From 881b0c4774639c704859aac7db43175698c03708 Mon Sep 17 00:00:00 2001 From: patrick Date: Wed, 8 Feb 2023 16:40:20 +0100 Subject: [PATCH] Version 0.1 --- COPYING | 674 +++++++++++++++++++++++++++++++++++++++++++++++++++ NEWS | 46 ++++ README.md | 4 - src/Makefile | 9 + src/isoupd.c | 397 ++++++++++++++++++++++++++++++ 5 files changed, 1126 insertions(+), 4 deletions(-) create mode 100644 COPYING create mode 100644 NEWS create mode 100644 src/Makefile create mode 100644 src/isoupd.c diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..61429a2 --- /dev/null +++ b/NEWS @@ -0,0 +1,46 @@ +ECOLE du Logiciel Libre d'Ivry - https://e2li.org + +Petit utilitaire qui permet de mettre a jour un fichier contenant une image ISO. + +Evolution des versions : + +06/02/23 - Version 0.1 : +======================== + * Validation des structures pour lire les secteurs du fichier image. + * Vérification des options. + * La commande -l (--list) fonctionne. + + Quelques exemples : +$ isoupd debian-live-11.6.0-amd64-gnome+nonfree.iso + - BOOT 4 + - DISTS 5 + - D_I 3 + - EFI 3 + - FIRMWARE 8 + - ISOLINUX 8 + - LIVE 4 + - POOL 4 + - _DISK 5 +$ isoupd debian-live-11.6.0-amd64-gnome+nonfree.iso -d firmware + - AMD64_MICROCODE_3_20191218_.DEB 31 + - ARM_TRUSTED_FIRMWARE_TOOLS_.DEB 31 + - ATMEL_FIRMWARE_1_3_4_1_ALL.DEB 30 + - BLUEZ_FIRMWARE_1_2_4_ALL.DEB 28 + - DAHDI_FIRMWARE_NONFREE_2_11.DEB 31 + - DNS323_FIRMWARE_TOOLS_0_7_3.DEB 31 + - FIRMWARE_AMD_GRAPHICS_20210.DEB 31 + - FIRMWARE_ATH9K_HTC_1_4_0_10.DEB 31 + - FIRMWARE_ATHEROS_20210315_3.DEB 31 + - FIRMWARE_BNX2X_20210315_3_A.DEB 31 +$ isoupd --help +isoupd version 0.1 (c) E2L 2023 +Utilisation : isoupd [options] isofile + -l, --list liste d'un repertoire (defaut) + -p, --put modifie un fichier de l'iso + -g, --get extrait un fichier de l'iso + -v, --verbose mode verbeux, avec trace de la recherche + -f, --file chemin du fichier dans l'iso + -h, --host nom du fichier host. Obligatoire pour -p et -g + -d, --dir nom du repertoire a lister dans l'iso + --help cette aide ! + diff --git a/README.md b/README.md index 43e773e..6f3cf74 100644 --- a/README.md +++ b/README.md @@ -20,7 +20,3 @@ https://www.iso.org/fr/iso-9660-images-for-computer-files.html et bien d'autres ! -06/02/23 - Version 0.1 : - * Validation des structures pour lire les secteurs du fichier image. - * Vérification des options. - * La commande -l (--list) fonctionne. diff --git a/src/Makefile b/src/Makefile new file mode 100644 index 0000000..a8dba01 --- /dev/null +++ b/src/Makefile @@ -0,0 +1,9 @@ +# Makefile pour Linux + +isoupd : isoupd.c + cc -o isoupd isoupd.c + +clean : + rm -f isoupd + + diff --git a/src/isoupd.c b/src/isoupd.c new file mode 100644 index 0000000..bee99f1 --- /dev/null +++ b/src/isoupd.c @@ -0,0 +1,397 @@ +/* Copyright (C) 2022-2023 Patrick H. E. Foubet - e2li.org + Ecole du Logiciel Libre d'Ivry - FRANCE + +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 3 of the License, or 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, see +*******************************************************************/ +#include +#include +#include +#include +#include +#include +#include +#include + +#define VERSION "0.1" +typedef uint32_t loc_t; +typedef uint8_t byte; +#define CD_SECTOR_SIZE 0x800 +#define ISO_PADSIZE 0x10 + +#ifndef __cplusplus +typedef uint8_t bool; +#define true (uint8_t)1 +#define false (uint8_t)0 +#endif + +#define ALIGN(x,y) (((x) + ((y)-1)) & (~((y)-1))) + +static char *isofilename, *targetfilename, *targetdirname, *hostfilename; +static bool length_override = false; + +struct iso_directory_t { + uint8_t len; + uint8_t ex_len; + uint32_t lba; + uint32_t big_lba; + uint32_t file_len; + uint32_t big_file_len; + byte time_date[7]; + byte file_flags; + byte file_unit_size; + byte interleave_gap_size; + uint16_t volseq_num; + uint16_t big_volseq_num; + uint8_t fileid_len; + char fileid[0]; +} __attribute__((packed)); +typedef struct iso_directory_t iso_directory_t; + +int getfilesize(FILE *f) { + int spos = ftell(f); + fseek(f, 0, SEEK_END); + int len = ftell(f); + fseek(f, spos, SEEK_SET); + return len; +} +static int verbose_flag; +static int mode_flag=-2; /* 0=list, 1=put, -1=get */ + +void CdSetloc(FILE *f, loc_t newpos) { + fseeko(f, newpos * CD_SECTOR_SIZE, SEEK_SET); +} + +void CdRead(void *buf, loc_t nsectors, FILE *f) { + fread(buf, nsectors, CD_SECTOR_SIZE, f); +} + +void CdWrite(void *buf, loc_t nsectors, FILE *f) { + fwrite(buf, nsectors, CD_SECTOR_SIZE, f); +} + +bool ispvd(byte *sec) { + return( + (sec[0] == 1) && + (memcmp(sec+1, "CD001", 5) == 0) + ); +} + +bool streq(const char *s1, const char *s2) { + return (strcasecmp(s1,s2) == 0); +} + +bool scmplen(const char *s1, const char *s2, int len) { + for(int i = 0; i < len; i += 1) { + if(tolower(s1[i]) != tolower(s2[i])) { + return false; + } + } + return true; +} + +loc_t CdTell(FILE *isofile) { + loc_t s = ftell(isofile); + return (s & (~(0x7FF))) / 0x800; +} + +bool CdFindFileInDir(iso_directory_t *out_dir, FILE* isofile, const char *filename, int filename_len, loc_t *out_secnum, loc_t *out_offset) { + byte sec[CD_SECTOR_SIZE]; + iso_directory_t *dir = (iso_directory_t*)(sec); + int slen = filename_len; + int dirp = 0; + + CdRead(sec, 1, isofile); + + if (verbose_flag) printf("FFID %s %d\n", filename, slen); + + while(dir->len != 0) { + int dlen = dir->fileid_len; + if(!(dir->file_flags & 2)) { + dlen -= 2; + } + if ((mode_flag == 0) && ((strcmp(filename,"*")==0)||(strcmp(filename,"/*")==0))) { + if (dlen>0) { + dir->fileid[dlen] = '\0'; + if ((dlen==1) && (dir->fileid[0] <= ' ')) { + if (verbose_flag) printf(" + 0x%x %d\n",(int)dir->fileid[0], dlen); + } else printf(" - %s %d\n",dir->fileid, dlen); + } + } else { + if(dlen == slen) { + if (verbose_flag) printf(" + %s\n",dir->fileid); + if(scmplen(dir->fileid, filename, slen) == true) { + *out_dir = *dir; + if(NULL != out_secnum) { + *out_secnum = CdTell(isofile) - 1; + } + if(NULL != out_offset) { + *out_offset = dirp; + } + return true; + } + } + } + dirp += dir->len; + if(dirp >= 0x800) { + CdRead(sec, 1, isofile); + dirp = dirp % 0x800; + } + dir = (iso_directory_t*)(sec + dirp); + } + return false; +} + +bool CdFindFile(iso_directory_t *outdir, FILE *isofile, const char *filename, loc_t *out_secnum, loc_t *out_offset) +{ + const char *next; + const char *cur = filename; + int slen; + if (verbose_flag) printf("> %s\n",filename); + do { + next = strchr(cur, '/'); + if(next == NULL) { + slen = strlen(cur); + } else { + slen = (int)(next - cur); + } + if(false == CdFindFileInDir(outdir, isofile, cur, slen, out_secnum, out_offset)) { + return