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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | |
| 2 | #include <fs/types.h> |
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| 3 | #include <fs/errno.h> |
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| 4 | #include <fs/task.h> |
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| 5 | #include <fs/maccess.h> |
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| 6 | #include <fs/stat.h> |
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| 7 | #include <fs/fcntl.h> |
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| 8 | |||
| 9 | #include "fsconst.h" |
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| 10 | #include "file.h" |
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| 11 | #include "dentry.h" |
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| 12 | #include "inode.h" |
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| 13 | #include "fileop.h" |
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| 14 | #include "inodeop.h" |
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| 15 | #include "fs.h" |
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| 16 | |||
| 17 | #include "debug.h" |
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| 18 | |||
| 19 | int k_opendir(char *upathname) |
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| 20 | { |
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| 21 | declare_buffer(char,pathname,MAXPATHNAMELEN+1); |
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| 22 | int len; |
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| 23 | struct file *f; |
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| 24 | struct dentry *d; |
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| 25 | int res; |
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| 26 | int fd; |
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| 27 | __pid_t pid; |
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| 28 | |||
| 29 | call_to_fs(); |
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| 30 | |||
| 31 | printk4("k_opendir: START"); |
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| 32 | pid=__get_pid(); |
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| 33 | |||
| 34 | len=__verify_read_nolen((char*)upathname); |
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| 35 | if ((!len)||(len>MAXPATHNAMELEN)) return_from_fs(-EVERIFY); |
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| 36 | __copy_from_user(pathname,upathname,len+1); |
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| 37 | |||
| 38 | printk4("k_opendir: verifing memory... done"); |
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| 39 | |||
| 40 | d=find_dentry_from(cwden_ptr(pid),(char *)pathname); |
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| 41 | if (d==NULL) return_from_fs(-ENOENT); |
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| 42 | /* NB: a questo punto ci dovrebbe essere il check per le directory! */ |
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| 43 | if (!__S_ISDIR(d->d_inode->i_st.st_mode)) return_from_fs(-ENOENT); |
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| 44 | |||
| 45 | printk4("k_opendir: find dir entry... done"); |
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| 46 | |||
| 47 | /* NB: andrebbe cercato se questo file e' gia' in uso! */ |
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| 48 | f=get_file(NULL); |
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| 49 | if (f==NULL) { |
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| 50 | unlock_dentry(d); |
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| 51 | return_from_fs(-ENFILE); |
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| 52 | } |
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| 53 | |||
| 54 | printk4("k_open: getting system file entry... done"); |
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| 55 | |||
| 56 | f->f_dentry=d; |
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| 57 | f->f_op=d->d_inode->i_op->default_file_ops; |
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| 58 | f->f_pos=0; |
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| 59 | f->f_flag_isdir=1; |
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| 60 | |||
| 61 | fd=get_fd(pid,f); |
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| 62 | if (fd==-1) { |
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| 63 | free_file(f); |
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| 64 | unlock_dentry(d); |
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| 65 | return_from_fs(-EMFILE); |
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| 66 | } |
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| 67 | if ((void*)fd==NULL) { |
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| 68 | /* Well, we can't return a value that can be confused with NULL :-( */ |
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| 69 | int newfd; |
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| 70 | newfd=get_fd(pid,f); |
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| 71 | if (newfd==-1) { |
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| 72 | free_fd(pid,fd); |
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| 73 | free_file(f); |
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| 74 | unlock_dentry(d); |
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| 75 | return_from_fs(-EMFILE); |
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| 76 | } |
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| 77 | free_fd(pid,fd); |
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| 78 | fd=newfd; |
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| 79 | } |
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| 80 | |||
| 81 | printk4("k_open: getting file descriptor... done"); |
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| 82 | |||
| 83 | res=f->f_op->open(f->f_dentry->d_inode,f); |
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| 84 | if (res!=0) { |
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| 85 | free_fd(pid,fd); |
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| 86 | free_file(f); |
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| 87 | unlock_dentry(d); |
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| 88 | return_from_fs(res); |
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| 89 | } |
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| 90 | |||
| 91 | printk4("k_open: called proper filesystem open... done"); |
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| 92 | |||
| 93 | printk4("k_open: END"); |
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| 94 | return_from_fs(fd); |
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| 95 | } |