*Synopsis*: "echo ${test}" with test undefined crashes the shell
CR 6848486 changed on Oct 23 2009 by <User 1-7MTUEB>
=== Field ============ === New Value ============= === Old Value =============
Commit to Fix in Build snv_127
See Also 6437624
Status 7-Fix in Progress 6-Fix Understood
====================== =========================== ===========================
*Change Request ID*: 6848486
*Synopsis*: "echo ${test}" with test undefined crashes the shell
Product: solaris
Category: shell
Subcategory: korn93
Type: Defect
Subtype: Functionality
Status: 7-Fix in Progress
Substatus:
Priority: 2-High
Introduced In Release: solaris_nevada
Introduced In Build: snv_72
Responsible Engineer: <User 1-7MTUEB>
Keywords: oss-request, oss-sponsor
=== *Description* ============================================================
This is an odd one:
$ ksh93 --version
version sh (AT&T Research) 93t 2008-11-04
$ ksh93
<email address omitted>:~$ echo $test
<email address omitted>:~$ echo ${test}
Segmentation Fault (core dumped)
This doesn't crash on ksh88 BTW.
*** (#1 of 1): 2009-06-05 16:08:16 GMT+00:00 <User 1-5Q-10765>
=== *Public Comments* ========================================================
It seems a bit worse even:
<email address omitted>:~$ echo ${sleep}
Usage: sleep [ options ] seconds
So, builtin commands are evaluated.
*** (#1 of 2): 2009-06-05 16:46:25 GMT+00:00 <User 1-1SURPB>
The core dump problem is reproducible even on the lastest ksh93 code drop from
upstream:
# echo ${test}
Segmentation Fault - core dumped
# mdb core
Loading modules: [ libc.so.1 ld.so.1 ]
> $c
libshell.so.1`b_test+0x6b()
libshell.so.1`sh_exec+0x302f()
libshell.so.1`sh_subshell+0x65c()
libshell.so.1`comsubst+0x8a2()
libshell.so.1`sh_macfun+0xc3()
libshell.so.1`varsub+0xe00()
libshell.so.1`copyto+0xb4a()
libshell.so.1`sh_macexpand+0x1f1()
libshell.so.1`arg_expand+0xa5()
libshell.so.1`sh_argbuild+0x9a()
libshell.so.1`sh_exec+0x213f()
libshell.so.1`exfile+0x786()
libshell.so.1`sh_main+0x7fe()
main+0x52()
0x400ccc()
But "sleep" problem is not there:
# echo ${sleep}
#
*** (#2 of 2): 2009-06-08 12:19:00 GMT+00:00 <User 1-1SURPB>
=== *Workaround* =============================================================
=== *Additional Details* =====================================================
Targeted Release: solaris_nevada
Commit To Fix In Build: snv_127
Fixed In Build:
Integrated In Build:
Verified In Build:
See Also: 6437624, 6793763, 6857344
Duplicate of:
Hooks:
Hook1:
Hook2:
Hook3:
Hook4:
Hook5: <email address omitted>
Hook6: <email address omitted>
Program Management:
Root Cause: Inadequate Algorithm
Fix Affects Documentation: No
Fix Affects Localization: No
=== *History* ================================================================
Date Submitted: 2009-06-05 16:08:15 GMT+00:00
Submitted By: <User 1-5Q-10765>
Status Changed Date Updated Updated By
3-Accepted 2009-06-05 16:51:03 GMT+00:00 <User 1-1SURPB>
6-Fix Understood 2009-06-16 15:37:43 GMT+00:00 <User 1-1SURPB>
7-Fix in Progress 2009-10-23 18:37:53 GMT+00:00 <User 1-7MTUEB>
=== *Service Request* ========================================================
Impact: Critical
Functionality: Nonessential
Severity: 3
Product Name: solaris
Product Release: solaris_nevada
Product Build:
Operating System: generic
Hardware: generic
Submitted Date: 2009-06-05 16:08:16 GMT+00:00
=== *Multiple Release (MR) Cluster* - 0 ======================================
