driver: implemented and integrated the -t (preserve atime) command-line option.

3 files changed, 73 insertions, 0 deletions

diff --git a/src/internal/tpax_driver_impl.h b/src/internal/tpax_driver_impl.h
index 1345c32..1e898e9 100644
--- a/src/internal/tpax_driver_impl.h
+++ b/src/internal/tpax_driver_impl.h
@@ -45,6 +45,7 @@ enum app_tags {
 	TAG_NORECURSE,
 	TAG_STRICT_PATH,
 	TAG_PURE_PATH,
+	TAG_PRESERVE_ATIME,
 };
 
 struct tpax_dirent {
diff --git a/src/internal/tpax_ftime_impl.c b/src/internal/tpax_ftime_impl.c
new file mode 100644
index 0000000..19c6d7b
--- /dev/null
+++ b/src/internal/tpax_ftime_impl.c
@@ -0,0 +1,48 @@
+/**************************************************************/
+/*  tpax: a topological pax implementation                    */
+/*  Copyright (C) 2020--2024  SysDeer Technologies, LLC       */
+/*  Released under GPLv2 and GPLv3; see COPYING.TPAX.         */
+/**************************************************************/
+
+#include <time.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include "tpax_ftime_impl.h"
+#include "tpax_driver_impl.h"
+#include "tpax_visibility_impl.h"
+
+tpax_hidden void tpax_ftime_restore(
+	const struct tpax_driver_ctx *  dctx,
+	int                             fd,
+	const struct stat *             refst)
+{
+	struct timespec ts[2];
+
+	if (dctx->cctx->drvflags & TPAX_DRIVER_PRESERVE_ATIME) {
+		ts[0].tv_sec  = refst->st_atim.tv_sec;
+		ts[0].tv_nsec = refst->st_atim.tv_nsec;
+	} else {
+		ts[0].tv_nsec = UTIME_OMIT;
+	}
+
+	if (dctx->cctx->drvflags & TPAX_DRIVER_PRESERVE_MTIME) {
+		ts[1].tv_sec  = refst->st_mtim.tv_sec;
+		ts[1].tv_nsec = refst->st_mtim.tv_nsec;
+	} else {
+		ts[1].tv_nsec = UTIME_OMIT;
+	}
+
+	if ((ts[0].tv_nsec != UTIME_OMIT) || (ts[1].tv_nsec != UTIME_OMIT)) {
+		futimens(fd,ts);
+	}
+}
+
+tpax_hidden void tpax_ftime_restore_and_close(
+	const struct tpax_driver_ctx *  dctx,
+	int                             fd,
+	const struct stat *             refst)
+{
+	tpax_ftime_restore(dctx,fd,refst);
+	close(fd);
+}
diff --git a/src/internal/tpax_ftime_impl.h b/src/internal/tpax_ftime_impl.h
new file mode 100644
index 0000000..2d0e981
--- /dev/null
+++ b/src/internal/tpax_ftime_impl.h
@@ -0,0 +1,24 @@
+/**************************************************************/
+/*  tpax: a topological pax implementation                    */
+/*  Copyright (C) 2020--2024  SysDeer Technologies, LLC       */
+/*  Released under GPLv2 and GPLv3; see COPYING.TPAX.         */
+/**************************************************************/
+
+#ifndef TPAX_FTIME_IMPL_H
+#define TPAX_FTIME_IMPL_H
+
+#include <time.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include "tpax_driver_impl.h"
+
+void tpax_ftime_restore(
+	const struct tpax_driver_ctx *,
+	int fd, const struct stat *);
+
+void tpax_ftime_restore_and_close(
+	const struct tpax_driver_ctx *,
+	int fd, const struct stat *);
+
+#endif