Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 968 insertions, 0 deletions

diff --git a/nsprpub/pr/src/md/os2/os2io.c b/nsprpub/pr/src/md/os2/os2io.c
new file mode 100644
index 0000000000..639a0d3880
--- /dev/null
+++ b/nsprpub/pr/src/md/os2/os2io.c
@@ -0,0 +1,968 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* OS2 IO module
+ *
+ * Assumes synchronous I/O.
+ *
+ */
+
+#include "primpl.h"
+#include "prio.h"
+#include <ctype.h>
+#include <string.h>
+#include <limits.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <io.h>
+
+struct _MDLock               _pr_ioq_lock;
+
+static PRBool isWSEB = PR_FALSE; /* whether we are using an OS/2 kernel that supports large files */
+
+typedef APIRET (*DosOpenLType)(PSZ pszFileName, PHFILE pHf, PULONG pulAction,
+                               LONGLONG cbFile, ULONG ulAttribute,
+                               ULONG fsOpenFlags, ULONG fsOpenMode,
+                               PEAOP2 peaop2);
+
+typedef APIRET (*DosSetFileLocksLType)(HFILE hFile, PFILELOCKL pflUnlock,
+                                       PFILELOCKL pflLock, ULONG timeout,
+                                       ULONG flags);
+
+typedef APIRET (*DosSetFilePtrLType)(HFILE hFile, LONGLONG ib, ULONG method,
+                                     PLONGLONG ibActual);
+
+DosOpenLType myDosOpenL;
+DosSetFileLocksLType myDosSetFileLocksL;
+DosSetFilePtrLType myDosSetFilePtrL;
+
+void
+_PR_MD_INIT_IO()
+{
+    APIRET rc;
+    HMODULE module;
+
+    sock_init();
+
+    rc = DosLoadModule(NULL, 0, "DOSCALL1", &module);
+    if (rc != NO_ERROR)
+    {
+        return;
+    }
+    rc = DosQueryProcAddr(module, 981, NULL, (PFN*) &myDosOpenL);
+    if (rc != NO_ERROR)
+    {
+        return;
+    }
+    rc = DosQueryProcAddr(module, 986, NULL, (PFN*) &myDosSetFileLocksL);
+    if (rc != NO_ERROR)
+    {
+        return;
+    }
+    rc = DosQueryProcAddr(module, 988, NULL, (PFN*) &myDosSetFilePtrL);
+    if (rc != NO_ERROR)
+    {
+        return;
+    }
+    isWSEB = PR_TRUE;
+}
+
+PRStatus
+_PR_MD_WAIT(PRThread *thread, PRIntervalTime ticks)
+{
+    PRInt32 rv;
+    ULONG count;
+
+    PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ?
+                     SEM_INDEFINITE_WAIT : PR_IntervalToMilliseconds(ticks);
+    rv = DosWaitEventSem(thread->md.blocked_sema, msecs);
+    DosResetEventSem(thread->md.blocked_sema, &count);
+    switch(rv)
+    {
+        case NO_ERROR:
+            return PR_SUCCESS;
+            break;
+        case ERROR_TIMEOUT:
+            _PR_THREAD_LOCK(thread);
+            if (thread->state == _PR_IO_WAIT) {
+                ;
+            } else {
+                if (thread->wait.cvar != NULL) {
+                    thread->wait.cvar = NULL;
+                    _PR_THREAD_UNLOCK(thread);
+                } else {
+                    /* The CVAR was notified just as the timeout
+                     * occurred.  This led to us being notified twice.
+                     * call SemRequest() to clear the semaphore.
