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2 | pj | 1 | |
1063 | tullio | 2 | /* |
3 | * This program is free software; you can redistribute it and/or modify |
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4 | * it under the terms of the GNU General Public License as published by |
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5 | * the Free Software Foundation; either version 2 of the License, or |
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6 | * (at your option) any later version. |
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7 | * |
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8 | * This program is distributed in the hope that it will be useful, |
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9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 | * GNU General Public License for more details. |
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12 | * |
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13 | * You should have received a copy of the GNU General Public License |
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14 | * along with this program; if not, write to the Free Software |
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15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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16 | * |
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17 | */ |
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18 | |||
2 | pj | 19 | #include <fs/types.h> |
20 | #include <fs/errno.h> |
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21 | #include <fs/task.h> |
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22 | #include <fs/util.h> |
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23 | #include <fs/maccess.h> |
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24 | |||
25 | #include "file.h" |
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26 | #include "dentry.h" |
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27 | #include "fs.h" |
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28 | |||
29 | int k_chdir(char *newpath) |
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30 | { |
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31 | declare_buffer(char,pathname,MAXPATHNAME); |
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32 | int createflag=DENTRY_NOCREATE; |
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33 | struct dentry *d; |
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34 | __pid_t pid; |
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35 | int len; |
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36 | |||
37 | call_to_fs(); |
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38 | |||
39 | len=__verify_read_nolen((char*)newpath); |
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40 | if ((!len)||(len>MAXPATHNAMELEN)) return_from_fs(-EVERIFY); |
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41 | __copy_from_user(pathname,newpath,len+1); |
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42 | |||
43 | pid=__get_pid(); |
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44 | lock_desctable(pid); |
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45 | |||
46 | d=find_dentry_from_ext(cwden_ptr(pid),(char *)pathname,&createflag); |
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47 | if (d==NULL) { |
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48 | unlock_desctable(pid); |
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49 | return_from_fs(-ENOENT); |
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50 | } |
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51 | |||
52 | unlock_dentry(cwden_ptr(pid)); |
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53 | /* dovrebbe essere: cwden_ptr(pid)=d; */ |
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54 | desctable[pid].fd_cwden=d; |
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55 | strcpy(cwd_ptr(pid),pathname); |
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56 | |||
57 | unlock_desctable(pid); |
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58 | return_from_fs(EOK); |
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59 | } |