Reorganise unarchive functions, new files, removed some

libbb/add_from_archive_list.c

@@ -0,0 +1,31 @@
+/*
+ *  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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "libbb.h"
+
+file_headers_t *add_from_archive_list(file_headers_t *master_list, file_headers_t *new_list, const char *filename)
+{
+	file_headers_t *list_ptr;
+
+	list_ptr = master_list;
+	while (list_ptr != NULL) {
+		if (strcmp(filename, list_ptr->name) == 0) {
+			return(append_archive_list(new_list, list_ptr));
+		}
+		list_ptr = list_ptr->next;
+	}
+	return(NULL);
+}

libbb/append_archive_list.c

@@ -0,0 +1,39 @@
+/*
+ *  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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include "libbb.h"
+
+file_headers_t *append_archive_list(file_headers_t *head, file_headers_t *tail_entry)
+{
+	file_headers_t *tail_ptr;
+	file_headers_t *new_node = (file_headers_t *) malloc(sizeof(file_headers_t));
+
+	*new_node = *tail_entry;
+	new_node->next = NULL;
+
+	if (head->name == NULL) {
+		head = new_node;
+	} else {
+		tail_ptr = head;
+		while(tail_ptr->next != NULL) {
+			tail_ptr = tail_ptr->next;
+		}
+		tail_ptr->next = new_node;
+	}
+
+	return(head);
+}

libbb/extract_archive.c

@@ -0,0 +1,132 @@
+/* 
+ *  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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <utime.h>
+#include "libbb.h"
+
+/* Extract files in the linear linked list 'extract_headers' to either
+ * filesystem, stdout or buffer depending on the value of 'function' which is
+ * described in extract_files.h 
+ *
+ * prefix doesnt have to be just a directory, it may prefix the filename as well.
+ *
+ * e.g. '/var/lib/dpkg/info/dpkg.' will extract all files to the base bath 
+ * '/var/lib/dpkg/info/' and all files/dirs created in that dir will have 
+ * 'dpkg.' as their prefix
+ *
+ * For this reason if prefix does point to a dir then it must end with a
+ * trailing '/' or else the last dir will be assumed to be the file prefix 
+ */
+
+char *extract_archive(FILE *src_stream, FILE *out_stream, file_headers_t *extract_headers, int function, const char *prefix)
+{
+	FILE *dst_stream = NULL;
+	char *full_name = NULL;
+	char *buffer = NULL;
+	size_t uncompressed_count = 0;
+	struct utimbuf t;
+
+	/* find files to extract or display */	
+	while (extract_headers != NULL) {
+		/* prefix doesnt have to be a proper path it may prepend 
+		 * the filename as well */
+		if (prefix != NULL) {
+			/* strip leading '/' in filename to extract as prefix may not be dir */
+			char *tmp_str = strchr(extract_headers->name, '/');
+			if (tmp_str == NULL) {
+				tmp_str = extract_headers->name;
+			} else {
+				tmp_str++;
+			}
+			/* Cant use concat_path_file here as prefix might not be a directory */
+			full_name = xmalloc(strlen(prefix) + strlen(tmp_str) + 1);
+			strcpy(full_name, prefix);
+			strcat(full_name, tmp_str);
+		} else {
+			full_name = extract_headers->name;
+		}
+
+		/* Seek to start of file, have to use fgetc as src_stream may be a pipe
+		 * you cant [lf]seek on pipes */
+		while (uncompressed_count < extract_headers->offset) {
+			fgetc(src_stream);
+			uncompressed_count++;
+		}
+
+		if (S_ISREG(extract_headers->mode)) {
+			if (function & extract_to_stdout) {
+				copy_file_chunk(src_stream, out_stream, extract_headers->size);			
+				uncompressed_count += extract_headers->size;
+			}
+			else if (function & extract_all_to_fs) {
+				dst_stream = wfopen(full_name, "w");
+				copy_file_chunk(src_stream, dst_stream, extract_headers->size);			
+				uncompressed_count += extract_headers->size;
+				fclose(dst_stream);
+			}
+			else if (function & extract_one_to_buffer) {
+				buffer = (char *) xmalloc(extract_headers->size + 1);
+				fread(buffer, 1, extract_headers->size, src_stream);
+				break;
+			}
+		}
+#if defined BB_DPKG | defined BB_DPKG_DEB 
+		else if (S_ISDIR(extract_headers->mode)) {
+			if (function & extract_all_to_fs) {
+				if (create_path(full_name, extract_headers->mode) == FALSE) {
+					perror_msg("Cannot mkdir %s", extract_headers->name); 
+					return NULL;
+				}
+			}
+		}
+		else if (S_ISLNK(extract_headers->mode)) {
+			if (function & extract_all_to_fs) {
+				if (symlink(extract_headers->link_name, full_name) < 0) {
+					perror_msg("Cannot create hard link from %s to '%s'", extract_headers->name, extract_headers->link_name); 
+					return NULL;
+				}
+			}
+		}
+#endif
+		if (function & extract_verbose_list) {
+			fprintf(out_stream, "%s %d/%d %8d %s ", mode_string(extract_headers->mode), 
+				extract_headers->uid, extract_headers->gid,
+				(int) extract_headers->size, time_string(extract_headers->mtime));
+		}
+
+		if ((function & extract_list) || (function & extract_verbose_list)){
+			/* fputs doesnt add a trailing \n, so use fprintf */
+			fprintf(out_stream, "%s\n", extract_headers->name);
+		}
+
+		if (function & extract_preserve_date) {
+			t.actime = extract_headers->mtime;
+			t.modtime = extract_headers->mtime;
+			utime(full_name, &t);
+		}
+		chmod(full_name, extract_headers->mode);
+		free(full_name);
+
+		extract_headers = extract_headers->next;
+	}
+
+	return(buffer);
+}
+

