From af498808d3ac418dc84be14e42cae054afa5bac6 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 31 May 2020 18:19:48 +0000
Subject: tpax_archive_append(): only create/write snapshots for regular files.

---
 src/logic/tpax_archive_append.c | 49 +++++++++++++++++++++++------------------
 1 file changed, 28 insertions(+), 21 deletions(-)

(limited to 'src')

diff --git a/src/logic/tpax_archive_append.c b/src/logic/tpax_archive_append.c
index dfdd92c..caa2606 100644
--- a/src/logic/tpax_archive_append.c
+++ b/src/logic/tpax_archive_append.c
@@ -114,27 +114,30 @@ int tpax_archive_append(
 	membuf = 0;
 	fdtmp  = -1;
 
-	if ((buf = tpax_get_driver_anon_map_addr(dctx,&buflen)))
-		if (buflen >= (cmplen = uctx->st->st_size))
-			membuf = buf;
-
-	if (ssizeof(sbuf) >= (uctx->st->st_size))
-		membuf = sbuf;
-
-	/* snapshot */
-	if (membuf) {
-		if (tpax_file_create_memory_snapshot(
-				dctx,*uctx->path,
-				uctx->st,membuf) < 0)
-			return TPAX_NESTED_ERROR(dctx);
-	} else {
-		if ((fdtmp = tpax_file_create_tmpfs_snapshot(
-				dctx,*uctx->path,
-				uctx->st)) < 0)
-			return TPAX_NESTED_ERROR(dctx);
-
-		if (lseek(fdtmp,0,SEEK_SET) < 0)
-			return TPAX_SYSTEM_ERROR(dctx);
+	/* associated data? */
+	if S_ISREG(uctx->st->st_mode) {
+		if ((buf = tpax_get_driver_anon_map_addr(dctx,&buflen)))
+			if (buflen >= (cmplen = uctx->st->st_size))
+				membuf = buf;
+
+		if (ssizeof(sbuf) >= (uctx->st->st_size))
+			membuf = sbuf;
+
+		/* snapshot */
+		if (membuf) {
+			if (tpax_file_create_memory_snapshot(
+					dctx,*uctx->path,
+					uctx->st,membuf) < 0)
+				return TPAX_NESTED_ERROR(dctx);
+		} else {
+			if ((fdtmp = tpax_file_create_tmpfs_snapshot(
+					dctx,*uctx->path,
+					uctx->st)) < 0)
+				return TPAX_NESTED_ERROR(dctx);
+
+			if (lseek(fdtmp,0,SEEK_SET) < 0)
+				return TPAX_SYSTEM_ERROR(dctx);
+		}
 	}
 
 	/* append header */
@@ -147,6 +150,10 @@ int tpax_archive_append(
 
 	tpax_set_driver_cpos(dctx,dpos);
 
+	/* all done? */
+	if (!(S_ISREG(uctx->st->st_mode)))
+		return 0;
+
 	/* append data from snapshot */
 	if (fdtmp >= 0) {
 		if (!buf) {
-- 
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