1 /* $OpenBSD: rm.c,v 1.11 2016/10/10 18:13:21 tedu Exp $ */ 2 /* $NetBSD: rm.c,v 1.19 1995/09/07 06:48:50 jtc Exp $ */ 3 4 /*- 5 * Copyright (c) 1990, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <fts.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 static int eval; 45 46 static void checkdot(char **); 47 static void rm_tree(char **); 48 49 int 50 rmmain(int argc, char *argv[]) 51 { 52 53 checkdot(argv); 54 55 if (*argv) 56 rm_tree(argv); 57 58 return (eval); 59 } 60 61 static void 62 rm_tree(char **argv) 63 { 64 FTS *fts; 65 FTSENT *p; 66 int flags; 67 68 flags = FTS_PHYSICAL; 69 flags |= FTS_NOSTAT; 70 if (!(fts = fts_open(argv, flags, NULL))) 71 err(1, NULL); 72 while ((p = fts_read(fts)) != NULL) { 73 switch (p->fts_info) { 74 case FTS_DNR: 75 if (p->fts_errno != ENOENT) { 76 warnx("%s: %s", 77 p->fts_path, strerror(p->fts_errno)); 78 eval = 1; 79 } 80 continue; 81 case FTS_ERR: 82 errc(1, p->fts_errno, "%s", p->fts_path); 83 case FTS_D: 84 continue; 85 default: 86 break; 87 } 88 89 /* 90 * If we can't read or search the directory, may still be 91 * able to remove it. Don't print out the un{read,search}able 92 * message unless the remove fails. 93 */ 94 switch (p->fts_info) { 95 case FTS_DP: 96 case FTS_DNR: 97 if (!rmdir(p->fts_accpath) || 98 (errno == ENOENT)) 99 continue; 100 break; 101 102 case FTS_F: 103 case FTS_NSOK: 104 default: 105 if (!unlink(p->fts_accpath) || 106 (errno == ENOENT)) 107 continue; 108 } 109 warn("%s", p->fts_path); 110 eval = 1; 111 } 112 if (errno) 113 err(1, "fts_read"); 114 fts_close(fts); 115 } 116 117 /* 118 * POSIX.2 requires that if "." or ".." are specified as the basename 119 * portion of an operand, a diagnostic message be written to standard 120 * error and nothing more be done with such operands. 121 * 122 * Since POSIX.2 defines basename as the final portion of a path after 123 * trailing slashes have been removed, we'll remove them here. 124 */ 125 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2]))) 126 static void 127 checkdot(char **argv) 128 { 129 char *p, **save, **t; 130 int complained; 131 132 complained = 0; 133 for (t = argv; *t;) { 134 /* strip trailing slashes */ 135 p = strrchr (*t, '\0'); 136 while (--p > *t && *p == '/') 137 *p = '\0'; 138 139 /* extract basename */ 140 if ((p = strrchr(*t, '/')) != NULL) 141 ++p; 142 else 143 p = *t; 144 145 if (ISDOT(p)) { 146 if (!complained++) 147 warnx("\".\" and \"..\" may not be removed"); 148 eval = 1; 149 for (save = t; (t[0] = t[1]) != NULL; ++t) 150 continue; 151 t = save; 152 } else 153 ++t; 154 } 155 } 156