| cdev.c (48275) | cdev.c (66549) |
|---|---|
| 1/* 08 Nov 1998*/ 2/* 3 * cdev.c 4 * 5 * 08 Nov 1998 Rajesh Vaidheeswarran 6 * 7 * Copyright (c) 1998 Rajesh Vaidheeswarran 8 * All rights reserved. --- 50 unchanged lines hidden (view full) --- 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * | 1/* 08 Nov 1998*/ 2/* 3 * cdev.c 4 * 5 * 08 Nov 1998 Rajesh Vaidheeswarran 6 * 7 * Copyright (c) 1998 Rajesh Vaidheeswarran 8 * All rights reserved. --- 50 unchanged lines hidden (view full) --- 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 * |
| 67 * 68 * $FreeBSD: head/share/examples/kld/cdev/module/cdev.c 66549 2000-10-02 14:14:07Z sobomax $ |
|
| 67 */ | 69 */ |
| 70#include <sys/types.h> 71#include <sys/uio.h> |
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| 68#include <sys/param.h> 69#include <sys/systm.h> 70#include <sys/ioccom.h> 71#include <sys/systm.h> 72#include <sys/conf.h> 73 74#include "cdev.h" 75 --- 9 unchanged lines hidden (view full) --- 85 * 86 * You would have to use the "-R" option of "ld" to ensure a linkable file 87 * if you were to do this, since you would need to combine multiple ".o" 88 * files into a single ".o" file for use by "modload". 89 */ 90 91#define CDEV_IOCTL1 _IOR('C', 1, u_int) 92 | 72#include <sys/param.h> 73#include <sys/systm.h> 74#include <sys/ioccom.h> 75#include <sys/systm.h> 76#include <sys/conf.h> 77 78#include "cdev.h" 79 --- 9 unchanged lines hidden (view full) --- 89 * 90 * You would have to use the "-R" option of "ld" to ensure a linkable file 91 * if you were to do this, since you would need to combine multiple ".o" 92 * files into a single ".o" file for use by "modload". 93 */ 94 95#define CDEV_IOCTL1 _IOR('C', 1, u_int) 96 |
| 97/* Stores string recv'd by _write() */ 98static char buf[512+1]; 99static int len; 100 |
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| 93int 94mydev_open(dev_t dev, int flag, int otyp, struct proc *procp) 95{ 96 printf("mydev_open: dev_t=%d, flag=%x, otyp=%x, procp=%p\n", 97 dev2udev(dev), flag, otyp, procp); | 101int 102mydev_open(dev_t dev, int flag, int otyp, struct proc *procp) 103{ 104 printf("mydev_open: dev_t=%d, flag=%x, otyp=%x, procp=%p\n", 105 dev2udev(dev), flag, otyp, procp); |
| 106 memset(&buf, '\0', 513); 107 len = 0; |
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| 98 return (0); 99} 100 101int 102mydev_close(dev_t dev, int flag, int otyp, struct proc *procp) 103{ 104 printf("mydev_close: dev_t=%d, flag=%x, otyp=%x, procp=%p\n", 105 dev2udev(dev), flag, otyp, procp); --- 14 unchanged lines hidden (view full) --- 120 break; 121 default: 122 printf("No such ioctl for me!\n"); 123 error = EINVAL; 124 break; 125 } 126 return error; 127} | 108 return (0); 109} 110 111int 112mydev_close(dev_t dev, int flag, int otyp, struct proc *procp) 113{ 114 printf("mydev_close: dev_t=%d, flag=%x, otyp=%x, procp=%p\n", 115 dev2udev(dev), flag, otyp, procp); --- 14 unchanged lines hidden (view full) --- 130 break; 131 default: 132 printf("No such ioctl for me!\n"); 133 error = EINVAL; 134 break; 135 } 136 return error; 137} |
| 138 139/* 140 * mydev_write takes in a character string and saves it 141 * to buf for later accessing. 142 */ 143int 144mydev_write(dev_t dev, struct uio *uio, int ioflag) 145{ 146 int err = 0; 147 148 printf("mydev_write: dev_t=%d, uio=%p, ioflag=%d\n", 149 dev2udev(dev), uio, ioflag); 150 151 err = copyinstr(uio->uio_iov->iov_base, &buf, 512, &len); 152 if (err != 0) { 153 printf("Write to \"cdev\" failed.\n"); 154 } 155 return(err); 156} 157 158/* 159 * The mydev_read function just takes the buf that was saved 160 * via mydev_write() and returns it to userland for 161 * accessing. 162 */ 163int 164mydev_read(dev_t dev, struct uio *uio, int ioflag) 165{ 166 int err = 0; 167 168 printf("mydev_read: dev_t=%d, uio=%p, ioflag=%d\n", 169 dev2udev(dev), uio, ioflag); 170 171 if (len <= 0) { 172 err = -1; 173 } else { /* copy buf to userland */ 174 copystr(&buf, uio->uio_iov->iov_base, 513, &len); 175 } 176 return(err); 177} |
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