2 * Copyright (c) 1992, 1993, 1996
3 * Berkeley Software Design, Inc. All rights reserved.
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30 * BSDI doscmd.c,v 2.3 1996/04/08 19:32:30 bostic Exp
32 * $FreeBSD: src/usr.bin/doscmd/doscmd.c,v 1.13.2.6 2002/04/25 11:04:51 tg Exp $
33 * $DragonFly: src/usr.bin/doscmd/doscmd.c,v 1.4 2004/01/21 21:48:21 rob Exp $
36 #include <sys/types.h>
37 #include <sys/param.h>
50 #include <machine/param.h>
51 #include <machine/vmparam.h>
53 #include <machine/sysarch.h>
54 #include <machine/vm86.h>
68 int timer_disable = 0;
69 struct timeval boot_time;
70 unsigned long *ivec = NULL;
73 #define PRB_V86_FORMAT 0x4242
75 struct vconnect_area vconnect_area = {
76 0, /* Interrupt state */
77 PRB_V86_FORMAT, /* Magic number */
78 { 0, }, /* Pass through ints */
79 { 0x00000000, 0x00000000 } /* Magic iret location */
83 /* local prototypes */
84 static void setup_boot(regcontext_t *REGS);
85 static int try_boot(int);
86 static void setup_command(int argc, char *argv[], regcontext_t *REGS);
87 static FILE *find_doscmdrc(void);
88 static int do_args(int argc, char *argv[]);
89 static void usage(void);
90 static int open_name(char *name, char *ext);
92 /* Local option flags &c. */
95 /* DOS environment emulation */
96 static unsigned ecnt = 0;
97 static char *envs[256];
99 /* Search path and command name */
100 static char *dos_path = 0;
101 char cmdname[256]; /* referenced from dos.c */
103 static struct vm86_init_args kargs;
107 main(int argc, char **argv)
112 struct vm86_struct vm86s;
113 #define sc vm86s.substr.regs.vmsc
115 regcontext_t *REGS = (regcontext_t *)&uc.uc_mcontext;
120 sigemptyset(&sigset);
121 sigaddset(&sigset, SIGIO);
122 sigaddset(&sigset, SIGALRM);
123 sigprocmask(SIG_BLOCK, &sigset, 0);
128 /* XXX should only be for tty mode */
129 fd = open (_PATH_DEVNULL, O_RDWR);
131 dup2 (fd, 3); /* stdaux */
133 dup2 (fd, 4); /* stdprt */
134 if (fd != 3 && fd != 4)
138 debug_set(0); /* debug any D_TRAPS without intnum */
140 /* perform option argument processing */
145 if (vflag && debugf == stderr) {
147 setbuf (stdout, NULL);
152 /* This needs to happen before the executable is loaded */
156 memset(&vm86s, 0, sizeof(vm86s));
160 * With no other arguments we will assume we must boot DOS
167 * Nominate interrupts to handle here when the kernel is
168 * performing interrupt handling.
170 * I would like to let INT 2F pass through as well, but I
171 * need to get my hands on INT 2F:11 to do file redirection.
