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GEMini_Atari_CD-ROM_Walnut_Creek_December_1993.iso
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mint
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mint095s
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main.c
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C/C++ Source or Header
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1993-08-03
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/*
Copyright 1990,1991,1992 Eric R. Smith. All rights reserved.
*/
#include "mint.h"
#include "version.h"
#include "cookie.h"
#include "xbra.h"
/* the kernel's stack size */
#define STACK 8*1024L
/* if the user is holding down the magic shift key, we ask before booting */
#define MAGIC_SHIFT 0x1 /* right shift */
static void xbra_install P_((xbra_vec *, long, void (*)()));
static void init_intr P_((void));
static void getmch P_((void));
static void do_line P_((char *));
static void shutmedown P_((PROC *));
void shutdown P_((void));
static void doset P_((char *,char *));
static long mint_criticerr P_((long));
static int gem_active; /* 0 if AES has started, 1 otherwise */
static int check_for_gem P_((void));
static void run_auto_prgs P_((void));
#ifdef LATTICE
/*
* AGK: this is witchcraft to completely replace the startup code for
* Lattice; doing so saves around 10K on the final binary and pulls only
* long division & multitplication from the library (and not even those
* if you compile for native '030). The drawback of this code is it
* passes no environment or command line whatsoever. Since I always
* set MiNT options & environment in 'mint.cnf' this is not a personal
* downer, however at some point in the future we ought to have a kernel
* parseargs() like call which sets these things up.
*/
BASEPAGE *_base;
static void
start(BASEPAGE *bp)
{
long shrinklen;
_base = bp;
shrinklen = bp->p_tlen + bp->p_dlen + bp->p_blen + STACK + 0x100;
if (bp->p_lowtpa + shrinklen <= bp->p_hitpa) {
static char null[1] = {""};
static char *argv[2] = {null, NULL};
extern __builtin_putreg P_((int, long)); /* totally bogus */
__builtin_putreg(15, bp->p_lowtpa + shrinklen);
Mshrink((void *)bp->p_lowtpa, shrinklen);
main(1, argv, argv);
}
Pterm(ENSMEM);
}
#endif
#ifdef __GNUC__
long _stksize = STACK;
#include <minimal.h>
#endif
int curs_off = 0; /* set if we should turn the cursor off when exiting */
int mint_errno = 0; /* error return from open and creat filesystem calls */
/*
* AGK: for proper co-processors we must consider saving their context.
* This variable when non-zero indicates that the BIOS considers a true
* coprocessor to be present. We use this variable in the context switch
* code to decide whether to attempt an FPU context save.
*/
short fpu = 0;
/*
* "mch" holds what kind of machine we are running on
*/
long mch = 0;
/*
* variable holds processor type
*/
long mcpu = 0;
/*
* variable set to 1 iff on a 68010 (used by the context switch code)
* this is redundant with mcpu, but is kept for reasons of speed
*/
short m68010 = 0;
/*
* variable set if someone has already installed an flk cookie
*/
int flk = 0;
/* program to run at startup */
char orig_init[] = "init.prg";
char *init_prg = orig_init;
char init_tail[128];
/* initial environment for that program */
char *init_env = 0;
/* temporary pointer into that environment for setenv */
char *env_ptr;
/* length of the environment */
long env_len;
/* flag that's set if we want pseudo-drives to have BIOS entries:
* 0 means no BIOS interaction with pseudo-drives at all
* 1 means the drives show up in _drvbits and Drvmap()
* 2 means the above + fake handlers for Rwabs, Mediach, etc.
