* Copyright (C) 2000 by Glenn McGrath
* Written by Glenn McGrath <bug1@netconnect.com.au> 1 June 2000
*
- * Modified 8 August 2000 by Glenn McGrath
- * - now uses getopt
- * - moved copySubFile function to utilities.c
- * - creates linked list of all headers
- * - easily accessable to other busybox functions
- *
* Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
*
* This program is free software; you can redistribute it and/or modify
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * Last modified 25 August 2000
+ * Last modified 9 September 2000
*/
#include <stdio.h>
+#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include <utime.h>
+#include <unistd.h>
+#include <stdlib.h>
#include <sys/types.h>
+#include <sys/stat.h>
+#include <malloc.h>
#include "internal.h"
#define BLOCK_SIZE 60
#define EXT_TO_FILE 8 /* extract contents of archive */
#define EXT_TO_STDOUT 16 /* extract to stdout */
-#define BB_DECLARE_EXTERN
-#define bb_need_io_error
-#include "messages.c"
+#define MAX_NAME_LENGTH 100
+
+//#define BB_DECLARE_EXTERN
+//#define bb_need_io_error
+//#include "messages.c"
-typedef struct rawArHeader { /* Byte Offset */
+typedef struct rawArHeader { /* Byte Offset */
char name[16]; /* 0-15 */
char date[12]; /* 16-27 */
char uid[6], gid[6]; /* 28-39 */
} rawArHeader_t;
typedef struct headerL {
- char name[16];
+ char name[MAX_NAME_LENGTH];
size_t size;
uid_t uid;
gid_t gid;
} headerL_t;
/*
- * populate linked list with all ar file entries and offset
+ * identify Ar header (magic) and set srcFd to first header entry
*/
-static int parseArArchive(int srcFd, headerL_t *current)
+static int checkArMagic(int srcFd)
{
- off_t lastOffset=0, thisOffset=0;
- char arVersion[8];
- rawArHeader_t rawArHeader;
-
- lseek(srcFd, 0, SEEK_SET);
- if (fullRead(srcFd, arVersion, 8) <= 0) {
- errorMsg("Invalid header magic\n");
+ char arMagic[8];
+ if (fullRead(srcFd, arMagic, 8) != 8)
return (FALSE);
- }
- if (strncmp(arVersion,"!<arch>",7) != 0) {
- errorMsg("This doesnt appear to be an ar archive\n");
+
+ if (strncmp(arMagic,"!<arch>",7) != 0)
return(FALSE);
- }
- while (fullRead(srcFd, (char *) &rawArHeader, 60) == 60) {
- if ( (rawArHeader.fmag[0] == '`') &&
- (rawArHeader.fmag[1] == '\n')) {
- sscanf(rawArHeader.name, "%s", current->name);
- parse_mode(rawArHeader.mode, ¤t->mode);
- current->mtime = atoi(rawArHeader.date);
- current->uid = atoi(rawArHeader.uid);
- current->gid = atoi(rawArHeader.gid);
- current->size = (size_t) atoi(rawArHeader.size);
- current->offset = lseek(srcFd, 0 , SEEK_CUR);
- current->next = (headerL_t *) xmalloc(sizeof(headerL_t));
- lastOffset = lseek(srcFd, (off_t) current->size, SEEK_CUR);
- current = current->next;
- }
- else { /* GNU ar has an extra char after data */
- thisOffset=lseek(srcFd, 0, SEEK_CUR);
- if ( (thisOffset - lastOffset) > ((off_t) 61) )
- return(FALSE);
- lseek(srcFd, thisOffset - 59, SEEK_SET);
- }
- }
- return(FALSE);
+ return(TRUE);
+}
+
+/*
+ * read, convert and check the raw ar header
+ * srcFd should be pointing to the start of header prior to entry
+ * srcFd will be pointing at the start of data after successful exit
