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shell.c
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shell.c
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (c) 1883 Thomas Edison - All Rights Reserved
* You may use, distribute and modify this code under the
* terms of the BSD 3 clause license, which unfortunately
* won't be written for another century.
*/
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include "hardware/structs/scb.h"
#include "pico/bootrom.h"
#include "pico/stdio.h"
#include "pico/stdlib.h"
#include "pico/sync.h"
#include "cc.h"
#include "io.h"
#include "readln.h"
#include "tar.h"
#include "vi.h"
#include "xmodem.h"
#include "ymodem.h"
#if !defined(NDEBUG) || defined(PSHELL_TESTS)
#include "tests.h"
#endif
//#define COPYRIGHT "\u00a9" // for UTF8
#define COPYRIGHT "(c)" // for ASCII
#define MAX_ARGS 16
#define VT_ESC "\033"
#define VT_CLEAR VT_ESC "[H" VT_ESC "[J"
#define VT_BLINK VT_ESC "[5m"
#define VT_BOLD VT_ESC "[1m"
#define VT_NORMAL VT_ESC "[m"
typedef char buf_t[128];
extern char __heap_start;
extern char __heap_end;
buf_t result;
static uint32_t screen_x = 80, screen_y = 24;
static lfs_file_t file;
static buf_t cmd_buffer, path, curdir = "/";
static int argc;
static char* argv[MAX_ARGS + 1];
static bool mounted = false, run = true;
static char console[8];
static void set_translate_crlf(bool enable) {
stdio_driver_t* driver;
#if LIB_PICO_STDIO_UART
driver = &stdio_uart;
#endif
#if LIB_PICO_STDIO_USB
driver = &stdio_usb;
#endif
stdio_set_translate_crlf(driver, enable);
}
// used by Vi
void get_screen_xy(uint32_t* x, uint32_t* y) {
*x = screen_x;
*y = screen_y;
}
static void echo_key(char c) {
putchar(c);
if (c == '\r')
putchar('\n');
}
char* full_path(const char* name) {
if (name == NULL)
return NULL;
if (name[0] == '/') {
strcpy(path, name);
return path;
}
if (strncmp(name, "./", 2) == 0)
name += 2;
strcpy(path, curdir);
if (strncmp(name, "../", 3) != 0) {
if (name[0])
strcat(path, name);
} else {
name += 3; // root doen't have a parent
char* cp = strrchr(path, '/');
if (cp != NULL)
*cp = 0;
cp = strrchr(path, '/');
if (cp != NULL)
*(cp + 1) = 0;
strcat(path, name);
}
return path;
}
static void parse_cmd(void) {
// read line into buffer
char* cp = cmd_buffer;
char* cp_end = cp + sizeof(cmd_buffer);
char prompt[128];
snprintf(prompt, sizeof(prompt), VT_BOLD "%s: " VT_NORMAL, full_path(""));
cp = dgreadln(cmd_buffer, mounted, prompt);
bool not_last = true;
for (argc = 0; not_last && (argc < MAX_ARGS); argc++) {
while ((*cp == ' ') || (*cp == ',') || (*cp == '='))
cp++; // skip blanks
if ((*cp == '\r') || (*cp == '\n'))
break;
argv[argc] = cp; // start of string
while ((*cp != ' ') && (*cp != ',') && (*cp != '=') && (*cp != '\r') && (*cp != '\n'))
cp++; // skip non blank
if ((*cp == '\r') || (*cp == '\n'))
not_last = false;
*cp++ = 0; // terminate string
}
argv[argc] = NULL;
}
static int xmodem_rx_cb(uint8_t* buf, uint32_t len) {
if (fs_file_write(&file, buf, len) != len)
printf("error writing file\n");
}
static int xmodem_tx_cb(uint8_t* buf, uint32_t len) { return fs_file_read(&file, buf, len); }
static bool check_mount(bool need) {
if (mounted == need)
return false;
sprintf(result, "filesystem is %smounted", (need ? "not " : ""));
return true;
}
