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(Symbolic Links): Adjust description of realpath to new implementation.

This commit is contained in:
Ulrich Drepper 2002-05-16 06:38:36 +00:00
parent f7501ae6f1
commit 9905e036de
1 changed files with 13 additions and 6 deletions
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19
manual/filesys.texi
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@ -1223,13 +1223,20 @@ where the result is placed in.
@comment XPG
@deftypefun {char *} realpath (const char *restrict @var{name}, char *restrict @var{resolved})
The @code{realpath} function behaves just like
@code{canonicalize_file_name} but instead of allocating a buffer for the
result it is placed in the buffer pointed to by @var{resolved}.
A call to @code{realpath} where the @var{resolved} parameter is
@code{NULL} behaves exactly like @code{canonicalize_file_name}. The
function allocates a buffer for the file name and returns a pointer to
it. If @var{resolved} is not @code{NULL} it points to a buffer into
which the result is copied. It is the callers responsibility to
allocate a buffer which is large enough. On systems which define
@code{PATH_MAX} this means the buffer must be large enough for a
pathname of this size. For systems without limitations on the pathname
length the requirement cannot be met and programs should not call
@code{realpath} with anything but @code{NULL} for the second parameter.
One other difference is that the buffer @var{resolved} will contain the
part of the path component which does not exist or is not readable if
the function returns @code{NULL} and @code{errno} is set to
One other difference is that the buffer @var{resolved} (if nonzero) will
contain the part of the path component which does not exist or is not
readable if the function returns @code{NULL} and @code{errno} is set to
@code{EACCES} or @code{ENOENT}.
This function is declared in @file{stdlib.h}.