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main.c
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/*
* DeskLink for *nix (dl)
* Copyright (C) 2004
* Stephen Hurd
*
* Redistribution of modified and unmodified copies
* is premitted provided the copyright remains intact
*/
/*
DeskLink+
2005 John R. Hogerhuis Extensions and enhancements
2019 Brian K. White - repackaging, reorganizing, bootstrap function
2020 Kurt McCullum - TS-DOS loaders
2022 Gabriele Gorla - TS-DOS subdirectories
DeskLink2
2023 Brian K. White - disk image files, pdd1 FDC mode, pdd2 cache & memory
DeskLink2 is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 2 or any
later version as published by the Free Software Foundation.
DeskLink2 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 (in the file "COPYING"); if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111, USA.
*/
#include <termios.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <stdbool.h>
#if defined(__linux__)
#include <utmp.h>
#elif defined(__APPLE__) || defined(__NetBSD__) || defined(OpenBSD)
#include <util.h>
#elif defined(__FreeBSD__)
#include <libutil.h>
#endif
#include "constants.h"
#include "dir_list.h"
#include "xattr.h"
/*** config **************************************************/
#ifndef APP_NAME
#define APP_NAME "DeskLink2"
#endif
#ifndef APP_LIB_DIR
#define APP_LIB_DIR "."
#endif
#ifndef TTY_PREFIX
#define TTY_PREFIX "ttyS"
#endif
#ifndef DEFAULT_BAUD
#define DEFAULT_BAUD 19200
#endif
// default model emulation, 1=pdd1 2=pdd2
// TS-DOS sub-directories requires tpdd1
#ifndef DEFAULT_MODEL
#define DEFAULT_MODEL 1
#endif
// if a loader fails in bootstrap(), try increasing this
#ifndef DEFAULT_BASIC_BYTE_MS
#define DEFAULT_BASIC_BYTE_MS 8
#endif
#define DEFAULT_TPDD1_IMG_SUFFIX ".pdd1"
#define DEFAULT_TPDD2_IMG_SUFFIX ".pdd2"
#ifndef DEFAULT_UPCASE
#define DEFAULT_UPCASE false
#endif
#ifndef DEFAULT_RTSCTS
#define DEFAULT_RTSCTS false
#endif
#ifndef DEFAULT_PROFILE
#define DEFAULT_PROFILE "k85"
#endif
#ifndef DEFAULT_OPERATION_MODE
#define DEFAULT_OPERATION_MODE MODE_OPR
#endif
#ifndef DEFAULT_TILDES
#define DEFAULT_TILDES true
#endif
// To mimic the original Desk-Link from Travelling Software:
#ifndef TSDOS_ROOT_LABEL
#define TSDOS_ROOT_LABEL "0: "
#endif
#ifndef TSDOS_PARENT_LABEL
#define TSDOS_PARENT_LABEL "^ "
#endif
// you can't change this unless you also hack ts-dos
#define TSDOS_DIR_LABEL "<>"
/*
* "magic" files - See ref/ur2.txt
*
* Support for Ultimate ROM II, TSLOAD, & any other on-the-fly loaders.
* These filenames will always be loadable "by magic" in any cd path, even
* if no such filename exists anywhere in the share tree.
*
* Whenever a client tries to request any of these filenames,
* after searching cwd-within-share-path as normal, then search share root, finally app_lib_dir.
* They will always be found in app_lib_dir if nowhere else.
* TODO add $XDG_DATA_HOME (~/.local/share/myapp mac: ~/Library/myapp/)
*
* You may add any other files you want here if you find any other software
* that tries to load-use-discard a file from disk like UR2 uses DOS100.CO.
*
* Files must also be added to install target in Makefile.
*
* This list is checked for a match every time a requested filename is not found,
* so keep it short.
*
* TODO add run-time config list of filenames and search paths
*/
const char * magic_files[] = {
"DOS100.CO",
"DOS200.CO",
"DOSNEC.CO",
"SAR100.CO",
"SAR200.CO",
// The rest of these files don't exist, but we are ready to serve them up if they did exist.
// Some are known to have existed, but no known copies available currently.
// Some may not have ever existed. Most filenames are guesses.
"SARNEC.CO", // Sardine for NEC is known to have existed, with this filename.
"DOSM10.CO", // or DOSOLV.CO ? Jeff Birt found TS-DOS for Olivetti M-10 listed in a catalog.