*/
int pseudodrives = 2;
/* GEMDOS pointer to current basepage */
BASEPAGE **tosbp;
/* pointer to the BIOS keyboard shift variable */
extern char *kbshft; /* see bios.c */
/* version of TOS we're running over */
int tosvers;
/* structures for keyboard/MIDI interrupt vectors */
KBDVEC *syskey, oldkey;
xbra_vec old_ikbd; /* old ikbd vector */
/* values the user sees for the DOS, BIOS, and XBIOS vectors */
long save_dos, save_bios, save_xbios;
/* values for original system vectors */
xbra_vec old_dos, old_bios, old_xbios, old_timer, old_vbl, old_5ms;
xbra_vec old_criticerr;
long old_term;
xbra_vec old_resvec; /* old reset vector */
long old_resval; /* old reset validation */
#ifdef EXCEPTION_SIGS
/* bus error, address error, illegal instruction, etc. vectors */
xbra_vec old_bus, old_addr, old_ill, old_divzero, old_trace, old_priv;
#endif
/* BIOS disk vectors */
xbra_vec old_mediach, old_getbpb, old_rwabs;
/* BIOS drive map */
long olddrvs;
extern Func bios_tab[], dos_tab[];
/* kernel info that is passed to loaded file systems and device drivers */
struct kerinfo kernelinfo = {
MAJ_VERSION, MIN_VERSION,
DEFAULT_MODE, 0,
bios_tab, dos_tab,
changedrv,
TRACE, DEBUG, ALERT, FATAL,
kmalloc, kfree, umalloc, ufree,
strnicmp, stricmp, strlwr, strupr, ksprintf,
ms_time, unixtim, dostim,
nap, sleep, wake, wakeselect,
denyshare, denylock
};
/* temporary stack for resets -- see intr.s */
char tmpstack[256];
/* TOS and MiNT cookie jars, respectively. See the comments and code
* after main() for further details
*/
COOKIE *oldcookie, *newcookie;
/*
* install a new vector for address "addr", using the XBRA protocol.
* must run in supervisor mode!
*/
static void
xbra_install(xv, addr, func)
xbra_vec *xv;
long addr;
void (*func)();
{
xv->xbra_magic = XBRA_MAGIC;
xv->xbra_id = MINT_MAGIC;
xv->jump = JMP_OPCODE;
xv->this = func;
xv->next = *((struct xbra **)addr);
*((short **)addr) = &xv->jump;
}
/*
* MiNT critical error handler; all it does is to jump through
* the vector for the current process
*/
static long
mint_criticerr(error)
long error; /* high word is error, low is drive */
{
return (*curproc->criticerr)(error);
}
/* initialize all interrupt vectors and new trap routines
* we also get here any TOS variables that we're going to change
* (e.g. the pointer to the cookie jar) so that rest_intr can
* restore them.
*/
static void
init_intr()
{
extern void mint_bios(), mint_dos(), mint_timer(), mint_vbl();
extern void mint_5ms(); /* AKP */
extern void mint_xbios(), reset();
extern void new_ikbd();
extern void new_bus(), new_addr(), new_ill(), new_divzero(),
new_trace(), new_priv();
short savesr;
syskey = (KBDVEC *)Kbdvbase();
oldkey = *syskey;
xbra_install(&old_ikbd, (long)(&syskey->ikbdsys), new_ikbd);
/* gratuitous (void *) for Lattice */
old_term = (long)Setexc(0x102, (void *)-1L);
savesr = spl7();
xbra_install(&old_dos, 0x84L, mint_dos);
save_dos = (long)old_dos.next;
xbra_install(&old_bios, 0xb4L, mint_bios);
save_bios = (long)old_bios.next;
xbra_install(&old_xbios, 0xb8L, mint_xbios);
save_xbios = (long)old_xbios.next;
xbra_install(&old_timer, 0x400L, mint_timer);
xbra_install(&old_criticerr, 0x404L, (void (*)())mint_criticerr);
xbra_install(&old_5ms, 0x114L, mint_5ms);
xbra_install(&old_vbl, 4*0x1cL, mint_vbl);
xbra_install(&old_resvec, 0x42aL, reset);
old_resval = *((long *)0x426L);
spl(savesr);
#ifdef EXCEPTION_SIGS
/* set up signal handlers */
xbra_install(&old_bus, 8L, new_bus);
xbra_install(&old_addr, 12L, new_addr);
xbra_install(&old_ill, 16L, new_ill);
xbra_install(&old_divzero, 20L, new_divzero);
xbra_install(&old_trace, 36L, new_trace);
# ifdef STRICT_PRIV
/* don't do this */
xbra_install(&old_priv, 32L, new_priv);
# endif
#endif
/* set up disk vectors */
xbra_install(&old_mediach, 0x47eL, new_mediach);
xbra_install(&old_rwabs, 0x476L, new_rwabs);
xbra_install(&old_getbpb, 0x472L, new_getbpb);
olddrvs = *((long *)0x4c2L);
/* set up cookie jar */
oldcookie = *CJAR; /* CJAR defined in cookie.h */
install_cookies();
}
/* restore all interrupt vectors and trap routines */
/*
* NOTE: This is *not* the approved way of unlinking XBRA trap handlers.
