home *** CD-ROM | disk | FTP | other *** search
- /*
- * File isodump.c - dump iso9660 directory information.
- *
-
- Written by Eric Youngdale (1993).
-
- Copyright 1993 Yggdrasil Computing, Incorporated
-
- 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, 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 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- static char rcsid[] ="$Id: isodump.c,v 1.2 1997/02/23 19:11:24 eric Rel $";
-
- #include "../config.h"
-
- #include <stdio.h>
- #ifdef HAVE_TERMIOS_H
- #include <termios.h>
- #include <sys/ioctl.h>
- #else
- #include <termio.h>
- #endif
- #include <signal.h>
-
- FILE * infile;
- int file_addr;
- unsigned char buffer[2048];
- unsigned char search[64];
- int blocksize;
-
- #define PAGE sizeof(buffer)
-
- #define ISODCL(from, to) (to - from + 1)
-
-
- int
- isonum_731 (char * p)
- {
- return ((p[0] & 0xff)
- | ((p[1] & 0xff) << 8)
- | ((p[2] & 0xff) << 16)
- | ((p[3] & 0xff) << 24));
- }
-
- int
- isonum_721 (char * p)
- {
- return ((p[0] & 0xff) | ((p[1] & 0xff) << 8));
- }
-
- int
- isonum_723 (char * p)
- {
- #if 0
- if (p[0] != p[3] || p[1] != p[2]) {
- fprintf (stderr, "invalid format 7.2.3 number\n");
- exit (1);
- }
- #endif
- return (isonum_721 (p));
- }
-
-
- int
- isonum_733 (unsigned char * p)
- {
- return (isonum_731 (p));
- }
-
- struct iso_primary_descriptor {
- unsigned char type [ISODCL ( 1, 1)]; /* 711 */
- unsigned char id [ISODCL ( 2, 6)];
- unsigned char version [ISODCL ( 7, 7)]; /* 711 */
- unsigned char unused1 [ISODCL ( 8, 8)];
- unsigned char system_id [ISODCL ( 9, 40)]; /* aunsigned chars */
- unsigned char volume_id [ISODCL ( 41, 72)]; /* dunsigned chars */
- unsigned char unused2 [ISODCL ( 73, 80)];
- unsigned char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
- unsigned char unused3 [ISODCL ( 89, 120)];
- unsigned char volume_set_size [ISODCL (121, 124)]; /* 723 */
- unsigned char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
- unsigned char logical_block_size [ISODCL (129, 132)]; /* 723 */
- unsigned char path_table_size [ISODCL (133, 140)]; /* 733 */
- unsigned char type_l_path_table [ISODCL (141, 144)]; /* 731 */
- unsigned char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
- unsigned char type_m_path_table [ISODCL (149, 152)]; /* 732 */
- unsigned char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
- unsigned char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
- unsigned char volume_set_id [ISODCL (191, 318)]; /* dunsigned chars */
- unsigned char publisher_id [ISODCL (319, 446)]; /* achars */
- unsigned char preparer_id [ISODCL (447, 574)]; /* achars */
- unsigned char application_id [ISODCL (575, 702)]; /* achars */
- unsigned char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
- unsigned char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
- unsigned char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
- unsigned char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
- unsigned char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
- unsigned char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
- unsigned char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
- unsigned char file_structure_version [ISODCL (882, 882)]; /* 711 */
- unsigned char unused4 [ISODCL (883, 883)];
- unsigned char application_data [ISODCL (884, 1395)];
- unsigned char unused5 [ISODCL (1396, 2048)];
- };
-
- struct iso_directory_record {
- unsigned char length [ISODCL (1, 1)]; /* 711 */
- unsigned char ext_attr_length [ISODCL (2, 2)]; /* 711 */
- unsigned char extent [ISODCL (3, 10)]; /* 733 */
- unsigned char size [ISODCL (11, 18)]; /* 733 */
- unsigned char date [ISODCL (19, 25)]; /* 7 by 711 */
- unsigned char flags [ISODCL (26, 26)];
- unsigned char file_unit_size [ISODCL (27, 27)]; /* 711 */
- unsigned char interleave [ISODCL (28, 28)]; /* 711 */