+ * if returns FALSE srcFd is reset to initial position
+ */
+static int readRawArHeader(int srcFd, headerL_t *header)
+{
+ rawArHeader_t rawArHeader;
+ off_t initialOffset;
+ size_t nameLength;
+
+ initialOffset = lseek(srcFd, 0, SEEK_CUR);
+ if (fullRead(srcFd, (char *) &rawArHeader, 60) != 60) {
+ lseek(srcFd, initialOffset, SEEK_SET);
+ return(FALSE);
+ }
+ if ((rawArHeader.fmag[0]!='`') || (rawArHeader.fmag[1]!='\n')) {
+ lseek(srcFd, initialOffset, SEEK_SET);
+ return(FALSE);
+ }
+
+ strncpy(header->name, rawArHeader.name, 16);
+ nameLength=strcspn(header->name, " \\");
+ header->name[nameLength]='\0';
+ parse_mode(rawArHeader.mode, &header->mode);
+ header->mtime = atoi(rawArHeader.date);
+ header->uid = atoi(rawArHeader.uid);
+ header->gid = atoi(rawArHeader.gid);
+ header->size = (size_t) atoi(rawArHeader.size);
+ header->offset = initialOffset + (off_t) 60;
+ return(TRUE);
+}
+
+/*
+ * get, check and correct the converted header
+ */
+static int readArEntry(int srcFd, headerL_t *newEntry)
+{
+ size_t nameLength;
+
+ if(readRawArHeader(srcFd, newEntry)==FALSE)
+ return(FALSE);
+
+ nameLength = strcspn(newEntry->name, "/");
+
+ /* handle GNU style short filenames, strip trailing '/' */
+ if (nameLength > 0)
+ newEntry->name[nameLength]='\0';
+
+ /* handle GNU style long filenames */
+ if (nameLength == 0) {
+ /* escape from recursive call */
+ if (newEntry->name[1]=='0')
+ return(TRUE);
+
+ /* the data section contains the real filename */
+ if (newEntry->name[1]=='/') {
+ char tempName[MAX_NAME_LENGTH];
+
+ if (newEntry->size > MAX_NAME_LENGTH)
+ newEntry->size = MAX_NAME_LENGTH;
+ fullRead(srcFd, tempName, newEntry->size);
+ tempName[newEntry->size-3]='\0';
+
+ /* read the second header for this entry */
+ /* be carefull, this is recursive */
+ if (readArEntry(srcFd, newEntry)==FALSE)
+ return(FALSE);
+
+ if ((newEntry->name[0]='/') && (newEntry->name[1]='0'))
+ strcpy(newEntry->name, tempName);
+ else {
+ errorMsg("Invalid long filename\n");
+ return(FALSE);
+ }
+ }
+ }
+ return(TRUE);
}
/*
* return the headerL_t struct for the specified filename
*/
-static headerL_t *getSubFileHeader(int srcFd, const char filename[16])
+static headerL_t *getHeaders(int srcFd, headerL_t *head)
{
- headerL_t *list;
- list = xmalloc(sizeof(headerL_t));
-
- parseArArchive(srcFd, list);
- while (list->next != NULL) {
- if (strncmp(list->name, filename, strlen(filename))==0)
- return(list);
- list=list->next;
- }
- return(NULL);
+ int arEntry=FALSE;
+ headerL_t *list;
+ list = (headerL_t *) malloc(sizeof(headerL_t));
+
+ if (checkArMagic(srcFd)==TRUE)
+ arEntry=TRUE;
+ else
+ errorMsg("isnt an ar archive\n");
+
+ if (arEntry==TRUE) {
+ while(readArEntry(srcFd, list) == TRUE) {
+ list->next = (headerL_t *) malloc(sizeof(headerL_t));
+ *list->next = *head;
+ *head = *list;
+
+ /* recursive check for sub-archives */
+ lseek(srcFd, list->size, SEEK_CUR);
+/* printf("checking for sub headers\n");
+ if ((subList = getHeaders(srcFd, list->next)) != NULL) {
+ printf("found a sub archive !\n");
+ }
+ else
+ printf("didnt find a sub header\n"); */
+ }
+ }
+
+ return(head);
}
/*
- * populate linked list with all ar file entries and offset
