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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* * linux/fs/proc/base.c * * Copyright (C) 1991, 1992 Linus Torvalds * * proc base directory handling functions */ #include <asm/segment.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/proc_fs.h> #include <linux/stat.h> static struct file_operations proc_base_operations = { NULL, /* lseek - default */ NULL, /* read - bad */ NULL, /* write - bad */ proc_readdir, /* readdir */ NULL, /* select - default */ NULL, /* ioctl - default */ NULL, /* mmap */ NULL, /* no special open code */ 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 */ }; static void proc_pid_fill_inode(struct inode * inode) { struct task_struct * p; int pid = inode->i_ino >> 16; int ino = inode->i_ino & 0xffff; for_each_task(p) { if (p->pid == pid) { if (p->dumpable || ino == PROC_PID_INO) { inode->i_uid = p->euid; inode->i_gid = p->gid; } return; } } } /* * 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 }; void proc_base_init(void) { proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_STATUS, 6, "status", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_array_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_MEM, 3, "mem", S_IFREG | S_IRUSR | S_IWUSR, 1, 0, 0, 0, &proc_mem_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_CWD, 3, "cwd", S_IFLNK | S_IRWXU, 1, 0, 0, 0, &proc_link_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_ROOT, 4, "root", S_IFLNK | S_IRWXU, 1, 0, 0, 0, &proc_link_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_EXE, 3, "exe", S_IFLNK | S_IRWXU, 1, 0, 0, 0, &proc_link_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_FD, 2, "fd", S_IFDIR | S_IRUSR | S_IXUSR, 1, 0, 0, 0, &proc_fd_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_ENVIRON, 7, "environ", S_IFREG | S_IRUSR, 1, 0, 0, 0, &proc_array_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_CMDLINE, 7, "cmdline", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_array_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_STAT, 4, "stat", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_array_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_STATM, 5, "statm", S_IFREG | S_IRUGO, 1, 0, 0, 0, &proc_array_inode_operations, NULL, proc_pid_fill_inode, }); proc_register(&proc_pid, &(struct proc_dir_entry) { PROC_PID_MAPS, 4, "maps", S_IFIFO | S_IRUGO, 1, 0, 0, 0, &proc_arraylong_inode_operations, NULL, proc_pid_fill_inode, }); }; |