source: trunk/athena/bin/delete/lsdel.c @ 12144

/*
 * $Source: /afs/dev.mit.edu/source/repository/athena/bin/delete/lsdel.c,v $
 * $Author: ghudson $
 *
 * 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-copying.h."
 */

#if (!defined(lint) && !defined(SABER))
     static char rcsid_lsdel_c[] = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/lsdel.c,v 1.23 1998-11-16 16:42:26 ghudson Exp $";
#endif

#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/param.h>
#include <string.h>
#include <errno.h>
#include <com_err.h>
#include "col.h"
#include "util.h"
#include "directories.h"
#include "pattern.h"
#include "lsdel.h"
#include "shell_regexp.h"
#include "mit-copying.h"
#include "delete_errs.h"
#include "errors.h"

extern time_t current_time;

int space_total = 0;
int dirsonly, recursive, yield, f_links, f_mounts, singlecolumn;
time_t timev;

main(argc, argv)
int argc;
char *argv[];
{
     extern char *optarg;
     extern int optind;
     int arg;
     
     whoami = lastpart(argv[0]);

     dirsonly = recursive = timev = yield = f_links = f_mounts = 0;
     singlecolumn = -1;
     while ((arg = getopt(argc, argv, "1Cdrt:ysm")) != -1) {
          switch (arg) {
          case '1':
               if ((singlecolumn != -1) && (! singlecolumn)) {
                    fprintf(stderr,
                            "%s: -1 and -C options are mutually exclusive\n",
                            whoami);
                    usage();
                    exit(1);
               }
               singlecolumn = 1;
               break;
          case 'C':
               if ((singlecolumn != -1) && singlecolumn) {
                    fprintf(stderr,
                            "%s: -1 and -C options are mutually exclusive\n",
                            whoami);
                    usage();
                    exit(1);
               }
               singlecolumn = 0;
               break;
          case 'd':
               dirsonly++;
               break;
          case 'r':
               recursive++;
               break;
          case 't':
               timev = atoi(optarg);
               break;
          case 'y':
               yield++;
               break;
          case 's':
               f_links++;
               break;
          case 'm':
               f_mounts++;
               break;
          default:
               usage();
               exit(1);
          }
     }
     if (singlecolumn == -1)
          singlecolumn = ! isatty(1);

     if (optind == argc) {
          char *cwd;

          cwd = ".";

          if (ls(&cwd, 1))
               error("ls of .");
     }
     else if (ls(&argv[optind], argc - optind))
          error ("ls");

     exit (error_occurred ? 1 : 0);
}






usage()
{
     fprintf(stderr, "Usage: %s [ options ] [ filename [ ...]]\n", whoami);
     fprintf(stderr, "Options are:\n");
     fprintf(stderr, "     -d     list directory names, not contents\n");
     fprintf(stderr, "     -r     recursive\n");
     fprintf(stderr, "     -t n   list n-day-or-older files only\n");
     fprintf(stderr, "     -y     report total space taken up by files\n");
     fprintf(stderr, "     -s     follow symbolic links to directories\n");
     fprintf(stderr, "     -m     follow mount points\n");
     fprintf(stderr, "     -1     force single-column output\n");
     fprintf(stderr, "     -C     force multi-column output (default when output is to a terminal)\n");
     fprintf(stderr, "-1 and -C are mutually exclusive\n");
}




