| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `crates/stdx/src/process.rs`."><title>process.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-84e720fa.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="stdx" data-themes="" data-resource-suffix="" data-rustdoc-version="1.89.0 (29483883e 2025-08-04)" data-channel="1.89.0" data-search-js="search-92309212.js" data-settings-js="settings-5514c975.js" ><script src="../../static.files/storage-4e99c027.js"></script><script defer src="../../static.files/src-script-813739b1.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-fd3af306.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-32bb7600.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">stdx/</div>process.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="doccomment">//! Read both stdout and stderr of child without deadlocks. |
| <a href=#2 id=2 data-nosnippet>2</a>//! |
| <a href=#3 id=3 data-nosnippet>3</a>//! <https://github.com/rust-lang/cargo/blob/905af549966f23a9288e9993a85d1249a5436556/crates/cargo-util/src/read2.rs> |
| <a href=#4 id=4 data-nosnippet>4</a>//! <https://github.com/rust-lang/cargo/blob/58a961314437258065e23cb6316dfc121d96fb71/crates/cargo-util/src/process_builder.rs#L231> |
| <a href=#5 id=5 data-nosnippet>5</a> |
| <a href=#6 id=6 data-nosnippet>6</a></span><span class="kw">use </span>std::{ |
| <a href=#7 id=7 data-nosnippet>7</a> io, |
| <a href=#8 id=8 data-nosnippet>8</a> process::{ChildStderr, ChildStdout, Command, Output, Stdio}, |
| <a href=#9 id=9 data-nosnippet>9</a>}; |
| <a href=#10 id=10 data-nosnippet>10</a> |
| <a href=#11 id=11 data-nosnippet>11</a><span class="kw">use </span><span class="kw">crate</span>::JodChild; |
| <a href=#12 id=12 data-nosnippet>12</a> |
| <a href=#13 id=13 data-nosnippet>13</a><span class="kw">pub fn </span>streaming_output( |
| <a href=#14 id=14 data-nosnippet>14</a> out: ChildStdout, |
| <a href=#15 id=15 data-nosnippet>15</a> err: ChildStderr, |
| <a href=#16 id=16 data-nosnippet>16</a> on_stdout_line: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>str), |
| <a href=#17 id=17 data-nosnippet>17</a> on_stderr_line: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>str), |
| <a href=#18 id=18 data-nosnippet>18</a> on_eof: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(), |
| <a href=#19 id=19 data-nosnippet>19</a>) -> io::Result<(Vec<u8>, Vec<u8>)> { |
| <a href=#20 id=20 data-nosnippet>20</a> <span class="kw">let </span><span class="kw-2">mut </span>stdout = Vec::new(); |
| <a href=#21 id=21 data-nosnippet>21</a> <span class="kw">let </span><span class="kw-2">mut </span>stderr = Vec::new(); |
| <a href=#22 id=22 data-nosnippet>22</a> |
| <a href=#23 id=23 data-nosnippet>23</a> imp::read2(out, err, <span class="kw-2">&mut </span>|is_out, data, eof| { |
| <a href=#24 id=24 data-nosnippet>24</a> <span class="kw">let </span>idx = <span class="kw">if </span>eof { |
| <a href=#25 id=25 data-nosnippet>25</a> data.len() |
| <a href=#26 id=26 data-nosnippet>26</a> } <span class="kw">else </span>{ |
| <a href=#27 id=27 data-nosnippet>27</a> <span class="kw">match </span>data.iter().rposition(|<span class="kw-2">&</span>b| b == <span class="string">b'\n'</span>) { |
| <a href=#28 id=28 data-nosnippet>28</a> <span class="prelude-val">Some</span>(i) => i + <span class="number">1</span>, |
