/*******************************************************************/

/*  slibtool: a skinny libtool implementation, written in C        */

/*  Copyright (C) 2016  Z. Gilboa                                  */

/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */

/*******************************************************************/

#include <stdlib.h>

#include <limits.h>

#include <unistd.h>

#include <stdbool.h>

#include <sys/wait.h>

#include <slibtool/slibtool.h>

#include "slibtool_spawn_impl.h"

static int slbt_archive_import_child(

	char *	program,

	int	fd[2])

{

	char *	argv[3];

	argv[0] = program;

	argv[1] = "-M";

	argv[2] = 0;

	close(fd[1]);

	close(0);

	if (dup(fd[0]) == 0)

		execvp(program,argv);

	exit(EXIT_FAILURE);

	return -1;

}

inline int slbt_archive_import(

	const struct slbt_driver_ctx *	dctx,

	struct slbt_exec_ctx *		ectx,

	char *				dstarchive,

	char *				srcarchive)

{

	pid_t	pid;

	int	ret;

	int	code;

	int	fd[2];

	FILE *	fout;

	char	program[PATH_MAX];

	if ((size_t)snprintf(program,sizeof(program),"%s",

			dctx->cctx->host.ar) >= sizeof(program))

		return -1;

	if (pipe(fd))

		return -1;

	if ((pid = fork()) < 0) {

		close(fd[0]);

		close(fd[1]);

		return -1;

	}

	if (pid == 0)

		return slbt_archive_import_child(

			program,

			fd);

	ectx->pid = pid;

	if ((fout = fdopen(fd[1],"a"))) {

		ret = (fprintf(

				fout,

				"OPEN %s\n"

				"ADDLIB %s\n"

				"SAVE\n"

				"END\n",

				dstarchive,

				srcarchive) < 0)

			? -1 : 0;

		fclose(fout);

		close(fd[0]);

	} else {

		ret = -1;

		close(fd[0]);

		close(fd[1]);

	}

	code = waitpid(

		pid,

		&ectx->exitcode,

		0);

	return ret || (code != pid) || ectx->exitcode

		? -1 : 0;

}