libbb/fgets_str.c

@@ -0,0 +1,64 @@
+/*
+ *  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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Continue reading from file until the terminating string is encountered.
+ * Return data as string.
+ * e.g. fgets_str(file, "\n"); will read till end of file
+ */
+
+char *fgets_str(FILE *file, const char *terminating_string)
+{
+	char *linebuf = NULL;
+	const int term_length = strlen(terminating_string);
+	int end_string_offset;
+	int linebufsz = 0;
+	int idx = 0;
+	int ch;
+
+	while (1) {
+		ch = fgetc(file);
+		if (ch == EOF) {
+			break;
+		}
+
+		/* grow the line buffer as necessary */
+		while (idx > linebufsz - 2) {
+			linebuf = realloc(linebuf, linebufsz += 1000); /* GROWBY */
+		}
+
+		linebuf[idx] = ch;
+		idx++;
+
+		/* Check for terminating string */
+		end_string_offset = idx - term_length;
+		if ((end_string_offset > 0) && (memcmp(&linebuf[end_string_offset], terminating_string, term_length) == 0)) {
+			idx -= term_length;
+			break;
+		}
+	}
+	if (idx == 0) {
+		return NULL;
+	}
+	linebuf[idx] = '\0';
+	return(linebuf);
+}
+

libbb/get_tar_gz_headers.c

@@ -0,0 +1,39 @@
+/*
+ *  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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include "libbb.h"
+
+file_headers_t *get_tar_gz_headers(FILE *compressed_stream)
+{
+	FILE *uncompressed_stream;
+	file_headers_t *tar_headers_tree;
+	int gunzip_pid;
+	int gz_fd ;
+
+	/* open a stream of decompressed data */
+	gz_fd = gz_open(compressed_stream, &gunzip_pid);
+	if (gz_fd == -1) {
+		error_msg("Couldnt initialise gzip stream");
+	}
+	uncompressed_stream = fdopen(gz_fd, "r");
+	tar_headers_tree = get_tar_headers(uncompressed_stream);
+	fclose(uncompressed_stream);
+	close(gz_fd);
+	gz_close(gunzip_pid);
+
+	return(tar_headers_tree);
+}

