830 lines
21 KiB
C
830 lines
21 KiB
C
/*
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* Kernel Debug Shell
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*/
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#include <system.h>
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#include <fs.h>
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#include <printf.h>
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#include <logging.h>
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#include <process.h>
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#include <version.h>
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#include <termios.h>
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#include <tokenize.h>
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#include <hashmap.h>
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#include <pci.h>
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#include <pipe.h>
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#include <elf.h>
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#include <module.h>
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#include <mod/shell.h>
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/*
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* This is basically the same as a userspace buffered/unbuffered
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* termio call. These are the same sorts of things I would use in
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* a text editor in userspace, but with the internal kernel calls
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* rather than system calls.
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*/
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static struct termios old;
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static void set_unbuffered(fs_node_t * dev) {
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ioctl_fs(dev, TCGETS, &old);
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struct termios new = old;
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new.c_lflag &= (~ICANON & ~ECHO);
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ioctl_fs(dev, TCSETSF, &new);
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}
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static void set_buffered(fs_node_t * dev) {
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ioctl_fs(dev, TCSETSF, &old);
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}
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/*
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* Quick readline implementation.
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*
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* Most of these TODOs are things I've done already in older code:
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* TODO tabcompletion would be nice
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* TODO history is also nice
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*/
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static int debug_shell_readline(fs_node_t * dev, char * linebuf, int max) {
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int read = 0;
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set_unbuffered(dev);
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while (read < max) {
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uint8_t buf[1];
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int r = read_fs(dev, 0, 1, (unsigned char *)buf);
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if (!r) {
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debug_print(WARNING, "Read nothing?");
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continue;
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}
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linebuf[read] = buf[0];
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if (buf[0] == '\n') {
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fprintf(dev, "\n");
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linebuf[read] = 0;
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break;
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} else if (buf[0] == 0x08) {
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if (read > 0) {
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fprintf(dev, "\010 \010");
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read--;
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linebuf[read] = 0;
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}
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} else if (buf[0] < ' ') {
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switch (buf[0]) {
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case 0x0C: /* ^L */
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/* Should reset display here */
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break;
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default:
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/* do nothing */
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break;
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}
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} else {
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fprintf(dev, "%c", buf[0]);
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read += r;
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}
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}
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set_buffered(dev);
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return read;
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}
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/*
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* Tasklet for running a userspace application.
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*/
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static void debug_shell_run_sh(void * data, char * name) {
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char * argv[] = {
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"/bin/sh",
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NULL
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};
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int argc = 0;
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while (argv[argc]) {
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argc++;
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}
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system(argv[0], argc, argv); /* Run shell */
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task_exit(42);
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}