"DOSK85.CO", // or DOSKYO.CO ? may have never existed
"SARM10.CO", // or SAROLV.CO ? Since TS-DOS for M-10 existed, probably Sardine existed too.
"SARK85.CO" // or SRAKYO.CO ? may have never existed
};
// client compatibility profiles
//
// KC-85
// The platform can use lowercase filenames just fine, but at least both
// TS-DOS and TEENY convert to uppercase in places, so upcase to avoid the battle.
//
// CP/M
// https://www.shaels.net/index.php/cpm80-22-documents/using-cpm/3-file-names
// "The CPM CPP module converts commands into upper case before they are executed
// which leads many to believe that the CPM file system is not case sensitive,
// when in fact the CPM file system is case sensitive. If you use a CPM program
// such as Microsoft Basic you can create file names which contain lower case
// characters. The problem is files which contain lower case characters can not
// be specified as parameters at the CPP command prompt, as the characters will
// be converted to upper case by the CPP before the command is executed."
// So upcase to avoid the battle...
//
// REXCPM native is CP/M, but import & export are limited further to 6.2 upcase.
//
// Cambridge Z88 native is 12.3, not sure what DISCMNGR or DISC_RBL actually does.
//
// Atari ST native is CP/M, later MS-DOS, but PDDOS limits to 6.2
//
// MS-DOS (Atari Portfolio) by rights would be this:
// { "msdos", 8, 3, false, ATTR_RAW, false, false, false },
// except most of the pdd software was only made to work with Floppy/TS-DOS,
// disks so even with an ms-dos client you usually want to use k85 or cpm
//
// Probably no xenix client exists until I port one, but it would be this:
// { "xenix", 14, 0, false, ATTR_RAW, false, false, false }
//
// id, base, ext, pad, attr, dme, magic, upcase
#define CLIENT_PROFILES { \
{ "raw", 0, 0, false, ATTR_RAW, false, false, false }, \
{ "k85", 6, 2, true, ATTR_DEF, true, true, true }, \
{ "wp2", 8, 2, true, ATTR_DEF, false, false, false }, \
{ "cpm", 8, 3, false, ATTR_DEF, false, false, true }, \
{ "rexcpm", 6, 2, true, ATTR_DEF, false, false, true }, \
{ "z88", 12, 3, false, ATTR_DEF, false, false, false }, \
{ "st", 6, 2, true, ATTR_DEF, false, false, true } \
}
// terminal emulation
#define SSO "\033[7m" // set standout
#define RSO "\033[m" // reset standout
#define D8C "\033 F" // disable 8-bit vt control bytes (0x80-0x9F)
// The TPDD1 rom is actually the FB-100 rom.
// The roms in Brother FB-100, knitking FDD19, Purple Computing D103, and
// TANDY 26-3808 (TPDD1) have all been dumped and compared, and are all identical.
// That means the rom came from Brother and is the FB-100 rom in all cases.
// We have this file but it's not used currently.
//#ifndef FB100_ROM
//#define FB100_ROM "Brother_FB-100.rom"
//#endif
// The TPDD2 rom is used because the normal TPDD2 memory access functions
// can read the rom contents the same as any other memory address.
