87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/*
|
|
* $QNXLicenseC:
|
|
* Copyright 2007, QNX Software Systems. All Rights Reserved.
|
|
*
|
|
* You must obtain a written license from and pay applicable license fees to QNX
|
|
* Software Systems before you may reproduce, modify or distribute this software,
|
|
* or any work that includes all or part of this software. Free development
|
|
* licenses are available for evaluation and non-commercial purposes. For more
|
|
* information visit http://licensing.qnx.com or email licensing@qnx.com.
|
|
*
|
|
* This file may contain contributions from others. Please review this entire
|
|
* file for other proprietary rights or license notices, as well as the QNX
|
|
* Development Suite License Guide at http://licensing.qnx.com/license-guide/
|
|
* for other information.
|
|
* $
|
|
*/
|
|
|
|
|
|
|
|
|
|
#define _FILE_OFFSET_BITS 64
|
|
#define _IOFUNC_OFFSET_BITS 64
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <sys/iofunc.h>
|
|
#include "iofunc.h"
|
|
|
|
int iofunc_write_verify(resmgr_context_t *ctp, io_write_t *msg, iofunc_ocb_t *ocb, int *nonblock) {
|
|
iofunc_attr_t *attr;
|
|
|
|
if((ocb->ioflag & _IO_FLAG_WR) == 0) {
|
|
return EBADF;
|
|
}
|
|
|
|
attr = ocb->attr;
|
|
|
|
// read-only attribute may have been set since open() verifications
|
|
if(attr->mount && (attr->mount->flags & _MOUNT_READONLY)) {
|
|
return EROFS;
|
|
}
|
|
|
|
// write is not allowed on directories (checked in iofunc_open)
|
|
if(S_ISDIR(attr->mode)) {
|
|
return EISDIR;
|
|
}
|
|
|
|
if (IS32BIT(attr, ocb->ioflag) && S_ISREG(attr->mode) && msg->i.nbytes != 0) {
|
|
off64_t off;
|
|
|
|
off = ((msg->i.xtype & _IO_XTYPE_MASK) == _IO_XTYPE_OFFSET) ? ((struct _xtype_offset *)(&msg->i + 1))->offset : (ocb->ioflag & O_APPEND) ? ocb->attr->nbytes : ocb->offset;
|
|
if (off >= LONG_MAX)
|
|
return(EFBIG);
|
|
if (off + msg->i.nbytes > LONG_MAX)
|
|
msg->i.nbytes = LONG_MAX - off;
|
|
}
|
|
|
|
// knock down set-id-bits if executable and writing more than 0 bytes
|
|
if((attr->mode & (S_ISUID | S_ISGID | S_ISVTX)) && msg->i.nbytes && (attr->mode & (S_IXUSR | S_IXGRP | S_IXOTH))) {
|
|
int status;
|
|
struct _client_info info;
|
|
|
|
// Get the client credentials
|
|
if((status = iofunc_client_info(ctp, ocb->ioflag, &info)) != EOK) {
|
|
return status;
|
|
}
|
|
|
|
// Check for owner or appropriate privileges
|
|
if((status = iofunc_check_access(ctp, attr, 0, &info)) != EOK) {
|
|
attr->mode &= ~(S_ISUID | S_ISGID | S_ISVTX);
|
|
attr->flags |= IOFUNC_ATTR_DIRTY_MODE;
|
|
}
|
|
}
|
|
|
|
if((ocb->ioflag & O_APPEND) && msg->i.nbytes != 0 && (msg->i.xtype & _IO_XTYPE_MASK) != _IO_XTYPE_OFFSET) {
|
|
ocb->offset = ocb->attr->nbytes;
|
|
}
|
|
|
|
if(nonblock) {
|
|
*nonblock = _iofunc_isnonblock(ocb->ioflag, msg->i.xtype);
|
|
}
|
|
|
|
return EOK;
|
|
}
|
|
|
|
__SRCVERSION("iofunc_write_verify.c $Rev: 153052 $");
|