+                     */
+                    _PR_THREAD_UNLOCK(thread);
+                    rv = DosWaitEventSem(thread->md.blocked_sema, 0);
+                    DosResetEventSem(thread->md.blocked_sema, &count);
+                    PR_ASSERT(rv == NO_ERROR);
+                }
+            }
+            return PR_SUCCESS;
+            break;
+        default:
+            break;
+    }
+    return PR_FAILURE;
+}
+PRStatus
+_PR_MD_WAKEUP_WAITER(PRThread *thread)
+{
+    if ( _PR_IS_NATIVE_THREAD(thread) )
+    {
+        if (DosPostEventSem(thread->md.blocked_sema) != NO_ERROR) {
+            return PR_FAILURE;
+        }
+        else {
+            return PR_SUCCESS;
+        }
+    }
+}
+
+
+/* --- FILE IO ----------------------------------------------------------- */
+/*
+ *  _PR_MD_OPEN() -- Open a file
+ *
+ *  returns: a fileHandle
+ *
+ *  The NSPR open flags (osflags) are translated into flags for OS/2
+ *
+ *  Mode seems to be passed in as a unix style file permissions argument
+ *  as in 0666, in the case of opening the logFile.
+ *
+ */
+PRInt32
+_PR_MD_OPEN(const char *name, PRIntn osflags, int mode)
+{
+    HFILE file;
+    PRInt32 access = OPEN_SHARE_DENYNONE;
+    PRInt32 flags = 0L;
+    APIRET rc = 0;
+    PRUword actionTaken;
+
+#ifdef MOZ_OS2_HIGH_MEMORY
+    /*
+     * All the pointer arguments (&file, &actionTaken and name) have to be in
+     * low memory for DosOpen to use them.
+     * The following moves name to low memory.
+     */
+    if ((ULONG)name >= 0x20000000)
+    {
+        size_t len = strlen(name) + 1;
+        char *copy = (char *)alloca(len);
+        memcpy(copy, name, len);
+        name = copy;
+    }
+#endif
+
+    if (osflags & PR_SYNC) {
+        access |= OPEN_FLAGS_WRITE_THROUGH;
+    }
+
+    if (osflags & PR_RDONLY) {
+        access |= OPEN_ACCESS_READONLY;
+    }
+    else if (osflags & PR_WRONLY) {
+        access |= OPEN_ACCESS_WRITEONLY;
+    }
+    else if(osflags & PR_RDWR) {
+        access |= OPEN_ACCESS_READWRITE;
+    }
+
+    if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL )
+    {
+        flags = OPEN_ACTION_CREATE_IF_NEW | OPEN_ACTION_FAIL_IF_EXISTS;
+    }
+    else if (osflags & PR_CREATE_FILE)
+    {
+        if (osflags & PR_TRUNCATE) {
+            flags = OPEN_ACTION_CREATE_IF_NEW | OPEN_ACTION_REPLACE_IF_EXISTS;
+        }
+        else {
+            flags = OPEN_ACTION_CREATE_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS;
+        }
+    }
+    else
+    {
+        if (osflags & PR_TRUNCATE) {
+            flags = OPEN_ACTION_FAIL_IF_NEW | OPEN_ACTION_REPLACE_IF_EXISTS;
+        }
+        else {
+            flags = OPEN_ACTION_FAIL_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS;
+        }
+    }
+
+    do {
+        if (isWSEB)
+        {
+            rc = myDosOpenL((char*)name,
+                            &file,            /* file handle if successful */
+                            &actionTaken,     /* reason for failure        */
+                            0,                /* initial size of new file  */
+                            FILE_NORMAL,      /* file system attributes    */
+                            flags,            /* Open flags                */
