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-rw-r--r--crypto/heimdal/lib/roken/flock.c93
1 files changed, 80 insertions, 13 deletions
diff --git a/crypto/heimdal/lib/roken/flock.c b/crypto/heimdal/lib/roken/flock.c
index 911d5ff..068d099 100644
--- a/crypto/heimdal/lib/roken/flock.c
+++ b/crypto/heimdal/lib/roken/flock.c
@@ -1,23 +1,23 @@
/*
- * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
+ * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
- *
+ *
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
- *
+ *
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- *
+ *
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -31,25 +31,22 @@
* SUCH DAMAGE.
*/
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#ifndef HAVE_FLOCK
-RCSID("$Id: flock.c 14773 2005-04-12 11:29:18Z lha $");
#include "roken.h"
-
#define OP_MASK (LOCK_SH | LOCK_EX | LOCK_UN)
-int ROKEN_LIB_FUNCTION
-flock(int fd, int operation)
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+rk_flock(int fd, int operation)
{
#if defined(HAVE_FCNTL) && defined(F_SETLK)
struct flock arg;
int code, cmd;
-
+
arg.l_whence = SEEK_SET;
arg.l_start = 0;
arg.l_len = 0; /* means to EOF */
@@ -78,6 +75,76 @@ flock(int fd, int operation)
break;
}
return code;
+
+#elif defined(_WIN32)
+ /* Windows */
+
+#define FLOCK_OFFSET_LOW 0
+#define FLOCK_OFFSET_HIGH 0
+#define FLOCK_LENGTH_LOW 0x00000000
+#define FLOCK_LENGTH_HIGH 0x80000000
+
+ HANDLE hFile;
+ OVERLAPPED ov;
+ BOOL rv = FALSE;
+ DWORD f = 0;
+
+ hFile = (HANDLE) _get_osfhandle(fd);
+ if (hFile == NULL || hFile == INVALID_HANDLE_VALUE) {
+ _set_errno(EBADF);
+ return -1;
+ }
+
+ ZeroMemory(&ov, sizeof(ov));
+ ov.hEvent = NULL;
+ ov.Offset = FLOCK_OFFSET_LOW;
+ ov.OffsetHigh = FLOCK_OFFSET_HIGH;
+
+ if (operation & LOCK_NB)
+ f = LOCKFILE_FAIL_IMMEDIATELY;
+
+ switch (operation & OP_MASK) {
+ case LOCK_UN: /* Unlock */
+ rv = UnlockFileEx(hFile, 0,
+ FLOCK_LENGTH_LOW, FLOCK_LENGTH_HIGH, &ov);
+ break;
+
+ case LOCK_SH: /* Shared lock */
+ rv = LockFileEx(hFile, f, 0,
+ FLOCK_LENGTH_LOW, FLOCK_LENGTH_HIGH, &ov);
+ break;
+
+ case LOCK_EX: /* Exclusive lock */
+ rv = LockFileEx(hFile, f|LOCKFILE_EXCLUSIVE_LOCK, 0,
+ FLOCK_LENGTH_LOW, FLOCK_LENGTH_HIGH,
+ &ov);
+ break;
+
+ default:
+ _set_errno(EINVAL);
+ return -1;
+ }
+
+ if (!rv) {
+ switch (GetLastError()) {
+ case ERROR_SHARING_VIOLATION:
+ case ERROR_LOCK_VIOLATION:
+ case ERROR_IO_PENDING:
+ _set_errno(EWOULDBLOCK);
+ break;
+
+ case ERROR_ACCESS_DENIED:
+ _set_errno(EACCES);
+ break;
+
+ default:
+ _set_errno(ENOLCK);
+ }
+ return -1;
+ }
+
+ return 0;
+
#else
return -1;
#endif
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