Tcl_SplitPath, Tcl_JoinPath, Tcl_GetPathType − manipulate platform-dependent file paths


#include <tcl.h>

Tcl_SplitPath(path, argcPtr, argvPtr)

char *
(argc, argv, resultPtr)



const char *path (in)

File path in a form appropriate for the current platform (see the filename manual entry for acceptable forms for path names).

int *argcPtr (out)

Filled in with number of path elements in path.

const char ***argvPtr (out)

*argvPtr will be filled in with the address of an array of pointers to the strings that are the extracted elements of path. There will be *argcPtr valid entries in the array, followed by a NULL entry.

int argc (in)

Number of elements in argv.

const char *const *argv (in)

Array of path elements to merge together into a single path.

Tcl_DString *resultPtr (in/out)

A pointer to an initialized Tcl_DString to which the result of Tcl_JoinPath will be appended.



These procedures have been superceded by the objectified procedures in the FileSystem man page, which are more efficient.

These procedures may be used to disassemble and reassemble file paths in a platform independent manner: they provide C-level access to the same functionality as the file split, file join, and file pathtype commands.

Tcl_SplitPath breaks a path into its constituent elements, returning an array of pointers to the elements using argcPtr and argvPtr. The area of memory pointed to by *argvPtr is dynamically allocated; in addition to the array of pointers, it also holds copies of all the path elements. It is the caller’s responsibility to free all of this storage. For example, suppose that you have called Tcl_SplitPath with the following code:

int argc;
char *path;
char **argv;
Tcl_SplitPath(string, &argc, &argv);

Then you should eventually free the storage with a call like the following:

Tcl_Free((char *) argv);

Tcl_JoinPath is the inverse of Tcl_SplitPath: it takes a collection of path elements given by argc and argv and generates a result string that is a properly constructed path. The result string is appended to resultPtr. ResultPtr must refer to an initialized Tcl_DString.

If the result of Tcl_SplitPath is passed to Tcl_JoinPath, the result will refer to the same location, but may not be in the same form. This is because Tcl_SplitPath and Tcl_JoinPath eliminate duplicate path separators and return a normalized form for each platform.

Tcl_GetPathType returns the type of the specified path, where Tcl_PathType is one of TCL_PATH_ABSOLUTE, TCL_PATH_RELATIVE, or TCL_PATH_VOLUME_RELATIVE. See the filename manual entry for a description of the path types for each platform.


file, filename, join, path, split, type


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.