libbb/get_tar_headers.c

@@ -0,0 +1,111 @@
+/*
+ *  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
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "libbb.h"
+
+file_headers_t *get_tar_headers(FILE *tar_stream)
+{
+	typedef struct raw_tar_header {
+        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 */
+	} raw_tar_header_t;
+
+	raw_tar_header_t raw_tar_header;
+	unsigned char *temp = (unsigned char *) &raw_tar_header;
+	file_headers_t *tar_headers_list = (file_headers_t *) calloc(1, sizeof(file_headers_t));
+	file_headers_t *tar_entry;
+	long i;
+	long next_header_offset = 0;
+	long current_offset = 0;
+
+	while (fread((char *) &raw_tar_header, 1, 512, tar_stream) == 512) {
+		long sum = 0;
+		current_offset += 512;
+
+		/* Check header has valid magic, unfortunately some tar files
+		 * have empty (0'ed) tar entries at the end, which will
+		 * cause this to fail, so fail silently for now
+		 */
+		if (strncmp(raw_tar_header.magic, "ustar", 5) != 0) {
+//			error_msg("invalid magic, [%s]\n", raw_tar_header.magic);
+			break;
+		}
+
+		/* Do checksum on headers */
+        for (i =  0; i < 148 ; i++) {
+			sum += temp[i];
+		}
+        sum += ' ' * 8;
+		for (i =  156; i < 512 ; i++) {
+			sum += temp[i];
+		}
+        if (sum != strtol(raw_tar_header.chksum, NULL, 8)) {
+			error_msg("Invalid tar header checksum");
+			break;
+		}
+
+		/* convert to type'ed variables */
+		tar_entry = xcalloc(1, sizeof(file_headers_t));
+		tar_entry->name = xstrdup(raw_tar_header.name);
+
+		tar_entry->offset = (off_t) current_offset;
+		parse_mode(raw_tar_header.mode, &tar_entry->mode);
+		tar_entry->uid   = strtol(raw_tar_header.uid, NULL, 8);
+		tar_entry->gid   = strtol(raw_tar_header.gid, NULL, 8);
+		tar_entry->size  = strtol(raw_tar_header.size, NULL, 8);
+		tar_entry->mtime = strtol(raw_tar_header.mtime, NULL, 8);
+		tar_entry->link_name  = xstrdup(raw_tar_header.linkname);
+//		tar_entry->devmajor  = strtol(rawHeader->devmajor, NULL, 8);
+//		tar_entry->devminor  = strtol(rawHeader->devminor, NULL, 8);
+
+		tar_headers_list = append_archive_list(tar_headers_list, tar_entry);
+
+		/* start of next header is at */
+		next_header_offset = current_offset + tar_entry->size;
+
+		if (tar_entry->size % 512 != 0) {
+			next_header_offset += (512 - tar_entry->size % 512);
+		}
+		/*
+		 * Seek to start of next block, cant use fseek as unzip() does support it
+		 */
+		while (current_offset < next_header_offset) {
+			if (fgetc(tar_stream) == EOF) {
+				break;
+			}
+			current_offset++;
+		}
+	}
+	return(tar_headers_list);
+}
+

libbb/read_text_file_to_buffer.c

@@ -1,38 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "libbb.h"
-
-/*
- * Reads consecutive lines from file line that start with end_string
- * read finishes at an empty line or eof
- */
-extern char *read_text_file_to_buffer(FILE *src_file)
-{
-	char *line = NULL;
-	char *buffer = NULL;
-	int buffer_length = 0;
-	int line_length = 0;
-
-	buffer = xmalloc(1);
-	strcpy(buffer, "");
-
-	/* Loop until line is empty, or just one char, which will be '\n' */
-	do {
-		line = get_line_from_file(src_file);
-		if (line == NULL) {
-			break;
-		}
-		line_length = strlen(line);
-		buffer_length += line_length + 1;
-		buffer = (char *) xrealloc(buffer, buffer_length + 1);
-		strcat(buffer, line);
-		free(line);
-	} while (line_length > 1);
-
-	if (strlen(buffer) == 0) {
-		return(NULL);
-	} else {
-		return(strdup(buffer));
-	}
-}

