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// $Id: Rw11VirtDiskFile.cpp 509 2013-04-21 20:46:20Z mueller $
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// $Id: Rw11VirtDiskFile.cpp 516 2013-05-05 21:24:52Z mueller $
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//
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//
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// Copyright 2013- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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// Copyright 2013- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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//
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//
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// This program is free software; you may redistribute and/or modify it under
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// This program is free software; you may redistribute and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// the terms of the GNU General Public License as published by the Free
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// 2013-02-13 488 0.1 First draft
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// 2013-02-13 488 0.1 First draft
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// ---------------------------------------------------------------------------
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// ---------------------------------------------------------------------------
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/*!
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/*!
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\file
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\file
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\version $Id: Rw11VirtDiskFile.cpp 509 2013-04-21 20:46:20Z mueller $
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\version $Id: Rw11VirtDiskFile.cpp 516 2013-05-05 21:24:52Z mueller $
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\brief Implemenation of Rw11VirtDiskFile.
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\brief Implemenation of Rw11VirtDiskFile.
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*/
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*/
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#include <sys/types.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/stat.h>
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bool wpro = fUrl.FindOpt("wpro");
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bool wpro = fUrl.FindOpt("wpro");
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int fd = ::open(fUrl.Path().c_str(), wpro ? O_RDONLY : O_RDWR);
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int fd = ::open(fUrl.Path().c_str(), wpro ? O_RDONLY : O_RDWR);
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if (fd < 0) {
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if (fd < 0) {
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emsg.InitErrno("Rw11VirtDiskFile::Open()",
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emsg.InitErrno("Rw11VirtDiskFile::Open()",
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string("open() for '") + fUrl.Path() + string("' failed: "),
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string("open() for '") + fUrl.Path() + "' failed: ", errno);
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errno);
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return false;
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return false;
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}
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}
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struct stat sbuf;
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struct stat sbuf;
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if (::fstat(fd, &sbuf) < 0) {
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if (::fstat(fd, &sbuf) < 0) {
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emsg.InitErrno("Rw11VirtDiskFile::Open()",
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emsg.InitErrno("Rw11VirtDiskFile::Open()",
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string("stat() for '") + fUrl.Path() + string("' failed: "),
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string("stat() for '") + fUrl.Path() + "' failed: ", errno);
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errno);
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return false;
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return false;
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}
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}
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fFd = fd;
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fFd = fd;
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fSize = sbuf.st_size;
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fSize = sbuf.st_size;
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if (!Seek(seekpos, emsg)) return false;
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if (!Seek(seekpos, emsg)) return false;
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ssize_t irc = ::write(fFd, data, nbyt);
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ssize_t irc = ::write(fFd, data, nbyt);
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if (irc < ssize_t(nbyt)) {
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if (irc < ssize_t(nbyt)) {
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emsg.InitErrno("Rw11VirtDiskFile::Write()", string("write() failed: "),
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emsg.InitErrno("Rw11VirtDiskFile::Write()", "write() failed: ", errno);
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errno);
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return false;
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return false;
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}
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}
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if (seekpos+nbyt > fSize) fSize = seekpos+nbyt;
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if (seekpos+nbyt > fSize) fSize = seekpos+nbyt;
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//! FIXME_docs
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//! FIXME_docs
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bool Rw11VirtDiskFile::Seek(size_t seekpos, RerrMsg& emsg)
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bool Rw11VirtDiskFile::Seek(size_t seekpos, RerrMsg& emsg)
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{
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{
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if (::lseek(fFd, seekpos, SEEK_SET) < 0) {
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if (::lseek(fFd, seekpos, SEEK_SET) < 0) {
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emsg.InitErrno("Rw11VirtDiskFile::Seek()", string("seek() failed: "),
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emsg.InitErrno("Rw11VirtDiskFile::Seek()", "seek() failed: ", errno);
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errno);
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return false;
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return false;
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}
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}
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return true;
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return true;
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}
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}
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