/* gbatch_gethenv.c -- API function to get host environment

   Copyright 2009 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include <sys/types.h>
#include "gbatch.h"
#include "xbapi_int.h"
#include "incl_net.h"
#include "incl_unix.h"

extern int  gbatch_read(const int, char *, unsigned);
extern int  gbatch_rmsg(const struct api_fd *, struct api_msg *);
extern int  gbatch_wmsg(const struct api_fd *, struct api_msg *);
extern struct api_fd *gbatch_look_fd(const int);

char **gbatch_gethenv(const int fd)
{
	int	ret;
	unsigned	nitems, cnt;
	struct	api_fd	*fdp = gbatch_look_fd(fd);
	struct	api_msg		msg;
	char	**result;

	if  (!fdp)  {
		gbatch_dataerror = XB_INVALID_FD;
		return  (char **) 0;
	}

	msg.code = API_SENDENV;
	if  ((ret = gbatch_wmsg(fdp, &msg))  ||  (ret = gbatch_rmsg(fdp, &msg)))  {
		gbatch_dataerror = ret;
		return  (char **) 0;
	}
	if  (msg.retcode != 0)  {
		gbatch_dataerror = (SHORT) ntohs(msg.retcode);
		return  (char **) 0;
	}
	nitems = ntohl(msg.un.r_lister.nitems);
	if  (!(result = (char **) malloc((unsigned)(sizeof(char *) * (nitems + 1)))))  {
		gbatch_dataerror = XB_NOMEM;
		return  (char **) 0;
	}

	/* Maximum length is in seq if we want it.  */

	for  (cnt = 0;  cnt < nitems;  cnt++)  {
		ULONG	le;
		unsigned  lng;
		char	*rp;
		if  ((ret = gbatch_read(fdp->sockfd, (char *) &le, sizeof(le))) != 0)  {
		dataerr:
			gbatch_dataerror = ret;
		errrest:
			while  (cnt != 0)
				free(result[--cnt]);
			free((char *) result);
			return  (char **) 0;
		}
		lng = ntohl(le);
		if  (!(rp = malloc(lng+1)))  {
			gbatch_dataerror = XB_NOMEM;
			goto  errrest;
		}
		if  ((ret = gbatch_read(fdp->sockfd, rp, lng+1)) != 0)  {
			free(rp);
			goto  dataerr;
		}
		result[cnt] = rp;
	}
	result[nitems+1] = (char *) 0;
	return  result;
}