173 for (i = 0; i <= 0xff; ++i) {
178 kargs.int_map[i >> 3] |= (1 << (i & 7));
180 vconnect_area.passthru[i >> 5] &= ~(1 << (i & 0x1f));
182 vm86s.int_byuser[i >> 3] |= (1 << (i & 0x07));
188 kargs.int_map[i >> 3] &= ~(1 << (i & 7));
190 vconnect_area.passthru[i >> 5] |= (1 << (i & 0x1f));
192 vm86s.int_byuser[i >> 3] |= (1 << (i & 0x07));
200 if (booting) { /* are we booting? */
202 } else { /* no, load a command */
203 setup_command(argc, argv, REGS);
206 /* install signal handlers */
207 setsignal(SIGFPE, sigfpe); /* */
208 setsignal(SIGALRM, sigalrm); /* */
209 setsignal(SIGILL, sigill); /* */
210 setsignal(SIGTRAP, sigtrap); /* */
211 setsignal(SIGUSR2, sigtrace); /* */
212 setsignal(SIGINFO, sigtrace); /* */
214 setsignal(SIGURG, sigurg); /* entry from NetBSD vm86 */
216 setsignal(SIGBUS, sigbus); /* entry from FreeBSD, BSD/OS vm86 */
219 /* Call init functions */
222 init_io_port_handlers();
240 gettimeofday(&boot_time, 0);
242 if (zflag) for (;;) pause(); /* spin if requested */
246 * If we have a raw keyboard, and hence, video,
247 * sneak in a call to the video BIOS to reinit the
251 static u_char video_trampoline[] = {
253 0xB8, 0x03, 0x00, /* mov ax,00003h */
254 0xCD, 0x10, /* int 010h */
259 video_vector = insert_generic_trampoline(
260 sizeof(video_trampoline), video_trampoline);
265 PUTVEC(R_CS, R_IP, video_vector);
268 sigemptyset(&uc.uc_sigmask);
269 sigaltstack(NULL, &uc.uc_stack);
270 uc.uc_mcontext.mc_onstack = 0;
276 R_EAX = (booting || raw_kbd) ? (int)&vconnect_area : -1;
277 R_EFLAGS |= PSL_VM | PSL_VIF; /* request VM86 mode */
279 i386_vm86(VM86_INIT, &kargs);
282 debug(D_ALWAYS,"sigreturn failed : %s\n", strerror(errno));
284 vm86s.cpu_type = VCPU_586;
288 /* shouldn't get here */
289 if (vflag) dump_regs(REGS);
290 fatal ("vm86 returned (no kernel support?)\n");
302 setup_boot(regcontext_t *REGS)
304 FILE *fp; /* doscmdrc handle */
305 int fd; /* don't close this! */
307 fp = find_doscmdrc(); /* get doscmdrc */
309 fprintf(stderr, "You must have a doscmdrc to boot\n");
313 booting = read_config(fp); /* where to boot from? */
315 if (booting < 0) { /* not specified */
316 if ((fd = try_boot(booting = 0)) < 0) /* try A: */
317 fd = try_boot(booting = 2); /* try C: */
319 fd = try_boot(booting); /* do like the man says */
323 errx(1, "Failed to boot");
325 /* initialise registers for entry to bootblock */
334 R_AX = R_BX = R_CX = R_DX = R_SI = R_DI = R_BP = 0;
336 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined (__DragonFly__)
338 ** init a few other context registers
348 ** try to read the boot sector from the specified disk
351 try_boot(int bootdrv)
355 fd = disk_fd(bootdrv);
356 if (fd < 0) { /* can we boot it? */
357 debug(D_DISK, "Cannot boot from %c\n", drntol(bootdrv));
362 if (read(fd, (char *)0x7c00, 512) != 512) {
363 debug(D_DISK, "Short read on boot block from %c:\n", drntol(bootdrv));
373 ** Setup to run a single command and emulate DOS
376 setup_command(int argc, char *argv[], regcontext_t *REGS)
379 u_short param[7] = {0, 0, 0, 0, 0, 0, 0};
382 char buffer[PATH_MAX];
386 fp = find_doscmdrc(); /* dig up a doscmdrc */
388 read_config(fp); /* load config for non-boot mode */
392 if (argc <= 0) /* need some arguments */
395 /* look for a working directory XXX ??? */
396 if (dos_getcwd(drlton('C')) == NULL) {
398 /* try to get our current directory, use '/' if desperate */
399 p = getcwd(buffer, sizeof(buffer));
400 if (!p || !*p) p = getenv("PWD");
