home *** CD-ROM | disk | FTP | other *** search
- /*
- Copyright 1990,1991,1992 Eric R. Smith.
- Copyright 1992 Atari Corporation.
- All rights reserved.
- */
-
- /* miscellaneous DOS functions, and the DOS initialization function */
-
- #include "mint.h"
-
- #define DOS_MAX 0x140
-
- Func dos_tab[DOS_MAX];
- short dos_max = DOS_MAX;
-
- static void alarmme P_((PROC *));
-
- long ARGS_ON_STACK
- s_version()
- {
- return Sversion();
- }
-
- /*
- * Super(new_ssp): change to supervisor mode.
- */
-
- long ARGS_ON_STACK
- s_uper(new_ssp)
- long new_ssp;
- {
- int in_super;
- long r;
-
- TRACE(("Super"));
- in_super = curproc->ctxt[SYSCALL].sr & 0x2000;
-
- if (new_ssp == 1) {
- r = in_super ? -1L : 0;
- }
- else {
- curproc->ctxt[SYSCALL].sr ^= 0x2000;
- r = curproc->ctxt[SYSCALL].ssp;
- if (in_super) {
- if (new_ssp == 0) {
- DEBUG(("bad Super call"));
- raise(SIGSYS);
- }
- else {
- curproc->ctxt[SYSCALL].usp =
- curproc->ctxt[SYSCALL].ssp;
- curproc->ctxt[SYSCALL].ssp = new_ssp;
- }
- }
- else {
- curproc->ctxt[SYSCALL].ssp =
- new_ssp ? new_ssp : curproc->ctxt[SYSCALL].usp;
- }
- }
- return r;
- }
-
- /*
- * get/set time and date functions
- */
- long ARGS_ON_STACK t_getdate() { return datestamp; }
- long ARGS_ON_STACK t_gettime() { return timestamp; }
-
- long ARGS_ON_STACK t_setdate(date)
- int date;
- {
- long r;
-
- /* Only the superuser may set date or time */
- if (curproc->euid != 0)
- return EACCDN;
- r = Tsetdate(date);
- datestamp = Tgetdate();
- return r;
- }
-
- long ARGS_ON_STACK t_settime(time)
- int time;
- {
- long r;
-
- if (curproc->euid != 0)
- return EACCDN;
- r = Tsettime(time);
- timestamp = Tgettime();
- return r;
- }
-
- /*
- * GEMDOS extension: Syield(): give up the processor if any other
- * processes are waiting. Always returns 0.
- */
-
- long ARGS_ON_STACK
- s_yield()
- {
- /* reward the nice process */
- curproc->curpri = curproc->pri;
- sleep(READY_Q, curproc->wait_cond);
- return 0;
- }
-
- /*
- * GEMDOS extension:
- * Prenice(pid, delta) sets the process priority level for process pid.
- * A "nice" value < 0 increases priority, one > 0 decreases it.
- * Always returns the new priority (so Prenice(pid, 0) queries the current
- * priority).
- *
- * NOTE: for backward compatibility, Pnice(delta) is provided and is equivalent
- * to Prenice(Pgetpid(), delta)
- */
-
- long ARGS_ON_STACK
- p_renice(pid, delta)
- int pid, delta;
- {
- PROC *p;
-
- if (pid <= 0 || 0 == (p = pid2proc(pid))) {
- return EFILNF;
- }
-
- if (curproc->euid && curproc->euid != p->ruid
- && curproc->ruid != p->ruid) {
- DEBUG(("Prenice: process ownership error"));
- return EACCDN;
- }
- p->pri -= delta;
- if (p->pri < MIN_NICE) p->pri = MIN_NICE;
- if (p->pri > MAX_NICE) p->pri = MAX_NICE;
- p->curpri = p->pri;
- return ((long)p->pri) & 0x0ffff;
- }
-
- long ARGS_ON_STACK
- p_nice(delta)
- int delta;
- {
- return p_renice(curproc->pid,delta);
- }
-
- /*
- * GEMDOS extensions: routines for getting/setting process i.d.'s and
- * user i.d.'s
- */
-
- long ARGS_ON_STACK p_getpid() { return curproc->pid; }
-
- long ARGS_ON_STACK p_getppid() { return curproc->ppid; }
-
- long ARGS_ON_STACK p_getpgrp() { return curproc->pgrp; }
-
- /* note: Psetpgrp(0, ...) is equivalent to Psetpgrp(Pgetpid(), ...) */
