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| Rev 2404 | Rev 2435 | ||
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| Line 30... | Line 30... | ||
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
32 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
33 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | */ |
34 | */ |
| 35 | - | ||
| 36 | 35 | ||
| 37 | /* This file contains the code for performing four system calls relating to |
- | |
| 38 | * status and directories. |
36 | /** @addtogroup FileSystemImpl |
| - | 37 | * @{ |
|
| 39 | */ |
38 | */ |
| 40 | 39 | ||
| 41 | /* Methods: |
40 | /** |
| 42 | * do_chdir: perform the CHDIR system call |
41 | * @file stadir.c |
| 43 | * do_stat: perform the STAT system call |
42 | * @brief This file contains the code for performing four system calls relating to |
| 44 | * do_fstat: perform the FSTAT system call |
43 | * status and directories. |
| 45 | */ |
44 | */ |
| 46 | 45 | ||
| 47 | 46 | ||
| 48 | #include "fs.h" |
47 | #include "fs.h" |
| 49 | #include "stat.h" |
48 | #include "stat.h" |
| Line 53... | Line 52... | ||
| 53 | #include "param.h" |
52 | #include "param.h" |
| 54 | 53 | ||
| 55 | 54 | ||
| 56 | static int change(inode_t **iip, char *name_ptr, int len); |
55 | static int change(inode_t **iip, char *name_ptr, int len); |
| 57 | static int stat_inode(inode_t *rip, filp_t *fil_ptr, char *user_addr); |
56 | static int stat_inode(inode_t *rip, filp_t *fil_ptr, char *user_addr); |
| 58 | 57 | ||
| - | 58 | /** |
|
| - | 59 | * Perform the CHDIR system call |
|
| - | 60 | */ |
|
| 59 | int do_chdir() |
61 | int do_chdir() |
| 60 | { |
62 | { |
| 61 | 63 | ||
| 62 | /* Perform the chdir(file_name) system call */ |
64 | /* Perform the chdir(file_name) system call */ |
| 63 | int r; |
65 | int r; |
| 64 | 66 | ||
| 65 | r = change(&fp->fp_workdir, file_name, strlen(file_name)+1); |
67 | r = change(&fp->fp_workdir, file_name, strlen(file_name)+1); |
| 66 | 68 | ||
| 67 | return r; |
69 | return r; |
| 68 | } |
70 | } |
| - | 71 | ||
| - | 72 | /** |
|
| - | 73 | * Execute changing the current directory |
|
| 69 | 74 | */ |
|
| 70 | int change(inode_t **iip, char *name_ptr, int len) |
75 | int change(inode_t **iip, char *name_ptr, int len) |
| 71 | { |
76 | { |
| 72 | 77 | ||
| 73 | /* |
78 | /* |
| 74 | * iip: pointer to the inode pointer for the dir |
79 | * iip: pointer to the inode pointer for the dir |
| Line 104... | Line 109... | ||
| 104 | put_inode(*iip); /* release the old directory */ |
109 | put_inode(*iip); /* release the old directory */ |
| 105 | *iip = rip; /* acquire the new one */ |
110 | *iip = rip; /* acquire the new one */ |
| 106 | 111 | ||
| 107 | return OK; |
112 | return OK; |
| 108 | } |
113 | } |
| 109 | 114 | ||
| - | 115 | /** |
|
| - | 116 | * Perform the STAT system call |
|
| - | 117 | */ |
|
| 110 | int do_stat() |
118 | int do_stat() |
| 111 | { |
119 | { |
| 112 | 120 | ||
| 113 | /* Perform the stat(name, buf) system call. */ |
121 | /* Perform the stat(name, buf) system call. */ |
| 114 | 122 | ||
| Line 128... | Line 136... | ||
| 128 | r = stat_inode(rip, NIL_FILP, fp->buffer); /* actually do the work.*/ |
136 | r = stat_inode(rip, NIL_FILP, fp->buffer); /* actually do the work.*/ |
| 129 | put_inode(rip); /* release the inode */ |
137 | put_inode(rip); /* release the inode */ |
| 130 | 138 | ||
| 131 | return r; |
139 | return r; |
| 132 | } |
140 | } |
| 133 | 141 | ||
| - | 142 | /** |
|
| - | 143 | * Perform the FSTAT system call |
|
| - | 144 | */ |
|
| 134 | int do_fstat() |
145 | int do_fstat() |
| 135 | { |
146 | { |
| 136 | 147 | ||
| 137 | /* Perform the fstat(fd, buf) system call. */ |
148 | /* Perform the fstat(fd, buf) system call. */ |
| 138 | 149 | ||
| Line 146... | Line 157... | ||
| 146 | if (rfilp->filp_ino == NIL_INODE) |
157 | if (rfilp->filp_ino == NIL_INODE) |
| 147 | return FS_ENOENT; |
158 | return FS_ENOENT; |
| 148 | 159 | ||
| 149 | return(stat_inode(rfilp->filp_ino, NIL_FILP, fp->buffer)); |
160 | return(stat_inode(rfilp->filp_ino, NIL_FILP, fp->buffer)); |
| 150 | } |
161 | } |
| 151 | 162 | ||
| - | 163 | /** |
|
| - | 164 | * Execute the actual STAT operation |
|
| - | 165 | */ |
|
| 152 | int stat_inode(register inode_t *rip, filp_t *fil_ptr, char *user_addr) |
166 | int stat_inode(register inode_t *rip, filp_t *fil_ptr, char *user_addr) |
| 153 | { |
167 | { |
| 154 | 168 | ||
| 155 | /* |
169 | /* |
| 156 | * rip: pointer to inode to stat |
170 | * rip: pointer to inode to stat |
| Line 172... | Line 186... | ||
| 172 | memcpy(user_addr, &statbuf, sizeof(statbuf)); |
186 | memcpy(user_addr, &statbuf, sizeof(statbuf)); |
| 173 | 187 | ||
| 174 | return OK; |
188 | return OK; |
| 175 | } |
189 | } |
| 176 | 190 | ||
| - | 191 | ||
| - | 192 | /** |
|
| - | 193 | * } |
|
| - | 194 | */ |
|
| - | 195 | ||