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REALPATH(3)	       FreeBSD Library Functions Manual		   REALPATH(3)

NAME
     realpath -- returns the canonicalized absolute pathname

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/param.h>
     #include <stdlib.h>

     char *
     realpath(const char * restrict pathname, char * restrict resolvedname);

DESCRIPTION
     The realpath() function resolves all symbolic links, extra	"/" characters
     and references to /./ and /../ in pathname, and copies the	resulting ab-
     solute pathname into the memory referenced	by resolvedname.  The
     resolvedname argument must	refer to a buffer capable of storing at	least
     MAXPATHLEN	characters, or be NULL.

     The realpath() function will resolve both absolute	and relative paths and
     return the	absolute pathname corresponding	to pathname.

RETURN VALUES
     If	resolvedname is	NULL, it will be allocated and the returned pointer
     can be deallocated	using free(3).	The realpath() function	returns
     resolvedname on success.  If an error occurs, realpath() returns NULL,
     and if resolvedname was not allocated by realpath(), it will contain the
     pathname which caused the problem.

ERRORS
     The function realpath() may fail and set the external variable errno for
     any of the	errors specified for the library functions lstat(2),
     readlink(2), getcwd(3) and	malloc(3).

     In	addition, the following	errors may be reported:

     [EINVAL]		The value of the pathname argument is NULL.

     [ELOOP]		Too many symbolic links	were encountered in translat-
			ing the	pathname.

     [ENAMETOOLONG]	The resulting absolute pathname	exceeds	MAXPATHLEN
			characters.

     [ENOENT]		The value of the pathname argument is an empty string;
			or a symbolic link to an empty string is encountered.

     [ENOTDIR]		A component of the path	prefix is not a	directory.

SEE ALSO
     getcwd(3)

STANDARDS
     realpath()	first appeared in X/Open Portability Guide Issue 4, Version 2
     ("XPG4.2")	and is part of IEEE Std	1003.1-2001 ("POSIX.1").

HISTORY
     The realpath() function call first	appeared in 4.4BSD.  In	NetBSD 7.0 the
     function was updated to accept a NULL pointer for the resolvedname	argu-
     ment.

BUGS
     This implementation of realpath() differs slightly	from the Solaris im-
     plementation.  The	4.4BSD version always returns absolute pathnames,
     whereas the Solaris implementation	will, under certain circumstances, re-
     turn a relative resolvedname when given a relative	pathname.

FreeBSD	13.0			 May 24, 2013			  FreeBSD 13.0

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | BUGS

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