dirname.c

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#include <sys/types.h>
#include <stdio.h>
#include <stddef.h>
#include <limits.h>
#include <libgen.h>

char *dirname(char *s)
{
        static char ret[PATH_MAX];
        int sep;
        int i;

        sep = 0;
        for (sep = i = 0; s[i]; i++) {
                if (s[i] == '/' && s[i+1] != '\0') {
                        sep = i;
                }

                ret[i] = s[i];
        }

        if (sep) {
                ret[sep] = '\0';
        } else {
                if (i > 1 && (s[0] != '/' || s[1] != '\0')) {
                        ret[0] = '.';
                }

                ret[1] = '\0';
        }

        return ret;
}

/* End of a file */