Wendy Lin wrote:
>
> Are there any examples which show how I can use libshell to access all
> members of an indexed or associative array? For example I'd like to
> create a shell via sh_init, use sh_trap to run shell code and then use
> C code to get the index names of all elements in array 'mylist', i.e.
> a C version of "${!myli...@]}"
> Does anyone have a related code example?
Please try the code below - it should work for both indexed and
associative arrays:
-- snip --
#include <shell.h>
#include <nval.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
Namval_t *np;
Namval_t *np_sub;
Sfdouble_t d;
Shell_t *shp = sh_init(argc, argv, 0);
//sh_trap("typeset -a x=(1 2)",0);
sh_trap("typeset -A x=([a]=1 [b]=2)",0);
np = nv_open("x", shp->var_tree, 0);
printf("nv_isarray(np)=%d\n", nv_isarray(np));
nv_putsub(np, NULL, ARRAY_SCAN);
np_sub = np;
do
{
printf("%lx: sub='%s'\n", (long)np_sub, nv_getsub(np_sub));
} while (np_sub && nv_nextsub(np_sub));
nv_close(np);
return(0);
}
-- snip --
----
Bye,
Roland
--
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