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BASENAME(3) BSD Library Functions Manual BASENAME(3)
basename -- extract the base portion of a pathname
basename(const char *path);
basename_r(const char *path, char *bname);
The basename() function returns the last component from the pathname pointed to by path,
deleting any trailing '/' characters. If path consists entirely of '/' characters, a
pointer to the string "/" is returned. If path is a null pointer or the empty string, a
pointer to the string "." is returned.
The basename_r() variation accepts a buffer of at least MAXPATHLEN bytes in which to store
the resulting component.
The basename() function returns a pointer to internal storage space allocated on the first
call that will be overwritten by subsequent calls. basename_r() is therefore preferred for
On successful completion, basename() and basename_r() return pointers to the last component
If they fail, a null pointer is returned and the global variable errno is set to indicate
The following error codes may be set in errno:
[ENAMETOOLONG] The path component to be returned was larger than MAXPATHLEN.
basename(1), dirname(1), dirname(3)
The basename() function conforms to X/Open Portability Guide Issue 4, Version 2
The basename() function first appeared in OpenBSD 2.2 and FreeBSD 4.2.
Todd C. Miller
basename() returns a pointer to internal static storage space that will be overwritten by
Other vendor implementations of basename() may modify the contents of the string passed to
basename(); this should be taken into account when writing code which calls this function if
portability is desired.
BSD March 31, 2010 BSD
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