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/*
* linux/fs/proc/base.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* proc base directory handling functions
*/
#include <asm/uaccess.h>
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/init.h>
static struct file_operations proc_base_operations = {
NULL, /* lseek - default */
NULL, /* read - bad */
NULL, /* write - bad */
proc_readdir, /* readdir */
NULL, /* poll - default */
NULL, /* ioctl - default */
NULL, /* mmap */
NULL, /* no special open code */
NULL, /* flush */
NULL, /* no special release code */
NULL /* can't fsync */
};
/*
* proc directories can do almost nothing..
*/
static struct inode_operations proc_base_inode_operations = {
&proc_base_operations, /* default base directory file-ops */
NULL, /* create */
proc_lookup, /* lookup */
NULL, /* link */
NULL, /* unlink */
NULL, /* symlink */
NULL, /* mkdir */
NULL, /* rmdir */
NULL, /* mknod */
NULL, /* rename */
NULL, /* readlink */
NULL, /* follow_link */
NULL, /* readpage */
NULL, /* writepage */
NULL, /* bmap */
NULL, /* truncate */
NULL /* permission */
};
/*
* The fill argument is non-zero when the inode is being filled ...
* we don't need to do anything when it's being deleted.
*/
static void proc_pid_fill_inode(struct inode * inode, int fill)
{
struct task_struct *p;
int pid = inode->i_ino >> 16;
int ino = inode->i_ino & 0xffff;
read_lock(&tasklist_lock);
if (fill && (p = find_task_by_pid(pid)) != NULL) {
uid_t uid = 0;
gid_t gid = 0;
if (p->dumpable || ino == PROC_PID_INO) {
uid = p->euid;
gid = p->egid;
}
inode->i_uid = uid;
inode->i_gid = gid;
}
read_unlock(&tasklist_lock);
}
/*
* This is really a pseudo-entry, and only links
* backwards to the parent with no link from the
* root directory to this. This way we can have just
* one entry for every /proc/<pid>/ directory.
*/
struct proc_dir_entry proc_pid = {
PROC_PID_INO, 5, "<pid>",
S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0,
0, &proc_base_inode_operations,
NULL, proc_pid_fill_inode,
NULL, &proc_root, NULL
};
static struct proc_dir_entry proc_pid_status = {
PROC_PID_STATUS, 6, "status",
S_IFREG | S_IRUGO, 1, 0, 0,
0, &proc_array_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_mem = {
PROC_PID_MEM, 3, "mem",
S_IFREG | S_IRUSR | S_IWUSR, 1, 0, 0,
0, &proc_mem_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_cwd = {
PROC_PID_CWD, 3, "cwd",
S_IFLNK | S_IRWXU, 1, 0, 0,
0, &proc_link_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_root = {
PROC_PID_ROOT, 4, "root",
S_IFLNK | S_IRWXU, 1, 0, 0,
0, &proc_link_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_exe = {
PROC_PID_EXE, 3, "exe",
S_IFLNK | S_IRWXU, 1, 0, 0,
0, &proc_link_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_fd = {
PROC_PID_FD, 2, "fd",
S_IFDIR | S_IRUSR | S_IXUSR, 2, 0, 0,
0, &proc_fd_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_environ = {
PROC_PID_ENVIRON, 7, "environ",
S_IFREG | S_IRUSR, 1, 0, 0,
0, &proc_array_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_cmdline = {
PROC_PID_CMDLINE, 7, "cmdline",
S_IFREG | S_IRUGO, 1, 0, 0,
0, &proc_array_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_stat = {
PROC_PID_STAT, 4, "stat",
S_IFREG | S_IRUGO, 1, 0, 0,
0, &proc_array_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_statm = {
PROC_PID_STATM, 5, "statm",
S_IFREG | S_IRUGO, 1, 0, 0,
0, &proc_array_inode_operations,
NULL, proc_pid_fill_inode,
};
static struct proc_dir_entry proc_pid_maps = {
PROC_PID_MAPS, 4, "maps",
S_IFIFO | S_IRUGO, 1, 0, 0,
0, &proc_arraylong_inode_operations,
NULL, proc_pid_fill_inode,
};
#if CONFIG_AP1000
static struct proc_dir_entry proc_pid_ringbuf = {
PROC_PID_RINGBUF, 7, "ringbuf",
S_IFREG | S_IRUGO | S_IWUSR, 1, 0, 0,
0, &proc_ringbuf_inode_operations,
NULL, proc_pid_fill_inode,
};
#endif
#ifdef __SMP__
static struct proc_dir_entry proc_pid_cpu = {
PROC_PID_CPU, 3, "cpu",
S_IFREG | S_IRUGO, 1, 0, 0,
0, &proc_array_inode_operations,
NULL, proc_pid_fill_inode,
};
#endif
__initfunc(void proc_base_init(void))
{
#if CONFIG_AP1000
proc_register(&proc_pid, &proc_pid_ringbuf);
#endif
proc_register(&proc_pid, &proc_pid_status);
proc_register(&proc_pid, &proc_pid_mem);
proc_register(&proc_pid, &proc_pid_cwd);
proc_register(&proc_pid, &proc_pid_root);
proc_register(&proc_pid, &proc_pid_exe);
proc_register(&proc_pid, &proc_pid_fd);
proc_register(&proc_pid, &proc_pid_environ);
proc_register(&proc_pid, &proc_pid_cmdline);
proc_register(&proc_pid, &proc_pid_stat);
proc_register(&proc_pid, &proc_pid_statm);
proc_register(&proc_pid, &proc_pid_maps);
#ifdef __SMP__
proc_register(&proc_pid, &proc_pid_cpu);
#endif
};
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