1 files changed, 63 insertions, 7 deletions

diff --git a/src/driver/amgc_driver_ctx.c b/src/driver/amgc_driver_ctx.c
index e22d566..7546168 100644
--- a/src/driver/amgc_driver_ctx.c
+++ b/src/driver/amgc_driver_ctx.c
@@ -59,6 +59,7 @@ static uint32_t amgc_argv_flags(uint32_t flags)
 }
 
 static int amgc_driver_usage(
+	int				fdout,
 	const char *			program,
 	const char *			arg,
 	const struct argv_option **	optv,
@@ -70,7 +71,7 @@ static int amgc_driver_usage(
 		"Usage: %s [options] <file>...\n" "Options:\n",
 		program);
 
-	argv_usage(STDOUT_FILENO,header,optv,arg);
+	argv_usage(fdout,header,optv,arg);
 	argv_free(meta);
 
 	return AMGC_USAGE;
@@ -78,6 +79,7 @@ static int amgc_driver_usage(
 
 static struct amgc_driver_ctx_impl * amgc_driver_ctx_alloc(
 	struct argv_meta *		meta,
+	const struct amgc_fd_ctx *	fdctx,
 	const struct amgc_common_ctx *	cctx,
 	size_t				nunits,
 	size_t				nactions)
@@ -100,8 +102,8 @@ static struct amgc_driver_ctx_impl * amgc_driver_ctx_alloc(
 		return 0;
 	}
 
-	if (cctx)
-		memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));
+	memcpy(&ictx->ctx.fdctx,fdctx,sizeof(*fdctx));
+	memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));
 
 	for (entry=meta->entries,aunits=ictx->units; entry->fopt || entry->arg; entry++)
 		if (!entry->fopt)
@@ -147,6 +149,7 @@ int amgc_get_driver_ctx(
 	char **				argv,
 	char **				envp,
 	uint32_t			flags,
+	const struct amgc_fd_ctx *	fdctx,
 	struct amgc_driver_ctx **	pctx)
 {
 	struct amgc_driver_ctx_impl *	ctx;
@@ -160,12 +163,23 @@ int amgc_get_driver_ctx(
 
 	(void)envp;
 
+	if (!fdctx) {
+		fdctx = &(const struct amgc_fd_ctx) {
+			.fdin  = STDIN_FILENO,
+			.fdout = STDOUT_FILENO,
+			.fderr = STDERR_FILENO,
+			.fdlog = (-1),
+			.fdcwd = AT_FDCWD,
+			.fddst = AT_FDCWD,
+		};
+	}
+
 	argv_optv_init(amgc_default_options,optv);
 
 	if (!(meta = argv_get(
 			argv,optv,
 			amgc_argv_flags(flags),
-			STDERR_FILENO)))
+			fdctx->fderr)))
 		return -1;
 
 	nunits	= 0;
@@ -175,7 +189,10 @@ int amgc_get_driver_ctx(
 	cctx.drvflags = flags;
 
 	if (!argv[1] && (flags & AMGC_DRIVER_VERBOSITY_USAGE))
-		return amgc_driver_usage(program,0,optv,meta);
+		return amgc_driver_usage(
+			fdctx->fderr,
+			program,0,
+			optv,meta);
 
 	/* compiler defaults */
 	cctx.std = STANDARD_C99;
@@ -186,7 +203,10 @@ int amgc_get_driver_ctx(
 			switch (entry->tag) {
 				case TAG_HELP:
 					if (flags & AMGC_DRIVER_VERBOSITY_USAGE)
-						return amgc_driver_usage(program,entry->arg,optv,meta);
+						return amgc_driver_usage(
+							fdctx->fderr,
+							program,entry->arg,
+							optv,meta);
 
 				case TAG_VERSION:
 					cctx.drvflags |= AMGC_DRIVER_VERSION;
@@ -207,7 +227,7 @@ int amgc_get_driver_ctx(
 	if (amgc_init_cparser())
 		return amgc_get_driver_ctx_fail(meta);
 
-	if (!(ctx = amgc_driver_ctx_alloc(meta,&cctx,nunits,nactions)))
+	if (!(ctx = amgc_driver_ctx_alloc(meta,fdctx,&cctx,nunits,nactions)))
 		return amgc_get_driver_ctx_fail(meta);
 
 	/* create action vector */
@@ -289,3 +309,39 @@ const struct amgc_source_version * amgc_source_version(void)
 {
 	return &amgc_src_version;
 }
+
+int amgc_get_driver_fdctx(
+	const struct amgc_driver_ctx *	dctx,
+	struct amgc_fd_ctx *		fdctx)
+{
+	struct amgc_driver_ctx_impl *	ictx;
+
+	ictx = amgc_get_driver_ictx(dctx);
+
+	fdctx->fdin  = ictx->fdctx.fdin;
+	fdctx->fdout = ictx->fdctx.fdout;
+	fdctx->fderr = ictx->fdctx.fderr;
+	fdctx->fdlog = ictx->fdctx.fdlog;
+	fdctx->fdcwd = ictx->fdctx.fdcwd;
+	fdctx->fddst = ictx->fdctx.fddst;
+
+	return 0;
+}
+
+int amgc_set_driver_fdctx(
+	struct amgc_driver_ctx *	dctx,
+	const struct amgc_fd_ctx *	fdctx)
+{
+	struct amgc_driver_ctx_impl *	ictx;
+
+	ictx = amgc_get_driver_ictx(dctx);
+
+	ictx->fdctx.fdin  = fdctx->fdin;
+	ictx->fdctx.fdout = fdctx->fdout;
+	ictx->fdctx.fderr = fdctx->fderr;
+	ictx->fdctx.fdlog = fdctx->fdlog;
+	ictx->fdctx.fdcwd = fdctx->fdcwd;
+	ictx->fdctx.fddst = fdctx->fddst;
+
+	return 0;
+}