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Man Pages
CLEANNAME(3) FreeBSD Library Functions Manual CLEANNAME(3)

cleanname - clean a path name

#include <u.h>
#include <libc.h>

char* cleanname(char *filename)

Cleanname takes a filename and by lexical processing only returns the shortest string that names the same (possibly hypothetical) file. It eliminates multiple and trailing slashes, and it lexically interprets . and .. directory components in the name. The string is overwritten in place.

The shortest string cleanname can return is two bytes: the null-terminated string ".". Therefore filename must contain room for at least two bytes.

/src/lib9/cleanname.c


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