readlink(2) [sunos man page]

readlink(2)							   System Calls 						       readlink(2)

NAME

       readlink - read the contents of a symbolic link

SYNOPSIS

       #include <unistd.h>

       ssize_t readlink(const char *restrict path, char *restrict buf, size_t bufsiz);

DESCRIPTION

       The  readlink() function places the contents of the symbolic link referred to by path in the buffer buf which has size bufsiz.  If the num-
       ber of bytes in the symbolic link is less than bufsiz, the contents of the remainder of buf are left unchanged. If the buf argument is  not
       large enough to contain the link content, the first bufsize bytes are placed in buf.

RETURN VALUES

       Upon  successful  completion,  readlink()  returns  the	count of bytes placed in the buffer.  Otherwise, it returns  -1, leaves the buffer
       unchanged, and sets errno to indicate the error.

ERRORS

       The readlink() function will fail if:

       EACCES	       Search permission is denied for a component of the path prefix of path.

       EFAULT	       path or buf points to an illegal address.

       EINVAL	       The path argument names a file that is not a symbolic link.

       EIO	       An I/O error occurred while reading from the file system.

       ENOENT	       A component of path does not name an existing file or path is an empty string.

       ELOOP	       A loop exists in symbolic links encountered during resolution of the path argument.

       ENAMETOOLONG    The length of path exceeds {PATH_MAX}, or a pathname component is  longer  than	{NAME_MAX}  while  _POSIX_NO_TRUNC  is	in
		       effect.

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

       ENOSYS	       The file system does not support symbolic links.

       The readlink() function may fail if:

       EACCES	       Read permission is denied for the directory.

       ELOOP	       More than {SYMLOOP_MAX} symbolic links were encountered in resolving path.

       ENAMETOOLONG    As  a  result  of  encountering	a symbolic link in resolution of the path argument, the length of the substituted pathname
		       string exceeded {PATH_MAX}.

USAGE

       Portable applications should not assume that the returned contents of the symbolic link are null-terminated.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       stat(2), symlink(2), attributes(5), standards(5)

SunOS 5.10							    1 Dec 2003							       readlink(2)

Check Out this Related Man Page

resolvepath(2)							   System Calls 						    resolvepath(2)

NAME

       resolvepath - resolve all symbolic links of a path name

SYNOPSIS

       #include <unistd.h>

       int resolvepath(const char *path, char *buf, size_t bufsiz);

DESCRIPTION

       The  resolvepath()  function  fully resolves all symbolic links in the path name path into a resulting path name free of symbolic links and
       places the resulting path name in the buffer buf which has size bufsiz. The resulting path name names the same file  or	directory  as  the
       original  path  name.  All ``.'' components are eliminated and every non-leading ``..'' component is eliminated together with its preceding
       directory component. If leading ``..'' components reach to the root directory, they are replaced by ``/''. If the number of  bytes  in  the
       resulting path name is less than bufsiz, the contents of the remainder of buf are unspecified.

RETURN VALUES

       Upon  successful  completion,  resolvepath()  returns the count of bytes placed in the buffer. Otherwise, it returns  -1, leaves the buffer
       unchanged, and sets errno to indicate the error.

ERRORS

       The resolvepath() function will fail if:

       EACCES		       Search permission is denied for a component of the path prefix of path or for a	path  prefix  component  resulting
			       from the resolution of a symbolic link.

       EFAULT		       The path or buf argument points to an illegal address.

       EIO		       An I/O error occurred while reading from the file system.

       ENOENT		       The  path  argument is an empty string or a component of path or a path name component produced by resolving a sym-
			       bolic link does not name an existing file.

       ELOOP		       Too many symbolic links were encountered in resolving path.

       ENAMETOOLONG	       The length of path exceeds PATH_MAX, or a path name component is longer than NAME_MAX. Path name  resolution  of  a
			       symbolic  link  produced  an  intermediate result whose length exceeds PATH_MAX or a component whose length exceeds
			       NAME_MAX.

       ENOTDIR		       A component of the path prefix of path or of a path prefix component resulting from the resolution  of  a  symbolic
			       link is not a directory.

USAGE

       No more than PATH_MAX bytes will be placed in the buffer. Applications should not assume that the returned contents of the buffer are null-
       terminated.

SEE ALSO

       readlink(2), realpath(3C)

SunOS 5.10							    12 May 1997 						    resolvepath(2)

Linux and UNIX Man Pages

readlink(2) [sunos man page]

Check Out this Related Man Page