Arguments

 

dir_spec

   A null-terminated character string naming a directory in either
   an OpenVMS or UNIX style specification.
 

 . . .

   This argument is an VSI C extension available when not
   defining any of the standards-related feature-test macros and not
   compiling in strict ANSI C mode (/STANDARD=ANSI89). The argument
   is an optional flag of type int that is significant only when
   calling chdir from USER mode.

   If the value of the flag is 1, the new directory is effective
   across images. If the value is not 1, the original default
   directory is restored when the image exits.