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OpenDarwin 7.2.1 - man page for tcl_translatefilename (opendarwin section 3)

Tcl_TranslateFileName(3)			Tcl Library Procedures			     Tcl_TranslateFileName(3)


Tcl_TranslateFileName - convert file name to native form and replace tilde with home directory
#include <tcl.h> char * Tcl_TranslateFileName(interp, name, bufferPtr)
Tcl_Interp *interp (in) Interpreter in which to report an error, if any. CONST char *name (in) File name, which may start with a ``~''. Tcl_DString *bufferPtr (in/out) If needed, this dynamic string is used to store the new file name. 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. _________________________________________________________________
This utility procedure translates a file name to a form suitable for passing to the local operating system. It converts network names into native form and does tilde substitution. If Tcl_TranslateFileName has to do tilde substitution or translate the name then it uses the dynamic string at *bufferPtr to hold the new string it generates. After Tcl_TranslateFileName returns a non-NULL result, the caller must eventually invoke Tcl_DStringFree to free any information placed in *bufferPtr. The caller need not know whether or not Tcl_TranslateFileName actually used the string; Tcl_TranslateFileName initializes *bufferPtr even if it doesn't use it, so the call to Tcl_DStringFree will be safe in either case. If an error occurs (e.g. because there was no user by the given name) then NULL is returned and an error mes- sage will be left in the interpreter's result. When an error occurs, Tcl_TranslateFileName frees the dynamic string itself so that the caller need not call Tcl_DStringFree. The caller is responsible for making sure that the interpreter's result has its default empty value when Tcl_TranslateFileName is invoked.
file name, home directory, tilde, translate, user Tcl 8.1 Tcl_TranslateFileName(3)

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