1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28*0Sstevel@tonic-gate * Use is subject to license terms. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate /* 34*0Sstevel@tonic-gate * rm [-fiRr] file ... 35*0Sstevel@tonic-gate */ 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <stdio.h> 38*0Sstevel@tonic-gate #include <fcntl.h> 39*0Sstevel@tonic-gate #include <string.h> 40*0Sstevel@tonic-gate #include <sys/types.h> 41*0Sstevel@tonic-gate #include <sys/stat.h> 42*0Sstevel@tonic-gate #include <dirent.h> 43*0Sstevel@tonic-gate #include <limits.h> 44*0Sstevel@tonic-gate #include <locale.h> 45*0Sstevel@tonic-gate #include <langinfo.h> 46*0Sstevel@tonic-gate #include <unistd.h> 47*0Sstevel@tonic-gate #include <stdlib.h> 48*0Sstevel@tonic-gate #include <errno.h> 49*0Sstevel@tonic-gate #include <sys/resource.h> 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate #define ARGCNT 5 /* Number of arguments */ 52*0Sstevel@tonic-gate #define CHILD 0 53*0Sstevel@tonic-gate #define DIRECTORY ((buffer.st_mode&S_IFMT) == S_IFDIR) 54*0Sstevel@tonic-gate #define SYMLINK ((buffer.st_mode&S_IFMT) == S_IFLNK) 55*0Sstevel@tonic-gate #define FAIL -1 56*0Sstevel@tonic-gate #define MAXFORK 100 /* Maximum number of forking attempts */ 57*0Sstevel@tonic-gate #define NAMESIZE MAXNAMLEN + 1 /* "/" + (file name size) */ 58*0Sstevel@tonic-gate #define TRUE 1 59*0Sstevel@tonic-gate #define FALSE 0 60*0Sstevel@tonic-gate #define WRITE 02 61*0Sstevel@tonic-gate #define SEARCH 07 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate static int errcode; 64*0Sstevel@tonic-gate static int interactive, recursive, silent; /* flags for command line options */ 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate static void rm(char *, int); 67*0Sstevel@tonic-gate static void undir(char *, int, dev_t, ino_t); 68*0Sstevel@tonic-gate static int yes(void); 69*0Sstevel@tonic-gate static int mypath(dev_t, ino_t); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate static char yeschr[SCHAR_MAX + 2]; 72*0Sstevel@tonic-gate static char nochr[SCHAR_MAX + 2]; 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate static char *fullpath; 75*0Sstevel@tonic-gate static int homedirfd; 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate static void push_name(char *name, int first); 78*0Sstevel@tonic-gate static void pop_name(int first); 79*0Sstevel@tonic-gate static void force_chdir(char *); 80*0Sstevel@tonic-gate static void ch_dir(char *); 81*0Sstevel@tonic-gate static char *get_filename(char *name); 82*0Sstevel@tonic-gate static void chdir_home(void); 83*0Sstevel@tonic-gate static void check_homedir(void); 84*0Sstevel@tonic-gate static void cleanup(void); 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate static char *cwd; /* pathname of home dir, from getcwd() */ 87*0Sstevel@tonic-gate static rlim_t maxfiles; /* maximum number of open files */ 88*0Sstevel@tonic-gate static int first_dir = 1; /* flag set when first trying to remove a dir */ 89*0Sstevel@tonic-gate /* flag set when can't get dev/inode of a parent dir */ 90*0Sstevel@tonic-gate static int parent_err = 0; 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate struct dir_id { 93*0Sstevel@tonic-gate dev_t dev; 94*0Sstevel@tonic-gate ino_t inode; 95*0Sstevel@tonic-gate struct dir_id *next; 96*0Sstevel@tonic-gate }; 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate /* 99*0Sstevel@tonic-gate * homedir is the first of a linked list of structures 100*0Sstevel@tonic-gate * containing unique identifying device and inode numbers for 101*0Sstevel@tonic-gate * each directory, from the home dir up to the root. 102*0Sstevel@tonic-gate */ 103*0Sstevel@tonic-gate static struct dir_id homedir; 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate int 106*0Sstevel@tonic-gate main(int argc, char *argv[]) 107*0Sstevel@tonic-gate { 108*0Sstevel@tonic-gate extern int optind; 109*0Sstevel@tonic-gate int errflg = 0; 110*0Sstevel@tonic-gate int c; 111*0Sstevel@tonic-gate struct rlimit rl; 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate (void) setlocale(LC_ALL, ""); 114*0Sstevel@tonic-gate #if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */ 115*0Sstevel@tonic-gate #define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */ 116*0Sstevel@tonic-gate #endif 117*0Sstevel@tonic-gate (void) textdomain(TEXT_DOMAIN); 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate (void) strncpy(yeschr, nl_langinfo(YESSTR), SCHAR_MAX + 1); 120*0Sstevel@tonic-gate (void) strncpy(nochr, nl_langinfo(NOSTR), SCHAR_MAX + 1); 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate while ((c = getopt(argc, argv, "frRi")) != EOF) 123*0Sstevel@tonic-gate switch (c) { 124*0Sstevel@tonic-gate case 'f': 125*0Sstevel@tonic-gate silent = TRUE; 126*0Sstevel@tonic-gate #ifdef XPG4 127*0Sstevel@tonic-gate interactive = FALSE; 128*0Sstevel@tonic-gate #endif 129*0Sstevel@tonic-gate break; 130*0Sstevel@tonic-gate case 'i': 131*0Sstevel@tonic-gate interactive = TRUE; 132*0Sstevel@tonic-gate #ifdef XPG4 133*0Sstevel@tonic-gate silent = FALSE; 134*0Sstevel@tonic-gate #endif 135*0Sstevel@tonic-gate break; 136*0Sstevel@tonic-gate case 'r': 137*0Sstevel@tonic-gate case 'R': 138*0Sstevel@tonic-gate recursive = TRUE; 139*0Sstevel@tonic-gate break; 140*0Sstevel@tonic-gate case '?': 141*0Sstevel@tonic-gate errflg = 1; 142*0Sstevel@tonic-gate break; 143*0Sstevel@tonic-gate } 144*0Sstevel@tonic-gate 145*0Sstevel@tonic-gate /* 146*0Sstevel@tonic-gate * For BSD compatibility allow '-' to delimit the end 147*0Sstevel@tonic-gate * of options. However, if options were already explicitly 148*0Sstevel@tonic-gate * terminated with '--', then treat '-' literally: otherwise, 149*0Sstevel@tonic-gate * "rm -- -" won't remove '-'. 