granicus.if.org Git - postgresql/blob - src/port/dirent.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * dirent.c
   4  *        opendir/readdir/closedir for win32/msvc
   5  *
   6  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  *
  10  * IDENTIFICATION
  11  *        $PostgreSQL: pgsql/src/port/dirent.c,v 1.2 2006/06/26 12:58:17 momjian Exp $
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15
  16 #include "postgres.h"
  17 #include <dirent.h>
  18
  19
  20 struct DIR {
  21         char *dirname;
  22         struct dirent ret; /* Used to return to caller */
  23         HANDLE handle;
  24 };
  25
  26 DIR* opendir(const char *dirname)
  27 {
  28         DWORD attr;
  29         DIR *d;
  30
  31         /* Make sure it is a directory */
  32         attr = GetFileAttributes(dirname);
  33         if (attr == INVALID_FILE_ATTRIBUTES)
  34         {
  35                 errno = ENOENT;
  36                 return NULL;
  37         }
  38         if ((attr & FILE_ATTRIBUTE_DIRECTORY) != FILE_ATTRIBUTE_DIRECTORY)
  39         {
  40                 errno = ENOTDIR;
  41                 return NULL;
  42         }
  43
  44         d = malloc(sizeof(DIR));
  45         if (!d)
  46         {
  47                 errno = ENOMEM;
  48                 return NULL;
  49         }
  50         d->dirname = malloc(strlen(dirname)+4);
  51         if (!d->dirname)
  52         {
  53                 errno = ENOMEM;
  54                 free(d);
  55                 return NULL;
  56         }
  57         strcpy(d->dirname, dirname);
  58         if (d->dirname[strlen(d->dirname)-1] != '/' &&
  59             d->dirname[strlen(d->dirname)-1] != '\\')
  60                 strcat(d->dirname,"\\"); /* Append backslash if not already there */
  61         strcat(d->dirname,"*");          /* Search for entries named anything */
  62         d->handle = INVALID_HANDLE_VALUE;
  63         d->ret.d_ino = 0; /* no inodes on win32 */
  64         d->ret.d_reclen =  0; /* not used on win32 */
  65
  66         return d;
  67 }
  68
  69 struct dirent* readdir(DIR * d)
  70 {
  71         WIN32_FIND_DATA fd;
  72
  73         if (d->handle == INVALID_HANDLE_VALUE)
  74         {
  75                 d->handle = FindFirstFile(d->dirname, &fd);
  76                 if (d->handle == INVALID_HANDLE_VALUE)
  77                 {
  78                         errno = ENOENT;
  79                         return NULL;
  80                 }
  81         }
  82         else
  83         {
  84                 if (!FindNextFile(d->handle, &fd))
  85                 {
  86                         if (GetLastError() == ERROR_NO_MORE_FILES)
  87                         {
  88                                 /* No more files, force errno=0 (unlike mingw) */
  89                                 errno = 0;
  90                                 return NULL;
  91                         }
  92                         _dosmaperr(GetLastError());
  93                         return NULL;
  94                 }
  95         }
  96         strcpy(d->ret.d_name, fd.cFileName); /* Both strings are MAX_PATH long */
  97         d->ret.d_namlen = strlen(d->ret.d_name);
  98         return &d->ret;
  99 }
 100
 101 int closedir(DIR *d)
 102 {
 103         if (d->handle != INVALID_HANDLE_VALUE)
 104                 FindClose(d->handle);
 105         free(d->dirname);
 106         free(d);
 107         return 0;
 108 }