| <a href=#29 id=29 data-nosnippet>29</a> <span class="prelude-val">None </span>=> <span class="kw">return</span>, |
| <a href=#30 id=30 data-nosnippet>30</a> } |
| <a href=#31 id=31 data-nosnippet>31</a> }; |
| <a href=#32 id=32 data-nosnippet>32</a> { |
| <a href=#33 id=33 data-nosnippet>33</a> <span class="comment">// scope for new_lines |
| <a href=#34 id=34 data-nosnippet>34</a> </span><span class="kw">let </span>new_lines = { |
| <a href=#35 id=35 data-nosnippet>35</a> <span class="kw">let </span>dst = <span class="kw">if </span>is_out { <span class="kw-2">&mut </span>stdout } <span class="kw">else </span>{ <span class="kw-2">&mut </span>stderr }; |
| <a href=#36 id=36 data-nosnippet>36</a> <span class="kw">let </span>start = dst.len(); |
| <a href=#37 id=37 data-nosnippet>37</a> <span class="kw">let </span>data = data.drain(..idx); |
| <a href=#38 id=38 data-nosnippet>38</a> dst.extend(data); |
| <a href=#39 id=39 data-nosnippet>39</a> <span class="kw-2">&</span>dst[start..] |
| <a href=#40 id=40 data-nosnippet>40</a> }; |
| <a href=#41 id=41 data-nosnippet>41</a> <span class="kw">for </span>line <span class="kw">in </span>String::from_utf8_lossy(new_lines).lines() { |
| <a href=#42 id=42 data-nosnippet>42</a> <span class="kw">if </span>is_out { |
| <a href=#43 id=43 data-nosnippet>43</a> on_stdout_line(line); |
| <a href=#44 id=44 data-nosnippet>44</a> } <span class="kw">else </span>{ |
| <a href=#45 id=45 data-nosnippet>45</a> on_stderr_line(line); |
| <a href=#46 id=46 data-nosnippet>46</a> } |
| <a href=#47 id=47 data-nosnippet>47</a> } |
| <a href=#48 id=48 data-nosnippet>48</a> <span class="kw">if </span>eof { |
| <a href=#49 id=49 data-nosnippet>49</a> on_eof(); |
| <a href=#50 id=50 data-nosnippet>50</a> } |
| <a href=#51 id=51 data-nosnippet>51</a> } |
| <a href=#52 id=52 data-nosnippet>52</a> })<span class="question-mark">?</span>; |
| <a href=#53 id=53 data-nosnippet>53</a> |
| <a href=#54 id=54 data-nosnippet>54</a> <span class="prelude-val">Ok</span>((stdout, stderr)) |
| <a href=#55 id=55 data-nosnippet>55</a>} |
| <a href=#56 id=56 data-nosnippet>56</a> |
| <a href=#57 id=57 data-nosnippet>57</a><span class="doccomment">/// # Panics |
| <a href=#58 id=58 data-nosnippet>58</a>/// |
| <a href=#59 id=59 data-nosnippet>59</a>/// Panics if `cmd` is not configured to have `stdout` and `stderr` as `piped`. |
| <a href=#60 id=60 data-nosnippet>60</a></span><span class="kw">pub fn </span>spawn_with_streaming_output( |
| <a href=#61 id=61 data-nosnippet>61</a> <span class="kw-2">mut </span>cmd: Command, |
| <a href=#62 id=62 data-nosnippet>62</a> on_stdout_line: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>str), |
| <a href=#63 id=63 data-nosnippet>63</a> on_stderr_line: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(<span class="kw-2">&</span>str), |
| <a href=#64 id=64 data-nosnippet>64</a>) -> io::Result<Output> { |
| <a href=#65 id=65 data-nosnippet>65</a> <span class="kw">let </span>cmd = cmd.stdout(Stdio::piped()).stderr(Stdio::piped()).stdin(Stdio::null()); |
| <a href=#66 id=66 data-nosnippet>66</a> |
| <a href=#67 id=67 data-nosnippet>67</a> <span class="kw">let </span><span class="kw-2">mut </span>child = JodChild(cmd.spawn()<span class="question-mark">?</span>); |
