1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. 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 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/pw/cpdir.c,v 1.11 2012/02/14 10:17:03 kevlo Exp $ 27 */ 28 29 #include <err.h> 30 #include <errno.h> 31 #include <fcntl.h> 32 #include <stdio.h> 33 #include <string.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 #include <sys/param.h> 39 #include <dirent.h> 40 41 #include "pw.h" 42 #include "pwupd.h" 43 44 void 45 copymkdir(char const * dir, char const * skel, mode_t mode, uid_t uid, gid_t gid) 46 { 47 char src[MAXPATHLEN]; 48 char dst[MAXPATHLEN]; 49 char lnk[MAXPATHLEN]; 50 int len; 51 52 if (mkdir(dir, mode) != 0 && errno != EEXIST) { 53 warn("mkdir(%s)", dir); 54 } else { 55 int infd, outfd; 56 struct stat st; 57 58 static char counter = 0; 59 static char *copybuf = NULL; 60 61 ++counter; 62 chown(dir, uid, gid); 63 if (skel != NULL && *skel != '\0') { 64 DIR *d = opendir(skel); 65 66 if (d != NULL) { 67 struct dirent *e; 68 69 while ((e = readdir(d)) != NULL) { 70 char *p = e->d_name; 71 72 if (snprintf(src, sizeof(src), "%s/%s", skel, p) >= (int)sizeof(src)) 73 warn("warning: pathname too long '%s/%s' (skel not copied)", skel, p); 74 else if (lstat(src, &st) == 0) { 75 if (strncmp(p, "dot.", 4) == 0) /* Conversion */ 76 p += 3; 77 if (snprintf(dst, sizeof(dst), "%s/%s", dir, p) >= (int)sizeof(dst)) 78 warn("warning: path too long '%s/%s' (skel file skipped)", dir, p); 79 else { 80 if (S_ISDIR(st.st_mode)) { /* Recurse for this */ 81 if (strcmp(e->d_name, ".") != 0 && strcmp(e->d_name, "..") != 0) { 82 copymkdir(dst, src, st.st_mode & _DEF_DIRMODE, uid, gid); 83 chflags(dst, st.st_flags); /* propagate flags */ 84 } 85 } else if (S_ISLNK(st.st_mode) && (len = readlink(src, lnk, sizeof(lnk) - 1)) != -1) { 86 lnk[len] = '\0'; 87 symlink(lnk, dst); 88 lchown(dst, uid, gid); 89 /* 90 * Note: don't propagate special attributes 91 * but do propagate file flags 92 */ 93 } else if (S_ISREG(st.st_mode) && (outfd = open(dst, O_RDWR | O_CREAT | O_EXCL, st.st_mode)) != -1) { 94 if ((infd = open(src, O_RDONLY)) == -1) { 95 close(outfd); 96 remove(dst); 97 } else { 98 int b; 99 100 /* 101 * Allocate our copy buffer if we need to 102 */ 103 if (copybuf == NULL) 104 copybuf = malloc(4096); 105 while ((b = read(infd, copybuf, 4096)) > 0) 106 write(outfd, copybuf, b); 107 close(infd); 108 /* 109 * Propagate special filesystem flags 110 */ 111 fchown(outfd, uid, gid); 112 fchflags(outfd, st.st_flags); 113 close(outfd); 114 chown(dst, uid, gid); 115 } 116 } 117 } 118 } 119 } 120 closedir(d); 121 } 122 } 123 if (--counter == 0 && copybuf != NULL) { 124 free(copybuf); 125 copybuf = NULL; 126 } 127 } 128 } 129 130