1 files changed, 4 insertions, 1 deletions
diff --git a/lib/lib.c b/lib/lib.c
index 959cd46c..d1568932 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -474,7 +474,7 @@ long atolx(char *c)
 // Return how long the file at fd is, if there's any way to determine it.
 off_t fdlength(int fd)
 {
-	off_t bottom = 0, top = 0, pos;
+	off_t bottom = 0, top = 0, pos, old;
 	int size;
 
 	// If the ioctl works for this, return it.
@@ -485,6 +485,7 @@ off_t fdlength(int fd)
 	// block devices don't do BLKGETSIZE right.)  This should probably have
 	// a CONFIG option...
 
+	old = lseek(fd, 0, SEEK_CUR);
 	do {
 		char temp;
 
@@ -506,6 +507,8 @@ off_t fdlength(int fd)
 		}
 	} while (bottom + 1 != top);
 
+	lseek(fd, old, SEEK_SET);
+
 	return pos + 1;
 }