98 lines
1.8 KiB
C
98 lines
1.8 KiB
C
/*
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* linux/fs/stat.c
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*
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* (C) 1991 Linus Torvalds
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*/
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#include <errno.h>
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#include <sys/stat.h>
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <asm/segment.h>
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static void cp_stat(struct m_inode * inode, struct stat * statbuf)
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{
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struct stat tmp;
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int i;
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verify_area(statbuf,sizeof (struct stat));
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tmp.st_dev = inode->i_dev;
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tmp.st_ino = inode->i_num;
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tmp.st_mode = inode->i_mode;
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tmp.st_nlink = inode->i_nlinks;
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tmp.st_uid = inode->i_uid;
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tmp.st_gid = inode->i_gid;
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tmp.st_rdev = inode->i_zone[0];
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tmp.st_size = inode->i_size;
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tmp.st_atime = inode->i_atime;
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tmp.st_mtime = inode->i_mtime;
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tmp.st_ctime = inode->i_ctime;
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for (i=0 ; i<sizeof (tmp) ; i++)
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put_fs_byte(((char *) &tmp)[i],i + (char *) statbuf);
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}
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int sys_stat(char * filename, struct stat * statbuf)
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{
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struct m_inode * inode;
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if (!(inode=namei(filename)))
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return -ENOENT;
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cp_stat(inode,statbuf);
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iput(inode);
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return 0;
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}
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int sys_lstat(char * filename, struct stat * statbuf)
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{
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struct m_inode * inode;
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if (!(inode = lnamei(filename)))
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return -ENOENT;
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cp_stat(inode,statbuf);
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iput(inode);
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return 0;
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}
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int sys_fstat(unsigned int fd, struct stat * statbuf)
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{
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struct file * f;
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struct m_inode * inode;
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if (fd >= NR_OPEN || !(f=current->filp[fd]) || !(inode=f->f_inode))
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return -EBADF;
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cp_stat(inode,statbuf);
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return 0;
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}
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int sys_readlink(const char * path, char * buf, int bufsiz)
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{
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struct m_inode * inode;
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struct buffer_head * bh;
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int i;
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char c;
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if (bufsiz <= 0)
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return -EBADF;
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if (bufsiz > 1023)
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bufsiz = 1023;
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verify_area(buf,bufsiz);
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if (!(inode = lnamei(path)))
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return -ENOENT;
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if (inode->i_zone[0])
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bh = bread(inode->i_dev, inode->i_zone[0]);
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else
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bh = NULL;
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iput(inode);
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if (!bh)
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return 0;
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i = 0;
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while (i<bufsiz && (c = bh->b_data[i])) {
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i++;
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put_fs_byte(c,buf++);
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}
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brelse(bh);
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return i;
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}
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