* Normally, one should trace through the XBRA chain. However, this is
* a very unusual situation: when MiNT exits, any TSRs or programs running
* under MiNT will no longer exist, and so any vectors that they have
* caught will be pointing to never-never land! So we do something that
* would normally be considered rude, and restore the vectors to
* what they were before we ran.
* BUG: we should restore *all* vectors, not just the ones that MiNT caught.
*/
void
restr_intr()
{
short savesr;
savesr = spl7();
*syskey = oldkey; /* restore keyboard vectors */
*tosbp = _base; /* restore GEMDOS basepage pointer */
*CJAR = oldcookie; /* restore old cookie jar */
#ifdef EXCEPTION_SIGS
*((long *)0x08L) = (long) old_bus.next;
*((long *)0x0cL) = (long) old_addr.next;
*((long *)0x10L) = (long) old_ill.next;
*((long *)0x14L) = (long) old_divzero.next;
# ifdef STRICT_PRIV
*((long *)0x20L) = (long) old_priv.next;
# endif
*((long *)0x24L) = (long) old_trace.next;
#endif
*((long *)0x84L) = (long) old_dos.next;
*((long *)0xb4L) = (long) old_bios.next;
*((long *)0xb8L) = (long) old_xbios.next;
*((long *)0x408L) = old_term;
*((long *)0x404L) = (long) old_criticerr.next;
*((long *)0x114L) = (long) old_5ms.next;
*((long *)0x400L) = (long) old_timer.next;
*((long *)0x70L) = (long) old_vbl.next;
*((long *)0x426L) = old_resval;
*((long *)0x42aL) = (long) old_resvec.next;
*((long *)0x476L) = (long) old_rwabs.next;
*((long *)0x47eL) = (long) old_mediach.next;
*((long *)0x472L) = (long) old_getbpb.next;
*((long *)0x4c2L) = olddrvs;
spl(savesr);
}
/* we save the TOS supervisor stack pointer so that we can reset it when
calling Pterm() (not that anyone will ever want to leave MiNT :-)).
*/
long tosssp; /* TOS supervisor stack pointer */
/*
* enter_kernel: called every time we enter the MiNT kernel via a trap
* call. Sets up the GEMDOS and BIOS vectors to point to TOS, and
* sets up other vectors and system variables appropriately. Note that
* calling enter_kernel multiple times should not be harmful!
*/
short in_kernel = 0;
void
enter_kernel()
{
short save_sr;
if (in_kernel) return;
save_sr = spl7();
save_dos = *((long *) 0x84L);
save_bios = *((long *) 0xb4L);
save_xbios = *((long *) 0xb8L);
*((long *) 0x84L) = (long)old_dos.next;
*((long *) 0xb4L) = (long)old_bios.next;
*((long *) 0xb8L) = (long)old_xbios.next;
*tosbp = rootproc->base;
in_kernel = 1;
spl(save_sr);
}
/*
* leave_kernel: called before leaving the kernel, either back to
* user mode or when calling a signal handler or the GEMDOS
* terminate vector. Note that interrupts should be disabled before
* this routine is called.
