CHDIR(3)                   POSIX Programmer's Manual                  CHDIR(3)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       chdir -- change working directory

SSYYNNOOPPSSIISS
       #include <unistd.h>

       int chdir(const char *_p_a_t_h);

DDEESSCCRRIIPPTTIIOONN
       The _c_h_d_i_r() function shall cause the directory named by the pathname
       pointed to by the _p_a_t_h argument to become the current working
       directory; that is, the starting point for path searches for pathnames
       not beginning with ''//''.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, 0 shall be returned. Otherwise, -1 shall be
       returned, the current working directory shall remain unchanged, and
       _e_r_r_n_o shall be set to indicate the error.

EERRRROORRSS
       The _c_h_d_i_r() function shall fail if:

       EEAACCCCEESS Search permission is denied for any component of the pathname.

       EELLOOOOPP  A loop exists in symbolic links encountered during resolution of
              the _p_a_t_h argument.

       EENNAAMMEETTOOOOLLOONNGG
              The length of a component of a pathname is longer than
              {NAME_MAX}.

       EENNOOEENNTT A component of _p_a_t_h does not name an existing directory or _p_a_t_h
              is an empty string.

       EENNOOTTDDIIRR
              A component of the pathname names an existing file that is
              neither a directory nor a symbolic link to a directory.

       The _c_h_d_i_r() function may fail if:

       EELLOOOOPP  More than {SYMLOOP_MAX} symbolic links were encountered during
              resolution of the _p_a_t_h argument.

       EENNAAMMEETTOOOOLLOONNGG
              The length of a pathname exceeds {PATH_MAX}, or pathname
              resolution of a symbolic link produced an intermediate result
              with a length that exceeds {PATH_MAX}.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
   CChhaannggiinngg tthhee CCuurrrreenntt WWoorrkkiinngg DDiirreeccttoorryy
       The following example makes the value pointed to by ddiirreeccttoorryy, //ttmmpp,
       the current working directory.


           #include <unistd.h>
           ...
           char *directory = "/tmp";
           int ret;

           ret = chdir (directory);

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       The _c_h_d_i_r() function only affects the working directory of the current
       process.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _g_e_t_c_w_d()

       The Base Definitions volume of POSIX.1-2017, <<uunniissttdd..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  In the event of any discrepancy between this version and the
       original IEEE and The Open Group Standard, the original IEEE and The
       Open Group Standard is the referee document. The original Standard can
       be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017                             CHDIR(3)
