view contrib/logo-droplets.svg @ 45095:8e04607023e5

procutil: ensure that procutil.std{out,err}.write() writes all bytes

Python 3 offers different kind of streams and it’s not guaranteed for all of
them that calling write() writes all bytes.

When Python is started in unbuffered mode, sys.std{out,err}.buffer are
instances of io.FileIO, whose write() can write less bytes for
platform-specific reasons (e.g. Linux has a 0x7ffff000 bytes maximum and could
write less if interrupted by a signal; when writing to Windows consoles, it’s
limited to 32767 bytes to avoid the "not enough space" error). This can lead to
silent loss of data, both when using sys.std{out,err}.buffer (which may in fact
not be a buffered stream) and when using the text streams sys.std{out,err}
(I’ve created a CPython bug report for that:
https://bugs.python.org/issue41221).

Python may fix the problem at some point. For now, we implement our own wrapper
for procutil.std{out,err} that calls the raw stream’s write() method until all
bytes have been written. We don’t use sys.std{out,err} for larger writes, so I
think it’s not worth the effort to patch them.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->
<svg id="Layer_1" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" xml:space="preserve" height="120" width="100" version="1.0" xmlns:cc="http://web.resource.org/cc/" xmlns:dc="http://purl.org/dc/elements/1.1/" viewBox="0 0 124.766 152.099"><metadata id="metadata6845"><rdf:RDF><cc:Work rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/><dc:title>Mercurial &quot;droplets&quot; logo</dc:title><dc:creator><cc:Agent><dc:title>Cali Mastny and Matt Mackall</dc:title></cc:Agent></dc:creator><cc:license rdf:resource="http://creativecommons.org/licenses/GPL/2.0/"/><dc:date>Feb 12 2008</dc:date></cc:Work><cc:License rdf:about="http://creativecommons.org/licenses/GPL/2.0/"><cc:permits rdf:resource="http://web.resource.org/cc/Reproduction"/><cc:permits rdf:resource="http://web.resource.org/cc/Distribution"/><cc:requires rdf:resource="http://web.resource.org/cc/Notice"/><cc:permits rdf:resource="http://web.resource.org/cc/DerivativeWorks"/><cc:requires rdf:resource="http://web.resource.org/cc/ShareAlike"/><cc:requires rdf:resource="http://web.resource.org/cc/SourceCode"/></cc:License></rdf:RDF></metadata>
<rect id="rect6847" stroke-linejoin="miter" style="stroke-dasharray:none;" height="150.12" width="124.77" stroke="#000" stroke-miterlimit="4" y="0.98776" x="0.3169" stroke-width="1.9755" fill="#FFF"/><path id="text2611" style="stroke-dasharray:none;" d="M9.848,124.61c1.777-0.79,3.665-1.18,5.479-1.18,1.74,0,2.851,0.43,3.48,1.32,1.332-0.89,3.146-1.32,4.553-1.32,4.221,0,4.369,1.71,4.369,6.73v11.11c0,0.49,0.074,0.49-2.036,0.49v-11.81c0-3.63-0.074-4.74-2.48-4.74-1.073,0-2.184,0.25-3.369,1.03v15.27c-0.037,0.15-0.111,0.18-0.369,0.22-0.038,0-0.074,0.03-0.112,0.03h-1.555v-11.81c0-3.49,0-4.77-2.517-4.77-1.074,0-2.147,0.21-3.406,0.82v15.27c0,0.49,0.074,0.49-2.0361,0.49v-17.15m27.831-1.18c-3.146,0-6.626,0.89-6.626,10.4,0,7.33,2.554,8.47,6.071,8.47,2.701,0,5.034-0.89,5.034-1.32,0-0.53-0.074-1.35-0.259-1.82-1.148,0.79-2.777,1.21-4.59,1.21-2.48,0-4.146-0.71-4.184-6.22,1.629,0,5.776-0.04,8.848-0.65,0.259-1.17,0.37-2.88,0.37-4.37,0-3.56-1.444-5.7-4.664-5.7m-0.185,1.78