#ifndef TPDD2_ROM
#define TPDD2_ROM "TANDY_26-3814.rom"
#endif
// termios VMIN & VTIME
#define C_CC_VMIN 1
#define C_CC_VTIME 5
/*************************************************************/
int debug = 0;
int operation_mode = DEFAULT_OPERATION_MODE;
bool upcase = DEFAULT_UPCASE;
bool rtscts = DEFAULT_RTSCTS;
bool tildes = DEFAULT_TILDES;
uint8_t model = DEFAULT_MODEL;
uint16_t baud = DEFAULT_BAUD;
int BASIC_byte_us = DEFAULT_BASIC_BYTE_MS*1000;
char client_tty_name[PATH_MAX+1] = {0x00};
char disk_img_fname[PATH_MAX+1] = {0x00};
char app_lib_dir[PATH_MAX+1] = APP_LIB_DIR;
char share_path[2][PATH_MAX+1] = {{0},{0}};
char dme_root_label[7] = TSDOS_ROOT_LABEL;
char dme_parent_label[7] = TSDOS_PARENT_LABEL;
char dme_dir_label[3] = TSDOS_DIR_LABEL;
uint8_t cfnl = TPDD_FILENAME_LEN;
#if !defined(_WIN)
bool getty_mode = false;
#endif
char** args;
int f_open_mode = F_OPEN_NONE;
int client_tty_fd = -1;
int disk_img_fd = -1;
struct termios client_termios;
int o_file_h = -1;
uint8_t gb[TPDD_MSG_MAX];
char iwd[PATH_MAX+1] = {0x00};
char cwd[PATH_MAX+1] = {0x00};
char dme_cwd[7] = TSDOS_ROOT_LABEL;
char bootstrap_fname[PATH_MAX+1] = {0x00};
uint8_t in_dme = 0;
uint8_t bank = 0;
uint8_t ch[2] = {0xFF}; // 0x00 is a valid Operation-mode command, so init to 0xFF
uint8_t rb[SECTOR_LEN] = {0x00}; // pdd1 disk image record buffer
FILE_ENTRY* cur_file;
int dir_depth=0;
uint8_t pdd1_condition = PDD1_COND_NONE; // pdd1 condition bit flags
uint8_t pdd2_condition = PDD2_COND_NONE; // pdd2 condition bit flags
// drive cpu memory map
uint8_t ioport[IOPORT_LEN] = {0x00}; // i/o port
uint8_t cpuram[CPURAM_LEN] = {0x00}; // 128 bytes cpu internal ram
uint8_t ga[GA_LEN] = {0x00}; // gate array interface
uint8_t ram[RAM_LEN] = {0x00}; // 2k ram (pdd2 disk image record buffer)
uint8_t rom[ROM_LEN] = {0x00}; // 4k cpu internal mask rom
// client compatibility settings
#define PROFILE_ID_LEN 8
typedef struct {
char id[PROFILE_ID_LEN+1];
uint8_t base;
uint8_t ext;
bool pad;
uint8_t attr;
bool dme;
bool magic;
bool upcase;
} CLIENT_PROFILE;
const CLIENT_PROFILE profiles [] = CLIENT_PROFILES ;
//const char* profile = profiles[0].id;
char profile[PROFILE_ID_LEN+1] = {0};
uint8_t base_len = 0;
uint8_t ext_len = 0;
char default_attr = ATTR_RAW;
bool enable_magic_files = false;
bool pad_fn = false;
bool dme_en = false;
///////////////////////////////////////////////////////////////////////////////
void show_main_help();
/* primitives and utilities */
// dbg(verbosity_threshold, printf_format, args...)
// dbg(3,"err %02X",err); // means only show this message if debug>=3
void dbg( const int v, const char* format, ... ) {
if (debug<v) return;
va_list args;
va_start( args, format );
vfprintf( stderr, format, args );
fflush(stderr);
va_end( args );
}
// dbg_b(verbosity_threshold, buffer, len)
// dbg_b(3, b, 24); // like dbg() except
// print n bytes of b[] as hex pairs and a trailing newline
// if n<0, then use TPDD_MSG_MAX
void dbg_b(const int v, unsigned char* b, int n) {
if (debug<v) return;
unsigned i;
if (n<0) n = TPDD_MSG_MAX;
for (i=0;i<n;i++) fprintf (stderr,"%02X ",b[i]);
fprintf (stderr, "\n");
fflush(stderr);
}
// like dbg_b, except assume b[] is an Operation-mode req or ret block
// and parse it to display the parts: cmd, len, payload, checksum.