150*0Sstevel@tonic-gate */ 151*0Sstevel@tonic-gate if (optind < argc && 152*0Sstevel@tonic-gate strcmp(argv[optind], "-") == 0 && 153*0Sstevel@tonic-gate strcmp(argv[optind - 1], "--") != 0) 154*0Sstevel@tonic-gate optind++; 155*0Sstevel@tonic-gate 156*0Sstevel@tonic-gate argc -= optind; 157*0Sstevel@tonic-gate argv = &argv[optind]; 158*0Sstevel@tonic-gate 159*0Sstevel@tonic-gate if ((argc < 1 && !silent) || errflg) { 160*0Sstevel@tonic-gate (void) fprintf(stderr, 161*0Sstevel@tonic-gate gettext("usage: rm [-fiRr] file ...\n")); 162*0Sstevel@tonic-gate exit(2); 163*0Sstevel@tonic-gate } 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate if (getrlimit(RLIMIT_NOFILE, &rl)) { 166*0Sstevel@tonic-gate perror("getrlimit"); 167*0Sstevel@tonic-gate exit(2); 168*0Sstevel@tonic-gate } else 169*0Sstevel@tonic-gate maxfiles = rl.rlim_cur - 2; 170*0Sstevel@tonic-gate 171*0Sstevel@tonic-gate while (argc-- > 0) { 172*0Sstevel@tonic-gate rm(*argv, 1); 173*0Sstevel@tonic-gate argv++; 174*0Sstevel@tonic-gate } 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate cleanup(); 177*0Sstevel@tonic-gate return (errcode ? 2 : 0); 178*0Sstevel@tonic-gate /* NOTREACHED */ 179*0Sstevel@tonic-gate } 180*0Sstevel@tonic-gate 181*0Sstevel@tonic-gate static void 182*0Sstevel@tonic-gate rm(char *path, int first) 183*0Sstevel@tonic-gate { 184*0Sstevel@tonic-gate struct stat buffer; 185*0Sstevel@tonic-gate char *filepath; 186*0Sstevel@tonic-gate char *p; 187*0Sstevel@tonic-gate char resolved_path[PATH_MAX]; 188*0Sstevel@tonic-gate 189*0Sstevel@tonic-gate /* 190*0Sstevel@tonic-gate * Check file to see if it exists. 191*0Sstevel@tonic-gate */ 192*0Sstevel@tonic-gate if (lstat(path, &buffer) == FAIL) { 193*0Sstevel@tonic-gate if (!silent) { 194*0Sstevel@tonic-gate perror(path); 195*0Sstevel@tonic-gate ++errcode; 196*0Sstevel@tonic-gate } 197*0Sstevel@tonic-gate return; 198*0Sstevel@tonic-gate } 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate /* prevent removal of / but allow removal of sym-links */ 201*0Sstevel@tonic-gate if (!S_ISLNK(buffer.st_mode) && realpath(path, resolved_path) != NULL && 202*0Sstevel@tonic-gate strcmp(resolved_path, "/") == 0) { 203*0Sstevel@tonic-gate (void) fprintf(stderr, 204*0Sstevel@tonic-gate gettext("rm of %s is not allowed\n"), resolved_path); 205*0Sstevel@tonic-gate errcode++; 206*0Sstevel@tonic-gate return; 207*0Sstevel@tonic-gate } 208*0Sstevel@tonic-gate 209*0Sstevel@tonic-gate /* prevent removal of . or .. (directly) */ 210*0Sstevel@tonic-gate if (p = strrchr(path, '/')) 211*0Sstevel@tonic-gate p++; 212*0Sstevel@tonic-gate else 213*0Sstevel@tonic-gate p = path; 214*0Sstevel@tonic-gate if (strcmp(".", p) == 0 || strcmp("..", p) == 0) { 215*0Sstevel@tonic-gate if (!silent) { 216*0Sstevel@tonic-gate (void) fprintf(stderr, 217*0Sstevel@tonic-gate gettext("rm of %s is not allowed\n"), path); 218*0Sstevel@tonic-gate errcode++; 219*0Sstevel@tonic-gate } 220*0Sstevel@tonic-gate return; 221*0Sstevel@tonic-gate } 222*0Sstevel@tonic-gate /* 223*0Sstevel@tonic-gate * If it's a directory, remove its contents. 224*0Sstevel@tonic-gate */ 225*0Sstevel@tonic-gate if (DIRECTORY) { 226*0Sstevel@tonic-gate /* 227*0Sstevel@tonic-gate * If "-r" wasn't specified, trying to remove directories 228*0Sstevel@tonic-gate * is an error. 229*0Sstevel@tonic-gate */ 230*0Sstevel@tonic-gate if (!recursive) { 231*0Sstevel@tonic-gate (void) fprintf(stderr, 232*0Sstevel@tonic-gate gettext("rm: %s is a directory\n"), path); 233*0Sstevel@tonic-gate ++errcode; 234*0Sstevel@tonic-gate return; 235*0Sstevel@tonic-gate } 236*0Sstevel@tonic-gate 237*0Sstevel@tonic-gate if (first_dir) { 238*0Sstevel@tonic-gate check_homedir(); 239*0Sstevel@tonic-gate first_dir = 0; 240*0Sstevel@tonic-gate } 241*0Sstevel@tonic-gate 242*0Sstevel@tonic-gate undir(path, first, buffer.st_dev, buffer.st_ino); 243*0Sstevel@tonic-gate return; 244*0Sstevel@tonic-gate } 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate filepath = get_filename(path); 247*0Sstevel@tonic-gate 248*0Sstevel@tonic-gate /* 249*0Sstevel@tonic-gate * If interactive, ask for acknowledgement. 250*0Sstevel@tonic-gate * 251*0Sstevel@tonic-gate * TRANSLATION_NOTE - The following message will contain the 252*0Sstevel@tonic-gate * first character of the strings for "yes" and "no" defined 253*0Sstevel@tonic-gate * in the file "nl_langinfo.po". After substitution, the 254*0Sstevel@tonic-gate * message will appear as follows: 255*0Sstevel@tonic-gate * rm: remove <filename> (y/n)? 256*0Sstevel@tonic-gate * For example, in German, this will appear as 257*0Sstevel@tonic-gate * rm: l�schen <filename> (j/n)? 