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First stages of (re-)writing busybox's tar creation support.
-Erik
This commit is contained in:
parent
deea048bec
commit
6acaa40f27
10
Changelog
10
Changelog
@ -507,11 +507,11 @@
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* from Matthew Grant <grantma@anathoth.gen.nz>
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to accomodate glibc timezone support. I then ripped out GNU
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getopt.
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* mkswap -- new version merged from util-linux. Can now make
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* >128Meg swaps. Replaced the old and star, unstar, and tarcat
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* with the tar
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implementation from sash. Now tar behaves as god intended it
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to (i.e. tar -xvf <file> and tar -cf <file> <dir> work).
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* mkswap -- new version merged from util-linux. Can now make
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>128Meg swaps.
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* Replaced the old and star, unstar, and tarcat with the tar
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implementation from sash. Now tar behaves as god intended it
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to (i.e. tar -xvf <file> and tar -cf <file> <dir> work).
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* dd -- rewritten. Can with with files, stdin, stdout. Added the
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* following new apps: loadfont -- added from debian boot floppies
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* chroot -- added based on a patch from Paolo Molaro
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125
archival/tar.c
125
archival/tar.c
@ -1,10 +1,24 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Mini tar implementation for busybox
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*
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* Mini tar implementation for busybox Note, that as of BusyBox 0.43 tar has
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* been completely rewritten from the ground up. It still has remnents of the
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* old code lying about, but it pretty different (i.e. cleaner, less global
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* variables, etc)
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* Based in part in the tar implementation in sash
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* Copyright (c) 1999 by David I. Bell
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* Permission is granted to use, distribute, or modify this source,
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* provided that this copyright notice remains intact.
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* Permission to distribute sash derived code under the GPL has been granted.
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*
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* Based in part on the tar implementation in busybox-0.28
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* Copyright (C) 1995 Bruce Perens
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* This is free software under the GNU General Public License.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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@ -147,17 +161,9 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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#ifdef BB_FEATURE_TAR_CREATE
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/*
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* Local procedures to save files into a tar file.
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*/
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static void saveFile(const char *fileName, int seeLinks);
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static void saveRegularFile(const char *fileName,
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const struct stat *statbuf);
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static void saveDirectory(const char *fileName,
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const struct stat *statbuf);
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static void writeHeader(const char *fileName, const struct stat *statbuf);
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static void writeTarFile(int argc, char **argv);
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static void writeTarBlock(const char *buf, int len);
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/* Local procedures to save files into a tar file. */
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static int writeTarFile(const char* tarName, int extractFlag, int listFlag,
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int tostdoutFlag, int verboseFlag, int argc, char **argv);
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static int putOctal(char *cp, int len, long value);
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#endif
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@ -242,7 +248,7 @@ extern int tar_main(int argc, char **argv)
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#ifndef BB_FEATURE_TAR_CREATE
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fatalError( "This version of tar was not compiled with tar creation support.\n");
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#else
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exit(writeTarFile(argc, argv));
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exit(writeTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, argc, argv));
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#endif
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} else {
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exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag));
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@ -347,10 +353,9 @@ tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
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/* make the final component, just in case it was
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* omitted by createPath() (which will skip the
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* directory if it doesn't have a terminating '/') */
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mkdir(header->name, header->mode);
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/* Now set permissions etc for the new directory */
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fixUpPermissions(header);
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if (mkdir(header->name, header->mode) == 0) {
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fixUpPermissions(header);
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}
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}
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static void
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@ -616,3 +621,89 @@ endgame:
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return( FALSE);
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}
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#ifdef BB_FEATURE_TAR_CREATE
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/* Put an octal string into the specified buffer.
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* The number is zero and space padded and possibly null padded.
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* Returns TRUE if successful. */
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static int putOctal (char *cp, int len, long value)
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{
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int tempLength;
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char *tempString;
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char tempBuffer[32];
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/* Create a string of the specified length with an initial space,
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* leading zeroes and the octal number, and a trailing null. */
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tempString = tempBuffer;
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sprintf (tempString, " %0*lo", len - 2, value);
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tempLength = strlen (tempString) + 1;
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/* If the string is too large, suppress the leading space. */
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if (tempLength > len) {
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tempLength--;
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tempString++;
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}
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/* If the string is still too large, suppress the trailing null. */
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if (tempLength > len)
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tempLength--;
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/* If the string is still too large, fail. */
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if (tempLength > len)
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return FALSE;
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/* Copy the string to the field. */
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memcpy (cp, tempString, len);
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return TRUE;
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}
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static int fileAction(const char *fileName, struct stat *statbuf)
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{
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fprintf(stdout, "%s\n", fileName);
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return (TRUE);
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}
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static int writeTarFile(const char* tarName, int extractFlag, int listFlag,
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int tostdoutFlag, int verboseFlag, int argc, char **argv)
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{
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int tarFd=0;
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//int errorFlag=FALSE;
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//TarHeader rawHeader;
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//TarInfo header;
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//int alreadyWarned=FALSE;
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char *directory = ".";
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//int skipFileFlag=FALSE;
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/* Open the tar file for writing. */
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if (!strcmp(tarName, "-"))
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tarFd = fileno(stdout);
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else
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tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (tarFd < 0) {
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errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
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return ( FALSE);
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}
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/* Set the umask for this process so it doesn't
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* screw up permission setting for us later. */
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umask(0);
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/* Read the directory/files and iterate over them one at a time */
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if (recursiveAction(directory, TRUE, FALSE, FALSE,
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fileAction, fileAction) == FALSE) {
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exit(FALSE);
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}
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// TODO: DO STUFF HERE
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close(tarFd);
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return( TRUE);
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}
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#endif
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@ -161,7 +161,7 @@
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#define BB_FEATURE_REMOUNT
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//
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// Enable support for creation of tar files.