+                            access,           /* Open mode and rights      */
+                            0);               /* OS/2 Extended Attributes  */
+        }
+        else
+        {
+            rc = DosOpen((char*)name,
+                         &file,            /* file handle if successful */
+                         &actionTaken,     /* reason for failure        */
+                         0,                /* initial size of new file  */
+                         FILE_NORMAL,      /* file system attributes    */
+                         flags,            /* Open flags                */
+                         access,           /* Open mode and rights      */
+                         0);               /* OS/2 Extended Attributes  */
+        };
+        if (rc == ERROR_TOO_MANY_OPEN_FILES) {
+            ULONG CurMaxFH = 0;
+            LONG ReqCount = 20;
+            APIRET rc2;
+            rc2 = DosSetRelMaxFH(&ReqCount, &CurMaxFH);
+            if (rc2 != NO_ERROR) {
+                break;
+            }
+        }
+    } while (rc == ERROR_TOO_MANY_OPEN_FILES);
+
+    if (rc != NO_ERROR) {
+        _PR_MD_MAP_OPEN_ERROR(rc);
+        return -1;
+    }
+
+    return (PRInt32)file;
+}
+
+PRInt32
+_PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 len)
+{
+    ULONG bytes;
+    int rv;
+
+    rv = DosRead((HFILE)fd->secret->md.osfd,
+                 (PVOID)buf,
+                 len,
+                 &bytes);
+
+    if (rv != NO_ERROR)
+    {
+        /* ERROR_HANDLE_EOF can only be returned by async io */
+        PR_ASSERT(rv != ERROR_HANDLE_EOF);
+        if (rv == ERROR_BROKEN_PIPE) {
+            return 0;
+        }
+        else {
+            _PR_MD_MAP_READ_ERROR(rv);
+            return -1;
+        }
+    }
+    return (PRInt32)bytes;
+}
+
+PRInt32
+_PR_MD_WRITE(PRFileDesc *fd, const void *buf, PRInt32 len)
+{
+    PRInt32 bytes;
+    int rv;
+
+    rv = DosWrite((HFILE)fd->secret->md.osfd,
+                  (PVOID)buf,
+                  len,
+                  (PULONG)&bytes);
+
+    if (rv != NO_ERROR)
+    {
+        _PR_MD_MAP_WRITE_ERROR(rv);
+        return -1;
+    }
+
+    if (len != bytes) {
+        rv = ERROR_DISK_FULL;
+        _PR_MD_MAP_WRITE_ERROR(rv);
+        return -1;
+    }
+
+    return bytes;
+} /* --- end _PR_MD_WRITE() --- */
+
+PRInt32
+_PR_MD_LSEEK(PRFileDesc *fd, PRInt32 offset, PRSeekWhence whence)
+{
+    PRInt32 rv;
+    PRUword newLocation;
+
+    rv = DosSetFilePtr((HFILE)fd->secret->md.osfd, offset, whence, &newLocation);
+
+    if (rv != NO_ERROR) {
+        _PR_MD_MAP_LSEEK_ERROR(rv);
+        return -1;
+    } else {
+        return newLocation;
+    }
+}
+
+PRInt64
+_PR_MD_LSEEK64(PRFileDesc *fd, PRInt64 offset, PRSeekWhence whence)
+{
+#ifdef NO_LONG_LONG
+    PRInt64 result;
+    PRInt32 rv, low = offset.lo, hi = offset.hi;
+    PRUword newLocation;
+
+    rv = DosSetFilePtr((HFILE)fd->secret->md.osfd, low, whence, &newLocation);
+    rv = DosSetFilePtr((HFILE)fd->secret->md.osfd, hi, FILE_CURRENT, &newLocation);
+
+    if (rv != NO_ERROR) {
+        _PR_MD_MAP_LSEEK_ERROR(rv);
+        hi = newLocation = -1;
+    }
+
+    result.lo = newLocation;
+    result.hi = hi;
+    return result;
+
+#else
