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READLINK(2) UNIX Programmer's Manual READLINK(2)
NNAAMMEE
rreeaaddlliinnkk - read value of a symbolic link
SSYYNNOOPPSSIISS
##iinncclluuddee <<uunniissttdd..hh>>
_i_n_t
rreeaaddlliinnkk(_c_o_n_s_t _c_h_a_r _*_p_a_t_h, _c_h_a_r _*_b_u_f, _i_n_t _b_u_f_s_i_z)
DDEESSCCRRIIPPTTIIOONN
RReeaaddlliinnkk() places the contents of the symbolic link _p_a_t_h in the buffer
_b_u_f, which has size _b_u_f_s_i_z. RReeaaddlliinnkk does not append a NUL character to
_b_u_f.
RREETTUURRNN VVAALLUUEESS
The call returns the count of characters placed in the buffer if it suc
ceeds, or a 1 if an error occurs, placing the error code in the global
variable _e_r_r_n_o.
EERRRROORRSS
RReeaaddlliinnkk() will fail if:
[ENOTDIR] A component of the path prefix is not a directory.
[EINVAL] The pathname contains a character with the highorder bit
set.
[ENAMETOOLONG]
A component of a pathname exceeded 255 characters, or an
entire path name exceeded 1023 characters.
[ENOENT] The named file does not exist.
[EACCES] Search permission is denied for a component of the path
prefix.
[ELOOP] Too many symbolic links were encountered in translating the
pathname.
[EINVAL] The named file is not a symbolic link.
[EIO] An I/O error occurred while reading from the file system.
[EFAULT] _B_u_f extends outside the process's allocated address space.
SSEEEE AALLSSOO
stat(2), lstat(2), symlink(2)
HHIISSTTOORRYY
The rreeaaddlliinnkk function call appeared in 4.2BSD.
4.2 Berkeley Distribution March 10, 1991 1