diff options
Diffstat (limited to 'archival')
| -rw-r--r-- | archival/tar.c | 125 |
1 files changed, 108 insertions, 17 deletions
diff --git a/archival/tar.c b/archival/tar.c index 477487a..37a28a3 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -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 + |