static bool check_name(void) {
if (argc > 1)
return false;
strcpy(result, "missing file or directory name");
return true;
}
static void xput_cmd(void) {
if (check_mount(true))
return;
if (check_name())
return;
if (fs_file_open(&file, full_path(argv[1]), LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) <
LFS_ERR_OK) {
strcpy(result, "Can't create file");
return;
}
set_translate_crlf(false);
xmodemReceive(xmodem_rx_cb);
set_translate_crlf(true);
busy_wait_ms(3000);
sprintf(result, "\nfile transfered, size: %d", fs_file_seek(&file, 0, LFS_SEEK_END));
fs_file_close(&file);
}
static void yput_cmd(void) {
if (check_mount(true))
return;
if (argc > 1) {
strcpy(result, "yput doesn't take a parameter");
return;
}
char* tmpname = strdup(full_path("ymodem.tmp"));
if (fs_file_open(&file, tmpname, LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) < LFS_ERR_OK) {
strcpy(result, "Can't create file");
return;
}
set_translate_crlf(false);
char name[256];
int res = Ymodem_Receive(&file, 0x7fffffff, name);
set_translate_crlf(true);
fs_file_close(&file);
if (res >= 0) {
sprintf(result, "\nfile transfered, size: %d", fs_file_seek(&file, 0, LFS_SEEK_END));
fs_rename(tmpname, full_path(name));
} else {
strcpy(result, "File transfer failed");
fs_remove(tmpname);
}
free(tmpname);
}
static void cmnt_cmd(void){};
int check_from_to_parms(char** from, char** to, int copy) {
*from = NULL;
*to = NULL;
int rc = 1;
do {
if (argc < 3) {
strcpy(result, "need two names");
break;
}
bool from_is_dir = false;
bool to_is_dir = false;
bool to_exists = false;
*from = strdup(full_path(argv[1]));
if (*from == NULL) {
strcpy(result, "no memory");
break;
}
struct lfs_info info;
if (fs_stat(*from, &info) < LFS_ERR_OK) {
sprintf(result, "%s not found", *from);
break;
}
from_is_dir = info.type == LFS_TYPE_DIR;
*to = strdup(full_path(argv[2]));
if (*to == NULL) {
strcpy(result, "no memory");
break;
}
if (fs_stat(*to, &info) == LFS_ERR_OK) {
to_is_dir = info.type == LFS_TYPE_DIR;
to_exists = 1;
}
if (copy && from_is_dir) {
strcpy(result, "can't copy a directory");
break;
}
if (to_exists && to_is_dir) {
char* name = strrchr(*from, '/') + 1;
bool append_slash = (*to)[strlen(*to) - 1] == '/' ? false : true;
int l = strlen(*to) + strlen(name) + 1;
if (append_slash)
l++;
char* to2 = malloc(l);
if (!to2) {
strcpy(result, "no memory");
break;
}
strcpy(to2, *to);
if (append_slash)
strcat(to2, "/");
strcat(to2, name);
free(*to);
*to = to2;
}
rc = 0;
} while (0);
if (rc) {
if (*from)
free(*from);
if (*to)
free(*to);
}
return rc;
}
static void mv_cmd(void) {
char* from;
char* to;
if (check_from_to_parms(&from, &to, 0))
return;
struct lfs_info info;
if (fs_rename(from, to) < LFS_ERR_OK)
sprintf(result, "could not move %s to %s", from, to);
else
sprintf(result, "%s moved to %s", from, to);
free(from);
free(to);
}
static void news_cmd(void) {
printf("\nWhat's new in version 2.1.5\n\n"
"General\n\n"
" - general source code, cmake, and script file cleanup\n"
" - add support for picow and vgaboard\n"
" - update C example source code\n"
" - centralize reset function, no longer using watchdog\n"
" - remove trim command, garbage collection in littlefs is automatic\n"
" - move all constant variables to flash, releasing RAM to better use\n"
" - expand status command to show memory and screen use.\n"
