4.104.114.84.95
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1 | /* |
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2 | * chroot() - Change Root Directory |
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3 | * Author: fernando.ruiz@ctv.es |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems.h> |
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20 | |
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21 | #include <unistd.h> |
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22 | #include <errno.h> |
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23 | |
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24 | #include <rtems/libio_.h> |
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25 | #include <rtems/seterr.h> |
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26 | |
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27 | int chroot( |
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28 | const char *pathname |
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29 | ) |
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30 | { |
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31 | int result; |
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32 | rtems_filesystem_location_info_t loc; |
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33 | |
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34 | /* an automatic call to new private env the first time */ |
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35 | if (rtems_current_user_env == &rtems_global_user_env) { |
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36 | rtems_libio_set_private_env(); /* try to set a new private env*/ |
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37 | if (rtems_current_user_env == &rtems_global_user_env) /* not ok */ |
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38 | rtems_set_errno_and_return_minus_one( ENOTSUP ); |
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39 | }; |
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40 | |
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41 | result = chdir(pathname); |
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42 | if (result) { |
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43 | rtems_set_errno_and_return_minus_one( errno ); |
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44 | }; |
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45 | /* clone the new root location */ |
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46 | if (rtems_filesystem_evaluate_path(".", 0, &loc, 0)) { |
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47 | /* our cwd has changed, though - but there is no easy way of return :-( */ |
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48 | rtems_set_errno_and_return_minus_one( errno ); |
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49 | } |
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50 | rtems_filesystem_freenode(&rtems_filesystem_root); |
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51 | rtems_filesystem_root = loc; |
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52 | |
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53 | return 0; |
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54 | } |
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