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pread/pwrite:

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follow lseek spirit - return EINVAL on negative offset for non-VCHR
This commit is contained in:
ache 2004-01-20 01:27:42 +00:00
parent 16423da82c
commit f8d77065a1
1 changed files with 9 additions and 4 deletions
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13
sys/kern/sys_generic.c
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@ -63,6 +63,7 @@ __FBSDID("$FreeBSD$");
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/vnode.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/condvar.h>
@ -138,9 +139,11 @@ pread(td, uap)
if ((error = fget_read(td, uap->fd, &fp)) != 0)
return (error);
if (!(fp->f_ops->fo_flags & DFLAG_SEEKABLE)) {
if (!(fp->f_ops->fo_flags & DFLAG_SEEKABLE))
error = ESPIPE;
} else {
else if (uap->offset < 0 && fp->f_vnode->v_type != VCHR)
error = EINVAL;
else {
error = dofileread(td, fp, uap->fd, uap->buf, uap->nbyte,
uap->offset, FOF_OFFSET);
}
@ -361,9 +364,11 @@ pwrite(td, uap)
int error;
if ((error = fget_write(td, uap->fd, &fp)) == 0) {
if (!(fp->f_ops->fo_flags & DFLAG_SEEKABLE)) {
if (!(fp->f_ops->fo_flags & DFLAG_SEEKABLE))
error = ESPIPE;
} else {
else if (uap->offset < 0 && fp->f_vnode->v_type != VCHR)
error = EINVAL;
else {
error = dofilewrite(td, fp, uap->fd, uap->buf,
uap->nbyte, uap->offset, FOF_OFFSET);
}