Subversion Repositories planix.SVN

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

void
main(int argc, char **argv)
{
        char *f, *b, *s;
        int n;

        if(argc < 2 || argc > 3){
                fprintf(stderr, "Usage: basename string [suffix]\n");
                exit(1);
        }
        s = argv[1];
        b = s + strlen(s) - 1;
        while(b > s && *b == '/')
                b--;
        *++b = 0;
        if(b == s+1 && s[0] == '/') {
                printf("/");
                exit(0);
        }
        /* now b is after last char of string, trailing slashes removed */

        for(f = b; f >= s; f--)
                if(*f == '/'){
                        f++;
                        break;
                }
        if(f < s)
                f = s;

        /* now f is first char after last remaining slash, or first char */

        if(argc == 3){
                n = strlen(argv[2]);
                if(n < b-f && strncmp(b-n, argv[2], n) == 0){
                        b -= n;
                        *b = 0;
                }
        }
        printf("%s\n", f);
        exit(0);
}