4.104.114.84.95
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1 | /* |
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2 | * IMFS file change mode routine. |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #include <errno.h> |
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15 | |
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16 | #include "libio_.h" |
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17 | #include "imfs.h" |
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18 | |
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19 | int IMFS_fchmod( |
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20 | rtems_filesystem_location_info_t *loc, |
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21 | mode_t mode |
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22 | ) |
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23 | { |
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24 | IMFS_jnode_t *jnode; |
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25 | #if defined(RTEMS_POSIX_API) |
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26 | uid_t st_uid; |
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27 | #endif |
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28 | |
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29 | jnode = loc->node_access; |
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30 | |
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31 | /* |
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32 | * Verify I am the owner of the node or the super user. |
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33 | */ |
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34 | #if defined(RTEMS_POSIX_API) |
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35 | st_uid = geteuid(); |
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36 | |
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37 | if ( ( st_uid != jnode->st_uid ) && ( st_uid != 0 ) ) |
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38 | set_errno_and_return_minus_one( EPERM ); |
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39 | #endif |
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40 | |
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41 | /* |
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42 | * Change only the RWX permissions on the jnode to mode. |
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43 | */ |
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44 | if ( mode & (~ (S_IRWXU | S_IRWXG | S_IRWXO ) ) ) |
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45 | set_errno_and_return_minus_one( EPERM ); |
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46 | |
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47 | jnode->st_mode &= ~(S_IRWXU | S_IRWXG | S_IRWXO); |
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48 | jnode->st_mode |= mode; |
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49 | |
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50 | IMFS_update_ctime( jnode ); |
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51 | |
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52 | return 0; |
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53 | } |
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54 | |
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