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//#define BB_FEATURE_TAR_CREATE
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#define BB_FEATURE_TAR_CREATE
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//
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//// Enable reverse sort
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//#define BB_FEATURE_SORT_REVERSE
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2
lash.c
2
lash.c
@ -1,6 +1,6 @@
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/* vi: set sw=4 ts=4: */
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/*
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* BusyBox Shell
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* lash -- the BusyBox Lame-Ass SHell
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*
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* Copyright (C) 2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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2
sh.c
2
sh.c
@ -1,6 +1,6 @@
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/* vi: set sw=4 ts=4: */
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/*
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* BusyBox Shell
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* lash -- the BusyBox Lame-Ass SHell
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*
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* Copyright (C) 2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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@ -1,6 +1,6 @@
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/* vi: set sw=4 ts=4: */
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/*
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* BusyBox Shell
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* lash -- the BusyBox Lame-Ass SHell
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*
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* Copyright (C) 2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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125
tar.c
125
tar.c
@ -1,10 +1,24 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Mini tar implementation for busybox
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*
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* Mini tar implementation for busybox Note, that as of BusyBox 0.43 tar has
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* been completely rewritten from the ground up. It still has remnents of the
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* old code lying about, but it pretty different (i.e. cleaner, less global
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* variables, etc)
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* Based in part in the tar implementation in sash
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* Copyright (c) 1999 by David I. Bell
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* Permission is granted to use, distribute, or modify this source,
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* provided that this copyright notice remains intact.
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* Permission to distribute sash derived code under the GPL has been granted.
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*
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* Based in part on the tar implementation in busybox-0.28
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* Copyright (C) 1995 Bruce Perens
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* This is free software under the GNU General Public License.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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@ -147,17 +161,9 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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#ifdef BB_FEATURE_TAR_CREATE
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/*
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* Local procedures to save files into a tar file.
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*/
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static void saveFile(const char *fileName, int seeLinks);
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static void saveRegularFile(const char *fileName,
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const struct stat *statbuf);
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static void saveDirectory(const char *fileName,
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const struct stat *statbuf);
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static void writeHeader(const char *fileName, const struct stat *statbuf);
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static void writeTarFile(int argc, char **argv);
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static void writeTarBlock(const char *buf, int len);
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/* Local procedures to save files into a tar file. */
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static int writeTarFile(const char* tarName, int extractFlag, int listFlag,
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int tostdoutFlag, int verboseFlag, int argc, char **argv);
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static int putOctal(char *cp, int len, long value);
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#endif
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@ -242,7 +248,7 @@ extern int tar_main(int argc, char **argv)
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#ifndef BB_FEATURE_TAR_CREATE
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fatalError( "This version of tar was not compiled with tar creation support.\n");
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#else
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exit(writeTarFile(argc, argv));
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exit(writeTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, argc, argv));
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#endif
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} else {
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exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag));
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@ -347,10 +353,9 @@ tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
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/* make the final component, just in case it was
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* omitted by createPath() (which will skip the
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* directory if it doesn't have a terminating '/') */
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mkdir(header->name, header->mode);
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/* Now set permissions etc for the new directory */
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fixUpPermissions(header);
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if (mkdir(header->name, header->mode) == 0) {
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fixUpPermissions(header);
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}
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}
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static void
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@ -616,3 +621,89 @@ endgame:
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return( FALSE);
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}
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#ifdef BB_FEATURE_TAR_CREATE
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/* Put an octal string into the specified buffer.
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* The number is zero and space padded and possibly null padded.
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* Returns TRUE if successful. */
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static int putOctal (char *cp, int len, long value)
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{
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int tempLength;
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char *tempString;
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char tempBuffer[32];
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/* Create a string of the specified length with an initial space,
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* leading zeroes and the octal number, and a trailing null. */
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tempString = tempBuffer;
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sprintf (tempString, " %0*lo", len - 2, value);
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tempLength = strlen (tempString) + 1;
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/* If the string is too large, suppress the leading space. */
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if (tempLength > len) {
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tempLength--;
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tempString++;
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}
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/* If the string is still too large, suppress the trailing null. */
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if (tempLength > len)
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tempLength--;
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/* If the string is still too large, fail. */
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if (tempLength > len)
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return FALSE;
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/* Copy the string to the field. */
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memcpy (cp, tempString, len);
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return TRUE;
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}
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static int fileAction(const char *fileName, struct stat *statbuf)
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{
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fprintf(stdout, "%s\n", fileName);
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return (TRUE);
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}
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static int writeTarFile(const char* tarName, int extractFlag, int listFlag,
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int tostdoutFlag, int verboseFlag, int argc, char **argv)
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{
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int tarFd=0;
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//int errorFlag=FALSE;
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//TarHeader rawHeader;
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//TarInfo header;
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//int alreadyWarned=FALSE;
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char *directory = ".";
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//int skipFileFlag=FALSE;
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/* Open the tar file for writing. */
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if (!strcmp(tarName, "-"))
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tarFd = fileno(stdout);
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else
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tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (tarFd < 0) {
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errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
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return ( FALSE);
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}
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/* Set the umask for this process so it doesn't
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* screw up permission setting for us later. */
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umask(0);
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/* Read the directory/files and iterate over them one at a time */
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if (recursiveAction(directory, TRUE, FALSE, FALSE,
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fileAction, fileAction) == FALSE) {
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exit(FALSE);
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}
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// TODO: DO STUFF HERE
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close(tarFd);
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return( TRUE);
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}
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#endif
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Loading…
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Block a user