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static hashmap_t * shell_commands_map = NULL;
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/*
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* Shell commands
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*/
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static int shell_create_userspace_shell(fs_node_t * tty, int argc, char * argv[]) {
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int pid = create_kernel_tasklet(debug_shell_run_sh, "[[k-sh]]", NULL);
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fprintf(tty, "Shell started with pid = %d\n", pid);
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process_t * child_task = process_from_pid(pid);
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sleep_on(child_task->wait_queue);
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return child_task->status;
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}
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static int shell_echo(fs_node_t * tty, int argc, char * argv[]) {
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for (int i = 1; i < argc; ++i) {
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fprintf(tty, "%s ", argv[i]);
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}
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fprintf(tty, "\n");
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return 0;
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}
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static int shell_help(fs_node_t * tty, int argc, char * argv[]) {
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list_t * hash_keys = hashmap_keys(shell_commands_map);
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foreach(_key, hash_keys) {
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char * key = (char *)_key->value;
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struct shell_command * c = hashmap_get(shell_commands_map, key);
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fprintf(tty, "%s - %s\n", c->name, c->description);
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}
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list_free(hash_keys);
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free(hash_keys);
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return 0;
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}
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static int shell_cd(fs_node_t * tty, int argc, char * argv[]) {
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if (argc < 2) {
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return -1;
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}
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char * newdir = argv[1];
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char * path = canonicalize_path(current_process->wd_name, newdir);
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fs_node_t * chd = kopen(path, 0);
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if (chd) {
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if ((chd->flags & FS_DIRECTORY) == 0) {
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return -1;
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}
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free(current_process->wd_name);
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current_process->wd_name = malloc(strlen(path) + 1);
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memcpy(current_process->wd_name, path, strlen(path) + 1);
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return 0;
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} else {
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return -1;
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}
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}
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static int shell_ls(fs_node_t * tty, int argc, char * argv[]) {
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/* Okay, we're going to take the working directory... */
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fs_node_t * wd = kopen(current_process->wd_name, 0);
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uint32_t index = 0;
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struct dirent * kentry = readdir_fs(wd, index);
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while (kentry) {
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fprintf(tty, "%s\n", kentry->name);
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index++;
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kentry = readdir_fs(wd, index);
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}
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close_fs(wd);
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free(wd);
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return 0;
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}
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static int shell_test_hash(fs_node_t * tty, int argc, char * argv[]) {
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fprintf(tty, "Creating a hash...\n");
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hashmap_t * map = hashmap_create(2);
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hashmap_set(map, "a", (void *)1);
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hashmap_set(map, "b", (void *)2);
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hashmap_set(map, "c", (void *)3);
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fprintf(tty, "value at a: %d\n", (int)hashmap_get(map, "a"));
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fprintf(tty, "value at b: %d\n", (int)hashmap_get(map, "b"));
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fprintf(tty, "value at c: %d\n", (int)hashmap_get(map, "c"));
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hashmap_set(map, "b", (void *)42);
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fprintf(tty, "value at a: %d\n", (int)hashmap_get(map, "a"));
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fprintf(tty, "value at b: %d\n", (int)hashmap_get(map, "b"));
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fprintf(tty, "value at c: %d\n", (int)hashmap_get(map, "c"));
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hashmap_remove(map, "a");
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fprintf(tty, "value at a: %d\n", (int)hashmap_get(map, "a"));
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fprintf(tty, "value at b: %d\n", (int)hashmap_get(map, "b"));
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fprintf(tty, "value at c: %d\n", (int)hashmap_get(map, "c"));