| <a href=#68 id=68 data-nosnippet>68</a> <span class="kw">let </span>(stdout, stderr) = streaming_output( |
| <a href=#69 id=69 data-nosnippet>69</a> child.stdout.take().unwrap(), |
| <a href=#70 id=70 data-nosnippet>70</a> child.stderr.take().unwrap(), |
| <a href=#71 id=71 data-nosnippet>71</a> on_stdout_line, |
| <a href=#72 id=72 data-nosnippet>72</a> on_stderr_line, |
| <a href=#73 id=73 data-nosnippet>73</a> <span class="kw-2">&mut </span>|| (), |
| <a href=#74 id=74 data-nosnippet>74</a> )<span class="question-mark">?</span>; |
| <a href=#75 id=75 data-nosnippet>75</a> <span class="kw">let </span>status = child.wait()<span class="question-mark">?</span>; |
| <a href=#76 id=76 data-nosnippet>76</a> <span class="prelude-val">Ok</span>(Output { status, stdout, stderr }) |
| <a href=#77 id=77 data-nosnippet>77</a>} |
| <a href=#78 id=78 data-nosnippet>78</a> |
| <a href=#79 id=79 data-nosnippet>79</a><span class="attr">#[cfg(unix)] |
| <a href=#80 id=80 data-nosnippet>80</a></span><span class="kw">mod </span>imp { |
| <a href=#81 id=81 data-nosnippet>81</a> <span class="kw">use </span>std::{ |
| <a href=#82 id=82 data-nosnippet>82</a> io::{<span class="self">self</span>, prelude::<span class="kw-2">*</span>}, |
| <a href=#83 id=83 data-nosnippet>83</a> mem, |
| <a href=#84 id=84 data-nosnippet>84</a> os::unix::prelude::<span class="kw-2">*</span>, |
| <a href=#85 id=85 data-nosnippet>85</a> process::{ChildStderr, ChildStdout}, |
| <a href=#86 id=86 data-nosnippet>86</a> }; |
| <a href=#87 id=87 data-nosnippet>87</a> |
| <a href=#88 id=88 data-nosnippet>88</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>read2( |
| <a href=#89 id=89 data-nosnippet>89</a> <span class="kw-2">mut </span>out_pipe: ChildStdout, |
| <a href=#90 id=90 data-nosnippet>90</a> <span class="kw-2">mut </span>err_pipe: ChildStderr, |
| <a href=#91 id=91 data-nosnippet>91</a> data: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(bool, <span class="kw-2">&mut </span>Vec<u8>, bool), |
| <a href=#92 id=92 data-nosnippet>92</a> ) -> io::Result<()> { |
| <a href=#93 id=93 data-nosnippet>93</a> <span class="kw">unsafe </span>{ |
| <a href=#94 id=94 data-nosnippet>94</a> libc::fcntl(out_pipe.as_raw_fd(), libc::F_SETFL, libc::O_NONBLOCK); |
| <a href=#95 id=95 data-nosnippet>95</a> libc::fcntl(err_pipe.as_raw_fd(), libc::F_SETFL, libc::O_NONBLOCK); |
| <a href=#96 id=96 data-nosnippet>96</a> } |
| <a href=#97 id=97 data-nosnippet>97</a> |
| <a href=#98 id=98 data-nosnippet>98</a> <span class="kw">let </span><span class="kw-2">mut </span>out_done = <span class="bool-val">false</span>; |
| <a href=#99 id=99 data-nosnippet>99</a> <span class="kw">let </span><span class="kw-2">mut </span>err_done = <span class="bool-val">false</span>; |
| <a href=#100 id=100 data-nosnippet>100</a> <span class="kw">let </span><span class="kw-2">mut </span>out = Vec::new(); |
| <a href=#101 id=101 data-nosnippet>101</a> <span class="kw">let </span><span class="kw-2">mut </span>err = Vec::new(); |
| <a href=#102 id=102 data-nosnippet>102</a> |
| <a href=#103 id=103 data-nosnippet>103</a> <span class="kw">let </span><span class="kw-2">mut </span>fds: [libc::pollfd; <span class="number">2</span>] = <span class="kw">unsafe </span>{ mem::zeroed() }; |
