mkdir.c revision 40602
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 34#ifndef lint 35static char const copyright[] = 36"@(#) Copyright (c) 1983, 1992, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#ifndef lint 41#if 0 42static char sccsid[] = "@(#)mkdir.c 8.2 (Berkeley) 1/25/94"; 43#endif 44static const char rcsid[] = 45 "$Id: mkdir.c,v 1.13 1998/10/20 08:04:15 msmith Exp $"; 46#endif /* not lint */ 47 48#include <sys/types.h> 49#include <sys/stat.h> 50 51#include <err.h> 52#include <errno.h> 53#include <stdio.h> 54#include <stdlib.h> 55#include <string.h> 56#include <unistd.h> 57 58int build __P((char *, mode_t)); 59void usage __P((void)); 60 61int 62main(argc, argv) 63 int argc; 64 char *argv[]; 65{ 66 int ch, exitval, omode, pflag; 67 mode_t *set = (mode_t *)NULL; 68 char *mode; 69 70 omode = pflag = 0; 71 mode = NULL; 72 while ((ch = getopt(argc, argv, "m:p")) != -1) 73 switch(ch) { 74 case 'p': 75 pflag = 1; 76 break; 77 case 'm': 78 mode = optarg; 79 break; 80 case '?': 81 default: 82 usage(); 83 } 84 85 argc -= optind; 86 argv += optind; 87 if (argv[0] == NULL) 88 usage(); 89 90 if (mode == NULL) { 91 omode = S_IRWXU | S_IRWXG | S_IRWXO; 92 } else { 93 if ((set = setmode(mode)) == NULL) 94 errx(1, "invalid file mode: %s", mode); 95 omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO); 96 } 97 98 for (exitval = 0; *argv != NULL; ++argv) { 99 if (pflag) { 100 if (build(*argv, omode)) 101 exitval = 1; 102 } else if (mkdir(*argv, omode) < 0) { 103 warn("%s", *argv); 104 exitval = 1; 105 } 106 /* 107 * The mkdir() and umask() calls both honor only the low 108 * nine bits, so if you try to set a mode including the 109 * sticky, setuid, setgid bits you lose them. Don't do 110 * this unless the user has specifically requested a mode, 111 * as chmod will (obviously) ignore the umask. 112 */ 113 if ((exitval == 0) && 114 (mode != NULL) && (chmod(*argv, omode) == -1)) { 115 warn("chmod %s", *argv); 116 exitval = 1; 117 } 118 } 119 exit(exitval); 120} 121 122int 123build(path, omode) 124 char *path; 125 mode_t omode; 126{ 127 struct stat sb; 128 mode_t numask, oumask; 129 int first, last, retval; 130 char *p; 131 132 p = path; 133 oumask = 0; 134 retval = 0; 135 if (p[0] == '/') /* Skip leading '/'. */ 136 ++p; 137 for (first = 1, last = 0; !last ; ++p) { 138 if (p[0] == '\0') 139 last = 1; 140 else if (p[0] != '/') 141 continue; 142 *p = '\0'; 143 if (p[1] == '\0') 144 last = 1; 145 if (first) { 146 /* 147 * POSIX 1003.2: 148 * For each dir operand that does not name an existing 149 * directory, effects equivalent to those cased by the 150 * following command shall occcur: 151 * 152 * mkdir -p -m $(umask -S),u+wx $(dirname dir) && 153 * mkdir [-m mode] dir 154 * 155 * We change the user's umask and then restore it, 156 * instead of doing chmod's. 157 */ 158 oumask = umask(0); 159 numask = oumask & ~(S_IWUSR | S_IXUSR); 160 (void)umask(numask); 161 first = 0; 162 } 163 if (last) 164 (void)umask(oumask); 165 if (stat(path, &sb)) { 166 if (errno != ENOENT || 167 mkdir(path, last ? omode : 168 S_IRWXU | S_IRWXG | S_IRWXO) < 0) { 169 warn("%s", path); 170 retval = 1; 171 break; 172 } 173 } 174 else if ((sb.st_mode & S_IFMT) != S_IFDIR) { 175 if (last) 176 errno = EEXIST; 177 else 178 errno = ENOTDIR; 179 warn("%s", path); 180 retval = 1; 181 break; 182 } 183 if (!last) 184 *p = '/'; 185 } 186 if (!first && !last) 187 (void)umask(oumask); 188 return (retval); 189} 190 191void 192usage() 193{ 194 (void)fprintf(stderr, "usage: mkdir [-p] [-m mode] directory ...\n"); 195 exit (1); 196} 197