+    PRInt32 where, rc, lo = (PRInt32)offset, hi = (PRInt32)(offset >> 32);
+    PRUint64 rv;
+    PRUint32 newLocation, uhi;
+    PRUint64 newLocationL;
+
+    switch (whence)
+    {
+        case PR_SEEK_SET:
+            where = FILE_BEGIN;
+            break;
+        case PR_SEEK_CUR:
+            where = FILE_CURRENT;
+            break;
+        case PR_SEEK_END:
+            where = FILE_END;
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return -1;
+    }
+    if (isWSEB)
+    {
+        rc = myDosSetFilePtrL((HFILE)fd->secret->md.osfd, offset, where, (PLONGLONG)&newLocationL);
+    }
+    else
+    {
+        rc = DosSetFilePtr((HFILE)fd->secret->md.osfd, lo, where, (PULONG)&newLocation);
+    }
+
+    if (rc != NO_ERROR) {
+        _PR_MD_MAP_LSEEK_ERROR(rc);
+        return -1;
+    }
+
+    if (isWSEB)
+    {
+        return newLocationL;
+    }
+
+    uhi = (PRUint32)hi;
+    PR_ASSERT((PRInt32)uhi >= 0);
+    rv = uhi;
+    PR_ASSERT((PRInt64)rv >= 0);
+    rv = (rv << 32);
+    PR_ASSERT((PRInt64)rv >= 0);
+    rv += newLocation;
+    PR_ASSERT((PRInt64)rv >= 0);
+    return (PRInt64)rv;
+#endif
+}
+
+PRInt32
+_PR_MD_FSYNC(PRFileDesc *fd)
+{
+    PRInt32 rc = DosResetBuffer((HFILE)fd->secret->md.osfd);
+
+    if (rc != NO_ERROR) {
+        if (rc != ERROR_ACCESS_DENIED) {
+            _PR_MD_MAP_FSYNC_ERROR(rc);
+            return -1;
+        }
+    }
+    return 0;
+}
+
+PRInt32
+_MD_CloseFile(PRInt32 osfd)
+{
+    PRInt32 rv;
+
+    rv = DosClose((HFILE)osfd);
+    if (rv != NO_ERROR) {
+        _PR_MD_MAP_CLOSE_ERROR(rv);
+    }
+    return rv;
+}
+
+
+/* --- DIR IO ------------------------------------------------------------ */
+#define GetFileFromDIR(d)       (isWSEB?(d)->d_entry.large.achName:(d)->d_entry.small.achName)
+#define GetFileAttr(d)          (isWSEB?(d)->d_entry.large.attrFile:(d)->d_entry.small.attrFile)
+
+void FlipSlashes(char *cp, int len)
+{
+    while (--len >= 0) {
+        if (cp[0] == '/') {
+            cp[0] = PR_DIRECTORY_SEPARATOR;
+        }
+        cp++;
+    }
+}
+
+/*
+**
+** Local implementations of standard Unix RTL functions which are not provided
+** by the VAC RTL.
+**
+*/
+
+PRInt32
+_PR_MD_CLOSE_DIR(_MDDir *d)
+{
+    PRInt32 rc;
+
+    if ( d ) {
+        rc = DosFindClose(d->d_hdl);
+        if(rc == NO_ERROR) {
+            d->magic = (PRUint32)-1;
+            return PR_SUCCESS;
+        } else {
+            _PR_MD_MAP_CLOSEDIR_ERROR(rc);
+            return PR_FAILURE;
+        }
+    }
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return PR_FAILURE;
+}
+
+
+PRStatus
+_PR_MD_OPEN_DIR(_MDDir *d, const char *name)
+{
+    char filename[ CCHMAXPATH ];
+    PRUword numEntries, rc;
+
+    numEntries = 1;
+
+    PR_snprintf(filename, CCHMAXPATH, "%s%s%s",
+                name, PR_DIRECTORY_SEPARATOR_STR, "*.*");
+    FlipSlashes( filename, strlen(filename) );
+
+    d->d_hdl = HDIR_CREATE;
+
+    if (isWSEB)
+    {
+        rc = DosFindFirst( filename,
+                           &d->d_hdl,
+                           FILE_DIRECTORY | FILE_HIDDEN,
+                           &(d->d_entry.large),
+                           sizeof(d->d_entry.large),
+                           &numEntries,