| <a href=#104 id=104 data-nosnippet>104</a> fds[<span class="number">0</span>].fd = out_pipe.as_raw_fd(); |
| <a href=#105 id=105 data-nosnippet>105</a> fds[<span class="number">0</span>].events = libc::POLLIN; |
| <a href=#106 id=106 data-nosnippet>106</a> fds[<span class="number">1</span>].fd = err_pipe.as_raw_fd(); |
| <a href=#107 id=107 data-nosnippet>107</a> fds[<span class="number">1</span>].events = libc::POLLIN; |
| <a href=#108 id=108 data-nosnippet>108</a> <span class="kw">let </span><span class="kw-2">mut </span>nfds = <span class="number">2</span>; |
| <a href=#109 id=109 data-nosnippet>109</a> <span class="kw">let </span><span class="kw-2">mut </span>errfd = <span class="number">1</span>; |
| <a href=#110 id=110 data-nosnippet>110</a> |
| <a href=#111 id=111 data-nosnippet>111</a> <span class="kw">while </span>nfds > <span class="number">0 </span>{ |
| <a href=#112 id=112 data-nosnippet>112</a> <span class="comment">// wait for either pipe to become readable using `select` |
| <a href=#113 id=113 data-nosnippet>113</a> </span><span class="kw">let </span>r = <span class="kw">unsafe </span>{ libc::poll(fds.as_mut_ptr(), nfds, -<span class="number">1</span>) }; |
| <a href=#114 id=114 data-nosnippet>114</a> <span class="kw">if </span>r == -<span class="number">1 </span>{ |
| <a href=#115 id=115 data-nosnippet>115</a> <span class="kw">let </span>err = io::Error::last_os_error(); |
| <a href=#116 id=116 data-nosnippet>116</a> <span class="kw">if </span>err.kind() == io::ErrorKind::Interrupted { |
| <a href=#117 id=117 data-nosnippet>117</a> <span class="kw">continue</span>; |
| <a href=#118 id=118 data-nosnippet>118</a> } |
| <a href=#119 id=119 data-nosnippet>119</a> <span class="kw">return </span><span class="prelude-val">Err</span>(err); |
| <a href=#120 id=120 data-nosnippet>120</a> } |
| <a href=#121 id=121 data-nosnippet>121</a> |
| <a href=#122 id=122 data-nosnippet>122</a> <span class="comment">// Read as much as we can from each pipe, ignoring EWOULDBLOCK or |
| <a href=#123 id=123 data-nosnippet>123</a> // EAGAIN. If we hit EOF, then this will happen because the underlying |
| <a href=#124 id=124 data-nosnippet>124</a> // reader will return Ok(0), in which case we'll see `Ok` ourselves. In |
| <a href=#125 id=125 data-nosnippet>125</a> // this case we flip the other fd back into blocking mode and read |
| <a href=#126 id=126 data-nosnippet>126</a> // whatever's leftover on that file descriptor. |
| <a href=#127 id=127 data-nosnippet>127</a> </span><span class="kw">let </span>handle = |res: io::Result<<span class="kw">_</span>>| <span class="kw">match </span>res { |
| <a href=#128 id=128 data-nosnippet>128</a> <span class="prelude-val">Ok</span>(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(<span class="bool-val">true</span>), |
| <a href=#129 id=129 data-nosnippet>129</a> <span class="prelude-val">Err</span>(e) => { |
| <a href=#130 id=130 data-nosnippet>130</a> <span class="kw">if </span>e.kind() == io::ErrorKind::WouldBlock { |
| <a href=#131 id=131 data-nosnippet>131</a> <span class="prelude-val">Ok</span>(<span class="bool-val">false</span>) |
| <a href=#132 id=132 data-nosnippet>132</a> } <span class="kw">else </span>{ |
| <a href=#133 id=133 data-nosnippet>133</a> <span class="prelude-val">Err</span>(e) |
