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Sprite 1984 - 1993
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Sprite 1984 - 1993.iso
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unixSyscall
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RCS
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readv.c,v
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1991-12-10
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3KB
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134 lines
head 1.2;
branch ;
access ;
symbols sprited:1.2.1;
locks ; strict;
comment @ * @;
1.2
date 90.08.15.15.25.11; author kupfer; state Exp;
branches 1.2.1.1;
next 1.1;
1.1
date 88.06.19.14.31.53; author ouster; state Exp;
branches ;
next ;
1.2.1.1
date 91.12.10.16.04.31; author kupfer; state Exp;
branches ;
next ;
desc
@@
1.2
log
@Partial success is okay. Don't return an error code unless we couldn't
read any bytes at all.
@
text
@/*
* readv.c --
*
* Procedure to map from Unix readv 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/readv.c,v 1.1 88/06/19 14:31:53 ouster Exp Locker: kupfer $ SPRITE (Berkeley)";
#endif not lint
#include "sprite.h"
#include "fs.h"
#include "sys.h"
#include "compatInt.h"
#include <sys/types.h>
#include <sys/uio.h>
/*
*----------------------------------------------------------------------
*
* readv --
*
* Procedure to map from Unix readv system call to Sprite Fs_Read.
*
* Results:
* UNIX_ERROR is returned upon error, with the actual error code
* stored in errno. Upon success, the number of bytes actually
* read is returned.
*
* Side effects:
* The buffers are filled with the number of bytes indicated by
* the returned value. (Each buffer has no more bytes than was
* specified by that buffer's length parameter.)
*
*----------------------------------------------------------------------
*/
int
readv(stream, iov, iovcnt)
int stream; /* descriptor for stream to read. */
register struct iovec *iov; /* pointer to array of iovecs. */
int iovcnt; /* number of iovecs in iov. */
{
ReturnStatus status; /* result returned by Fs_Read */
int amountRead; /* place to hold number of bytes read */
int totalRead = 0; /* place to hold total # of bytes written */
int i;
for (i=0; i < iovcnt; i++, iov++) {
status = Fs_Read(stream, iov->iov_len, iov->iov_base,
&amountRead);
if (status != SUCCESS) {
break;
} else {
totalRead += amountRead;
}
}
if (status != SUCCESS && totalRead == 0) {
errno = Compat_MapCode(status);
return(UNIX_ERROR);
} else {
return(totalRead);
}
}
@
1.2.1.1
log
@Initial branch for Sprite server.
@
text
@d11 1
a11 1
static char rcsid[] = "$Header: /sprite/src/lib/c/unixSyscall/RCS/readv.c,v 1.2 90/08/15 15:25:11 kupfer Exp $ SPRITE (Berkeley)";
@
1.1
log
@Initial revision
@
text
@d11 1
a11 1
static char rcsid[] = "$Header: readv.c,v 1.1 87/06/18 18:41:14 andrew Exp $ SPRITE (Berkeley)";
d35 3
a37 2
* The buffer is filled with the number of bytes indicated by
* the length parameter.
d63 1
a63 1
if (status != SUCCESS) {
@