+                           FIL_STANDARDL);
+    }
+    else
+    {
+        rc = DosFindFirst( filename,
+                           &d->d_hdl,
+                           FILE_DIRECTORY | FILE_HIDDEN,
+                           &(d->d_entry.small),
+                           sizeof(d->d_entry.small),
+                           &numEntries,
+                           FIL_STANDARD);
+    }
+    if ( rc != NO_ERROR ) {
+        _PR_MD_MAP_OPENDIR_ERROR(rc);
+        return PR_FAILURE;
+    }
+    d->firstEntry = PR_TRUE;
+    d->magic = _MD_MAGIC_DIR;
+    return PR_SUCCESS;
+}
+
+char *
+_PR_MD_READ_DIR(_MDDir *d, PRIntn flags)
+{
+    PRUword numFiles = 1;
+    BOOL rv;
+    char *fileName;
+    USHORT fileAttr;
+
+    if ( d ) {
+        while (1) {
+            if (d->firstEntry) {
+                d->firstEntry = PR_FALSE;
+                rv = NO_ERROR;
+            } else {
+                rv = DosFindNext(d->d_hdl,
+                                 &(d->d_entry),
+                                 sizeof(d->d_entry),
+                                 &numFiles);
+            }
+            if (rv != NO_ERROR) {
+                break;
+            }
+            fileName = GetFileFromDIR(d);
+            fileAttr = GetFileAttr(d);
+            if ( (flags & PR_SKIP_DOT) &&
+                 (fileName[0] == '.') && (fileName[1] == '\0')) {
+                continue;
+            }
+            if ( (flags & PR_SKIP_DOT_DOT) &&
+                 (fileName[0] == '.') && (fileName[1] == '.') &&
+                 (fileName[2] == '\0')) {
+                continue;
+            }
+            /*
+             * XXX
+             * Is this the correct definition of a hidden file on OS/2?
+             */
+            if ((flags & PR_SKIP_NONE) && (fileAttr & FILE_HIDDEN)) {
+                return fileName;
+            }
+            else if ((flags & PR_SKIP_HIDDEN) && (fileAttr & FILE_HIDDEN)) {
+                continue;
+            }
+            return fileName;
+        }
+        PR_ASSERT(NO_ERROR != rv);
+        _PR_MD_MAP_READDIR_ERROR(rv);
+        return NULL;
+    }
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return NULL;
+}
+
+PRInt32
+_PR_MD_DELETE(const char *name)
+{
+    PRInt32 rc = DosDelete((char*)name);
+    if(rc == NO_ERROR) {
+        return 0;
+    } else {
+        _PR_MD_MAP_DELETE_ERROR(rc);
+        return -1;
+    }
+}
+
+PRInt32
+_PR_MD_STAT(const char *fn, struct stat *info)
+{
+    PRInt32 rv;
+    char filename[CCHMAXPATH];
+
+    PR_snprintf(filename, CCHMAXPATH, "%s", fn);
+    FlipSlashes(filename, strlen(filename));
+
+    rv = _stat((char*)filename, info);
+    if (-1 == rv) {
+        /*
+         * Check for MSVC runtime library _stat() bug.
+         * (It's really a bug in FindFirstFile().)
+         * If a pathname ends in a backslash or slash,
+         * e.g., c:\temp\ or c:/temp/, _stat() will fail.
+         * Note: a pathname ending in a slash (e.g., c:/temp/)
+         * can be handled by _stat() on NT but not on Win95.
+         *
+         * We remove the backslash or slash at the end and
+         * try again.
+         *
+         * Not sure if this happens on OS/2 or not,
+         * but it doesn't hurt to be careful.