| <a href=#134 id=134 data-nosnippet>134</a> } |
| <a href=#135 id=135 data-nosnippet>135</a> } |
| <a href=#136 id=136 data-nosnippet>136</a> }; |
| <a href=#137 id=137 data-nosnippet>137</a> <span class="kw">if </span>!err_done && fds[errfd].revents != <span class="number">0 </span>&& handle(err_pipe.read_to_end(<span class="kw-2">&mut </span>err))<span class="question-mark">? </span>{ |
| <a href=#138 id=138 data-nosnippet>138</a> err_done = <span class="bool-val">true</span>; |
| <a href=#139 id=139 data-nosnippet>139</a> nfds -= <span class="number">1</span>; |
| <a href=#140 id=140 data-nosnippet>140</a> } |
| <a href=#141 id=141 data-nosnippet>141</a> data(<span class="bool-val">false</span>, <span class="kw-2">&mut </span>err, err_done); |
| <a href=#142 id=142 data-nosnippet>142</a> <span class="kw">if </span>!out_done && fds[<span class="number">0</span>].revents != <span class="number">0 </span>&& handle(out_pipe.read_to_end(<span class="kw-2">&mut </span>out))<span class="question-mark">? </span>{ |
| <a href=#143 id=143 data-nosnippet>143</a> out_done = <span class="bool-val">true</span>; |
| <a href=#144 id=144 data-nosnippet>144</a> fds[<span class="number">0</span>].fd = err_pipe.as_raw_fd(); |
| <a href=#145 id=145 data-nosnippet>145</a> errfd = <span class="number">0</span>; |
| <a href=#146 id=146 data-nosnippet>146</a> nfds -= <span class="number">1</span>; |
| <a href=#147 id=147 data-nosnippet>147</a> } |
| <a href=#148 id=148 data-nosnippet>148</a> data(<span class="bool-val">true</span>, <span class="kw-2">&mut </span>out, out_done); |
| <a href=#149 id=149 data-nosnippet>149</a> } |
| <a href=#150 id=150 data-nosnippet>150</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#151 id=151 data-nosnippet>151</a> } |
| <a href=#152 id=152 data-nosnippet>152</a>} |
| <a href=#153 id=153 data-nosnippet>153</a> |
| <a href=#154 id=154 data-nosnippet>154</a><span class="attr">#[cfg(windows)] |
| <a href=#155 id=155 data-nosnippet>155</a></span><span class="kw">mod </span>imp { |
| <a href=#156 id=156 data-nosnippet>156</a> <span class="kw">use </span>std::{ |
| <a href=#157 id=157 data-nosnippet>157</a> io, |
| <a href=#158 id=158 data-nosnippet>158</a> os::windows::prelude::<span class="kw-2">*</span>, |
| <a href=#159 id=159 data-nosnippet>159</a> process::{ChildStderr, ChildStdout}, |
| <a href=#160 id=160 data-nosnippet>160</a> slice, |
| <a href=#161 id=161 data-nosnippet>161</a> }; |
| <a href=#162 id=162 data-nosnippet>162</a> |
| <a href=#163 id=163 data-nosnippet>163</a> <span class="kw">use </span>miow::{ |
| <a href=#164 id=164 data-nosnippet>164</a> Overlapped, |
| <a href=#165 id=165 data-nosnippet>165</a> iocp::{CompletionPort, CompletionStatus}, |
| <a href=#166 id=166 data-nosnippet>166</a> pipe::NamedPipe, |
| <a href=#167 id=167 data-nosnippet>167</a> }; |
| <a href=#168 id=168 data-nosnippet>168</a> <span class="kw">use </span>windows_sys::Win32::Foundation::ERROR_BROKEN_PIPE; |
| <a href=#169 id=169 data-nosnippet>169</a> |
| <a href=#170 id=170 data-nosnippet>170</a> <span class="kw">struct </span>Pipe<<span class="lifetime">'a</span>> { |
| <a href=#171 id=171 data-nosnippet>171</a> dst: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Vec<u8>, |
