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hush: fix bkslash+newline handling and number validation in ${NN} and ${#NN}

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Entering "${1a}" into interactive shell was making it exit.

function                                             old     new   delta
parse_dollar                                         824     958    +134
i_getch_and_eat_bkslash_nl                             -      44     +44
parse_expr                                           917     938     +21
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(add/remove: 1/0 grow/shrink: 2/0 up/down: 199/0)             Total: 199 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2021-06-19 15:28:10 +02:00
parent fd217c1cbf
commit 97c3b5e3ff
6 changed files with 64 additions and 2 deletions
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4
shell/ash_test/ash-parsing/bkslash_newline4.right Normal file
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@ -0,0 +1,4 @@
1:1
22:22
3:3
Ok:0

14
shell/ash_test/ash-parsing/bkslash_newline4.tests Executable file
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@ -0,0 +1,14 @@
set -- 1 22 333
echo 1:$\
1
echo 22:$\
{\
2\
}
echo 3:$\
{\
#\
3\
}
echo Ok:$\
?