- unsigned char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
- unsigned char name_len [ISODCL (33, 33)]; /* 711 */
- unsigned char name [1];
- };
-
- #ifdef HAVE_TERMIOS_H
- struct termios savetty;
- struct termios newtty;
- #else
- struct termio savetty;
- struct termio newtty;
- #endif
-
- reset_tty(){
- #ifdef HAVE_TERMIOS_H
- if(tcsetattr(0, TCSANOW, &savetty) == -1)
- #else
- if(ioctl(0, TCSETAF, &savetty)==-1)
- #endif
- {
- printf("cannot put tty into normal mode\n");
- exit(1);
- }
- }
-
- set_tty(){
- #ifdef HAVE_TERMIOS_H
- if(tcsetattr(0, TCSANOW, &newtty) == -1)
- #else
- if(ioctl(0, TCSETAF, &newtty)==-1)
- #endif
- {
- printf("cannot put tty into raw mode\n");
- exit(1);
- }
- }
-
- /* Come here when we get a suspend signal from the terminal */
-
- void
- onsusp (int signo)
- {
- /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */
- signal(SIGTTOU, SIG_IGN);
- reset_tty ();
- fflush (stdout);
- signal(SIGTTOU, SIG_DFL);
- /* Send the TSTP signal to suspend our process group */
- signal(SIGTSTP, SIG_DFL);
- /* sigsetmask(0);*/
- kill (0, SIGTSTP);
- /* Pause for station break */
-
- /* We're back */
- signal (SIGTSTP, onsusp);
- set_tty ();
- }
-
-
-
- crsr2(int row, int col){
- printf("\033[%d;%dH",row,col);
- }
-
- int parse_rr(unsigned char * pnt, int len, int cont_flag)
- {
- int slen;
- int ncount;
- int extent;
- int cont_extent, cont_offset, cont_size;
- int flag1, flag2;
- unsigned char *pnts;
- char symlink[1024];
- char name[1024];
- int goof;
- /* printf(" RRlen=%d ", len); */
-
- symlink[0] = 0;
-
- cont_extent = cont_offset = cont_size = 0;
-
- ncount = 0;
- flag1 = flag2 = 0;
- while(len >= 4){
- if(ncount) printf(",");
- else printf("[");
- printf("%c%c", pnt[0], pnt[1]);
- if(pnt[3] != 1) {
- printf("**BAD RRVERSION");
- return;
- };
- ncount++;
- if(pnt[0] == 'R' && pnt[1] == 'R') flag1 = pnt[4] & 0xff;
- if(strncmp(pnt, "PX", 2) == 0) flag2 |= 1;
- if(strncmp(pnt, "PN", 2) == 0) flag2 |= 2;
- if(strncmp(pnt, "SL", 2) == 0) flag2 |= 4;
- if(strncmp(pnt, "NM", 2) == 0) {
- slen = pnt[2] - 5;
- pnts = pnt+5;
- if( (pnt[4] & 6) != 0 )
- {
- printf("*");
- }
- memset(name, 0, sizeof(name));
- memcpy(name, pnts, slen);
- printf("=%s", name);
- flag2 |= 8;
- }
- if(strncmp(pnt, "CL", 2) == 0) flag2 |= 16;
- if(strncmp(pnt, "PL", 2) == 0) flag2 |= 32;
- if(strncmp(pnt, "RE", 2) == 0) flag2 |= 64;
- if(strncmp(pnt, "TF", 2) == 0) flag2 |= 128;
-
- if(strncmp(pnt, "PX", 2) == 0) {
- extent = isonum_733(pnt+12);
- printf("=%x", extent);
- };
-
- if(strncmp(pnt, "CE", 2) == 0) {
- cont_extent = isonum_733(pnt+4);
- cont_offset = isonum_733(pnt+12);
- cont_size = isonum_733(pnt+20);
- printf("=[%x,%x,%d]", cont_extent, cont_offset,
- cont_size);
- };
-
- if(strncmp(pnt, "PL", 2) == 0 || strncmp(pnt, "CL", 2) == 0) {
- extent = isonum_733(pnt+4);
- printf("=%x", extent);
- };
-
- if(strncmp(pnt, "SL", 2) == 0) {
- int cflag;
-
- cflag = pnt[4];
- pnts = pnt+5;
- slen = pnt[2] - 5;
- while(slen >= 1){
- switch(pnts[0] & 0xfe){
- case 0:
- strncat(symlink, pnts+2, pnts[1]);
- break;
- case 2:
- strcat (symlink, ".");
- break;
- case 4:
- strcat (symlink, "..");
- break;
- case 8:
- if((pnts[0] & 1) == 0)strcat (symlink, "/");
- break;
- case 16:
- strcat(symlink,"/mnt");
- printf("Warning - mount point requested");
- break;
- case 32:
- strcat(symlink,"kafka");
- printf("Warning - host_name requested");
- break;
- default:
- printf("Reserved bit setting in symlink", goof++);
- break;
- };
- if((pnts[0] & 0xfe) && pnts[1] != 0) {
- printf("Incorrect length in symlink component");
- };
- if((pnts[0] & 1) == 0) strcat(symlink,"/");
-
- slen -= (pnts[1] + 2);
- pnts += (pnts[1] + 2);
-
- };
- if(cflag) strcat(symlink, "+");
- printf("=%s", symlink);
- symlink[0] = 0;
- };
-
- len -= pnt[2];
- pnt += pnt[2];
- if(len <= 3 && cont_extent) {
- unsigned char sector[2048];
- lseek(fileno(infile), cont_extent * blocksize, 0);
