91 lines
3.4 KiB
C
91 lines
3.4 KiB
C
/*
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* Copyright 1999 by The XFree86 Project, Inc.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution, and in the same place and form as other copyright,
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* license and disclaimer information.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment: "This product
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* includes software developed by The XFree86 Project, Inc
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* (http://www.xfree86.org/) and its contributors", in the same
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* place and form as other third-party acknowledgments. Alternately,
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* this acknowledgment may appear in the software itself, in the
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* same form and location as other such third-party acknowledgments.
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*
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* 4. Except as contained in this notice, the name of The XFree86
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* Project, Inc shall not be used in advertising or otherwise to
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* promote the sale, use or other dealings in this Software without
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* prior written authorization from The XFree86 Project, Inc.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE XFREE86 PROJECT, INC OR ITS CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $XFree86: xc/config/util/revpath.c,v 1.3 2004/02/13 23:58:28 dawes Exp $ */
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/*
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* Reverse a pathname. It returns a relative path that can be used to undo
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* 'cd argv[1]'.
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*
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* It is impossible to do this in general, but this handles the cases that
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* come up in imake. Maybe imake should use an absolute path for $(TOP)
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* instead of a relative path so that this problem can be avoided?
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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int
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main(int argc, char *argv[])
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{
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int levels = 0;
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char *p;
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/* Silently ignore invalid usage */
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if (argc != 2)
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exit(0);
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/* Split the path and count the levels */
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p = strtok(argv[1], "/");
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while (p) {
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if (strcmp(p, ".") == 0)
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;
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else if (strcmp(p, "..") == 0)
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levels--;
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else
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levels++;
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p = strtok(NULL, "/");
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}
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while (levels-- > 0)
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printf("../");
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printf("\n");
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exit(0);
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}
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