" - clarify and pack exe file header\n"
" - delete resize cmd, use clear instead\n"
" - improve release_build script (less error prone)\n\n"
"Pico2 specific\n\n"
" - add PWM IRQ numbers\n"
" - all floating pointt operators as well as sqrtf function\n"
" calls are handled directly with inline CM33 floating point\n"
" intructions instead of wrapper calls\n"
" - integer divide and modulus operators are handled using\n"
" inline CM33 hardware integer divide instructions instead\n"
" of wrapper calls\n"
" - use expanded range of movw immediate to reduce amount of PC\n"
" relative addressing\n"
" - many new peep hole optimizer opportunities\n");
}
static void cp_cmd(void) {
char* from;
char* to;
char* buf = NULL;
if (check_from_to_parms(&from, &to, 1))
return;
lfs_file_t in, out;
bool in_ok = false, out_ok = false;
do {
buf = malloc(4096);
if (buf == NULL) {
strcpy(result, "no memory");
break;
}
if (fs_file_open(&in, from, LFS_O_RDONLY) < LFS_ERR_OK) {
sprintf(result, "error opening %s", from);
break;
}
in_ok = true;
if (fs_file_open(&out, to, LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) < LFS_ERR_OK) {
sprintf(result, "error opening %s", from);
break;
}
out_ok = true;
int l = fs_file_read(&in, buf, 4096);
while (l > 0) {
if (fs_file_write(&out, buf, l) != l) {
sprintf(result, "error writing %s", to);
break;
}
l = fs_file_read(&in, buf, 4096);
}
} while (false);
if (in_ok)
fs_file_close(&in);
if (out_ok)
fs_file_close(&out);
if (buf) {
if (out_ok && fs_getattr(from, 1, buf, 4) == 4 && strcmp(buf, "exe") == 0)
fs_setattr(to, 1, buf, 4);
free(buf);
}
if (!result[0])
sprintf(result, "file %s copied to %s", from, to);
free(from);
free(to);
}
static void cat_cmd(void) {
if (check_mount(true))
return;
bool paginate = false;
char* path = NULL;
for (int arg = 1; arg < argc; arg++)
if (strcmp(argv[arg], "-p") == 0)
paginate = true;
else
path = argv[arg];
if (path == NULL) {
strcpy(result, "file name argument is required");
return;
}
lfs_file_t file;
char* fpath = full_path(path);
if (fs_file_open(&file, fpath, LFS_O_RDONLY) < LFS_ERR_OK) {
sprintf(result, "error opening file %s", fpath);
return;
}
int l = fs_file_seek(&file, 0, LFS_SEEK_END);
fs_file_seek(&file, 0, LFS_SEEK_SET);
char* buf = malloc(l);
if (!buf) {
strcpy(result, "insufficient memory");
return;
}
int line = 0;
int last = 0;
if (fs_file_read(&file, buf, l) != l) {
sprintf(result, "error reading file %s", fpath);
goto done;
}
char* cp_end = buf + l;
for (char* cp = buf; cp < cp_end; cp++) {
if (*cp == 0x1A)
break;
putchar(*cp);
if (paginate && line && (last != line) && (line % (screen_y - 1) == 0)) {
char cc = getchar();
if (cc == 0x03)
break;
}
last = line;
if (*cp == 0x0A)
line++;
}
done:
free(buf);
fs_file_close(&file);
}
static void hex_cmd(void) {
if (check_mount(true))
return;
bool paginate = false;
char* path = NULL;
for (int arg = 1; arg < argc; arg++)
if (strcmp(argv[arg], "-p") == 0)
paginate = true;
else
path = argv[arg];
if (path == NULL) {
strcpy(result, "file name argument is required");
return;
}
lfs_file_t file;
char* fpath = full_path(path);
if (fs_file_open(&file, fpath, LFS_O_RDONLY) < LFS_ERR_OK) {
sprintf(result, "error opening file %s", fpath);
return;
}
int l = fs_file_seek(&file, 0, LFS_SEEK_END);
