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Man Pages


Manual Reference Pages  -  BASENAME (3)

NAME

basename - extract the base portion of a pathname

CONTENTS

Synopsis
Description
Implementation Notes
Return Values
Errors
See Also
Standards
History
Authors
Caveats

SYNOPSIS


.In libgen.h char * basename const char *path char * basename_r const char *path char *bname

DESCRIPTION

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.

IMPLEMENTATION NOTES

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 threaded applications.

RETURN VALUES

On successful completion, basename and basename_r return pointers to the last component of path.

If they fail, a null pointer is returned and the global variable errno is set to indicate the error.

ERRORS

The following error codes may be set in errno:
[ENAMETOOLONG]
  The path component to be returned was larger than MAXPATHLEN.

SEE ALSO

basename(1), dirname(1), dirname(3)

STANDARDS

The basename function conforms to -xpg4.2.

HISTORY

The basename function first appeared in
.Ox 2.2 and
.Fx 4.2 .

AUTHORS


.An Todd C. Miller

CAVEATS

basename returns a pointer to internal static storage space that will be overwritten by subsequent calls.

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.

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