+ * find an entry in the linked list matching the filename
*/
-static int displayEntry(int srcFd, const char filename[16], int funct)
+static headerL_t *findEntry(headerL_t *head, const char *filename)
{
- headerL_t *file;
+ while(head->next != NULL) {
+ if (strcmp(filename, head->name)==0)
+ return(head);
+ head=head->next;
+ }
+ return(NULL);
+}
- if ((file = getSubFileHeader(srcFd, filename)) == NULL)
- return(FALSE);
+/*
+ * populate linked list with all ar file entries and offset
+ */
+static int displayEntry(headerL_t *head, int funct)
+{
if ((funct & VERBOSE) == VERBOSE) {
- printf("%s %d/%d %8d %s ", modeString(file->mode), file->uid, file->gid, file->size, timeString(file->mtime));
+ printf("%s %d/%d %8d %s ", modeString(head->mode), head->uid, head->gid, head->size, timeString(head->mtime));
}
- printf("%s\n", file->name);
+ printf("%s\n", head->name);
+ head = head->next;
return(TRUE);
}
-static int extractAr(int srcFd, int dstFd, const char filename[16])
+static int extractAr(int srcFd, int dstFd, headerL_t *file)
{
- headerL_t *file;
-
- if ( (file = getSubFileHeader(srcFd, filename)) == NULL)
- return(FALSE);
lseek(srcFd, file->offset, SEEK_SET);
if (copySubFile(srcFd, dstFd, (size_t) file->size) == TRUE)
return(TRUE);
{
int funct = 0, opt=0;
int srcFd=0, dstFd=0;
-
+ headerL_t *header, *entry, *extractList;
+
while ((opt = getopt(argc, argv, "ovt:p:x:")) != -1) {
switch (opt) {
case 'o':
funct = funct | EXT_TO_STDOUT;
}
/* following is common to 't','x' and 'p' */
- if (optarg == NULL) {
- printf("expected a filename\n");
- return(FALSE);
- }
if ( (srcFd = open(optarg, O_RDONLY)) < 0) {
errorMsg("Cannot read %s\n", optarg);
return (FALSE);
return(FALSE);
}
- /* find files to extract */
- if (optind<argc)
- for(; optind < argc; optind++) {
- if ( (funct & EXT_TO_FILE) == EXT_TO_FILE) {
- dstFd = open(argv[optind], O_WRONLY | O_CREAT);
- extractAr(srcFd, dstFd, argv[optind]);
+ entry = (headerL_t *) malloc(sizeof(headerL_t));
+ header = (headerL_t *) malloc(sizeof(headerL_t));
+ extractList = (headerL_t *) malloc(sizeof(headerL_t));
+
+ header = getHeaders(srcFd, header);
+
+ /* find files to extract or display */
+ if (optind<argc) {
+ /* only handle specified files */
+ while(optind < argc) {
+ if ( (entry = findEntry(header, argv[optind])) != NULL) {
+ entry->next = (headerL_t *) malloc(sizeof(headerL_t));
+ *entry->next = *extractList;
+ *extractList = *entry;
}
- if ( (funct & EXT_TO_STDOUT) == EXT_TO_STDOUT)
- extractAr(srcFd, fileno(stdout), argv[optind]);
- if ( (funct & DISPLAY) == DISPLAY)
- displayEntry(srcFd, argv[optind], funct);
+ optind++;
+ }
+ }
+ else
+ /* extract everything */
+ extractList = header;
+
+ while(extractList->next != NULL) {
+ if ( (funct & EXT_TO_FILE) == EXT_TO_FILE) {
+ dstFd = open(extractList->name, O_WRONLY | O_CREAT);
+ extractAr(srcFd, dstFd, extractList);
}
+ if ( (funct & EXT_TO_STDOUT) == EXT_TO_STDOUT)
+ extractAr(srcFd, fileno(stdout), extractList);
+ if ( (funct & DISPLAY) == DISPLAY)
+ displayEntry(extractList, funct);
+ extractList=extractList->next;
+ }
return (TRUE);
}
* Copyright (C) 2000 by Glenn McGrath