fs_file_seek(&file, 0, LFS_SEEK_SET);
char* buf = malloc(l);
if (!buf) {
strcpy(result, "insufficient memory");
return;
}
if (fs_file_read(&file, buf, l) != l) {
sprintf(result, "error reading file %s", fpath);
goto done;
}
char* p = buf;
char* pend = p + l;
int line = 0;
while (p < pend) {
char* p2 = p;
printf("%04x", (int)(p - buf));
for (int i = 0; i < 16; i++) {
if ((i & 3) == 0)
printf(" ");
if (p + i < pend)
printf("%02x", p[i]);
else
printf(" ");
}
printf(" '");
p = p2;
for (int i = 0; i < 16; i++) {
if (p + i < pend) {
if (isprint(p[i]))
printf("%c", p[i]);
else
printf(".");
} else
printf(" ");
}
printf("'\n");
p += 16;
if (paginate & (++line % (screen_y - 1) == 0)) {
char cc = getchar();
if (cc == 0x03)
break;
}
}
done:
free(buf);
fs_file_close(&file);
}
static void xget_cmd(void) {
if (check_mount(true))
return;
if (check_name())
return;
if (fs_file_open(&file, full_path(argv[1]), LFS_O_RDONLY) < LFS_ERR_OK) {
strcpy(result, "Can't open file");
return;
}
set_translate_crlf(false);
xmodemTransmit(xmodem_tx_cb);
set_translate_crlf(true);
fs_file_close(&file);
}
static void yget_cmd(void) {
if (check_mount(true))
return;
if (check_name())
return;
if (fs_file_open(&file, full_path(argv[1]), LFS_O_RDONLY) < LFS_ERR_OK) {
strcpy(result, "Can't open file");
return;
}
int siz = fs_file_seek(&file, 0, LFS_SEEK_END);
fs_file_seek(&file, 0, LFS_SEEK_SET);
set_translate_crlf(false);
int res = Ymodem_Transmit(full_path(argv[1]), siz, &file);
set_translate_crlf(true);
fs_file_close(&file);
if (res)
strcpy(result, "File transfer failed");
else
sprintf(result, "%d bytes sent", siz);
}
static void mkdir_cmd(void) {
if (check_mount(true))
return;
if (check_name())
return;
if (fs_mkdir(full_path(argv[1])) < LFS_ERR_OK) {
strcpy(result, "Can't create directory");
return;
}
sprintf(result, "%s created", full_path(argv[1]));
}
static char rmdir_path[256];
static bool clean_dir(char* name) {
int path_len = strlen(rmdir_path);
if (path_len)
strcat(rmdir_path, "/");
strcat(rmdir_path, name);
lfs_dir_t dir_f;
if (fs_dir_open(&dir_f, rmdir_path) < LFS_ERR_OK) {
printf("can't open %s directory\n", rmdir_path);
return false;
}
struct lfs_info info;
while (fs_dir_read(&dir_f, &info) > 0)
if (info.type == LFS_TYPE_DIR && strcmp(info.name, ".") && strcmp(info.name, ".."))
if (!clean_dir(info.name)) {
fs_dir_close(&dir_f);
return false;
}
fs_dir_rewind(&dir_f);
while (fs_dir_read(&dir_f, &info) > 0) {
if (info.type == LFS_TYPE_REG) {
int plen = strlen(rmdir_path);
strcat(rmdir_path, "/");
strcat(rmdir_path, info.name);
if (fs_remove(rmdir_path) < LFS_ERR_OK) {
printf("can't remove %s", rmdir_path);
fs_dir_close(&dir_f);
return false;
}
printf("%s removed\n", rmdir_path);
rmdir_path[plen] = 0;
}
}
fs_dir_close(&dir_f);
if (fs_remove(rmdir_path) < LFS_ERR_OK) {
sprintf(result, "can't remove %s", rmdir_path);
return false;
}
printf("%s removed\n", rmdir_path);
rmdir_path[path_len] = 0;
return true;
}
static void rm_cmd(void) {
if (check_mount(true))
return;
if (check_name())
return;
bool recursive = false;
if (strcmp(argv[1], "-r") == 0) {
if (argc < 3) {
strcpy(result, "specify a file or directory name");
return;
}
recursive = true;
argv[1] = argv[2];
}
// lfs won't remove a non empty directory but returns without error!