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fprintf(tty, "map contains a: %s\n", hashmap_has(map, "a") ? "yes" : "no");
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fprintf(tty, "map contains b: %s\n", hashmap_has(map, "b") ? "yes" : "no");
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fprintf(tty, "map contains c: %s\n", hashmap_has(map, "c") ? "yes" : "no");
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list_t * hash_keys = hashmap_keys(map);
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foreach(_key, hash_keys) {
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char * key = (char *)_key->value;
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fprintf(tty, "map[%s] = %d\n", key, (int)hashmap_get(map, key));
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}
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list_free(hash_keys);
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free(hash_keys);
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hashmap_free(map);
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free(map);
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return 0;
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}
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static int shell_log(fs_node_t * tty, int argc, char * argv[]) {
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if (argc < 2) {
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fprintf(tty, "Log level is currently %d.\n", debug_level);
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fprintf(tty, "Serial logging is %s.\n", !!debug_file ? "enabled" : "disabled");
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fprintf(tty, "Usage: log [on|off] [<level>]\n");
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} else {
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if (!strcmp(argv[1], "on")) {
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debug_file = tty;
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if (argc > 2) {
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debug_level = atoi(argv[2]);
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}
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} else if (!strcmp(argv[1], "off")) {
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debug_file = NULL;
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}
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}
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return 0;
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}
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static void dumb_sort(char * str) {
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int size = strlen(str);
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for (int i = 0; i < size-1; ++i) {
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for (int j = 0; j < size-1; ++j) {
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if (str[j] > str[j+1]) {
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char t = str[j+1];
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str[j+1] = str[j];
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str[j] = t;
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}
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}
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}
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}
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static int shell_anagrams(fs_node_t * tty, int argc, char * argv[]) {
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hashmap_t * map = hashmap_create(10);
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for (int i = 1; i < argc; ++i) {
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char * c = strdup(argv[i]);
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dumb_sort(c);
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list_t * l = hashmap_get(map, c);
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if (!l) {
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l = list_create();
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hashmap_set(map, c, l);
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}
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list_insert(l, argv[i]);
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free(c);
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}
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list_t * values = hashmap_values(map);
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foreach(val, values) {
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list_t * x = (list_t *)val->value;
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fprintf(tty, "{");
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foreach(node, x) {
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fprintf(tty, "%s", (char *)node->value);
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if (node->next) {
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fprintf(tty, ", ");
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}
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}
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fprintf(tty, "}%s", (!!val->next) ? ", " : "\n");
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free(x);
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}
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list_free(values);
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free(values);
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hashmap_free(map);
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free(map);
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return 0;
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}
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static void scan_hit_list(uint32_t device, uint16_t vendorid, uint16_t deviceid, void * extra) {
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fs_node_t * tty = extra;
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fprintf(tty, "%2x:%2x.%d (%4x, %4x:%4x) %s %s\n",
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(int)pci_extract_bus(device),
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(int)pci_extract_slot(device),
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(int)pci_extract_func(device),
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(int)pci_find_type(device),
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vendorid,
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deviceid,
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pci_vendor_lookup(vendorid),
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pci_device_lookup(vendorid,deviceid));
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fprintf(tty, " BAR0: 0x%8x\n", pci_read_field(device, PCI_BAR0, 4));