+         */
+
+        int len = strlen(fn);
+        if (len > 0 && len <= _MAX_PATH
+            && (fn[len - 1] == '\\' || fn[len - 1] == '/')) {
+            char newfn[_MAX_PATH + 1];
+
+            strcpy(newfn, fn);
+            newfn[len - 1] = '\0';
+            rv = _stat(newfn, info);
+        }
+    }
+
+    if (-1 == rv) {
+        _PR_MD_MAP_STAT_ERROR(errno);
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_GETFILEINFO(const char *fn, PRFileInfo *info)
+{
+    struct stat sb;
+    PRInt32 rv;
+    PRInt64 s, s2us;
+
+    if ( (rv = _PR_MD_STAT(fn, &sb)) == 0 ) {
+        if (info) {
+            if (S_IFREG & sb.st_mode) {
+                info->type = PR_FILE_FILE ;
+            }
+            else if (S_IFDIR & sb.st_mode) {
+                info->type = PR_FILE_DIRECTORY;
+            }
+            else {
+                info->type = PR_FILE_OTHER;
+            }
+            info->size = sb.st_size;
+            LL_I2L(s2us, PR_USEC_PER_SEC);
+            LL_I2L(s, sb.st_mtime);
+            LL_MUL(s, s, s2us);
+            info->modifyTime = s;
+            LL_I2L(s, sb.st_ctime);
+            LL_MUL(s, s, s2us);
+            info->creationTime = s;
+        }
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_GETFILEINFO64(const char *fn, PRFileInfo64 *info)
+{
+    PRFileInfo info32;
+    PRInt32 rv = _PR_MD_GETFILEINFO(fn, &info32);
+    if (rv != 0)
+    {
+        return rv;
+    }
+    info->type = info32.type;
+    LL_UI2L(info->size,info32.size);
+    info->modifyTime = info32.modifyTime;
+    info->creationTime = info32.creationTime;
+
+    if (isWSEB)
+    {
+        APIRET rc ;
+        FILESTATUS3L fstatus;
+
+        rc = DosQueryPathInfo(fn, FIL_STANDARDL, &fstatus, sizeof(fstatus));
+
+        if (NO_ERROR != rc)
+        {
+            _PR_MD_MAP_OPEN_ERROR(rc);
+            return -1;
+        }
+
+        if (! (fstatus.attrFile & FILE_DIRECTORY))
+        {
+            info->size = fstatus.cbFile;
+        }
+    }
+
+    return rv;
+}
+
+PRInt32
+_PR_MD_GETOPENFILEINFO(const PRFileDesc *fd, PRFileInfo *info)
+{
+    /* For once, the VAC compiler/library did a nice thing.
+     * The file handle used by the C runtime is the same one
+     * returned by the OS when you call DosOpen().  This means
+     * that you can take an OS HFILE and use it with C file
+     * functions.  The only caveat is that you have to call
+     * _setmode() first to initialize some junk.  This is
+     * immensely useful because I did not have a clue how to
+     * implement this function otherwise.  The windows folks
+     * took the source from the Microsoft C library source, but
+     * IBM wasn't kind enough to ship the source with VAC.
+     * On second thought, the needed function could probably
+     * be gotten from the OS/2 GNU library source, but the
+     * point is now moot.
