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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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unixSyscall
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fcntl.c
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1992-01-11
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/*
* fcntl.c --
*
* Procedure to map the Unix fcntl system call to Sprite.
*
* Copyright 1986 Regents of the University of California
* All rights reserved.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/unixSyscall/RCS/fcntl.c,v 1.3 88/07/29 18:39:23 ouster Exp $ SPRITE (Berkeley)";
#endif not lint
#include "sprite.h"
#include "fs.h"
#include "compatInt.h"
#include <fcntl.h>
#include <stdio.h>
/*
*----------------------------------------------------------------------
*
* fcntl --
*
* Procedure to map from Unix fcntl system call to Sprite Fs_IOControl.
*
* Results:
* a value depending on the command, or
* UNIX_SUCCESS the call was successful, or
* UNIX_ERROR the call was not successful.
* The actual error code stored in errno.
*
* Side effects:
* Variable.
*
*----------------------------------------------------------------------
*/
int
fcntl(fd, cmd, arg)
int fd; /* File to operate on. */
int cmd; /* Type of command. */
int arg; /* Optional argument to the command. */
{
ReturnStatus status;
int value;
switch (cmd) {
case F_DUPFD:
status = Fs_GetNewID(fd, &arg);
value = arg;
break;
case F_GETFD:
status = Fs_IOControl(fd, IOC_GET_FLAGS,
0, (Address) NULL,
sizeof(value), (Address) &value);
value = (value & IOC_CLOSE_ON_EXEC) ? 1 : 0;
break;
case F_SETFD:
value = IOC_CLOSE_ON_EXEC;
if (arg & 1) {
status = Fs_IOControl(fd, IOC_SET_BITS,
sizeof(value), (Address) &value,
0, (Address) NULL);
} else {
status = Fs_IOControl(fd, IOC_CLEAR_BITS,
sizeof(value), (Address) &value,
0, (Address) NULL);
}
value = UNIX_SUCCESS;
break;
case F_GETFL: {
int temp;
status = Fs_IOControl(fd, IOC_GET_FLAGS,
0, (Address) NULL,
sizeof(temp), (Address) &temp);
value = 0;
if (temp & IOC_APPEND) {
value |= FAPPEND;
}
if (temp & IOC_NON_BLOCKING) {
value |= FNDELAY;
}
if (temp & IOC_ASYNCHRONOUS) {
value |= FASYNC;
}
}
break;
case F_SETFL:
value = 0;
if (arg & FAPPEND) {
value |= IOC_APPEND;
}
if (arg & FNDELAY) {
value |= IOC_NON_BLOCKING;
}
if (arg & FASYNC) {
value |= IOC_ASYNCHRONOUS;
}
if (value == 0) {
status = SUCCESS;
} else {
status = Fs_IOControl(fd, IOC_SET_BITS,
sizeof(value), (Address) &value,
0, (Address) NULL);
}
value = UNIX_SUCCESS;
break;
case F_GETOWN: {
Ioc_Owner owner;
status = Fs_IOControl(fd, IOC_GET_OWNER,
0, (Address) NULL,
sizeof(owner), (Address) &owner);
if (owner.procOrFamily == IOC_OWNER_FAMILY) {
value = -owner.id;
} else {
value = owner.id;
}
}
break;
case F_SETOWN: {
Ioc_Owner owner;
if (arg < 0) {
owner.id = -arg;
owner.procOrFamily = IOC_OWNER_FAMILY;
} else {
owner.id = arg;
owner.procOrFamily = IOC_OWNER_PROC;
}
status = Fs_IOControl(fd, IOC_SET_OWNER,
sizeof(owner), (Address) &owner,
0, (Address) NULL);
value = UNIX_SUCCESS;
}
break;
default:
break;
}
if (status != SUCCESS) {
errno = Compat_MapCode(status);
return(UNIX_ERROR);
}
return(value);
}