258*0Sstevel@tonic-gate * where j=ja, n=nein, <filename>=the file to be removed 259*0Sstevel@tonic-gate * 260*0Sstevel@tonic-gate */ 261*0Sstevel@tonic-gate 262*0Sstevel@tonic-gate 263*0Sstevel@tonic-gate if (interactive) { 264*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("rm: remove %s (%s/%s)? "), 265*0Sstevel@tonic-gate filepath, yeschr, nochr); 266*0Sstevel@tonic-gate if (!yes()) { 267*0Sstevel@tonic-gate free(filepath); 268*0Sstevel@tonic-gate return; 269*0Sstevel@tonic-gate } 270*0Sstevel@tonic-gate } else if (!silent) { 271*0Sstevel@tonic-gate /* 272*0Sstevel@tonic-gate * If not silent, and stdin is a terminal, and there's 273*0Sstevel@tonic-gate * no write access, and the file isn't a symbolic link, 274*0Sstevel@tonic-gate * ask for permission. 275*0Sstevel@tonic-gate * 276*0Sstevel@tonic-gate * TRANSLATION_NOTE - The following message will contain the 277*0Sstevel@tonic-gate * first character of the strings for "yes" and "no" defined 278*0Sstevel@tonic-gate * in the file "nl_langinfo.po". After substitution, the 279*0Sstevel@tonic-gate * message will appear as follows: 280*0Sstevel@tonic-gate * rm: <filename>: override protection XXX (y/n)? 281*0Sstevel@tonic-gate * where XXX is the permission mode bits of the file in octal 282*0Sstevel@tonic-gate * and <filename> is the file to be removed 283*0Sstevel@tonic-gate * 284*0Sstevel@tonic-gate */ 285*0Sstevel@tonic-gate if (!SYMLINK && access(path, W_OK) == FAIL && 286*0Sstevel@tonic-gate isatty(fileno(stdin))) { 287*0Sstevel@tonic-gate (void) printf( 288*0Sstevel@tonic-gate gettext("rm: %s: override protection %o (%s/%s)? "), 289*0Sstevel@tonic-gate filepath, buffer.st_mode & 0777, yeschr, nochr); 290*0Sstevel@tonic-gate /* 291*0Sstevel@tonic-gate * If permission isn't given, skip the file. 292*0Sstevel@tonic-gate */ 293*0Sstevel@tonic-gate if (!yes()) { 294*0Sstevel@tonic-gate free(filepath); 295*0Sstevel@tonic-gate return; 296*0Sstevel@tonic-gate } 297*0Sstevel@tonic-gate } 298*0Sstevel@tonic-gate } 299*0Sstevel@tonic-gate 300*0Sstevel@tonic-gate /* 301*0Sstevel@tonic-gate * If the unlink fails, inform the user. For /usr/bin/rm, only inform 302*0Sstevel@tonic-gate * the user if interactive or not silent. 303*0Sstevel@tonic-gate * If unlink fails with errno = ENOENT because file was removed 304*0Sstevel@tonic-gate * in between the lstat call and unlink don't inform the user and 305*0Sstevel@tonic-gate * don't change errcode. 306*0Sstevel@tonic-gate */ 307*0Sstevel@tonic-gate 308*0Sstevel@tonic-gate if (unlink(path) == FAIL) { 309*0Sstevel@tonic-gate if (errno == ENOENT) { 310*0Sstevel@tonic-gate free(filepath); 311*0Sstevel@tonic-gate return; 312*0Sstevel@tonic-gate } 313*0Sstevel@tonic-gate #ifndef XPG4 314*0Sstevel@tonic-gate if (!silent || interactive) { 315*0Sstevel@tonic-gate #endif 316*0Sstevel@tonic-gate (void) fprintf(stderr, 317*0Sstevel@tonic-gate gettext("rm: %s not removed: "), filepath); 318*0Sstevel@tonic-gate perror(""); 319*0Sstevel@tonic-gate #ifndef XPG4 320*0Sstevel@tonic-gate } 321*0Sstevel@tonic-gate #endif 322*0Sstevel@tonic-gate ++errcode; 323*0Sstevel@tonic-gate } 324*0Sstevel@tonic-gate 325*0Sstevel@tonic-gate free(filepath); 326*0Sstevel@tonic-gate } 327*0Sstevel@tonic-gate 328*0Sstevel@tonic-gate static void 329*0Sstevel@tonic-gate undir(char *path, int first, dev_t dev, ino_t ino) 330*0Sstevel@tonic-gate { 331*0Sstevel@tonic-gate char *newpath; 332*0Sstevel@tonic-gate DIR *name; 333*0Sstevel@tonic-gate struct dirent *direct; 334*0Sstevel@tonic-gate int ismypath; 335*0Sstevel@tonic-gate int chdir_failed = 0; 336*0Sstevel@tonic-gate size_t len; 337*0Sstevel@tonic-gate 338*0Sstevel@tonic-gate push_name(path, first); 339*0Sstevel@tonic-gate 340*0Sstevel@tonic-gate /* 341*0Sstevel@tonic-gate * If interactive and this file isn't in the path of the 342*0Sstevel@tonic-gate * current working directory, ask for acknowledgement. 343*0Sstevel@tonic-gate * 344*0Sstevel@tonic-gate * TRANSLATION_NOTE - The following message will contain the 345*0Sstevel@tonic-gate * first character of the strings for "yes" and "no" defined 346*0Sstevel@tonic-gate * in the file "nl_langinfo.po". After substitution, the 347*0Sstevel@tonic-gate * message will appear as follows: 348*0Sstevel@tonic-gate * rm: examine files in directory <directoryname> (y/n)? 349*0Sstevel@tonic-gate * where <directoryname> is the directory to be removed 350*0Sstevel@tonic-gate * 351*0Sstevel@tonic-gate */ 352*0Sstevel@tonic-gate ismypath = mypath(dev, ino); 353*0Sstevel@tonic-gate if (interactive) { 354*0Sstevel@tonic-gate (void) fprintf(stderr, 355*0Sstevel@tonic-gate gettext("rm: examine files in directory %s (%s/%s)? "), 356*0Sstevel@tonic-gate fullpath, yeschr, nochr); 357*0Sstevel@tonic-gate /* 358*0Sstevel@tonic-gate * If the answer is no, skip the directory. 359*0Sstevel@tonic-gate */ 360*0Sstevel@tonic-gate if (!yes()) { 361*0Sstevel@tonic-gate pop_name(first); 362*0Sstevel@tonic-gate return; 363*0Sstevel@tonic-gate } 364*0Sstevel@tonic-gate } 365*0Sstevel@tonic-gate 366*0Sstevel@tonic-gate #ifdef XPG4 367*0Sstevel@tonic-gate /* 368*0Sstevel@tonic-gate * XCU4 and POSIX.2: If not interactive and file is not in the 369*0Sstevel@tonic-gate * path of the current working directory, check to see whether 370*0Sstevel@tonic-gate * or not directory is readable or writable and if not, 371*0Sstevel@tonic-gate * prompt user for response. 