libgen.h File Reference

String routines. More...

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Functions
int	dirname (const char *path, char *buffer, size_t buflen)
	Extracts the parent directory of the given path and saves it inside the given buffer, e.g., from "/home/user/test.txt" it extracts "/home/user". If the path does not contain a '/', it will return ".". More...
const char *	basename (const char *path)
	Extract the component after the final '/'. More...
char *	realpath (const char *path, char *buffer, size_t buflen)
	Return the canonicalized absolute pathname. More...

Detailed Description

String routines.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.

Function Documentation

basename()

const char* basename

(

const char *

path

)

Extract the component after the final '/'.

Parameters

path	the path from which we extract the final component.

Returns

a pointer after the final '/', or path itself it none was found.

dirname()

int dirname	(	const char *	path,
		char *	buffer,
		size_t	buflen
	)

Extracts the parent directory of the given path and saves it inside the given buffer, e.g., from "/home/user/test.txt" it extracts "/home/user". If the path does not contain a '/', it will return ".".

Parameters

path	the path we are parsing.
buffer	the buffer where we save the directory name.
buflen	the length of the buffer.

Returns

1 if succesfull, or 0 if the buffer cannot contain the path.

realpath()

char* realpath	(	const char *	path,
		char *	buffer,
		size_t	buflen
	)

Return the canonicalized absolute pathname.

Parameters

path	the path we are canonicalizing.
buffer	where we will store the canonicalized path.
buflen	the size of the buffer.

Returns

If there is no error, realpath() returns a pointer to the buffer. Otherwise, it returns NULL, the contents of the array buffer are undefined, and errno is set to indicate the error.