+     */
+    struct stat hinfo;
+    PRInt64 s, s2us;
+
+    _setmode(fd->secret->md.osfd, O_BINARY);
+    if(fstat((int)fd->secret->md.osfd, &hinfo) != NO_ERROR) {
+        _PR_MD_MAP_FSTAT_ERROR(errno);
+        return -1;
+    }
+
+    if (hinfo.st_mode & S_IFDIR) {
+        info->type = PR_FILE_DIRECTORY;
+    }
+    else {
+        info->type = PR_FILE_FILE;
+    }
+
+    info->size = hinfo.st_size;
+    LL_I2L(s2us, PR_USEC_PER_SEC);
+    LL_I2L(s, hinfo.st_mtime);
+    LL_MUL(s, s, s2us);
+    info->modifyTime = s;
+    LL_I2L(s, hinfo.st_ctime);
+    LL_MUL(s, s, s2us);
+    info->creationTime = s;
+
+    return 0;
+}
+
+PRInt32
+_PR_MD_GETOPENFILEINFO64(const PRFileDesc *fd, PRFileInfo64 *info)
+{
+    PRFileInfo info32;
+    PRInt32 rv = _PR_MD_GETOPENFILEINFO(fd, &info32);
+    if (0 == rv)
+    {
+        info->type = info32.type;
+        LL_UI2L(info->size,info32.size);
+
+        info->modifyTime = info32.modifyTime;
+        info->creationTime = info32.creationTime;
+    }
+
+    if (isWSEB)
+    {
+        APIRET rc ;
+        FILESTATUS3L fstatus;
+
+        rc = DosQueryFileInfo(fd->secret->md.osfd, FIL_STANDARDL, &fstatus, sizeof(fstatus));
+
+        if (NO_ERROR != rc)
+        {
+            _PR_MD_MAP_OPEN_ERROR(rc);
+            return -1;
+        }
+
+        if (! (fstatus.attrFile & FILE_DIRECTORY))
+        {
+            info->size = fstatus.cbFile;
+        }
+    }
+
+    return rv;
+}
+
+
+PRInt32
+_PR_MD_RENAME(const char *from, const char *to)
+{
+    PRInt32 rc;
+    /* Does this work with dot-relative pathnames? */
+    if ( (rc = DosMove((char *)from, (char *)to)) == NO_ERROR) {
+        return 0;
+    } else {
+        _PR_MD_MAP_RENAME_ERROR(rc);
+        return -1;
+    }
+}
+
+PRInt32
+_PR_MD_ACCESS(const char *name, PRAccessHow how)
+{
+    PRInt32 rv;
+    switch (how) {
+        case PR_ACCESS_WRITE_OK:
+            rv = access(name, 02);
+            break;
+        case PR_ACCESS_READ_OK:
+            rv = access(name, 04);
+            break;
+        case PR_ACCESS_EXISTS:
+            return access(name, 00);
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return -1;
+    }
+    if (rv < 0) {
+        _PR_MD_MAP_ACCESS_ERROR(errno);
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_MKDIR(const char *name, PRIntn mode)
+{
+    PRInt32 rc;
+    /* XXXMB - how to translate the "mode"??? */
+    if ((rc = DosCreateDir((char *)name, NULL))== NO_ERROR) {
+        return 0;
+    } else {
+        _PR_MD_MAP_MKDIR_ERROR(rc);
+        return -1;
+    }
+}
+
+PRInt32
+_PR_MD_RMDIR(const char *name)
+{
+    PRInt32 rc;
+    if ( (rc = DosDeleteDir((char *)name)) == NO_ERROR) {
+        return 0;
+    } else {
+        _PR_MD_MAP_RMDIR_ERROR(rc);
+        return -1;
+    }
+}
+
+PRStatus
+_PR_MD_LOCKFILE(PRInt32 f)
+{
+    PRInt32   rv;
+    FILELOCK lock, unlock;
+    FILELOCKL lockL, unlockL;
+
+    lock.lOffset = 0;
+    lockL.lOffset = 0;
+    lock.lRange = 0xffffffff;
+    lockL.lRange =  0xffffffffffffffff;
+    unlock.lOffset = 0;
+    unlock.lRange = 0;
+    unlockL.lOffset = 0;
+    unlockL.lRange = 0;
+
+    /*
+     * loop trying to DosSetFileLocks(),
+     * pause for a few miliseconds when can't get the lock
+     * and try again
+     */
+    for( rv = FALSE; rv == FALSE; /* do nothing */ )
+    {
+        if (isWSEB)
+        {
+            rv = myDosSetFileLocksL( (HFILE) f,
