2 .\" Copyright (c) 1997 Shigio Yamaguchi. All rights reserved.
3 .\" Copyright (c) 1999 Tama Communications Corporation. All rights reserved.
5 .\" Redistribution and use in source and binary forms, with or without
6 .\" modification, are permitted provided that the following conditions
8 .\" 1. Redistributions of source code must retain the above copyright
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10 .\" 2. Redistributions in binary form must reproduce the above copyright
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14 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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33 .Nd make an absolute path name from a relative path name
36 .Fn rel2abs "const char *path" "const char *base" "char *result" "size_t size"
40 function makes an absolute path name from a relative path name
44 and copies the resulting path name into the memory referenced by
48 argument must refer to a buffer capable of storing at least
52 The resulting path name may include symbolic links.
54 doesn't check whether or not any path exists.
58 function returns absolute path name on success.
59 If an error occurs, it returns
64 function may fail and set the external variable
66 to indicate the error.
71 directory isn't an absolute path name or the
77 argument is greater than zero but smaller than the length of the pathname plus 1
79 char result[MAXPATHLEN];
80 char *path = rel2abs("../../src/sys", "/usr/local/lib", result, MAXPATHLEN);
84 path == "/usr/src/sys"
88 path1 = rel2abs("src/sys", "/usr", result, MAXPATHLEN);
89 path2 = rel2abs(".", "/usr/src/sys", result, MAXPATHLEN);
93 path1 == "/usr/src/sys"
94 path2 == "/usr/src/sys"
98 Shigio Yamaguchi (shigio@tamacom.com)