Richard Hector wrote:
On 02/03/13 08:46, Thomas D. Dean wrote:
On 03/01/13 11:35, Thomas D. Dean wrote:
The ANSI standard lists ESC[4m as the code to produce an underline
> export TERM=ansi80x25
> printf "\033[4masdfasdfasdf"
produces green text, not underline text as stated in the standard.
If I put the same in c code, it works
#include <stdio.h>
int main() {
fputs("\033[4masdfasdf",stdout);
return 0;
}
I get underlined text.
I ran the C example in an xterm on Ubuntu!
The question remains.
Why does this produce color rather than underlined text?
The standard says ESC[32m should produce green text and ESC[4m should
produce underlined text.
Are you doing this on a (colour) linux console, rather than an xterm?
Apparently it can't do underline, and simulates it with a different
colour instead. See 'man console_codes', or here:
https://www.kernel.org/doc/man-pages/online/page/man4/console_codes.4.html
404 File not found.
Hugo
I don't think setting TERM will make any difference; it's your program
that has to interpret that (usually via terminfo and associated
libraries) and send the correct escape sequences - but you're sending
them yourself anyway.
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