+                                     &unlockL, &lockL,
+                                     0, 0);
+        }
+        else
+        {
+            rv = DosSetFileLocks( (HFILE) f,
+                                  &unlock, &lock,
+                                  0, 0);
+        }
+        if ( rv != NO_ERROR )
+        {
+            DosSleep( 50 );  /* Sleep() a few milisecs and try again. */
+        }
+    } /* end for() */
+    return PR_SUCCESS;
+} /* end _PR_MD_LOCKFILE() */
+
+PRStatus
+_PR_MD_TLOCKFILE(PRInt32 f)
+{
+    return _PR_MD_LOCKFILE(f);
+} /* end _PR_MD_TLOCKFILE() */
+
+
+PRStatus
+_PR_MD_UNLOCKFILE(PRInt32 f)
+{
+    PRInt32   rv;
+    FILELOCK lock, unlock;
+    FILELOCKL lockL, unlockL;
+
+    lock.lOffset = 0;
+    lockL.lOffset = 0;
+    lock.lRange = 0;
+    lockL.lRange = 0;
+    unlock.lOffset = 0;
+    unlockL.lOffset = 0;
+    unlock.lRange = 0xffffffff;
+    unlockL.lRange = 0xffffffffffffffff;
+
+    if (isWSEB)
+    {
+        rv = myDosSetFileLocksL( (HFILE) f,
+                                 &unlockL, &lockL,
+                                 0, 0);
+    }
+    else
+    {
+        rv = DosSetFileLocks( (HFILE) f,
+                              &unlock, &lock,
+                              0, 0);
+    }
+
+    if ( rv != NO_ERROR )
+    {
+        return PR_SUCCESS;
+    }
+    else
+    {
+        return PR_FAILURE;
+    }
+} /* end _PR_MD_UNLOCKFILE() */
+
+PRStatus
+_PR_MD_SET_FD_INHERITABLE(PRFileDesc *fd, PRBool inheritable)
+{
+    APIRET rc = 0;
+    ULONG flags;
+    switch (fd->methods->file_type)
+    {
+        case PR_DESC_PIPE:
+        case PR_DESC_FILE:
+            rc = DosQueryFHState((HFILE)fd->secret->md.osfd, &flags);
+            if (rc != NO_ERROR) {
+                PR_SetError(PR_UNKNOWN_ERROR, _MD_ERRNO());
+                return PR_FAILURE;
+            }
+
+            if (inheritable) {
+                flags &= ~OPEN_FLAGS_NOINHERIT;
+            }
+            else {
+                flags |= OPEN_FLAGS_NOINHERIT;
+            }
+
+            /* Mask off flags DosSetFHState don't want. */
+            flags &= (OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT);
+            rc = DosSetFHState((HFILE)fd->secret->md.osfd, flags);
+            if (rc != NO_ERROR) {
+                PR_SetError(PR_UNKNOWN_ERROR, _MD_ERRNO());
+                return PR_FAILURE;
+            }
+            break;
+
+        case PR_DESC_LAYERED:
+            /* what to do here? */
+            PR_SetError(PR_UNKNOWN_ERROR, 87 /*ERROR_INVALID_PARAMETER*/);
+            return PR_FAILURE;
+
+        case PR_DESC_SOCKET_TCP:
+        case PR_DESC_SOCKET_UDP:
+            /* These are global on OS/2. */
+            break;
+    }
+
+    return PR_SUCCESS;
+}
+
+void
+_PR_MD_INIT_FD_INHERITABLE(PRFileDesc *fd, PRBool imported)
+{
+    /* XXX this function needs to be implemented */
+    fd->secret->inheritable = _PR_TRI_UNKNOWN;
+}
+
+void
+_PR_MD_QUERY_FD_INHERITABLE(PRFileDesc *fd)
+{
+    /* XXX this function needs to be reviewed */
+    ULONG flags;
+
+    PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable);
+    if (DosQueryFHState((HFILE)fd->secret->md.osfd, &flags) == 0) {
+        if (flags & OPEN_FLAGS_NOINHERIT) {
+            fd->secret->inheritable = _PR_TRI_FALSE;
+        } else {
+            fd->secret->inheritable = _PR_TRI_TRUE;
+        }
+    }
+}