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READLINK(2)		   Linux Programmer's Manual		   READLINK(2)

       readlink - read value of a symbolic link

       #include <unistd.h>

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

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       readlink(): _BSD_SOURCE || _XOPEN_SOURCE >= 500 ||
       _POSIX_C_SOURCE >= 200112L

       readlink() places the contents of the symbolic link path in the	buffer
       buf,  which has size bufsiz.  readlink() does not append a null byte to
       buf.  It will truncate the contents (to a length of bufsiz characters),
       in case the buffer is too small to hold all of the contents.

       On  success,  readlink() returns the number of bytes placed in buf.  On
       error, -1 is returned and errno is set to indicate the error.

       EACCES Search permission is denied for a component of the path  prefix.
	      (See also path_resolution(7).)

       EFAULT buf extends outside the process's allocated address space.

       EINVAL bufsiz is not positive.

       EINVAL The named file is not a symbolic link.

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

       ELOOP  Too  many	 symbolic  links  were	encountered in translating the

	      A pathname, or a component of a pathname, was too long.

       ENOENT The named file does not exist.

       ENOMEM Insufficient kernel memory was available.

	      A component of the path prefix is not a directory.

       4.4BSD (the readlink() function call appeared in 4.2BSD), POSIX.1-2001.

       In versions of glibc up to and including glibc 2.4, the return type  of
       readlink()  was declared as int.	 Nowadays, the return type is declared
       as ssize_t, as (newly) required in POSIX.1-2001.

       lstat(2), readlinkat(2), stat(2), symlink(2), path_resolution(7),  sym‐

       This  page  is  part of release 3.22 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at

Linux				  2007-07-26			   READLINK(2)

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