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-
- GETWD(3) UNIX Programmer's Manual GETWD(3)
-
- NNAAMMEE
- ggeettwwdd - get working directory pathname
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<ssttddiioo..hh>>
-
- _c_h_a_r _*
- ggeettccwwdd(_c_h_a_r _*_b_u_f, _s_i_z_e___t _s_i_z_e)
-
- _c_h_a_r _*
- ggeettwwdd(_c_h_a_r _*_b_u_f)
-
- DDEESSCCRRIIPPTTIIOONN
- The ggeettccwwdd() function copies the absolute pathname of the current working
- directory into the memory referenced by _b_u_f and returns a pointer to _b_u_f.
- The _s_i_z_e argument is the size, in bytes, of the array referenced by _b_u_f.
-
- If _b_u_f is NULL, space is allocated as necessary to store the pathname.
- This space may later be free(3)'d.
-
- The function ggeettwwdd() is a compatibility routine which calls ggeettccwwdd() with
- its _b_u_f argument and a size of MAXPATHLEN (as defined in the include file
- <_s_y_s_/_p_a_r_a_m_._h>). Obviously, _b_u_f should be at least MAXPATHLEN bytes in
- length.
-
- These routines have traditionally been used by programs to save the name
- of a working directory for the purpose of returning to it. A much faster
- and less errorprone method of accomplishing this is to open the current
- directory (`.') and use the fchdir(2) function to return.
-
- RREETTUURRNN VVAALLUUEESS
- Upon successful completion, a pointer to the pathname is returned. Oth
- erwise a NULL pointer is returned and the global variable _e_r_r_n_o is set to
- indicate the error. In addition, ggeettwwdd() copies the error message asso
- ciated with _e_r_r_n_o into the memory referenced by _b_u_f.
-
- EERRRROORRSS
- The ggeettccwwdd() function will fail if:
-
- [EACCESS] Read or search permission was denied for a component of the
- pathname.
-
- [EINVAL] The _s_i_z_e argument is zero.
-
- [ENOENT] A component of the pathname no longer exists.
-
- [ENOMEM] Insufficient memory is available.
-
- [ERANGE] The _s_i_z_e argument is greater than zero but smaller than the
- length of the pathname plus 1.
-
- SSEEEE AALLSSOO
- chdir(2), fchdir(2), malloc(3), strerror(3)
-
- SSTTAANNDDAARRDDSS
- The ggeettccwwdd() function conforms to ANSI C3.1591989 (``ANSI C''). The
- ability to specify a NULL pointer and have ggeettccwwdd() allocate memory as
- necessary is an extension.
-
- HHIISSTTOORRYY
- The ggeettwwdd() function appeared in 4.0BSD.
-
- BBUUGGSS
- The ggeettwwdd() function does not do sufficient error checking and is not
- able to return very long, but valid, paths. It is provided for compati
- bility.
-
- 4.2 Berkeley Distribution April 19, 1991 2
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