1 /*- 2 * Copyright (c) 2009 Konstantin Belousov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/proc.h> 35 #include <sys/sbuf.h> 36 #include <sys/uio.h> 37 38 #include <fs/pseudofs/pseudofs.h> 39 #include <fs/procfs/procfs.h> 40 41 int 42 procfs_doosrel(PFS_FILL_ARGS) 43 { 44 const char *pp; 45 int ov, osrel, i; 46 47 if (uio == NULL) 48 return (EOPNOTSUPP); 49 if (uio->uio_rw == UIO_READ) { 50 sbuf_printf(sb, "%d\n", p->p_osrel); 51 } else { 52 sbuf_trim(sb); 53 sbuf_finish(sb); 54 pp = sbuf_data(sb); 55 osrel = 0; 56 i = sbuf_len(sb); 57 while (i--) { 58 if (*pp < '0' || *pp > '9') 59 return (EINVAL); 60 ov = osrel * 10 + *pp++ - '0'; 61 if (ov < osrel) 62 return (EINVAL); 63 osrel = ov; 64 } 65 p->p_osrel = osrel; 66 } 67 return (0); 68 } 69