1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright 2003 by Sun Microsystems, Inc. All rights reserved. 3*0Sstevel@tonic-gate * Use is subject to license terms. 4*0Sstevel@tonic-gate */ 5*0Sstevel@tonic-gate 6*0Sstevel@tonic-gate #ifndef LINT 7*0Sstevel@tonic-gate static const char rcsid[] = "$Id: writev.c,v 8.6 2003/04/30 05:21:18 marka Exp $"; 8*0Sstevel@tonic-gate #endif 9*0Sstevel@tonic-gate 10*0Sstevel@tonic-gate 11*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 12*0Sstevel@tonic-gate 13*0Sstevel@tonic-gate #include "port_before.h" 14*0Sstevel@tonic-gate 15*0Sstevel@tonic-gate #include <sys/types.h> 16*0Sstevel@tonic-gate #include <sys/uio.h> 17*0Sstevel@tonic-gate #include <sys/stat.h> 18*0Sstevel@tonic-gate #include <sys/socket.h> 19*0Sstevel@tonic-gate 20*0Sstevel@tonic-gate #include "port_after.h" 21*0Sstevel@tonic-gate 22*0Sstevel@tonic-gate #ifndef NEED_WRITEV 23*0Sstevel@tonic-gate int __bindcompat_writev; 24*0Sstevel@tonic-gate #else 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate #ifdef _CRAY 27*0Sstevel@tonic-gate #define OWN_WRITEV 28*0Sstevel@tonic-gate int 29*0Sstevel@tonic-gate __writev(int fd, struct iovec *iov, int iovlen) 30*0Sstevel@tonic-gate { 31*0Sstevel@tonic-gate struct stat statbuf; 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate if (fstat(fd, &statbuf) < 0) 34*0Sstevel@tonic-gate return (-1); 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate /* 37*0Sstevel@tonic-gate * Allow for atomic writes to network. 38*0Sstevel@tonic-gate */ 39*0Sstevel@tonic-gate if (statbuf.st_mode & S_IFSOCK) { 40*0Sstevel@tonic-gate struct msghdr mesg; 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate memset(&mesg, 0, sizeof(mesg)); 43*0Sstevel@tonic-gate mesg.msg_name = 0; 44*0Sstevel@tonic-gate mesg.msg_namelen = 0; 45*0Sstevel@tonic-gate mesg.msg_iov = iov; 46*0Sstevel@tonic-gate mesg.msg_iovlen = iovlen; 47*0Sstevel@tonic-gate mesg.msg_accrights = 0; 48*0Sstevel@tonic-gate mesg.msg_accrightslen = 0; 49*0Sstevel@tonic-gate return (sendmsg(fd, &mesg, 0)); 50*0Sstevel@tonic-gate } else { 51*0Sstevel@tonic-gate struct iovec *tv; 52*0Sstevel@tonic-gate int i, rcode = 0, count = 0; 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate for (i = 0, tv = iov; i <= iovlen; tv++) { 55*0Sstevel@tonic-gate rcode = write(fd, tv->iov_base, tv->iov_len); 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate if (rcode < 0) 58*0Sstevel@tonic-gate break; 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate count += rcode; 61*0Sstevel@tonic-gate } 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate if (count == 0) 64*0Sstevel@tonic-gate return (rcode); 65*0Sstevel@tonic-gate else 66*0Sstevel@tonic-gate return (count); 67*0Sstevel@tonic-gate } 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate #else /*_CRAY*/ 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate int 73*0Sstevel@tonic-gate __writev(fd, vp, vpcount) 74*0Sstevel@tonic-gate int fd; 75*0Sstevel@tonic-gate const struct iovec *vp; 76*0Sstevel@tonic-gate int vpcount; 77*0Sstevel@tonic-gate { 78*0Sstevel@tonic-gate int count = 0; 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate while (vpcount-- > 0) { 81*0Sstevel@tonic-gate int written = write(fd, vp->iov_base, vp->iov_len); 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate if (written < 0) 84*0Sstevel@tonic-gate return (-1); 85*0Sstevel@tonic-gate count += written; 86*0Sstevel@tonic-gate if (written != vp->iov_len) 87*0Sstevel@tonic-gate break; 88*0Sstevel@tonic-gate vp++; 89*0Sstevel@tonic-gate } 90*0Sstevel@tonic-gate return (count); 91*0Sstevel@tonic-gate } 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate #endif /*_CRAY*/ 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate #endif /*NEED_WRITEV*/ 96