77 lines
1.4 KiB
C++
77 lines
1.4 KiB
C++
#include <bits/getdents.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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extern "C"
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{
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DIR* opendir(const char* path)
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{
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DIR* dp = (DIR*)malloc(sizeof(DIR));
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if (!dp) { return nullptr; }
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int fd = open(path, O_RDONLY | O_DIRECTORY);
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if (fd < 0)
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{
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free(dp);
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return nullptr;
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}
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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dp->_fd = fd;
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return dp;
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}
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DIR* fdopendir(int fd)
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{
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DIR* dp = (DIR*)malloc(sizeof(DIR));
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if (!dp) { return nullptr; }
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dp->_fd = fd;
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return dp;
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}
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struct dirent* readdir(DIR* stream)
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{
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// FIXME: Very hackish, right now luna_dirent and dirent have the same layout.
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static luna_dirent ent;
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long rc = syscall(SYS_getdents, stream->_fd, &ent, 1);
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if (rc < 0)
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{
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errno = (int)-rc;
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return nullptr;
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}
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// End-of-file (no more directory entries)
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if (rc < 1) return nullptr;
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return (struct dirent*)&ent;
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}
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int closedir(DIR* stream)
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{
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if (close(stream->_fd) < 0) return -1;
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free(stream);
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return 0;
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}
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int dirfd(DIR* stream)
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{
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return stream->_fd;
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}
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void rewinddir(DIR* stream)
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{
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lseek(stream->_fd, 0, SEEK_SET);
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}
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}
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