void dbg_p(const int v, unsigned char* b) {
dbg(v,"cmd: %1$02X\nlen: %2$02X (%2$u)\nchk: %3$02X\ndat: ",b[0],b[1],b[b[1]+2]);
dbg_b(v,b+2,b[1]);
}
// ascii-to-bool
// true = case-insensitive: 1 y yes t true on enable
bool atobool (const char* s) {
// min 2 chars to tell "on" from "off"
char t[5] = {0};
t[0]=',';
t[1]=s[0]?tolower(s[0]):' '; // replace the nuls to avoid
t[2]=s[1]?tolower(s[1]):' '; // s="o" -> t=",o" -> matches ",on,"
t[3]=',';
return strstr(",on,1 ,t ,y ,tr,ye,en,",t);
}
// int-to-rate - given int 9600 return macro B9600
speed_t itobaud (uint32_t i) {
return
i==0?B0:
i==50?B50:
i==75?B75:
i==110?B110:
i==134?B134:
i==150?B150:
i==200?B200:
i==300?B300:
i==600?B600:
i==1200?B1200:
i==1800?B1800:
i==2400?B2400:
i==4800?B4800:
i==9600?B9600:
i==19200?B19200:
i==38400?B38400:
#ifdef B57600
i==57600?B57600:
#endif
#ifdef B76800
i==76800?B76800:
#endif
#ifdef B115200
i==115200?B115200:
#endif
#ifdef B153600
i==153600?B153600:
#endif
#ifdef B230400
i==230400?B230400:
#endif
#ifdef B307200
i==307200?B307200:
#endif
#ifdef B460800
i==460800?B460800:
#endif
#ifdef B500000
i==500000?B500000:
#endif
#ifdef B576000
i==576000?B576000:
#endif
#ifdef B614400
i==614400?B614400:
#endif
#ifdef B921600
i==921600?B921600:
#endif
#ifdef B1000000
i==1000000?B1000000:
#endif
#ifdef B1152000
i==1152000?B1152000:
#endif
#ifdef B1500000
i==1500000?B1500000:
#endif
#ifdef B2000000
i==2000000?B2000000:
#endif
#ifdef B2500000
i==2500000?B2500000:
#endif
#ifdef B3000000
i==3000000?B3000000:
#endif
#ifdef B3500000
i==3500000?B3500000:
#endif
#ifdef B4000000
i==4000000?B4000000:
#endif
0;
}
// given int 19200 return 9 (the # in "COM:#8N1ENN")
uint8_t baud_to_stat_code (uint16_t r) {
return
r==75?1:
r==110?2:
r==300?3:
r==600?4:
r==1200?5:
r==2400?6:
r==4800?7:
r==9600?8:
r==19200?9:
0;
}
void lsx (char* path,char* match,char* fmt) {
struct dirent *files;
DIR *dir = opendir(path);
if (!dir){dbg(0,"Cannot open \"%s\"",path); return;}
int i;
while ((files = readdir(dir))) {
for (i=strlen(files->d_name);files->d_name[i]!='.';i--);
if (!strcmp(files->d_name+i+1,match)) dbg(0,fmt,files->d_name);
}
closedir(dir);
}
void show_profiles_help (int e) {
const int n = sizeof(profiles)/sizeof(profiles[0]);
dbg(0,
"\n"
"Help for Client Compatibility Profiles\n"
"\n"
"Usage:\n"
" -c name use profile <name> - (default: \"%1$s\")\n"
" -c #.# \"raw\", truncated but not padded to #.#, attr='%2$c'\n"
" -c #.#p \"raw\", truncated and padded to #.#, attr='%2$c'\n"
" -v -c more help about profiles\n"
,DEFAULT_PROFILE,ATTR_DEF
);
dbg(1,
"\n"
"Profiles taylor the translation between local filenames and TPDD filenames.\n"
"\n"
"A real TPDD doesn't care what's in the filename, and emulating a TPDD\n"
"doesn't require any translation other than truncating to 24 bytes.\n"
"\n"
"But most TPDD clients write filenames to TPDD drives in specific formats,\n"
"and we need to translate filenames between the local and client formats.\n"
"\n"
"Strictly speaking, \"raw\" always works for any and all clients,\n"
"from the clients point of view. It still emulates a real drive exactly.\n"
"\n"
"The only reason for any compatibility profile is for more convenient\n"
"local filenames. When TS-DOS saves a file like \"A.BA\", it actually\n"
"writes \"A .BA\" to a real drive. In \"raw\" mode this would create a\n"
"local file named verbatim: \"A .BA\", which is legal but inconvenient.\n"
"And TS-DOS does not recognize any disk files that don't conform\n"
"to the \"k85\" profile below. (fixed-length, space-padded, 6.2)\n"
"\n"
"\"raw\" still \"works\" because TS-DOS can both create any files it\n"
