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Clear input, output, control and local flags before copying them

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from the source terminal.  Otherwise, flags that are disabled
in the source terminal may still be enabled in the destination.
This commit is contained in:
Todd C. Miller
2017-07-12 05:47:28 -06:00
parent e70a953fb4
commit 6505d05803
1 changed files with 10 additions and 4 deletions
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14
lib/util/term.c
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@@ -262,11 +262,17 @@ sudo_term_copy_v1(int src, int dst)
if (tcgetattr(src, &tt_src) != 0 || tcgetattr(dst, &tt_dst) != 0)
debug_return_bool(false);
/* Clear select input, output, control and local flags. */
CLR(tt_dst.c_iflag, INPUT_FLAGS);
CLR(tt_dst.c_oflag, OUTPUT_FLAGS);
CLR(tt_dst.c_cflag, CONTROL_FLAGS);
CLR(tt_dst.c_lflag, LOCAL_FLAGS);
/* Copy select input, output, control and local flags. */
tt_dst.c_iflag |= (tt_src.c_iflag & INPUT_FLAGS);
tt_dst.c_oflag |= (tt_src.c_oflag & OUTPUT_FLAGS);
tt_dst.c_cflag |= (tt_src.c_cflag & CONTROL_FLAGS);
tt_dst.c_lflag |= (tt_src.c_lflag & LOCAL_FLAGS);
SET(tt_dst.c_iflag, (tt_src.c_iflag & INPUT_FLAGS));
SET(tt_dst.c_oflag, (tt_src.c_oflag & OUTPUT_FLAGS));
SET(tt_dst.c_cflag, (tt_src.c_cflag & CONTROL_FLAGS));
SET(tt_dst.c_lflag, (tt_src.c_lflag & LOCAL_FLAGS));
/* Copy special chars from src verbatim. */
for (i = 0; i < NCCS; i++)