- read(fileno(infile), sector, sizeof(sector));
- flag2 |= parse_rr(§or[cont_offset], cont_size, 1);
- };
- };
- if(ncount) printf("]");
- if (!cont_flag && flag1 != flag2)
- printf("Flag %x != %x", flag1, flag2, goof++);
- return flag2;
- }
-
- int
- dump_rr(struct iso_directory_record * idr)
- {
- int len;
- unsigned char * pnt;
-
- len = idr->length[0] & 0xff;
- len -= sizeof(struct iso_directory_record);
- len += sizeof(idr->name);
- len -= idr->name_len[0];
- pnt = (unsigned char *) idr;
- pnt += sizeof(struct iso_directory_record);
- pnt -= sizeof(idr->name);
- pnt += idr->name_len[0];
- if((idr->name_len[0] & 1) == 0){
- pnt++;
- len--;
- };
- parse_rr(pnt, len, 0);
- }
-
-
- showblock(int flag){
- unsigned int k;
- int i, j;
- int line;
- struct iso_directory_record * idr;
- lseek(fileno(infile), file_addr, 0);
- read(fileno(infile), buffer, sizeof(buffer));
- for(i=0;i<60;i++) printf("\n");
- fflush(stdout);
- i = line = 0;
- if(flag) {
- while(1==1){
- crsr2(line+3,1);
- idr = (struct iso_directory_record *) &buffer[i];
- if(idr->length[0] == 0) break;
- printf("%3d ", idr->length[0]);
- printf("[%2d] ", idr->volume_sequence_number[0]);
- printf("%5x ", isonum_733(idr->extent));
- printf("%8d ", isonum_733(idr->size));
- printf ((idr->flags[0] & 2) ? "*" : " ");
- if(idr->name_len[0] == 1 && idr->name[0] == 0)
- printf(". ");
- else if(idr->name_len[0] == 1 && idr->name[0] == 1)
- printf(".. ");
- else {
- for(j=0; j<idr->name_len[0]; j++) printf("%c", idr->name[j]);
- for(j=0; j<14 -idr->name_len[0]; j++) printf(" ");
- };
- dump_rr(idr);
- printf("\n");
- i += buffer[i];
- if (i > 2048 - sizeof(struct iso_directory_record)) break;
- line++;
- };
- };
- printf("\n");
- printf(" Zone, zone offset: %6x %4.4x ",file_addr / blocksize,
- file_addr & (blocksize - 1));
- fflush(stdout);
- }
-
- getbyte()
- {
- char c1;
- c1 = buffer[file_addr & (blocksize-1)];
- file_addr++;
- if ((file_addr & (blocksize-1)) == 0) showblock(0);
- return c1;
- }
-
- main(int argc, char * argv[]){
- char c;
- char buffer[2048];
- int nbyte;
- int i,j;
- struct iso_primary_descriptor ipd;
- struct iso_directory_record * idr;
-
- if(argc < 2) return 0;
- infile = fopen(argv[1],"rb");
-
- file_addr = 16 << 11;
- lseek(fileno(infile), file_addr, 0);
- read(fileno(infile), &ipd, sizeof(ipd));
-
- idr = (struct iso_directory_record *) &ipd.root_directory_record;
-
- blocksize = isonum_723(ipd.logical_block_size);
- if( blocksize != 512 && blocksize != 1024 && blocksize != 2048 )
- {
- blocksize = 2048;
- }
-
- file_addr = isonum_733(idr->extent);
-
- file_addr = file_addr * blocksize;
-
- /* Now setup the keyboard for single character input. */
- #ifdef HAVE_TERMIOS_H
- if(tcgetattr(0, &savetty) == -1)
- #else
- if(ioctl(0, TCGETA, &savetty) == -1)
- #endif
- {
- printf("stdin must be a tty\n");
- exit(1);
- }
- newtty=savetty;
- newtty.c_lflag&=~ICANON;
- newtty.c_lflag&=~ECHO;
- newtty.c_cc[VMIN]=1;
- set_tty();
- signal(SIGTSTP, onsusp);
-
- do{
- if(file_addr < 0) file_addr = 0;
- showblock(1);
- read (0, &c, 1);
- if (c == 'a') file_addr -= blocksize;
- if (c == 'b') file_addr += blocksize;
- if (c == 'g') {
- crsr2(20,1);
- printf("Enter new starting block (in hex):");
- scanf("%x",&file_addr);
- file_addr = file_addr * blocksize;
- crsr2(20,1);
- printf(" ");
- };
- if (c == 'f') {
- crsr2(20,1);
- printf("Enter new search string:");
- fgets(search,sizeof(search),stdin);
- while(search[strlen(search)-1] == '\n') search[strlen(search)-1] = 0;
- crsr2(20,1);
- printf(" ");
- };
- if (c == '+') {
- while(1==1){
- while(1==1){
- c = getbyte(&file_addr);
- if (c == search[0]) break;
- };
- for (j=1;j<strlen(search);j++)
- if(search[j] != getbyte()) break;
- if(j==strlen(search)) break;
- };
- file_addr &= ~(blocksize-1);
- showblock(1);
- };
- if (c == 'q') break;
- } while(1==1);
- reset_tty();
- fclose(infile);
- }
-
-
-
-
-