CODEWITHSUNDEEP
bashescapingsequences
J Evans
J Evans

Reputation: 1122

Cygwin BASH and ANSI control sequences

Several things here:

  1. Can anyone point me at C code to decode ANSI console escape sequences?
  2. Is there a way to get Cygwin BASH to emulate a dumb old TTY?

Maybe this should be 2 questions.

Thanks.

Upvotes: 1

Views: 3052

Answers (2)

Jonathan Leffler
Jonathan Leffler

Reputation: 755026

It's a somewhat indirect answer, but the GNU ncurses library handles terminals of all sorts. One way of finding out which control sequences are applicable to ANSI terminals would be to decompile an ANSI terminal description:

infocmp ansi

This would give you the set of terminfo attributes that are used by curses programs to achieve effects on an ANSI terminal. Of course, you then have to know what those hieroglyphs mean.

On Cygwin, I got:

$ infocmp ansi
#       Reconstructed via infocmp from file: /usr/share/terminfo/61/ansi
ansi|ansi/pc-term compatible with color,
    am, mc5i, mir, msgr,
    colors#8, cols#80, it#8, lines#24, ncv#3, pairs#64,
    acsc=+\020\,\021\030.^Y0\333`\004a\261f\370g\361h\260j\331k\277l\332m\300n\305o~p\304q\304r\304s_t\303u\264v\301w\302x\263y\363z\362{\343|\330}\234~\376,
    bel=^G, blink=\E[5m, bold=\E[1m, cbt=\E[Z, clear=\E[H\E[J,
    cr=^M, cub=\E[%p1%dD, cub1=\E[D, cud=\E[%p1%dB, cud1=\E[B,
    cuf=\E[%p1%dC, cuf1=\E[C, cup=\E[%i%p1%d;%p2%dH,
    cuu=\E[%p1%dA, cuu1=\E[A, dch=\E[%p1%dP, dch1=\E[P,
    dl=\E[%p1%dM, dl1=\E[M, ech=\E[%p1%dX, ed=\E[J, el=\E[K,
    el1=\E[1K, home=\E[H, hpa=\E[%i%p1%dG, ht=\E[I, hts=\EH,
    ich=\E[%p1%d@, il=\E[%p1%dL, il1=\E[L, ind=^J,
    indn=\E[%p1%dS, invis=\E[8m, kbs=^H, kcbt=\E[Z, kcub1=\E[D,
    kcud1=\E[B, kcuf1=\E[C, kcuu1=\E[A, khome=\E[H, kich1=\E[L,
    mc4=\E[4i, mc5=\E[5i, nel=\r\E[S, op=\E[39;49m,
    rep=%p1%c\E[%p2%{1}%-%db, rev=\E[7m, rin=\E[%p1%dT,
    rmacs=\E[10m, rmpch=\E[10m, rmso=\E[m, rmul=\E[m,
    s0ds=\E(B, s1ds=\E)B, s2ds=\E*B, s3ds=\E+B,
    setab=\E[4%p1%dm, setaf=\E[3%p1%dm,
    sgr=\E[0;10%?%p1%t;7%;%?%p2%t;4%;%?%p3%t;7%;%?%p4%t;5%;%?%p6%t;1%;%?%p7%t;8%;%?%p9%t;11%;m,
    sgr0=\E[0;10m, smacs=\E[11m, smpch=\E[11m, smso=\E[7m,
    smul=\E[4m, tbc=\E[3g, u6=\E[%i%d;%dR, u7=\E[6n,
    u8=\E[?%[;0123456789]c, u9=\E[c, vpa=\E[%i%p1%dd,

$

The '\E' notation refers to the ESC character.

Failing that, you could look up the standard itself.

Upvotes: 4

EFraim
EFraim

Reputation: 13058

Tweaking the TERM environment variable might make applications based on terminfo/termcap avoid using advanced escape sequences. (export TERM=dumb) I am not sure that's what you want, though.

Upvotes: 3

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