mkdir.c

/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 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.
 *
 * Neither the name of the original program's authors 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <stdarg.h>
#include <str.h>

#include "config.h"
#include "errors.h"
#include "util.h"
#include "entry.h"
#include "mkdir.h"
#include "cmds.h"

#define MKDIR_VERSION "0.0.1"

static const char *cmdname = "mkdir";

static struct option const long_options[] = {
        {"parents", no_argument, 0, 'p'},
        {"verbose", no_argument, 0, 'v'},
        {"mode", required_argument, 0, 'm'},
        {"help", no_argument, 0, 'h'},
        {"version", no_argument, 0, 'V'},
        {"follow", no_argument, 0, 'f'},
        {0, 0, 0, 0}
};


void help_cmd_mkdir(unsigned int level)
{
        if (level == HELP_SHORT) {
                printf("`%s' creates a new directory\n", cmdname);
        } else {
                help_cmd_mkdir(HELP_SHORT);
                printf(
                "Usage:  %s [options] <path>\n"
                "Options:\n"
                "  -h, --help       A short option summary\n"
                "  -V, --version    Print version information and exit\n"
                "  -p, --parents    Create needed parents for <path>\n"
                "  -m, --mode       Set permissions to [mode] (UNUSED)\n"
                "  -v, --verbose    Be extremely noisy about what is happening\n"
                "  -f, --follow     Go to the new directory once created\n"
                "Currently, %s is under development, some options don't work.\n",
                cmdname, cmdname);
        }

        return;
}

/* This is kind of clunky, but effective for now */
static unsigned int
create_directory(const char *path, unsigned int p)
{
        DIR *dirp;
        char *tmp = NULL, *buff = NULL, *wdp = NULL;
        char *dirs[255];
        unsigned int absolute = 0, i = 0, ret = 0;

        /* Its a good idea to allocate path, plus we (may) need a copy of
         * path to tokenize if parents are specified */
        if (NULL == (tmp = str_dup(path))) {
                cli_error(CL_ENOMEM, "%s: path too big?", cmdname);
                return 1;
        }

        if (NULL == (wdp = (char *) malloc(PATH_MAX))) {
                cli_error(CL_ENOMEM, "%s: could not alloc cwd", cmdname);
                free(tmp);
                return 1;
        }

        /* The only reason for wdp is to be (optionally) verbose */
        getcwd(wdp, PATH_MAX);

        /* Typical use without specifying the creation of parents */
        if (p == 0) {
                dirp = opendir(tmp);
                if (dirp) {
                        cli_error(CL_EEXISTS, "%s: can not create %s, try -p", cmdname, path);
                        closedir(dirp);
                        goto finit;
                }
                if (-1 == (mkdir(tmp, 0))) {
                        cli_error(CL_EFAIL, "%s: could not create %s", cmdname, path);
                        goto finit;
                }
        }

        /* Parents need to be created, path has to be broken up */

        /* See if path[0] is a slash, if so we have to remember to append it */
        if (tmp[0] == '/')
                absolute = 1;

        /* TODO: Canonify the path prior to tokenizing it, see below */
        dirs[i] = strtok(tmp, "/");
        while (dirs[i] && i < 255)
                dirs[++i] = strtok(NULL, "/");

        if (NULL == dirs[0])
                return 1;

        if (absolute == 1) {
                asprintf(&buff, "/%s", dirs[0]);
                mkdir(buff, 0);
                chdir(buff);
                free(buff);
                getcwd(wdp, PATH_MAX);
                i = 1;
        } else {
                i = 0;
        }

        while (dirs[i] != NULL) {
                /* Sometimes make or scripts conjoin odd paths. Account for something
                 * like this: ../../foo/bar/../foo/foofoo/./bar */
                if (!str_cmp(dirs[i], "..") || !str_cmp(dirs[i], ".")) {
                        if (0 != (chdir(dirs[i]))) {
                                cli_error(CL_EFAIL, "%s: impossible path: %s",
                                        cmdname, path);
                                ret ++;
                                goto finit;
                        }
                        getcwd(wdp, PATH_MAX);
                } else {
                        if (-1 == (mkdir(dirs[i], 0))) {
                                cli_error(CL_EFAIL,
                                        "%s: failed at %s/%s", wdp, dirs[i]);
                                ret ++;
                                goto finit;
                        }
                        if (0 != (chdir(dirs[i]))) {
                                cli_error(CL_EFAIL, "%s: failed creating %s\n",
                                        cmdname, dirs[i]);
                                ret ++;
                                break;
                        }
                }
                i++;
        }
        goto finit;

finit:
        free(wdp);
        free(tmp);
        return ret;
}

int cmd_mkdir(char **argv)
{
        unsigned int argc, create_parents = 0, i, ret = 0, follow = 0;
        unsigned int verbose = 0;
        int c, opt_ind;
        char *cwd;

        argc = cli_count_args(argv);

        for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
                c = getopt_long(argc, argv, "pvhVfm:", long_options, &opt_ind);
                switch (c) {
                case 'p':
                        create_parents = 1;
                        break;
                case 'v':
                        verbose = 1;
                        break;
                case 'h':
                        help_cmd_mkdir(HELP_LONG);
                        return CMD_SUCCESS;
                case 'V':
                        printf("%s\n", MKDIR_VERSION);
                        return CMD_SUCCESS;
                case 'f':
                        follow = 1;
                        break;
                case 'm':
                        printf("%s: [W] Ignoring mode %s\n", cmdname, optarg);
                        break;
                }
        }

        argc -= optind;

        if (argc < 1) {
                printf("%s - incorrect number of arguments. Try `%s --help'\n",
                        cmdname, cmdname);
                return CMD_FAILURE;
        }

        if (NULL == (cwd = (char *) malloc(PATH_MAX))) {
                cli_error(CL_ENOMEM, "%s: could not allocate cwd", cmdname);
                return CMD_FAILURE;
        }

        memset(cwd, 0, sizeof(cwd));
        getcwd(cwd, PATH_MAX);

        for (i = optind; argv[i] != NULL; i++) {
                if (verbose == 1)
                        printf("%s: creating %s%s\n",
                                cmdname, argv[i],
                                create_parents ? " (and all parents)" : "");
                ret += create_directory(argv[i], create_parents);
        }

        if (follow == 0)
                chdir(cwd);

        free(cwd);

        if (ret)
                return CMD_FAILURE;
        else
                return CMD_SUCCESS;
}

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