Annotation of sys/lib/libsa/unixdev.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: unixdev.c,v 1.7 2003/08/11 06:23:09 deraadt Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1996-1998 Michael Shalayeff
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 18: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 19: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 20: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 21: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 22: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 24: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 25: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 26: * SUCH DAMAGE.
! 27: *
! 28: */
! 29:
! 30: #include <sys/param.h>
! 31: #include <sys/types.h>
! 32: #include <sys/time.h>
! 33: #include <sys/syscall.h>
! 34: #define open uopen
! 35: #include <sys/fcntl.h>
! 36: #include <dev/cons.h>
! 37: #undef open
! 38: #include "libsa.h"
! 39: #include <lib/libsa/unixdev.h>
! 40:
! 41: int
! 42: unixstrategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
! 43: size_t *rsize)
! 44: {
! 45: int rc = 0;
! 46:
! 47: #ifdef UNIX_DEBUG
! 48: printf("unixstrategy: %s %d bytes @ %d\n",
! 49: (rw==F_READ?"reading":"writing"), size, blk);
! 50: #endif
! 51: if ((rc = ulseek((int)devdata, blk * DEV_BSIZE, 0)) >= 0)
! 52: rc = (rw==F_READ) ? uread((int)devdata, buf, size) :
! 53: uwrite((int)devdata, buf, size);
! 54:
! 55: if (rc >= 0) {
! 56: *rsize = (size_t)rc;
! 57: rc = 0;
! 58: } else
! 59: rc = errno;
! 60:
! 61: return rc;
! 62: }
! 63:
! 64: int
! 65: unixopen(struct open_file *f, ...)
! 66: {
! 67: char **file, *p = NULL;
! 68: va_list ap;
! 69: int fd;
! 70:
! 71: va_start(ap, f);
! 72: file = va_arg(ap, char **);
! 73: va_end(ap);
! 74:
! 75: #ifdef UNIX_DEBUG
! 76: printf("unixopen: %s\n", *file);
! 77: #endif
! 78:
! 79: if (strncmp("/dev/", *file, 5) == 0) {
! 80: /* p = strchr(p + 5, '/') */
! 81: for (p = *file + 5; *p != '\0' && *p != '/'; p++)
! 82: ;
! 83: if (*p == '/')
! 84: *p = '\0';
! 85: }
! 86:
! 87: f->f_devdata = (void *)(fd = uopen(*file, O_RDWR, 0));
! 88:
! 89: *file = p;
! 90: if (p != NULL)
! 91: *p = '/';
! 92:
! 93: return fd < 0 ? -1 : 0;
! 94: }
! 95:
! 96: int
! 97: unixclose(struct open_file *f)
! 98: {
! 99: return uclose((int)f->f_devdata);
! 100: }
! 101:
! 102: int
! 103: unixioctl(struct open_file *f, u_long cmd, void *data)
! 104: {
! 105: return uioctl((int)f->f_devdata, cmd, data);
! 106: }
! 107:
! 108: off_t
! 109: ulseek(int fd, off_t off, int wh)
! 110: {
! 111: return __syscall((quad_t)SYS_lseek, fd, 0, off, wh);
! 112: }
! 113:
! 114:
! 115: void
! 116: unix_probe(struct consdev *cn)
! 117: {
! 118: cn->cn_pri = CN_INTERNAL;
! 119: cn->cn_dev = makedev(0,0);
! 120: printf("ux%d ", minor(cn->cn_dev));
! 121: }
! 122:
! 123: void
! 124: unix_init(struct consdev *cn)
! 125: {
! 126: }
! 127:
! 128: void
! 129: unix_putc(dev_t dev, int c)
! 130: {
! 131: uwrite(1, &c, 1);
! 132: }
! 133:
! 134: int
! 135: unix_getc(dev_t dev)
! 136: {
! 137: if (dev & 0x80) {
! 138: struct timeval tv;
! 139: fd_set fdset;
! 140: int rc;
! 141:
! 142: tv.tv_sec = 0;
! 143: tv.tv_usec = 100000;
! 144: FD_ZERO(&fdset);
! 145: FD_SET(0, &fdset);
! 146:
! 147: if ((rc = syscall(SYS_select, 1, &fdset, NULL, NULL, &tv)) <= 0)
! 148: return 0;
! 149: else
! 150: return 1;
! 151: } else {
! 152: char c;
! 153:
! 154: return uread(0, &c, 1)<1? -1: c;
! 155: }
! 156: }
! 157:
! 158: time_t
! 159: getsecs(void)
! 160: {
! 161: return 1;
! 162: }
! 163:
! 164: void
! 165: time_print(void)
! 166: {
! 167: }
! 168:
! 169: void
! 170: atexit(void)
! 171: {
! 172: }
! 173:
! 174: int
! 175: cnspeed(dev_t dev, int sp)
! 176: {
! 177: return 9600;
! 178: }
! 179:
! 180: void
! 181: __main(void)
! 182: {
! 183: }
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