From e956c85f08020ed4048ff1d9fe16750f2d08ad87 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sat, 30 Apr 2016 15:34:39 -0400
Subject: execute mode: initial implementation.

---
 include/slibtool/slibtool.h   |  1 +
 project/common.mk             |  1 +
 src/logic/slbt_exec_execute.c | 82 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 src/logic/slbt_exec_execute.c

diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index f03155a..e02e6dc 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -239,6 +239,7 @@ slbt_api void slbt_reset_placeholders	(struct slbt_exec_ctx *);
 slbt_api void slbt_disable_placeholders	(struct slbt_exec_ctx *);
 
 slbt_api int  slbt_exec_compile		(const struct slbt_driver_ctx *, struct slbt_exec_ctx *);
+slbt_api int  slbt_exec_execute		(const struct slbt_driver_ctx *, struct slbt_exec_ctx *);
 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 *);
 
diff --git a/project/common.mk b/project/common.mk
index 4bcbc5f..f55726a 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -7,6 +7,7 @@ COMMON_SRCS = \
 	src/helper/slbt_dump_machine.c \
 	src/logic/slbt_exec_compile.c \
 	src/logic/slbt_exec_ctx.c \
+	src/logic/slbt_exec_execute.c \
 	src/logic/slbt_exec_install.c \
 	src/logic/slbt_exec_link.c \
 	src/logic/slbt_map_input.c \
diff --git a/src/logic/slbt_exec_execute.c b/src/logic/slbt_exec_execute.c
new file mode 100644
index 0000000..04fec87
--- /dev/null
+++ b/src/logic/slbt_exec_execute.c
@@ -0,0 +1,82 @@
+/*******************************************************************/
+/*  slibtool: a skinny libtool implementation, written in C        */
+/*  Copyright (C) 2016  Z. Gilboa                                  */
+/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <string.h>
+#include <stdbool.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <slibtool/slibtool.h>
+#include "slibtool_spawn_impl.h"
+
+int  slbt_exec_execute(
+	const struct slbt_driver_ctx *	dctx,
+	struct slbt_exec_ctx *		ectx)
+{
+	int			ret;
+	char **			parg;
+	char *			program;
+	char *			script;
+	char *			base;
+	char *			mark;
+	char			exeref [PATH_MAX];
+	char			wrapper[PATH_MAX];
+	struct slbt_exec_ctx *	actx = 0;
+
+	/* context */
+	if (ectx)
+		slbt_disable_placeholders(ectx);
+	else if ((ret = slbt_get_exec_ctx(dctx,&ectx)))
+		return ret;
+	else {
+		actx = ectx;
+		slbt_disable_placeholders(ectx);
+	}
+
+	/* script, program */
+	program = ectx->cargv[0];
+	script  = ectx->cargv[1];
+
+	/* wrapper */
+	if ((size_t)snprintf(wrapper,sizeof(wrapper),"%s.exe.wrapper",
+				script)
+			>= sizeof(wrapper)) {
+		slbt_free_exec_ctx(actx);
+		return -1;
+	}
+
+	/* exeref */
+	if ((base = strrchr(script,'/')))
+		base++;
+	else
+		base = script;
+
+	strcpy(exeref,script);
+	mark = exeref + (base - script);
+	sprintf(mark,".libs/%s",base);
+
+	/* swap vector */
+	ectx->cargv[0] = wrapper;
+	ectx->cargv[1] = program;
+	ectx->cargv[2] = exeref;
+
+	/* execute mode */
+	ectx->program = script;
+	ectx->argv    = ectx->cargv;
+
+	/* step output */
+	if (!(dctx->cctx->drvflags & SLBT_DRIVER_SILENT))
+		if (slbt_output_execute(dctx,ectx)) {
+			slbt_free_exec_ctx(actx);
+			return -1;
+		}
+
+	execvp(wrapper,ectx->argv);
+
+	slbt_free_exec_ctx(actx);
+	return -1;
+}
-- 
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