CentOS 7.0 - man page for tcl_getcwd (centos section 3)

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Tcl_GetCwd(3)			      Tcl Library Procedures			    Tcl_GetCwd(3)


       Tcl_GetCwd, Tcl_Chdir - manipulate the current working directory

       #include <tcl.h>

       char *
       Tcl_GetCwd(interp, bufferPtr)


       Tcl_Interp *interp (in)		    Interpreter in which to report an error, if any.

       Tcl_DString *bufferPtr (in/out)	    This  dynamic  string  is  used  to store the current
					    working directory.	At the time of the call it should
					    be uninitialized or free.  The caller must eventually
					    call Tcl_DStringFree to free up anything stored here.

       char *path (in)			    File path in UTF-8 format.

       These procedures may be used to manipulate the current working directory for the  applica-
       tion.  They provide C-level access to the same functionality as the Tcl pwd command.

       Tcl_GetCwd  returns a pointer to a string specifying the current directory, or NULL if the
       current directory could not be determined.  If NULL is returned, an error message is  left
       in  the	interp's  result.   Storage  for the result string is allocated in bufferPtr; the
       caller must call Tcl_DStringFree() when the result is no longer needed.	The format of the
       path is UTF-8.

       Tcl_Chdir  changes  the	applications  current working directory to the value specified in
       path.  The format of the passed in string must be UTF-8.  The function returns -1 on error
       or 0 on success.


Tcl					       8.1				    Tcl_GetCwd(3)
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