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First stages of (re-)writing busybox's tar creation support.

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-Erik
This commit is contained in:
Erik Andersen
2000-03-26 14:03:20 +00:00
parent deea048bec
commit 6acaa40f27
7 changed files with 225 additions and 43 deletions
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125
tar.c
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@@ -1,10 +1,24 @@
/* vi: set sw=4 ts=4: */
/*
* Mini tar implementation for busybox
*
* Mini tar implementation for busybox Note, that as of BusyBox 0.43 tar has
* been completely rewritten from the ground up. It still has remnents of the
* old code lying about, but it pretty different (i.e. cleaner, less global
* variables, etc)
*
* Copyright (C) 1999 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* Based in part in the tar implementation in sash
* Copyright (c) 1999 by David I. Bell
* Permission is granted to use, distribute, or modify this source,
* provided that this copyright notice remains intact.
* Permission to distribute sash derived code under the GPL has been granted.
*
* Based in part on the tar implementation in busybox-0.28
* Copyright (C) 1995 Bruce Perens
* This is free software under the GNU General Public License.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
@@ -147,17 +161,9 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
#ifdef BB_FEATURE_TAR_CREATE
/*
* Local procedures to save files into a tar file.
*/
static void saveFile(const char *fileName, int seeLinks);
static void saveRegularFile(const char *fileName,
const struct stat *statbuf);
static void saveDirectory(const char *fileName,
const struct stat *statbuf);
static void writeHeader(const char *fileName, const struct stat *statbuf);
static void writeTarFile(int argc, char **argv);
static void writeTarBlock(const char *buf, int len);
/* Local procedures to save files into a tar file. */
static int writeTarFile(const char* tarName, int extractFlag, int listFlag,
int tostdoutFlag, int verboseFlag, int argc, char **argv);
static int putOctal(char *cp, int len, long value);
#endif
@@ -242,7 +248,7 @@ extern int tar_main(int argc, char **argv)
#ifndef BB_FEATURE_TAR_CREATE
fatalError( "This version of tar was not compiled with tar creation support.\n");
#else
exit(writeTarFile(argc, argv));
exit(writeTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, argc, argv));
#endif
} else {
exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag));
@@ -347,10 +353,9 @@ tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
/* make the final component, just in case it was
* omitted by createPath() (which will skip the
* directory if it doesn't have a terminating '/') */
mkdir(header->name, header->mode);
/* Now set permissions etc for the new directory */
fixUpPermissions(header);
if (mkdir(header->name, header->mode) == 0) {
fixUpPermissions(header);
}
}
static void
@@ -616,3 +621,89 @@ endgame:
return( FALSE);
}
#ifdef BB_FEATURE_TAR_CREATE
/* Put an octal string into the specified buffer.
* The number is zero and space padded and possibly null padded.
* Returns TRUE if successful. */
static int putOctal (char *cp, int len, long value)
{
int tempLength;
char *tempString;
char tempBuffer[32];
/* Create a string of the specified length with an initial space,
* leading zeroes and the octal number, and a trailing null. */
tempString = tempBuffer;
sprintf (tempString, " %0*lo", len - 2, value);
tempLength = strlen (tempString) + 1;
/* If the string is too large, suppress the leading space. */
if (tempLength > len) {
tempLength--;
tempString++;
}
/* If the string is still too large, suppress the trailing null. */
if (tempLength > len)
tempLength--;
/* If the string is still too large, fail. */
if (tempLength > len)
return FALSE;
/* Copy the string to the field. */
memcpy (cp, tempString, len);
return TRUE;
}
static int fileAction(const char *fileName, struct stat *statbuf)
{
fprintf(stdout, "%s\n", fileName);
return (TRUE);
}
static int writeTarFile(const char* tarName, int extractFlag, int listFlag,
int tostdoutFlag, int verboseFlag, int argc, char **argv)
{
int tarFd=0;
//int errorFlag=FALSE;
//TarHeader rawHeader;
//TarInfo header;
//int alreadyWarned=FALSE;
char *directory = ".";
//int skipFileFlag=FALSE;
/* Open the tar file for writing. */
if (!strcmp(tarName, "-"))
tarFd = fileno(stdout);
else
tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (tarFd < 0) {
errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
return ( FALSE);
}
/* Set the umask for this process so it doesn't
* screw up permission setting for us later. */
umask(0);
/* Read the directory/files and iterate over them one at a time */
if (recursiveAction(directory, TRUE, FALSE, FALSE,
fileAction, fileAction) == FALSE) {
exit(FALSE);
}
// TODO: DO STUFF HERE
close(tarFd);
return( TRUE);
}
#endif