source: trunk/athena/bin/delete/lsdel.c @ 2084

/*
 * $Source: /afs/dev.mit.edu/source/repository/athena/bin/delete/lsdel.c,v $
 * $Author: jik $
 *
 * This program is a replacement for rm.  Instead of actually deleting
 * files, it marks them for deletion by prefixing them with a ".#"
 * prefix.
 *
 * Copyright (c) 1989 by the Massachusetts Institute of Technology.
 * For copying and distribution information, see the file "mit-copyright.h."
 */

#if (!defined(lint) && !defined(SABER))
     static char rcsid_lsdel_c[] = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/lsdel.c,v 1.6 1989-09-11 04:34:06 jik Exp $";
#endif

#include <stdio.h>
#include <sys/types.h>
#include <sys/dir.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <strings.h>
#include "col.h"
#include "util.h"
#include "directories.h"
#include "pattern.h"
#include "lsdel.h"
#include "mit-copyright.h"

char *malloc(), *realloc();
extern int current_time;

int block_total = 0;
int dirsonly, recursive, timev, yield;
char *whoami, *error_buf;

main(argc, argv)
int argc;
char *argv[];
{
     extern char *optarg;
     extern int optind;
     int arg;
     
     whoami = lastpart(argv[0]);
     error_buf = malloc(strlen(whoami) + MAXPATHLEN + 3);
     if (! error_buf) {
          perror(whoami);
          exit(1);
     }
     dirsonly = recursive = timev = yield = 0;
     while ((arg = getopt(argc, argv, "drt:y")) != -1) {
          switch (arg) {
          case 'd':
               dirsonly++;
               break;
          case 'r':
               recursive++;
               break;
          case 't':
               timev = atoi(optarg);
               break;
          case 'y':
               yield++;
               break;
          default:
               usage();
               exit(1);
          }
     }
     if (optind == argc) {
          char *cwd;

          cwd = ".";
          exit(ls(&cwd, 1));
     }
     exit(ls(&argv[optind], argc - optind));
}






usage()
{
     printf("Usage: %s [ options ] [ filename [ ...]]\n", whoami);
     printf("Options are:\n");
     printf("     -d     list directory names, not contents\n");
     printf("     -r     recursive\n");
     printf("     -t n   list n-day-or-older files only\n");
     printf("     -y     report total space taken up by files\n");
}




ls(args, num)
char **args;
int num;
{
     char *start_dir;
     char **found_files;
     int num_found, total = 0;
     char *file_re;
     int status = 0;

     if (initialize_tree())
          exit(1);
     
     for ( ; num; num--) {
          if (*args[num - 1] == '/') {
               start_dir = "/";
               file_re = parse_pattern(args[num - 1] + 1);
          }
          else {
               start_dir = "";
               file_re = parse_pattern(args[num - 1]);
          }
          if (! file_re)
               return(ERROR_MASK);

          found_files = get_the_files(start_dir, file_re, &num_found);
          total += num_found;
          if (num_found)
               num_found = process_files(found_files, num_found);
          else {
               /* What we do at this point depends on exactly what the
                * file_re is.  There are several possible conditions:
                * 1. file_re has no wildcards in it, which means that
                *    if we couldn't find it, that means it doesn't
                *    exist.  Print a not found error.
                * 2. file_re is an existing directory, with no deleted
                *    files in it.  Print nothing.
                * 3. file_re doesn't exist, and there are wildcards in
                *    it.  Print "no match".
                * None of these are considered error conditions, so we
                * don't set the error flag.
                */
               if (no_wildcards(file_re)) {
                    if (! directory_exists(args[num - 1])) {
                         fprintf(stderr, "%s: %s: not found\n",
                                 whoami, args[num - 1]);
                    }
               }
               else {
                    fprintf(stderr, "%s: %s: no match\n",
                            whoami, args[num-1]);
               }
          }
          free(file_re);
     }
     if (total) {
          list_files();
     }
     if (yield)
          printf("\nTotal space taken up by file%s: %dk\n",
                 (total == 1 ? "" : "s"), blk_to_k(block_total));
     return(status);
}




char **get_the_files(start_dir, file_re, number_found)
char *start_dir, *file_re;
int *number_found;
{
     char **matches;
     int num_matches;
     char **found;
     int num;
     int i;

     found = (char **) malloc(0);
     num = 0;

     matches = find_matches(start_dir, file_re, &num_matches);
     if (recursive) {
          char **recurs_found;
          int recurs_num;

          for (i = 0; i < num_matches; free(matches[i]), i++) {
               if (is_deleted(lastpart(matches[i]))) {
                    found = add_str(found, num, matches[i]);
                    num++;
               }
               recurs_found = find_deleted_recurses(matches[i], &recurs_num);
               add_arrays(&found, &num, &recurs_found, &recurs_num);
          }
     }
     else {
          struct stat stat_buf;
          char **contents_found;
          int num_contents;
          
          for (i = 0; i < num_matches; free(matches[i]), i++) {
               if (is_deleted(lastpart(matches[i]))) {
                    found = add_str(found, num, matches[i]);
                    num++;
               }
               if (dirsonly)
                    continue;
               if (lstat(matches[i], &stat_buf))
                    continue;
               if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) {
                    contents_found = find_deleted_contents_recurs(matches[i],
                                                          &num_contents);
                    add_arrays(&found, &num, &contents_found, &num_contents);
                    
               }
          }
     }
     free(matches);
     *number_found = num;
     return(found);
}






process_files(files, num)
char **files;
int num;
{
     int i;
     filerec *leaf;
     
     for (i = 0; i < num; i++) {
          if (! (leaf = add_path_to_tree(files[i]))) {
               fprintf(stderr, "%s: error adding path to filename tree\n",
                       whoami);
               exit(1);
          }

          free(files[i]);
          if (! timed_out(leaf, current_time, timev)) {
               free_leaf(leaf);
               num--;
               continue;
          }
          block_total += leaf->specs.st_blocks;
     }
     free(files);
     return(num);
}





list_files()
{
     filerec *current;
     char **strings;
     int num;

     strings = (char **) malloc(sizeof(char *));
     num = 0;
     if (! strings) {
          perror(sprintf(error_buf, "%s: list_files", whoami));
          exit(1);
     }
     current = get_root_tree();
     strings = accumulate_names(current, strings, &num);
     current = get_cwd_tree();
     strings = accumulate_names(current, strings, &num);
     column_array(strings, num, DEF_SCR_WIDTH, 0, 0, 2, 1, 0, 1, stdout);
     for ( ; num; num--)
          free(strings[num - 1]);
     free(strings);
     return(0);
}