diff options
Diffstat (limited to 'lib/roken/readv.c')
| -rw-r--r-- | lib/roken/readv.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/lib/roken/readv.c b/lib/roken/readv.c new file mode 100644 index 000000000000..b49890ebd6ed --- /dev/null +++ b/lib/roken/readv.c @@ -0,0 +1,67 @@ +/* + * Copyright (c) 1995, 1996, 1997, 1998, 1999 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. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +RCSID("$Id: readv.c 14773 2005-04-12 11:29:18Z lha $"); +#endif + +#include "roken.h" + +ssize_t ROKEN_LIB_FUNCTION +readv(int d, const struct iovec *iov, int iovcnt) +{ + ssize_t ret, nb; + size_t tot = 0; + int i; + char *buf, *p; + + for(i = 0; i < iovcnt; ++i) + tot += iov[i].iov_len; + buf = malloc(tot); + if (tot != 0 && buf == NULL) { + errno = ENOMEM; + return -1; + } + nb = ret = read (d, buf, tot); + p = buf; + while (nb > 0) { + ssize_t cnt = min(nb, iov->iov_len); + + memcpy (iov->iov_base, p, cnt); + p += cnt; + nb -= cnt; + } + free(buf); + return ret; +} |