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  1. /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
  2.  * All rights reserved.
  3.  *
  4.  * Redistribution and use in source and binary forms, with or without
  5.  * modification, are permitted provided that the following conditions are met:
  6.  *
  7.  * Redistributions of source code must retain the above copyright notice, this
  8.  * list of conditions and the following disclaimer.
  9.  *
  10.  * Redistributions in binary form must reproduce the above copyright notice,
  11.  * this list of conditions and the following disclaimer in the documentation
  12.  * and/or other materials provided with the distribution.
  13.  *
  14.  * Neither the name of the original program's authors nor the names of its
  15.  * contributors may be used to endorse or promote products derived from this
  16.  * software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28.  * POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. #include <stdio.h>
  32. #include <stdlib.h>
  33. #include <unistd.h>
  34. #include <getopt.h>
  35. #include <string.h>
  36. #include <fcntl.h>
  37. #include "config.h"
  38. #include "util.h"
  39. #include "errors.h"
  40. #include "entry.h"
  41. #include "cp.h"
  42. #include "cmds.h"
  43.  
  44. #define CP_VERSION "0.0.1"
  45. #define CP_DEFAULT_BUFLEN  1024
  46.  
  47. static const char *cmdname = "cp";
  48.  
  49. static struct option const long_options[] = {
  50.     { "buffer", required_argument, 0, 'b' },
  51.     { "force", no_argument, 0, 'f' },
  52.     { "recursive", no_argument, 0, 'r' },
  53.     { "help", no_argument, 0, 'h' },
  54.     { "version", no_argument, 0, 'v' },
  55.     { "verbose", no_argument, 0, 'V' },
  56.     { 0, 0, 0, 0 }
  57. };
  58.  
  59. static int strtoint(const char *s1)
  60. {
  61.     long t1;
  62.  
  63.     if (-1 == (t1 = strtol(s1, (char **) NULL, 10)))
  64.         return -1;
  65.  
  66.     if (t1 <= 0)
  67.         return -1;
  68.  
  69.     return (int) t1;
  70. }
  71.  
  72. static int64_t copy_file(const char *src, const char *dest, size_t blen, int vb)
  73. {
  74.     int fd1, fd2, bytes = 0;
  75.     off_t total = 0;
  76.     int64_t copied = -1;
  77.     char *buff = NULL;
  78.  
  79.     if (vb)
  80.         printf("Copying %s to %s\n", src, dest);
  81.  
  82.     if (-1 == (fd1 = open(src, O_RDONLY))) {
  83.         printf("Unable to open source file %s\n", src);
  84.         return copied;
  85.     }
  86.  
  87.     if (-1 == (fd2 = open(dest, O_CREAT))) {
  88.         printf("Unable to open destination file %s\n", dest);
  89.         return copied;
  90.     }
  91.  
  92.     total = lseek(fd1, 0, SEEK_END);
  93.  
  94.     if (vb)
  95.         printf("%d bytes to copy\n", total);
  96.  
  97.     lseek(fd1, 0, SEEK_SET);
  98.  
  99.     if (NULL == (buff = (char *) malloc(blen + 1))) {
  100.         printf("Unable to allocate enough memory to read %s\n",
  101.             src);
  102.         goto out;
  103.     }
  104.  
  105.     do {
  106.         if (-1 == (bytes = read(fd1, buff, blen)))
  107.             break;
  108.         /* We read a terminating NULL */
  109.         if (0 == bytes) {
  110.             copied ++;
  111.             break;
  112.         }
  113.         copied += bytes;
  114.         write(fd2, buff, blen);
  115.     } while (bytes > 0);
  116.  
  117.     if (bytes == -1) {
  118.         printf("Error copying %s\n", src);
  119.         copied = bytes;
  120.         goto out;
  121.     }
  122.  
  123. out:
  124.     close(fd1);
  125.     close(fd2);
  126.     if (buff)
  127.         free(buff);
  128.     return copied;
  129. }
  130.  
  131. void help_cmd_cp(unsigned int level)
  132. {
  133.     if (level == HELP_SHORT) {
  134.         printf("`%s' copies files and directories\n", cmdname);
  135.     } else {
  136.         help_cmd_cp(HELP_SHORT);
  137.         printf(
  138.         "Usage:  %s [options] <source> <dest>\n"
  139.         "Options: (* indicates not yet implemented)\n"
  140.         "  -h, --help       A short option summary\n"
  141.         "  -v, --version    Print version information and exit\n"
  142.         "* -V, --verbose    Be annoyingly noisy about what's being done\n"
  143.         "* -f, --force      Do not complain when <dest> exists\n"
  144.         "* -r, --recursive  Copy entire directories\n"
  145.         "  -b, --buffer ## Set the read buffer size to ##\n"
  146.         "Currently, %s is under development, some options might not work.\n",
  147.         cmdname, cmdname);
  148.     }
  149.  
  150.     return;
  151. }
  152.  
  153. int cmd_cp(char **argv)
  154. {
  155.     unsigned int argc, buffer = 0, verbose = 0;
  156.     int c, opt_ind;
  157.     int64_t ret;
  158.  
  159.     argc = cli_count_args(argv);
  160.  
  161.     for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
  162.         c = getopt_long(argc, argv, "hvVfrb:", long_options, &opt_ind);
  163.         switch (c) {
  164.         case 'h':
  165.             help_cmd_cp(1);
  166.             return CMD_SUCCESS;
  167.         case 'v':
  168.             printf("%d\n", CP_VERSION);
  169.             return CMD_SUCCESS;
  170.         case 'V':
  171.             verbose = 1;
  172.             break;
  173.         case 'f':
  174.             break;
  175.         case 'r':
  176.             break;
  177.         case 'b':
  178.             if (-1 == (buffer = strtoint(optarg))) {
  179.                 printf("%s: Invalid buffer specification, "
  180.                     "(should be a number greater than zero)\n",
  181.                     cmdname);
  182.                 return CMD_FAILURE;
  183.             }
  184.             if (verbose)
  185.                 printf("Buffer = %d\n", buffer);
  186.             break;
  187.         }
  188.     }
  189.  
  190.     if (buffer == 0)
  191.         buffer = CP_DEFAULT_BUFLEN;
  192.  
  193.     argc -= optind;
  194.  
  195.     if (argc != 2) {
  196.         printf("%s: invalid number of arguments. Try %s --help\n",
  197.             cmdname, cmdname);
  198.         return CMD_FAILURE;
  199.     }
  200.  
  201.     ret = copy_file(argv[optind], argv[optind + 1], buffer, verbose);
  202.  
  203.     if (verbose)
  204.         printf("%d bytes copied\n", ret);
  205.  
  206.     if (ret <= 0)
  207.         return CMD_SUCCESS;
  208.     else
  209.         return CMD_FAILURE;
  210. }
  211.  
  212.