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authorDenys Vlasenko2016-10-26 15:56:53 +0200
committerDenys Vlasenko2016-10-26 15:56:53 +0200
commitf15aa57a7f5edcbf3098873b8798c0ea7f496ed7 (patch)
tree5641162328f080297bd9a27cf50730dbb3a8f604 /shell/ash_test/ash-vars
parente19923f6652a638ac39c84012e97f52cf5a7568e (diff)
downloadbusybox-f15aa57a7f5edcbf3098873b8798c0ea7f496ed7.zip
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ash: [PARSER] Fix parsing of ${##1}
Upstream commit: Date: Thu, 4 Oct 2007 22:15:10 +0800 [PARSER] Fix parsing of ${##1} Previously dash treated ${##1} as a length operation. This patch fixes that. Test case: set -- a echo ${##1}OK Old result: 1OK New result: OK This was a real bug in ash (but not in hush). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/ash_test/ash-vars')
-rw-r--r--shell/ash_test/ash-vars/param_expand_len.right3
-rwxr-xr-xshell/ash_test/ash-vars/param_expand_len.tests7
2 files changed, 10 insertions, 0 deletions
diff --git a/shell/ash_test/ash-vars/param_expand_len.right b/shell/ash_test/ash-vars/param_expand_len.right
index 96e8cb5..48d01d2 100644
--- a/shell/ash_test/ash-vars/param_expand_len.right
+++ b/shell/ash_test/ash-vars/param_expand_len.right
@@ -7,3 +7,6 @@ Make sure len parsing doesnt break arg count
Testing len op
4 3 2 1 0 0
0 3 0
+Nothing:
+Nothing:
+One:1
diff --git a/shell/ash_test/ash-vars/param_expand_len.tests b/shell/ash_test/ash-vars/param_expand_len.tests
index fe20a45..369c8d4 100755
--- a/shell/ash_test/ash-vars/param_expand_len.tests
+++ b/shell/ash_test/ash-vars/param_expand_len.tests
@@ -15,3 +15,10 @@ unset e
f=abc
g=
echo ${#e} ${#f} ${#g}
+
+set -- a
+# This must be interpreted as: $# ("1"), then remove trailing "1".
+# IOW: empty result.
+echo Nothing:${##1}
+echo Nothing:${#%1}
+echo One:${##x}