"wants, and access any files it created, identical to a real drive.\n"
"\n"
"Profiles just make it so that a local file named \"my_long_file_name.text\"\n"
"appears to TS-DOS as \"my_lo~.t~\", which may be ugly but TS-DOS can use it.\n"
"And when TS-DOS tries to read or write a file named \"FOO .CO\",\n"
"we use \"FOO.CO\" for the local filename.\n"
"\n"
"Most of the parameters in a profile also have individual commandline flags,\n"
"and all parameters have individual environment variables.\n"
"Example: \"dl -c k85\" is short for \"dl -c 6.2p -a F -e on\"\n"
"or: \"PROFILE=6.2p ATTR=F DME=on TSLOAD=on UPCASE=on dl\"\n"
"(except k85 is the default so you don't need to use any of those)\n"
"\n"
"The default \"k85\" matches all KC-85-clone platform clients. Examples:\n"
"Floppy, TS-DOS, DSKMGR, TEENY, etc, on TRS-80 Model 100, NEC PC-8201a, etc.\n"
"\n"
"NAME profile name\n"
"BASE basename length\n"
"EXT extension length\n"
"PAD fixed-length space-padded\n"
"ATTR default attribute byte if no xattr\n"
"DME enable TS-DOS directory mode extension\n"
"TSLOAD enable \"magic files\" (ex: DOS100.CO) for TSLOAD / Ultimate ROM II\n"
"UPCASE translate filenames to all uppercase\n"
);
dbg(0,
"\n"
"Available profiles:\n"
"\n"
// "PROFILE\tBASE\tEXT\tPAD\tATTR\tTS-DOS\tMAGIC\tUP\n"
// "NAME\tLEN\tLEN\tFNAMES\tBYTE\tDIRS\tFILES\tCASE\n"
"NAME\tBASE\tEXT\tPAD\tATTR\tDME\tTSLOAD\tUPCASE\n"
"-------------------------------------------------------------\n"
);
for (int i=0; i<n; i++) {
dbg(0,
"%s\t%d\t%d\t%s\t'%c'\t%s\t%s\t%s\n",
profiles[i].id,
profiles[i].base,
profiles[i].ext,
profiles[i].pad?"on":"off",
profiles[i].attr,
profiles[i].dme?"on":"off",
profiles[i].magic?"on":"off",
profiles[i].upcase?"on":"off"
);
}
dbg(0,"\n");
exit(e);
}
void show_diskimage_help(int e) {
dbg(0,
"\n"
"Help for Disk Images\n"
"\n"
"Usage:\n"
" -i filename use disk image file <filename>\n"
" -v -i more help about disk images\n"
"\n"
);
dbg(1,
"If filename is not found, then %1$s is searched.\n"
"\n"
"If the filename ends in \".pdd1\", or the file is the correct exact\n"
"size of a TPDD1 disk image, then dl2 will automatically operate in\n"
"TPDD1 emulation mode, and the same for \".pdd2\" and TPDD2.\n"
"\n"
"If the drive model cannot be determined by either name or size\n"
"(such as a new empty file with an arbitrary name that you want created),\n"
"then use \"-m 1\" or \"-m 2\" to specify tpdd1 or tpdd2.\n"
"\n"
"If filename does not exist, or exists but is zero bytes, then the file\n"
"will be created and filled with a new blank formatted disk image,\n"
"if and when the client issues a format command.\n"
"\n"
"Disk images may be dumped from / restored to physical disks using\n"
"the appropriate model real drive and https://github.com/bkw777/pdd.sh\n"
"\n"
,app_lib_dir
);
dbg(0,
"Available built-in (bundled) disk image files (in %1$s):\n"
"\n"
,app_lib_dir
);
dbg(0,"TPDD1:\n");
lsx(app_lib_dir,"pdd1"," %s\n");
dbg(0,"TPDD2:\n");
lsx(app_lib_dir,"pdd2"," %s\n");
dbg(0,
"\n"
"Examples:\n"
" %1$s -v -i Sardine_American_English.pdd1\n"
" %1$s -v -i ./my_new_disk.pdd2\n"
"\n"
,args[0]);
exit(e);
}
bool ckhelp (const char* s) {
return (
!s[0] ||
!strncasecmp(s,"list",PROFILE_ID_LEN) ||
!strncasecmp(s,"help",PROFILE_ID_LEN) ||
!strncasecmp(s,"?",PROFILE_ID_LEN)
);
}
// set base_len, ext_len, pad_fn from ##.##p
void set_fnames (const char* s) {
if (ckhelp(s)) show_profiles_help(0);
int i, p;
char t[4] = {0};
p = strchr(s,'.')-s;
if (p<1 || p>2) show_profiles_help(1);
for (i=sizeof(s);i>p;i--) {
if (s[i]=='p'||s[i]=='P') pad_fn = true;
if (s[i]>='0' && s[i]<='9') break;
}
memcpy(t,s,p);
i = atoi(t);
