138 lines
2.8 KiB
C
138 lines
2.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* dirent.c
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* opendir/readdir/closedir for win32/msvc
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/port/dirent.c
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef FRONTEND
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#include "postgres.h"
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#else
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#include "postgres_fe.h"
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#endif
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#include <dirent.h>
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struct DIR
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{
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char *dirname;
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struct dirent ret; /* Used to return to caller */
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HANDLE handle;
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};
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DIR *
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opendir(const char *dirname)
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{
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DWORD attr;
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DIR *d;
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/* Make sure it is a directory */
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attr = GetFileAttributes(dirname);
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if (attr == INVALID_FILE_ATTRIBUTES)
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{
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errno = ENOENT;
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return NULL;
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}
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if ((attr & FILE_ATTRIBUTE_DIRECTORY) != FILE_ATTRIBUTE_DIRECTORY)
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{
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errno = ENOTDIR;
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return NULL;
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}
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d = malloc(sizeof(DIR));
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if (!d)
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{
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errno = ENOMEM;
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return NULL;
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}
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d->dirname = malloc(strlen(dirname) + 4);
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if (!d->dirname)
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{
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errno = ENOMEM;
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free(d);
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return NULL;
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}
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strcpy(d->dirname, dirname);
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if (d->dirname[strlen(d->dirname) - 1] != '/' &&
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d->dirname[strlen(d->dirname) - 1] != '\\')
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strcat(d->dirname, "\\"); /* Append backslash if not already there */
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strcat(d->dirname, "*"); /* Search for entries named anything */
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d->handle = INVALID_HANDLE_VALUE;
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d->ret.d_ino = 0; /* no inodes on win32 */
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d->ret.d_reclen = 0; /* not used on win32 */
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d->ret.d_type = DT_UNKNOWN;
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return d;
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}
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struct dirent *
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readdir(DIR *d)
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{
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WIN32_FIND_DATA fd;
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if (d->handle == INVALID_HANDLE_VALUE)
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{
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d->handle = FindFirstFile(d->dirname, &fd);
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if (d->handle == INVALID_HANDLE_VALUE)
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{
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/* If there are no files, force errno=0 (unlike mingw) */
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if (GetLastError() == ERROR_FILE_NOT_FOUND)
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errno = 0;
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else
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_dosmaperr(GetLastError());
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return NULL;
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}
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}
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else
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{
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if (!FindNextFile(d->handle, &fd))
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{
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/* If there are no more files, force errno=0 (like mingw) */
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if (GetLastError() == ERROR_NO_MORE_FILES)
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errno = 0;
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else
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_dosmaperr(GetLastError());
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return NULL;
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}
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}
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strcpy(d->ret.d_name, fd.cFileName); /* Both strings are MAX_PATH long */
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d->ret.d_namlen = strlen(d->ret.d_name);
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/*
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* For reparse points dwReserved0 field will contain the ReparseTag. We
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* check this first, because reparse points are also reported as
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* directories.
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*/
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if ((fd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0 &&
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(fd.dwReserved0 == IO_REPARSE_TAG_MOUNT_POINT))
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d->ret.d_type = DT_LNK;
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else if ((fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
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d->ret.d_type = DT_DIR;
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else
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d->ret.d_type = DT_REG;
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return &d->ret;
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}
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int
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closedir(DIR *d)
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{
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int ret = 0;
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if (d->handle != INVALID_HANDLE_VALUE)
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ret = !FindClose(d->handle);
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free(d->dirname);
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free(d);
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return ret;
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}
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