[1704] | 1 | /* |
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| 2 | * $Source: /afs/dev.mit.edu/source/repository/athena/bin/delete/expunge.c,v $ |
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| 3 | * $Author: jik $ |
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| 4 | * |
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| 5 | * This program is part of a package including delete, undelete, |
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| 6 | * lsdel, expunge and purge. The software suite is meant as a |
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| 7 | * replacement for rm which allows for file recovery. |
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| 8 | * |
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| 9 | * Copyright (c) 1989 by the Massachusetts Institute of Technology. |
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| 10 | * For copying and distribution information, see the file "mit-copyright.h." |
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| 11 | */ |
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| 12 | |
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| 13 | #if (!defined(lint) && !defined(SABER)) |
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[1850] | 14 | static char rcsid_expunge_c[] = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/delete/expunge.c,v 1.9 1989-05-04 14:10:54 jik Exp $"; |
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[1704] | 15 | #endif |
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| 16 | |
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| 17 | /* |
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| 18 | * Things that need to be fixed later: |
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| 19 | * |
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| 20 | * 1. The program should somehow store the sizes of deleted files and |
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| 21 | * report the total amount of space regained after an expunge or purge. |
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| 22 | */ |
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| 23 | |
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| 24 | #include <stdio.h> |
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| 25 | #include <sys/types.h> |
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| 26 | #include <sys/time.h> |
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| 27 | #include <sys/dir.h> |
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| 28 | #include <sys/param.h> |
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| 29 | #include <strings.h> |
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| 30 | #include <sys/stat.h> |
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[1732] | 31 | #include "col.h" |
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[1704] | 32 | #include "directories.h" |
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| 33 | #include "util.h" |
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| 34 | #include "pattern.h" |
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| 35 | #include "expunge.h" |
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[1811] | 36 | #include "mit-copyright.h" |
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[1704] | 37 | |
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| 38 | extern char *malloc(), *realloc(); |
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[1732] | 39 | extern int current_time; |
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[1704] | 40 | |
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| 41 | char *whoami, *error_buf; |
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| 42 | |
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[1732] | 43 | int timev, /* minimum mod time before undeletion */ |
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[1704] | 44 | interactive, /* query before each expunge */ |
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| 45 | recursive, /* expunge undeleted directories recursively */ |
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| 46 | noop, /* print what would be done instead of doing it */ |
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| 47 | verbose, /* print a line as each file is deleted */ |
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| 48 | force, /* do not ask for any confirmation */ |
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[1732] | 49 | listfiles, /* list files at toplevel */ |
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| 50 | yield; /* print yield of expunge at end */ |
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[1704] | 51 | |
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[1732] | 52 | int blocks_removed = 0; |
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[1704] | 53 | |
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| 54 | |
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| 55 | |
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| 56 | |
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| 57 | main(argc, argv) |
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| 58 | int argc; |
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| 59 | char *argv[]; |
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| 60 | { |
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| 61 | extern char *optarg; |
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| 62 | extern int optind; |
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| 63 | int arg; |
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| 64 | int status = 0; |
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| 65 | |
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| 66 | whoami = lastpart(argv[0]); |
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| 67 | error_buf = malloc(strlen(whoami) + MAXPATHLEN + 3); |
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| 68 | if (! error_buf) { |
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| 69 | perror(whoami); |
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| 70 | exit(1); |
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| 71 | } |
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| 72 | if (*whoami == 'p') { /* we're doing a purge */ |
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| 73 | exit (purge()); |
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| 74 | } |
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[1732] | 75 | timev = 0; |
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| 76 | yield = interactive = recursive = noop = verbose = listfiles = force = 0; |
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| 77 | while ((arg = getopt(argc, argv, "t:irfnvly")) != -1) { |
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[1704] | 78 | switch (arg) { |
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| 79 | case 't': |
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[1732] | 80 | timev = atoi(optarg); |
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[1704] | 81 | break; |
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| 82 | case 'i': |
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| 83 | interactive++; |
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| 84 | break; |
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| 85 | case 'r': |
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| 86 | recursive++; |
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| 87 | break; |
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| 88 | case 'f': |
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| 89 | force++; |
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| 90 | break; |
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| 91 | case 'n': |
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| 92 | noop++; |
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| 93 | break; |
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| 94 | case 'v': |
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| 95 | verbose++; |
