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 <dirent.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 #include "pw.h" 40 #include "pwupd.h" 41 42 void 43 copymkdir(int rootfd, char const * dir, int skelfd, mode_t mode, uid_t uid, 44 gid_t gid, int flags) 45 { 46 char *p, lnk[MAXPATHLEN], copybuf[4096]; 47 int len, homefd, srcfd, destfd; 48 ssize_t sz; 49 struct stat st; 50 struct dirent *e; 51 DIR *d; 52 53 if (*dir == '/') 54 dir++; 55 56 if (mkdirat(rootfd, dir, mode) != 0 && errno != EEXIST) { 57 warn("mkdir(%s)", dir); 58 return; 59 } 60 fchownat(rootfd, dir, uid, gid, AT_SYMLINK_NOFOLLOW); 61 if (flags > 0) 62 chflagsat(rootfd, dir, flags, AT_SYMLINK_NOFOLLOW); 63 64 if (skelfd == -1) 65 return; 66 67 homefd = openat(rootfd, dir, O_DIRECTORY); 68 if ((d = fdopendir(skelfd)) == NULL) { 69 close(skelfd); 70 close(homefd); 71 return; 72 } 73 74 while ((e = readdir(d)) != NULL) { 75 if (strcmp(e->d_name, ".") == 0 || strcmp(e->d_name, "..") == 0) 76 continue; 77 78 p = e->d_name; 79 if (fstatat(skelfd, p, &st, AT_SYMLINK_NOFOLLOW) == -1) 80 continue; 81 82 if (strncmp(p, "dot.", 4) == 0) /* Conversion */ 83 p += 3; 84 85 if (S_ISDIR(st.st_mode)) { 86 copymkdir(homefd, p, openat(skelfd, e->d_name, O_DIRECTORY), 87 st.st_mode & _DEF_DIRMODE, uid, gid, st.st_flags); 88 continue; 89 } 90 91 if (S_ISLNK(st.st_mode) && 92 (len = readlinkat(skelfd, e->d_name, lnk, sizeof(lnk) -1)) 93 != -1) { 94 lnk[len] = '\0'; 95 symlinkat(lnk, homefd, p); 96 fchownat(homefd, p, uid, gid, AT_SYMLINK_NOFOLLOW); 97 continue; 98 } 99 100 if (!S_ISREG(st.st_mode)) 101 continue; 102 103 if ((srcfd = openat(skelfd, e->d_name, O_RDONLY)) == -1) 104 continue; 105 destfd = openat(homefd, p, O_RDWR | O_CREAT | O_EXCL, 106 st.st_mode); 107 if (destfd == -1) { 108 close(srcfd); 109 continue; 110 } 111 112 while ((sz = read(srcfd, copybuf, sizeof(copybuf))) > 0) 113 write(destfd, copybuf, sz); 114 115 close(srcfd); 116 /* 117 * Propagate special filesystem flags 118 */ 119 fchown(destfd, uid, gid); 120 fchflags(destfd, st.st_flags); 121 close(destfd); 122 } 123 closedir(d); 124 } 125