diff options
Diffstat (limited to 'third_party/heimdal/lib/roken/net_write.c')
| -rw-r--r-- | third_party/heimdal/lib/roken/net_write.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/net_write.c b/third_party/heimdal/lib/roken/net_write.c new file mode 100644 index 0000000..e66f56b --- /dev/null +++ b/third_party/heimdal/lib/roken/net_write.c @@ -0,0 +1,134 @@ +/* + * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <config.h> + +#include "roken.h" + +/* + * Like write but blocking sockets never return partial data, i.e. we retry on + * EINTR. With non-blocking sockets (EWOULDBLOCK or EAGAIN) we return the + * number of bytes written. + */ + +#ifndef _WIN32 + +ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL +net_write (rk_socket_t fd, const void *buf, size_t nbytes) +{ + const char *cbuf = (const char *)buf; + ssize_t count; + size_t rem = nbytes; + + while (rem > 0) { + count = write (fd, cbuf, rem); + if (count < 0) { + switch (errno) { + case EINTR: + continue; +#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK + case EAGAIN: +#endif + case EWOULDBLOCK: + return nbytes - rem; + default: + return count; + } + } + cbuf += count; + rem -= count; + } + return nbytes; +} + +#else /* defined(_WIN32) */ + +ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL +net_write(rk_socket_t sock, const void *buf, size_t nbytes) +{ + const char *cbuf = (const char *)buf; + ssize_t count; + size_t rem = nbytes; +#ifdef SOCKET_IS_NOT_AN_FD + int use_write = 0; +#endif + + while (rem > 0) { +#ifdef SOCKET_IS_NOT_AN_FD + if (use_write) + count = _write (sock, cbuf, rem); + else + count = send (sock, cbuf, rem, 0); + + if (use_write == 0 && + rk_IS_SOCKET_ERROR(count) && + (rk_SOCK_ERRNO == WSANOTINITIALISED || + rk_SOCK_ERRNO == WSAENOTSOCK)) { + use_write = 1; + + count = _write (sock, cbuf, rem); + } +#else + count = send (sock, cbuf, rem, 0); +#endif + if (count < 0) { +#ifdef SOCKET_IS_NOT_AN_FD + if (!use_write) { + switch (rk_SOCK_ERRNO) { + case WSAEINTR: + continue; + case WSAEWOULDBLOCK: + return nbytes - rem; + default: + return count; + } + } else +#endif + { + switch (errno) { + case EINTR: + continue; + case EWOULDBLOCK: + return nbytes - rem; + default: + return count; + } + } + } + cbuf += count; + rem -= count; + } + return nbytes; +} + +#endif |