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199 |
simons |
/*
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* linux/fs/proc/base.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* proc base directory handling functions
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*/
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/*
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* uClinux revisions for NO_MM
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* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>,
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* The Silver Hammer Group, Ltd.
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*/
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#include <asm/segment.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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static struct file_operations proc_base_operations = {
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NULL, /* lseek - default */
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NULL, /* read - bad */
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NULL, /* write - bad */
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proc_readdir, /* readdir */
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NULL, /* select - default */
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NULL, /* ioctl - default */
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NULL, /* mmap */
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NULL, /* no special open code */
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NULL, /* no special release code */
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NULL /* can't fsync */
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};
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/*
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* proc directories can do almost nothing..
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*/
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static struct inode_operations proc_base_inode_operations = {
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&proc_base_operations, /* default base directory file-ops */
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NULL, /* create */
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proc_lookup, /* lookup */
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NULL, /* link */
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NULL, /* unlink */
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NULL, /* symlink */
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NULL, /* mkdir */
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NULL, /* rmdir */
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NULL, /* mknod */
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NULL, /* rename */
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NULL, /* readlink */
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NULL, /* follow_link */
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NULL, /* readpage */
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NULL, /* writepage */
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NULL, /* bmap */
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NULL, /* truncate */
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NULL /* permission */
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};
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static void proc_pid_fill_inode(struct inode * inode)
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{
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struct task_struct * p;
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int pid = inode->i_ino >> 16;
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int ino = inode->i_ino & 0xffff;
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for_each_task(p) {
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if (p->pid == pid) {
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if (p->dumpable || ino == PROC_PID_INO) {
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inode->i_uid = p->euid;
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inode->i_gid = p->gid;
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}
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return;
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}
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}
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}
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/*
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* This is really a pseudo-entry, and only links
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* backwards to the parent with no link from the
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* root directory to this. This way we can have just
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* one entry for every /proc/<pid>/ directory.
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*/
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struct proc_dir_entry proc_pid = {
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PROC_PID_INO, 5, "<pid>",
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S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0,
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0, &proc_base_inode_operations,
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NULL, proc_pid_fill_inode,
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NULL, &proc_root, NULL
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};
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struct proc_dir_entry pde_status = {
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PROC_PID_STATUS, 6, "status",
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S_IFREG | S_IRUGO, 1, 0, 0,
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0, &proc_array_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_mem = {
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PROC_PID_MEM, 3, "mem",
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S_IFREG | S_IRUSR | S_IWUSR, 1, 0, 0,
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0, &proc_mem_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_cwd = {
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PROC_PID_CWD, 3, "cwd",
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S_IFLNK | S_IRWXU, 1, 0, 0,
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0, &proc_link_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_root = {
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PROC_PID_ROOT, 4, "root",
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S_IFLNK | S_IRWXU, 1, 0, 0,
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0, &proc_link_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_exe = {
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PROC_PID_EXE, 3, "exe",
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S_IFLNK | S_IRWXU, 1, 0, 0,
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0, &proc_link_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_fd = {
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PROC_PID_FD, 2, "fd",
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S_IFDIR | S_IRUSR | S_IXUSR, 1, 0, 0,
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0, &proc_fd_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_environ = {
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PROC_PID_ENVIRON, 7, "environ",
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S_IFREG | S_IRUSR, 1, 0, 0,
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0, &proc_array_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_pidcmdline = {
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PROC_PID_CMDLINE, 7, "cmdline",
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S_IFREG | S_IRUGO, 1, 0, 0,
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0, &proc_array_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_pidstat = {
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PROC_PID_STAT, 4, "stat",
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S_IFREG | S_IRUGO, 1, 0, 0,
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0, &proc_array_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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#ifndef NO_MM
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struct proc_dir_entry pde_statm = {
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PROC_PID_STATM, 5, "statm",
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S_IFREG | S_IRUGO, 1, 0, 0,
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0, &proc_array_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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struct proc_dir_entry pde_maps = {
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PROC_PID_MAPS, 4, "maps",
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S_IFIFO | S_IRUGO, 1, 0, 0,
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0, &proc_arraylong_inode_operations,
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NULL, proc_pid_fill_inode,
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};
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#endif /* !NO_MM */
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void proc_base_init(void)
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{
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proc_register(&proc_pid, &pde_status);
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proc_register(&proc_pid, &pde_mem);
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proc_register(&proc_pid, &pde_cwd);
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proc_register(&proc_pid, &pde_root);
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proc_register(&proc_pid, &pde_exe);
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proc_register(&proc_pid, &pde_fd);
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proc_register(&proc_pid, &pde_environ);
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proc_register(&proc_pid, &pde_pidcmdline);
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proc_register(&proc_pid, &pde_pidstat);
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#ifndef NO_MM
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proc_register(&proc_pid, &pde_statm);
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proc_register(&proc_pid, &pde_maps);
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#endif /* !NO_MM */
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};
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