* Written by Glenn McGrath <bug1@netconnect.com.au> 1 June 2000
*
- * Modified 8 August 2000 by Glenn McGrath
- * - now uses getopt
- * - moved copySubFile function to utilities.c
- * - creates linked list of all headers
- * - easily accessable to other busybox functions
- *
* Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
*
* This program is free software; you can redistribute it and/or modify
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * Last modified 25 August 2000
+ * Last modified 9 September 2000
*/
#include <stdio.h>
+#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include <utime.h>
+#include <unistd.h>
+#include <stdlib.h>
#include <sys/types.h>
+#include <sys/stat.h>
+#include <malloc.h>
#include "internal.h"
#define BLOCK_SIZE 60
#define EXT_TO_FILE 8 /* extract contents of archive */
#define EXT_TO_STDOUT 16 /* extract to stdout */
-#define BB_DECLARE_EXTERN
-#define bb_need_io_error
-#include "messages.c"
+#define MAX_NAME_LENGTH 100
+
+//#define BB_DECLARE_EXTERN
+//#define bb_need_io_error
+//#include "messages.c"
-typedef struct rawArHeader { /* Byte Offset */
+typedef struct rawArHeader { /* Byte Offset */
char name[16]; /* 0-15 */
char date[12]; /* 16-27 */
char uid[6], gid[6]; /* 28-39 */
} rawArHeader_t;
typedef struct headerL {
- char name[16];
+ char name[MAX_NAME_LENGTH];
size_t size;
uid_t uid;
gid_t gid;
} headerL_t;
/*
- * populate linked list with all ar file entries and offset
+ * identify Ar header (magic) and set srcFd to first header entry
*/
-static int parseArArchive(int srcFd, headerL_t *current)
+static int checkArMagic(int srcFd)
{
- off_t lastOffset=0, thisOffset=0;
- char arVersion[8];
- rawArHeader_t rawArHeader;
-
- lseek(srcFd, 0, SEEK_SET);
- if (fullRead(srcFd, arVersion, 8) <= 0) {
- errorMsg("Invalid header magic\n");
+ char arMagic[8];
+ if (fullRead(srcFd, arMagic, 8) != 8)
return (FALSE);
- }
- if (strncmp(arVersion,"!<arch>",7) != 0) {
- errorMsg("This doesnt appear to be an ar archive\n");
+
+ if (strncmp(arMagic,"!<arch>",7) != 0)
return(FALSE);
- }
- while (fullRead(srcFd, (char *) &rawArHeader, 60) == 60) {
- if ( (rawArHeader.fmag[0] == '`') &&
- (rawArHeader.fmag[1] == '\n')) {
- sscanf(rawArHeader.name, "%s", current->name);
- parse_mode(rawArHeader.mode, ¤t->mode);
- current->mtime = atoi(rawArHeader.date);
- current->uid = atoi(rawArHeader.uid);
- current->gid = atoi(rawArHeader.gid);
- current->size = (size_t) atoi(rawArHeader.size);
- current->offset = lseek(srcFd, 0 , SEEK_CUR);
- current->next = (headerL_t *) xmalloc(sizeof(headerL_t));
- lastOffset = lseek(srcFd, (off_t) current->size, SEEK_CUR);
- current = current->next;
- }
- else { /* GNU ar has an extra char after data */
- thisOffset=lseek(srcFd, 0, SEEK_CUR);
- if ( (thisOffset - lastOffset) > ((off_t) 61) )
- return(FALSE);
- lseek(srcFd, thisOffset - 59, SEEK_SET);
- }
- }
- return(FALSE);
+ return(TRUE);
+}
+
+/*
+ * read, convert and check the raw ar header
+ * srcFd should be pointing to the start of header prior to entry
+ * srcFd will be pointing at the start of data after successful exit
+ * if returns FALSE srcFd is reset to initial position
