/* * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) * Licensed under the GPL */ #include <unistd.h> #include <stdio.h> #include <fcntl.h> #include <dirent.h> #include <errno.h> #include <utime.h> #include <string.h> #include <sys/stat.h> #include <sys/time.h> #include <sys/vfs.h> #include "hostfs.h" #include "kern_util.h" #include "user.h" int stat_file(const char *path, unsigned long long *inode_out, int *mode_out, int *nlink_out, int *uid_out, int *gid_out, unsigned long long *size_out, struct timespec *atime_out, struct timespec *mtime_out, struct timespec *ctime_out, int *blksize_out, unsigned long long *blocks_out) { struct stat64 buf; if(lstat64(path, &buf) < 0) return(-errno); if(inode_out != NULL) *inode_out = buf.st_ino; if(mode_out != NULL) *mode_out = buf.st_mode; if(nlink_out != NULL) *nlink_out = buf.st_nlink; if(uid_out != NULL) *uid_out = buf.st_uid; if(gid_out != NULL) *gid_out = buf.st_gid; if(size_out != NULL) *size_out = buf.st_size; if(atime_out != NULL) { atime_out->tv_sec = buf.st_atime; atime_out->tv_nsec = 0; } if(mtime_out != NULL) { mtime_out->tv_sec = buf.st_mtime; mtime_out->tv_nsec = 0; } if(ctime_out != NULL) { ctime_out->tv_sec = buf.st_ctime; ctime_out->tv_nsec = 0; } if(blksize_out != NULL) *blksize_out = buf.st_blksize; if(blocks_out != NULL) *blocks_out = buf.st_blocks; return(0); } int file_type(const char *path, int *maj, int *min) { struct stat64 buf; if(lstat64(path, &buf) < 0) return(-errno); /*We cannot pass rdev as is because glibc and the kernel disagree *about its definition.*/ if(maj != NULL) *maj = major(buf.st_rdev); if(min != NULL) *min = minor(buf.st_rdev); if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR); else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK); else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV); else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV); else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO); else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK); else return(OS_TYPE_FILE); } int access_file(char *path, int r, int w, int x) { int mode = 0; if(r) mode = R_OK; if(w) mode |= W_OK; if(x) mode |= X_OK; if(access(path, mode) != 0) return(-errno); else return(0); } int open_file(char *path, int r, int w, int append) { int mode = 0, fd; if(r && !w) mode = O_RDONLY; else if(!r && w) mode = O_WRONLY; else if(r && w) mode = O_RDWR; else panic("Impossible mode in open_file"); if(append) mode |= O_APPEND; fd = open64(path, mode); if(fd < 0) return(-errno); else return(fd); } void *open_dir(char *path, int *err_out) { DIR *dir; dir = opendir(path); *err_out = errno; if(dir == NULL) return(NULL); return(dir); } char *read_dir(void *stream, unsigned long long *pos, unsigned long long *ino_out, int *len_out) { DIR *dir = stream; struct dirent *ent; seekdir(dir, *pos); ent = readdir(dir); if(ent == NULL) return(NULL); *len_out = strlen(ent->d_name); *ino_out = ent->d_ino; *pos = telldir(dir); return(ent->d_name); } int read_file(int fd, unsigned long long *offset, char *buf, int len) { int n; n = pread64(fd, buf, len, *offset); if(n < 0) return(-errno); *offset += n; return(n); } int write_file(int fd, unsigned long long *offset, const char *buf, int len) { int n; n = pwrite64(fd, buf, len, *offset); if(n < 0) return(-errno); *offset += n; return(n); } int lseek_file(int fd, long long offset, int whence) { int ret; ret = lseek64(fd, offset, whence); if(ret < 0) return(-errno); return(0); } int fsync_file(int fd, int datasync) { int ret; if (datasync) ret = fdatasync(fd); else ret = fsync(fd); if (ret < 0) return -errno; return 0; } void close_file(void *stream) { close(*((int *) stream)); } void close_dir(void *stream) { closedir(stream); } int file_create(char *name, int