driver, library interfaces: support alternate fd's for input/output/error/log.

4 files changed, 120 insertions, 14 deletions

diff --git a/src/driver/sfrt_amain.c b/src/driver/sfrt_amain.c
index 0b18010..c37f77d 100644
--- a/src/driver/sfrt_amain.c
+++ b/src/driver/sfrt_amain.c
@@ -2,6 +2,7 @@
 #include <unistd.h>
 #include <sofort/sofort.h>
 #include "sofort_driver_impl.h"
+#include "sofort_dprintf_impl.h"
 
 #ifndef SFRT_DRIVER_FLAGS
 #define SFRT_DRIVER_FLAGS	SFRT_DRIVER_VERBOSITY_ERRORS \
@@ -24,15 +25,16 @@ static const char * const sfrt_ver_plain[6] = {
 		"",""
 };
 
-static ssize_t sfrt_version(struct sfrt_driver_ctx * dctx)
+static ssize_t sfrt_version(int fdout, struct sfrt_driver_ctx * dctx)
 {
 	const struct sfrt_source_version * verinfo;
 	const char * const * verclr;
 
 	verinfo = sfrt_source_version();
-	verclr  = isatty(STDOUT_FILENO) ? sfrt_ver_color : sfrt_ver_plain;
+	verclr  = isatty(fdout) ? sfrt_ver_color : sfrt_ver_plain;
 
-	return fprintf(stdout,vermsg,
+	return sfrt_dprintf(
+			fdout,vermsg,
 			verclr[0],dctx->program,verclr[1],
 			verclr[2],verinfo->major,verinfo->minor,
 			verinfo->revision,verclr[3],
@@ -59,20 +61,25 @@ static int sfrt_exit(struct sfrt_driver_ctx * dctx, int ret)
 	return ret;
 }
 
-int sfrt_main(int argc, char ** argv, char ** envp)
+int sfrt_main(int argc, char ** argv, char ** envp, const struct sfrt_fd_ctx * fdctx)
 {
 	int				ret;
+	int				fdout;
+	uint64_t			flags;
 	struct sfrt_driver_ctx *	dctx;
 	struct sfrt_unit_ctx *		uctx;
 	const char **			unit;
 
-	if ((ret = sfrt_get_driver_ctx(argv,envp,SFRT_DRIVER_FLAGS,&dctx)))
+	flags = SFRT_DRIVER_FLAGS;
+	fdout = fdctx ? fdctx->fdout : STDOUT_FILENO;
+
+	if ((ret = sfrt_get_driver_ctx(argv,envp,flags,fdctx,&dctx)))
 		return (ret == SFRT_USAGE)
 			? !--argc
 			: SFRT_ERROR;
 
 	if (dctx->cctx->drvflags & SFRT_DRIVER_VERSION)
-		if ((sfrt_version(dctx)) < 0)
+		if ((sfrt_version(fdout,dctx)) < 0)
 			return sfrt_exit(dctx,SFRT_ERROR);
 
 	if (dctx->cctx->anystring)				/* dummy */
diff --git a/src/driver/sfrt_driver_ctx.c b/src/driver/sfrt_driver_ctx.c
index fc3ea3a..44cfe82 100644
--- a/src/driver/sfrt_driver_ctx.c
+++ b/src/driver/sfrt_driver_ctx.c
@@ -41,6 +41,7 @@ static uint32_t sfrt_argv_flags(uint32_t flags)
 }
 
 static int sfrt_driver_usage(
+	int				fdout,
 	const char *			program,
 	const char *			arg,
 	const struct argv_option **	optv,
@@ -52,7 +53,7 @@ static int sfrt_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 SFRT_USAGE;
@@ -60,6 +61,7 @@ static int sfrt_driver_usage(
 
 static struct sfrt_driver_ctx_impl * sfrt_driver_ctx_alloc(
 	struct argv_meta *		meta,
+	const struct sfrt_fd_ctx *	fdctx,
 	const struct sfrt_common_ctx *	cctx,
 	size_t				nunits)
 {
@@ -75,8 +77,8 @@ static struct sfrt_driver_ctx_impl * sfrt_driver_ctx_alloc(
 	if (!(ictx = calloc(1,size)))
 		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,units=ictx->units; entry->fopt || entry->arg; entry++)
 		if (!entry->fopt)
@@ -103,6 +105,7 @@ int sfrt_get_driver_ctx(
 	char **				argv,
 	char **				envp,
 	uint32_t			flags,
+	const struct sfrt_fd_ctx *	fdctx,
 	struct sfrt_driver_ctx **	pctx)
 {
 	struct sfrt_driver_ctx_impl *	ctx;
@@ -115,12 +118,23 @@ int sfrt_get_driver_ctx(
 
 	(void)envp;
 