if (i>0 && i<TPDD_FILENAME_LEN) base_len = i;
memset(t,0,4);
i = sizeof(s)-p-1;
if (i>4) i = 4;
memcpy(t,s+p+1,i);
i = atoi(t);
if (i>-1 && i<TPDD_FILENAME_LEN-base_len) ext_len = i;
snprintf(profile,PROFILE_ID_LEN+1,"%s",s);
pad_fn = false;
default_attr = ATTR_DEF;
dme_en = false;
enable_magic_files = false;
upcase = false;
return;
}
// client compatibility profile
void load_profile (const char* s) {
const int n = sizeof(profiles)/sizeof(profiles[0]);
int i, p;
if (ckhelp(s)) show_profiles_help(0);
// search for matching profile by name
p = false;
for (i=0; i<n; i++) {
if (!strncasecmp(s,profiles[i].id,PROFILE_ID_LEN)) { p = true ;break; }
}
// If no profile by name, try #.#[p]
// do it after searching by name so that a profile name can have "." in it
if (strchr(s,'.')) { set_fnames(s); return; }
if (!p) {
dbg(0,"No profile named \"%s\" found.\n",s);
show_profiles_help(1);
}
strncpy(profile,profiles[i].id,PROFILE_ID_LEN);
base_len = profiles[i].base;
ext_len = profiles[i].ext;
pad_fn = profiles[i].pad;
default_attr = profiles[i].attr;
dme_en = profiles[i].dme;
enable_magic_files = profiles[i].magic;
upcase = profiles[i].upcase;
}
void update_cwd () {
memset(cwd,0x00,PATH_MAX);
(void)!getcwd(cwd,PATH_MAX);
// if the current directory is not writable, set the write-protected disk flag
uint8_t wp = 0;
if (access(cwd,W_OK|X_OK)) wp = 1;
pdd1_condition |= wp << PDD1_COND_BIT_WPROT;
pdd2_condition |= wp << PDD2_COND_BIT_WPROT;
}
void add_share_path (char* s) {
dbg(3,"%s(%s)\n",__func__,s);
if (!share_path[0][0]) { strcpy(share_path[0],s); return; }
if (!share_path[1][0]) { strcpy(share_path[1],s); return; }
dbg(2,"Discarded excess share path \"%s\"\n",s);
}
void cd_share_path () {
if (!share_path[bank][0]) return;
if (!strncmp(cwd,share_path[bank],PATH_MAX)) return;
if (chdir(share_path[bank])) dbg(0,"FAILED CD TO \"%s\"\n",share_path[bank]);
update_cwd();
}
// find file f either directly or in app_lib_dir
// maybe rewrite f with /path/to/f
void find_lib_file (char* f) {
if (f[0]==0) return;
char t[PATH_MAX+1]={0};
// rewrite ~/foo to $HOME/foo
if (f[0]=='~' && f[1]=='/') {
strcpy(t,f);
memset(f,0,PATH_MAX);
strcpy(f,getenv("HOME"));
strcat(f,t+1);
}
if (f[0]=='/') return; // don't rewrite any absolute path
if (f[0]=='.' && f[1]=='/') return; // don't rewrite explicit relative path
if (f[0]=='.' && f[1]=='.' && f[2]=='/') return; // don't rewrite explicit relative path
if (!access(f,F_OK)) return; // if pathless filename exists & accessible, use it as-is
// none of above matched, look in app_lib_dir
memset(t,0,PATH_MAX);
strcpy(t,app_lib_dir);
strcat(t,"/");
strcat(t,f);
// if found in app_lib_dir then rewrite with that path
if (!access(t,F_OK)) {
memset(f,0,PATH_MAX);
strcpy(f,t);
}
// else leave f[] as it was
//no error as some consumers create the file if not exist
}
// find file f either directly or in app_lib_dir
// examine for tpdd1 vs tpdd2
// set disk_img_fname
int set_disk_img_fname (char* f) {
if (ckhelp(f)) show_diskimage_help(0);
dbg(3,"looking for disk image \"%s\"\n",f);
char t[PATH_MAX+1]={0};
strncpy(t,f,PATH_MAX);
find_lib_file(t);
// t has now possibly been re-written with the path to a bundled file,
// or not, and still may or may not exist
struct stat info;
if (!stat(t, &info) && info.st_size>0) {
// if file exists and >0 bytes
dbg(1,"Loading disk image file \"%s\"\n",t);
// use file size to automatically set model 1 vs 2 or reject file
if (info.st_size==PDD1_IMG_LEN) model = 1;
if (info.st_size==PDD2_IMG_LEN) model = 2;
// user may have explicitly used -m 1 or -m 2
if (model==1 && info.st_size != PDD1_IMG_LEN) {
