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(#7798) [vcpkg] Fix the build on FreeBSD 😈

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Add a `#else` line to `toolsrc/src/vcpkg/base/files.cpp`. On Linux
and macOS, there are specific ways to copy from file descriptor to file
descriptor, but on FreeBSD there isn't (as far as I could tell). This
change does a copy using the POSIX standard `read` and `write` calls.
(This change was to `RealFilesystem::rename_or_copy`).

We expect to have people on FreeBSD install CMake themselves, and use
`./bootstrap.sh -useSystemBinaries`, in order to build vcpkg.
Since CMake 3.15.2 exists in the FreeBSD 12 (latest stable) package
manager, it's trivial to install it.
This commit is contained in:
Nicole Mazzuca 2019-08-20 18:43:51 -07:00 committed by nicole mazzuca
parent 78abf650e7
commit cc35672763
1 changed files with 29 additions and 3 deletions
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32
toolsrc/src/vcpkg/base/files.cpp
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@ -8,9 +8,8 @@
#include <vcpkg/base/util.h>
#include <vcpkg/base/work_queue.h>
#if defined(__linux__) || defined(__APPLE__)
#if !defined(_WIN32)
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
@ -396,7 +395,7 @@ namespace vcpkg::Files
{
this->rename(oldpath, newpath, ec);
Util::unused(temp_suffix);
#if defined(__linux__) || defined(__APPLE__)
#if !defined(_WIN32)
if (ec)
{
auto dst = newpath;
@ -419,6 +418,33 @@ namespace vcpkg::Files
auto written_bytes = sendfile(o_fd, i_fd, &bytes, info.st_size);
#elif defined(__APPLE__)
auto written_bytes = fcopyfile(i_fd, o_fd, 0, COPYFILE_ALL);
#else
ssize_t written_bytes = 0;
{
constexpr std::size_t buffer_length = 4096;
auto buffer = std::make_unique<unsigned char[]>(buffer_length);
while (auto read_bytes = read(i_fd, buffer.get(), buffer_length))
{
if (read_bytes == -1)
{
written_bytes = -1;
break;
}
auto remaining = read_bytes;
while (remaining > 0) {
auto read_result = write(o_fd, buffer.get(), remaining);
if (read_result == -1)
{
written_bytes = -1;
// break two loops
goto copy_failure;
}
remaining -= read_result;
}
}
copy_failure: ;
}
#endif
if (written_bytes == -1)
{