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fprintf(tty, " BAR1: 0x%8x\n", pci_read_field(device, PCI_BAR1, 4));
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fprintf(tty, " BAR2: 0x%8x\n", pci_read_field(device, PCI_BAR2, 4));
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fprintf(tty, " BAR3: 0x%8x\n", pci_read_field(device, PCI_BAR3, 4));
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fprintf(tty, " BAR4: 0x%8x\n", pci_read_field(device, PCI_BAR4, 4));
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fprintf(tty, " BAR6: 0x%8x\n", pci_read_field(device, PCI_BAR5, 4));
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}
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static int shell_pci(fs_node_t * tty, int argc, char * argv[]) {
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pci_scan(&scan_hit_list, -1, tty);
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return 0;
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}
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static int shell_uid(fs_node_t * tty, int argc, char * argv[]) {
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if (argc < 2) {
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fprintf(tty, "uid=%d\n", current_process->user);
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} else {
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current_process->user = atoi(argv[1]);
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}
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return 0;
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}
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typedef struct packet {
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fs_node_t * client_port; /* client "port"... it's actually the pointer to the pipe for the client. */
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pid_t client_pid; /* the pid of the client is always include because reasons */
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size_t size; /* size of the packet */
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uint8_t data[];
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} packet_t;
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static void packet_send(fs_node_t * recver, fs_node_t * sender, size_t size, void * data) {
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size_t p_size = size + sizeof(struct packet);
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packet_t * p = malloc(p_size);
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memcpy(p->data, data, size);
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p->client_port = sender;
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p->client_pid = current_process->id;
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p->size = size;
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write_fs(recver, 0, p_size, (uint8_t *)p);
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free(p);
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}
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static void packet_recv(fs_node_t * socket, packet_t ** out) {
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packet_t tmp;
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read_fs(socket, 0, sizeof(struct packet), (uint8_t *)&tmp);
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*out = malloc(tmp.size + sizeof(struct packet));
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memcpy(*out, &tmp, sizeof(struct packet));
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read_fs(socket, 0, tmp.size, (uint8_t *)(*out)->data);
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}
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static void tasklet_client(void * data, char * name) {
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fs_node_t * server_pipe = (fs_node_t *)data;
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fs_node_t * client_pipe = make_pipe(4096);
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fs_node_t * tty = current_process->fds->entries[0];
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packet_send(server_pipe, client_pipe, strlen("Hello")+1, "Hello");
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while (1) {
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packet_t * p;
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packet_recv(client_pipe, &p);
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fprintf(tty, "Client %s Received: %s\n", name, (char *)p->data);
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if (!strcmp((char*)p->data, "PING")) {
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packet_send(server_pipe, client_pipe, strlen("PONG")+1, "PONG");
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}
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free(p);
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}
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}
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static int shell_server_running = 0;
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static fs_node_t * shell_server_node = NULL;
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static void tasklet_server(void * data, char * name) {
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fs_node_t * tty = current_process->fds->entries[0];
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fs_node_t * socket = make_pipe(4096);
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shell_server_node = socket;
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create_kernel_tasklet(tasklet_client, "ktty-client-1", socket);
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create_kernel_tasklet(tasklet_client, "ktty-client-2", socket);
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create_kernel_tasklet(tasklet_client, "ktty-client-3", socket);
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fprintf(tty, "Going to perform a quick demo...\n");
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int i = 0;
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fs_node_t * outputs[3];
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while (i < 3) {
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packet_t * p;
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packet_recv(socket, &p);
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fprintf(tty, "Server received %s from %d:%d\n", (char*)p->data, p->client_pid, p->client_port);
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packet_send(p->client_port, socket, strlen("Welcome!")+1, "Welcome!");
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outputs[i] = p->client_port;
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free(p);
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i++;
