Basename() function : C

[Ranjar]

Hello, Friends. I have the knowledge of the C language. But I don't know about the Basename() function in the C language. So, I would like to know about the Basename() function. What is the basic use of the Basename() function ? How the Basename() function can be used in the program ? So, Can anyone is there who has the answer of my question. If you have the answer then reply me as soon as you can,Plz!

[absolute55]

The Basename() function can be equivalent to that of the basename utility 1003.2. The Basename() function can returns the first character of string if no slashes are found or a pointer to the string of first character following the last slash (/) found in string. The syntax of the Basename() function is as follows :
#include <unistd.h>
char *basename( char *string );

[MindSpace]

The following example is sufficient for you to know about the Basename() function :
#include <unistd.h>
#include <stdio.h>
int main( void )
{
printf( "%s\n", basename( " two/three/four" ) );
printf( "%s\n", basename( "two" ) );
printf( "%s\n", basename( "two/" ) );
return (EXIT_SUCCESS);
}
I hope you understood from the above example.

[Modifier]

I suggest you to carefully go through the following code of lines:
#if HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#if STDC_HEADERS
# include <string.h>
#else
# ifndef HAVE_STRRCHR
# define strrchr rindex
# else
extern char *strrchr (const char*, int);
# endif /* !HAVE_STRRCHR */
extern char *strrchr();
#endif /* STDC_HEADERS */
#if !HAVE_BASENAME
char*
basename (char* path)
{
char *ptr = strrchr (path, '/');
return ptr ? ptr + 1 : (char*)path;
}
#endif

[Praetor]

I think the Basename() function returns the component that is last from the pathname pointed to by path, deleting any trailing " / " characters. A pointer to the string " / " can be returned, if path consists entirely of " / " characters. A pointer to the string "." can be returned, if path can be a empty string or the NULL pointer. To path spoofing the Basename() function is vulnerable. For example :
int main()
{
struct sta stat;
char *pth="/etc/passwd";
char *lname;
lname=basename(pth);
return 0;
}