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

     initialize_del_error_table();
     
     if (retval = initialize_tree()) {
          error("initialize_tree");
          return retval;
     }
     
     for ( ; num; num--) {
          if (retval = get_the_files(args[num - 1], &num_found,
                                     &found_files)) {
               error(args[num - 1]);
               status = retval;
               continue;
          }

          if (num_found) {
               num_found = process_files(found_files, num_found);
               if (num_found < 0) {
                    error("process_files");
                    status = error_code;
                    continue;
               }
               total += num_found;
          }
          else {
               /* What we do at this point depends on exactly what the
                * filename is.  There are several possible conditions:
                * 1. The filename 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. Filename is an existing directory, with no deleted
                *    files in it.  Print nothing.
                * 3. Filename 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(args[num - 1])) {
                    if (! directory_exists(args[num - 1])) {
                         set_error(ENOENT);
                         error(args[num - 1]);
                         status = error_code;
                         continue;
                    }
               }
               else {
                    set_error(ENOMATCH);
                    error(args[num - 1]);
                    status = error_code;
                    continue;
               }
          }
     }
     if (total) {
          if (list_files()) {
               error("list_files");
               return error_code;
          }
     }
     if (yield)
          printf("\nTotal space taken up by file%s: %dk\n",
                 (total == 1 ? "" : "s"), space_to_k(space_total));

     return status;
}




int get_the_files(name, number_found, found)
char *name;
int *number_found;
char ***found;
{
     int retval;
     int options;
     
     options = FIND_DELETED | FIND_CONTENTS;
     if (recursive)
          options |= RECURS_FIND_DELETED;
     if (! dirsonly)
          options |= RECURS_DELETED;
     if (f_mounts)
          options |= FOLLW_MOUNTPOINTS;
     if (f_links)
          options |= FOLLW_LINKS;
     
     retval = find_matches(name, number_found, found, options);
     if (retval) {
          error("find_matches");
          return retval;
     }

     return 0;
}






process_files(files, num)
char **files;
int num;
{
     int i, skipped = 0;
     filerec *leaf;
     
     for (i = 0; i < num; i++) {
          if (add_path_to_tree(files[i], &leaf)) {
               error("add_path_to_tree");
               return -1;
          }
          free(files[i]);
          if (! timed_out(leaf, current_time, timev)) {
               free_leaf(leaf);
               skipped++;
               continue;
          }
          space_total += specs_to_space(leaf->specs);
     }
     free((char *) files);
     return(num-skipped);
}




static int alphacmp(arg1, arg2)
const void *arg1, *arg2;
{
     return(strcmp(*(char **) arg1, *(char **) arg2));
}

list_files()
{
     filerec *current;
     char **strings;
     int num;
     int retval;
     
     strings = (char **) Malloc((unsigned) sizeof(char *));
     num = 0;
     if (! strings) {
          set_error(errno);
          error("Malloc");
          return error_code;
     }
     current = get_root_tree();
     if (retval = accumulate_names(current, &strings, &num)) {
          error("accumulate_names");
          return retval;
     }
     current = get_cwd_tree();
     if (retval = accumulate_names(current, &strings, &num)) {
          error("accumulate_names");
          return retval;
     }

     qsort(strings, num, sizeof(char *), alphacmp);

     if (retval = unique(&strings, &num)) {
          error("unique");
          return retval;
     }

     if (retval = column_array(strings, num, DEF_SCR_WIDTH, 0, singlecolumn,
                               2, 1, 0, 1, stdout)) {
          error("column_array");
          return retval;
     }
     
     for ( ; num; num--)
          free(strings[num - 1]);
     free((char *) strings);
     return 0;
}


int unique(the_files, number)
char ***the_files;
int *number;
{
     int i, last;
     int offset;
     char **files;

     files = *the_files;
     for (last = 0, i = 1; i < *number; i++) {
          if (! strcmp(files[last], files[i])) {
               free (files[i]);
               free (files[i]);
               files[i] = (char *) NULL;
          }
          else
               last = i;
     }
     
     for (offset = 0, i = 0; i + offset < *number; i++) {
          if (! files[i])
               offset++;
          if (i + offset < *number)
               files[i] = files[i + offset];
     }
     *number -= offset;
     files = (char **) realloc((char *) files,
                               (unsigned) (sizeof(char *) * *number));
     if ((! files) && *number)
     {
          set_error(errno);
          error("realloc");
          return errno;
     }

     *the_files = files;
     return 0;
}