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}
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fprintf(tty, "Okay, that's everyone, time to send some responses.\n");
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i = 0;
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while (i < 3) {
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packet_send(outputs[i], socket, strlen("PING")+1, "PING");
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i++;
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}
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i = 0;
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while (i < 3) {
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packet_t * p;
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packet_recv(socket, &p);
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fprintf(tty, "PONG from %d\n", p->client_pid);
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free(p);
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i++;
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}
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fprintf(tty, "And that's the demo of packet servers.\n");
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fprintf(tty, "Now running in echo mode, will respond to all clients with whatever they sent.\n");
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while (1) {
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packet_t * p;
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packet_recv(socket, &p);
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packet_send(p->client_port, socket, p->size, p->data);
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free(p);
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}
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}
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static int shell_server_test(fs_node_t * tty, int argc, char * argv[]) {
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if (!shell_server_running) {
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shell_server_running = 1;
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create_kernel_tasklet(tasklet_server, "ktty-server", NULL);
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fprintf(tty, "Started server.\n");
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}
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return 0;
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}
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static int shell_client_test(fs_node_t * tty, int argc, char * argv[]) {
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if (!shell_server_running) {
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fprintf(tty, "No server running, won't be able to connect.\n");
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return 1;
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}
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if (argc < 2) {
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fprintf(tty, "expected argument\n");
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return 1;
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}
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fs_node_t * client_pipe = make_pipe(4096);
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packet_send(shell_server_node, client_pipe, strlen(argv[1])+1, argv[1]);
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while (1) {
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packet_t * p;
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packet_recv(client_pipe, &p);
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fprintf(tty, "Got response from server: %s\n", (char *)p->data);
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free(p);
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break;
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}
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close_fs(client_pipe);
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return 0;
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}
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char * special_thing = "I am a string from the kernel.\n";
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static int shell_mod(fs_node_t * tty, int argc, char * argv[]) {
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if (argc < 2) {
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fprintf(tty, "expected argument\n");
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return 1;
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}
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fs_node_t * file = kopen(argv[1], 0);
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if (!file) {
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fprintf(tty, "Failed to load module: %s\n", argv[1]);
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return 1;
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}
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fprintf(tty, "Okay, going to load a module!\n");
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module_data_t * mod_info = module_load(argv[1]);
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if (!mod_info) {
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fprintf(tty, "Something went wrong, failed to load module: %s\n", argv[1]);
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return 1;
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}
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fprintf(tty, "Loaded %s at 0x%x\n", mod_info->mod_info->name, mod_info->bin_data);
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return 0;
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}
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static int shell_symbols(fs_node_t * tty, int argc, char * argv[]) {
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extern char kernel_symbols_start[];
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extern char kernel_symbols_end[];
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struct ksym {
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uintptr_t addr;
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char name[];
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} * k = (void*)&kernel_symbols_start;
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while ((uintptr_t)k < (uintptr_t)&kernel_symbols_end) {
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fprintf(tty, "0x%x - %s\n", k->addr, k->name);
|
|
k = (void *)((uintptr_t)k + sizeof(uintptr_t) + strlen(k->name) + 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int shell_print(fs_node_t * tty, int argc, char * argv[]) {
|
|
|
|
if (argc < 3) {
|
|
fprintf(tty, "print format_string symbol_name\n");