*/
void
leave_kernel()
{
if (!in_kernel) {
ALERT("leave_kernel: not in kernel??");
}
*((long *) 0x84L) = save_dos;
*((long *) 0xb4L) = save_bios;
*((long *) 0xb8L) = save_xbios;
*tosbp = curproc->base;
in_kernel = 0;
}
/*
* shut down processes; this involves waking them all up, and sending
* them SIGTERM to give them a chance to clean up after themselves
*/
static void
shutmedown(p)
PROC *p;
{
curproc->wait_cond = 0;
}
void
shutdown()
{
PROC *p;
int proc_left = 0;
curproc->sighandle[SIGCHLD] = SIG_IGN;
for (p = proclist; p; p = p->gl_next) {
if (p->pid == 0) continue;
if (p->wait_q != ZOMBIE_Q && p->wait_q != TSR_Q) {
if (p->wait_q != READY_Q) {
rm_q(p->wait_q, p);
add_q(READY_Q, p);
}
post_sig(p, SIGTERM);
proc_left++;
}
}
if (proc_left) {
/* sleep a little while, to give the other processes a chance to
shut down
*/
addtimeout(1000, shutmedown);
do {
sleep(WAIT_Q, (long)&shutdown);
} while (curproc->wait_cond == (long)&shutdown);
}
}
#ifdef ZEROEXIT
/*
* a horrible kludge: TOS 1.4 has a bug that causes GEM to get upset
* if a large AUTO folder program runs and leaves non-zero memory
* behind. So, before we leave, we zero as much of ourselves as
* possible. To do this, we copy a short, position independent
* assembly language function into the basepage, and then execute
* it; the function will take care of exiting.
* Note: the GEM bug doesn't usually bite because most AUTO folder
* programs are TSRs and hence GEM doesn't reuse their memory.
*/
static short exitfunc[] = {
0x41fa, 0x0012, /* lea end(pc), a0 */
0x226f, 0x0004, /* move.l 4(sp), a1 */
0x4240, /* clr.w d0 */
0x30c0, /* L1: move.w d0, a0@+ */
0xb3c8, /* cmp.l a0, a1 */
0x66fa, /* bne L1 */
0x3f00, /* move.w d0, sp@- */
0x4e41 /* trap #1 */
}; /* end: */
void zeroexit()
{
int i;
short *to, *from;
void (*func)();
if (mcpu > 10) { /* on 68020+, we could run into cache problems */
Pterm0(); /* let's hope we're running a fixed version of TOS */
}
to = (short *)_base->p_cmdlin;
func = (void (*)()) to;
from = exitfunc;
for (i = 0; i < sizeof(exitfunc); i++) {
*to++ = *from++;
}
(*P_((void (*)(long)))func)(_base->p_hitpa);
}
#else /* zerofunc */
void zeroexit() { Pterm0(); }
#endif
int
main(argc, argv, envp)
int argc;
char **argv;
char **envp;
{
long *sysbase;
long r;
extern int debug_level; /* in debug.c */
static char buf[SPRINTF_MAX];
static char curpath[128];
int yn;
FILEPTR *f;
/* Allow the user to abort the boot if the magic combination of shift keys
* is held down (see MAGIC_SHIFT above)
*/
if ((Kbshift(-1) & MAGIC_SHIFT) == MAGIC_SHIFT) {
Cconws("Boot MiNT? (y/n) ");
yn = Cconin() & 0x7f;
if (yn != 'y' && yn != 'Y') {
Cconws("\r\n\r\nMiNT not booted, at user's request.\r\n");
Pterm0();
}
}
if (argv[0][0] == 0) { /* maybe started from the desktop */
curs_off = 1;
}
if (argc > 1) {
debug_level++;
}
if (argc > 2) {
debug_level++;
}
/* greetings */
Cconws("\r\n\033eMiNT is Not TOS: MiNT version ");
#ifdef PATCHLEVEL
ksprintf(buf, VERS_STRING, MAJ_VERSION, MIN_VERSION, PATCHLEVEL);
#else
ksprintf(buf, VERS_STRING, MAJ_VERSION, MIN_VERSION);
#endif
Cconws(buf);
Cconws("\r\nCopyright 1990,1991,1992 Eric R. Smith\r\n");
Cconws("Use this program at your own risk!\r\n");
Cconws("See the file \"copying\" for distribution conditions\r\n");
gem_active = check_for_gem(); /* this must be done from user mode */
/*
* get the current directory, so that we can switch back to it after
* the file systems are properly initialized
*/
/* set the current directory for the current process */
(void)Dgetpath(curpath, 0);
tosssp = (long)Super(0L); /* enter supervisor mode */
/* figure out what kind of machine we're running on */
/* biosfs wants to know this, so we have to do it very
* early in our initialization
*/
getmch();
/* get GEMDOS pointer to current basepage */
/* 0x4f2 points to the base of the OS; here we can find the OS compilation
date, and (in newer versions of TOS) where the current basepage pointer
is kept; in older versions of TOS, it's at 0x602c
*/
sysbase = *((long **)(0x4f2L)); /* gets the RAM OS header */
sysbase = (long *)sysbase[2]; /* gets the ROM one */