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| 96 | break; |
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| 97 | case 'l': |
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| 98 | listfiles++; |
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| 99 | break; |
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[1732] | 100 | case 'y': |
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| 101 | yield++; |
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| 102 | break; |
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[1704] | 103 | default: |
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| 104 | usage(); |
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| 105 | exit(1); |
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| 106 | } |
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| 107 | } |
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| 108 | if (optind == argc) { |
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| 109 | char *dir; |
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[1732] | 110 | dir = "."; |
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[1704] | 111 | status = status | expunge(&dir, 1); /* current working directory */ |
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| 112 | } |
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| 113 | else |
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| 114 | status = status | expunge(&argv[optind], argc - optind); |
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| 115 | exit(status & ERROR_MASK); |
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| 116 | } |
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| 117 | |
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| 118 | |
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| 119 | |
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| 120 | |
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| 121 | |
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| 122 | purge() |
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| 123 | { |
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| 124 | char *home[1]; |
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| 125 | |
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| 126 | home[0] = malloc(MAXPATHLEN); |
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| 127 | if (! home[0]) { |
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| 128 | perror(sprintf(error_buf, "%s: purge", whoami)); |
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| 129 | exit(1); |
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| 130 | } |
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[1732] | 131 | timev = interactive = noop = verbose = force = 0; |
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| 132 | yield = listfiles = recursive = 1; |
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[1704] | 133 | get_home(home[0]); |
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| 134 | if (! *home[0]) { |
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| 135 | fprintf(stderr, "%s: purge: can't get home directory\n", whoami); |
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| 136 | exit(1); |
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| 137 | } |
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| 138 | |
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| 139 | printf("Please be patient.... this may take a while.\n\n"); |
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| 140 | |
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| 141 | return(expunge(home, 1)); |
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| 142 | } |
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| 143 | |
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| 144 | |
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| 145 | |
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| 146 | |
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| 147 | usage() |
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| 148 | { |
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| 149 | printf("Usage: %s [ options ] [ filename [ ... ]]\n", whoami); |
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| 150 | printf("Options are:\n"); |
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| 151 | printf(" -r recursive\n"); |
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| 152 | printf(" -i interactive\n"); |
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| 153 | printf(" -f force\n"); |
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| 154 | printf(" -t n n-day-or-older expunge\n"); |
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| 155 | printf(" -n noop\n"); |
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| 156 | printf(" -v verbose\n"); |
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| 157 | printf(" -l list files before expunging\n"); |
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[1732] | 158 | printf(" -y print yield of expunge\n"); |
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[1707] | 159 | printf(" -- end options and start filenames\n"); |
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[1704] | 160 | } |
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| 161 | |
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| 162 | |
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| 163 | |
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| 164 | |
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| 165 | |
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| 166 | expunge(files, num) |
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| 167 | char **files; |
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| 168 | int num; |
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| 169 | { |
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| 170 | char *file_re; |
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| 171 | char **found_files; |
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| 172 | int num_found; |
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| 173 | char *start_dir; |
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| 174 | int status = 0; |
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| 175 | int total = 0; |
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| 176 | filerec *current; |
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| 177 | |
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| 178 | if (initialize_tree()) |
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| 179 | exit(1); |
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| 180 | |
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| 181 | for ( ; num ; num--) { |
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| 182 | if (*files[num - 1] == '/') { |
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| 183 | start_dir = "/"; |
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| 184 | file_re = parse_pattern(files[num - 1] + 1); |
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| 185 | } |
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| 186 | else { |
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| 187 | start_dir = ""; |
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[1850] | 188 | if ((*files[num - 1] == '.') && (! *(files[num - 1] + 1))) |
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| 189 | file_re = parse_pattern("*"); |
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| 190 | else |
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| 191 | file_re = parse_pattern(files[num - 1]); |
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[1704] | 192 | } |
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| 193 | if (! file_re) |
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| 194 | return(ERROR_MASK); |
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| 195 | |
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| 196 | found_files = get_the_files(start_dir, file_re, &num_found); |
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| 197 | if (num_found) |
