2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 2001 Dag-Erling Smørgrav
5 * Copyright (c) 1993 Jan-Simon Pendry
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95
43 #include <sys/param.h>
44 #include <sys/queue.h>
47 #include <sys/kernel.h>
48 #include <sys/malloc.h>
49 #include <sys/mount.h>
50 #include <sys/mutex.h>
53 #include <sys/sysproto.h>
54 #include <sys/systm.h>
55 #include <sys/vnode.h>
59 #include <vm/vm_param.h>
61 #include <fs/pseudofs/pseudofs.h>
62 #include <fs/procfs/procfs.h>
65 * Filler function for proc/pid/file
68 procfs_doprocfile(PFS_FILL_ARGS)
70 char *fullpath, *freepath, *binpath;
74 binpath = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
76 error = proc_get_binpath(p, binpath, &fullpath, &freepath);
78 sbuf_cat(sb, fullpath);
79 free(binpath, M_TEMP);
80 free(freepath, M_TEMP);
85 * Filler function for proc/curproc
88 procfs_docurproc(PFS_FILL_ARGS)
90 sbuf_printf(sb, "%ld", (long)td->td_proc->p_pid);
95 procfs_attr(PFS_ATTR_ARGS, int mode) {
98 PROC_LOCK_ASSERT(p, MA_OWNED);
100 if ((p->p_flag & P_SUGID) && pn->pn_type != pfstype_procdir)
108 procfs_attr_all_rx(PFS_ATTR_ARGS)
111 return (procfs_attr(td, p, pn, vap, 0555));
115 procfs_attr_rw(PFS_ATTR_ARGS)
118 return (procfs_attr(td, p, pn, vap, 0600));
122 procfs_attr_w(PFS_ATTR_ARGS)
125 return (procfs_attr(td, p, pn, vap, 0200));
129 * Visibility: some files only exist for non-system processes
130 * Non-static because linprocfs uses it.
133 procfs_notsystem(PFS_VIS_ARGS)
135 PROC_LOCK_ASSERT(p, MA_OWNED);
136 return ((p->p_flag & P_SYSTEM) == 0);
140 * Visibility: some files are only visible to process that can debug
141 * the target process.
144 procfs_candebug(PFS_VIS_ARGS)
146 PROC_LOCK_ASSERT(p, MA_OWNED);
147 return ((p->p_flag & P_SYSTEM) == 0 && p_candebug(td, p) == 0);
154 procfs_init(PFS_INIT_ARGS)
156 struct pfs_node *root;
157 struct pfs_node *dir;
161 pfs_create_link(root, "curproc", procfs_docurproc,
162 NULL, NULL, NULL, 0);
164 dir = pfs_create_dir(root, "pid",
165 procfs_attr_all_rx, NULL, NULL, PFS_PROCDEP);
166 pfs_create_file(dir, "cmdline", procfs_doproccmdline,
167 NULL, NULL, NULL, PFS_RD);
168 pfs_create_file(dir, "dbregs", procfs_doprocdbregs,
169 procfs_attr_rw, procfs_candebug, NULL, PFS_RDWR | PFS_RAW);
170 pfs_create_file(dir, "etype", procfs_doproctype,
171 NULL, NULL, NULL, PFS_RD);
172 pfs_create_file(dir, "fpregs", procfs_doprocfpregs,
173 procfs_attr_rw, procfs_candebug, NULL, PFS_RDWR | PFS_RAW);
174 pfs_create_file(dir, "map", procfs_doprocmap,
175 NULL, procfs_notsystem, NULL, PFS_RD);
176 pfs_create_file(dir, "mem", procfs_doprocmem,
177 procfs_attr_rw, procfs_candebug, NULL, PFS_RDWR | PFS_RAW);
178 pfs_create_file(dir, "note", procfs_doprocnote,
179 procfs_attr_w, procfs_candebug, NULL, PFS_WR);
180 pfs_create_file(dir, "notepg", procfs_doprocnote,
181 procfs_attr_w, procfs_candebug, NULL, PFS_WR);
182 pfs_create_file(dir, "regs", procfs_doprocregs,
183 procfs_attr_rw, procfs_candebug, NULL, PFS_RDWR | PFS_RAW);
184 pfs_create_file(dir, "rlimit", procfs_doprocrlimit,
185 NULL, NULL, NULL, PFS_RD);
186 pfs_create_file(dir, "status", procfs_doprocstatus,
187 NULL, NULL, NULL, PFS_RD);
188 pfs_create_file(dir, "osrel", procfs_doosrel,
189 procfs_attr_rw, procfs_candebug, NULL, PFS_RDWR);
191 pfs_create_link(dir, "file", procfs_doprocfile,
192 NULL, procfs_notsystem, NULL, 0);
201 procfs_uninit(PFS_INIT_ARGS)
203 /* nothing to do, pseudofs will GC */
207 PSEUDOFS(procfs, 1, VFCF_JAIL);