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syscall.c:

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- added readv (untested) and writev (tested)
This commit is contained in:
gdr-ftp 1998-06-24 04:22:38 +00:00
parent b7010abc60
commit afc1676d9f
1 changed files with 81 additions and 1 deletions
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82
lib/libc/sys/syscall.c
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@ -9,7 +9,7 @@
* Unless otherwise specified, see the respective man pages for details
* about these routines.
*
* $Id: syscall.c,v 1.6 1997/12/21 20:13:19 gdr Exp $
* $Id: syscall.c,v 1.7 1998/06/24 04:22:38 gdr-ftp Exp $
*
* This file is formatted with tab stops every 3 columns.
*/
@ -31,6 +31,7 @@ segment "libc_sys__";
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <types.h>
#include <stdlib.h>
@ -780,6 +781,46 @@ read (int filds, void *buf, size_t bytecount) {
return result;
}
/*
* readv
*
* HACK ALERT: This won't work right for packet based sockets.
*/
ssize_t
readv (int fd, const struct iovec *datavec, int count) {
IORecGS iorec = { 4, fd, NULL, 0L, 0L };
int n, err;
size_t i, iov_len;
char *p, *iov_base;
ssize_t transferCount;
transferCount = 0;
for (n=0; n<count; n++) {
iov_base = iorec.dataBuffer = datavec[n].iov_base;
iorec.requestCount = datavec[n].iov_len;
/* write the file block */
ReadGS(&iorec);
if (err = _mapErr(_toolErr)) {
errno = err;
return -1;
}
iov_len = (ssize_t) iorec.transferCount;
transferCount += iov_len;
/* translate newlines if necessary */
if (_getFdTranslation(fd)) {
p = iov_base;
for (i = 0; i < iov_len; i++, p++) {
if (*p == '\r') {
*p = '\n';
}
}
}
}
return transferCount;
}
/*
* rename
*/
@ -1252,6 +1293,45 @@ write(int filds, void *buf, size_t bytecount) {
return (size_t) iorec.transferCount;
}
/*
* writev
*
* HACK ALERT: This won't work right for packet based sockets.
*/
ssize_t
writev (int fd, const struct iovec *datavec, int count) {
IORecGS iorec = { 4, fd, NULL, 0L, 0L };
int n, err;
size_t i, iov_len;
char *p, *iov_base;
ssize_t transferCount;
transferCount = 0;
for (n=0; n<count; n++) {
iov_base = iorec.dataBuffer = datavec[n].iov_base;
iov_len = iorec.requestCount = datavec[n].iov_len;
/* translate newlines if necessary */
if (_getFdTranslation(fd)) {
p = iov_base;
for (i = 0; i < iov_len; i++, p++) {
if (*p == '\n') {
*p = '\r';
}
}
}
/* write the file block */
WriteGS(&iorec);
if (err = _mapErr(_toolErr)) {
errno = err;
return -1;
}
transferCount += (ssize_t) iorec.transferCount;
}
return transferCount;
}
#pragma optimize 78
#pragma debug 0