372*0Sstevel@tonic-gate */ 373*0Sstevel@tonic-gate if (!interactive && !ismypath && 374*0Sstevel@tonic-gate (access(path, W_OK|X_OK) == FAIL) && isatty(fileno(stdin))) { 375*0Sstevel@tonic-gate if (!silent) { 376*0Sstevel@tonic-gate (void) fprintf(stderr, 377*0Sstevel@tonic-gate gettext( 378*0Sstevel@tonic-gate "rm: examine files in directory %s (%s/%s)? "), 379*0Sstevel@tonic-gate fullpath, yeschr, nochr); 380*0Sstevel@tonic-gate /* 381*0Sstevel@tonic-gate * If the answer is no, skip the directory. 382*0Sstevel@tonic-gate */ 383*0Sstevel@tonic-gate if (!yes()) { 384*0Sstevel@tonic-gate pop_name(first); 385*0Sstevel@tonic-gate return; 386*0Sstevel@tonic-gate } 387*0Sstevel@tonic-gate } 388*0Sstevel@tonic-gate } 389*0Sstevel@tonic-gate #endif 390*0Sstevel@tonic-gate 391*0Sstevel@tonic-gate /* 392*0Sstevel@tonic-gate * Open the directory for reading. 393*0Sstevel@tonic-gate */ 394*0Sstevel@tonic-gate if ((name = opendir(path)) == NULL) { 395*0Sstevel@tonic-gate int saveerrno = errno; 396*0Sstevel@tonic-gate 397*0Sstevel@tonic-gate /* 398*0Sstevel@tonic-gate * If interactive, ask for acknowledgement. 399*0Sstevel@tonic-gate */ 400*0Sstevel@tonic-gate if (interactive) { 401*0Sstevel@tonic-gate /* 402*0Sstevel@tonic-gate * Print an error message that 403*0Sstevel@tonic-gate * we could not read the directory 404*0Sstevel@tonic-gate * as the user wanted to examine 405*0Sstevel@tonic-gate * files in the directory. Only 406*0Sstevel@tonic-gate * affect the error status if 407*0Sstevel@tonic-gate * user doesn't want to remove the 408*0Sstevel@tonic-gate * directory as we still may be able 409*0Sstevel@tonic-gate * remove the directory successfully. 410*0Sstevel@tonic-gate */ 411*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 412*0Sstevel@tonic-gate "rm: cannot read directory %s: "), 413*0Sstevel@tonic-gate fullpath); 414*0Sstevel@tonic-gate errno = saveerrno; 415*0Sstevel@tonic-gate perror(""); 416*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 417*0Sstevel@tonic-gate "rm: remove %s: (%s/%s)? "), 418*0Sstevel@tonic-gate fullpath, yeschr, nochr); 419*0Sstevel@tonic-gate if (!yes()) { 420*0Sstevel@tonic-gate ++errcode; 421*0Sstevel@tonic-gate pop_name(first); 422*0Sstevel@tonic-gate return; 423*0Sstevel@tonic-gate } 424*0Sstevel@tonic-gate } 425*0Sstevel@tonic-gate 426*0Sstevel@tonic-gate /* 427*0Sstevel@tonic-gate * If the directory is empty, we may be able to 428*0Sstevel@tonic-gate * go ahead and remove it. 429*0Sstevel@tonic-gate */ 430*0Sstevel@tonic-gate if (rmdir(path) == FAIL) { 431*0Sstevel@tonic-gate if (interactive) { 432*0Sstevel@tonic-gate int rmdirerr = errno; 433*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 434*0Sstevel@tonic-gate "rm: Unable to remove directory %s: "), 435*0Sstevel@tonic-gate fullpath); 436*0Sstevel@tonic-gate errno = rmdirerr; 437*0Sstevel@tonic-gate perror(""); 438*0Sstevel@tonic-gate } else { 439*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 440*0Sstevel@tonic-gate "rm: cannot read directory %s: "), 441*0Sstevel@tonic-gate fullpath); 442*0Sstevel@tonic-gate errno = saveerrno; 443*0Sstevel@tonic-gate perror(""); 444*0Sstevel@tonic-gate } 445*0Sstevel@tonic-gate ++errcode; 446*0Sstevel@tonic-gate } 447*0Sstevel@tonic-gate 448*0Sstevel@tonic-gate /* Continue to next file/directory rather than exit */ 449*0Sstevel@tonic-gate pop_name(first); 450*0Sstevel@tonic-gate return; 451*0Sstevel@tonic-gate } 452*0Sstevel@tonic-gate 453*0Sstevel@tonic-gate /* 454*0Sstevel@tonic-gate * XCU4 requires that rm -r descend the directory 455*0Sstevel@tonic-gate * hierarchy without regard to PATH_MAX. If we can't 456*0Sstevel@tonic-gate * chdir() do not increment error counter and do not 457*0Sstevel@tonic-gate * print message. 458*0Sstevel@tonic-gate * 459*0Sstevel@tonic-gate * However, if we cannot chdir because someone has taken away 460*0Sstevel@tonic-gate * execute access we may still be able to delete the directory 461*0Sstevel@tonic-gate * if it's empty. The old rm could do this. 462*0Sstevel@tonic-gate */ 463*0Sstevel@tonic-gate 464*0Sstevel@tonic-gate if (chdir(path) == -1) { 465*0Sstevel@tonic-gate chdir_failed = 1; 466*0Sstevel@tonic-gate } 467*0Sstevel@tonic-gate 468*0Sstevel@tonic-gate /* 469*0Sstevel@tonic-gate * Read every directory entry. 470*0Sstevel@tonic-gate */ 471*0Sstevel@tonic-gate while ((direct = readdir(name)) != NULL) { 472*0Sstevel@tonic-gate /* 473*0Sstevel@tonic-gate * Ignore "." and ".." entries. 474*0Sstevel@tonic-gate */ 475*0Sstevel@tonic-gate if (strcmp(direct->d_name, ".") == 0 || 476*0Sstevel@tonic-gate strcmp(direct->d_name, "..") == 0) 477*0Sstevel@tonic-gate continue; 478*0Sstevel@tonic-gate /* 479*0Sstevel@tonic-gate * Try to remove the file. 480*0Sstevel@tonic-gate */ 481*0Sstevel@tonic-gate len = strlen(direct->d_name) + 1; 482*0Sstevel@tonic-gate if (chdir_failed) { 483*0Sstevel@tonic-gate len += strlen(path) + 2; 484*0Sstevel@tonic-gate } 485*0Sstevel@tonic-gate 486*0Sstevel@tonic-gate newpath = malloc(len); 487*0Sstevel@tonic-gate if (newpath == NULL) { 488*0Sstevel@tonic-gate (void) fprintf(stderr, 489*0Sstevel@tonic-gate gettext("rm: Insufficient memory.