+ */
+static int readRawArHeader(int srcFd, headerL_t *header)
+{
+ rawArHeader_t rawArHeader;
+ off_t initialOffset;
+ size_t nameLength;
+
+ initialOffset = lseek(srcFd, 0, SEEK_CUR);
+ if (fullRead(srcFd, (char *) &rawArHeader, 60) != 60) {
+ lseek(srcFd, initialOffset, SEEK_SET);
+ return(FALSE);
+ }
+ if ((rawArHeader.fmag[0]!='`') || (rawArHeader.fmag[1]!='\n')) {
+ lseek(srcFd, initialOffset, SEEK_SET);
+ return(FALSE);
+ }
+
+ strncpy(header->name, rawArHeader.name, 16);
+ nameLength=strcspn(header->name, " \\");
+ header->name[nameLength]='\0';
+ parse_mode(rawArHeader.mode, &header->mode);
+ header->mtime = atoi(rawArHeader.date);
+ header->uid = atoi(rawArHeader.uid);
+ header->gid = atoi(rawArHeader.gid);
+ header->size = (size_t) atoi(rawArHeader.size);
+ header->offset = initialOffset + (off_t) 60;
+ return(TRUE);
+}
+
+/*
+ * get, check and correct the converted header
+ */
+static int readArEntry(int srcFd, headerL_t *newEntry)
+{
+ size_t nameLength;
+
+ if(readRawArHeader(srcFd, newEntry)==FALSE)
+ return(FALSE);
+
+ nameLength = strcspn(newEntry->name, "/");
+
+ /* handle GNU style short filenames, strip trailing '/' */
+ if (nameLength > 0)
+ newEntry->name[nameLength]='\0';
+
+ /* handle GNU style long filenames */
+ if (nameLength == 0) {
+ /* escape from recursive call */
+ if (newEntry->name[1]=='0')
+ return(TRUE);
+
+ /* the data section contains the real filename */
+ if (newEntry->name[1]=='/') {
+ char tempName[MAX_NAME_LENGTH];
+
+ if (newEntry->size > MAX_NAME_LENGTH)
+ newEntry->size = MAX_NAME_LENGTH;
+ fullRead(srcFd, tempName, newEntry->size);
+ tempName[newEntry->size-3]='\0';
+
+ /* read the second header for this entry */
+ /* be carefull, this is recursive */
+ if (readArEntry(srcFd, newEntry)==FALSE)
+ return(FALSE);
+
+ if ((newEntry->name[0]='/') && (newEntry->name[1]='0'))
+ strcpy(newEntry->name, tempName);
+ else {
+ errorMsg("Invalid long filename\n");
+ return(FALSE);
+ }
+ }
+ }
+ return(TRUE);
}
/*
* return the headerL_t struct for the specified filename
*/
-static headerL_t *getSubFileHeader(int srcFd, const char filename[16])
+static headerL_t *getHeaders(int srcFd, headerL_t *head)
{
- headerL_t *list;
- list = xmalloc(sizeof(headerL_t));
-
- parseArArchive(srcFd, list);
- while (list->next != NULL) {
- if (strncmp(list->name, filename, strlen(filename))==0)
- return(list);
- list=list->next;
- }
- return(NULL);
+ int arEntry=FALSE;
+ headerL_t *list;
+ list = (headerL_t *) malloc(sizeof(headerL_t));
+
+ if (checkArMagic(srcFd)==TRUE)
+ arEntry=TRUE;
+ else
+ errorMsg("isnt an ar archive\n");
+
+ if (arEntry==TRUE) {
+ while(readArEntry(srcFd, list) == TRUE) {
+ list->next = (headerL_t *) malloc(sizeof(headerL_t));
+ *list->next = *head;
+ *head = *list;
+
+ /* recursive check for sub-archives */
+ lseek(srcFd, list->size, SEEK_CUR);
+/* printf("checking for sub headers\n");
+ if ((subList = getHeaders(srcFd, list->next)) != NULL) {
+ printf("found a sub archive !\n");
+ }
+ else
+ printf("didnt find a sub header\n"); */
+ }
+ }
+
+ return(head);
}
/*
- * populate linked list with all ar file entries and offset