libbb/untar.c

@@ -1,225 +0,0 @@
-/*
- *  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
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU Library General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * NOTE: This is used by deb_extract to avoid calling the whole tar applet.
- * Its functionality should be merged with tar to avoid duplication
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "libbb.h"
-
-/*
- * stdout can be redircted to FILE *output
- * If const char *file_prefix isnt NULL is prepended to all the extracted filenames.
- * The purpose of const char *argument depends on the value of const int untar_function
- */
-
-extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function,
-	const char *argument, const char *file_prefix)
-{
-	typedef struct raw_tar_header {
-        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 */
-	} raw_tar_header_t;
-
-	raw_tar_header_t raw_tar_header;
-	unsigned char *temp = (unsigned char *) &raw_tar_header;
-	long i;
-	long next_header_offset = 0;
-	long uncompressed_count = 0;
-	size_t size;
-	mode_t mode;
-
-	while (fread((char *) &raw_tar_header, 1, 512, src_tar_file) == 512) {
-		long sum = 0;
-		
-		if (ferror(src_tar_file) || feof(src_tar_file)) {
-			perror_msg("untar: ");
-			break;
-		}
-
-		uncompressed_count += 512;
-
-		/* Check header has valid magic */
-		if (strncmp(raw_tar_header.magic, "ustar", 5) != 0) {
-/*
- * FIXME, Need HELP with this
- *
- * This has to fail silently or it incorrectly reports errors when called from
- * deb_extract.
- * The problem is deb_extract decompresses the .gz file in a child process and
- * untar reads from the child proccess. The child process finishes and exits,
- * but fread reads 0's from the src_tar_file even though the child
- * closed its handle.
- */
-//			error_msg("Invalid tar magic");
-			break;
-		}
-
-		/* Do checksum on headers */
-        for (i =  0; i < 148 ; i++) {
-			sum += temp[i];
-		}
-        sum += ' ' * 8;
-		for (i =  156; i < 512 ; i++) {
-			sum += temp[i];
-		}
-        if (sum != strtol(raw_tar_header.chksum, NULL, 8)) {
-			error_msg("Invalid tar header checksum");
-			break;
-		}
-
-		/* convert to type'ed variables */
-        size = strtol(raw_tar_header.size, NULL, 8);
-		parse_mode(raw_tar_header.mode, &mode);
-
-		/* start of next header is at */
-		next_header_offset = uncompressed_count + size;
-		if (size % 512 != 0) {
-			next_header_offset += (512 - size % 512);
-		}
-
-		/* If an exclude list is specified check current file against list */
-#if 0
-		if (*exclude_list != NULL) {
-			i = 0;
-			while (exclude_list[i] != 0) {
-				if (strncmp(exclude_list[i], raw_tar_header.name, strlen(raw_tar_header.name)) == 0) {
-					break;
-				}
-				i++;
-			}
-		if (exclude_list[i] != 0) {
-				continue;
-			}
-		}
-#endif
-		if (untar_function & (extract_contents | extract_verbose_extract | extract_contents_to_file)) {
-			fprintf(output, "%s\n", raw_tar_header.name);
-		}
-
-		switch (raw_tar_header.typeflag ) {
-			case '0':
-			case '\0': {
-				/* If the name ends in a '/' then assume it is
-				 * supposed to be a directory, and fall through
-				 */
-				int name_length = strlen(raw_tar_header.name);
-				if (raw_tar_header.name[name_length - 1] != '/') {
-					switch (untar_function) {
-						case (extract_extract):
-						case (extract_verbose_extract):
-						case (extract_control): {
-								FILE *dst_file = NULL;
-								char *full_name;
-
-								if (file_prefix != NULL) {
-									full_name = xmalloc(strlen(argument) + strlen(file_prefix) + name_length + 3);
-									sprintf(full_name, "%s/%s.%s", argument, file_prefix, strrchr(raw_tar_header.name, '/') + 1);
-								} else {
-									full_name = concat_path_file(argument, raw_tar_header.name);
-								}
-								dst_file = wfopen(full_name, "w");
-								copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size);
-								uncompressed_count += size;
-								fclose(dst_file);
-								chmod(full_name, mode);
-								free(full_name);
-							}
-							break;
-						case (extract_info):
-							if (strstr(raw_tar_header.name, argument) != NULL) {
-								copy_file_chunk(src_tar_file, stdout, (unsigned long long) size);
-								uncompressed_count += size;
-							}
-							break;
-						case (extract_field):
-							if (strstr(raw_tar_header.name, "./control") != NULL) {
-								return(read_text_file_to_buffer(src_tar_file));
-							}
-							break;
-					}
-					break;
-				}
-			}
-			case '5':
-				if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
-					int ret;
-					char *dir;
-					dir = concat_path_file(argument, raw_tar_header.name);
-					ret = create_path(dir, mode);
-					free(dir);
-					if (ret == FALSE) {
-						perror_msg("%s: Cannot mkdir", raw_tar_header.name); 
-						return NULL;
-					}
-					chmod(dir, mode);
-				}
-				break;
-			case '1':
-				if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
-					if (link(raw_tar_header.linkname, raw_tar_header.name) < 0) {
-						perror_msg("%s: Cannot create hard link to '%s'", raw_tar_header.name, raw_tar_header.linkname); 
-						return NULL;
-					}
-				}
-				break;
-			case '2':
-				if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
-					if (symlink(raw_tar_header.linkname, raw_tar_header.name) < 0) {
-						perror_msg("%s: Cannot create symlink to '%s'", raw_tar_header.name, raw_tar_header.linkname); 
-						return NULL;
-					}
-				}
-				break;
-			case '3':
-			case '4':
-			case '6':
-//				if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
-//					errorFlag=TRUE;
-//				break;
-			default:
-				error_msg("Unknown file type '%c' in tar file", raw_tar_header.typeflag);
-				return NULL;
-		}
-		/*
-		 * Seek to start of next block, cant use fseek as unzip() does support it
-		 */
-		while (uncompressed_count < next_header_offset) {
-			if (fgetc(src_tar_file) == EOF) {
-				break;
-			}
-			uncompressed_count++;
-		}
-	}
-	return NULL;
-}