67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
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/* dirname.c -- return all but the last element in a path
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Copyright (C) 1990 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifdef STDC_HEADERS
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#include <stdlib.h>
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#else
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char *malloc ();
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#endif
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#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
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#include <string.h>
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#ifndef rindex
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#define rindex strrchr
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#endif
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#else
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#include <strings.h>
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#endif
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/* Return the leading directories part of PATH,
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allocated with malloc. If out of memory, return 0.
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Assumes that trailing slashes have already been
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removed. */
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char *
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dirname (path)
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char *path;
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{
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char *newpath;
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char *slash;
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int length; /* Length of result, not including NUL. */
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slash = rindex (path, '/');
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if (slash == 0)
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{
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/* File is in the current directory. */
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path = ".";
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length = 1;
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}
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else
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{
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/* Remove any trailing slashes from the result. */
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while (slash > path && *slash == '/')
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--slash;
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length = slash - path + 1;
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}
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newpath = malloc (length + 1);
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if (newpath == 0)
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return 0;
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strncpy (newpath, path, length);
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newpath[length] = 0;
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return newpath;
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}
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