\n")); 490*0Sstevel@tonic-gate cleanup(); 491*0Sstevel@tonic-gate exit(1); 492*0Sstevel@tonic-gate } 493*0Sstevel@tonic-gate 494*0Sstevel@tonic-gate if (!chdir_failed) { 495*0Sstevel@tonic-gate (void) strcpy(newpath, direct->d_name); 496*0Sstevel@tonic-gate } else { 497*0Sstevel@tonic-gate (void) snprintf(newpath, len, "%s/%s", 498*0Sstevel@tonic-gate path, direct->d_name); 499*0Sstevel@tonic-gate } 500*0Sstevel@tonic-gate 501*0Sstevel@tonic-gate 502*0Sstevel@tonic-gate /* 503*0Sstevel@tonic-gate * If a spare file descriptor is available, just call the 504*0Sstevel@tonic-gate * "rm" function with the file name; otherwise close the 505*0Sstevel@tonic-gate * directory and reopen it when the child is removed. 506*0Sstevel@tonic-gate */ 507*0Sstevel@tonic-gate if (name->dd_fd >= maxfiles) { 508*0Sstevel@tonic-gate (void) closedir(name); 509*0Sstevel@tonic-gate rm(newpath, 0); 510*0Sstevel@tonic-gate if (!chdir_failed) 511*0Sstevel@tonic-gate name = opendir("."); 512*0Sstevel@tonic-gate else 513*0Sstevel@tonic-gate name = opendir(path); 514*0Sstevel@tonic-gate if (name == NULL) { 515*0Sstevel@tonic-gate (void) fprintf(stderr, 516*0Sstevel@tonic-gate gettext("rm: cannot read directory %s: "), 517*0Sstevel@tonic-gate fullpath); 518*0Sstevel@tonic-gate perror(""); 519*0Sstevel@tonic-gate cleanup(); 520*0Sstevel@tonic-gate exit(2); 521*0Sstevel@tonic-gate } 522*0Sstevel@tonic-gate } else 523*0Sstevel@tonic-gate rm(newpath, 0); 524*0Sstevel@tonic-gate 525*0Sstevel@tonic-gate free(newpath); 526*0Sstevel@tonic-gate } 527*0Sstevel@tonic-gate 528*0Sstevel@tonic-gate /* 529*0Sstevel@tonic-gate * Close the directory we just finished reading. 530*0Sstevel@tonic-gate */ 531*0Sstevel@tonic-gate (void) closedir(name); 532*0Sstevel@tonic-gate 533*0Sstevel@tonic-gate /* 534*0Sstevel@tonic-gate * The contents of the directory have been removed. If the 535*0Sstevel@tonic-gate * directory itself is in the path of the current working 536*0Sstevel@tonic-gate * directory, don't try to remove it. 537*0Sstevel@tonic-gate * When the directory itself is the current working directory, mypath() 538*0Sstevel@tonic-gate * has a return code == 2. 539*0Sstevel@tonic-gate * 540*0Sstevel@tonic-gate * XCU4: Because we've descended the directory hierarchy in order 541*0Sstevel@tonic-gate * to avoid PATH_MAX limitation, we must now start ascending 542*0Sstevel@tonic-gate * one level at a time and remove files/directories. 543*0Sstevel@tonic-gate */ 544*0Sstevel@tonic-gate 545*0Sstevel@tonic-gate if (!chdir_failed) { 546*0Sstevel@tonic-gate if (first) 547*0Sstevel@tonic-gate chdir_home(); 548*0Sstevel@tonic-gate else if (chdir("..") == -1) { 549*0Sstevel@tonic-gate (void) fprintf(stderr, 550*0Sstevel@tonic-gate gettext("rm: cannot change to parent of " 551*0Sstevel@tonic-gate "directory %s: "), 552*0Sstevel@tonic-gate fullpath); 553*0Sstevel@tonic-gate perror(""); 554*0Sstevel@tonic-gate cleanup(); 555*0Sstevel@tonic-gate exit(2); 556*0Sstevel@tonic-gate } 557*0Sstevel@tonic-gate } 558*0Sstevel@tonic-gate 559*0Sstevel@tonic-gate switch (ismypath) { 560*0Sstevel@tonic-gate case 3: 561*0Sstevel@tonic-gate pop_name(first); 562*0Sstevel@tonic-gate return; 563*0Sstevel@tonic-gate case 2: 564*0Sstevel@tonic-gate (void) fprintf(stderr, 565*0Sstevel@tonic-gate gettext("rm: Cannot remove any directory in the path " 566*0Sstevel@tonic-gate "of the current working directory\n%s\n"), fullpath); 567*0Sstevel@tonic-gate ++errcode; 568*0Sstevel@tonic-gate pop_name(first); 569*0Sstevel@tonic-gate return; 570*0Sstevel@tonic-gate case 1: 571*0Sstevel@tonic-gate ++errcode; 572*0Sstevel@tonic-gate pop_name(first); 573*0Sstevel@tonic-gate return; 574*0Sstevel@tonic-gate case 0: 575*0Sstevel@tonic-gate break; 576*0Sstevel@tonic-gate } 577*0Sstevel@tonic-gate 578*0Sstevel@tonic-gate /* 579*0Sstevel@tonic-gate * If interactive, ask for acknowledgement. 580*0Sstevel@tonic-gate */ 581*0Sstevel@tonic-gate if (interactive) { 582*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("rm: remove %s: (%s/%s)? "), 583*0Sstevel@tonic-gate fullpath, yeschr, nochr); 584*0Sstevel@tonic-gate if (!yes()) { 585*0Sstevel@tonic-gate pop_name(first); 586*0Sstevel@tonic-gate return; 587*0Sstevel@tonic-gate } 588*0Sstevel@tonic-gate } 589*0Sstevel@tonic-gate if (rmdir(path) == FAIL) { 590*0Sstevel@tonic-gate (void) fprintf(stderr, 591*0Sstevel@tonic-gate gettext("rm: Unable to remove directory %s: "), 592*0Sstevel@tonic-gate fullpath); 593*0Sstevel@tonic-gate perror(""); 594*0Sstevel@tonic-gate ++errcode; 595*0Sstevel@tonic-gate } 596*0Sstevel@tonic-gate pop_name(first); 597*0Sstevel@tonic-gate } 598*0Sstevel@tonic-gate 599*0Sstevel@tonic-gate 600*0Sstevel@tonic-gate static int 601*0Sstevel@tonic-gate yes(void) 602*0Sstevel@tonic-gate { 603*0Sstevel@tonic-gate int i, b; 604*0Sstevel@tonic-gate char ans[SCHAR_MAX + 1]; 605*0Sstevel@tonic-gate 606*0Sstevel@tonic-gate for (i = 0; ; i++) { 607*0Sstevel@tonic-gate b = getchar(); 