+	if (!fdctx) {
+		fdctx = &(const struct sfrt_fd_ctx) {
+			.fdin  = STDIN_FILENO,
+			.fdout = STDOUT_FILENO,
+			.fderr = STDERR_FILENO,
+			.fdlog = (-1),
+			.fdcwd = AT_FDCWD,
+			.fddst = AT_FDCWD,
+		};
+	}
+
 	argv_optv_init(sfrt_default_options,optv);
 
 	if (!(meta = argv_get(
 			argv,optv,
 			sfrt_argv_flags(flags),
-			STDERR_FILENO)))
+			fdctx->fderr)))
 		return -1;
 
 	nunits	= 0;
@@ -129,7 +143,10 @@ int sfrt_get_driver_ctx(
 	cctx.drvflags = flags;
 
 	if (!argv[1] && (flags & SFRT_DRIVER_VERBOSITY_USAGE))
-		return sfrt_driver_usage(program,0,optv,meta);
+		return sfrt_driver_usage(
+			fdctx->fderr,
+			program,0,
+			optv,meta);
 
 	/* get options, count units */
 	for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
@@ -137,7 +154,10 @@ int sfrt_get_driver_ctx(
 			switch (entry->tag) {
 				case TAG_HELP:
 					if (flags & SFRT_DRIVER_VERBOSITY_USAGE)
-						return sfrt_driver_usage(program,entry->arg,optv,meta);
+						return sfrt_driver_usage(
+							fdctx->fderr,
+							program,entry->arg,
+							optv,meta);
 
 				case TAG_VERSION:
 					cctx.drvflags |= SFRT_DRIVER_VERSION;
@@ -158,7 +178,7 @@ int sfrt_get_driver_ctx(
 			nunits++;
 	}
 
-	if (!(ctx = sfrt_driver_ctx_alloc(meta,&cctx,nunits)))
+	if (!(ctx = sfrt_driver_ctx_alloc(meta,fdctx,&cctx,nunits)))
 		return sfrt_get_driver_ctx_fail(meta);
 
 	ctx->ctx.program	= program;
@@ -191,3 +211,39 @@ const struct sfrt_source_version * sfrt_source_version(void)
 {
 	return &sfrt_src_version;
 }
+
+int sfrt_get_driver_fdctx(
+	const struct sfrt_driver_ctx *	dctx,
+	struct sfrt_fd_ctx *		fdctx)
+{
+	struct sfrt_driver_ctx_impl *	ictx;
+
+	ictx = sfrt_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 sfrt_set_driver_fdctx(
+	struct sfrt_driver_ctx *	dctx,
+	const struct sfrt_fd_ctx *	fdctx)
+{
+	struct sfrt_driver_ctx_impl *	ictx;
+
+	ictx = sfrt_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;
+}
diff --git a/src/internal/sofort_driver_impl.h b/src/internal/sofort_driver_impl.h
index 640aa2d..a7615ad 100644
--- a/src/internal/sofort_driver_impl.h
+++ b/src/internal/sofort_driver_impl.h
@@ -23,6 +23,7 @@ enum app_tags {
 struct sfrt_driver_ctx_impl {
 	struct sfrt_common_ctx          cctx;
 	struct sfrt_driver_ctx	        ctx;
+	struct sfrt_fd_ctx		fdctx;
 	const  struct sfrt_unit_ctx *   euctx;
 	const  char *                   eunit;
 	struct sfrt_error_info **       errinfp;
@@ -62,4 +63,46 @@ static inline void sfrt_driver_set_ectx(
 	ictx->eunit = unit;
 }
 
+static inline int sfrt_driver_fdin(const struct sfrt_driver_ctx * dctx)
+{
+	struct sfrt_fd_ctx fdctx;
+	sfrt_get_driver_fdctx(dctx,&fdctx);
+	return fdctx.fdin;
+}
+
+static inline int sfrt_driver_fdout(const struct sfrt_driver_ctx * dctx)
+{
+	struct sfrt_fd_ctx fdctx;
+	sfrt_get_driver_fdctx(dctx,&fdctx);
+	return fdctx.fdout;
+}
+
+static inline int sfrt_driver_fderr(const struct sfrt_driver_ctx * dctx)
+{
+	struct sfrt_fd_ctx fdctx;
+	sfrt_get_driver_fdctx(dctx,&fdctx);
+	return fdctx.fderr;
+}
+
+static inline int sfrt_driver_fdlog(const struct sfrt_driver_ctx * dctx)
+{
+	struct sfrt_fd_ctx fdctx;
+	sfrt_get_driver_fdctx(dctx,&fdctx);
+	return fdctx.fdlog;
+}
+
+static inline int sfrt_driver_fdcwd(const struct sfrt_driver_ctx * dctx)
+{
+	struct sfrt_fd_ctx fdctx;
+	sfrt_get_driver_fdctx(dctx,&fdctx);
+	return fdctx.fdcwd;
+}
+
+static inline int sfrt_driver_fddst(const struct sfrt_driver_ctx * dctx)
+{
+	struct sfrt_fd_ctx fdctx;
+	sfrt_get_driver_fdctx(dctx,&fdctx);
+	return fdctx.fddst;
+}
+
 #endif
diff --git a/src/sofort.c b/src/sofort.c
index 112823d..d52059e 100644
--- a/src/sofort.c
+++ b/src/sofort.c
@@ -2,5 +2,5 @@
 
 int main(int argc, char ** argv, char ** envp)
 {
-	return sfrt_main(argc,argv,envp);
+	return sfrt_main(argc,argv,envp,0);
 }