From 4a01cf4327621ff989dc8aacce246b7f758e5572 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Apr 14 2016 03:45:16 +0000
Subject: library: helper functions: added slbt_archive_import().


---

diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index c1f9ede..265ba49 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -201,8 +201,11 @@ slbt_api int  slbt_exec_compile		(const struct slbt_driver_ctx *, struct slbt_ex
 slbt_api int  slbt_exec_install		(const struct slbt_driver_ctx *, struct slbt_exec_ctx *);
 slbt_api int  slbt_exec_link		(const struct slbt_driver_ctx *, struct slbt_exec_ctx *);
 
+/* helper api */
 slbt_api int  slbt_map_input		(int fd, const char * path, int prot, struct slbt_input *);
 slbt_api int  slbt_unmap_input		(struct slbt_input *);
+slbt_api int  slbt_archive_import	(const struct slbt_driver_ctx *, struct slbt_exec_ctx *,
+					 char * dstarchive, char * srcarchive);
 
 /* utility api */
 slbt_api int  slbt_output_config	(const struct slbt_driver_ctx *);
diff --git a/project/common.mk b/project/common.mk
index 719b6a2..ae06f28 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -2,6 +2,7 @@ COMMON_SRCS = \
 	src/internal/slibtool_symlink_impl.c \
 	src/driver/slbt_driver_ctx.c \
 	src/driver/slbt_unit_ctx.c \
+	src/helper/slbt_archive_import.c \
 	src/logic/slbt_exec_compile.c \
 	src/logic/slbt_exec_ctx.c \
 	src/logic/slbt_exec_install.c \
diff --git a/project/tree.mk b/project/tree.mk
index d91f6a2..42564b8 100644
--- a/project/tree.mk
+++ b/project/tree.mk
@@ -1,6 +1,7 @@
 tree.tag:
 		mkdir -p src
 		mkdir -p src/driver
+		mkdir -p src/helper
 		mkdir -p src/internal
 		mkdir -p src/logic
 		mkdir -p src/output
diff --git a/src/helper/slbt_archive_import.c b/src/helper/slbt_archive_import.c
new file mode 100644
index 0000000..7bd50cc
--- /dev/null
+++ b/src/helper/slbt_archive_import.c
@@ -0,0 +1,95 @@
+/*******************************************************************/
+/*  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;
+}