1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2009 Konstantin Belousov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/proc.h> 34 #include <sys/sbuf.h> 35 #include <sys/uio.h> 36 37 #include <fs/pseudofs/pseudofs.h> 38 #include <fs/procfs/procfs.h> 39 40 int 41 procfs_doosrel(PFS_FILL_ARGS) 42 { 43 const char *pp; 44 int ov, osrel, i; 45 46 if (uio == NULL) 47 return (EOPNOTSUPP); 48 if (uio->uio_rw == UIO_READ) { 49 sbuf_printf(sb, "%d\n", p->p_osrel); 50 } else { 51 sbuf_trim(sb); 52 sbuf_finish(sb); 53 pp = sbuf_data(sb); 54 osrel = 0; 55 i = sbuf_len(sb); 56 while (i--) { 57 if (*pp < '0' || *pp > '9') 58 return (EINVAL); 59 ov = osrel * 10 + *pp++ - '0'; 60 if (ov < osrel) 61 return (EINVAL); 62 osrel = ov; 63 } 64 p->p_osrel = osrel; 65 } 66 return (0); 67 } 68