91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* VTreeFS - stadir.c - by Alen Stojanov and David van Moolenbroek */
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#include "inc.h"
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#include <time.h>
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#include <sys/statfs.h>
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#include <sys/statvfs.h>
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#include <string.h>
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/*===========================================================================*
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* fs_stat *
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*===========================================================================*/
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int fs_stat(void)
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{
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/* Retrieve file status.
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*/
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char path[PATH_MAX];
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struct stat statbuf;
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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(fs_m_in.REQ_INODE_NR)) == NULL)
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return EINVAL;
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memset(&statbuf, 0, sizeof(struct stat));
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/* Fill in the basic info. */
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statbuf.st_dev = fs_dev;
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statbuf.st_ino = get_inode_number(node);
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statbuf.st_mode = node->i_stat.mode;
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statbuf.st_nlink = !is_inode_deleted(node);
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statbuf.st_uid = node->i_stat.uid;
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statbuf.st_gid = node->i_stat.gid;
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statbuf.st_rdev = (dev_t) node->i_stat.dev;
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statbuf.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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statbuf.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 = time(NULL);
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statbuf.st_atime = cur_time;
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statbuf.st_mtime = cur_time;
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statbuf.st_ctime = cur_time;
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/* Copy the struct to user space. */
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return sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0,
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(vir_bytes) &statbuf, (phys_bytes) sizeof(statbuf), D);
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}
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/*===========================================================================*
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* fs_fstatfs *
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*===========================================================================*/
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int fs_fstatfs(void)
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{
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/* Retrieve file system statistics.
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*/
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struct statfs statfs;
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memset(&statfs, 0, sizeof(statfs));
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/* Copy the struct to user space. */
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return sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0,
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(vir_bytes) &statfs, (phys_bytes) sizeof(statfs), D);
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}
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/*===========================================================================*
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* fs_fstatfs *
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*===========================================================================*/
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int fs_statvfs(void)
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{
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/* Retrieve file system statistics.
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*/
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struct statvfs statvfs;
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memset(&statvfs, 0, sizeof(statvfs));
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statvfs.f_fsid = fs_dev;
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statvfs.f_flag = ST_RDONLY | ST_NOTRUNC;
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statvfs.f_namemax = PNAME_MAX;
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return sys_safecopyto(fs_m_in.m_source, fs_m_in.REQ_GRANT, 0,
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(vir_bytes) &statvfs, sizeof(statvfs), D);
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}
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