Re: [ast-users] Possible ksh93u / u+ bug

Neil Mahoney Wed, 14 Sep 2011 13:25:15 -0700

Hi Mike

Do you really want to use the string \"|\" as your field separator? Because you have escaped the dbl-quotes, they will be part of the pattern passed into awk for use as FS. Surely you mean "|" and "\\" (maybe you need 3 \ chars here to get 1 to emit).

If your data is really like fld1"|"fld2, it would be better to remove the " chars in a sed pre-processing step, or use gsub(/"/,"", $1) or similar depending on exactly what is in $1.

Other will have to comment on whether "|" is a valid value for FS in ast.

Cordially

Neil M

Evanston Illinois

will do ksh coding for hire or non-profit ;-)

--- On Wed, 9/14/11, Nemeth, Michael Kenneth (Mike) <[email protected]> wrote:

From: Nemeth, Michael Kenneth (Mike) <[email protected]>
Subject: [ast-users] Possible ksh93u / u+ bug
To: "[email protected]" <[email protected]>
Date: Wednesday, September 14, 2011, 2:05 PM

Hello,

We have compiled ksh 93 u and u+ for RHEL5.0 -> Red Hat Enterprise Linux Server release 5.7 (Tikanga)

When running a command line such as the below.

$ cat $KS_HOME/site_config|grep ^SITE_ID=|awk -F\"|\" '{print $1}'|awk -F\"=\" '{print $2}'

Somewhere in the pipe line ksh is core dumping.

Would you be so kind as to debug and diagnose? Please let us know if you need any more information.

Thanks you Mike

Here is the stack trace from one of the core files.

Core was generated by `/mnt/post_install/bin/wtk s/ksh93u.mc7.rhel5.debug -c /mn
t/post_install/bin/wtk'.
Program terminated with signal 6, Aborted.
#0 0x00002b1dc6a4d265 in raise () from /lib64/libc.so.6
(gdb) where
#0 0x00002b1dc6a4d265 in raise () from /lib64/libc.so.6
#1 0x00002b1dc6a4ed10 in abort () from /lib64/libc.so.6
#2 0x000000000051c95c in _vmbestcheck (vd=0x7bbe60, freeb=0x0)
    at /home/mc7/ksh/ksh93u/src/lib/libast/vmalloc/vmbest.c:225
#3 0x000000000051ec7c in bestfree (vm=0x7bbf40, data="">
    at /home/mc7/ksh/ksh93u/src/lib/libast/vmalloc/vmbest.c:860
#4 0x00000000005249ea in free (data="">
    at /home/mc7/ksh/ksh93u/src/lib/libast/vmalloc/malloc.c:354
#5 0x00002b1dc6a4f9fa in qsort () from /lib64/libc.so.6
#6 0x00002b1dc6a4a15a in read_alias_file () from /lib64/libc.so.6
#7 0x00002b1dc6a4a2be in _nl_expand_alias () from /lib64/libc.so.6
#8 0x00002b1dc6a48b3e in _nl_find_domain () from /lib64/libc.so.6
#9 0x00002b1dc6a4847f in __dcigettext () from /lib64/libc.so.6
#10 0x00002b1dc6a96b3c in strerror_r () from /lib64/libc.so.6
#11 0x00002b1dc6a9697e in strerror () from /lib64/libc.so.6
#12 0x00000000004de1ed in _ast_strerror (err=4)
    at /home/mc7/ksh/ksh93u/src/lib/libast/string/strerror.c:75
#13 0x00000000004ca0bf in fmterror (err=4)
    at /home/mc7/ksh/ksh93u/src/lib/libast/string/fmterror.c:36
#14 0x00000000004bcc3b in errorv (id=0x1583be70 "/mnt/post_install/bin/wtk",
    level=3, ap=0x7fffc5fa6ef0)
    at /home/mc7/ksh/ksh93u/src/lib/libast/misc/error.c:543
#15 0x00000000004bbc72 in error (level=259)
#16 0x00000000004de737 in nomalloc (region=0x7bbf40, type=3, obj=0x1582dec0,
    disc=0x7bbee0) at /home/mc7/ksh/ksh93u/src/lib/libast/disc/memfatal.c:56
#17 0x000000000051eb0f in bestaddr (vm=0x7bbf40, addr=0x1582dec0)
    at /home/mc7/ksh/ksh93u/src/lib/libast/vmalloc/vmbest.c:819
#18 0x000000000051ed9d in bestfree (vm=0x7bbf40, data="">
    at /home/mc7/ksh/ksh93u/src/lib/libast/vmalloc/vmbest.c:875
#19 0x00000000005249ea in free (data="">
    at /home/mc7/ksh/ksh93u/src/lib/libast/vmalloc/malloc.c:354
#20 0x000000000042ebed in slowexcept (iop=0x7bb2e0, type=11, data=""
    handle=0x1582dec0) at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/io.c:1768
#21 0x00000000005168a1 in sfraise (f=0x7bb2e0, type=11, data="">
    at /home/mc7/ksh/ksh93u/src/lib/libast/sfio/sfraise.c:90
#22 0x00000000004fc294 in sfclose (f=0x7bb2e0)
    at /home/mc7/ksh/ksh93u/src/lib/libast/sfio/sfclose.c:152
#23 0x000000000042b380 in sh_close (fd=0)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/io.c:683
#24 0x000000000042b17f in sh_iorenumber (shp=0x7bd680, f1=39, f2=0)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/io.c:638
#25 0x0000000000471453 in sh_exec (t=0x158354c0, flags=4)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/xec.c:1639
#26 0x0000000000472438 in sh_exec (t=0x158355e0, flags=5)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/xec.c:1927
#27 0x00000000004698a1 in sh_subshell (shp=0x7bd680, t=0x15835620, flags=5,
    comsub=1) at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/subshell.c:577
#28 0x0000000000444caf in comsubst (mp=0x1582d970, t=0x15835620, type=1)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/macro.c:2099
#29 0x000000000043e48c in copyto (mp=0x1582d970, endch=0, newquote=0)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/macro.c:594
#30 0x000000000043c774 in sh_mactrim (shp=0x7bd680,
    str=0x15835111 "VARIABLE=`cat $KS_HOME/site_config|grep ^SITE_ID=|awk -F\"|\" '{print $1}'|a
wk -F\"=\" '{print $2}'`", mode=-1)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/macro.c:178
#31 0x000000000044734e in nv_setlist (arg=0x15835100, flags=8832, typ=0x0)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/name.c:336
#32 0x000000000046f30e in sh_exec (t=0x158350c0, flags=4)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/xec.c:1075
#33 0x00000000004080ee in exfile (shp=0x7bd680, iop=0x1583e3d0, fno=18)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/main.c:601
#34 0x0000000000407540 in sh_main (ac=3, av=0x7fffc5fa95d8, userinit=0)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/main.c:373
#35 0x00000000004066a8 in main (argc=3, argv=0x7fffc5fa95d8)
    at /home/mc7/ksh/ksh93u/src/cmd/ksh93/sh/pmain.c:45
(gdb)

Michael Nemeth
Global Engineering Systems

+[email protected]

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Re: [ast-users] Possible ksh93u / u+ bug

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