* bash: '\n' after command substitution in $PS1 causes errors when igncr is set
@ 2024-05-23 4:16 Ken Takata
0 siblings, 0 replies; only message in thread
From: Ken Takata @ 2024-05-23 4:16 UTC (permalink / raw)
To: cygwin
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Hello all,
I originally reported this issue to the msys2 team:
https://github.com/msys2/MSYS2-packages/issues/1839
https://github.com/msys2/MSYS2-packages/pull/4477
But I find that this issue is coming from Cygwin Bash, so I'm reporting
here.
When I use \n after command substitution in $PS1, it causes syntax errors
when the igncr option is set:
```
$ set -o igncr
$ PS1='$(date)\n\$ '
-bash: command substitution: line 1: syntax error near unexpected token `)'
-bash: command substitution: line 1: `date)'
```
(Confirmed with bash-5.2.21-1)
I found an issue in rewind_input_string() in parse.y. It didn't take care
of '\r'.
Please find the attached patch to fix it.
Could you consider merging this into bash-5.2-cygwin.patch?
Regards,
Ken Takata
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--- a/parse.y
+++ b/parse.y
@@ -1684,7 +1684,16 @@
into account, e.g., $(...\n) */
xchars = shell_input_line_len - shell_input_line_index;
if (bash_input.location.string[-1] == '\n')
- xchars++;
+ {
+ xchars++;
+#ifdef __CYGWIN__
+ {
+ extern int igncr;
+ if (igncr && bash_input.location.string[-2] == '\r')
+ xchars++;
+ }
+#endif
+ }
/* XXX - how to reflect bash_input.location.string back to string passed to
parse_and_execute or xparse_dolparen? xparse_dolparen needs to know how
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