Mercurial > hg > rlgwebd
view termemu-keys.js @ 165:59e62710cbb5
rlgwebd.js: prevent races when reading ttyrecs.
DglSession objects read a 12-byte TTYREC header, extract therefrom the
length of the data chunk, and then read the data. In between these two
reads, the file watcher could trigger another readchunk() invocation,
which might attempt to read a header from the beginning of the data
chunk. This usually results in expecting a data chunk of several GB
and failing to create a Buffer for it.
The race is remedied by setting a flag on the DglSession object
whenever readchunk() is called, clearing it when both reads complete,
and refusing to read if it is already set.
author | John "Elwin" Edwards |
---|---|
date | Wed, 07 Jan 2015 13:18:35 -0500 |
parents | 6cfaf6d202be |
children |
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/* termemu-keys.js: some key-handling code common to both drivers. */ /* ASCII values of keys 0-9. */ var numShifts = [41, 33, 64, 35, 36, 37, 94, 38, 42, 40]; var keyHexCodes = { init: function () { this[13] = ["0d", "0d"]; // return this[32] = ["20", "20"]; // space this[9] = ["09", "09"]; // tab this[192] = ["60", "7e"]; // backtick, tilde this[219] = ["5b", "7b"]; // open bracket, open brace this[221] = ["5d", "7d"]; // close bracket, close brace this[220] = ["5c", "7c"]; // backslash, pipe this[59] = ["3b", "3a"]; // semicolon, colon this[186] = ["3b", "3a"]; // semicolon, colon (Chrome) this[222] = ["27", "22"]; // single quote, double quote this[188] = ["2c", "3c"]; // comma, less than this[190] = ["2e", "3e"]; // period, right angle this[191] = ["2f", "3f"]; // slash, question mark this[61] = ["3d", "2b"]; // equal, plus this[187] = ["3d", "2b"]; // equal, plus (Chrome) this[109] = ["2d", "5f"]; // subtract, underscore (maybe on numpad) this[173] = ["2d", "5f"]; // subtract, underscore (maybe not on numpad) this[189] = ["2d", "5f"]; // subtract, underscore (Chrome) this[8] = ["08", "08"]; // backspace this[46] = ["1b5b337e", "1b5b337e"]; // delete this[27] = ["1b", "1b"]; // escape this[33] = ["1b5b357e", "1b5b357e"]; // page up this[34] = ["1b5b367e", "1b5b367e"]; // page down this[12] = ["1b5b45", "1b5b45"]; // Clear key = numpad 5 (Firefox) this.appCursor(false); this.appKeypad(false); }, /* Multi-char control sequences! Neat! */ appCursor: function (on) { /* Aren't special keys vile? */ if (on) { this[37] = ["1b4f44", "1b4f44"]; // left arror this[39] = ["1b4f43", "1b4f43"]; // right arrow this[38] = ["1b4f41", "1b4f41"]; // up arrow this[40] = ["1b4f42", "1b4f42"]; // down arrow this[35] = ["1b4f46", "1b4f46"]; // end this[36] = ["1b4f48", "1b4f48"]; // home } else { this[37] = ["1b5b44", "1b5b44"]; // left arror this[39] = ["1b5b43", "1b5b43"]; // right arrow this[38] = ["1b5b41", "1b5b41"]; // up arrow this[40] = ["1b5b42", "1b5b42"]; // down arrow this[35] = ["1b5b46", "1b5b46"]; // end this[36] = ["1b5b48", "1b5b48"]; // home } }, appKeypad: function (on) { /* In theory, these should produce either numerals or the k[a-c][1-3] * sequences. Since we can't count on the terminfo description actually * containing those sequences, pretend they're just arrow keys etc. */ this[97] = ["1b4f46", "1b4f46"]; this[98] = ["1b4f42", "1b4f42"]; this[99] = ["1b5b367e", "1b5b367e"]; this[100] = ["1b4f44", "1b4f44"]; this[101] = ["1b5b45", "1b5b45"]; this[102] = ["1b4f43", "1b4f43"]; this[103] = ["1b4f48", "1b4f48"]; this[104] = ["1b4f41", "1b4f41"]; this[105] = ["1b5b357e", "1b5b357e"]; return; } };