2 * Copyright (c) 2001 Dag-Erling Smørgrav
3 * Copyright (c) 1993 Jan-Simon Pendry
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)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>
63 #include <sys/filedesc.h>
67 * Filler function for proc/pid/cwd
68 * Copied verbatim from src/sys/compat/linprocfs/linprocfs.c,v 1.119
71 procfs_doproccwd(PFS_FILL_ARGS)
73 char *fullpath = "unknown";
74 char *freepath = NULL;
76 vn_fullpath(td, p->p_fd->fd_cdir, &fullpath, &freepath);
77 sbuf_printf(sb, "%s", fullpath);
79 free(freepath, M_TEMP);
84 * Filler function for proc/pid/root
85 * Copied verbatim from src/sys/compat/linprocfs/linprocfs.c,v 1.119
88 procfs_doprocroot(PFS_FILL_ARGS)
91 char *fullpath = "unknown";
92 char *freepath = NULL;
94 rvp = jailed(p->p_ucred) ? p->p_fd->fd_jdir : p->p_fd->fd_rdir;
95 vn_fullpath(td, rvp, &fullpath, &freepath);
96 sbuf_printf(sb, "%s", fullpath);
98 free(freepath, M_TEMP);
103 * Filler function for proc/pid/self
106 procfs_doprocfile(PFS_FILL_ARGS)
108 char *fullpath = "unknown";
109 char *freepath = NULL;
110 struct vnode *textvp;
113 textvp = p->p_textvp;
116 vn_fullpath(td, textvp, &fullpath, &freepath);
118 sbuf_printf(sb, "%s", fullpath);
120 free(freepath, M_TEMP);
125 * Filler function for proc/curproc
128 procfs_docurproc(PFS_FILL_ARGS)
130 sbuf_printf(sb, "%ld", (long)td->td_proc->p_pid);
135 * Adjust mode for some nodes that need it
138 procfs_attr(PFS_ATTR_ARGS)
141 /* XXX inefficient, split into separate functions */
142 if (strcmp(pn->pn_name, "ctl") == 0 ||
143 strcmp(pn->pn_name, "note") == 0 ||
144 strcmp(pn->pn_name, "notepg") == 0)
146 else if (strcmp(pn->pn_name, "mem") == 0 ||
147 strcmp(pn->pn_name, "regs") == 0 ||
148 strcmp(pn->pn_name, "dbregs") == 0 ||
149 strcmp(pn->pn_name, "fpregs") == 0 ||
150 strcmp(pn->pn_name, "osrel") == 0)
154 PROC_LOCK_ASSERT(p, MA_OWNED);
156 if ((p->p_flag & P_SUGID) && pn->pn_type != pfstype_procdir)
164 * Visibility: some files only exist for non-system processes
165 * Non-static because linprocfs uses it.
168 procfs_notsystem(PFS_VIS_ARGS)
170 PROC_LOCK_ASSERT(p, MA_OWNED);
171 return ((p->p_flag & P_SYSTEM) == 0);
175 * Visibility: some files are only visible to process that can debug
176 * the target process.
179 procfs_candebug(PFS_VIS_ARGS)
181 PROC_LOCK_ASSERT(p, MA_OWNED);
182 return ((p->p_flag & P_SYSTEM) == 0 && p_candebug(td, p) == 0);
189 procfs_init(PFS_INIT_ARGS)
191 struct pfs_node *root;
192 struct pfs_node *dir;
193 struct pfs_node *node;
197 pfs_create_link(root, "curproc", procfs_docurproc,
198 NULL, NULL, NULL, 0);
199 pfs_create_link(root, "self", procfs_docurproc,
200 NULL, NULL, NULL, 0);
202 dir = pfs_create_dir(root, "pid",
203 procfs_attr, NULL, NULL, PFS_PROCDEP);
204 pfs_create_file(dir, "cmdline", procfs_doproccmdline,
205 NULL, NULL, NULL, PFS_RD);
206 pfs_create_file(dir, "ctl", procfs_doprocctl,
207 procfs_attr, NULL, NULL, PFS_WR);
208 pfs_create_file(dir, "dbregs", procfs_doprocdbregs,
209 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
210 pfs_create_file(dir, "etype", procfs_doproctype,
211 NULL, NULL, NULL, PFS_RD);
212 pfs_create_file(dir, "fpregs", procfs_doprocfpregs,
213 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
214 pfs_create_file(dir, "map", procfs_doprocmap,
215 NULL, procfs_notsystem, NULL, PFS_RD);
216 node = pfs_create_file(dir, "mem", procfs_doprocmem,
217 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
218 node->pn_ioctl = procfs_ioctl;
219 node->pn_close = procfs_close;
220 pfs_create_file(dir, "note", procfs_doprocnote,
221 procfs_attr, procfs_candebug, NULL, PFS_WR);
222 pfs_create_file(dir, "notepg", procfs_doprocnote,
223 procfs_attr, procfs_candebug, NULL, PFS_WR);
224 pfs_create_file(dir, "regs", procfs_doprocregs,
225 procfs_attr, procfs_candebug, NULL, PFS_RDWR|PFS_RAW);
226 pfs_create_file(dir, "rlimit", procfs_doprocrlimit,
227 NULL, NULL, NULL, PFS_RD);
228 pfs_create_file(dir, "status", procfs_doprocstatus,
229 NULL, NULL, NULL, PFS_RD);
230 pfs_create_file(dir, "osrel", procfs_doosrel,
231 procfs_attr, procfs_candebug, NULL, PFS_RDWR);
233 pfs_create_link(dir, "file", procfs_doprocfile,
234 NULL, procfs_notsystem, NULL, 0);
235 pfs_create_link(dir, "exe", procfs_doprocfile,
236 NULL, procfs_notsystem, NULL, 0);
238 pfs_create_link(dir, "cwd", &procfs_doproccwd,
239 NULL, NULL, NULL, 0);
240 pfs_create_link(dir, "root", &procfs_doprocroot,
241 NULL, NULL, NULL, 0);
250 procfs_uninit(PFS_INIT_ARGS)
252 /* nothing to do, pseudofs will GC */