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/*
* Copyright (c) 2001 Dag-Erling Smørgrav
* Copyright (c) 1993 Jan-Simon Pendry
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/exec.h>
#include <sys/lock.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_param.h>
#include <fs/pseudofs/pseudofs.h>
#include <fs/procfs/procfs.h>
/*
* Filler function for proc/pid/self
*/
int
procfs_doprocfile(PFS_FILL_ARGS)
{
char *fullpath = "unknown";
char *freepath = NULL;
vn_fullpath(td, p->p_textvp, &fullpath, &freepath);
sbuf_printf(sb, "%s", fullpath);
if (freepath)
free(freepath, M_TEMP);
return (0);
}
/*
* Filler function for proc/curproc
*/
int
procfs_docurproc(PFS_FILL_ARGS)
{
sbuf_printf(sb, "%ld", (long)td->td_proc->p_pid);
return (0);
}
/*
* Adjust mode for some nodes that need it
*/
int
procfs_attr(PFS_ATTR_ARGS)
{
PROC_LOCK_ASSERT(p, MA_OWNED);
/* XXX inefficient, split into separate functions */
if (p->p_flag & P_SUGID)
vap->va_mode = 0;
else if (strcmp(pn->pn_name, "ctl") == 0 ||
strcmp(pn->pn_name, "note") == 0 ||
strcmp(pn->pn_name, "notepg") == 0)
vap->va_mode = 0200;
else if (strcmp(pn->pn_name, "mem") == 0 ||
strcmp(pn->pn_name, "regs") == 0 ||
strcmp(pn->pn_name, "dbregs") == 0 ||
strcmp(pn->pn_name, "fpregs") == 0)
vap->va_mode = 0600;
vap->va_uid = p->p_ucred->cr_uid;
vap->va_gid = p->p_ucred->cr_gid;
return (0);
}
/*
* Visibility: some files only exist for non-system processes
* Non-static because linprocfs uses it.
*/
int
procfs_notsystem(PFS_VIS_ARGS)
{
PROC_LOCK_ASSERT(p, MA_OWNED);
return ((p->p_flag & P_SYSTEM) == 0);
}
/*
* Visibility: some files are only visible to process that can debug
* the target process.
*/
int
procfs_candebug(PFS_VIS_ARGS)
{
PROC_LOCK_ASSERT(p, MA_OWNED);
return ((p->p_flag & P_SYSTEM) == 0 && p_candebug(td, p) == 0);
}
/*
* Constructor
*/
static int
procfs_init(PFS_INIT_ARGS)
{
struct pfs_node *root;
struct pfs_node *dir;
struct pfs_node *node;
root = pi->pi_root;
pfs_create_link(root, "curproc", procfs_docurproc,
NULL, NULL, 0);
dir = pfs_create_dir(root, "pid",
procfs_attr, NULL, PFS_PROCDEP);
pfs_create_file(dir, "cmdline", procfs_doproccmdline,
NULL, NULL, PFS_RD);
pfs_create_file(dir, "ctl", procfs_doprocctl,
procfs_attr, NULL, PFS_WR);
pfs_create_file(dir, "dbregs", procfs_doprocdbregs,
procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
pfs_create_file(dir, "etype", procfs_doproctype,
NULL, NULL, PFS_RD);
pfs_create_file(dir, "fpregs", procfs_doprocfpregs,
procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
pfs_create_file(dir, "map", procfs_doprocmap,
NULL, procfs_notsystem, PFS_RD);
node = pfs_create_file(dir, "mem", procfs_doprocmem,
procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
node->pn_ioctl = procfs_ioctl;
node->pn_close = procfs_close;
pfs_create_file(dir, "note", procfs_doprocnote,
procfs_attr, procfs_candebug, PFS_WR);
pfs_create_file(dir, "notepg", procfs_doprocnote,
procfs_attr, procfs_candebug, PFS_WR);
pfs_create_file(dir, "regs", procfs_doprocregs,
procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
pfs_create_file(dir, "rlimit", procfs_doprocrlimit,
NULL, NULL, PFS_RD);
pfs_create_file(dir, "status", procfs_doprocstatus,
NULL, NULL, PFS_RD);
pfs_create_link(dir, "file", procfs_doprocfile,
NULL, procfs_notsystem, 0);
return (0);
}
/*
* Destructor
*/
static int
procfs_uninit(PFS_INIT_ARGS)
{
/* nothing to do, pseudofs will GC */
return (0);
}
PSEUDOFS(procfs, 1);
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