77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
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* $QNXLicenseC:
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* Copyright 2007, QNX Software Systems. All Rights Reserved.
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*
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* You must obtain a written license from and pay applicable license fees to QNX
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* Software Systems before you may reproduce, modify or distribute this software,
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* or any work that includes all or part of this software. Free development
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* licenses are available for evaluation and non-commercial purposes. For more
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* information visit http://licensing.qnx.com or email licensing@qnx.com.
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*
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* This file may contain contributions from others. Please review this entire
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* file for other proprietary rights or license notices, as well as the QNX
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* Development Suite License Guide at http://licensing.qnx.com/license-guide/
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* for other information.
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* $
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/iofunc.h>
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#include <sys/dcmd_all.h>
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int iofunc_devctl(resmgr_context_t *ctp, io_devctl_t *msg, iofunc_ocb_t *ocb, iofunc_attr_t *attr) {
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union {
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int oflag;
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int mountflag;
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} *data = (void *)(msg + 1);
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unsigned nbytes = 0;
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switch((unsigned)msg->i.dcmd) {
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case DCMD_ALL_GETFLAGS:
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data->oflag = (ocb->ioflag & O_SETFLAG) | ((ocb->ioflag - 1) & O_ACCMODE);
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nbytes = sizeof data->oflag;
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break;
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case DCMD_ALL_SETFLAGS:
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if(data->oflag & (O_SYNC | O_DSYNC | O_RSYNC)) {
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iofunc_mount_t *mountp = attr->mount;
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if(!mountp || (mountp->conf & IOFUNC_PC_SYNC_IO) == 0) {
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return EINVAL;
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}
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}
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ocb->ioflag = (ocb->ioflag & ~O_SETFLAG) | (data->oflag & O_SETFLAG);
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break;
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case DCMD_ALL_GETMOUNTFLAGS: {
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iofunc_mount_t *mountp = attr->mount;
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data->mountflag = mountp ? (mountp->flags & IOFUNC_MOUNT_FLAGS) : 0;
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nbytes = sizeof data->mountflag;
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break;
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}
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case DCMD_ALL_FADVISE:
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if(S_ISFIFO(attr->mode)) {
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return ESPIPE;
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}
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return _RESMGR_DEFAULT;
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default:
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return _RESMGR_DEFAULT;
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}
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if(nbytes) {
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msg->o.ret_val = 0;
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return _RESMGR_PTR(ctp, &msg->o, sizeof msg->o + nbytes);
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}
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return EOK;
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}
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__SRCVERSION("iofunc_devctl.c $Rev: 153052 $");
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