254 lines
7.8 KiB
C
254 lines
7.8 KiB
C
// User application entry points for shell_posix.
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <dirent.h>
|
|
#include <spawn.h>
|
|
#include <sys/wait.h>
|
|
#include <ntlite/posix_extensions.h>
|
|
#include <ntlite/syscall.h>
|
|
|
|
#define MAX_CMD 256
|
|
|
|
static int hIn = 0; static int hOut = 1;
|
|
|
|
// Prints the requested operation.
|
|
static void print(const char* s) { write(hOut, s, strlen(s)); }
|
|
|
|
// Returns line.
|
|
static void readLine(char* buf, int len) {
|
|
int pos = 0;
|
|
while (true) {
|
|
char c; if (read(hIn, &c, 1) <= 0) break;
|
|
if (c == '\r' || c == '\n') { print("\n"); break; }
|
|
if (c == '\x1B') {
|
|
while (pos > 0) { --pos; print("\b \b"); }
|
|
continue;
|
|
}
|
|
if ((c == '\b' || c == 127) && pos > 0) { pos--; print("\b \b"); continue; }
|
|
if (c < 0x20 || c == 127) continue;
|
|
if (pos < len - 1) { buf[pos++] = c; char echo[2] = {c, '\0'}; print(echo); }
|
|
}
|
|
buf[pos] = '\0';
|
|
}
|
|
|
|
// Implements the split Command Line operation.
|
|
static int splitCommandLine(char* line, char** argv, int maxArgv) {
|
|
int argc = 0;
|
|
char* p = line;
|
|
|
|
while (*p && argc < maxArgv - 1) {
|
|
while (*p == ' ' || *p == '\t') p++;
|
|
if (!*p) break;
|
|
|
|
if (*p == '"') {
|
|
p++;
|
|
argv[argc++] = p;
|
|
while (*p && *p != '"') p++;
|
|
if (*p) *p++ = '\0';
|
|
} else {
|
|
argv[argc++] = p;
|
|
while (*p && *p != ' ' && *p != '\t') p++;
|
|
if (*p) *p++ = '\0';
|
|
}
|
|
}
|
|
|
|
argv[argc] = NULL;
|
|
return argc;
|
|
}
|
|
|
|
// Implements the trim operation.
|
|
static char* trim(char* s) {
|
|
while (*s == ' ') s++;
|
|
int len = (int)strlen(s);
|
|
while (len > 0 && s[len - 1] == ' ') len--;
|
|
s[len] = '\0';
|
|
return s;
|
|
}
|
|
|
|
// Implements the cmd help operation.
|
|
static void cmd_help() {
|
|
print("Available commands:\n"
|
|
" help - Show this list\n"
|
|
" dir [path] - List directory contents\n"
|
|
" cd <path> - Change directory\n"
|
|
" type <file> - Display file contents\n"
|
|
" del <file> - Delete a file\n"
|
|
" write <file> <txt> - Create a file with text\n"
|
|
" clear - Clear the screen\n"
|
|
" shutdown - Request system shutdown\n"
|
|
" reboot - Request system restart\n"
|
|
" exit - Close the shell\n");
|
|
}
|
|
|
|
// Implements the cmd write operation.
|
|
static void cmd_write(const char* args) {
|
|
char filename[MAX_CMD]; int i = 0;
|
|
while (args[i] != ' ' && args[i] != '\0' && i < MAX_CMD - 1) {
|
|
filename[i] = args[i]; i++;
|
|
}
|
|
filename[i] = '\0';
|
|
if (args[i] == '\0' || args[i+1] == '\0') { print("write: usage: write <filename> <text>\n"); return; }
|
|
int fd = open(filename, 0x0241, 0644); // O_WRONLY | O_CREAT | O_TRUNC
|
|
if (fd < 0) { print("write: could not create file\n"); return; }
|
|
write(fd, args + i + 1, strlen(args + i + 1));
|
|
close(fd);
|
|
print("File written successfully.\n");
|
|
}
|
|
|
|
typedef struct SHELL_POSIX_DIR_ENTRY {
|
|
char Name[NAME_MAX + 1];
|
|
unsigned char Type;
|
|
} SHELL_POSIX_DIR_ENTRY;
|
|
|
|
// Returns an ASCII lower-case value for case-insensitive directory sorting.
|
|
static char shellAsciiLower(char c) {
|
|
if (c >= 'A' && c <= 'Z')
|
|
return (char)(c - 'A' + 'a');
|
|
return c;
|
|
}
|
|
|
|
// Compares two names using case-insensitive order with a stable case tie-breaker.
