/* Return information about the filesystem on which FD resides. */ int fstatfs64 (int fd, struct statfs64 *buf) { struct statfs buf32; if (__libc_fstatfs (fd, &buf32) < 0) return -1; buf->f_type = buf32.f_type; buf->f_bsize = buf32.f_bsize; buf->f_blocks = buf32.f_blocks; buf->f_bfree = buf32.f_bfree; buf->f_bavail = buf32.f_bavail; buf->f_files = buf32.f_files; buf->f_ffree = buf32.f_ffree; buf->f_fsid = buf32.f_fsid; buf->f_namelen = buf32.f_namelen; memcpy (buf->f_spare, buf32.f_spare, sizeof (buf32.f_spare)); return 0; }
/* Get file-specific information about descriptor FD. */ long int fpathconf(int fd, int name) { if (fd < 0) { __set_errno (EBADF); return -1; } if (name == _PC_LINK_MAX) { /* Cut some corners */ #if 0 struct statfs fsbuf; /* Determine the filesystem type. */ if (__libc_fstatfs (fd, &fsbuf) < 0) { if (errno == ENOSYS) /* not possible, return the default value. */ return LINUX_LINK_MAX; /* Some error occured. */ return -1; } switch (fsbuf.f_type) { case EXT2_SUPER_MAGIC: return EXT2_LINK_MAX; case MINIX_SUPER_MAGIC: case MINIX_SUPER_MAGIC2: return MINIX_LINK_MAX; case MINIX2_SUPER_MAGIC: case MINIX2_SUPER_MAGIC2: return MINIX2_LINK_MAX; case XENIX_SUPER_MAGIC: return XENIX_LINK_MAX; case SYSV4_SUPER_MAGIC: case SYSV2_SUPER_MAGIC: return SYSV_LINK_MAX; case COH_SUPER_MAGIC: return COH_LINK_MAX; case UFS_MAGIC: case UFS_CIGAM: return UFS_LINK_MAX; case REISERFS_SUPER_MAGIC: return REISERFS_LINK_MAX; default: return LINUX_LINK_MAX; } #else return LINUX_LINK_MAX; #endif } switch (name) { default: __set_errno (EINVAL); return -1; case _PC_MAX_CANON: #ifdef MAX_CANON return MAX_CANON; #else return -1; #endif case _PC_MAX_INPUT: #ifdef MAX_INPUT return MAX_INPUT; #else return -1; #endif case _PC_NAME_MAX: #ifdef NAME_MAX { struct statfs buf; int save_errno = errno; if (__libc_fstatfs (fd, &buf) < 0) { if (errno == ENOSYS) { errno = save_errno; return NAME_MAX; } return -1; } else { #ifdef _STATFS_F_NAMELEN return buf.f_namelen; #else # ifdef _STATFS_F_NAME_MAX return buf.f_name_max; # else return NAME_MAX; # endif #endif } } #else return -1; #endif case _PC_PATH_MAX: #ifdef PATH_MAX return PATH_MAX; #else return -1; #endif case _PC_PIPE_BUF: #ifdef PIPE_BUF return PIPE_BUF; #else return -1; #endif case _PC_CHOWN_RESTRICTED: #ifdef _POSIX_CHOWN_RESTRICTED return _POSIX_CHOWN_RESTRICTED; #else return -1; #endif case _PC_NO_TRUNC: #ifdef _POSIX_NO_TRUNC return _POSIX_NO_TRUNC; #else return -1; #endif case _PC_VDISABLE: #ifdef _POSIX_VDISABLE return _POSIX_VDISABLE; #else return -1; #endif case _PC_SYNC_IO: #ifdef _POSIX_SYNC_IO return _POSIX_SYNC_IO; #else return -1; #endif case _PC_ASYNC_IO: #if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAS_LFS__ { /* AIO is only allowed on regular files and block devices. */ struct stat st; if (fstat (fd, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode))) return -1; else return 1; } #else return -1; #endif case _PC_PRIO_IO: #ifdef _POSIX_PRIO_IO return _POSIX_PRIO_IO; #else return -1; #endif case _PC_SOCK_MAXBUF: #ifdef SOCK_MAXBUF return SOCK_MAXBUF; #else return -1; #endif case _PC_FILESIZEBITS: #ifdef FILESIZEBITS return FILESIZEBITS; #else /* We let platforms with larger file sizes overwrite this value. */ return 32; #endif /* Be lazy -- skip these */ case _PC_REC_INCR_XFER_SIZE: case _PC_REC_MAX_XFER_SIZE: case _PC_REC_MIN_XFER_SIZE: case _PC_REC_XFER_ALIGN: case _PC_ALLOC_SIZE_MIN: case _PC_SYMLINK_MAX: return -1; } }