| <a href=#172 id=172 data-nosnippet>172</a> overlapped: Overlapped, |
| <a href=#173 id=173 data-nosnippet>173</a> pipe: NamedPipe, |
| <a href=#174 id=174 data-nosnippet>174</a> done: bool, |
| <a href=#175 id=175 data-nosnippet>175</a> } |
| <a href=#176 id=176 data-nosnippet>176</a> |
| <a href=#177 id=177 data-nosnippet>177</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>read2( |
| <a href=#178 id=178 data-nosnippet>178</a> out_pipe: ChildStdout, |
| <a href=#179 id=179 data-nosnippet>179</a> err_pipe: ChildStderr, |
| <a href=#180 id=180 data-nosnippet>180</a> data: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(bool, <span class="kw-2">&mut </span>Vec<u8>, bool), |
| <a href=#181 id=181 data-nosnippet>181</a> ) -> io::Result<()> { |
| <a href=#182 id=182 data-nosnippet>182</a> <span class="kw">let </span><span class="kw-2">mut </span>out = Vec::new(); |
| <a href=#183 id=183 data-nosnippet>183</a> <span class="kw">let </span><span class="kw-2">mut </span>err = Vec::new(); |
| <a href=#184 id=184 data-nosnippet>184</a> |
| <a href=#185 id=185 data-nosnippet>185</a> <span class="kw">let </span>port = CompletionPort::new(<span class="number">1</span>)<span class="question-mark">?</span>; |
| <a href=#186 id=186 data-nosnippet>186</a> port.add_handle(<span class="number">0</span>, <span class="kw-2">&</span>out_pipe)<span class="question-mark">?</span>; |
| <a href=#187 id=187 data-nosnippet>187</a> port.add_handle(<span class="number">1</span>, <span class="kw-2">&</span>err_pipe)<span class="question-mark">?</span>; |
| <a href=#188 id=188 data-nosnippet>188</a> |
| <a href=#189 id=189 data-nosnippet>189</a> <span class="kw">unsafe </span>{ |
| <a href=#190 id=190 data-nosnippet>190</a> <span class="kw">let </span><span class="kw-2">mut </span>out_pipe = Pipe::new(out_pipe, <span class="kw-2">&mut </span>out); |
| <a href=#191 id=191 data-nosnippet>191</a> <span class="kw">let </span><span class="kw-2">mut </span>err_pipe = Pipe::new(err_pipe, <span class="kw-2">&mut </span>err); |
| <a href=#192 id=192 data-nosnippet>192</a> |
| <a href=#193 id=193 data-nosnippet>193</a> out_pipe.read()<span class="question-mark">?</span>; |
| <a href=#194 id=194 data-nosnippet>194</a> err_pipe.read()<span class="question-mark">?</span>; |
| <a href=#195 id=195 data-nosnippet>195</a> |
| <a href=#196 id=196 data-nosnippet>196</a> <span class="kw">let </span><span class="kw-2">mut </span>status = [CompletionStatus::zero(), CompletionStatus::zero()]; |
| <a href=#197 id=197 data-nosnippet>197</a> |
| <a href=#198 id=198 data-nosnippet>198</a> <span class="kw">while </span>!out_pipe.done || !err_pipe.done { |
| <a href=#199 id=199 data-nosnippet>199</a> <span class="kw">for </span>status <span class="kw">in </span>port.get_many(<span class="kw-2">&mut </span>status, <span class="prelude-val">None</span>)<span class="question-mark">? </span>{ |
| <a href=#200 id=200 data-nosnippet>200</a> <span class="kw">if </span>status.token() == <span class="number">0 </span>{ |
| <a href=#201 id=201 data-nosnippet>201</a> out_pipe.complete(status); |
| <a href=#202 id=202 data-nosnippet>202</a> data(<span class="bool-val">true</span>, out_pipe.dst, out_pipe.done); |
| <a href=#203 id=203 data-nosnippet>203</a> out_pipe.read()<span class="question-mark">?</span>; |
