[hackers] [sltar] Seems to extract now properly; renaming tar to sltar || gottox

From: <hg_AT_suckless.org>
Date: Sun, 11 Nov 2012 17:23:38 +0100 (CET)

changeset: 1:5ba7cd4c76bb
user: gottox_AT_rootkit.lan
date: Wed Dec 19 10:12:10 2007 +0100
files: Makefile config.mk tar.c
description:
Seems to extract now properly; renaming tar to sltar


diff -r d3c9b960c288 -r 5ba7cd4c76bb Makefile
--- a/Makefile Wed Dec 19 00:16:32 2007 +0100
+++ b/Makefile Wed Dec 19 10:12:10 2007 +0100
_AT_@ -1,11 +1,11 @@
-# tar - a minimal implementation of tar
+# sltar - a minimal implementation of tar
 # (c) 2007 Enno Boland
 
 include config.mk
 
-SRC = tar.c
+SRC = sltar.c
 OBJ = ${SRC:.c=.o}
-TARGET = tar
+TARGET = sltar
 
 all: options ${TARGET}
 
diff -r d3c9b960c288 -r 5ba7cd4c76bb config.mk
--- a/config.mk Wed Dec 19 00:16:32 2007 +0100
+++ b/config.mk Wed Dec 19 10:12:10 2007 +0100
_AT_@ -1,4 +1,4 @@
-# tar version
+# sltar version
 VERSION = 0.0
 
 # Customize below to fit your system
diff -r d3c9b960c288 -r 5ba7cd4c76bb tar.c
--- a/tar.c Wed Dec 19 00:16:32 2007 +0100
+++ b/tar.c Wed Dec 19 10:12:10 2007 +0100
_AT_@ -1,57 +1,76 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
 
 #define USAGE { puts("tar [xt]"); exit(EXIT_FAILURE); }
-#define FORBLOCK(x,b) for(l = x; l > 0 && (n = read(0,(void *)(b),512)) > 0; l -= n)
 
-/* POSIX tar Header Block, from POSIX 1003.1-1990 */
-struct Header
-{
- /* Header: 512 Byte */
- char name[100]; /* 0-99 */
- char mode[8]; /* 100-107 */
- char uid[8]; /* 108-115 */
- char gid[8]; /* 116-123 */
- char size[12]; /* 124-135 */
- char mtime[12]; /* 136-147 */
- char chksum[8]; /* 148-155 */
- char typeflag; /* 156-156 */
- char linkname[100]; /* 157-256 */
- char magic[6]; /* 257-262 */
- char version[2]; /* 263-264 */
- char uname[32]; /* 265-296 */
- char gname[32]; /* 297-328 */
- char devmajor[8]; /* 329-336 */
- char devminor[8]; /* 337-344 */
- char prefix[155]; /* 345-499 */
- char padding[12]; /* 500-512 */
+enum Header {
+ MODE = 100, UID = 108, GID = 116, SIZE = 124, MTIME = 136,
+ TYPE = 156, LINK = 157, DEVMAJOR = 329, DEVMINOR = 337,
+ END = 512
 };
 
 int main(int argc, char *argv[]) {
- int a, l, n;
- char b[512];
- struct Header h;
+ int a, l;
+ char b[END],fname[101],lname[101];
+ FILE *f;
 
         if((argc != 2 || (a = argv[1][0]) == '\0') ||
                         argv[1][1] != '\0' || (a != 't' && a != 'x'))
                 USAGE;
- while(1) {
- FORBLOCK(sizeof(h),&h);
- if(*h.name == '\0')
- break;
- else if(l != 0) {
- fputs("Garbage!\n",stderr);
- return EXIT_FAILURE;
+ lname[100] = fname[100] = '\0';
+ for(l = 0, f = NULL; fread(b,END,1,stdin); l -= END) {
+ if(l <= 0) {
+ if(*b == '\0')
+ break;
+ memcpy(fname,b,100);
+ memcpy(lname,b+LINK,100);
+ switch(a) {
+ case 't':
+ puts(fname);
+ break;
+ case 'x':
+ if(f) {
+ fclose(f);
+ f = NULL;
+ }
+ unlink(b);
+ switch(b[TYPE]) {
+ case '0': /* file */
+ if(!(f = fopen(b,"w")))
+ perror(fname);
+ break;
+ case '1': /* hardlink */
+ if(!link(lname,fname))
+ perror(fname);
+ break;
+ case '2': /* symlink */
+ if(!symlink(lname,fname))
+ perror(fname);
+ break;
+ case '5': /* directory */
+ if(mkdir(fname,(mode_t) strtoull(b+MODE,0,8)))
+ perror(fname);
+ break;
+ case '4': /* block device */
+ case '3': /* char device */
+ break;
+ case '6': /* fifo */
+ break;
+ default:
+ fprintf(stderr,"%s: type `%c` is not supported",fname,b[TYPE]);
+ }
+ }
+ l = strtoull(b+SIZE,0,8)+END;
                 }
- if(a == 't') {
- puts(h.name);
- FORBLOCK(strtoull(h.size,0,8),b);
- }
- else {
- FORBLOCK(strtoull(h.size,0,8),b)
- puts("open, write, close, chmod, chown");
+ else if(a == 'x' && f) {
+
                 }
         }
+ if(f)
+ fclose(f);
         return EXIT_SUCCESS;
 }
Received on Sun Nov 11 2012 - 17:23:38 CET