Plugins appear to have stopped working in the latest release of ksh93- at least
on 64-bit Linux.
Here is a very simple crude "HelloWorld" example of a plugin:
#include <stdio.h>
intb_hello(int argc, char *argv[], void *extra){ if (argc != 2) {
fprintf(stderr,"Usage: hello arg\n"); return(2); }
printf("Hello %s\n", argv[1]); return(0);}
which is built as follows:
gcc -fPIC -g -c hello.c gcc -shared -W1,-soname,libhello.so -o libhello.so
hello.o
Works fine on ksh83 Version JM 93t+ 2010-03-05 and earlier
$ ./ksh$ echo ${.sh.version}Version JM 93t+ 2010-03-05$ builtin -f
./libhello.so hello$ hello worldHello there world$
but core dumps on later versions of ksh93
$ /bin/ksh$ echo ${.sh.version}Version JM 93t+ 2010-06-21$ builtin -f
./libhello.so helloMemory fault(coredump)
Program terminated with signal 11, Segmentation fault.#0 dllplugin (lib=0x0,
name=0x177c531 "./libhello.so", ver=<value optimized out>, rel=20100528,
flags=1, path=0x0, size=0) at
/usr/src/debug/ksh-20100621/src/lib/libdll/dllplug.c:8282 if
(!dllcheck(dll, dle->path, rel))
Extensive work was recently done in libdll. New source codefiles include
dlllib.h, dllcheck.c, dllerror.c, dllplug.c.
Is there now a requirement to have a version number on a plugin? Do plugins
need to be build differently?
- Finnbarr _______________________________________________
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