+ * find an entry in the linked list matching the filename
*/
-static int displayEntry(int srcFd, const char filename[16], int funct)
+static headerL_t *findEntry(headerL_t *head, const char *filename)
{
- headerL_t *file;
+ while(head->next != NULL) {
+ if (strcmp(filename, head->name)==0)
+ return(head);
+ head=head->next;
+ }
+ return(NULL);
+}
- if ((file = getSubFileHeader(srcFd, filename)) == NULL)
- return(FALSE);
+/*
+ * populate linked list with all ar file entries and offset
+ */
+static int displayEntry(headerL_t *head, int funct)
+{
if ((funct & VERBOSE) == VERBOSE) {
- printf("%s %d/%d %8d %s ", modeString(file->mode), file->uid, file->gid, file->size, timeString(file->mtime));
+ printf("%s %d/%d %8d %s ", modeString(head->mode), head->uid, head->gid, head->size, timeString(head->mtime));
}
- printf("%s\n", file->name);
+ printf("%s\n", head->name);
+ head = head->next;
return(TRUE);
}
-static int extractAr(int srcFd, int dstFd, const char filename[16])
+static int extractAr(int srcFd, int dstFd, headerL_t *file)
{
- headerL_t *file;
-
- if ( (file = getSubFileHeader(srcFd, filename)) == NULL)
- return(FALSE);
lseek(srcFd, file->offset, SEEK_SET);
if (copySubFile(srcFd, dstFd, (size_t) file->size) == TRUE)
return(TRUE);
{
int funct = 0, opt=0;
int srcFd=0, dstFd=0;
-
+ headerL_t *header, *entry, *extractList;
+
while ((opt = getopt(argc, argv, "ovt:p:x:")) != -1) {
switch (opt) {
case 'o':
funct = funct | EXT_TO_STDOUT;
}
/* following is common to 't','x' and 'p' */
- if (optarg == NULL) {
- printf("expected a filename\n");
- return(FALSE);
- }
if ( (srcFd = open(optarg, O_RDONLY)) < 0) {
errorMsg("Cannot read %s\n", optarg);
return (FALSE);
return(FALSE);
}
- /* find files to extract */
- if (optind<argc)
- for(; optind < argc; optind++) {
- if ( (funct & EXT_TO_FILE) == EXT_TO_FILE) {
- dstFd = open(argv[optind], O_WRONLY | O_CREAT);
- extractAr(srcFd, dstFd, argv[optind]);
+ entry = (headerL_t *) malloc(sizeof(headerL_t));
+ header = (headerL_t *) malloc(sizeof(headerL_t));
+ extractList = (headerL_t *) malloc(sizeof(headerL_t));
+
+ header = getHeaders(srcFd, header);
+
+ /* find files to extract or display */
+ if (optind<argc) {
+ /* only handle specified files */
+ while(optind < argc) {
+ if ( (entry = findEntry(header, argv[optind])) != NULL) {
+ entry->next = (headerL_t *) malloc(sizeof(headerL_t));
+ *entry->next = *extractList;
+ *extractList = *entry;
}
- if ( (funct & EXT_TO_STDOUT) == EXT_TO_STDOUT)
- extractAr(srcFd, fileno(stdout), argv[optind]);
- if ( (funct & DISPLAY) == DISPLAY)
- displayEntry(srcFd, argv[optind], funct);
+ optind++;
+ }
+ }
+ else
+ /* extract everything */
+ extractList = header;
+
+ while(extractList->next != NULL) {
+ if ( (funct & EXT_TO_FILE) == EXT_TO_FILE) {
+ dstFd = open(extractList->name, O_WRONLY | O_CREAT);
+ extractAr(srcFd, dstFd, extractList);
}
+ if ( (funct & EXT_TO_STDOUT) == EXT_TO_STDOUT)
+ extractAr(srcFd, fileno(stdout), extractList);
+ if ( (funct & DISPLAY) == DISPLAY)
+ displayEntry(extractList, funct);
+ extractList=extractList->next;
+ }
return (TRUE);
}
projects / platform / upstream / busybox.git / commitdiff