client) = fut.poll()? { |
|
118 | 118 | let msg_loop = MessageLoop::start(client, b""); // terminator |
|
119 | 119 | Ok(AsyncS::PollAgain(CommandState::Running(msg_loop, handler))) |
|
120 | 120 | } else { |
|
121 | 121 | Ok(AsyncS::NotReady(CommandState::AttachingPager(fut, handler))) |
|
122 | 122 | } |
|
123 | 123 | } |
|
124 | 124 | CommandState::WaitingSystem(client, mut fut) => { |
|
125 | 125 | if let Async::Ready((handler, code)) = fut.poll()? { |
|
126 | 126 | let data = message::pack_result_code(code); |
|
127 | 127 | let msg_loop = MessageLoop::resume_with_data(client, data); |
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128 | 128 | Ok(AsyncS::PollAgain(CommandState::Running(msg_loop, handler))) |
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129 | 129 | } else { |
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130 | 130 | Ok(AsyncS::NotReady(CommandState::WaitingSystem(client, fut))) |
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131 | 131 | } |
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132 | 132 | } |
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133 | 133 | CommandState::Finished => panic!("poll ChgRunCommand after it's done"), |
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134 | 134 | } |
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135 | 135 | } |
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136 | 136 | } |
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137 | 137 | |
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138 | 138 | fn process_message<C, H>(client: Client<C>, handler: H, msg: ChannelMessage) -> CommandPoll<C, H> |
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139 | 139 | where |
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140 | 140 | C: Connection, |
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141 | 141 | H: SystemHandler, |
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142 | 142 | { |
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143 | 143 | match msg { |
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144 | 144 | ChannelMessage::Data(b'r', data) => { |
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145 | 145 | let code = message::parse_result_code(data)?; |
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146 | 146 | Ok(AsyncS::Ready((client, handler, code))) |
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147 | 147 | } |
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148 | 148 | ChannelMessage::Data(..) => { |
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149 | 149 | // just ignores data sent to optional channel |
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150 | 150 | let msg_loop = MessageLoop::resume(client); |
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151 | 151 | Ok(AsyncS::PollAgain(CommandState::Running(msg_loop, handler))) |
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152 | 152 | } |
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153 | 153 | ChannelMessage::InputRequest(..) | ChannelMessage::LineRequest(..) => Err(io::Error::new( |
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154 | 154 | io::ErrorKind::InvalidData, |
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155 | 155 | "unsupported request", |
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156 | 156 | )), |
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157 | 157 | ChannelMessage::SystemRequest(data) => { |
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158 | 158 | let (cmd_type, cmd_spec) = message::parse_command_spec(data)?; |
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159 | 159 | match cmd_type { |
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160 | 160 | CommandType::Pager => { |
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161 | 161 | let fut = handler.spawn_pager(cmd_spec).into_future(); |
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162 | 162 | Ok(AsyncS::PollAgain(CommandState::SpawningPager(client, fut))) |
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163 | 163 | } |
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164 | 164 | CommandType::System => { |
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165 | 165 | let fut = handler.run_system(cmd_spec).into_future(); |
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166 | 166 | Ok(AsyncS::PollAgain(CommandState::WaitingSystem(client, fut))) |
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167 | 167 | } |
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168 | 168 | } |
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169 | 169 | } |
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170 | 170 | } |
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171 | 171 | } |
@@ -1,88 +1,88 b'' | |||
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1 | 1 | // Copyright 2018 Yuya Nishihara <yuya@tcha.org> |
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2 | 2 | // |
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3 | 3 | // This software may be used and distributed according to the terms of the |
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4 | 4 | // GNU General Public License version 2 or any later version. |
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5 | 5 | |
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6 | 6 | use futures::future::IntoFuture; |
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7 | 7 | use futures::Future; |
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8 | 8 | use std::io; |
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9 | 9 | use std::os::unix::io::AsRawFd; |
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10 | 10 | use std::os::unix::process::ExitStatusExt; |
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11 | 11 | use std::process::{Command, Stdio}; |
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12 | 12 | use tokio; |
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13 | 13 | use tokio_process::{ChildStdin, CommandExt}; |
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14 | 14 | |
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15 |
use |
|
|
16 |
use |
|
|
15 | use crate::message::CommandSpec; | |
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16 | use crate::procutil; | |
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17 | 17 | |
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18 | 18 | /// Callback to process shell command requests received from server. |