dbg(0,"%d bytes, expected %u bytes for TPDD1\n",info.st_size,PDD1_IMG_LEN);
return 1;
}
if (model==2 && info.st_size != PDD2_IMG_LEN) {
dbg(0,"%d bytes, expected %u bytes for TPDD2\n",info.st_size,PDD2_IMG_LEN);
return 1;
}
} else {
// if file doesn't exist or is 0 bytes, create it
dbg(1,"Disk image file \"%s\" is empty or does not exist.\nIt will be created if the client issues a format command.\n",t);
// use file name to automatically set model 1 vs 2
// overrides -m if -i came after -m
// ext = dot pddN null
char ext[6] = {0};
strcpy(ext,t+strlen(t)-5);
if (!strcasecmp(ext,DEFAULT_TPDD1_IMG_SUFFIX)) model = 1;
else if (!strcasecmp(ext,DEFAULT_TPDD2_IMG_SUFFIX)) model = 2;
}
memset(disk_img_fname,0,PATH_MAX+1);
// rewrite with leading path if not already
// because we we may cd all over the place
if (t[0]!='/') {
strcpy(disk_img_fname,iwd);
strcat(disk_img_fname,"/");
}
strcat(disk_img_fname,t);
return 0;
}
// search for TTY(s) matching TTY_PREFIX
void find_ttys (char* f) {
dbg(3,"%s(%s)\n",__func__,f);
// open /dev
char path[] = "/dev/";
DIR* dir = opendir(path);
if (!dir){dbg(0,"Cannot open \"%s\"\n",path); return;}
// read /dev, look for all files beginning with prefix
// add any matches to ttys[]
char** ttys = malloc(sizeof(char*));
struct dirent *files;
uint16_t nttys = 0, l=strlen(f);
#if defined(__FreeBSD__)
char* p;
#endif
dbg(2,"Searching for \"%s%s*\"\n",path,f);
while ((files = readdir(dir))) {
if (strncmp(files->d_name,f,l)) continue;
#if defined(__FreeBSD__)
p = strrchr(files->d_name,'.');
if (p!=NULL) if (!strcmp(p,".init") || !strcmp(p,".lock")) continue;
#endif
nttys++;
ttys = realloc(ttys, (nttys+1) * sizeof(char(*)));
ttys[nttys] = files->d_name;
}
closedir(dir);
int i=0;
if (nttys==1) i=1; // if there is only one element in ttys[], use it
if (nttys>1) while (!i) { // if more than 1 then menu
dbg(0,"\n");
for (i=1;i<=nttys;i++) dbg(0,"%d) %s\n",i,ttys[i]);
i=0; char a[6]={0};
dbg(0,"Which serial port is the TPDD client on (1-%d or q) ? ",nttys);
if (fgets(a,sizeof(a),stdin)) i=atoi(a);
if (i<1 || i>nttys) i=0;
dbg(0,"\n");
if (a[0]=='q'||a[0]=='Q') break;
}
// set client_tty_name[] with the final result
client_tty_name[0]=0x00;
if (i) {
strcpy(client_tty_name,path);
strcat(client_tty_name,ttys[i]);
}
free(ttys);
}
// take the user-supplied tty arg and figure out the actual /dev/ttyfoo
void resolve_client_tty_name () {
dbg(3,"%s()\n",__func__);
switch (client_tty_name[0]) {
case 0x00:
// nothing supplied, scan for any ttys matching the default prefix
find_ttys(TTY_PREFIX);
break;
case '-':
// stdin/stdout mode, silence all messages - untested
debug = -1;
strcpy (client_tty_name,"/dev/tty");
client_tty_fd=1;
break;
default:
// something given, try with and without prepending /dev/
if (!access(client_tty_name,F_OK)) break;
char t[PATH_MAX+1]={0x00};
int i = 0;
strcpy(t,client_tty_name);
strcpy(client_tty_name,"/dev/");
if (!strncmp(client_tty_name,t,5)) i=5;
strcat(client_tty_name,t+i);
}
}
// set termios VMIN & VTIME
void client_tty_vmt(int m,int t) {
if (m<-1 || t<-1) tcgetattr(client_tty_fd,&client_termios);
if (m<0) m = C_CC_VMIN;
if (t<0) t = C_CC_VTIME;
if (client_termios.c_cc[VMIN] == m && client_termios.c_cc[VTIME] == t) return;
client_termios.c_cc[VMIN] = m;
client_termios.c_cc[VTIME] = t;
tcsetattr(client_tty_fd,TCSANOW,&client_termios);
}
int open_client_tty () {
dbg(3,"%s()\n",__func__);
if (!client_tty_name[0]) {
show_main_help();
dbg(0,"Error: No serial device specified\n(searched: /dev/%s*)\n",TTY_PREFIX);
return 1;
}
dbg(0,"Opening \"%s\" ... ",client_tty_name);
// open with O_NONBLOCK to avoid hang if client not ready, then unset later.
