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Annotation of XNU/bsd/dev/i386/cons.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /* 
        !            23:  * Copyright (c) 1987, 1988 NeXT, Inc.
        !            24:  *
        !            25:  * HISTORY
        !            26:  *  7-Jan-93  Mac Gillon (mgillon) at NeXT
        !            27:  *     Integrated POSIX support
        !            28:  *
        !            29:  * 12-Aug-87  John Seamons (jks) at NeXT
        !            30:  *     Ported to NeXT.
        !            31:  */ 
        !            32: 
        !            33: /*
        !            34:  * Indirect driver for console.
        !            35:  */
        !            36: #import <sys/param.h>
        !            37: #import <sys/systm.h>
        !            38: #import <sys/conf.h>
        !            39: #import <sys/ioctl.h>
        !            40: #import <sys/tty.h>
        !            41: #import <sys/proc.h>
        !            42: #import <sys/uio.h>
        !            43: 
        !            44: struct tty     cons;
        !            45: struct tty     *constty;               /* current console device */
        !            46: 
        !            47: /*ARGSUSED*/
        !            48: int
        !            49: cnopen(dev, flag, devtype, pp)
        !            50:        dev_t dev;
        !            51:        int flag, devtype;
        !            52:        struct proc *pp;
        !            53: {
        !            54:        dev_t device;
        !            55: 
        !            56:        if (constty)
        !            57:            device = constty->t_dev;
        !            58:        else
        !            59:            device = cons.t_dev;
        !            60:        return ((*cdevsw[major(device)].d_open)(device, flag, devtype, pp));
        !            61: }
        !            62: 
        !            63: /*ARGSUSED*/
        !            64: int
        !            65: cnclose(dev, flag, mode, pp)
        !            66:        dev_t dev;
        !            67:        int flag, mode;
        !            68:        struct proc *pp;
        !            69: {
        !            70:        dev_t device;
        !            71: 
        !            72:        if (constty)
        !            73:            device = constty->t_dev;
        !            74:        else
        !            75:            device = cons.t_dev;
        !            76:        return ((*cdevsw[major(device)].d_close)(device, flag, mode, pp));
        !            77: }
        !            78: 
        !            79: /*ARGSUSED*/
        !            80: int
        !            81: cnread(dev, uio, ioflag)
        !            82:        dev_t dev;
        !            83:        struct uio *uio;
        !            84:        int ioflag;
        !            85: {
        !            86:        dev_t device;
        !            87: 
        !            88:        if (constty)
        !            89:            device = constty->t_dev;
        !            90:        else
        !            91:            device = cons.t_dev;
        !            92:        return ((*cdevsw[major(device)].d_read)(device, uio, ioflag));
        !            93: }
        !            94: 
        !            95: /*ARGSUSED*/
        !            96: int
        !            97: cnwrite(dev, uio, ioflag)
        !            98:        dev_t dev;
        !            99:        struct uio *uio;
        !           100:        int ioflag;
        !           101: {
        !           102:     dev_t device;
        !           103: 
        !           104:        if (constty)
        !           105:            device = constty->t_dev;
        !           106:        else
        !           107:            device = cons.t_dev;
        !           108:     return ((*cdevsw[major(device)].d_write)(device, uio, ioflag));
        !           109: }
        !           110: 
        !           111: /*ARGSUSED*/
        !           112: int
        !           113: cnioctl(dev, cmd, addr, flag, p)
        !           114:        dev_t dev;
        !           115:        int cmd;
        !           116:        caddr_t addr;
        !           117:        int flag;
        !           118:        struct proc *p;
        !           119: {
        !           120:        dev_t device;
        !           121: 
        !           122:        if (constty)
        !           123:            device = constty->t_dev;
        !           124:        else
        !           125:            device = cons.t_dev;
        !           126:        /*
        !           127:         * Superuser can always use this to wrest control of console
        !           128:         * output from the "virtual" console.
        !           129:         */
        !           130:        if (cmd == TIOCCONS && constty) {
        !           131:                int error = suser(p->p_ucred, (u_short *) NULL);
        !           132:                if (error)
        !           133:                        return (error);
        !           134:                constty = NULL;
        !           135:                return (0);
        !           136:        }
        !           137:        return ((*cdevsw[major(device)].d_ioctl)(device, cmd, addr, flag, p));
        !           138: }
        !           139: 
        !           140: /*ARGSUSED*/
        !           141: int
        !           142: cnselect(dev, flag, p)
        !           143:        dev_t dev;
        !           144:        int flag;
        !           145:        struct proc *p;
        !           146: {
        !           147:        dev_t device;
        !           148: 
        !           149:        if (constty)
        !           150:            device = constty->t_dev;
        !           151:        else
        !           152:            device = cons.t_dev;
        !           153:        return ((*cdevsw[major(device)].d_select)(device, flag, p));
        !           154: }
        !           155: 
        !           156: #if 0  /* FIXME  - using OSFMK console driver for the moment */
        !           157: int
        !           158: cngetc()
        !           159: {
        !           160:        dev_t device;
        !           161: 
        !           162:        if (constty)
        !           163:            device = constty->t_dev;
        !           164:        else
        !           165:            device = cons.t_dev;
        !           166:        return ((*cdevsw[major(device)].d_getc)(device));
        !           167: }
        !           168: 
        !           169: /*ARGSUSED*/
        !           170: int
        !           171: cnputc(c)
        !           172:        char c;
        !           173: {
        !           174:        dev_t device;
        !           175: 
        !           176:        if (constty)
        !           177:            device = constty->t_dev;
        !           178:        else
        !           179:            device = cons.t_dev;
        !           180:        return ((*cdevsw[major(device)].d_putc)(device, c));
        !           181: }
        !           182: #endif
        !           183: 
        !           184: #if    NCPUS > 1
        !           185: slave_cnenable()
        !           186: {
        !           187:        /* FIXME: what to do here? */
        !           188: }
        !           189: #endif NCPUS > 1
        !           190: 
        !           191: #if 0
        !           192: void
        !           193: kprintf( const char *format, ...)
        !           194: {
        !           195:         /* on PPC this outputs to the serial line */
        !           196:         /* nop on intel ... [email protected] */
        !           197: 
        !           198: }
        !           199: #endif
        !           200: 
        !           201: /*
        !           202:  * Write message to console; create an alert panel if no text-type window
        !           203:  * currently exists. Caller must call alert_done() when finished.
        !           204:  * The height and width arguments are not used; they are provided for 
        !           205:  * compatibility with the 68k version of alert().
        !           206:  */
        !           207: int 
        !           208: alert(
        !           209:        int width, 
        !           210:        int height, 
        !           211:        const char *title, 
        !           212:        const char *msg, 
        !           213:        int p1, 
        !           214:        int p2, 
        !           215:        int p3, 
        !           216:        int p4, 
        !           217:        int p5, 
        !           218:        int p6, 
        !           219:        int p7, 
        !           220:        int p8)
        !           221: {
        !           222:        char smsg[200];
        !           223:        
        !           224:        sprintf(smsg, msg,  p1, p2, p3, p4, p5, p6, p7, p8);
        !           225: #if FIXME  /* [ */
        !           226:        /* DoAlert(title, smsg); */
        !           227: #else
        !           228:        printf("%s\n",smsg);
        !           229: #endif  /* FIXME ] */
        !           230: 
        !           231:        return 0;
        !           232: }
        !           233: 
        !           234: int 
        !           235: alert_done()
        !           236: {
        !           237:        /* DoRestore(); */
        !           238:        return 0;
        !           239: }
        !           240: 

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