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Man Pages


Manual Reference Pages  -  DIRNAME (3)

NAME

dirname - extract the directory part of a pathname

CONTENTS

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

SYNOPSIS


.In libgen.h char * dirname const char *path

DESCRIPTION

The dirname function is the converse of basename(3); it returns a pointer to the parent directory of the pathname pointed to by path. Any trailing '/' characters are not counted as part of the directory name. If path is a null pointer, the empty string, or contains no '/' characters, dirname returns a pointer to the string ".", signifying the current directory.

IMPLEMENTATION NOTES

The dirname function returns a pointer to internal storage space allocated on the first call that will be overwritten by subsequent calls.

Other vendor implementations of dirname may modify the contents of the string passed to dirname; this should be taken into account when writing code which calls this function if portability is desired.

RETURN VALUES

On successful completion, dirname returns a pointer to the parent directory of path.

If dirname fails, 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), basename(3)

STANDARDS

The dirname function conforms to -xpg4.2.

HISTORY

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

AUTHORS


.An Todd C. Miller
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