procfs_osrel.c

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    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: releng/10.0/sys/fs/procfs/procfs_osrel.c 197428 2009-09-23 12:08:08Z kib $");
   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 < '' || *pp > '9')
   59                                 return (EINVAL);
   60                         ov = osrel * 10 + *pp++ - '';
   61                         if (ov < osrel)
   62                                 return (EINVAL);
   63                         osrel = ov;
   64                 }
   65                 p->p_osrel = osrel;
   66         }
   67         return (0);
   68 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/procfs/procfs_osrel.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/procfs/procfs_osrel.c