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[1732] | 198 | num_found = process_files(found_files, num_found); |
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| 199 | total += num_found; |
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| 200 | if (! num_found) if (! force) { |
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[1753] | 201 | /* |
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| 202 | * There are three different situations here. Eiter we |
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| 203 | * are dealing with an existing directory with no |
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| 204 | * deleted files in it, or we are deleting with a |
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| 205 | * non-existing deleted file with wildcards, or we are |
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| 206 | * dealing with a non-existing deleted file without |
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| 207 | * wildcards. In the former case we print nothing, and |
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| 208 | * in the latter cases we print either "no match" or |
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| 209 | * "not found" respectively |
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| 210 | */ |
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| 211 | if (no_wildcards(file_re)) { |
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| 212 | if (! directory_exists(files[num - 1])) { |
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| 213 | fprintf(stderr, "%s: %s: not found\n", |
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| 214 | whoami, files[num - 1]); |
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| 215 | } |
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| 216 | } |
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| 217 | else { |
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| 218 | fprintf(stderr, "%s: %s: no match\n", whoami, |
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| 219 | files[num - 1]); |
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| 220 | } |
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[1704] | 221 | } |
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[1753] | 222 | free(file_re); |
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[1704] | 223 | } |
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| 224 | if (total && listfiles) { |
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| 225 | list_files(); |
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| 226 | if (! force) if (! top_level()) |
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| 227 | return(NO_DELETE_MASK); |
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| 228 | } |
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[1732] | 229 | current = get_root_tree(); |
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[1704] | 230 | if (current) |
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[1732] | 231 | status = status | expunge_specified(current); |
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| 232 | current = get_cwd_tree(); |
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[1704] | 233 | if (current) |
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[1732] | 234 | status = status | expunge_specified(current); |
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[1704] | 235 | |
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[1732] | 236 | if (yield) { |
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| 237 | if (noop) |
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| 238 | printf("Total that would be expunged: %dk\n", |
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| 239 | blk_to_k(blocks_removed)); |
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| 240 | else |
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| 241 | printf("Total expunged: %dk\n", blk_to_k(blocks_removed)); |
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| 242 | } |
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[1704] | 243 | return(status); |
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| 244 | } |
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| 245 | |
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| 246 | |
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| 247 | |
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[1732] | 248 | expunge_specified(leaf) |
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| 249 | filerec *leaf; |
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| 250 | { |
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| 251 | int status = 0; |
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[1704] | 252 | |
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[1850] | 253 | if ((leaf->specified) && ((leaf->specs.st_mode & S_IFMT) == S_IFDIR)) { |
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[1732] | 254 | status = do_directory_expunge(leaf); |
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[1850] | 255 | /* the "do_directory_expunge" really only asks the user if he */ |
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| 256 | /* wants to expunge the directory, it doesn't do any deleting. */ |
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| 257 | } |
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| 258 | /* "But wait," you're saying to yourself as you ponder this code, */ |
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| 259 | /* "Why isn't this next if statement included inside the if */ |
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| 260 | /* statement above, since they both refer to directories." Well, */ |
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| 261 | /* I wondered about the same thing a week after I wrote the code. */ |
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| 262 | /* Keep in mind that a directory passed to this function may not */ |
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| 263 | /* be specified, but some of its children may be. Therefore, we */ |
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| 264 | /* have to recursively descend even unspecified directories to */ |
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| 265 | /* find specified files, hence this is outside of the if */ |
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| 266 | /* statement above. */ |
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[1732] | 267 | if (! status) { |
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| 268 | if (leaf->dirs) |
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| 269 | status |= expunge_specified(leaf->dirs); |
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| 270 | if (leaf->files) |
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| 271 | status |= expunge_specified(leaf->files); |
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| 272 | } |
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[1850] | 273 | if ((leaf->specified) && (! status)) |
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[1732] | 274 | status |= really_do_expunge(leaf); |
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| 275 | if (leaf->next) |
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| 276 | status |= expunge_specified(leaf->next); |
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| 277 | free_leaf(leaf); |
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| 278 | return(status); |
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| 279 | } |
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[1704] | 280 | |
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[1732] | 281 | |
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[1704] | 282 | process_files(files, num) |
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| 283 | char **files; |
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| 284 | int num; |
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| 285 | { |
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[1831] | 286 | int i, skipped = 0; |
