ef0a265086
* VFS and installed MFSes must be in sync before and after this change * Use struct stat from NetBSD. It requires adding new STAT, FSTAT and LSTAT syscalls. Libc modification is both backward and forward compatible. Also new struct stat uses modern field sizes to avoid ABI incompatibility, when we update uid_t, gid_t and company. Exceptions are ino_t and off_t in old libc (though paddings added).
92 lines
2.5 KiB
C
92 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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PUBLIC 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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PUBLIC 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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PUBLIC 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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