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 27 #ifndef lint 28 static const char rcsid[] = 29 "$FreeBSD$"; 30 #endif /* not lint */ 31 32 #include <err.h> 33 #include <errno.h> 34 #include <fcntl.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <sys/param.h> 42 #include <dirent.h> 43 44 #include "pw.h" 45 #include "pwupd.h" 46 47 void 48 copymkdir(int rootfd, char const * dir, int skelfd, mode_t mode, uid_t uid, 49 gid_t gid, int flags) 50 { 51 char *p, lnk[MAXPATHLEN], copybuf[4096]; 52 int len, homefd, srcfd, destfd; 53 ssize_t sz; 54 struct stat st; 55 struct dirent *e; 56 DIR *d; 57 58 if (*dir == '/') 59 dir++; 60 61 if (mkdirat(rootfd, dir, mode) != 0 && errno != EEXIST) { 62 warn("mkdir(%s)", dir); 63 return; 64 } 65 fchownat(rootfd, dir, uid, gid, AT_SYMLINK_NOFOLLOW); 66 if (flags > 0) 67 chflagsat(rootfd, dir, flags, AT_SYMLINK_NOFOLLOW); 68 69 if (skelfd == -1) 70 return; 71 72 homefd = openat(rootfd, dir, O_DIRECTORY); 73 if ((d = fdopendir(skelfd)) == NULL) { 74 close(skelfd); 75 close(homefd); 76 return; 77 } 78 79 while ((e = readdir(d)) != NULL) { 80 if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0) 81 continue; 82 83 p = e->d_name; 84 if (fstatat(skelfd, p, &st, AT_SYMLINK_NOFOLLOW) == -1) 85 continue; 86 87 if (strncmp(p, "dot.", 4) == 0) /* Conversion */ 88 p += 3; 89 90 if (S_ISDIR(st.st_mode)) { 91 copymkdir(homefd, p, openat(skelfd, e->d_name, O_DIRECTORY), 92 st.st_mode & _DEF_DIRMODE, uid, gid, st.st_flags); 93 continue; 94 } 95 96 if (S_ISLNK(st.st_mode) && 97 (len = readlinkat(skelfd, e->d_name, lnk, sizeof(lnk) -1)) 98 != -1) { 99 lnk[len] = '\0'; 100 symlinkat(lnk, homefd, p); 101 fchownat(homefd, p, uid, gid, AT_SYMLINK_NOFOLLOW); 102 continue; 103 } 104 105 if (!S_ISREG(st.st_mode)) 106 continue; 107 108 if ((srcfd = openat(skelfd, e->d_name, O_RDONLY)) == -1) 109 continue; 110 destfd = openat(homefd, p, O_RDWR | O_CREAT | O_EXCL, 111 st.st_mode); 112 if (destfd == -1) { 113 close(srcfd); 114 continue; 115 } 116 117 while ((sz = read(srcfd, copybuf, sizeof(copybuf))) > 0) 118 write(destfd, copybuf, sz); 119 120 close(srcfd); 121 /* 122 * Propagate special filesystem flags 123 */ 124 fchown(destfd, uid, gid); 125 fchflags(destfd, st.st_flags); 126 close(destfd); 127 } 128 closedir(d); 129 } 130