On further examination I found this: in my log: "define: backwards memcpy"
>From reading the mailing lists on this, it looks like OpenBSD detects
overlapping memcpy regions, considers it a bug, and segfaults the
offending program to prevent unpredictable behavior.
Here's a discussion explaining the motivation behind this that I found
in the archives:
https://marc.info/?l=openbsd-misc&m=148762033002663&w=2
On Wed, Apr 5, 2017 at 11:49 AM, fff iii <fr3akyidiot_at_gmail.com> wrote:
> On Wed, Apr 5, 2017 at 4:08 AM, Laurent Bercot <ska-skaware_at_skarnet.org> wrote:
>>> define TESTING \#testing
>>> define TESTING2 /test1/test2/test3/test4/\\${TESTING}/test6
>>
>>
>> Works for me.
>>
>> Please make sure you're running the latest version of execline, built
>> against the latest version of skalibs. (execline-2.3.0.0 won't work
>> with a version of skalibs older than 2.5.0.0.)
>>
>> If it's still not working for you after rebuilding, please give your
>> machine sysdeps (/usr/lib/skalibs/sysdeps/sysdeps).
>>
>> --
>> Laurent
>
>
> Hi Laurent,
>
>
> Note there are two '\\' before ${TESTING}
> and TESTING is defined as TESTING="#testing" would be in a regular
> shell, I had to use a backslash to escape #
>
> Hope the following helps:
>
> If I use just one backslash, it works. If I use two - segfaults. If I
> use three backslashes, it also segfaults. If I use four or five
> backslashes it works. Segfaults with six backslashes.
>
> Yes, these are the latest skalibs and execline from the git on a
> recent OpenBSD-current snapshot:
>
> Here are the sysdeps:
>
> target: amd64-unknown-openbsd6.1
> clockrt: yes
> clockmon: yes
> posixspawn: yes
> timer: no
> endianness: little
> sizeofushort: 2
> sizeofuint: 4
> sizeofulong: 8
> sizeofsize: 8
> signedsize: no
> sizeofuid: 4
> signeduid: no
> sizeofgid: 4
> signedgid: no
> sizeofpid: 4
> signedpid: yes
> sizeoftime: 8
> signedtime: yes
> sizeofdev: 4
> signeddev: yes
> sizeofino: 8
> signedino: no
> accept4: yes
> ancilautoclose: no
> cmsgcloexec: yes
> devurandom: yes
> eproto: no
> eventfd: no
> flock: yes
> getpeereid: yes
> sopeercred: no
> getpeerucred: no
> ipv6: yes
> malloc0: yes
> msgdontwait: yes
> nbwaitall: no
> openat: yes
> linkat: yes
> pipe2: yes
> ppoll: yes
> revoke: yes
> sendfile: no
> setgroups: yes
> settimeofday: yes
> signalfd: no
> splice: no
> strcasestr: yes
> strnlen: yes
> uint64t: yes
> futimens: yes
> futimes: yes
> arc4random: yes
> arc4random_addrandom: no
> getrandom: no
> itimer: yes
>
> Thank you.
Received on Wed Apr 05 2017 - 17:35:16 UTC