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[1732] | 287 | filerec *leaf; |
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| 288 | |
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[1704] | 289 | for (i = 0; i < num; i++) { |
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[1732] | 290 | if (! (leaf = add_path_to_tree(files[i]))) { |
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[1704] | 291 | fprintf(stderr, "%s: error adding path to filename tree\n", |
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| 292 | whoami); |
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| 293 | exit(1); |
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| 294 | } |
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| 295 | |
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[1732] | 296 | free(files[i]); |
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| 297 | if (! timed_out(leaf, current_time, timev)) { |
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| 298 | free_leaf(leaf); |
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[1831] | 299 | skipped++; |
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[1704] | 300 | } |
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| 301 | } |
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[1732] | 302 | free(files); |
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[1831] | 303 | return(num-skipped); |
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[1704] | 304 | } |
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| 305 | |
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| 306 | |
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| 307 | |
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| 308 | |
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| 309 | |
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| 310 | |
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| 311 | |
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| 312 | |
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| 313 | |
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| 314 | do_directory_expunge(file_ent) |
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| 315 | filerec *file_ent; |
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| 316 | { |
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| 317 | char buf[MAXPATHLEN]; |
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| 318 | |
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| 319 | get_leaf_path(file_ent, buf); |
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| 320 | convert_to_user_name(buf, buf); |
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| 321 | |
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| 322 | if (interactive) { |
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| 323 | printf("%s: Expunge directory %s? ", whoami, buf); |
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| 324 | if (! yes()) |
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| 325 | return(NO_DELETE_MASK); |
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| 326 | } |
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[1732] | 327 | return(0); |
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[1704] | 328 | } |
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| 329 | |
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| 330 | |
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| 331 | |
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| 332 | |
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| 333 | |
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| 334 | |
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| 335 | |
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| 336 | |
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| 337 | really_do_expunge(file_ent) |
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| 338 | filerec *file_ent; |
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| 339 | { |
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| 340 | char real[MAXPATHLEN], user[MAXPATHLEN]; |
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| 341 | int status; |
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| 342 | |
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| 343 | get_leaf_path(file_ent, real); |
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| 344 | convert_to_user_name(real, user); |
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| 345 | |
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| 346 | if (interactive) { |
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[1732] | 347 | printf ("%s: Expunge %s (%dk)? ", whoami, user, |
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| 348 | blk_to_k(file_ent->specs.st_blocks)); |
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[1704] | 349 | if (! yes()) |
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| 350 | return(NO_DELETE_MASK); |
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| 351 | } |
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| 352 | |
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| 353 | if (noop) { |
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[1732] | 354 | blocks_removed += file_ent->specs.st_blocks; |
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| 355 | printf("%s: %s (%dk) would be expunged (%dk total)\n", whoami, user, |
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| 356 | blk_to_k(file_ent->specs.st_blocks), |
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| 357 | blk_to_k(blocks_removed)); |
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[1704] | 358 | return(0); |
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| 359 | } |
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| 360 | |
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[1732] | 361 | if ((file_ent->specs.st_mode & S_IFMT) == S_IFDIR) |
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[1704] | 362 | status = rmdir(real); |
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| 363 | else |
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| 364 | status = unlink(real); |
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| 365 | if (! status) { |
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[1732] | 366 | blocks_removed += file_ent->specs.st_blocks; |
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[1704] | 367 | if (verbose) |
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[1732] | 368 | printf("%s: %s (%dk) expunged (%dk total)\n", whoami, user, |
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| 369 | blk_to_k(file_ent->specs.st_blocks), |
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| 370 | blk_to_k(blocks_removed)); |
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[1704] | 371 | return(0); |
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| 372 | } |
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| 373 | else { |
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| 374 | if (! force) |
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| 375 | fprintf(stderr, "%s: %s not expunged\n", whoami, user); |
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| 376 | return(ERROR_MASK); |
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| 377 | } |
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| 378 | } |
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| 379 | |
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| 380 | |
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| 381 | |
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| 382 | |
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| 383 | |
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| 384 | |
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| 385 | |
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| 386 | |
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| 387 | |
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| 388 | top_level() |
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| 389 | { |
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| 390 | if (interactive) { |
