From e569553aa0e510117b2b671e036a9de62cde91c9 Mon Sep 17 00:00:00 2001
From: Rob Landley
Date: Mon, 9 Jan 2006 03:07:44 +0000
Subject: Bug 547: writing out the tar file header before we confirm we can
 actually open and read from the file isn't something we can recover from
 after the fact.  Resequence things to check first, write second.

---
 archival/tar.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/archival/tar.c b/archival/tar.c
index cd89a75..d5fa954 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -331,6 +331,7 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf,
 {
 	struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
 	const char *header_name;
+	int inputFileFd = -1;
 
 	/*
 	   ** Check to see if we are dealing with a hard link.
@@ -385,30 +386,32 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf,
 		return SKIP;
 	}
 
-	if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
-		return (FALSE);
-	}
-
-	/* Now, if the file is a regular file, copy it out to the tarball */
-	if ((tbInfo->hlInfo == NULL)
-		&& (S_ISREG(statbuf->st_mode))) {
-		int inputFileFd;
-		ssize_t readSize = 0;
+	/* Is this a regular file? */
+	if ((tbInfo->hlInfo == NULL) && (S_ISREG(statbuf->st_mode))) {
 
 		/* open the file we want to archive, and make sure all is well */
 		if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
 			bb_perror_msg("%s: Cannot open", fileName);
 			return (FALSE);
 		}
+	}
+
+	/* Add an entry to the tarball */
+	if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
+		return (FALSE);
+	}
+
+	/* If it was a regular file, write out the body */
+	if (inputFileFd >= 0 ) {
+		ssize_t readSize = 0;
 
 		/* write the file to the archive */
 		readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd);
+		close(inputFileFd);
 
 		/* Pad the file up to the tar block size */
 		for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++)
 			write(tbInfo->tarFd, "\0", 1);
-
-		close(inputFileFd);
 	}
 
 	return (TRUE);
-- 
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