| <a href=#204 id=204 data-nosnippet>204</a> } <span class="kw">else </span>{ |
| <a href=#205 id=205 data-nosnippet>205</a> err_pipe.complete(status); |
| <a href=#206 id=206 data-nosnippet>206</a> data(<span class="bool-val">false</span>, err_pipe.dst, err_pipe.done); |
| <a href=#207 id=207 data-nosnippet>207</a> err_pipe.read()<span class="question-mark">?</span>; |
| <a href=#208 id=208 data-nosnippet>208</a> } |
| <a href=#209 id=209 data-nosnippet>209</a> } |
| <a href=#210 id=210 data-nosnippet>210</a> } |
| <a href=#211 id=211 data-nosnippet>211</a> |
| <a href=#212 id=212 data-nosnippet>212</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#213 id=213 data-nosnippet>213</a> } |
| <a href=#214 id=214 data-nosnippet>214</a> } |
| <a href=#215 id=215 data-nosnippet>215</a> |
| <a href=#216 id=216 data-nosnippet>216</a> <span class="kw">impl</span><<span class="lifetime">'a</span>> Pipe<<span class="lifetime">'a</span>> { |
| <a href=#217 id=217 data-nosnippet>217</a> <span class="kw">unsafe fn </span>new<P: IntoRawHandle>(p: P, dst: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Vec<u8>) -> Pipe<<span class="lifetime">'a</span>> { |
| <a href=#218 id=218 data-nosnippet>218</a> <span class="kw">let </span>pipe = <span class="kw">unsafe </span>{ NamedPipe::from_raw_handle(p.into_raw_handle()) }; |
| <a href=#219 id=219 data-nosnippet>219</a> Pipe { dst, pipe, overlapped: Overlapped::zero(), done: <span class="bool-val">false </span>} |
| <a href=#220 id=220 data-nosnippet>220</a> } |
| <a href=#221 id=221 data-nosnippet>221</a> |
| <a href=#222 id=222 data-nosnippet>222</a> <span class="kw">unsafe fn </span>read(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<()> { |
| <a href=#223 id=223 data-nosnippet>223</a> <span class="kw">let </span>dst = <span class="kw">unsafe </span>{ slice_to_end(<span class="self">self</span>.dst) }; |
| <a href=#224 id=224 data-nosnippet>224</a> <span class="kw">match unsafe </span>{ <span class="self">self</span>.pipe.read_overlapped(dst, <span class="self">self</span>.overlapped.raw()) } { |
| <a href=#225 id=225 data-nosnippet>225</a> <span class="prelude-val">Ok</span>(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(()), |
| <a href=#226 id=226 data-nosnippet>226</a> <span class="prelude-val">Err</span>(e) => { |
| <a href=#227 id=227 data-nosnippet>227</a> <span class="kw">if </span>e.raw_os_error() == <span class="prelude-val">Some</span>(ERROR_BROKEN_PIPE <span class="kw">as </span>i32) { |
| <a href=#228 id=228 data-nosnippet>228</a> <span class="self">self</span>.done = <span class="bool-val">true</span>; |
| <a href=#229 id=229 data-nosnippet>229</a> <span class="prelude-val">Ok</span>(()) |
| <a href=#230 id=230 data-nosnippet>230</a> } <span class="kw">else </span>{ |
| <a href=#231 id=231 data-nosnippet>231</a> <span class="prelude-val">Err</span>(e) |
| <a href=#232 id=232 data-nosnippet>232</a> } |
| <a href=#233 id=233 data-nosnippet>233</a> } |
| <a href=#234 id=234 data-nosnippet>234</a> } |
| <a href=#235 id=235 data-nosnippet>235</a> } |
| <a href=#236 id=236 data-nosnippet>236</a> |
| <a href=#237 id=237 data-nosnippet>237</a> <span class="kw">unsafe fn </span>complete(<span class="kw-2">&mut </span><span class="self">self</span>, status: <span class="kw-2">&</span>CompletionStatus) { |