tosvers = (sysbase[0] & 0x0000ffff);
if (tosvers == 0x100) {
if ((sysbase[7] & 0xfffe0000) == 0x00080000)
tosbp = (BASEPAGE **)0x873cL; /* SPANISH ROM */
else
tosbp = (BASEPAGE **) 0x602cL;
kbshft = (char *) 0x0e1bL;
} else {
tosbp = (BASEPAGE **) sysbase[10];
kbshft = (char *) sysbase[9];
}
/* The TT TOS release notes are wrong... this is the real way to test
* for Bconmap ability
*/
has_bconmap = (Bconmap(0) == 0);
/* initialize memory */
init_mem();
TRACE("back from init_mem");
/* initialize the basic file systems */
init_filesys();
TRACE("back from init_filesys");
/* initialize processes */
init_proc();
TRACE("back from init_proc");
/* initialize system calls */
init_dos();
init_bios();
init_xbios();
/* NOTE: there's a call to kmalloc embedded in install_cookies, which
* is called by init_intr; so make sure this is the last of the
* init_* things called!
*/
init_intr();
enter_kernel();
/* set up standard file handles for the current process
* do this here, *after* init_intr has set the Rwabs vector,
* so that AHDI doesn't get upset by references to drive U:
*/
f = do_open("U:\\DEV\\CONSOLE", O_RDWR, 0, (XATTR *)0);
if (!f) {
FATAL("unable to open CONSOLE device");
}
curproc->control = f;
curproc->handle[0] = f;
curproc->handle[1] = f;
f->links = 3;
f = do_open("U:\\DEV\\MODEM1", O_RDWR, 0, (XATTR *)0);
curproc->aux = f;
if (has_bconmap) {
/* If someone has already done a Bconmap call, then
* MODEM1 may no longer be the default
*/
bconmap(curbconmap);
f = curproc->aux; /* bconmap can change curproc->aux */
}
if (f) {
curproc->handle[2] = f;
f->links++;
}
f = do_open("U:\\DEV\\CENTR", O_RDWR, 0, (XATTR *)0);
if (f) {
curproc->handle[3] = curproc->prn = f;
f->links = 2;
}
if (f) {
f = do_open("U:\\DEV\\MIDI", O_RDWR, 0, (XATTR *)0);
curproc->midiin = curproc->midiout = f;
f->links = 2;
}
/* load external file systems */
if (*curpath) {
(void)d_setpath(curpath);
}
load_filesys();
/* note that load_filesys changed the
* directory on us!!
*/
if (*curpath) {
(void)d_setpath(curpath);
}
/* load the configuration file */
load_config();
/* if we want pseudo-drives, set the drive map accordingly */
if (pseudodrives > 0) {
*((long *)0x4c2L) |= PSEUDODRVS;
};
if (pseudodrives < 2) { /* restore old Rwabs, etc. */
*((long *)0x476L) = (long) old_rwabs.next;
*((long *)0x47eL) = (long) old_mediach.next;
*((long *)0x472L) = (long) old_getbpb.next;
}
if (init_env == 0)
init_env = (char *)_base->p_env;
/* empty environment? Set the PATH variable to the root of the current drive */
if (init_env[0] == 0) {
static char path_env[] = "PATH=\0C:\0";
path_env[6] = curproc->curdrv + 'A';
init_env = path_env;
}
/* run any programs appearing after us in the AUTO folder */
run_auto_prgs();
/* run the initial program */
r = p_exec(0, init_prg, init_tail, init_env);
/* if it isn't found, and the user didn't say otherwise, try GEM */
if (r == EFILNF && init_prg == orig_init) {
if (!gem_active) {
BASEPAGE *bp; int pid;
bp = (BASEPAGE *)p_exec(7, (char *)7L, (char *)"\0", init_env);
bp->p_tbase = *((long *) 0x4feL );
pid = p_exec(106, (char *)"GEM", bp, 0L);
if (pid > 0) {
do {
r = p_wait3(0, (long *)0);
} while(pid != ((r & 0xffff0000) >> 16));
r &= 0x0000ffff;
}
} else {
Cconws("If MiNT is run after GEM starts, you must specify a program\r\n");
Cconws("to run initially in MINT.CNF, with an INIT= line\r\n");
r = 0;
}
}
if (r < 0) {
ksprintf(buf, "FATAL: couldn't run %s\r\n", init_prg);
Cconws(buf);
}
if (r) {
ksprintf(buf, "exit code: %ld\r\n", r);
Cconws(buf);
}
/* shut down all processes gracefully */
shutdown();
/* put everything back and exit */
restr_intr();
close_filesys();
(void)Super((void *)tosssp); /* gratuitous (void *) for Lattice */
Cconws("leaving MiNT\r\n");
if (curs_off)
Cconws("\033f"); /* disable cursor */
zeroexit();
return 0; /* dummy -- this should never be reached */
}
/*
* cookie jar handling routines. The "cookie jar" is an area of memory
* reserved by TOS for TSR's and utility programs; the idea is that
* you put a cookie in the jar to notify people of available services.
