|REALPATH(3)||Library Functions Manual||REALPATH(3)|
char *pathname, char
realpath() function resolves all symbolic links, extra “/” characters and references to /./ and /../ in pathname, and copies the resulting absolute pathname into the memory referenced by resolved. The resolved argument must refer to a buffer capable of storing at least
PATH_MAXcharacters, or be
realpath() function will resolve both
absolute and relative paths and return the absolute pathname corresponding
to pathname. All but the last component of
pathname must exist when
realpath() is called.
realpath() function returns resolved on success. If resolved is
NULLand no error occurred, then
realpath() returns a NUL-terminated string in a newly allocated buffer. If an error occurs,
NULLand the contents of resolved are undefined.
realpath() may fail and set the external variable errno for any of the errors specified for the library functions lstat(2), readlink(2), and getcwd(3). readlink(1), getcwd(3)
realpath() function conforms to IEEE Std 1003.1-2008 (“POSIX.1”).
realpath() function call first appeared in 4.4BSD.
realpath() differs slightly from the Solaris implementation. The 4.4BSD version always returns absolute pathnames, whereas the Solaris implementation will, under certain circumstances, return a relative resolved when given a relative pathname.
|January 20, 2014||OpenBSD-current|