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//
// mkdir.c
//
// Make directories
//
// Copyright (C) 2012 Michael Ringgaard. 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. Neither the name of the project 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 <string.h>
#include <stdlib.h>
#include <shlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>

struct options {
  int makepath;
  char *mode;
};

static int make_directory(char *path, struct options *opts) {
  char *p;
  int mode;

  if (opts->mode) {
    mode = parse_symbolic_mode(opts->mode, 0);
    if (mode == -1) {
      fprintf(stderr, "%s: invalid mode\n", opts->mode);
      return 1;
    }
  } else {
    mode = 0777;
  }

  if (mkdir(path, mode) < 0) {
    if (!opts->makepath) {
      perror(path);
      return 1;
    }

    p = path;
    while (p) {
      p = strchr(p, '/');
      if (p) *p = 0;
      if (mkdir(path, mode) < 0 && errno != EEXIST) {
        perror(path);
        return 1;
      }
      if (p) *p++ = '/';
    }
  }

  return 0;
}

static void usage() {
  fprintf(stderr, "usage: mkdir [OPTIONS] DIR...\n\n");
  fprintf(stderr, "  -p      Create any missing intermediate pathname components\n");
  fprintf(stderr, "  -m mode Set file permission mode\n");
  exit(1);
}

shellcmd(mkdir) {
  struct options opts;
  int c;
  int i;
  int rc;

  // Parse command line options
  memset(&opts, 0, sizeof(struct options));
  while ((c = getopt(argc, argv, "pm:?")) != EOF) {
    switch (c) {
      case 'p':
        opts.makepath = 1;
        break;

      case 'm':
        opts.mode = optarg;
        break;

      case '?':
      default:
        usage();
    }
  }
  if (optind == argc) usage();

  for (i = optind; i < argc; i++) {
    rc = make_directory(argv[i], &opts);
    if (rc != 0) return 1;
  }

  return 0;
}