* The BIOS uses the cookie jar in TOS 1.6 and higher; for earlier versions
* of TOS, the jar is always empty (unless someone added a cookie before
* us; POOLFIX does, for example).
* MiNT establishes an entirely new cookie jar (with the old cookies copied
* over) and frees it on exit. That's because TSR's run under MiNT
* will no longer be accessible after MiNT exits.
* MiNT also puts a cookie in the jar, with tag field 'MiNT' (of course)
* and with the major version of MiNT in the high byte of the low word,
* and the minor version in the low byte.
*/
void
install_cookies()
{
COOKIE *cookie;
int i, ncookies;
/* note that init_intr sets oldcookie to the old cookie jar */
ncookies = 0;
cookie = oldcookie;
if (cookie) {
while (cookie->tag.aslong != 0) {
/* check for true FPU co-processor */
if (!strncmp(cookie->tag.aschar, "_FPU",4) &&
(cookie->value >> 16) >= 2)
fpu = 1;
/* check for _FLK cookie */
else if (!strncmp(cookie->tag.aschar, "_FLK",4))
flk = 1;
cookie++; ncookies++;
}
}
/* NOTE: obviously, we can do this only if init_intr is called
* _after_ memory, processes, etc. have been initialized
*/
newcookie = (COOKIE *)kmalloc((ncookies + 16)*sizeof(COOKIE));
assert(newcookie);
/* copy the old cookies to the new jar */
for (i = 0; i < ncookies; i++) {
newcookie[i] = oldcookie[i];
}
/* install MiNT cookie */
strncpy(newcookie[i].tag.aschar, "MiNT", 4);
newcookie[i].value = (MAJ_VERSION << 8) | MIN_VERSION;
i++;
/* install _FLK cookie to indicate that file locking works */
if (!flk) {
strncpy(newcookie[i].tag.aschar, "_FLK", 4);
newcookie[i].value = 0;
i++;
}
/* the last cookie should have a 0 tag, and a value indicating the number
* of slots, total
*/
newcookie[i].tag.aslong = 0;
newcookie[i].value = ncookies+16;
*CJAR = newcookie;
}
/*
* get the value of the _MCH cookie, if one exists
* this must be done in a separate routine because the machine type
* is needed when initializing the bios file system, whereas
* install_cookies is not called until everything is installed
* In fact, getmch() should be called before *anything* else is
* initialized, so that if we find a MiNT cookie already in the
* jar we can bail out early.
*/
static void
getmch()
{
COOKIE *jar;
jar = *CJAR; /* CJAR defined in cookie.h */
if (jar) {
while (jar->tag.aslong != 0) {
/* check for machine type */
if (!strncmp(jar->tag.aschar, "_MCH",4)) {
mch = jar->value;
} else if (!strncmp(jar->tag.aschar, "_CPU", 4)) {
mcpu = jar->value;
if (mcpu == 10)
m68010 = 1;
} else if (!strncmp(jar->tag.aschar, "MiNT",4)) {
Cconws("MiNT is already installed!!\r\n");
(void)Super((void *)tosssp);
Pterm(2);
}
jar++;
}
}
}
/*
* routines for reading the configuration file
* we allow the following commands in the file:
* # anything -- comment
* INIT=file -- specify boot program
* cd dir -- change directory/drive
* ren file1 file2 -- rename a file
* sln file1 file2 -- create a symbolic link
* echo message -- print a message on the screen
* setenv var value -- set an environment variable
*
* BUG: if you use setenv in mint.cnf, *none* of the original environment
* gets passed to children. This is rarely a problem if mint.prg is
* in the auto folder.