608*0Sstevel@tonic-gate if (b == '\n' || b == '\0' || b == EOF) { 609*0Sstevel@tonic-gate ans[i] = 0; 610*0Sstevel@tonic-gate break; 611*0Sstevel@tonic-gate } 612*0Sstevel@tonic-gate if (i < SCHAR_MAX) 613*0Sstevel@tonic-gate ans[i] = b; 614*0Sstevel@tonic-gate } 615*0Sstevel@tonic-gate if (i >= SCHAR_MAX) { 616*0Sstevel@tonic-gate i = SCHAR_MAX; 617*0Sstevel@tonic-gate ans[SCHAR_MAX] = 0; 618*0Sstevel@tonic-gate } 619*0Sstevel@tonic-gate if ((i == 0) | (strncmp(yeschr, ans, i))) 620*0Sstevel@tonic-gate return (0); 621*0Sstevel@tonic-gate return (1); 622*0Sstevel@tonic-gate } 623*0Sstevel@tonic-gate 624*0Sstevel@tonic-gate 625*0Sstevel@tonic-gate static int 626*0Sstevel@tonic-gate mypath(dev_t dev, ino_t ino) 627*0Sstevel@tonic-gate { 628*0Sstevel@tonic-gate struct dir_id *curdir; 629*0Sstevel@tonic-gate 630*0Sstevel@tonic-gate /* 631*0Sstevel@tonic-gate * Check to see if this is our current directory 632*0Sstevel@tonic-gate * Indicated by return 2; 633*0Sstevel@tonic-gate */ 634*0Sstevel@tonic-gate if (dev == homedir.dev && ino == homedir.inode) { 635*0Sstevel@tonic-gate return (2); 636*0Sstevel@tonic-gate } 637*0Sstevel@tonic-gate 638*0Sstevel@tonic-gate curdir = homedir.next; 639*0Sstevel@tonic-gate 640*0Sstevel@tonic-gate while (curdir != NULL) { 641*0Sstevel@tonic-gate /* 642*0Sstevel@tonic-gate * If we find a match, the directory (dev, ino) passed to 643*0Sstevel@tonic-gate * mypath() is an ancestor of ours. Indicated by return 3. 644*0Sstevel@tonic-gate */ 645*0Sstevel@tonic-gate if (curdir->dev == dev && curdir->inode == ino) 646*0Sstevel@tonic-gate return (3); 647*0Sstevel@tonic-gate curdir = curdir->next; 648*0Sstevel@tonic-gate } 649*0Sstevel@tonic-gate /* 650*0Sstevel@tonic-gate * parent_err indicates we couldn't stat or chdir to 651*0Sstevel@tonic-gate * one of our parent dirs, so the linked list of dir_id structs 652*0Sstevel@tonic-gate * is incomplete 653*0Sstevel@tonic-gate */ 654*0Sstevel@tonic-gate if (parent_err) { 655*0Sstevel@tonic-gate #ifndef XPG4 656*0Sstevel@tonic-gate if (!silent || interactive) { 657*0Sstevel@tonic-gate #endif 658*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("rm: cannot determine " 659*0Sstevel@tonic-gate "if this is an ancestor of the current " 660*0Sstevel@tonic-gate "working directory\n%s\n"), fullpath); 661*0Sstevel@tonic-gate #ifndef XPG4 662*0Sstevel@tonic-gate } 663*0Sstevel@tonic-gate #endif 664*0Sstevel@tonic-gate /* assume it is. least dangerous */ 665*0Sstevel@tonic-gate return (1); 666*0Sstevel@tonic-gate } 667*0Sstevel@tonic-gate return (0); 668*0Sstevel@tonic-gate } 669*0Sstevel@tonic-gate 670*0Sstevel@tonic-gate static int maxlen; 671*0Sstevel@tonic-gate static int curlen; 672*0Sstevel@tonic-gate 673*0Sstevel@tonic-gate static char * 674*0Sstevel@tonic-gate get_filename(char *name) 675*0Sstevel@tonic-gate { 676*0Sstevel@tonic-gate char *path; 677*0Sstevel@tonic-gate size_t len; 678*0Sstevel@tonic-gate 679*0Sstevel@tonic-gate if (fullpath == NULL || *fullpath == '\0') { 680*0Sstevel@tonic-gate path = strdup(name); 681*0Sstevel@tonic-gate if (path == NULL) { 682*0Sstevel@tonic-gate (void) fprintf(stderr, 683*0Sstevel@tonic-gate gettext("rm: Insufficient memory.\n")); 684*0Sstevel@tonic-gate cleanup(); 685*0Sstevel@tonic-gate exit(1); 686*0Sstevel@tonic-gate } 687*0Sstevel@tonic-gate } else { 688*0Sstevel@tonic-gate len = strlen(fullpath) + strlen(name) + 2; 689*0Sstevel@tonic-gate path = malloc(len); 690*0Sstevel@tonic-gate if (path == NULL) { 691*0Sstevel@tonic-gate (void) fprintf(stderr, 692*0Sstevel@tonic-gate gettext("rm: Insufficient memory.\n")); 693*0Sstevel@tonic-gate cleanup(); 694*0Sstevel@tonic-gate exit(1); 695*0Sstevel@tonic-gate } 696*0Sstevel@tonic-gate (void) snprintf(path, len, "%s/%s", fullpath, name); 697*0Sstevel@tonic-gate } 698*0Sstevel@tonic-gate return (path); 699*0Sstevel@tonic-gate } 700*0Sstevel@tonic-gate 701*0Sstevel@tonic-gate static void 702*0Sstevel@tonic-gate push_name(char *name, int first) 703*0Sstevel@tonic-gate { 704*0Sstevel@tonic-gate int namelen; 705*0Sstevel@tonic-gate 706*0Sstevel@tonic-gate namelen = strlen(name) + 1; /* 1 for "/" */ 707*0Sstevel@tonic-gate if ((curlen + namelen) >= maxlen) { 708*0Sstevel@tonic-gate maxlen += PATH_MAX; 709*0Sstevel@tonic-gate fullpath = (char *)realloc(fullpath, (size_t)(maxlen + 1)); 710*0Sstevel@tonic-gate } 711*0Sstevel@tonic-gate if (first) { 712*0Sstevel@tonic-gate (void) strcpy(fullpath, name); 713*0Sstevel@tonic-gate } else { 714*0Sstevel@tonic-gate (void) strcat(fullpath, "/"); 715*0Sstevel@tonic-gate (void) strcat(fullpath, name); 716*0Sstevel@tonic-gate } 717*0Sstevel@tonic-gate curlen = strlen(fullpath); 718*0Sstevel@tonic-gate } 719*0Sstevel@tonic-gate 720*0Sstevel@tonic-gate static void 721*0Sstevel@tonic-gate pop_name(int first) 722*0Sstevel@tonic-gate { 723*0Sstevel@tonic-gate char *slash; 724*0Sstevel@tonic-gate 725*0Sstevel@tonic-gate if (first) { 726*0Sstevel@tonic-gate *fullpath = '\0'; 727*0Sstevel@tonic-gate return; 728*0Sstevel@tonic-gate } 729*0Sstevel@tonic-gate slash = strrchr(fullpath, '/'); 730*0Sstevel@tonic-gate if (slash) 731*0Sstevel@tonic-gate *slash = '\0'; 732*0Sstevel@tonic-gate else 