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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1983, 1992, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)mkdir.c 8.2 (Berkeley) 1/25/94 35 * $FreeBSD: src/bin/mkdir/mkdir.c,v 1.19.2.2 2001/08/01 04:42:37 obrien Exp $ 36 * $DragonFly: src/bin/mkdir/mkdir.c,v 1.6 2004/11/07 20:54:51 eirikn Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 42 #include <err.h> 43 #include <errno.h> 44 #include <libgen.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <sysexits.h> 49 #include <unistd.h> 50 51 static int build(char *, mode_t); 52 static int mkdir_race(const char *path, int nmode); 53 static void usage(void); 54 55 int vflag; 56 57 int 58 main(int argc, char **argv) 59 { 60 int ch, exitval, success, pflag; 61 void *set; 62 mode_t omode; 63 char *mode; 64 65 pflag = 0; 66 mode = NULL; 67 while ((ch = getopt(argc, argv, "m:pv")) != -1) 68 switch(ch) { 69 case 'm': 70 mode = optarg; 71 break; 72 case 'p': 73 pflag = 1; 74 break; 75 case 'v': 76 vflag = 1; 77 break; 78 default: 79 usage(); 80 } 81 82 argc -= optind; 83 argv += optind; 84 if (argv[0] == NULL) 85 usage(); 86 87 if (mode == NULL) { 88 omode = S_IRWXU | S_IRWXG | S_IRWXO; 89 } else { 90 errno = 0; 91 if ((set = setmode(mode)) == NULL) { 92 if (!errno) 93 errx(1, "invalid file mode: %s", mode); 94 else 95 /* A malloc(3) error, not a invaild file mode. */ 96 err(1, "setmode failed"); 97 } 98 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO); 99 free(set); 100 } 101 102 for (exitval = 0; *argv != NULL; ++argv) { 103 success = 1; 104 if (pflag) { 105 if (build(*argv, omode)) 106 success = 0; 107 } else if (mkdir(*argv, omode) < 0) { 108 if (errno == ENOTDIR || errno == ENOENT) 109 warn("%s", dirname(*argv)); 110 else 111 warn("%s", *argv); 112 success = 0; 113 } else if (vflag) 114 printf("%s\n", *argv); 115 116 if (!success) 117 exitval = 1; 118 /* 119 * The mkdir() and umask() calls both honor only the low 120 * nine bits, so if you try to set a mode including the 121 * sticky, setuid, setgid bits you lose them. Don't do 122 * this unless the user has specifically requested a mode, 123 * as chmod will (obviously) ignore the umask. 124 */ 125 if (success && mode != NULL && chmod(*argv, omode) == -1) { 126 warn("%s", *argv); 127 exitval = 1; 128 } 129 } 130 exit(exitval); 131 } 132 133 static int 134 build(char *path, mode_t omode) 135 { 136 struct stat sb; 137 mode_t numask, oumask; 138 int first, last, retval; 139 char *p; 140 141 p = path; 142 oumask = 0; 143 retval = 0; 144 if (p[0] == '/') /* Skip leading '/'. */ 145 ++p; 146 for (first = 1, last = 0; !last ; ++p) { 147 if (p[0] == '\0') 148 last = 1; 149 else if (p[0] != '/') 150 continue; 151 *p = '\0'; 152 if (!last && p[1] == '\0') 153 last = 1; 154 if (first) { 155 /* 156 * POSIX 1003.2: 157 * For each dir operand that does not name an existing 158 * directory, effects equivalent to those cased by the 159 * following command shall occcur: 160 * 161 * mkdir -p -m $(umask -S),u+wx $(dirname dir) && 162 * mkdir [-m mode] dir 163 * 164 * We change the user's umask and then restore it, 165 * instead of doing chmod's. 166 */ 167 oumask = umask(0); 168 numask = oumask & ~(S_IWUSR | S_IXUSR); 169 umask(numask); 170 first = 0; 171 } 172 if (last) 173 umask(oumask); 174 if (stat(path, &sb)) { 175 if (errno != ENOENT || 176 mkdir_race(path, last ? omode : 177 S_IRWXU | S_IRWXG | S_IRWXO) < 0) { 178 warn("%s", path); 179 retval = 1; 180 break; 181 } else if (vflag) 182 printf("%s\n", path); 183 } 184 else if ((sb.st_mode & S_IFMT) != S_IFDIR) { 185 if (last) 186 errno = EEXIST; 187 else 188 errno = ENOTDIR; 189 warn("%s", path); 190 retval = 1; 191 break; 192 } 193 if (!last) 194 *p = '/'; 195 } 196 if (!first && !last) 197 umask(oumask); 198 return (retval); 199 } 200 201 int 202 mkdir_race(const char *path, int nmode) 203 { 204 int res; 205 struct stat sb; 206 207 res = mkdir(path, nmode); 208 if (res < 0 && errno == EEXIST) { 209 if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) 210 return(0); 211 res = mkdir(path, nmode); 212 } 213 return (res); 214 } 215 216 static void 217 usage(void) 218 { 219 220 fprintf(stderr, "usage: mkdir [-pv] [-m mode] directory ...\n"); 221 exit (EX_USAGE); 222 } 223