47 lines
873 B
C
47 lines
873 B
C
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/*
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* Copyright 1999 by The XFree86 Project, Inc.
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*/
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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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