/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

extern int errno;

main(argc, argv)
    int argc;
    char **argv;
{
    extern int optind;
    int ch, exitval, pflag;

    pflag = 0;
    while ((ch = getopt(argc, argv, "p")) != EOF)
        switch(ch) {
        case 'p':
            pflag = 1;
            break;
        case '?':
        default:
            usage();
        }

    if (!*(argv += optind))
        usage();

    for (exitval = 0; *argv; ++argv)
        if (pflag)
            exitval |= build(*argv);
        else if (mkdir(*argv, 0777) < 0) {
            (void)fprintf(stderr, "mkdir: %s: %s\n",
                *argv, strerror(errno));
            exitval = 1;
        }
    exit(exitval);
}

build(path)
    char *path;
{
    register char *p;
    struct stat sb;
    int create, ch;

    for (create = 0, p = path;; ++p)
        if (!*p || *p  == '/') {
            ch = *p;
            *p = '\0';
            if (stat(path, &sb)) {
                if (errno != ENOENT || mkdir(path, 0777) < 0) {
                    (void)fprintf(stderr, "mkdir: %s: %s\n",
                        path, strerror(errno));
                    return(1);
                }
                create = 1;
            }
            if (!(*p = ch))
                break;
        }
    if (!create) {
        (void)fprintf(stderr, "mkdir: %s: %s\n", path,
            strerror(EEXIST));
        return(1);
    }
    return(0);
}

usage()
{
    (void)fprintf(stderr, "usage: mkdir [-p] dirname ...\n");
    exit(1);
}