c2.221,0,2.813,1.46,2.85,4.31,0,0.75-0.037,1.64-0.148,2.49-2.073,0.5-5.591,0.5-7.072,0.5,0.261-6.48,2.481-7.3,4.37-7.3m8.07-0.21c1.739-1.14,3.332-1.57,4.961-1.57,1.814,0,2.666,0.5,2.666,1.11,0,0.35-0.112,0.96-0.297,1.31-0.519-0.28-1.11-0.53-2.074-0.53-1.184,0-2.295,0.32-3.183,1.1v14.85c0,0.49,0.037,0.49-2.073,0.49v-16.76m18.69-0.39c0-0.47-1.554-1.18-3.11-1.18-2.999,0-6.664,1.03-6.664,9.83,0,8.33,2.222,9.07,6.109,9.07,1.924,0,3.665-1.03,3.665-1.6,0-0.32-0.074-0.82-0.26-1.24-0.778,0.56-1.962,1.1-3.22,1.1-2.665,0-4.22-0.75-4.22-7.23,0-7.15,2.554-8.15,4.775-8.15,1.258,0,1.962,0.36,2.665,0.82,0.186-0.43,0.26-1.03,0.26-1.42m14.181,16.55c-1.63,0.82-3.776,1.14-5.627,1.14-4.739,0-5.442-1.99-5.442-6.73v-11.14c0-0.46-0.037-0.46,2.074-0.46v11.82c0,3.56,0.517,4.77,3.294,4.77,1.073,0,2.554-0.22,3.665-0.86v-15.27c0-0.46-0.074-0.46,2.036-0.46v17.19m4.221-16.16c1.739-1.14,3.332-1.57,4.96-1.57,1.814,0,2.666,0.5,2.666,1.11,0,0.35-0.111,0.96-0.296,1.31-0.519-0.28-1.111-0.53-2.074-0.53-1.184,0-2.295,0.32-3.183,1.1v14.85c0,0.49,0.037,0.49-2.073,0.49v-16.76m12.379-1.03c-1.629,0-2.11,0-2.11,0.96v16.83c2.073,0,2.11,0,2.11-0.49v-17.3m-2.184-6.27c0,1.18,0.37,1.6,1.11,1.64,0.851,0,1.259-0.61,1.259-1.67,0.037-1.11-0.26-1.61-1.111-1.61-0.814,0-1.221,0.61-1.258,1.64m5.696,7.3c0-0.39,0.074-0.61,0.222-0.71,0.704-0.39,3.41-0.86,6.48-0.86,2.33,0,3.81,1.11,3.81,4.31v2.31c0,6.34-0.18,11.07-0.18,11.07-0.85,0.47-2.45,1.18-5.04,1.18-2.66,0.03-5.329-0.22-5.329-5.48,0-5.02,2.739-5.81,5.479-5.81,1.04,0,2.26,0.11,3.07,0.43v-3.31c0-2.31-1.18-2.81-2.59-2.81-1.89,0-4.514,0.35-5.662,0.89-0.222-0.39-0.26-1-0.26-1.21m8.512,7.9c-0.7-0.25-1.7-0.35-2.4-0.35-2.11,0-4.04,0.42-4.04,4.34,0,3.66,1.59,3.7,3.48,3.7,1.19,0,2.37-0.32,2.78-0.75,0,0,0.18-4.27,0.18-6.94m7.86,8.37c0,0.49,0.04,0.49-2.04,0.49v-25.2c0-0.96,0.41-0.96,2.04-0.96v25.67" stroke-miterlimit="4" stroke-width="2.02999997" fill="#010101"/><g id="g4503" transform="matrix(0.9351326,0,0,0.9351326,150.39508,-1.251766)"><path id="path2339" fill="#1b1a1b" d="M-45.75,92.692c20.04-33.321-4.232-87.363-48.614-81.873-40.096,4.958-40.746,47.165-5.405,57.191,30.583,8.685,6.318,28.084,7.027,41,0.712,12.92,26.587,17.6,46.992-16.318z"/><circle id="circle2341" transform="matrix(1.0917947,-0.2858168,0.2858168,1.0917947,-180.30817,13.494135)" cy="85.364" cx="33.728" r="15.414" fill="#1b1a1b"/><path id="path2343" fill="#1b1a1b" d="M-140.06,48.936c-6.26,0.606-10.84,6.164-10.24,12.422,0.61,6.262,6.17,10.847,12.43,10.241,6.26-0.614,10.84-6.171,10.23-12.43-0.61-6.253-6.16-10.839-12.42-10.233z"/><path id="path2561" fill="#bfbfbf" d="M-44.993,91.34c20.041-33.321-4.231-87.363-48.613-81.873-40.104,4.9568-40.744,47.166-5.406,57.193,30.583,8.684,6.318,28.083,7.027,41,0.713,12.92,26.587,17.6,46.992-16.32z"/><path id="path2563" fill="#000" d="M-86.842,112.76c-1.215-1.97,0.642-4.16,2.551-3.99,3.039,0.26,9.655-0.04,14.876-3,13.043-7.39,33.114-42.966,23.019-65.405-4.519-10.044-6.72-12.92-11.374-17.833-0.95-1.002-0.405-0.948,0.238-0.609,2.517,1.321,6.94,6.437,11.477,14.765,7.664,14.069,7.267,30.795,4.416,41.287-1.986,7.299-8.825,23.815-18.842,30.955-10.039,7.15-21.785,11.26-26.361,3.83z"/><path