- /* also note: Psetpgrp(x, 0) is equivalent to Psetpgrp(x, x) */
-
- long ARGS_ON_STACK p_setpgrp(pid, newgrp)
- int pid, newgrp;
- {
- PROC *p;
-
- if (pid == 0)
- p = curproc;
- else if (0 == (p = pid2proc(pid)))
- return EFILNF;
- if ( (curproc->euid) && (p->ruid != curproc->ruid)
- && (p->ppid != curproc->pid) )
- return EACCDN;
-
- if (newgrp < 0)
- return p->pgrp;
-
- if (newgrp == 0)
- newgrp = p->pid;
-
- return (p->pgrp = newgrp);
- }
-
- long ARGS_ON_STACK p_getuid() { return curproc->ruid; }
- long ARGS_ON_STACK p_getgid() { return curproc->rgid; }
- long ARGS_ON_STACK p_geteuid() { return curproc->euid; }
- long ARGS_ON_STACK p_getegid() { return curproc->egid; }
-
- long ARGS_ON_STACK
- p_setuid(id)
- int id;
- {
- if (curproc->euid == 0 || curproc->ruid == id) {
- curproc->ruid = curproc->euid = id;
- return id;
- }
- return EACCDN;
- }
-
- long ARGS_ON_STACK
- p_setgid(id)
- int id;
- {
- if (curproc->euid == 0 || curproc->egid == 0 || curproc->rgid == id) {
- curproc->egid = curproc->rgid = id;
- return id;
- }
- return EACCDN;
- }
-
- /*
- * a way to get/set process-specific user information. the user information
- * longword is set to "arg", unless arg is -1. In any case, the old
- * value of the longword is returned.
- */
-
- long ARGS_ON_STACK
- p_usrval(arg)
- long arg;
- {
- long r;
-
- TRACE(("Pusrval"));
- r = curproc->usrdata;
- if (arg != -1L)
- curproc->usrdata = arg;
- return r;
- }
-
- /*
- * set the file creation mask to "mode". Returns the old value of the
- * mask.
- */
- long ARGS_ON_STACK p_umask(mode)
- unsigned mode;
- {
- long oldmask = curproc->umask;
-
- curproc->umask = mode & (~S_IFMT);
- return oldmask;
- }
-
- /*
- * get/set the domain of a process. domain 0 is the default (TOS) domain.
- * domain 1 is the MiNT domain. for now, domain affects read/write system
- * calls and filename translation.
- */
-
- long ARGS_ON_STACK
- p_domain(arg)
- int arg;
- {
- long r;
- TRACE(("Pdomain(%d)", arg));
-
- r = curproc->domain;
- if (arg >= 0)
- curproc->domain = arg;
- return r;
- }
-
- /*
- * get process resource usage. 8 longwords are returned, as follows:
- * r[0] == system time used by process
- * r[1] == user time used by process
- * r[2] == system time used by process' children
- * r[3] == user time used by process' children
- * r[4] == memory used by process
- * r[5] - r[7]: reserved for future use
- */
-
- long ARGS_ON_STACK
- p_rusage(r)
- long *r;
- {
- r[0] = curproc->systime;
- r[1] = curproc->usrtime;
- r[2] = curproc->chldstime;
- r[3] = curproc->chldutime;
- r[4] = memused(curproc);
- return 0;
- }
-
- /*
- * get/set resource limits i to value v. The old limit is always returned;
- * if v == -1, the limit is unchanged, otherwise it is set to v. Possible
- * values for i are:
- * 1: max. cpu time (milliseconds)
- * 2: max. core memory allowed
- * 3: max. amount of malloc'd memory allowed
- */
- long ARGS_ON_STACK
- p_setlimit(i, v)
- int i;
- long v;
- {
- long oldlimit;
-
- switch(i) {
- case 1:
- oldlimit = curproc->maxcpu;
- if (v >= 0) curproc->maxcpu = v;
- break;
- case 2:
- oldlimit = curproc->maxcore;
- if (v >= 0) {
- curproc->maxcore = v;
- recalc_maxmem(curproc);
- }
- break;
- case 3:
- oldlimit = curproc->maxdata;
- if (v >= 0) {
- curproc->maxdata = v;
- recalc_maxmem(curproc);
- }
- break;