false; + } + if(next != NULL) { + CdSetloc(isofile, outdir->lba); + next++; cur = next; + } else break; + } while(next != NULL); + return true; +} + +/* options definitions */ +static int help_flag; +static struct option long_options[] = { + {"verbose", no_argument, &verbose_flag, 1}, + {"help", no_argument, &help_flag, 1}, + {"list", no_argument, 0, 'l'}, + {"put", no_argument, 0, 'p'}, + {"get", no_argument, 0, 'g'}, + {"host", required_argument, 0, 'h'}, + {"file", required_argument, 0, 'f'}, + {"dir", required_argument, 0, 'd'}, + {0, 0, 0, 0} +}; + +void explain(void) +{ + puts("Utilisation : isoupd [options] isofile"); + puts(" -l, --list liste d'un repertoire (defaut)"); + puts(" -p, --put modifie un fichier de l'iso"); + puts(" -g, --get extrait un fichier de l'iso"); + puts(" -v, --verbose mode verbeux, avec trace de la recherche"); + puts(" -f, --file chemin du fichier dans l'iso"); + puts(" -h, --host nom du fichier host. Obligatoire pour -p et -g"); + puts(" -d, --dir nom du repertoire a lister dans l'iso"); +} +void messerr(char * m, int err) +{ + fprintf(stderr,"ERREUR : %s !!\n", m); + if (err) { + explain(); + exit(err); + } +} +static int mode_contrad=0; +void errmode(char * o) +{ + fprintf(stderr,"Option %s en contradiction avec une autre !\n",o); + mode_contrad=1; +} + +int main(int N, char *P[]) +{ +int c, l, opt_ind = 0; +FILE *hostfile, *isofile; +char etoile[2] = "*"; + + if(sizeof(iso_directory_t) != 33) { + fprintf(stderr, "Bad Install %lu\n", sizeof(iso_directory_t)); + return 9; + } + while (1) { + if ((c=getopt_long(N,P,"vlpgd:h:f:",long_options,&opt_ind))==-1) break; + switch (c) { + case 0: + if (long_options[opt_ind].flag != 0) break; + printf ("option %s", long_options[opt_ind].name); + if (optarg) printf (" avec arg %s", optarg); + printf ("\n"); + break; + + case 'l': + if (mode_flag != -2) errmode(P[opt_ind]); + mode_flag=0; + break; + case 'p': + if (mode_flag != -2) errmode(P[opt_ind]); + mode_flag=1; + break; + case 'g': + if (mode_flag != -2) errmode(P[opt_ind]); + mode_flag=-1; + break; + case 'v': + verbose_flag=1; + break; + case 'h': + hostfilename = optarg; + break; + case 'f': + targetfilename = optarg; + break; + case 'd': + l = strlen(optarg); + if (optarg[l-1]=='/') { l--; optarg[l]='\0'; } + targetdirname = (char*) malloc(l+3); + if (targetdirname == NULL) { perror("malloc"); return 4; } + sprintf(targetdirname, "%s/%s", optarg,etoile); + break; + case '?': /* getopt_long already printed an error message. */ + explain(); + return 1; + default: + abort (); + } + } + if (help_flag) { + printf("isoupd version %s (c) E2L 2023\n",VERSION); + explain(); + return 0; + } + if (optind < N) { + isofilename = P[optind++]; + if (optind < N) { + fprintf (stderr, "Non pris en compte : "); + while (optind < N) fprintf (stderr, "%s ", P[optind++]); + fprintf(stderr, "\n"); + messerr("parametre(s) inutile(s)",3); + } + } + /* verifications */ + if (! isofilename) messerr("Fichier ISO absent",2); + if (mode_flag == -2) mode_flag = 0; /* defaut */ + switch(mode_flag) { + case 0 : /* list */ + if (targetfilename) messerr("option -f inutile",2); + if (hostfilename) messerr("option -h inutile",2); + if (!targetdirname) targetdirname = etoile; + if (verbose_flag) printf("Liste