*/
extern short bconbdev, bconbsiz; /* from bios.c */
static void
doset(name, val)
char *name, *val;
{
char *t;
if (!strcmp(name, "INIT")) {
t = kmalloc(strlen(val)+1);
if (!t) return;
strcpy(t, val);
init_prg = t;
while (*t && !isspace(*t)) t++;
/* get the command tail, too */
if (*t) {
*t++ = 0;
strncpy(init_tail+1, t, 125);
init_tail[0] = strlen(init_tail+1);
}
return;
}
if (!strcmp(name, "CON")) {
FILEPTR *f;
int i;
f = do_open(val, O_RDWR, 0, (XATTR *)0);
if (f) {
for (i = -1; i < 2; i++) {
do_close(curproc->handle[i]);
curproc->handle[i] = f;
f->links++;
}
f->links--; /* correct for overdoing it */
}
return;
}
if (!strcmp(name, "PRN")) {
FILEPTR *f;
f = do_open(val, O_RDWR|O_CREAT|O_TRUNC, 0, (XATTR *)0);
if (f) {
do_close(curproc->handle[2]);
do_close(curproc->prn);
curproc->prn = curproc->handle[2] = f;
f->links = 2;
}
return;
}
if (!strcmp(name, "BIOSBUF")) {
if (*val == 'n' || *val == 'N') {
if (bconbsiz) bflush();
bconbdev = -1;
}
return;
}
if (!strcmp(name, "PSEUDODRIVES")) {
if (*val == 'n' || *val == 'N') {
pseudodrives = 0;
} else if (*val == 'm' || *val == 'M') {
pseudodrives = 1;
}
return;
}
if (!strcmp(name, "DEBUG_LEVEL")) {
extern int debug_level;
if (*val >= '0' && *val <= '9') debug_level = atoi(val);
else ALERT("Bad arg to \"DEBUG_LEVEL\" in cnf file");
return;
}
if (!strcmp(name, "DEBUG_DEVNO")) {
extern int out_device;
if (*val >= '0' && *val <= '9') out_device= atoi(val);
else ALERT("Bad arg to \"DEBUG_DEVNO\" in cnf file");
return;
}
#ifdef FASTTEXT
if (!strcmp(name, "HARDSCROLL")) {
int i = 0;
extern int hardscroll;
i = *val++;
if (i < '0' || i > '9') return;
hardscroll = i-'0';
i = *val;
if (i < '0' || i > '9') return;
hardscroll = 10*hardscroll + i - '0';
return;
}
#endif
ALERT("Unknown variable `%s'", name);
}
/* Execute a line from the config file */
static void
do_line(line)
char *line;
{
char *cmd, *arg1, *arg2;
char *newenv;
char *t;
int i;
while (*line == ' ') line++;
if (*line == '#') return; /* ignore comments */
if (!*line) return; /* and also blank lines */
cmd = line;
/* check for variable assignments (e.g. INIT=, etc.) */
/*
* AGK: note we check for spaces whilst scanning so that an environment
* variable may include an =, this has the unfortunate side effect that
* the '=' _has_ to be concatenated to the variable name (INIT etc.)
