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/*
* @(#)dir.c 1.4 87/11/06 Public Domain.
*
* A public domain implementation of BSD directory routines for
* MS-DOS. Written by Michael Rendell ({uunet,utai}michael@garfield),
* August 1897
* Ported to OS/2 by Kai Uwe Rommel
* December 1989, February 1990
* Change for HPFS support, October 1990
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/dir.h>
#include <stdlib.h>
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <ctype.h>
#define INCL_NOPM
#include <os2.h>
int attributes = A_DIR | A_HIDDEN;
static char *getdirent(char *);
static void free_dircontents(struct _dircontents *);
static HDIR hdir;
static USHORT count;
static FILEFINDBUF find;
static BOOL lower;
DIR *opendir(char *name)
{
struct stat statb;
DIR *dirp;
char c;
char *s;
struct _dircontents *dp;
char nbuf[MAXPATHLEN + 1];
strcpy(nbuf, name);
if ( ((c = nbuf[strlen(nbuf) - 1]) == '\\' || c == '/') &&
(strlen(nbuf) > 1) )
{
nbuf[strlen(nbuf) - 1] = 0;
if ( nbuf[strlen(nbuf) - 1] == ':' )
strcat(nbuf, "\\.");
}
else
if ( nbuf[strlen(nbuf) - 1] == ':' )
strcat(nbuf, ".");
if (stat(nbuf, &statb) < 0 || (statb.st_mode & S_IFMT) != S_IFDIR)
return NULL;
if ( (dirp = malloc(sizeof(DIR))) == NULL )
return NULL;
if ( nbuf[strlen(nbuf) - 1] == '.' )
strcpy(nbuf + strlen(nbuf) - 1, "*.*");
else
if ( ((c = nbuf[strlen(nbuf) - 1]) == '\\' || c == '/') &&
(strlen(nbuf) == 1) )
strcat(nbuf, "*.*");
else
strcat(nbuf, "\\*.*");
dirp -> dd_loc = 0;
dirp -> dd_contents = dirp -> dd_cp = NULL;
if ((s = getdirent(nbuf)) == NULL)
return dirp;
do
{
if (((dp = malloc(sizeof(struct _dircontents))) == NULL) ||
((dp -> _d_entry = malloc(strlen(s) + 1)) == NULL) )
{
if (dp)
free(dp);
free_dircontents(dirp -> dd_contents);
return NULL;
}
if (dirp -> dd_contents)
dirp -> dd_cp = dirp -> dd_cp -> _d_next = dp;
else
dirp -> dd_contents = dirp -> dd_cp = dp;
strcpy(dp -> _d_entry, s);
dp -> _d_next = NULL;
dp -> _d_size = find.cbFile;
dp -> _d_mode = find.attrFile;
dp -> _d_time = *(unsigned *) &(find.ftimeLastWrite);
dp -> _d_date = *(unsigned *) &(find.fdateLastWrite);
}
while ((s = getdirent(NULL)) != NULL);
dirp -> dd_cp = dirp -> dd_contents;
return dirp;
}
void closedir(DIR * dirp)
{
free_dircontents(dirp -> dd_contents);
free(dirp);
}
struct direct *readdir(DIR * dirp)
{
static struct direct dp;
if (dirp -> dd_cp == NULL)
return NULL;
dp.d_namlen = dp.d_reclen =
strlen(strcpy(dp.d_name, dirp -> dd_cp -> _d_entry));
dp.d_ino = 0;
dp.d_size = dirp -> dd_cp -> _d_size;
dp.d_mode = dirp -> dd_cp -> _d_mode;
dp.d_time = dirp -> dd_cp -> _d_time;
dp.d_date = dirp -> dd_cp -> _d_date;
dirp -> dd_cp = dirp -> dd_cp -> _d_next;
dirp -> dd_loc++;
return &dp;
}
void seekdir(DIR * dirp, long off)
{
long i = off;
struct _dircontents *dp;
if (off >= 0)
{
for (dp = dirp -> dd_contents; --i >= 0 && dp; dp = dp -> _d_next);
dirp -> dd_loc = off - (i + 1);
dirp -> dd_cp = dp;
}
}
long telldir(DIR * dirp)
{
return dirp -> dd_loc;
}
static void free_dircontents(struct _dircontents * dp)
{
struct _dircontents *odp;
while (dp)
{
if (dp -> _d_entry)
free(dp -> _d_entry);
dp = (odp = dp) -> _d_next;
free(odp);
}
}
static int IsFileSystemFAT(char *dir)
{
USHORT nDrive;
ULONG lMap;
BYTE bData[64], bName[3];
USHORT cbData;
if ( _osmode == DOS_MODE )
return TRUE;
else
{
/* We separate FAT and HPFS file systems here.
* Filenames read from a FAT system are converted to lower case
* while the case of filenames read from a HPFS (and other future
* file systems, like Unix-compatibles) is preserved.
*/
if ( isalpha(dir[0]) && (dir[1] == ':') )
nDrive = toupper(dir[0]) - '@';
else
DosQCurDisk(&nDrive, &lMap);
bName[0] = (char) (nDrive + '@');
bName[1] = ':';
bName[2] = 0;
cbData = sizeof(bData);
if ( !DosQFSAttach(bName, 0U, 1U, bData, &cbData, 0L) )
return !strcmp(bData + (*(USHORT *) (bData + 2) + 7), "FAT");
else
return FALSE;
/* End of this ugly code */
}
}
static char *getdirent(char *dir)
{
int done;
if (dir != NULL)
{ /* get first entry */
lower = IsFileSystemFAT(dir);
hdir = HDIR_CREATE;
count = 1;
done = DosFindFirst(dir, &hdir, attributes,
&find, sizeof(find), &count, 0L);
}
else /* get next entry */
done = DosFindNext(hdir, &find, sizeof(find), &count);
if ( lower )
strlwr(find.achName);
if (done == 0)
return find.achName;
else
{
DosFindClose(hdir);
return NULL;
}
}
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