struct lfs_info info;
char* fp = full_path(argv[1]);
if (fs_stat(fp, &info) < LFS_ERR_OK) {
sprintf(result, "%s not found", full_path(argv[1]));
return;
}
int isdir = 0;
if (info.type == LFS_TYPE_DIR) {
isdir = 1;
lfs_dir_t dir;
fs_dir_open(&dir, fp);
int n = 0;
while (fs_dir_read(&dir, &info))
if ((strcmp(info.name, ".") != 0) && (strcmp(info.name, "..") != 0))
n++;
fs_dir_close(&dir);
if (n) {
if (recursive) {
rmdir_path[0] = 0;
clean_dir(fp);
return;
} else
sprintf(result, "directory %s not empty", fp);
return;
}
}
if (fs_remove(fp) < LFS_ERR_OK)
strcpy(result, "Can't remove file or directory");
sprintf(result, "%s %s removed", isdir ? "directory" : "file", fp);
}
static void mount_cmd(void) {
if (check_mount(false))
return;
if (fs_mount() != LFS_ERR_OK) {
strcpy(result, "Error mounting filesystem");
return;
}
mounted = true;
strcpy(result, "mounted");
}
static void unmount_cmd(void) {
if (check_mount(true))
return;
if (fs_unmount() != LFS_ERR_OK) {
strcpy(result, "Error unmounting filesystem");
return;
}
mounted = false;
strcpy(result, "unmounted");
}
#if !defined(NDEBUG) || defined(PSHELL_TESTS)
static void trim_cmd(void) {
if (check_mount(true))
return;
if (fs_gc() != LFS_ERR_OK)
strcpy(result, "Error trimming filesystem");
else
strcpy(result, "Ok");
}
#endif
static void format_cmd(void) {
if (check_mount(false))
return;
printf("are you sure (y/N) ? ");
fflush(stdout);
parse_cmd();
if ((argc == 0) || ((argv[0][0] | ' ') != 'y')) {
strcpy(result, "user cancelled");
return;
}
if (fs_format() != LFS_ERR_OK)
strcpy(result, "Error formating filesystem");
strcpy(result, "formatted");
}
static void disk_space(uint64_t n, char* buf) {
double d = n;
static const char* suffix[] = {"B", "KB", "MB", "GB", "TB"};
char** sfx = (char**)suffix;
while (d >= 1000.0) {
d /= 1000.0;
sfx++;
}
sprintf(buf, "%.1f%s", d, *sfx);
}
static void status_cmd(void) {
struct fs_fsstat_t stat;
if (mounted) {
fs_fsstat(&stat);
const char percent = 37;
char total_size[32], used_size[32];
disk_space((int64_t)stat.block_count * stat.block_size, total_size);
disk_space((int64_t)stat.blocks_used * stat.block_size, used_size);
#ifndef NDEBUG
printf("\ntext size 0x%x (%d), bss size 0x%x (%d)", stat.text_size, stat.text_size,
stat.bss_size, stat.bss_size);
#endif
sprintf(result, "Storage - blocks: total %d, used %d, size %d (%s of %s, %1.1f%c used)\n",
(int)stat.block_count, (int)stat.blocks_used, (int)stat.block_size, used_size,
total_size, stat.blocks_used * 100.0 / stat.block_count, percent);
} else
sprintf(result, "Storage - not mounted\n");
sprintf(result + strlen(result),
"Memory - heap: %.1fK, program code space: %dK, global data space: %dK\n"
"Console - %s, width %d, height %d",
(&__heap_end - &__heap_start) / 1024.0, prog_space / 1024, data_space / 1024, console,
screen_x, screen_y);
}
static void ls_cmd(void) {
if (check_mount(true))
return;
int show_all = 0;
char** av = argv;
if ((argc > 1) && (strcmp(av[1], "-a") == 0)) {
argc--;
av++;
show_all = 1;
}
if (argc > 1)
full_path(av[1]);
else
full_path("");
lfs_dir_t dir;
if (fs_dir_open(&dir, path) < LFS_ERR_OK) {
strcpy(result, "not a directory");
return;
}
printf("\n");
struct lfs_info info;
while (fs_dir_read(&dir, &info) > 0)
if (strcmp(info.name, ".") && strcmp(info.name, ".."))
if (info.type == LFS_TYPE_DIR)
if ((info.name[0] != '.') || show_all)
printf(" %7d [%s]\n", info.size, info.name);
fs_dir_rewind(&dir);
while (fs_dir_read(&dir, &info) > 0)
if (strcmp(info.name, ".") && strcmp(info.name, ".."))
