I am playing around with custom buildins for ksh93. See the following source
file which compiles without error into a shared library libhello.so.
#include
int
b_hello(int argc, char *argv[], void *extra)
{
if (argc != 2) {
printf("Usage: hello arg\n");
return(2);
}
printf("Hello %s\n",argv[1]);
return(0);
}
int
b_hello1(int argc, char *argv[], void *extra)
{
if (argc != 2) {
printf("Usage: hello1 arg\n");
return(2);
}
printf("Hello1 %s\n",argv[1]);
return(0);
}
void
lib_init(int c)
{
printf("LIBHELLO initialized\n");
sh_addbuiltin("hello1", b_hello1, 0);
}
I load the builtins in libhello.so as follows
$ builtin -f ./libhello.so hello
Things works as expected if I do not call sh_addbuiltin() in lib_init() or
elsewhere. However if I call sh_addbuiltin() my terminal session
disappears (killed?) without any core dump.
My questions are as follows. In lib_init() can you call sh_addbuiltin()
to load a builtin such as hello1? The KSK-93 FAQ seems to indicate
that this should work (Q4 - SHELL EXTENSIONS) What am I doing
wrong which is causing sh_addbuiltin() to fail? Incorrect headers?
Do I need to include some library I am unaware of?
- FPMurphy
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