de %s dans %s\n",targetdirname,isofilename); + targetfilename = targetdirname; + break; + case 1 : /* put */ + if (targetdirname) messerr("option -d inutile",2); + if (!targetfilename) messerr("Chemin du fichier dans l'ISO absent",2); + if (!hostfilename) messerr("fichier host source absent",2); + if (verbose_flag) printf("PUT de %s vers %s dans %s\n",hostfilename,targetfilename,isofilename); + break; + case -1 : /* get */ + if (targetdirname) messerr("option -d inutile",2); + if (!targetfilename) messerr("Chemin du fichier dans l'ISO absent",2); + if (!hostfilename) messerr("fichier host destination absent",2); + if (verbose_flag) printf("GET de %s dans %s vers %s\n",targetfilename,isofilename,hostfilename); + break; + } + if (verbose_flag) printf("Verbose : mode = %d\n",mode_flag); + + if ((isofile = fopen(isofilename, "r+")) == NULL) { + fprintf(stderr, "Erreur ouverture ISO %s\n", isofilename); + return 1; + } + if(hostfilename != NULL) { + if ((hostfile = fopen(hostfilename, "r")) == NULL) { + fprintf(stderr, "Erreur ouverture fichier %s\n", hostfilename); + return 1; + } + } + byte sec[CD_SECTOR_SIZE]; + iso_directory_t *dir = (iso_directory_t*)(sec); + CdSetloc(isofile, ISO_PADSIZE); + CdRead(sec, 1, isofile); + if(ispvd(sec) == false) { + fprintf(stderr, "%s n'est pas un fichier ISO\n", isofilename); + return 1; + } + loc_t root_lba = *(loc_t*)(sec+158); + if (verbose_flag) printf("root lba = %x\n", root_lba); + CdSetloc(isofile, root_lba); + loc_t dir_lba, dir_offset; + bool s = CdFindFile(dir, isofile, targetfilename, &dir_lba, &dir_offset); + if (!mode_flag) { /* list */ + fclose(isofile); + return 0; + } + if(false == s) { + fprintf(stderr, "Fichier %s absent de l'ISO %s\n", targetfilename, isofilename); + return 1; + } + CdSetloc(isofile, dir_lba); + CdRead(sec, 1, isofile); + dir = (iso_directory_t*)(sec + dir_offset); + printf("File size on ISO is %d\n", dir->file_len); + int maxsize = ALIGN(dir->file_len, 0x800); + int len = getfilesize(hostfile); + int aligned_len = ALIGN(len, 0x800); + printf("File size on HOST is %d\n", len); + return 0; /* test */ + if(false == length_override) { + if(len > maxsize) { + fprintf(stderr, "Le fichier %s depasse de %d octets (%d > %d)\n", + hostfilename, + len - maxsize, + len, maxsize + ); + fclose(hostfile); + fclose(isofile); + return 1; + } + if((uint32_t)len != dir->file_len) { + if((uint32_t)aligned_len < dir->file_len) { + printf("ATTENTION: La mise en place de ce fichier va retrecir l'espace d'allocation disponible !\n"); + printf(" (il sera de %d octets)\n", aligned_len); + } + printf("Les tailles sont differentes mais compatibles. Modification ? [o/N]\n"); + int ch = getchar(); + if((ch != 'o') && (ch != 'O')) { + printf("Annulation !!\n"); + return 1; + } + } + } + byte *filedata = (byte*)(malloc(aligned_len)); + memset(filedata, 0, aligned_len); + fread(filedata, 1, len, hostfile); + fclose(hostfile); + + printf("Ecriture de %d octets sur le secteur %u\n", len, dir->lba); + CdSetloc(isofile, dir->lba); + CdWrite(filedata, (aligned_len / CD_SECTOR_SIZE), isofile); + + dir->file_len = len; + printf("Ecriture d'un nouveau repertoire sur %u\n", dir_lba); + CdSetloc(isofile, dir_lba); + CdWrite(sec, 1, isofile); + + printf("OK !\n"); + + fclose(isofile); + return 0; +} +