?? writev.c
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#ifndef LINTstatic const char rcsid[] = "$Id: writev.c,v 1.1.2.1 2003/06/27 03:51:35 marka Exp $";#endif#include "port_before.h"#include <sys/types.h>#include <sys/uio.h>#include <sys/stat.h>#include <sys/socket.h>#include "port_after.h"#ifndef NEED_WRITEVint __bindcompat_writev;#else#ifdef _CRAY#define OWN_WRITEVint__writev(int fd, struct iovec *iov, int iovlen){ struct stat statbuf; if (fstat(fd, &statbuf) < 0) return (-1); /* * Allow for atomic writes to network. */ if (statbuf.st_mode & S_IFSOCK) { struct msghdr mesg; memset(&mesg, 0, sizeof(mesg)); mesg.msg_name = 0; mesg.msg_namelen = 0; mesg.msg_iov = iov; mesg.msg_iovlen = iovlen; mesg.msg_accrights = 0; mesg.msg_accrightslen = 0; return (sendmsg(fd, &mesg, 0)); } else { struct iovec *tv; int i, rcode = 0, count = 0; for (i = 0, tv = iov; i <= iovlen; tv++) { rcode = write(fd, tv->iov_base, tv->iov_len); if (rcode < 0) break; count += rcode; } if (count == 0) return (rcode); else return (count); }}#else /*_CRAY*/int__writev(fd, vp, vpcount) int fd; const struct iovec *vp; int vpcount;{ int count = 0; while (vpcount-- > 0) { int written = write(fd, vp->iov_base, vp->iov_len); if (written < 0) return (-1); count += written; if (written != vp->iov_len) break; vp++; } return (count);}#endif /*_CRAY*/#endif /*NEED_WRITEV*/?? 快捷鍵說明
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