401 if (!p || !*p) p = "/";
402 init_path(drlton('C'), "/", p);
404 /* look for PATH= already set, learn from it if possible */
405 for (i = 0; i < ecnt; ++i) {
406 if (!strncmp(envs[i], "PATH=", 5)) {
407 dos_path = envs[i] + 5;
411 /* no PATH in DOS environment? put current directory there*/
413 static char path[256];
414 snprintf(path, sizeof(path), "PATH=C:%s", dos_getcwd(drlton('C')));
416 dos_path = envs[ecnt-1] + 5;
420 /* add a COMSPEC if required */
421 for (i = 0; i < ecnt; ++i) {
422 if (!strncmp(envs[i], "COMSPEC=", 8))
426 put_dosenv("COMSPEC=C:\\COMMAND.COM");
428 /* look for PATH already set, learn from it if possible */
429 for (i = 0; i < ecnt; ++i) {
430 if (!strncmp(envs[i], "PATH=", 5)) {
431 dos_path = envs[i] + 5;
435 /* No PATH, default to c:\ */
437 put_dosenv("PATH=C:\\");
438 dos_path = envs[ecnt-1] + 5;
441 /* if no PROMPT, default to 'DOS>' */
442 for (i = 0; i < ecnt; ++i) {
443 if (!strncmp(envs[i], "PROMPT=", 7))
447 put_dosenv("PROMPT=DOS> ");
449 /* terminate environment */
453 if (dos_getcwd(drlton('R')) == NULL)
454 init_path(drlton('R'), "/", 0);
456 /* get program name */
457 strncpy(prog, *argv++, sizeof(prog) -1);
458 prog[sizeof(prog) -1] = '\0';
460 /* try to open program */
461 if ((fd = open_prog(prog)) < 0) {
462 fprintf (stderr, "%s: command not found\n", prog);
467 load_command(REGS, 1, fd, cmdname, param, argv, envs);
474 ** Try to find a doscmdrc file
482 if ((fp = fopen(".doscmdrc", "r")) == NULL) {
483 struct passwd *pwd = getpwuid(geteuid());
485 snprintf(buffer, sizeof(buffer), "%s/.doscmdrc", pwd->pw_dir);
486 fp = fopen(buffer, "r");
489 char *home = getenv("HOME");
491 snprintf(buffer, sizeof(buffer), "%s/.doscmdrc", home);
492 fp = fopen(buffer, "r");
496 fp = fopen("/etc/doscmdrc", "r");
504 ** commandline argument processing
507 do_args(int argc, char *argv[])
513 while ((c = getopt(argc, argv, "234AbCc:Dd:EGHIi:kLMOo:Pp:RrS:TtU:vVxXYz")) != -1) {
516 debug_flags |= D_TRAPS2;
519 debug_flags |= D_TRAPS3;
522 debug_flags |= D_DEBUGIN;
525 debug_flags |= D_TRAPS | D_ITRAPS;
526 for (c = 0; c < 256; ++c)
533 debug_flags |= D_DOSCALL;
536 if ((capture_fd = creat(optarg, 0666)) < 0) {
542 debug_flags |= D_DISK | D_FILE_OPS;
545 if ((fp = fopen(optarg, "w")) != 0) {
552 debug_flags |= D_EXEC;
555 debug_flags |= D_VIDEO;
558 debug_flags |= D_HALF;
561 debug_flags |= D_ITRAPS;
562 for (c = 0; c < 256; ++c)
567 if ((col = strchr(optarg, ':')) != 0) {
569 i = strtol(col, 0, 0);
571 p = strtol(optarg, 0, 0);
575 define_input_port_handler(p++, inb_traceport);
581 debug_flags |= D_PRINTER;
584 debug_flags |= D_MEMORY;
588 setbuf (stdout, NULL);
592 if ((col = strchr(optarg, ':')) != 0) {
594 i = strtol(col, 0, 0);
596 p = strtol(optarg, 0, 0);
600 define_output_port_handler(p++, outb_traceport);
603 debug_flags |= D_PORT;
607 if ((col = strchr(optarg, ':')) != 0) {
609 i = strtol(col, 0, 0);
611 p = strtol(optarg, 0, 0);
615 define_input_port_handler(p++, inb_port);
616 define_output_port_handler(p++, outb_port);
620 debug_flags |= D_REDIR;
626 debug_flags |= D_TRAPS | D_ITRAPS;
627 debug_set(strtol(optarg, 0, 0));
636 debug_unset(strtol(optarg, 0, 0));
642 debug_flags |= D_TRAPS | D_ITRAPS | D_HALF | 0xff;
645 debug_flags |= D_XMS;
649 fatal("X11 support not compiled in.\n");
654 debug_flags |= D_EMS;
672 fprintf (stderr, "usage: doscmd cmd args...\n");
677 ** look up a DOS command name
679 ** XXX ordering is wrong!
