usr/src/cmd/svr4pkg/libinst/srcpath.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /* All Rights Reserved */
  29
  30
  31
  32 #include <limits.h>
  33 #include <string.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38 #include <libinst.h>
  39
  40 char *
  41 srcpath(char *dir, char *src, int part, int nparts)
  42 {
  43         static char tmppath[PATH_MAX];
  44         char    *copy;
  45         size_t  copyLen;
  46
  47         copy = tmppath;
  48
  49         if (dir != NULL) {
  50                 size_t theLen = strlen(dir);
  51
  52                 (void) strcpy(copy, dir);
  53                 copy += theLen;
  54                 copyLen = (sizeof (tmppath) - theLen);
  55         } else {
  56                 copy[0] = '\0';
  57                 copyLen = sizeof (tmppath);
  58         }
  59
  60         if (nparts > 1) {
  61                 (void) snprintf(copy, copyLen,
  62                         ((src[0] == '/') ? "/root.%d%s" : "/reloc.%d/%s"),
  63                         part, src);
  64         } else {
  65                 (void) snprintf(copy, copyLen,
  66                         ((src[0] == '/') ? "/root%s" : "/reloc/%s"), src);
  67         }
  68
  69         return (tmppath);
  70 }
  71
  72 /*
  73  * During a partial install(Ex. Migration of a zone), if the'contchg' field of
  74  * mstat structure is set i.e. there is a mismatch between the entry in pkgmap
  75  * and package database and the file is of type 'f', the source path on the
  76  * Global zone is to be generated(mostly for being copied again to the NGZ).
  77  * Given the local source path(relocatable), this function builds the absolute
  78  * source path.
  79  *
  80  * NOTE: This function is a private interface. Should only be called during a
  81  *       a partial install and for files of type 'f'.
  82  *       Source translation is done differently from 'e' and 'v' types.
  83  */
  84 char *
  85 trans_srcp_pi(char *local_path)
  86 {
  87         static char pi_srcPath[PATH_MAX];
  88         char *tmp_basedir, *tmp_inst_root;
  89         int inst_root_len, basedir_len;
  90
  91         /* Get the basedir and it's length */
  92         tmp_basedir = get_basedir();
  93         basedir_len = strlen(tmp_basedir);
  94
  95         /* Get the install root and it's length */
  96         tmp_inst_root = get_inst_root();
  97         inst_root_len = strlen(tmp_inst_root);
  98
  99         /*
 100          * Get past install root if something exists
 101          * Example:
 102          * INSTROOT = /a (on scratch zone)
 103          * BASEDIR = /a/usr (on scratch zone)
 104          * local_path = "~bin/ls"
 105          *
 106          * Absolute path for source on GZ:
 107          * a) If BASEDIR == INSTROOT
 108          *      /<local_path string starting from index 1>
 109          * In the above example, absolute path is
 110          *      /bin/ls
 111          *
 112          * b) If BASEDIR > INSTROOT
 113          *      /usr/<local_path string starting from index 1>
 114          * In the above example, absolute path is
 115          *      /usr/bin/ls
 116          */
 117         if ((strncmp(tmp_inst_root, tmp_basedir, inst_root_len) == 0) &&
 118             (inst_root_len == basedir_len)) {
 119                 /*
 120                  * Prefix root to the local path. NOTE that local_path[0]
 121                  * has a '~' character. Move past it.
 122                  *
 123                  * NOTE: local_path array size is expected to be >= 2.
 124                  */
 125                 (void) snprintf(pi_srcPath, PATH_MAX, "/%s",
 126                     &(local_path[1]));
 127         } else {
 128                 /*
 129                  * NOTE: local_path array size is expected to be >= 2.
 130                  */
 131                 (void) snprintf(pi_srcPath, PATH_MAX, "%s/%s",
 132                     &(tmp_basedir[inst_root_len]), &(local_path[1]));
 133         }
 134
 135         return (pi_srcPath);
 136 }