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19 | 19 | pub trait SystemHandler: Sized { |
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20 | 20 | type PagerStdin: AsRawFd; |
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21 | 21 | type SpawnPagerResult: IntoFuture<Item = (Self, Self::PagerStdin), Error = io::Error>; |
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22 | 22 | type RunSystemResult: IntoFuture<Item = (Self, i32), Error = io::Error>; |
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23 | 23 | |
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24 | 24 | /// Handles pager command request. |
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25 | 25 | /// |
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26 | 26 | /// Returns the pipe to be attached to the server if the pager is spawned. |
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27 | 27 | fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult; |
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28 | 28 | |
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29 | 29 | /// Handles system command request. |
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30 | 30 | /// |
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31 | 31 | /// Returns command exit code (positive) or signal number (negative). |
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32 | 32 | fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult; |
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33 | 33 | } |
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34 | 34 | |
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35 | 35 | /// Default cHg implementation to process requests received from server. |
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36 | 36 | pub struct ChgUiHandler {} |
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37 | 37 | |
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38 | 38 | impl ChgUiHandler { |
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39 | 39 | pub fn new() -> ChgUiHandler { |
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40 | 40 | ChgUiHandler {} |
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41 | 41 | } |
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42 | 42 | } |
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43 | 43 | |
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44 | 44 | impl SystemHandler for ChgUiHandler { |
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45 | 45 | type PagerStdin = ChildStdin; |
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46 | 46 | type SpawnPagerResult = io::Result<(Self, Self::PagerStdin)>; |
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47 | 47 | type RunSystemResult = Box<dyn Future<Item = (Self, i32), Error = io::Error> + Send>; |
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48 | 48 | |
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49 | 49 | fn spawn_pager(self, spec: CommandSpec) -> Self::SpawnPagerResult { |
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50 | 50 | let mut pager = new_shell_command(&spec) |
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51 | 51 | .stdin(Stdio::piped()) |
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52 | 52 | .spawn_async()?; |
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53 | 53 | let pin = pager.stdin().take().unwrap(); |
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54 | 54 | procutil::set_blocking_fd(pin.as_raw_fd())?; |
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55 | 55 | // TODO: if pager exits, notify the server with SIGPIPE immediately. |
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56 | 56 | // otherwise the server won't get SIGPIPE if it does not write |
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57 | 57 | // anything. (issue5278) |
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58 | 58 | // kill(peerpid, SIGPIPE); |
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59 | 59 | tokio::spawn(pager.map(|_| ()).map_err(|_| ())); // just ignore errors |
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60 | 60 | Ok((self, pin)) |
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61 | 61 | } |
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62 | 62 | |
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63 | 63 | fn run_system(self, spec: CommandSpec) -> Self::RunSystemResult { |
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64 | 64 | let fut = new_shell_command(&spec) |
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65 | 65 | .spawn_async() |
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66 | 66 | .into_future() |
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67 | 67 | .flatten() |
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68 | 68 | .map(|status| { |
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69 | 69 | let code = status |
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70 | 70 | .code() |
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71 | 71 | .or_else(|| status.signal().map(|n| -n)) |
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72 | 72 | .expect("either exit code or signal should be set"); |
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73 | 73 | (self, code) |
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74 | 74 | }); |
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75 | 75 | Box::new(fut) |
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76 | 76 | } |
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77 | 77 | } |
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78 | 78 | |
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79 | 79 | fn new_shell_command(spec: &CommandSpec) -> Command { |
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80 | 80 | let mut builder = Command::new("/bin/sh"); |
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81 | 81 | builder |
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82 | 82 | .arg("-c") |
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83 | 83 | .arg(&spec.command) |
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84 | 84 | .current_dir(&spec.current_dir) |
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85 | 85 | .env_clear() |
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86 | 86 | .envs(spec.envs.iter().cloned()); |
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87 | 87 | builder |
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88 | 88 | } |
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