| <a href=#238 id=238 data-nosnippet>238</a> <span class="kw">let </span>prev = <span class="self">self</span>.dst.len(); |
| <a href=#239 id=239 data-nosnippet>239</a> <span class="kw">unsafe </span>{ <span class="self">self</span>.dst.set_len(prev + status.bytes_transferred() <span class="kw">as </span>usize) }; |
| <a href=#240 id=240 data-nosnippet>240</a> <span class="kw">if </span>status.bytes_transferred() == <span class="number">0 </span>{ |
| <a href=#241 id=241 data-nosnippet>241</a> <span class="self">self</span>.done = <span class="bool-val">true</span>; |
| <a href=#242 id=242 data-nosnippet>242</a> } |
| <a href=#243 id=243 data-nosnippet>243</a> } |
| <a href=#244 id=244 data-nosnippet>244</a> } |
| <a href=#245 id=245 data-nosnippet>245</a> |
| <a href=#246 id=246 data-nosnippet>246</a> <span class="kw">unsafe fn </span>slice_to_end(v: <span class="kw-2">&mut </span>Vec<u8>) -> <span class="kw-2">&mut </span>[u8] { |
| <a href=#247 id=247 data-nosnippet>247</a> <span class="kw">if </span>v.capacity() == <span class="number">0 </span>{ |
| <a href=#248 id=248 data-nosnippet>248</a> v.reserve(<span class="number">16</span>); |
| <a href=#249 id=249 data-nosnippet>249</a> } |
| <a href=#250 id=250 data-nosnippet>250</a> <span class="kw">if </span>v.capacity() == v.len() { |
| <a href=#251 id=251 data-nosnippet>251</a> v.reserve(<span class="number">1</span>); |
| <a href=#252 id=252 data-nosnippet>252</a> } |
| <a href=#253 id=253 data-nosnippet>253</a> <span class="kw">let </span>data = <span class="kw">unsafe </span>{ v.as_mut_ptr().add(v.len()) }; |
| <a href=#254 id=254 data-nosnippet>254</a> <span class="kw">let </span>len = v.capacity() - v.len(); |
| <a href=#255 id=255 data-nosnippet>255</a> <span class="kw">unsafe </span>{ slice::from_raw_parts_mut(data, len) } |
| <a href=#256 id=256 data-nosnippet>256</a> } |
| <a href=#257 id=257 data-nosnippet>257</a>} |
| <a href=#258 id=258 data-nosnippet>258</a> |
| <a href=#259 id=259 data-nosnippet>259</a><span class="attr">#[cfg(target_arch = <span class="string">"wasm32"</span>)] |
| <a href=#260 id=260 data-nosnippet>260</a></span><span class="kw">mod </span>imp { |
| <a href=#261 id=261 data-nosnippet>261</a> <span class="kw">use </span>std::{ |
| <a href=#262 id=262 data-nosnippet>262</a> io, |
| <a href=#263 id=263 data-nosnippet>263</a> process::{ChildStderr, ChildStdout}, |
| <a href=#264 id=264 data-nosnippet>264</a> }; |
| <a href=#265 id=265 data-nosnippet>265</a> |
| <a href=#266 id=266 data-nosnippet>266</a> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>read2( |
| <a href=#267 id=267 data-nosnippet>267</a> _out_pipe: ChildStdout, |
| <a href=#268 id=268 data-nosnippet>268</a> _err_pipe: ChildStderr, |
| <a href=#269 id=269 data-nosnippet>269</a> _data: <span class="kw-2">&mut </span><span class="kw">dyn </span>FnMut(bool, <span class="kw-2">&mut </span>Vec<u8>, bool), |
| <a href=#270 id=270 data-nosnippet>270</a> ) -> io::Result<()> { |
| <a href=#271 id=271 data-nosnippet>271</a> <span class="macro">panic!</span>(<span class="string">"no processes on wasm"</span>) |
| <a href=#272 id=272 data-nosnippet>272</a> } |
| <a href=#273 id=273 data-nosnippet>273</a>}</code></pre></div></section></main></body></html> |
