According to ECMA-48¹ 8.3.117, an attribute value of 21 is "doubly underlined", while 22 is "normal colour or normal intensity (neither bold nor faint)".
Additionally, 25 is "steady (not blinking)", which likely means neither slow blink nor fast blink. ¹: http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-048.pdf --- st.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/st.c b/st.c index 546db41..0c917fd 100644 --- a/st.c +++ b/st.c @@ -1718,11 +1718,8 @@ tsetattr(int *attr, int l) { case 9: term.c.attr.mode |= ATTR_STRUCK; break; - case 21: - term.c.attr.mode &= ~ATTR_BOLD; - break; case 22: - term.c.attr.mode &= ~ATTR_FAINT; + term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT); break; case 23: term.c.attr.mode &= ~ATTR_ITALIC; @@ -1731,10 +1728,7 @@ tsetattr(int *attr, int l) { term.c.attr.mode &= ~ATTR_UNDERLINE; break; case 25: - term.c.attr.mode &= ~ATTR_BLINK; - break; - case 26: - term.c.attr.mode &= ~ATTR_FASTBLINK; + term.c.attr.mode &= ~(ATTR_BLINK | ATTR_FASTBLINK); break; case 27: term.c.attr.mode &= ~ATTR_REVERSE; -- 1.8.5.1