if (info.type == LFS_TYPE_REG)
if ((info.name[0] != '.') || show_all)
printf(" %7d %s\n", info.size, info.name);
fs_dir_close(&dir);
}
static void cd_cmd(void) {
if (check_mount(true))
return;
if (argc < 2) {
strcpy(path, "/");
goto cd_done;
}
if (strcmp(argv[1], ".") == 0)
goto cd_done;
if (strcmp(argv[1], "..") == 0) {
if (strcmp(curdir, "/") == 0) {
strcpy(result, "not a directory");
return;
}
strcpy(path, curdir);
char* cp = strrchr(path, '/');
if (cp == NULL)
cp = curdir;
*cp = 0;
cp = strrchr(path, '/');
if (cp != NULL)
*(cp + 1) = 0;
goto cd_done;
}
full_path(argv[1]);
lfs_dir_t dir;
if (fs_dir_open(&dir, path) < LFS_ERR_OK) {
strcpy(result, "not a directory");
return;
}
fs_dir_close(&dir);
cd_done:
strcpy(curdir, path);
if (curdir[strlen(curdir) - 1] != '/')
strcat(curdir, "/");
sprintf(result, "changed to %s", curdir);
}
static void cc_cmd(void) {
if (check_mount(true))
return;
cc(0, argc, argv);
}
static void tar_cmd(void) {
if (check_mount(true))
return;
tar(argc, argv);
}
#if !defined(NDEBUG) || defined(PSHELL_TESTS)
static void tests_cmd(void) {
if (check_mount(true))
return;
run_tests(argc, argv);
}
#endif
static void vi_cmd(void) {
if (check_mount(true))
return;
vi(argc - 1, argv + 1);
}
#define NORETURN __attribute__((noreturn))
NORETURN static void reset_after(int ms) {
sleep_ms(ms);
scb_hw->aircr = 0x5FA0004;
for (;;)
;
}
NORETURN static void reboot_cmd(void) {
// release any resources we were using
if (mounted) {
savehist();
fs_unmount();
}
reset_after(500);
}
#if LIB_PICO_STDIO_USB
static void usbboot_cmd(void) {
// release any resources we were using
if (mounted) {
savehist();
fs_unmount();
}
reset_usb_boot(0, 0);
}
#endif
static void quit_cmd(void) {
printf("\nare you sure (Y/n) ? ");
fflush(stdout);
char c = getchar();
putchar(c);
putchar('\n');
if (c != 'y' && c != 'Y' && c != '\r')
return;
// release any resources we were using
if (mounted) {
savehist();
fs_unmount();
}
printf("\nbye!\n");
exit(0);
}
static void version_cmd(void) {
printf("\nPico Shell " PSHELL_GIT_TAG ", LittleFS v%d.%d, Vi " VI_VER ", SDK v%d.%d.%d\n",
LFS_VERSION >> 16, LFS_VERSION & 0xffff, PICO_SDK_VERSION_MAJOR, PICO_SDK_VERSION_MINOR,
PICO_SDK_VERSION_REVISION);
#if !defined(NDEBUG)
printf("gcc %s\n", __VERSION__);
#endif
}
static bool cursor_pos(uint32_t* x, uint32_t* y) {
int rc = false;
*x = 80;
*y = 24;
do {
printf(VT_ESC "[6n");
fflush(stdout);
int k = getchar_timeout_us(100000);
if (k == PICO_ERROR_TIMEOUT)
break;
char* cp = cmd_buffer;
while (cp < cmd_buffer + sizeof cmd_buffer) {
k = getchar_timeout_us(100000);
if (k == PICO_ERROR_TIMEOUT)
break;
*cp++ = k;
}
if (cp == cmd_buffer)
break;
if (cmd_buffer[0] != '[')
break;
*cp = 0;
if (cp - cmd_buffer < 5)
break;
char* end;
uint32_t row, col;
if (!isdigit(cmd_buffer[1]))
break;
errno = 0;
row = strtoul(cmd_buffer + 1, &end, 10);
if (errno)
break;
if (*end != ';' || !isdigit(end[1]))
break;
col = strtoul(end + 1, &end, 10);
if (errno)
break;
if (*end != 'R')
break;