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| 391 | printf("The above files, which have been marked for deletion, are about to be\n"); |
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| 392 | printf("expunged forever! You will be asked for confirmation before each file is\n"); |
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[1757] | 393 | printf("deleted. Do you wish to continue [return = no]? "); |
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[1704] | 394 | } |
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| 395 | else { |
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| 396 | printf("The above files, which have been marked for deletion, are about to be\n"); |
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| 397 | printf("expunged forever! Make sure you don't need any of them before continuing.\n"); |
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[1757] | 398 | printf("Do you wish to continue [return = no]? "); |
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[1704] | 399 | } |
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| 400 | return (yes()); |
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| 401 | } |
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| 402 | |
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[1732] | 403 | |
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| 404 | |
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| 405 | |
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| 406 | |
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[1704] | 407 | list_files() |
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| 408 | { |
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| 409 | filerec *current; |
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[1732] | 410 | char **strings; |
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| 411 | int num; |
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[1704] | 412 | |
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[1732] | 413 | strings = (char **) malloc(sizeof(char *)); |
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| 414 | num = 0; |
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| 415 | if (! strings) { |
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| 416 | if (! force) |
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| 417 | perror(sprintf(error_buf, "%s: list_files", whoami)); |
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| 418 | exit(1); |
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| 419 | } |
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[1704] | 420 | printf("The following deleted files are going to be expunged: \n\n"); |
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| 421 | |
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| 422 | current = get_root_tree(); |
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[1732] | 423 | strings = accumulate_names(current, strings, &num); |
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[1704] | 424 | current = get_cwd_tree(); |
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[1732] | 425 | strings = accumulate_names(current, strings, &num); |
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| 426 | column_array(strings, num, DEF_SCR_WIDTH, 0, 0, 2, 1, 0, 1, stdout); |
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[1704] | 427 | printf("\n"); |
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| 428 | return(0); |
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| 429 | } |
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| 430 | |
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| 431 | |
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| 432 | |
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| 433 | |
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| 434 | |
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| 435 | char **get_the_files(base, reg_exp, num_found) |
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| 436 | char *base, *reg_exp; |
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| 437 | int *num_found; |
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| 438 | { |
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| 439 | char **matches; |
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| 440 | int num_matches; |
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| 441 | char **found; |
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| 442 | int num; |
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| 443 | int i; |
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| 444 | |
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| 445 | found = (char **) malloc(0); |
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| 446 | num = 0; |
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| 447 | |
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| 448 | matches = find_matches(base, reg_exp, &num_matches); |
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| 449 | if (recursive) { |
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| 450 | char **recurs_found; |
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| 451 | int recurs_num; |
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| 452 | |
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| 453 | for (i = 0; i < num_matches; free(matches[i]), i++) { |
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| 454 | if (is_deleted(lastpart(matches[i]))) { |
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| 455 | found = add_str(found, num, matches[i]); |
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| 456 | num++; |
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| 457 | } |
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| 458 | recurs_found = find_deleted_recurses(matches[i], &recurs_num); |
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| 459 | add_arrays(&found, &num, &recurs_found, &recurs_num); |
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| 460 | } |
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| 461 | } |
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| 462 | else { |
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| 463 | struct stat stat_buf; |
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| 464 | char **contents_found; |
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| 465 | int num_contents; |
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| 466 | |
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| 467 | for (i = 0; i < num_matches; free(matches[i]), i++) { |
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| 468 | if (is_deleted(lastpart(matches[i]))) { |
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| 469 | found = add_str(found, num, matches[i]); |
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| 470 | num++; |
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| 471 | } |
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| 472 | if (lstat(matches[i], &stat_buf)) |
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| 473 | continue; |
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[1712] | 474 | if ((stat_buf.st_mode & S_IFMT) == S_IFDIR) { |
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[1704] | 475 | contents_found = find_deleted_contents_recurs(matches[i], |
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| 476 | &num_contents); |
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| 477 | add_arrays(&found, &num, &contents_found, |
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| 478 | &num_contents); |
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| 479 | } |
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| 480 | } |
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| 481 | } |
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| 482 | free(matches); |
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| 483 | *num_found = num; |
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| 484 | return(found); |
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| 485 | } |
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