ur, int uw, int ux, int gr, int gw, int gx, int or, int ow, int ox) { int mode, fd; mode = 0; mode |= ur ? S_IRUSR : 0; mode |= uw ? S_IWUSR : 0; mode |= ux ? S_IXUSR : 0; mode |= gr ? S_IRGRP : 0; mode |= gw ? S_IWGRP : 0; mode |= gx ? S_IXGRP : 0; mode |= or ? S_IROTH : 0; mode |= ow ? S_IWOTH : 0; mode |= ox ? S_IXOTH : 0; fd = open64(name, O_CREAT | O_RDWR, mode); if(fd < 0) return(-errno); return(fd); } int set_attr(const char *file, struct hostfs_iattr *attrs) { struct utimbuf buf; int err, ma; if(attrs->ia_valid & HOSTFS_ATTR_MODE){ if(chmod(file, attrs->ia_mode) != 0) return(-errno); } if(attrs->ia_valid & HOSTFS_ATTR_UID){ if(chown(file, attrs->ia_uid, -1)) return(-errno); } if(attrs->ia_valid & HOSTFS_ATTR_GID){ if(chown(file, -1, attrs->ia_gid)) return(-errno); } if(attrs->ia_valid & HOSTFS_ATTR_SIZE){ if(truncate(file, attrs->ia_size)) return(-errno); } ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET; if((attrs->ia_valid & ma) == ma){ buf.actime = attrs->ia_atime.tv_sec; buf.modtime = attrs->ia_mtime.tv_sec; if(utime(file, &buf) != 0) return(-errno); } else { struct timespec ts; if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){ err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &ts, NULL, NULL, NULL); if(err != 0) return(err); buf.actime = attrs->ia_atime.tv_sec; buf.modtime = ts.tv_sec; if(utime(file, &buf) != 0) return(-errno); } if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){ err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL, &ts, NULL, NULL, NULL, NULL); if(err != 0) return(err); buf.actime = ts.tv_sec; buf.modtime = attrs->ia_mtime.tv_sec; if(utime(file, &buf) != 0) return(-errno); } } if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ; if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){ err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL, &attrs->ia_atime, &attrs->ia_mtime, NULL, NULL, NULL); if(err != 0) return(err); } return(0); } int make_symlink(const char *from, const char *to) { int err; err = symlink(to, from); if(err) return(-errno); return(0); } int unlink_file(const char *file) { int err; err = unlink(file); if(err) return(-errno); return(0); } int do_mkdir(const char *file, int mode) { int err; err = mkdir(file, mode); if(err) return(-errno); return(0); } int do_rmdir(const char *file) { int err; err = rmdir(file); if(err) return(-errno); return(0); } int do_mknod(const char *file, int mode, int dev) { int err; err = mknod(file, mode, dev); if(err) return(-errno); return(0); } int link_file(const char *to, const char *from) { int err; err = link(to, from); if(err) return(-errno); return(0); } int do_readlink(char *file, char *buf, int size) { int n; n = readlink(file, buf, size); if(n < 0) return(-errno); if(n < size) buf[n] = '\0'; return(n); } int rename_file(char *from, char *to) { int err; err = rename(from, to); if(err < 0) return(-errno); return(0); } int do_statfs(char *root, long *bsize_out, long long *blocks_out, long long *bfree_out, long long *bavail_out, long long *files_out, long long *ffree_out, void *fsid_out, int fsid_size, long *namelen_out, long *spare_out) { struct statfs64 buf; int err; err = statfs64(root, &buf); if(err < 0) return(-errno); *bsize_out = buf.f_bsize; *blocks_out = buf.f_blocks; *bfree_out = buf.f_bfree; *bavail_out = buf.f_bavail; *files_out = buf.f_files; *ffree_out = buf.f_ffree; memcpy(fsid_out, &buf.f_fsid, sizeof(buf.f_fsid) > fsid_size ? fsid_size : sizeof(buf.f_fsid)); *namelen_out = buf.f_namelen; spare_out[0] = buf.f_spare[0]; spare_out[1] = buf.f_spare[1]; spare_out[2] = buf.f_spare[2]; spare_out[3] = buf.f_spare[3]; spare_out[4] = buf.f_spare[4]; return(0); } /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-file-style: "linux" * End: */