if (client_tty_fd<0) client_tty_fd=open((char *)client_tty_name,O_RDWR|O_NOCTTY|O_NONBLOCK);
if (client_tty_fd<0) { dbg(0,"%s\n",strerror(errno)); return 1; }
dbg(0,"OK\n");
#ifdef TIOCEXCL
ioctl(client_tty_fd,TIOCEXCL);
#endif
#if !defined(_WIN)
if (getty_mode) {
debug = -1;
if (!login_tty(client_tty_fd)) client_tty_fd = STDIN_FILENO;
else (void)!daemon(1,1);
}
#endif
(void)!tcflush(client_tty_fd, TCIOFLUSH);
// unset O_NONBLOCK
fcntl(client_tty_fd, F_SETFL, fcntl(client_tty_fd, F_GETFL, NULL) & ~O_NONBLOCK);
if (tcgetattr(client_tty_fd,&client_termios)==-1) return 21;
cfmakeraw(&client_termios);
client_termios.c_cflag |= CLOCAL|CS8;
if (rtscts) client_termios.c_cflag |= CRTSCTS;
else client_termios.c_cflag &= ~CRTSCTS;
if (cfsetspeed(&client_termios,itobaud(baud))==-1) return 22;
if (tcsetattr(client_tty_fd,TCSANOW,&client_termios)==-1) return 23;
client_tty_vmt(-2,-2);
return 0;
}
int write_client_tty(void* b, int n) {
dbg(4,"%s(%u)\n",__func__,n);
n = write(client_tty_fd,b,n);
dbg(3,"SENT: "); dbg_b(3,b,n);
return n;
}
// It is correct that this blocks and waits forever.
// The one time we don't want to block, we don't use this.
int read_client_tty(void* b, const unsigned int n) {
dbg(4,"%s(%u)\n",__func__,n);
unsigned t = 0;
int i = 0;
while (t<n) if ((i = read(client_tty_fd, b+t, n-t))) t+=i;
if (i<0) {
dbg(0,"error: %s\n",strerror(errno));
exit(EXIT_FAILURE);
}
dbg(3,"RCVD: "); dbg_b(3,b,n);
return t;
}
// cat a file to terminal, for custom loader directions in bootstrap()
void dcat(char* f) {
char b[4097]={0x00};
int h=open(f,O_RDONLY);
if (h<0) return;
while (read(h,&b,4096)>0) dbg(0,"%s",b);
close(h);
}
/*
* The manual says:
*
* "The checksum is the one's complement of the least significant byte
* of the number of bytes from the block format through the data block."
*
* But the bytes are summed, not just counted!
* Replace "number of" with "sum of the".
*
* Sum all the bytes in the specified range.
* Take the least significant byte of that sum.
* Invert all the bits in that byte.
*
* b[0] = cmd (block format)
* b[1] = len
* b[2] to b[1+len] = 0 to 128 bytes of payload (data block)
* ignore everything after b[1+len]
*/
uint8_t checksum(unsigned char* b) {
uint16_t s=0; uint8_t i, l=2+b[1];
for (i=0;i<l;i++) s+=b[i];
return ~(s&0xFF);
}