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