682 open_name(char *name, char *ext)
685 char *p = name + strlen(name);
690 q = strrchr(name, '/');
696 if (!strchr(q, '.')) {
700 if ((fd = open (name, O_RDONLY)) >= 0)
706 if ((fd = open (name, O_RDONLY)) >= 0)
709 if ((fd = open (name, O_RDONLY)) >= 0)
717 ** look up a DOS command, search the path as well.
720 open_prog(char *name)
723 char fullname[1024], tmppath[1024];
731 if (strpbrk(name, ":/\\")) {
732 error = translate_filename(name, fullname, &drive);
736 fd = open_name(fullname, ext);
738 strcpy(cmdname, name);
740 strcat(cmdname, ext);
748 while (*p && *p != ';')
751 memcpy(tmppath, path, p - path);
752 e = tmppath + (p - path);
756 path = *p ? p + 1 : p;
758 error = translate_filename(tmppath, fullname, &drive);
762 fd = open_name(fullname, ext);
765 strcpy(cmdname, tmppath);
767 strcat(cmdname, ext);
776 ** append a value to the DOS environment
779 put_dosenv(const char *value)
781 if (ecnt < sizeof(envs)/sizeof(envs[0])) {
782 if ((envs[ecnt++] = strdup(value)) == NULL) {
783 perror("put_dosenv");
787 fprintf(stderr, "Environment full, ignoring %s\n", value);
792 ** replicate a fd up at the top of the range
797 int sfd = sysconf(_SC_OPEN_MAX);
803 } while (sfd > 0 && errno != EBADF);
805 if (errno == EBADF && dup2(fd, sfd) >= 0) {
819 ** XXX belongs somewhere else perhaps
822 done(regcontext_t *REGS, int val)
829 for (m = "END OF PROGRAM"; *m; ++m)
830 tty_write(*m, 0x8400);
832 for (m = "(PRESS <CTRL-ALT> ANY MOUSE BUTTON TO exit)"; *m; ++m)
833 tty_write(*m, 0x0900);
841 exec_return(REGS, val);
845 void (*func)(void *);
860 if (!xmode) /* XXX not for bootmode */
866 call_on_quit(void (*func)(void *), void *arg)
868 COQ *c = (COQ *)malloc(sizeof(COQ));
870 perror("call_on_quit");
885 /* This is commented out as it is never called. Turn it back on if needed.
892 struct io_range io[] = {
894 { 0x200, 0x200, 1 }, /* 0x200 - 0x400 */
895 { 0x1c80, 2, 1 }, /* 0x1c80 - 0x1c81 */
896 { 0x2c80, 2, 1 }, /* 0x2c80 - 0x2c81 */
897 { 0x3c80, 2, 1 }, /* 0x3c80 - 0x3c81 */
898 { 0x378, 8, 1 }, /* 0x378 - 0x37F */
899 { 0x3c4, 2, 1 }, /* 0x3c4 - 0x3c5 */
900 { 0x3c5, 2, 1 }, /* 0x3ce - 0x3cf */
902 { 0x0, 0x10000, 1 }, /* entire i/o space */
907 for (i = 0; io[i].length; i++)
908 if (i386_set_ioperm(io[i].start, io[i].length, io[i].enable) < 0)
909 err(1, "i386_set_ioperm");
913 /* This is used to map in only the specified port range, instead of all
914 the ports or only certain port ranges.
917 iomap_port(int port, int count)
919 if (i386_set_ioperm(port, count, 1) < 0)
920 err(1, "i386_set_ioperm");
922 debug(D_PORT,"mapped I/O port: port=%#x count=%d\n", port, count);