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Added ncftp to rosapps

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svn path=/trunk/; revision=2453
This commit is contained in:
Steven Edwards 2001-12-30 06:31:25 +00:00
parent 289a784eef
commit 86bda6b3d9
118 changed files with 38524 additions and 0 deletions
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213
rosapps/net/ncftp/sio/SRead.c Normal file
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#include "syshdrs.h"
static char UNUSED(gSioVersion[]) = "@(#) sio 6.0.3 ** Copyright 1992-2001 Mike Gleason. All rights reserved.";
#ifdef NO_SIGNALS
static char UNUSED(gNoSignalsMarker[]) = "@(#) sio - NO_SIGNALS";
#else
extern volatile Sjmp_buf gNetTimeoutJmp;
extern volatile Sjmp_buf gPipeJmp;
#endif
/* Read up to "size" bytes on sfd before "tlen" seconds.
*
* If "retry" is on, after a successful read of less than "size"
* bytes, it will attempt to read more, upto "size."
*
* If the timer elapses and one or more bytes were read, it returns
* that number, otherwise a timeout error is returned.
*
* Although "retry" would seem to indicate you may want to always
* read "size" bytes or else it is an error, even with that on you
* may get back a value < size. Set "retry" to 0 when you want to
* return as soon as there is a chunk of data whose size is <= "size".
*/
#ifndef NO_SIGNALS
int
SRead(int sfd, char *const buf0, size_t size, int tlen, int retry)
{
int nread;
volatile int nleft;
char *volatile buf = buf0;
int tleft;
vsio_sigproc_t sigalrm, sigpipe;
time_t done, now;
if (SSetjmp(gNetTimeoutJmp) != 0) {
alarm(0);
(void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
nread = size - nleft;
if ((nread > 0) && ((retry & (kFullBufferRequired|kFullBufferRequiredExceptLast)) == 0))
return (nread);
errno = ETIMEDOUT;
return (kTimeoutErr);
}
if (SSetjmp(gPipeJmp) != 0) {
alarm(0);
(void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
nread = size - nleft;
if ((nread > 0) && ((retry & (kFullBufferRequired|kFullBufferRequiredExceptLast)) == 0))
return (nread);
errno = EPIPE;
return (kBrokenPipeErr);
}
sigalrm = (vsio_sigproc_t) SSignal(SIGALRM, SIOHandler);
sigpipe = (vsio_sigproc_t) SSignal(SIGPIPE, SIOHandler);
errno = 0;
nleft = (int) size;
time(&now);
done = now + tlen;
forever {
tleft = (int) (done - now);
if (tleft < 1) {
nread = size - nleft;
if ((nread == 0) || ((retry & (kFullBufferRequired)) != 0)) {
nread = kTimeoutErr;
errno = ETIMEDOUT;
}
goto done;
}
(void) alarm((unsigned int) tleft);
nread = read(sfd, (char *) buf, nleft);
(void) alarm(0);
if (nread <= 0) {
if (nread == 0) {
/* EOF */
if (retry == ((retry & (kFullBufferRequiredExceptLast)) != 0))
nread = size - nleft;
goto done;
} else if (errno != EINTR) {
nread = size - nleft;
if (nread == 0)
nread = -1;
goto done;
} else {
errno = 0;
nread = 0;
/* Try again. */
/* Ignore this line... */
LIBSIO_USE_VAR(gSioVersion);
}
}
nleft -= nread;
if ((nleft <= 0) || (((retry & (kFullBufferRequired|kFullBufferRequiredExceptLast)) == 0) && (nleft != (int) size)))
break;
buf += nread;
time(&now);
}
nread = size - nleft;
done:
(void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
return (nread);
} /* SRead */
#else
int
SRead(int sfd, char *const buf0, size_t size, int tlen, int retry)
{
int nread;
volatile int nleft;
char *buf = buf0;
int tleft;
time_t done, now;
fd_set ss;
struct timeval tv;
int result, firstRead;
errno = 0;
nleft = (int) size;
time(&now);
done = now + tlen;
firstRead = 1;
forever {
tleft = (int) (done - now);
if (tleft < 1) {
nread = size - nleft;
if ((nread == 0) || ((retry & (kFullBufferRequired|kFullBufferRequiredExceptLast)) != 0)) {
nread = kTimeoutErr;
errno = ETIMEDOUT;
SETWSATIMEOUTERR
}
goto done;
}
if (!firstRead || ((retry & kNoFirstSelect) == 0)) {
forever {
errno = 0;
FD_ZERO(&ss);
FD_SET(sfd, &ss);
tv.tv_sec = tlen;
tv.tv_usec = 0;
result = select(sfd + 1, SELECT_TYPE_ARG234 &ss, NULL, NULL, SELECT_TYPE_ARG5 &tv);
if (result == 1) {
/* ready */
break;
} else if (result == 0) {
/* timeout */
nread = size - nleft;
if ((nread > 0) && ((retry & (kFullBufferRequired|kFullBufferRequiredExceptLast)) == 0))
return (nread);
errno = ETIMEDOUT;
SETWSATIMEOUTERR
return (kTimeoutErr);
} else if (errno != EINTR) {
return (-1);
}
}
firstRead = 0;
}
#if defined(WIN32) || defined(_WINDOWS)
nread = recv(sfd, (char *) buf, nleft, 0);
#else
nread = read(sfd, (char *) buf, nleft);
#endif
if (nread <= 0) {
if (nread == 0) {
/* EOF */
if (retry == ((retry & (kFullBufferRequiredExceptLast)) != 0))
nread = size - nleft;
goto done;
} else if (errno != EINTR) {
nread = size - nleft;
if (nread == 0)
nread = -1;
goto done;
} else {
errno = 0;
nread = 0;
/* Try again. */
/* Ignore these two lines */
LIBSIO_USE_VAR(gSioVersion);
LIBSIO_USE_VAR(gNoSignalsMarker);
}
}
nleft -= nread;
if ((nleft <= 0) || (((retry & (kFullBufferRequired|kFullBufferRequiredExceptLast)) == 0) && (nleft != (int) size)))
break;
buf += nread;
time(&now);
}
nread = size - nleft;
done:
return (nread);
} /* SRead */
#endif