pw/cpdir.c

   1 /*-
   2  * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>.
   3  * 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 as
  10  *    the first lines of this file unmodified.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by David L. Nugent.
  17  * 4. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      $Id$
  33  */
  34
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <stdlib.h>
  38 #include <fcntl.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <dirent.h>
  42 #include <unistd.h>
  43 #include <sys/param.h>
  44 #include <errno.h>
  45
  46 #include "pwupd.h"
  47
  48 void
  49 copymkdir(char const * dir, char const * skel, mode_t mode, uid_t uid, gid_t gid)
  50 {
  51         int             rc = 0;
  52         char            src[MAXPATHLEN];
  53         char            dst[MAXPATHLEN];
  54
  55         if (mkdir(dir, mode) != 0 && errno != EEXIST) {
  56                 sprintf(src, "mkdir(%s)", dir);
  57                 perror(src);
  58         } else {
  59                 int             infd, outfd;
  60                 struct stat     st;
  61
  62                 static char     counter = 0;
  63                 static char    *copybuf = NULL;
  64
  65                 ++counter;
  66                 chown(dir, uid, gid);
  67                 if (skel == NULL || *skel == '\0')
  68                         rc = 1;
  69                 else {
  70                         DIR            *d = opendir(skel);
  71
  72                         if (d != NULL) {
  73                                 struct dirent  *e;
  74
  75                                 while ((e = readdir(d)) != NULL) {
  76                                         char           *p = e->d_name;
  77
  78                                         sprintf(src, "%s/%s", skel, p);
  79                                         if (stat(src, &st) == 0) {
  80                                                 if (strncmp(p, "dot.", 4) == 0) /* Conversion */
  81                                                         p += 3;
  82                                                 sprintf(dst, "%s/%s", dir, p);
  83                                                 if (S_ISDIR(st.st_mode)) {      /* Recurse for this */
  84                                                         if (strcmp(e->d_name, ".") != 0 && strcmp(e->d_name, "..") != 0)
  85                                                                 copymkdir(dst, src, (st.st_mode & 0777), uid, gid);
  86                                                         /*
  87                                                          * Note: don't propogate 'special' attributes
  88                                                          */
  89                                                 } else if (S_ISREG(st.st_mode) && (outfd = open(dst, O_RDWR | O_CREAT | O_EXCL, st.st_mode)) != -1) {
  90                                                         if ((infd = open(src, O_RDONLY)) == -1) {
  91                                                                 close(outfd);
  92                                                                 remove(dst);
  93                                                         } else {
  94                                                                 int             b;
  95
  96                                                                 /*
  97                                                                  * Allocate our copy buffer if we need to
  98                                                                  */
  99                                                                 if (copybuf == NULL)
 100                                                                         copybuf = malloc(4096);
 101                                                                 while ((b = read(infd, copybuf, 4096)) > 0)
 102                                                                         write(outfd, copybuf, b);
 103                                                                 close(infd);
 104                                                                 close(outfd);
 105                                                                 chown(dst, uid, gid);
 106                                                         }
 107                                                 }
 108                                         }
 109                                 }
 110                                 closedir(d);
 111                         }
 112                 }
 113                 if (--counter == 0 && copybuf != NULL) {
 114                         free(copybuf);
 115                         copybuf = NULL;
 116                 }
 117         }
 118 }