- default:
- DEBUG(("Psetlimit: invalid mode %d", i));
- return EINVFN;
- }
- TRACE(("p_setlimit(%d, %ld): oldlimit = %ld", i, v, oldlimit));
- return oldlimit;
- }
-
- /*
- * pause: just sleeps on IO_Q, with wait_cond == -1. only a signal will
- * wake us up
- */
-
- long ARGS_ON_STACK
- p_pause()
- {
- TRACE(("Pause"));
- sleep(IO_Q, -1L);
- return 0;
- }
-
- /*
- * helper function for t_alarm: this will be called when the timer goes
- * off, and raises SIGALRM
- */
-
- static void
- alarmme(p)
- PROC *p;
- {
- p->alarmtim = 0;
- post_sig(p, SIGALRM);
- }
-
- /*
- * t_alarm(x): set the alarm clock to go off in "x" seconds. returns the
- * old value of the alarm clock
- */
-
- long ARGS_ON_STACK
- t_alarm(x)
- long x;
- {
- long oldalarm;
- oldalarm = t_malarm(x*1000);
- oldalarm = (oldalarm+999)/1000; /* convert to seconds */
- return oldalarm;
- }
-
- /*
- * t_malarm(x): set the alarm clock to go off in "x" milliseconds. returns
- * the old value ofthe alarm clock
- */
-
- long ARGS_ON_STACK
- t_malarm(x)
- long x;
- {
- long oldalarm;
- TIMEOUT *t;
-
- /* see how many milliseconds there were to the alarm timeout */
- oldalarm = 0;
-
- if (curproc->alarmtim) {
- for (t = tlist; t; t = t->next) {
- oldalarm += t->when;
- if (t == curproc->alarmtim)
- goto foundalarm;
- }
- DEBUG(("Talarm: old alarm not found!"));
- oldalarm = 0;
- curproc->alarmtim = 0;
- foundalarm:
- ;
- }
-
- /* we were just querying the alarm */
- if (x < 0)
- return oldalarm;
-
- /* cancel old alarm */
- if (curproc->alarmtim)
- canceltimeout(curproc->alarmtim);
-
- /* add a new alarm, to occur in x milliseconds */
- if (x)
- curproc->alarmtim = addtimeout(x, alarmme);
- else
- curproc->alarmtim = 0;
-
- return oldalarm;
- }
-
- /*
- * sysconf(which): returns information about system configuration.
- * "which" specifies which aspect of the system configuration is to
- * be returned:
- * -1 max. value of "which" allowed
- * 0 max. number of memory regions per proc
- * 1 max. length of Pexec() execution string {ARG_MAX}
- * 2 max. number of open files per process {OPEN_MAX}
- * 3 number of supplementary group id's {currently 0}
- * 4 max. number of processes per uid {CHILD_MAX}
- *
- * unlimited values (e.g. CHILD_MAX) are returned as 0x7fffffffL
- *
- * See also Dpathconf() in dosdir.c.
- */
-
- long ARGS_ON_STACK
- s_ysconf(which)
- int which;
- {
- if (which == -1)
- return 4;
-
- switch(which) {
- case 0:
- return UNLIMITED;
- case 1:
- return 126;
- case 2:
- return MAX_OPEN;
- case 3:
- return 0;
- case 4:
- return UNLIMITED;
- default:
- return EINVFN;
- }
- }
-
- /*
- * Salert: send an ALERT message to the user, via the same mechanism
- * the kernel does (i.e. u:\pipe\alert, if it's available
- */
-
- long ARGS_ON_STACK
- s_alert(str)
- char *str;
- {
- /* how's this for confusing code? _ALERT tries to format the
- * string as an alert box; if it fails, we let the full-fledged
- * ALERT function (which will try _ALERT, and fail again)
- * print the alert to the debugging device
- */
- if (_ALERT(str) == 0)
- ALERT(str);
- return 0;
- }
-
- /*
- * routine for initializing DOS
- *
- * NOTE: before adding new functions, check the definition of
- * DOS_MAX at the top of this file to make sure that there
- * is room; if not, increase DOS_MAX.