|
|
return 1;
|
|
}
|
|
|
|
char * format = argv[1];
|
|
char * symbol = argv[2];
|
|
int deref = 0;
|
|
|
|
if (symbol[0] == '*') {
|
|
symbol = &symbol[1];
|
|
deref = 1;
|
|
}
|
|
|
|
extern char kernel_symbols_start[];
|
|
extern char kernel_symbols_end[];
|
|
|
|
struct ksym {
|
|
uintptr_t addr;
|
|
char name[];
|
|
} * k = (void*)&kernel_symbols_start;
|
|
|
|
while ((uintptr_t)k < (uintptr_t)&kernel_symbols_end) {
|
|
if (!strcmp(symbol, k->name)) {
|
|
if (deref) {
|
|
fprintf(tty, format, k->addr);
|
|
} else {
|
|
fprintf(tty, format, *((uintptr_t *)k->addr));
|
|
}
|
|
fprintf(tty, "\n");
|
|
break;
|
|
}
|
|
k = (void *)((uintptr_t)k + sizeof(uintptr_t) + strlen(k->name) + 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int shell_modules(fs_node_t * tty, int argc, char * argv[]) {
|
|
list_t * hash_keys = hashmap_keys(modules_get_list());
|
|
foreach(_key, hash_keys) {
|
|
char * key = (char *)_key->value;
|
|
module_data_t * mod_info = hashmap_get(modules_get_list(), key);
|
|
|
|
fprintf(tty, "%s at 0x%x {.init=0x%x, .fini=0x%x}",
|
|
mod_info->mod_info->name, mod_info->bin_data,
|
|
mod_info->mod_info->initialize, mod_info->mod_info->finalize);
|
|
|
|
if (mod_info->deps) {
|
|
unsigned int i = 0;
|
|
fprintf(tty, " Deps: ");
|
|
while (i < mod_info->deps_length) {
|
|
fprintf(tty, "%s ", &mod_info->deps[i]);
|
|
i += strlen(&mod_info->deps[i]) + 1;
|
|
}
|
|
}
|
|
|
|
fprintf(tty, "\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int shell_mem_info(fs_node_t * tty, int argc, char * argv[]) {
|
|
unsigned int total = memory_total();
|
|
unsigned int free = total - memory_use();
|
|
extern uintptr_t heap_end;
|
|
fprintf(tty, "Total: %d kB\n", total);
|
|
fprintf(tty, "Free: %d kB\n", free);
|
|
fprintf(tty, "Heap End: 0x%x\n", heap_end);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Determine the size of a smart terminal that we don't have direct
|
|
* termios access to. This is done by sending a cursor-move command
|
|
* that will put the cursor into the lower right corner and then
|
|
* requesting the cursor position report. We then read and parse
|
|
* the position report. In the case where the terminal on the other
|
|
* end is actually dumb, we end up waiting for some input and
|
|
* then timing out.
|
|
* TODO with asyncio support, the timeout should actually work.
|
|
* consider also using an alarm (which I also don't have)
|
|
*/
|
|
static void divine_size(fs_node_t * dev, int * width, int * height) {
|
|
char tmp[100];
|
|
int read = 0;
|
|
unsigned long start_tick = timer_ticks;
|
|
memset(tmp, 0, sizeof(tmp));
|
|
/* Move cursor, Request position, Reset cursor */
|
|
set_unbuffered(dev);
|
|
fprintf(dev, "\033[1000;1000H\033[6n\033[H");
|
|
while (1) {
|
|
char buf[1];
|
|
int r = read_fs(dev, 0, 1, (unsigned char *)buf);
|
|
if (r > 0) {
|
|
if (buf[0] != 'R') {
|
|
if (read > 1) {
|
|
tmp[read-2] = buf[0];
|
|
}
|
|
read++;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (timer_ticks - start_tick >= 2) {
|
|
/*
|
|
* We've timed out. This will only be triggered
|
|
* when we eventually receive something, though
|
|
*/
|
|
*width = 80;
|
|
*height = 23;
|
|
/* Clear and return */
|
|
fprintf(dev, "\033[J");
|
|
return;
|
|
}
|
|
}
|
|
/* Clear */
|
|
fprintf(dev, "\033[J");
|
|
/* Break up the result into two strings */
|
|
|
|
for (unsigned int i = 0; i < strlen(tmp); i++) {
|
|
if (tmp[i] == ';') {
|
|
tmp[i] = '\0';
|
|
break;
|
|
}
|
|
}
|
|
char * h = (char *)((uintptr_t)tmp + strlen(tmp)+1);
|
|
/* And then parse it into numbers */
|
|
*height = atoi(tmp);
|
|
*width = atoi(h);
|
|
}
|
|
|
|
static int shell_divinesize(fs_node_t * tty, int argc, char * argv[]) {
|
|
struct winsize size = {0,0,0,0};
|
|
|
|
/* Attempt to divine the terminal size. Changing the window size after this will do bad things */
|
|
int width, height;
|
|
divine_size(tty, &width, &height);
|
|
|
|
fprintf(tty, "Identified size: %d x %d\n", width, height);
|
|
|
|
size.ws_row = height;
|
|
size.ws_col = width;
|
|
|
|
ioctl_fs(tty, TIOCSWINSZ, &size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct shell_command shell_commands[] = {
|
|
{"shell", &shell_create_userspace_shell,
|
|
"Runs a userspace shell on this tty."},
|
|
{"echo", &shell_echo,
|
|
"Prints arguments."},
|
|
{"help", &shell_help,
|
|
"Prints a list of possible shell commands and their descriptions."},
|
|
{"cd", &shell_cd,
|
|
"Change current directory."},
|
|
{"ls", &shell_ls,
|
|
"List files in current or other directory."},
|
|
{"test-hash", &shell_test_hash,
|
|
"Test hashmap functionality."},
|
|
{"log", &shell_log,
|
|
"Configure serial debug logging."},
|
|
{"anagrams", &shell_anagrams,
|
|
"Demo of hashmaps and lists. Give a list of words, get a grouping of anagrams."},
|
|
{"pci", &shell_pci,
|
|
"Print PCI devices, as well as their names and BARs."},
|
|
{"uid", &shell_uid,
|
|
"Change the effective user id of the shell (useful when running `shell`)."},
|
|
{"server-test", &shell_server_test,
|
|
"Spawn a packet server and some clients."},
|
|
{"client-test", &shell_client_test,
|
|
"Communicate with packet server."},
|
|
{"mod", &shell_mod,
|
|
"[testing] Module loading."},
|
|
{"symbols", &shell_symbols,
|
|
"Dump symbol table."},
|
|
{"print", &shell_print,
|
|
"[dangerous] Print the value of a symbol using a format string."},
|
|
{"modules", &shell_modules,
|
|
"Print names and addresses of all loaded modules."},
|
|
{"meminfo", &shell_mem_info,
|
|
"Display various pieces of information kernel and system memory."},
|
|
{"divine-size", &shell_divinesize,
|
|
"Attempt to automatically set the PTY's size to the size of the current window."},
|
|
{NULL, NULL, NULL}
|
|
};
|
|
|
|
void debug_shell_install(struct shell_command * sh) {
|
|
hashmap_set(shell_commands_map, sh->name, sh);
|
|
}
|
|
|
|
/*
|
|
* A TTY object to pass to the tasklets for handling
|
|
* serial-tty interaction. This probably shouldn't
|
|
* be done as tasklets - TTYs should just be able
|
|
* to wrap existing fs_nodes themselves, but that's
|
|
* a problem for another day.
|
|
*/
|
|
struct tty_o {
|
|
fs_node_t * node;
|
|
fs_node_t * tty;
|
|
};
|
|
|
|
/*
|
|
* These tasklets handle tty-serial interaction.
|
|
*/
|
|
static void debug_shell_handle_in(void * data, char * name) {
|
|
struct tty_o * tty = (struct tty_o *)data;
|
|
while (1) {
|
|
uint8_t buf[1];
|
|
int r = read_fs(tty->tty, 0, 1, (unsigned char *)buf);
|
|
write_fs(tty->node, 0, r, buf);
|
|
}
|
|
}
|
|
|
|
static void debug_shell_handle_out(void * data, char * name) {
|
|
struct tty_o * tty = (struct tty_o *)data;
|
|
while (1) {
|
|
uint8_t buf[1];
|
|
int r = read_fs(tty->node, 0, 1, (unsigned char *)buf);
|
|
write_fs(tty->tty, 0, r, buf);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Tasklet for managing the kernel serial console.
