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
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33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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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>
65 * Filler function for proc/pid/self
68 procfs_doprocfile(PFS_FILL_ARGS)
70 char *fullpath = "unknown";
71 char *freepath = NULL;
73 vn_lock(p->p_textvp, LK_EXCLUSIVE | LK_RETRY, td);
74 vn_fullpath(td, p->p_textvp, &fullpath, &freepath);
75 VOP_UNLOCK(p->p_textvp, 0, td);
76 sbuf_printf(sb, "%s", fullpath);
78 free(freepath, M_TEMP);
83 * Filler function for proc/curproc
86 procfs_docurproc(PFS_FILL_ARGS)
88 sbuf_printf(sb, "%ld", (long)td->td_proc->p_pid);
93 * Adjust mode for some nodes that need it
96 procfs_attr(PFS_ATTR_ARGS)
98 PROC_LOCK_ASSERT(p, MA_OWNED);
100 /* XXX inefficient, split into separate functions */
101 if (strcmp(pn->pn_name, "ctl") == 0 ||
102 strcmp(pn->pn_name, "note") == 0 ||
103 strcmp(pn->pn_name, "notepg") == 0)
105 else if (strcmp(pn->pn_name, "mem") == 0 ||
106 strcmp(pn->pn_name, "regs") == 0 ||
107 strcmp(pn->pn_name, "dbregs") == 0 ||
108 strcmp(pn->pn_name, "fpregs") == 0)
111 if ((p->p_flag & P_SUGID) && pn->pn_type != pfstype_procdir)
114 vap->va_uid = p->p_ucred->cr_uid;
115 vap->va_gid = p->p_ucred->cr_gid;
121 * Visibility: some files only exist for non-system processes
122 * Non-static because linprocfs uses it.
125 procfs_notsystem(PFS_VIS_ARGS)
127 PROC_LOCK_ASSERT(p, MA_OWNED);
128 return ((p->p_flag & P_SYSTEM) == 0);
132 * Visibility: some files are only visible to process that can debug
133 * the target process.
136 procfs_candebug(PFS_VIS_ARGS)
138 PROC_LOCK_ASSERT(p, MA_OWNED);
139 return ((p->p_flag & P_SYSTEM) == 0 && p_candebug(td, p) == 0);
146 procfs_init(PFS_INIT_ARGS)
148 struct pfs_node *root;
149 struct pfs_node *dir;
150 struct pfs_node *node;
154 pfs_create_link(root, "curproc", procfs_docurproc,
157 dir = pfs_create_dir(root, "pid",
158 procfs_attr, NULL, PFS_PROCDEP);
159 pfs_create_file(dir, "cmdline", procfs_doproccmdline,
161 pfs_create_file(dir, "ctl", procfs_doprocctl,
162 procfs_attr, NULL, PFS_WR);
163 pfs_create_file(dir, "dbregs", procfs_doprocdbregs,
164 procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
165 pfs_create_file(dir, "etype", procfs_doproctype,
167 pfs_create_file(dir, "fpregs", procfs_doprocfpregs,
168 procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
169 pfs_create_file(dir, "map", procfs_doprocmap,
170 NULL, procfs_notsystem, PFS_RD);
171 node = pfs_create_file(dir, "mem", procfs_doprocmem,
172 procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
173 node->pn_ioctl = procfs_ioctl;
174 node->pn_close = procfs_close;
175 pfs_create_file(dir, "note", procfs_doprocnote,
176 procfs_attr, procfs_candebug, PFS_WR);
177 pfs_create_file(dir, "notepg", procfs_doprocnote,
178 procfs_attr, procfs_candebug, PFS_WR);
179 pfs_create_file(dir, "regs", procfs_doprocregs,
180 procfs_attr, procfs_candebug, PFS_RDWR|PFS_RAW);
181 pfs_create_file(dir, "rlimit", procfs_doprocrlimit,
183 pfs_create_file(dir, "status", procfs_doprocstatus,
186 pfs_create_link(dir, "file", procfs_doprocfile,
187 NULL, procfs_notsystem, 0);
196 procfs_uninit(PFS_INIT_ARGS)
198 /* nothing to do, pseudofs will GC */