diff --git a/archival/libunarchive/open_transformer.c b/archival/libunarchive/open_transformer.c
index d6f5e62..3c551de 100644
--- a/archival/libunarchive/open_transformer.c
+++ b/archival/libunarchive/open_transformer.c
@@ -15,10 +15,10 @@
 	USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd),
 	const char *transform_prog)
 {
-	int fd_pipe[2];
+	struct fd_pair fd_pipe;
 	int pid;
 
-	xpipe(fd_pipe);
+	xpiped_pair(fd_pipe);
 
 #if BB_MMU
 	pid = fork();
@@ -30,12 +30,12 @@
 
 	if (pid == 0) {
 		/* child process */
-		close(fd_pipe[0]); /* We don't want to read from the parent */
+		close(fd_pipe.rd); /* We don't want to read from the parent */
 		// FIXME: error check?
 #if BB_MMU
-		transformer(src_fd, fd_pipe[1]);
+		transformer(src_fd, fd_pipe.wr);
 		if (ENABLE_FEATURE_CLEAN_UP) {
-			close(fd_pipe[1]); /* Send EOF */
+			close(fd_pipe.wr); /* Send EOF */
 			close(src_fd);
 		}
 		exit(0);
@@ -43,7 +43,7 @@
 		{
 			char *argv[4];
 			xmove_fd(src_fd, 0);
-			xmove_fd(fd_pipe[1], 1);
+			xmove_fd(fd_pipe.wr, 1);
 			argv[0] = (char*)transform_prog;
 			argv[1] = (char*)"-cf";
 			argv[2] = (char*)"-";
@@ -56,7 +56,7 @@
 	}
 
 	/* parent process */
-	close(fd_pipe[1]); /* Don't want to write to the child */
+	close(fd_pipe.wr); /* Don't want to write to the child */
 
-	return fd_pipe[0];
+	return fd_pipe.rd;
 }
diff --git a/archival/libunarchive/seek_by_jump.c b/archival/libunarchive/seek_by_jump.c
index edbf46b..8b5f3e8 100644
--- a/archival/libunarchive/seek_by_jump.c
+++ b/archival/libunarchive/seek_by_jump.c
@@ -6,7 +6,7 @@
 #include "libbb.h"
 #include "unarchive.h"
 
-void seek_by_jump(const archive_handle_t *archive_handle, const unsigned int amount)
+void seek_by_jump(const archive_handle_t *archive_handle, unsigned amount)
 {
 	if (lseek(archive_handle->src_fd, (off_t) amount, SEEK_CUR) == (off_t) -1) {
 #if ENABLE_FEATURE_UNARCHIVE_TAPE
diff --git a/archival/libunarchive/seek_by_read.c b/archival/libunarchive/seek_by_read.c
index 452d82d..1f2b805 100644
--- a/archival/libunarchive/seek_by_read.c
+++ b/archival/libunarchive/seek_by_read.c
@@ -6,10 +6,10 @@
 #include "libbb.h"
 #include "unarchive.h"
 
-/*  If we are reading through a pipe(), or from stdin then we can't lseek,
+/*  If we are reading through a pipe, or from stdin then we can't lseek,
  *  we must read and discard the data to skip over it.
  */
-void seek_by_read(const archive_handle_t *archive_handle, const unsigned int jump_size)
+void seek_by_read(const archive_handle_t *archive_handle, unsigned jump_size)
 {
 	if (jump_size)
 		bb_copyfd_exact_size(archive_handle->src_fd, -1, jump_size);
diff --git a/archival/tar.c b/archival/tar.c
index a8ff7b8..4ec454b 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -521,14 +521,14 @@
 
 		volatile int vfork_exec_errno = 0;
 #if WAIT_FOR_CHILD
-		struct { int rd; int wr; } gzipStatusPipe;
+		struct fd_pair gzipStatusPipe;
 #endif
-		struct { int rd; int wr; } gzipDataPipe;
+		struct fd_pair gzipDataPipe;
 		const char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
 
-		xpipe(&gzipDataPipe.rd);
+		xpiped_pair(gzipDataPipe);
 #if WAIT_FOR_CHILD
-		xpipe(&gzipStatusPipe.rd);
+		xpiped_pair(gzipStatusPipe);
 #endif
 
 		signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */