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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 <fcntl.h>
  35. #include <dirent.h>
  36. #include "config.h"
  37. #include "errors.h"
  38. #include "util.h"
  39. #include "entry.h"
  40. #include "rm.h"
  41. #include "cmds.h"
  42.  
  43. static char *cmdname = "rm";
  44.  
  45. unsigned int rm_recursive(const char *path)
  46. {
  47.     cli_error(CL_ENOTSUP, "I do not yet remove directories");
  48.     return 1;
  49. }
  50.  
  51. unsigned int rm_single(const char *path)
  52. {
  53.     if (unlink(path)) {
  54.         cli_error(CL_EFAIL, "rm: could not remove file %s", path);
  55.         return 1;
  56.     }
  57.     return 0;
  58. }
  59.  
  60. unsigned int rm_scope(const char *path)
  61. {
  62.     int fd;
  63.     DIR *dirp;
  64.  
  65.     dirp = opendir(path);
  66.     if (dirp) {
  67.         closedir(dirp);
  68.         return RM_DIR;
  69.     }
  70.  
  71.     fd = open(path, O_RDONLY);
  72.     if (fd > 0) {
  73.         close(fd);
  74.         return RM_FILE;
  75.     }
  76.  
  77.     return RM_BOGUS;
  78. }
  79.  
  80. /* Dispays help for rm in various levels */
  81. void * help_cmd_rm(unsigned int level)
  82. {
  83.     if (level == HELP_SHORT) {
  84.         printf("`%s' removes files and directories.\n", cmdname);
  85.     } else {
  86.         help_cmd_rm(HELP_SHORT);
  87.         printf("  %s <path> If <path> is a directory, all files and "
  88.             "directories\n  within will be unconditionally removed.\n",
  89.                 cmdname);
  90.     }
  91.     return CMD_VOID;
  92. }
  93.  
  94. /* Main entry point for rm, accepts an array of arguments */
  95. int * cmd_rm(char **argv)
  96. {
  97.     unsigned int argc;
  98.     unsigned int i, scope, ret = 0;
  99.     char *buff;
  100.  
  101.     /* Count the arguments */
  102.     for (argc = 0; argv[argc] != NULL; argc ++);
  103.  
  104.     if (argc < 2) {
  105.         cli_error(CL_EFAIL,
  106.             "%s - insufficient arguments. Try `help %s extended'",
  107.                 cmdname, cmdname);
  108.         return CMD_FAILURE;
  109.     }
  110.  
  111.     for (i = 1; i < argc; i++) {
  112.         buff = cli_strdup(argv[i]);
  113.         scope = rm_scope(buff);
  114.         switch (scope) {
  115.         case RM_BOGUS:
  116.             cli_error(CL_ENOENT, "Can not unlink %s", buff);
  117.             break;
  118.         case RM_FILE:
  119.             ret += rm_single(buff);
  120.             break;
  121.         case RM_DIR:
  122.             ret += rm_recursive(buff);
  123.             break;
  124.         }
  125.         free(buff);
  126.     }
  127.  
  128.     if (ret)
  129.         return CMD_FAILURE;
  130.     else
  131.         return CMD_SUCCESS;
  132. }
  133.  
  134.