|
|
* This is basically a very simple shell, with access
|
|
* to some internal kernel commands, and (eventually)
|
|
* debugging routines.
|
|
*/
|
|
static void debug_shell_run(void * data, char * name) {
|
|
/*
|
|
* We will run on the first serial port.
|
|
* TODO detect that this failed
|
|
*/
|
|
fs_node_t * tty = kopen("/dev/ttyS0", 0);
|
|
|
|
/* Our prompt will include the version number of the current kernel */
|
|
char version_number[1024];
|
|
sprintf(version_number, __kernel_version_format,
|
|
__kernel_version_major,
|
|
__kernel_version_minor,
|
|
__kernel_version_lower,
|
|
__kernel_version_suffix);
|
|
|
|
/* We will convert the serial interface into an actual TTY */
|
|
int master, slave;
|
|
|
|
/* Convert the serial line into a TTY */
|
|
openpty(&master, &slave, NULL, NULL, NULL);
|
|
|
|
/* Attach the serial to the TTY interface */
|
|
struct tty_o _tty = {.node = current_process->fds->entries[master], .tty = tty};
|
|
|
|
create_kernel_tasklet(debug_shell_handle_in, "[kttydebug-in]", (void *)&_tty);
|
|
create_kernel_tasklet(debug_shell_handle_out, "[kttydebug-out]", (void *)&_tty);
|
|
|
|
/* Set the device to be the actual TTY slave */
|
|
tty = current_process->fds->entries[slave];
|
|
|
|
current_process->fds->entries[0] = tty;
|
|
current_process->fds->entries[1] = tty;
|
|
current_process->fds->entries[2] = tty;
|
|
|
|
/* Initialize the shell commands map */
|
|
int retval = 0;
|
|
|
|
while (1) {
|
|
char command[512];
|
|
|
|
/* Print out the prompt */
|
|
if (retval) {
|
|
fprintf(tty, "\033[1;34m%s-%s \033[1;31m%d\033[1;34m %s#\033[0m ", __kernel_name, version_number, retval, current_process->wd_name);
|
|
} else {
|
|
fprintf(tty, "\033[1;34m%s-%s %s#\033[0m ", __kernel_name, version_number, current_process->wd_name);
|
|
}
|
|
|
|
/* Read a line */
|
|
debug_shell_readline(tty, command, 511);
|
|
|
|
char * arg = strdup(command);
|
|
char * argv[1024]; /* Command tokens (space-separated elements) */
|
|
int argc = tokenize(arg, " ", argv);
|
|
|
|
if (!argc) continue;
|
|
|
|
/* Parse the command string */
|
|
struct shell_command * sh = hashmap_get(shell_commands_map, argv[0]);
|
|
if (sh) {
|
|
retval = sh->function(tty, argc, argv);
|
|
} else {
|
|
fprintf(tty, "Unrecognized command: %s\n", argv[0]);
|
|
}
|
|
|
|
free(arg);
|
|
}
|
|
}
|
|
|
|
int debug_shell_start(void) {
|
|
/* Setup shell commands */
|
|
shell_commands_map = hashmap_create(10);
|
|
struct shell_command * sh = &shell_commands[0];
|
|
while (sh->name) {
|
|
hashmap_set(shell_commands_map, sh->name, sh);
|
|
sh++;
|
|
}
|
|
|
|
int i = create_kernel_tasklet(debug_shell_run, "[kttydebug]", NULL);
|
|
debug_print(NOTICE, "Started tasklet with pid=%d", i);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int debug_shell_stop(void) {
|
|
debug_print(NOTICE, "Tried to unload debug shell, but debug shell has no real shutdown routine. Don't do that!");
|
|
return 0;
|
|
}
|
|
|
|
MODULE_DEF(debugshell, debug_shell_start, debug_shell_stop);
|
|
MODULE_DEPENDS(serial);
|