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 "pwupd.h" 45 46 void 47 copymkdir(char const * dir, char const * skel, mode_t mode, uid_t uid, gid_t gid) 48 { 49 char src[MAXPATHLEN]; 50 char dst[MAXPATHLEN]; 51 char lnk[MAXPATHLEN]; 52 int len; 53 54 if (mkdir(dir, mode) != 0 && errno != EEXIST) { 55 warn("mkdir(%s)", dir); 56 } else { 57 int infd, outfd; 58 struct stat st; 59 60 static char counter = 0; 61 static char *copybuf = NULL; 62 63 ++counter; 64 chown(dir, uid, gid); 65 if (skel != NULL && *skel != '\0') { 66 DIR *d = opendir(skel); 67 68 if (d != NULL) { 69 struct dirent *e; 70 71 while ((e = readdir(d)) != NULL) { 72 char *p = e->d_name; 73 74 if (snprintf(src, sizeof(src), "%s/%s", skel, p) >= (int)sizeof(src)) 75 warn("warning: pathname too long '%s/%s' (skel not copied)", skel, p); 76 else if (lstat(src, &st) == 0) { 77 if (strncmp(p, "dot.", 4) == 0) /* Conversion */ 78 p += 3; 79 if (snprintf(dst, sizeof(dst), "%s/%s", dir, p) >= (int)sizeof(dst)) 80 warn("warning: path too long '%s/%s' (skel file skipped)", dir, p); 81 else { 82 if (S_ISDIR(st.st_mode)) { /* Recurse for this */ 83 if (strcmp(e->d_name, ".") != 0 && strcmp(e->d_name, "..") != 0) 84 copymkdir(dst, src, (st.st_mode & 0777), uid, gid); 85 chflags(dst, st.st_flags); /* propogate flags */ 86 } else if (S_ISLNK(st.st_mode) && (len = readlink(src, lnk, sizeof(lnk))) != -1) { 87 lnk[len] = '\0'; 88 symlink(lnk, dst); 89 lchown(dst, uid, gid); 90 /* 91 * Note: don't propogate special attributes 92 * but do propogate file flags 93 */ 94 } else if (S_ISREG(st.st_mode) && (outfd = open(dst, O_RDWR | O_CREAT | O_EXCL, st.st_mode)) != -1) { 95 if ((infd = open(src, O_RDONLY)) == -1) { 96 close(outfd); 97 remove(dst); 98 } else { 99 int b; 100 101 /* 102 * Allocate our copy buffer if we need to 103 */ 104 if (copybuf == NULL) 105 copybuf = malloc(4096); 106 while ((b = read(infd, copybuf, 4096)) > 0) 107 write(outfd, copybuf, b); 108 close(infd); 109 /* 110 * Propogate special filesystem flags 111 */ 112 fchown(outfd, uid, gid); 113 fchflags(outfd, st.st_flags); 114 close(outfd); 115 chown(dst, uid, gid); 116 } 117 } 118 } 119 } 120 } 121 closedir(d); 122 } 123 } 124 if (--counter == 0 && copybuf != NULL) { 125 free(copybuf); 126 copybuf = NULL; 127 } 128 } 129 } 130 131