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.
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 @@
{
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 @@
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);