123 lines
2.2 KiB
C
123 lines
2.2 KiB
C
/* VTreeFS - stadir.c - file and file system status management */
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#include "inc.h"
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/*
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* Retrieve file status.
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*/
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int
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fs_stat(ino_t ino_nr, struct stat * buf)
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{
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char path[PATH_MAX];
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time_t cur_time;
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struct inode *node;
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int r;
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if ((node = find_inode(ino_nr)) == NULL)
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return EINVAL;
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/* Fill in the basic info. */
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buf->st_mode = node->i_stat.mode;
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buf->st_nlink = !is_inode_deleted(node);
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buf->st_uid = node->i_stat.uid;
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buf->st_gid = node->i_stat.gid;
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buf->st_rdev = (dev_t) node->i_stat.dev;
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buf->st_size = node->i_stat.size;
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/* If it is a symbolic link, return the size of the link target. */
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if (S_ISLNK(node->i_stat.mode) && vtreefs_hooks->rdlink_hook != NULL) {
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r = vtreefs_hooks->rdlink_hook(node, path, sizeof(path),
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get_inode_cbdata(node));
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if (r == OK)
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buf->st_size = strlen(path);
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}
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/* Take the current time as file time for all files. */
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cur_time = clock_time(NULL);
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buf->st_atime = cur_time;
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buf->st_mtime = cur_time;
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buf->st_ctime = cur_time;
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return OK;
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}
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/*
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* Change file mode.
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*/
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int
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fs_chmod(ino_t ino_nr, mode_t * mode)
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{
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struct inode *node;
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struct inode_stat istat;
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int r;
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if ((node = find_inode(ino_nr)) == NULL)
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return EINVAL;
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if (vtreefs_hooks->chstat_hook == NULL)
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return ENOSYS;
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get_inode_stat(node, &istat);
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istat.mode = (istat.mode & ~ALL_MODES) | (*mode & ALL_MODES);
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r = vtreefs_hooks->chstat_hook(node, &istat, get_inode_cbdata(node));
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if (r != OK)
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return r;
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get_inode_stat(node, &istat);
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*mode = istat.mode;
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return OK;
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}
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/*
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* Change file ownership.
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*/
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int
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fs_chown(ino_t ino_nr, uid_t uid, gid_t gid, mode_t * mode)
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{
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struct inode *node;
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struct inode_stat istat;
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int r;
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if ((node = find_inode(ino_nr)) == NULL)
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return EINVAL;
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if (vtreefs_hooks->chstat_hook == NULL)
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return ENOSYS;
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get_inode_stat(node, &istat);
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istat.uid = uid;
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istat.gid = gid;
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istat.mode &= ~(S_ISUID | S_ISGID);
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r = vtreefs_hooks->chstat_hook(node, &istat, get_inode_cbdata(node));
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if (r != OK)
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return r;
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get_inode_stat(node, &istat);
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*mode = istat.mode;
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return OK;
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}
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/*
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* Retrieve file system statistics.
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*/
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int
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fs_statvfs(struct statvfs * buf)
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{
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buf->f_flag = ST_NOTRUNC;
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buf->f_namemax = NAME_MAX;
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return OK;
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}
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