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3c2ac53066
* updating include so that it can compile for vxworks * added macro compilation for vxworks to avoid issues when using statvfs. Also applying formatting * added macro compilation for vxworks to avoid issues when using dup. * Formatting * using modern header include * Adding pound-define code for VxWorks otherwise this does not build when building VxWorks using Posix. Better to do a pound-if here than copying the entire file and deleting a line in the vxworks repo * Adding comment
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
// ======================================================================
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// \title Os/Posix/Directory.cpp
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// \brief Posix implementation for Os::Directory
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// ======================================================================
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#include <sys/stat.h>
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#include <cerrno>
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#include <cstring>
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#include <Fw/Types/Assert.hpp>
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#include <Fw/Types/StringUtils.hpp>
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#include <Os/Posix/Directory.hpp>
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#include <Os/Posix/error.hpp>
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namespace Os {
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namespace Posix {
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namespace Directory {
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PosixDirectory::PosixDirectory() : Os::DirectoryInterface(), m_handle() {}
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DirectoryHandle* PosixDirectory::getHandle() {
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return &this->m_handle;
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}
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PosixDirectory::Status PosixDirectory::open(const char* path, OpenMode mode) {
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Status status = Status::OP_OK;
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// If one of the CREATE mode, attempt to create the directory
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if (mode == OpenMode::CREATE_EXCLUSIVE || mode == OpenMode::CREATE_IF_MISSING) {
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if (::mkdir(path, S_IRWXU) == -1) {
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status = errno_to_directory_status(errno);
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// If error is not ALREADY_EXISTS, return the error
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// If any error and mode CREATE_EXCLUSIVE, return the error
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// Else, we keep going with OP_OK
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if (status != Status::ALREADY_EXISTS || mode == OpenMode::CREATE_EXCLUSIVE) {
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return status;
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} else {
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status = Status::OP_OK;
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}
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}
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}
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DIR* dir = ::opendir(path);
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if (dir == nullptr) {
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status = errno_to_directory_status(errno);
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}
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this->m_handle.m_dir_descriptor = dir;
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return status;
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}
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PosixDirectory::Status PosixDirectory::rewind() {
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Status status = Status::OP_OK;
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// no errors defined in man page for rewinddir
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::rewinddir(this->m_handle.m_dir_descriptor);
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return status;
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}
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PosixDirectory::Status PosixDirectory::read(char* fileNameBuffer, FwSizeType bufSize) {
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FW_ASSERT(fileNameBuffer);
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Status status = Status::OP_OK;
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// Set errno to 0 so we know why we exited readdir
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// This is recommended by the manual pages (man 3 readdir)
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errno = 0;
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struct dirent* direntData = nullptr;
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while ((direntData = ::readdir(this->m_handle.m_dir_descriptor)) != nullptr) {
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// Skip . and .. directory entries
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if ((direntData->d_name[0] == '.' and direntData->d_name[1] == '\0') or
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(direntData->d_name[0] == '.' and direntData->d_name[1] == '.' and direntData->d_name[2] == '\0')) {
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continue;
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} else {
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(void)Fw::StringUtils::string_copy(fileNameBuffer, direntData->d_name, bufSize);
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break;
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}
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}
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if (direntData == nullptr) {
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// loop ended because readdir failed, did it error or did we run out of files?
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if (errno != 0) {
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// Only error from readdir is EBADF
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status = Status::BAD_DESCRIPTOR;
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} else {
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status = Status::NO_MORE_FILES;
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}
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}
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return status;
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}
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void PosixDirectory::close() {
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// ::closedir errors if dir descriptor is nullptr
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if (this->m_handle.m_dir_descriptor != nullptr) {
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(void)::closedir(this->m_handle.m_dir_descriptor);
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}
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this->m_handle.m_dir_descriptor = nullptr;
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}
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} // namespace Directory
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} // namespace Posix
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} // namespace Os
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