733*0Sstevel@tonic-gate *fullpath = '\0'; 734*0Sstevel@tonic-gate curlen = strlen(fullpath); 735*0Sstevel@tonic-gate } 736*0Sstevel@tonic-gate 737*0Sstevel@tonic-gate static void 738*0Sstevel@tonic-gate force_chdir(char *dirname) 739*0Sstevel@tonic-gate { 740*0Sstevel@tonic-gate char *pathname, *mp, *tp; 741*0Sstevel@tonic-gate 742*0Sstevel@tonic-gate /* use pathname instead of dirname, so dirname won't be modified */ 743*0Sstevel@tonic-gate if ((pathname = strdup(dirname)) == NULL) { 744*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("rm: strdup: ")); 745*0Sstevel@tonic-gate perror(""); 746*0Sstevel@tonic-gate cleanup(); 747*0Sstevel@tonic-gate exit(2); 748*0Sstevel@tonic-gate } 749*0Sstevel@tonic-gate 750*0Sstevel@tonic-gate /* pathname is an absolute full path from getcwd() */ 751*0Sstevel@tonic-gate mp = pathname; 752*0Sstevel@tonic-gate while (mp) { 753*0Sstevel@tonic-gate tp = strchr(mp, '/'); 754*0Sstevel@tonic-gate if (strlen(mp) >= PATH_MAX) { 755*0Sstevel@tonic-gate /* 756*0Sstevel@tonic-gate * after the first iteration through this 757*0Sstevel@tonic-gate * loop, the below will NULL out the '/' 758*0Sstevel@tonic-gate * which follows the first dir on pathname 759*0Sstevel@tonic-gate */ 760*0Sstevel@tonic-gate *tp = 0; 761*0Sstevel@tonic-gate tp++; 762*0Sstevel@tonic-gate if (*mp == NULL) 763*0Sstevel@tonic-gate ch_dir("/"); 764*0Sstevel@tonic-gate else 765*0Sstevel@tonic-gate /* 766*0Sstevel@tonic-gate * mp points to the start of a dirname, 767*0Sstevel@tonic-gate * terminated by NULL, so ch_dir() 768*0Sstevel@tonic-gate * here will move down one directory 769*0Sstevel@tonic-gate */ 770*0Sstevel@tonic-gate ch_dir(mp); 771*0Sstevel@tonic-gate /* 772*0Sstevel@tonic-gate * reset mp to the start of the dirname 773*0Sstevel@tonic-gate * which follows the one we just chdir'd to 774*0Sstevel@tonic-gate */ 775*0Sstevel@tonic-gate mp = tp; 776*0Sstevel@tonic-gate continue; /* probably can remove this */ 777*0Sstevel@tonic-gate } else { 778*0Sstevel@tonic-gate ch_dir(mp); 779*0Sstevel@tonic-gate break; 780*0Sstevel@tonic-gate } 781*0Sstevel@tonic-gate } 782*0Sstevel@tonic-gate free(pathname); 783*0Sstevel@tonic-gate } 784*0Sstevel@tonic-gate 785*0Sstevel@tonic-gate static void 786*0Sstevel@tonic-gate ch_dir(char *dirname) 787*0Sstevel@tonic-gate { 788*0Sstevel@tonic-gate if (chdir(dirname) == -1) { 789*0Sstevel@tonic-gate (void) fprintf(stderr, 790*0Sstevel@tonic-gate gettext("rm: cannot change to %s directory: "), dirname); 791*0Sstevel@tonic-gate perror(""); 792*0Sstevel@tonic-gate cleanup(); 793*0Sstevel@tonic-gate exit(2); 794*0Sstevel@tonic-gate } 795*0Sstevel@tonic-gate } 796*0Sstevel@tonic-gate 797*0Sstevel@tonic-gate static void 798*0Sstevel@tonic-gate chdir_home(void) 799*0Sstevel@tonic-gate { 800*0Sstevel@tonic-gate /* 801*0Sstevel@tonic-gate * Go back to home dir--the dir from where rm was executed--using 802*0Sstevel@tonic-gate * one of two methods, depending on which method works 803*0Sstevel@tonic-gate * for the given permissions of the home dir and its 804*0Sstevel@tonic-gate * parent directories. 805*0Sstevel@tonic-gate */ 806*0Sstevel@tonic-gate if (homedirfd != -1) { 807*0Sstevel@tonic-gate if (fchdir(homedirfd) == -1) { 808*0Sstevel@tonic-gate (void) fprintf(stderr, 809*0Sstevel@tonic-gate gettext("rm: cannot change to starting " 810*0Sstevel@tonic-gate "directory: ")); 811*0Sstevel@tonic-gate perror(""); 812*0Sstevel@tonic-gate cleanup(); 813*0Sstevel@tonic-gate exit(2); 814*0Sstevel@tonic-gate } 815*0Sstevel@tonic-gate } else { 816*0Sstevel@tonic-gate if (strlen(cwd) < PATH_MAX) 817*0Sstevel@tonic-gate ch_dir(cwd); 818*0Sstevel@tonic-gate else 819*0Sstevel@tonic-gate force_chdir(cwd); 820*0Sstevel@tonic-gate } 821*0Sstevel@tonic-gate } 822*0Sstevel@tonic-gate 823*0Sstevel@tonic-gate /* 824*0Sstevel@tonic-gate * check_homedir - 825*0Sstevel@tonic-gate * is only called the first time rm tries to 826*0Sstevel@tonic-gate * remove a directory. It saves the current directory, i.e., 827*0Sstevel@tonic-gate * home dir, so we can go back to it after traversing elsewhere. 828*0Sstevel@tonic-gate * It also saves all the device and inode numbers of each 829*0Sstevel@tonic-gate * dir from the home dir back to the root in a linked list, so we 830*0Sstevel@tonic-gate * can later check, via mypath(), if we are trying to remove our current 831*0Sstevel@tonic-gate * dir or an ancestor. 832*0Sstevel@tonic-gate */ 833*0Sstevel@tonic-gate static void 834*0Sstevel@tonic-gate check_homedir(void) 835*0Sstevel@tonic-gate { 836*0Sstevel@tonic-gate int size; /* size allocated for pathname of home dir (cwd) */ 837*0Sstevel@tonic-gate struct stat buffer; 838*0Sstevel@tonic-gate struct dir_id *lastdir, *curdir; 839*0Sstevel@tonic-gate 840*0Sstevel@tonic-gate /* 841*0Sstevel@tonic-gate * We need to save where we currently are (the "home dir") so 842*0Sstevel@tonic-gate * we can return after traversing down directories we're 843*0Sstevel@tonic-gate * removing. Two methods are attempted: 844*0Sstevel@tonic-gate * 845*0Sstevel@tonic-gate * 1) open() the home dir so we can use the fd 846*0Sstevel@tonic-gate * to fchdir() back. This requires read permission 847*0Sstevel@tonic-gate * on the home dir. 848*0Sstevel@tonic-gate * 849*0Sstevel@tonic-gate * 2) getcwd() so we can chdir() to go back. This 850*0Sstevel@tonic-gate * requires search (x) permission on the home dir, 851*0Sstevel@tonic-gate * and read and search permission on all parent dirs. Also, 852*0Sstevel@tonic-gate * getcwd() will not work if the home dir is > 341 853*0Sstevel@tonic-gate * directories deep (see open bugid 4033182 - getcwd needs 854*0Sstevel@tonic-gate * to work for pathnames of any depth). 