id="path2565" fill="#000" d="M-95.93,66.591c-6.83-2.028-15.64-4.853-20.74-11.517-3.75-4.914-5.66-10.277-6.15-13.318-0.17-1.085-0.32-1.991-0.01-2.24,0.15-0.117,2.81,5.896,6.79,10.936,3.97,5.04,9.53,7.988,14.16,9.059,4.117,0.952,12.646,3.044,15.532,5.503,2.967,2.527,3.215,7.987,2.216,8.603-1.006,0.62-3.048-4.429-11.798-7.026z"/><path id="path2567" fill="#FFF" d="M-81.841,113.72c-0.132,1.57,1.665,1.87,4.083,1.51,3.099-0.46,5.72-0.81,9.287-2.6,4.835-2.42,9.728-5.89,13.312-10.57,10.692-13.945,14.478-30.45,13.895-32.824-0.195,1.961-2.776,12.253-8.679,21.532-7.582,11.922-13.079,18.262-25.758,21.342-3.529,0.86-5.967-0.45-6.14,1.61z"/><path id="path2569" fill="#FFF" d="M-109.96,59.479c1.44,1.225,4.4,2.857,10.223,4.767,7.031,2.305,10.455,4.304,11.888,5.262,1.52,1.018,2.483,3.288,2.578,1.272,0.099-2.019-1.145-3.755-3.921-4.675-1.878-0.624-5.038-2.109-8.067-2.707-1.946-0.384-5.111-1.146-7.831-1.978-1.48-0.457-3-1.258-4.87-1.941z"/><circle id="circle2577" transform="matrix(1.0917947,-0.2858168,0.2858168,1.0917947,-180.30817,13.494135)" cy="84.375" cx="34.681" r="15.414" fill="#bfbfbf"/><path id="path2579" fill="#000" d="M-128.68,108.38c13.53,12.54,33.894-4.69,24.93-19.897-1.01-1.708-2.32-3.009-1.89-1.7,2.87,8.747,0.22,15.667-4.72,19.227-4.85,3.5-11.51,4.09-16.84,1.32-1.57-0.81-2.22,0.37-1.48,1.05z"/><path id="path2585" fill="#FFF" d="M-118.07,110.95c1.73-0.36,11.75-2.95,14.1-11.194,0.73-2.569,0.86-2.053,0.66-0.661-1.06,7.105-7.78,12.345-13.49,12.545-1.16,0.12-2.68-0.39-1.27-0.69z"/><path id="path2589" fill="#bfbfbf" d="M-139.3,47.584c-6.26,0.605-10.84,6.164-10.24,12.422,0.61,6.261,6.17,10.847,12.43,10.241,6.25-0.614,10.84-6.173,10.23-12.431-0.61-6.254-6.17-10.838-12.42-10.232z"/><path id="path2591" fill="#000" d="M-144.47,67.571c0.07,0.805,1.17,1.838,2.9,2.312,1.49,0.408,5.32,1.45,10.25-1.658,4.92-3.108,5.49-11.421,3.25-13.865-0.69-1.239-1.59-2.14-0.88-0.164,1.81,4.99-1.7,9.659-4.74,11.82-3.03,2.162-6.88,1.139-8.45,0.66s-2.4,0.064-2.33,0.895z"/><path id="path2597" fill="#FFF" d="M-138.11,68.688c0.45-0.406,2.73-0.24,4.79-1.35,2.07-1.109,4.52-3.54,4.95-6.994,0.26-2.029,0.34-1.519,0.44-0.415-0.32,5.743-5.6,8.916-8.62,9.334-0.82,0.113-2.25,0.044-1.56-0.575z"/><path id="path2561_1_" fill="#999" d="M-47.767,69.694c8.532-24.594-9.323-61.736-45.446-57.268-32.637,4.035-33.167,38.389-4.4,46.55,32.582,4.933,12.962,29.512,10.179,41.904-2.495,11.11,26.331,12.94,39.667-31.186z"/><path id="path2571" fill="#f3f3f3" d="M-70.093,88.904c-8.827-1.092-21.529,18.836-9.552,16.506,5.756-0.86,10.525-2.89,14.794-7.762,5.567-6.353,13.883-20.074,16.288-28.94,2.025-7.476,1.007-19.057-1.081-8.175-2.142,11.167-11.623,29.464-20.449,28.371z"/><path id="path2581" fill="#999" d="M-129.39,104.85c2.05,0.03,3.28,0.32,5.35,1.77,4.09,1.7,11.61,0.62,15.09-3.95,3.47-4.57,3.58-10.868,2.26-14.674-3.24-9.314-16.99-9.149-23.13-1.417-6.64,8.636-1.61,18.231,0.43,18.271z"/><path id="path2593_2_" fill="#999" d="M-147.64,61.684c0.41,1.282,1.45,3.154,3.65,3.466,2.94,0.417,3.54,1.743,7,1.055,3.47-0.688,6.09-3.528,7.14-6.67,1.21-4.347-0.59-6.591-3.31-8.595-2.71-2.003-8.67-1.788-12.23,1.458-2.53,2.305-3.24,6.163-2.25,9.286z"/><path id="path256" fill="#f3f3f3" d="M-136.11,64.558c2.66-0.697,6.18-4.325,4.44-7.096-2.16-3.413-8.17-0.491-8.37,3.309-0.21,3.802,1.11,4.526,3.93,3.787z"/><path id="path258" fill="#f3f3f3" d="M-116.12,105.51c2.28-0.6,9.24-3.43,7.93-13.547-0.66-5.126-3.46,6.361-8.63,8.077-7.85,2.61-6.97,7.48,0.7,5.47z"/></g>
</svg>