URL
https://opencores.org/ocsvn/or1k_old/or1k_old/trunk
Subversion Repositories or1k_old
[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [fs/] [isofs/] [symlink.c] - Rev 199
Go to most recent revision | Compare with Previous | Blame | View Log
/* * linux/fs/isofs/symlink.c * * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem. * * Copyright (C) 1991, 1992 Linus Torvalds * * isofs symlink handling code. This is only used with the Rock Ridge * extensions to iso9660 */ #include <linux/errno.h> #include <linux/sched.h> #include <linux/fs.h> #include <linux/iso_fs.h> #include <linux/stat.h> #include <linux/malloc.h> #include <asm/segment.h> static int isofs_readlink(struct inode *, char *, int); static int isofs_follow_link(struct inode *, struct inode *, int, int, struct inode **); /* * symlinks can't do much... */ struct inode_operations isofs_symlink_inode_operations = { NULL, /* no file-operations */ NULL, /* create */ NULL, /* lookup */ NULL, /* link */ NULL, /* unlink */ NULL, /* symlink */ NULL, /* mkdir */ NULL, /* rmdir */ NULL, /* mknod */ NULL, /* rename */ isofs_readlink, /* readlink */ isofs_follow_link, /* follow_link */ NULL, /* readpage */ NULL, /* writepage */ NULL, /* bmap */ NULL, /* truncate */ NULL /* permission */ }; static int isofs_follow_link(struct inode * dir, struct inode * inode, int flag, int mode, struct inode ** res_inode) { int error; char * pnt; if (!dir) { dir = current->fs->root; dir->i_count++; } if (!inode) { iput(dir); *res_inode = NULL; return -ENOENT; } if (!S_ISLNK(inode->i_mode)) { iput(dir); *res_inode = inode; return 0; } if ((current->link_count > 5) || !(pnt = get_rock_ridge_symlink(inode))) { iput(dir); iput(inode); *res_inode = NULL; return -ELOOP; } iput(inode); current->link_count++; error = open_namei(pnt,flag,mode,res_inode,dir); current->link_count--; kfree(pnt); return error; } static int isofs_readlink(struct inode * inode, char * buffer, int buflen) { char * pnt; int i; char c; if (!S_ISLNK(inode->i_mode)) { iput(inode); return -EINVAL; } if (buflen > 1023) buflen = 1023; pnt = get_rock_ridge_symlink(inode); iput(inode); if (!pnt) return 0; i = 0; while (i<buflen && (c = pnt[i])) { i++; put_user(c,buffer++); } kfree(pnt); return i; }
Go to most recent revision | Compare with Previous | Blame | View Log