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Hash: SHA1
Hi
I have tried to compile the echo psuedo-driver written by Murray Stokeley
under 5.X, first i compared it with the dev/null src in the src tree and
found that the cdevsw where defined in a little different way.
But i cannot find where in the there is some thign wrong this is the
make output
<insert>
[EMAIL PROTECTED]:/root/c/echo# make
Warning: Object directory not changed from original /root/c/echo
cc -O -pipe -mcpu=pentiumpro -D_KERNEL -Wall -Wredundant-decls
- -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
- -Winline -Wcast-qual -fformat-extensions -std=c99 -DKLD_MODULE -nostdinc
- -I- -I. -I@ -I@/dev -I@/../include -fno-common -mno-align-long-strings
- -mpreferred-stack-boundary=2 -ffreestanding -Wall -Wredundant-decls
- -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
- -Winline -Wcast-qual -fformat-extensions -std=c99 -c echobuffer.c
echobuffer.c:91: conflicting types for `echo_open'
echobuffer.c:24: previous declaration of `echo_open'
echobuffer.c:100: conflicting types for `echo_close'
echobuffer.c:25: previous declaration of `echo_close'
echobuffer.c:48: warning: `len' defined but not used
*** Error code 1
</insert>
the .c file is attached.
Best regards Søren.
*----------------------------------------------------------------*
| Soeren Straarup Mobile: +45 20 27 62 44 |
| FreeBSD wannabe since 2.2.6-R http://xforce.dk |
| Also running OpenBSD and NetBSD aka OZ2DAK aka Xride |
*----------------------------------------------------------------*
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/*
* Simple `echo' pseudo-device KLD
*
* Murray Stokely
*/
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h> /* uprintf */
#include <sys/errno.h>
#include <sys/param.h> /* defines used in kernel.h */
#include <sys/kernel.h> /* types used in module initialization */
#include <sys/conf.h> /* cdevsw struct */
#include <sys/uio.h> /* uio struct */
#include <sys/malloc.h>
#define BUFFERSIZE 256
#define CDEV_MAJOR 33
#define NULL_MINOR 33
/* Function prototypes */
static d_open_t echo_open;
static d_close_t echo_close;
static d_read_t echo_read;
static d_write_t echo_write;
/* Character device entry points */
static struct cdevsw echo_cdevsw = {
.d_open = echo_open,
.d_close = echo_close,
.d_maj = CDEV_MAJOR,
.d_name = "echo",
.d_read = echo_read,
.d_write = echo_write
};
typedef struct s_echo {
char msg[BUFFERSIZE];
int len;
} t_echo;
/* vars */
static dev_t echo_dev;
static int count;
static t_echo *echomsg;
static int len;
MALLOC_DECLARE(M_ECHOBUF);
MALLOC_DEFINE(M_ECHOBUF, "echobuffer", "buffer for echo module");
/*
* This function acts is called by the kld[un]load(2) system calls to
* determine what actions to take when a module is loaded or unloaded.
*/
static int
echo_loader(struct module *m, int what, void *arg)
{
int err = 0;
switch (what) {
case MOD_LOAD: /* kldload */
echo_dev = make_dev(&echo_cdevsw,
0,
UID_ROOT,
GID_WHEEL,
0600,
"echo");
/* kmalloc memory for use by this driver */
/* malloc(256,M_ECHOBUF,M_WAITOK); */
MALLOC(echomsg, t_echo *, sizeof(t_echo), M_ECHOBUF, M_WAITOK);
printf("Echo device loaded.\n");
break;
case MOD_UNLOAD:
destroy_dev(echo_dev);
FREE(echomsg,M_ECHOBUF);
printf("Echo device unloaded.\n");
break;
default:
err = EINVAL;
break;
}
return(err);
}
static int
echo_open(dev_t dev, int oflags, int devtype, struct proc *p)
{
int err = 0;
uprintf("Opened device \"echo\" successfully.\n");
return(err);
}
static int
echo_close(dev_t dev, int fflag, int devtype, struct proc *p)
{
uprintf("Closing device \"echo.\"\n");
return(0);
}
/*
* The read function just takes the buf that was saved via
* echo_write() and returns it to userland for accessing.
* uio(9)
*/
static int
echo_read(dev_t dev, struct uio *uio, int ioflag)
{
int err = 0;
int amt;
/* How big is this read operation? Either as big as the user wants,
or as big as the remaining data */
amt = MIN(uio->uio_resid, (echomsg->len - uio->uio_offset > 0) ? echomsg->len -
uio->uio_offset : 0);
if ((err = uiomove(echomsg->msg + uio->uio_offset,amt,uio)) != 0) {
uprintf("uiomove failed!\n");
}
return err;
}
/*
* echo_write takes in a character string and saves it
* to buf for later accessing.
*/
static int
echo_write(dev_t dev, struct uio *uio, int ioflag)
{
int err = 0;
/* Copy the string in from user memory to kernel memory */
err = copyin(uio->uio_iov->iov_base, echomsg->msg,
MIN(uio->uio_iov->iov_len,BUFFERSIZE));
/* Now we need to null terminate */
*(echomsg->msg + MIN(uio->uio_iov->iov_len,BUFFERSIZE)) = 0;
/* Record the length */
echomsg->len = MIN(uio->uio_iov->iov_len,BUFFERSIZE);
if (err != 0) {
uprintf("Write failed: bad address!\n");
}
count++;
return(err);
}
DEV_MODULE(echo,echo_loader,NULL);
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