*/
for (t = cmd; *t && *t != ' '; t++) {
if (*t == '=') {
*t++ = 0;
doset(cmd, t);
return;
}
}
/* OK, assume a regular command; break it up into 'cmd', 'arg1', arg2' */
while (*line && *line != ' ') line++;
if (*line == ' ') {
*line++ = 0;
while (*line == ' ') line++;
}
if (!strcmp(cmd, "echo")) {
c_conws(line); c_conws("\r\n");
return;
}
arg1 = line;
while (*line && *line != ' ') line++;
if (*line) {
*line++ = 0;
while (*line == ' ') line++;
}
if (!strcmp(cmd, "cd")) {
int drv;
(void)d_setpath(arg1);
drv = toupper(*arg1) - 'A';
if (arg1[1] == ':') (void)d_setdrv(drv);
return;
}
if (!strcmp(cmd, "exec")) {
static char cmdline[128];
int i;
i = strlen(line);
if (i > 126) i = 126;
cmdline[0] = i;
strncpy(cmdline+1, line, i);
cmdline[i+1] = 0;
i = p_exec(0, arg1, cmdline, init_env);
if (i == -33) {
ALERT("%s: file not found", arg1);
} else if (i < 0) {
ALERT("%s: error while attempting to execute", arg1);
}
return;
}
if (!strcmp(cmd, "setenv")) {
if (strlen(arg1) + strlen(line) + 4 + (env_ptr - init_env) >
env_len) {
newenv = umalloc(env_len + 1024L);
t = init_env;
env_ptr = newenv;
for (i = 0; i < env_len; i++)
*env_ptr++ = *t++;
env_len += 1024;
if (init_env)
ufree(init_env);
init_env = newenv;
}
while (*arg1) {
*env_ptr++ = *arg1++; env_len++;
}
*env_ptr++ = '=';
while (*line) {
*env_ptr++ = *line++; env_len++;
}
*env_ptr++ = 0;
*env_ptr = 0;
return;
}
arg2 = line;
while (*line && *line != ' ') line++;
if (*line) {
*line++ = 0;
}
if (!strcmp(cmd, "sln")) {
(void)f_symlink(arg1, arg2);
return;
}
if (!strcmp(cmd, "ren")) {
(void)f_rename(0, arg1, arg2);
return;
}
ALERT("syntax error in mint.cnf");
}
#define BUF 512
#define LINE 256
void
load_config()
{
int fd;
long r;
char buf[BUF+1], c;
char line[LINE+1];
char *from;
int count = 0;
TRACE("reading configuration file");
fd = f_open("mint.cnf", 0);
if (fd < 0)
fd = f_open("\\mint\\mint.cnf", 0);
if (fd < 0) return;
buf[BUF] = 0;
from = &buf[BUF];
line[LINE] = 0;
for(;;) {
c = *from++;
if (!c) {
r = f_read(fd, (long)BUF, buf);
if (r <= 0) break;
buf[r] = 0;
from = buf;
} else if (c == '\r') {
continue;
} else if (c == '\n') {
line[count] = 0;
do_line(line);
count = 0;
} else {
if (count < LINE) {
line[count++] = c;
}
}
}
f_close(fd);
}
/*
* run programs in the AUTO folder that appear after MINT.PRG
* some things to watch out for:
* (1) make sure GEM isn't active
* (2) make sure there really is a MINT.PRG in the auto folder
*/
/*
* some global variables used to see if GEM is active
*/
static short aes_intout[64];
static short aes_dummy[64];
static short aes_globl[15];
static short aes_cntrl[6] = { 10, 0, 1, 0, 0 };
short *aes_pb[6] = { aes_cntrl, aes_globl, aes_dummy, aes_intout,
aes_dummy, aes_dummy };
/* check for whether GEM is active; remember, this *must* be done in
* user mode
*/
static int
check_for_gem()
{
call_aes(aes_pb); /* does an appl_init */
return aes_globl[0];
}
static void
run_auto_prgs()
{
DTABUF *dta;
long r;
static char pathspec[32] = "\\AUTO\\";
short runthem = 0; /* set to 1 after we find MINT.PRG */
/* if the AES is running, don't check AUTO */
if (gem_active) {
return;
}
/* OK, now let's run through \\AUTO looking for
* programs...
*/
dta = (DTABUF *)f_getdta();
r = f_sfirst("\\AUTO\\*.PRG", 0);
while (r >= 0) {
if (!strcmp(dta->dta_name, "MINT.PRG"))
runthem = 1;
else if (runthem) {
strcpy(pathspec+6, dta->dta_name);
(void)p_exec(0, pathspec, (char *)"", init_env);
}
r = f_snext();
}
}