- */
-
- void
- init_dos()
- {
- /* miscellaneous initialization goes here */
- timestamp = Tgettime();
- datestamp = Tgetdate();
-
- /* dos table initialization */
- dos_tab[0x00] = p_term0;
- dos_tab[0x01] = c_conin;
- dos_tab[0x02] = c_conout;
- dos_tab[0x03] = c_auxin;
- dos_tab[0x04] = c_auxout;
- dos_tab[0x05] = c_prnout;
- dos_tab[0x06] = c_rawio;
- dos_tab[0x07] = c_rawcin;
- dos_tab[0x08] = c_necin;
- dos_tab[0x09] = c_conws;
- dos_tab[0x0a] = c_conrs;
- dos_tab[0x0b] = c_conis;
- dos_tab[0x0e] = d_setdrv;
- dos_tab[0x10] = c_conos;
- dos_tab[0x11] = c_prnos;
- dos_tab[0x12] = c_auxis;
- dos_tab[0x13] = c_auxos;
- dos_tab[0x14] = m_addalt;
- dos_tab[0x15] = s_realloc;
- dos_tab[0x19] = d_getdrv;
- dos_tab[0x1a] = f_setdta;
- dos_tab[0x20] = s_uper;
- dos_tab[0x2a] = t_getdate;
- dos_tab[0x2b] = t_setdate;
- dos_tab[0x2c] = t_gettime;
- dos_tab[0x2d] = t_settime;
- dos_tab[0x2f] = f_getdta;
- dos_tab[0x30] = s_version;
- dos_tab[0x31] = p_termres;
- dos_tab[0x36] = d_free;
- dos_tab[0x39] = d_create;
- dos_tab[0x3a] = d_delete;
- dos_tab[0x3b] = d_setpath;
- dos_tab[0x3c] = f_create;
- dos_tab[0x3d] = f_open;
- dos_tab[0x3e] = f_close;
- dos_tab[0x3f] = f_read;
- dos_tab[0x40] = f_write;
- dos_tab[0x41] = f_delete;
- dos_tab[0x42] = f_seek;
- dos_tab[0x43] = f_attrib;
- dos_tab[0x44] = m_xalloc;
- dos_tab[0x45] = f_dup;
- dos_tab[0x46] = f_force;
- dos_tab[0x47] = d_getpath;
- dos_tab[0x48] = m_alloc;
- dos_tab[0x49] = m_free;
- dos_tab[0x4a] = m_shrink;
- dos_tab[0x4b] = p_exec;
- dos_tab[0x4c] = p_term;
- dos_tab[0x4e] = f_sfirst;
- dos_tab[0x4f] = f_snext;
- dos_tab[0x56] = f_rename;
- dos_tab[0x57] = f_datime;
- dos_tab[0x5c] = f_lock;
-
- /* MiNT extensions to GEMDOS */
-
- dos_tab[0xff] = s_yield;
- dos_tab[0x100] = f_pipe;
- dos_tab[0x104] = f_cntl;
- dos_tab[0x105] = f_instat;
- dos_tab[0x106] = f_outstat;
- dos_tab[0x107] = f_getchar;
- dos_tab[0x108] = f_putchar;
- dos_tab[0x109] = p_wait;
- dos_tab[0x10a] = p_nice;
- dos_tab[0x10b] = p_getpid;
- dos_tab[0x10c] = p_getppid;
- dos_tab[0x10d] = p_getpgrp;
- dos_tab[0x10e] = p_setpgrp;
- dos_tab[0x10f] = p_getuid;
- dos_tab[0x110] = p_setuid;
- dos_tab[0x111] = p_kill;
- dos_tab[0x112] = p_signal;
- dos_tab[0x113] = p_vfork;
- dos_tab[0x114] = p_getgid;
- dos_tab[0x115] = p_setgid;
-
- dos_tab[0x116] = p_sigblock;
- dos_tab[0x117] = p_sigsetmask;
- dos_tab[0x118] = p_usrval;
- dos_tab[0x119] = p_domain;
- dos_tab[0x11a] = p_sigreturn;
- dos_tab[0x11b] = p_fork;
- dos_tab[0x11c] = p_wait3;
- dos_tab[0x11d] = f_select;
- dos_tab[0x11e] = p_rusage;
- dos_tab[0x11f] = p_setlimit;
- dos_tab[0x120] = t_alarm;
- dos_tab[0x121] = p_pause;
- dos_tab[0x122] = s_ysconf;
- dos_tab[0x123] = p_sigpending;
- dos_tab[0x124] = d_pathconf;
- dos_tab[0x125] = p_msg;
- dos_tab[0x126] = f_midipipe;
- dos_tab[0x127] = p_renice;
- dos_tab[0x128] = d_opendir;
- dos_tab[0x129] = d_readdir;
- dos_tab[0x12a] = d_rewind;
- dos_tab[0x12b] = d_closedir;
- dos_tab[0x12c] = f_xattr;
- dos_tab[0x12d] = f_link;
- dos_tab[0x12e] = f_symlink;
- dos_tab[0x12f] = f_readlink;
- dos_tab[0x130] = d_cntl;
- dos_tab[0x131] = f_chown;
- dos_tab[0x132] = f_chmod;
- dos_tab[0x133] = p_umask;
- dos_tab[0x134] = p_semaphore;
- dos_tab[0x135] = d_lock;
- dos_tab[0x136] = p_sigpause;
- dos_tab[0x137] = p_sigaction;
- dos_tab[0x138] = p_geteuid;
- dos_tab[0x139] = p_getegid;
- dos_tab[0x13a] = p_waitpid;
- dos_tab[0x13b] = d_getcwd;
- dos_tab[0x13c] = s_alert;
- dos_tab[0x13d] = t_malarm;
- }
-