1 /* 2 * Copyright (c) 1983, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1983, 1992, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)mkdir.c 8.2 (Berkeley) 1/25/94 31 * $FreeBSD: src/bin/mkdir/mkdir.c,v 1.19.2.2 2001/08/01 04:42:37 obrien Exp $ 32 */ 33 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 37 #include <err.h> 38 #include <errno.h> 39 #include <libgen.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <sysexits.h> 44 #include <unistd.h> 45 46 static int build(char *, mode_t); 47 static int mkdir_race(const char *path, int nmode); 48 static void usage(void); 49 50 static int vflag; 51 52 int 53 main(int argc, char **argv) 54 { 55 int ch, exitval, success, pflag; 56 void *set; 57 mode_t omode; 58 char *mode; 59 60 pflag = 0; 61 mode = NULL; 62 while ((ch = getopt(argc, argv, "m:pv")) != -1) 63 switch(ch) { 64 case 'm': 65 mode = optarg; 66 break; 67 case 'p': 68 pflag = 1; 69 break; 70 case 'v': 71 vflag = 1; 72 break; 73 default: 74 usage(); 75 } 76 77 argc -= optind; 78 argv += optind; 79 if (argv[0] == NULL) 80 usage(); 81 82 if (mode == NULL) { 83 omode = S_IRWXU | S_IRWXG | S_IRWXO; 84 } else { 85 errno = 0; 86 if ((set = setmode(mode)) == NULL) { 87 if (!errno) 88 errx(1, "invalid file mode: %s", mode); 89 else 90 /* A malloc(3) error, not a invaild file mode. */ 91 err(1, "setmode failed"); 92 } 93 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO); 94 free(set); 95 } 96 97 for (exitval = 0; *argv != NULL; ++argv) { 98 success = 1; 99 if (pflag) { 100 if (build(*argv, omode)) 101 success = 0; 102 } else if (mkdir(*argv, omode) < 0) { 103 if (errno == ENOTDIR || errno == ENOENT) 104 warn("%s", dirname(*argv)); 105 else 106 warn("%s", *argv); 107 success = 0; 108 } else if (vflag) 109 printf("%s\n", *argv); 110 111 if (!success) 112 exitval = 1; 113 /* 114 * The mkdir() and umask() calls both honor only the low 115 * nine bits, so if you try to set a mode including the 116 * sticky, setuid, setgid bits you lose them. Don't do 117 * this unless the user has specifically requested a mode, 118 * as chmod will (obviously) ignore the umask. 119 */ 120 if (success && mode != NULL && chmod(*argv, omode) == -1) { 121 warn("%s", *argv); 122 exitval = 1; 123 } 124 } 125 exit(exitval); 126 } 127 128 static int 129 build(char *path, mode_t omode) 130 { 131 struct stat sb; 132 mode_t numask, oumask; 133 int first, last, retval; 134 char *p; 135 136 p = path; 137 oumask = 0; 138 retval = 0; 139 if (p[0] == '/') /* Skip leading '/'. */ 140 ++p; 141 for (first = 1, last = 0; !last ; ++p) { 142 if (p[0] == '\0') 143 last = 1; 144 else if (p[0] != '/') 145 continue; 146 *p = '\0'; 147 if (!last && p[1] == '\0') 148 last = 1; 149 if (first) { 150 /* 151 * POSIX 1003.2: 152 * For each dir operand that does not name an existing 153 * directory, effects equivalent to those cased by the 154 * following command shall occcur: 155 * 156 * mkdir -p -m $(umask -S),u+wx $(dirname dir) && 157 * mkdir [-m mode] dir 158 * 159 * We change the user's umask and then restore it, 160 * instead of doing chmod's. 161 */ 162 oumask = umask(0); 163 numask = oumask & ~(S_IWUSR | S_IXUSR); 164 umask(numask); 165 first = 0; 166 } 167 if (last) 168 umask(oumask); 169 if (stat(path, &sb)) { 170 if (errno != ENOENT || 171 mkdir_race(path, last ? omode : 172 S_IRWXU | S_IRWXG | S_IRWXO) < 0) { 173 warn("%s", path); 174 retval = 1; 175 break; 176 } else if (vflag) 177 printf("%s\n", path); 178 } 179 else if ((sb.st_mode & S_IFMT) != S_IFDIR) { 180 if (last) 181 errno = EEXIST; 182 else 183 errno = ENOTDIR; 184 warn("%s", path); 185 retval = 1; 186 break; 187 } 188 if (!last) 189 *p = '/'; 190 } 191 if (!first && !last) 192 umask(oumask); 193 return (retval); 194 } 195 196 int 197 mkdir_race(const char *path, int nmode) 198 { 199 int res; 200 struct stat sb; 201 202 res = mkdir(path, nmode); 203 if (res < 0 && errno == EEXIST) { 204 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) 205 return(0); 206 res = mkdir(path, nmode); 207 } 208 return (res); 209 } 210 211 static void 212 usage(void) 213 { 214 215 fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n"); 216 exit (EX_USAGE); 217 } 218