855*0Sstevel@tonic-gate * 856*0Sstevel@tonic-gate * If neither method works, we can't remove any directories 857*0Sstevel@tonic-gate * and rm will fail. 858*0Sstevel@tonic-gate * 859*0Sstevel@tonic-gate * For future enhancement, a possible 3rd option to use 860*0Sstevel@tonic-gate * would be to fork a process to remove a directory, 861*0Sstevel@tonic-gate * eliminating the need to chdir back to the home directory 862*0Sstevel@tonic-gate * and eliminating the permission restrictions on the home dir 863*0Sstevel@tonic-gate * or its parent dirs. 864*0Sstevel@tonic-gate */ 865*0Sstevel@tonic-gate homedirfd = open(".", O_RDONLY); 866*0Sstevel@tonic-gate if (homedirfd == -1) { 867*0Sstevel@tonic-gate size = PATH_MAX; 868*0Sstevel@tonic-gate while ((cwd = getcwd(NULL, size)) == NULL) { 869*0Sstevel@tonic-gate if (errno == ERANGE) { 870*0Sstevel@tonic-gate size = PATH_MAX + size; 871*0Sstevel@tonic-gate continue; 872*0Sstevel@tonic-gate } else { 873*0Sstevel@tonic-gate (void) fprintf(stderr, 874*0Sstevel@tonic-gate gettext("rm: cannot open starting " 875*0Sstevel@tonic-gate "directory: ")); 876*0Sstevel@tonic-gate perror("pwd"); 877*0Sstevel@tonic-gate exit(2); 878*0Sstevel@tonic-gate } 879*0Sstevel@tonic-gate } 880*0Sstevel@tonic-gate } 881*0Sstevel@tonic-gate 882*0Sstevel@tonic-gate /* 883*0Sstevel@tonic-gate * since we exit on error here, we're guaranteed to at least 884*0Sstevel@tonic-gate * have info in the first dir_id struct, homedir 885*0Sstevel@tonic-gate */ 886*0Sstevel@tonic-gate if (stat(".", &buffer) == -1) { 887*0Sstevel@tonic-gate (void) fprintf(stderr, 888*0Sstevel@tonic-gate gettext("rm: cannot stat current directory: ")); 889*0Sstevel@tonic-gate perror(""); 890*0Sstevel@tonic-gate exit(2); 891*0Sstevel@tonic-gate } 892*0Sstevel@tonic-gate homedir.dev = buffer.st_dev; 893*0Sstevel@tonic-gate homedir.inode = buffer.st_ino; 894*0Sstevel@tonic-gate homedir.next = NULL; 895*0Sstevel@tonic-gate 896*0Sstevel@tonic-gate lastdir = &homedir; 897*0Sstevel@tonic-gate /* 898*0Sstevel@tonic-gate * Starting from current working directory, walk toward the 899*0Sstevel@tonic-gate * root, looking at each directory along the way. 900*0Sstevel@tonic-gate */ 901*0Sstevel@tonic-gate for (;;) { 902*0Sstevel@tonic-gate if (chdir("..") == -1 || lstat(".", &buffer) == -1) { 903*0Sstevel@tonic-gate parent_err = 1; 904*0Sstevel@tonic-gate break; 905*0Sstevel@tonic-gate } 906*0Sstevel@tonic-gate 907*0Sstevel@tonic-gate if ((lastdir->next = malloc(sizeof (struct dir_id))) == 908*0Sstevel@tonic-gate NULL) { 909*0Sstevel@tonic-gate (void) fprintf(stderr, 910*0Sstevel@tonic-gate gettext("rm: Insufficient memory.\n")); 911*0Sstevel@tonic-gate cleanup(); 912*0Sstevel@tonic-gate exit(1); 913*0Sstevel@tonic-gate } 914*0Sstevel@tonic-gate 915*0Sstevel@tonic-gate curdir = lastdir->next; 916*0Sstevel@tonic-gate curdir->dev = buffer.st_dev; 917*0Sstevel@tonic-gate curdir->inode = buffer.st_ino; 918*0Sstevel@tonic-gate curdir->next = NULL; 919*0Sstevel@tonic-gate 920*0Sstevel@tonic-gate /* 921*0Sstevel@tonic-gate * Stop when we reach the root; note that chdir("..") 922*0Sstevel@tonic-gate * at the root dir will stay in root. Get rid of 923*0Sstevel@tonic-gate * the redundant dir_id struct for root. 924*0Sstevel@tonic-gate */ 925*0Sstevel@tonic-gate if (curdir->dev == lastdir->dev && curdir->inode == 926*0Sstevel@tonic-gate lastdir->inode) { 927*0Sstevel@tonic-gate lastdir->next = NULL; 928*0Sstevel@tonic-gate free(curdir); 929*0Sstevel@tonic-gate break; 930*0Sstevel@tonic-gate } 931*0Sstevel@tonic-gate 932*0Sstevel@tonic-gate /* loop again to go back another level */ 933*0Sstevel@tonic-gate lastdir = curdir; 934*0Sstevel@tonic-gate } 935*0Sstevel@tonic-gate /* go back to home directory */ 936*0Sstevel@tonic-gate chdir_home(); 937*0Sstevel@tonic-gate } 938*0Sstevel@tonic-gate 939*0Sstevel@tonic-gate /* 940*0Sstevel@tonic-gate * cleanup the dynamically-allocated list of device numbers and inodes, 941*0Sstevel@tonic-gate * if any. If homedir was never used, it is external and static so 942*0Sstevel@tonic-gate * it is guaranteed initialized to zero, thus homedir.next would be NULL. 943*0Sstevel@tonic-gate */ 944*0Sstevel@tonic-gate 945*0Sstevel@tonic-gate static void 946*0Sstevel@tonic-gate cleanup(void) { 947*0Sstevel@tonic-gate 948*0Sstevel@tonic-gate struct dir_id *lastdir, *curdir; 949*0Sstevel@tonic-gate 950*0Sstevel@tonic-gate curdir = homedir.next; 951*0Sstevel@tonic-gate 952*0Sstevel@tonic-gate while (curdir != NULL) { 953*0Sstevel@tonic-gate lastdir = curdir; 954*0Sstevel@tonic-gate curdir = curdir->next; 955*0Sstevel@tonic-gate free(lastdir); 956*0Sstevel@tonic-gate } 957*0Sstevel@tonic-gate } 958