if (row < 1 || col < 1 || (row | col) > 0x7fff)
break;
*x = col;
*y = row;
rc = true;
} while (false);
return rc;
}
static bool screen_size(void) {
int rc = false;
screen_x = 80;
screen_y = 24;
uint32_t cur_x, cur_y;
do {
set_translate_crlf(false);
if (!cursor_pos(&cur_x, &cur_y))
break;
printf(VT_ESC "[999;999H");
if (!cursor_pos(&screen_x, &screen_y))
break;
if (cur_x > screen_x)
cur_x = screen_x;
if (cur_y > screen_y)
cur_y = screen_y;
printf("\033[%d;%dH", cur_y, cur_x);
fflush(stdout);
rc = true;
} while (false);
set_translate_crlf(true);
return rc;
}
static void clear_cmd(void) {
strcpy(result, VT_CLEAR "\n");
screen_size();
}
// clang-format off
const cmd_t cmd_table[] = {
{"cat", cat_cmd, "display a text file, use -p to paginate"},
{"cc", cc_cmd, "compile & run C source file. cc -h for help"},
{"cd", cd_cmd, "change directory"},
{"clear", clear_cmd, "clear the screen"},
{"cp", cp_cmd, "copy a file"},
{"format", format_cmd, "format the filesystem"},
{"hex", hex_cmd, "simple hexdump, use -p to paginate"},
{"ls", ls_cmd, "list a directory, -a to show hidden files"},
{"mkdir", mkdir_cmd, "create a directory"},
{"mount", mount_cmd, "mount the filesystem"},
{"mv", mv_cmd, "rename a file or directory"},
{"news", news_cmd, "what's new in this release"},
{"quit", quit_cmd, "shutdown the system"},
{"reboot", reboot_cmd, "restart the system"},
{"rm", rm_cmd, "remove a file or directory. -r for recursive"},
{"status", status_cmd, "display the filesystem status"},
{"tar", tar_cmd, "manage tar archives"},
#if !defined(NDEBUG) || defined(PSHELL_TESTS)
{"tests", tests_cmd, "run all tests"},
{"trim", trim_cmd, "filesystem garbage collection"},
#endif
{"umount", unmount_cmd, "unmount the filesystem"},
{"version", version_cmd, "display pico shell's version"},
{"vi", vi_cmd, "edit file(s) with vi"},
{"xget", xget_cmd, "xmodem get a file (pico->host)"},
{"xput", xput_cmd, "xmodem put a file (host->pico)"},
{"yget", yget_cmd, "ymodem get a file (pico->host)"},
{"yput", yput_cmd, "ymodem put a file (host->pico)"},
{"#", cmnt_cmd, "comment line"},
{0}
};
// clang-format on
static void help(void) {
printf("\n");
for (int i = 0; cmd_table[i].name; i++)
printf("%7s - %s\n", cmd_table[i].name, cmd_table[i].descr);
}
static const char* search_cmds(int len) {
if (len == 0)
return NULL;
int i, last_i, count = 0;
for (i = 0; cmd_table[i].name; i++)
if (strncmp(cmd_buffer, cmd_table[i].name, len) == 0) {
last_i = i;
count++;
}
if (count != 1)
return NULL;
return cmd_table[last_i].name + len;
}
NORETURN static void Fault_Handler(void) {
static const char* clear = "\n\n" VT_BOLD "*** " VT_BLINK "CRASH" VT_NORMAL VT_BOLD
" - Rebooting in 3 seconds ***" VT_NORMAL "\r\n\n";
for (const char* cp = clear; *cp; cp++)
putchar(*cp);
#ifndef NDEBUG
for (;;)
;
#endif
reset_after(3000);
}
static bool run_as_cmd(const char* dir) {
char* tfn;
if (strlen(dir) == 0)
tfn = full_path(argv[0]);
else {
if (argv[0][0] == '/')
return false;
tfn = argv[0];
}
char* fn = malloc(strlen(tfn) + 6);