diff options
| -rw-r--r-- | archival/tar.c | 56 |
1 files changed, 10 insertions, 46 deletions
diff --git a/archival/tar.c b/archival/tar.c index 91232bc..5d9e870 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -23,21 +23,10 @@ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -#include <fcntl.h> -#include <getopt.h> -#include <search.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <fnmatch.h> -#include <string.h> -#include <errno.h> -#include <signal.h> -#include <sys/wait.h> -#include <sys/socket.h> -#include <sys/sysmacros.h> /* major() and minor() */ -#include "unarchive.h" #include "busybox.h" +#include "unarchive.h" +#include <fnmatch.h> +#include <getopt.h> #ifdef CONFIG_FEATURE_TAR_CREATE @@ -192,26 +181,6 @@ static int putOctal(char *cp, int len, long value) return TRUE; } -/* Pad file to TAR_BLOCK_SIZE with zeros */ -static void block_write_zeroes(int fd, size_t size) -{ - char zerobuf[TAR_BLOCK_SIZE]; - memset(zerobuf, 0, size); - /* No point in trying to continue on error */ - if (full_write(fd, zerobuf, size) < 0) - bb_perror_msg_and_die("write"); -} - -static size_t pad_block_write(int fd, size_t size) -{ - size_t rem = (TAR_BLOCK_SIZE - size) & (TAR_BLOCK_SIZE-1); - if (rem) { - block_write_zeroes(fd, rem); - size += rem; - } - return size; -} - /* Write out a tar header for the specified file/directory/whatever */ static int writeTarHeader(struct TarBallInfo *tbInfo, const char *header_name, const char *fileName, struct stat *statbuf) @@ -221,7 +190,7 @@ static int writeTarHeader(struct TarBallInfo *tbInfo, const unsigned char *cp = (const unsigned char *) &header; ssize_t size = sizeof(struct TarHeader); - memset(&header, 0, size); + bzero(&header, size); safe_strncpy(header.name, header_name, sizeof(header.name)); @@ -288,14 +257,7 @@ static int writeTarHeader(struct TarBallInfo *tbInfo, putOctal(header.chksum, 7, chksum); /* Now write the header out to disk */ - size = full_write(tbInfo->tarFd, (char *) &header, - sizeof(struct TarHeader)); - if (size < 0) { - bb_error_msg(bb_msg_io_error, fileName); - return FALSE; - } - /* Pad the header up to the tar block size */ - size = pad_block_write(tbInfo->tarFd, size); + xwrite(tbInfo->tarFd, &header, sizeof(struct TarHeader)); /* Now do the verbose thing (or not) */ @@ -421,7 +383,9 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf, close(inputFileFd); /* Pad the file up to the tar block size */ - readSize = pad_block_write(tbInfo->tarFd, readSize); + readSize = (TAR_BLOCK_SIZE - readSize) & (TAR_BLOCK_SIZE-1); + bzero(bb_common_bufsiz1, readSize); + xwrite(tbInfo->tarFd, bb_common_bufsiz1, readSize); } return TRUE; @@ -516,8 +480,8 @@ static int writeTarFile(const int tar_fd, const int verboseFlag, include = include->link; } /* Write two empty blocks to the end of the archive */ - block_write_zeroes(tbInfo.tarFd, TAR_BLOCK_SIZE); - block_write_zeroes(tbInfo.tarFd, TAR_BLOCK_SIZE); + bzero(bb_common_bufsiz1, 2*TAR_BLOCK_SIZE); + xwrite(tbInfo.tarFd, bb_common_bufsiz1, 2*TAR_BLOCK_SIZE); /* To be pedantically correct, we would check if the tarball * is smaller than 20 tar blocks, and pad it if it was smaller, |