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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. /* TODO: Options that people would expect, such as not creating the file if
  32.  * it doesn't exist, specifying the access time, etc */
  33.  
  34. #include <stdio.h>
  35. #include <stdlib.h>
  36. #include <unistd.h>
  37. #include <fcntl.h>
  38. #include <dirent.h>
  39. #include <sys/types.h>
  40.  
  41. #include "config.h"
  42. #include "errors.h"
  43. #include "util.h"
  44. #include "entry.h"
  45. #include "touch.h"
  46. #include "cmds.h"
  47.  
  48. static char *cmdname = "touch";
  49.  
  50. /* Dispays help for touch in various levels */
  51. void * help_cmd_touch(unsigned int level)
  52. {
  53.     if (level == HELP_SHORT) {
  54.         printf("`%s' updates access times for files\n", cmdname);
  55.     } else {
  56.         help_cmd_touch(HELP_SHORT);
  57.         printf("  `%s' <file>, if the file does not exist it will be "
  58.                 "created\n", cmdname);
  59.     }
  60.  
  61.     return CMD_VOID;
  62. }
  63.  
  64. /* Main entry point for touch, accepts an array of arguments */
  65. int * cmd_touch(char **argv)
  66. {
  67.     unsigned int argc, i = 0, ret = 0;
  68.     int fd;
  69.     char *buff = NULL;
  70.  
  71.     DIR *dirp;
  72.  
  73.     /* Count the arguments */
  74.     for (argc = 0; argv[argc] != NULL; argc ++);
  75.  
  76.     if (argc == 1) {
  77.         printf("%s - incorrect number of arguments. Try `help %s extended'\n",
  78.             cmdname, cmdname);
  79.         return CMD_FAILURE;
  80.     }
  81.  
  82.     for (i = 1; i < argc; i ++) {
  83.         buff = cli_strdup(argv[i]);
  84.         dirp = opendir(buff);
  85.         if (dirp) {
  86.             cli_error(CL_ENOTSUP, "%s is a directory", buff);
  87.             closedir(dirp);
  88.             ret ++;
  89.             continue;
  90.         }
  91.  
  92.         fd = open(buff, O_RDWR | O_CREAT);
  93.         if (fd < 0) {
  94.             cli_error(CL_EFAIL, "Could not update / create %s ", buff);
  95.             ret ++;
  96.             continue;
  97.         } else
  98.             close(fd);
  99.  
  100.         free(buff);
  101.     }
  102.  
  103.     if (ret)
  104.         return CMD_FAILURE;
  105.     else
  106.         return CMD_SUCCESS;
  107. }
  108.  
  109.