|
|
static int shellCompareNames(const char* a, const char* b) {
|
|
size_t i = 0;
|
|
if (!a) a = "";
|
|
if (!b) b = "";
|
|
|
|
while (true) {
|
|
char ca = shellAsciiLower(a[i]);
|
|
char cb = shellAsciiLower(b[i]);
|
|
if (ca != cb)
|
|
return (ca < cb) ? -1 : 1;
|
|
if (ca == '\0')
|
|
break;
|
|
i++;
|
|
}
|
|
|
|
return strcmp(a, b);
|
|
}
|
|
|
|
// Sorts directory entries alphabetically.
|
|
static void shellSortDirEntries(SHELL_POSIX_DIR_ENTRY* entries, size_t count) {
|
|
for (size_t i = 1; i < count; i++) {
|
|
SHELL_POSIX_DIR_ENTRY current = entries[i];
|
|
size_t j = i;
|
|
while (j > 0 && shellCompareNames(current.Name, entries[j - 1].Name) < 0) {
|
|
entries[j] = entries[j - 1];
|
|
j--;
|
|
}
|
|
entries[j] = current;
|
|
}
|
|
}
|
|
|
|
// Implements the cmd dir operation.
|
|
static void cmd_dir(const char* path) {
|
|
const char* target = (path && *path != '\0') ? path : ".";
|
|
DIR* d = opendir(target);
|
|
if (!d) { print("dir: cannot access directory\n"); return; }
|
|
|
|
SHELL_POSIX_DIR_ENTRY* entries = NULL;
|
|
size_t count = 0;
|
|
size_t capacity = 0;
|
|
|
|
dirent* entry;
|
|
while ((entry = readdir(d)) != NULL) {
|
|
if (count == capacity) {
|
|
size_t nextCapacity = capacity ? capacity * 2u : 64u;
|
|
SHELL_POSIX_DIR_ENTRY* next = (SHELL_POSIX_DIR_ENTRY*)realloc(entries, nextCapacity * sizeof(SHELL_POSIX_DIR_ENTRY));
|
|
if (!next) {
|
|
print("dir: out of memory\n");
|
|
free(entries);
|
|
closedir(d);
|
|
return;
|
|
}
|
|
entries = next;
|
|
capacity = nextCapacity;
|
|
}
|
|
|
|
strncpy(entries[count].Name, entry->d_name, NAME_MAX);
|
|
entries[count].Name[NAME_MAX] = '\0';
|
|
entries[count].Type = entry->d_type;
|
|
count++;
|
|
}
|
|
|
|
closedir(d);
|
|
shellSortDirEntries(entries, count);
|
|
for (size_t i = 0; i < count; i++) {
|
|
print(entries[i].Type == DT_DIR ? "<DIR> " : " ");
|
|
print(entries[i].Name);
|
|
print("\n");
|
|
}
|
|
free(entries);
|
|
}
|
|
|
|
// Implements the cmd type operation.
|
|
static void cmd_type(const char* filename) {
|
|
int fd = open(filename, 0); // O_RDONLY
|
|
if (fd < 0) { print("type: cannot open file\n"); return; }
|
|
char buffer[512];
|
|
ssize_t n;
|
|
while ((n = read(fd, buffer, 511)) > 0) { buffer[n] = '\0'; print(buffer); }
|
|
close(fd); print("\n");
|
|
}
|
|
|
|
// Runs command.
|
|
static bool runCommand(const char* cmd) {
|
|
if (!cmd || *cmd == '\0') return false;
|
|
if (strcmp(cmd, "shutdown") == 0 || strcmp(cmd, "reboot") == 0) {
|
|
uint32_t action = strcmp(cmd, "reboot") == 0
|
|
? SYS_POWER_ACTION_RESTART : SYS_POWER_ACTION_SHUTDOWN;
|
|
KSTATUS st = SysRequestSystemPower(action);
|
|
if (!KSUCCESS(st)) print("power: request failed\n");
|
|
return false;
|
|
}
|
|
if (strcmp(cmd, "exit") == 0) return true;
|
|
if (strcmp(cmd, "help") == 0) { cmd_help(); return false; }
|
|
if (strcmp(cmd, "clear") == 0) { clearscreen(); return false; }
|
|
if (strcmp(cmd, "crash") == 0) { *(volatile int*)0 = 42; return false; }
|
|
if (strcmp(cmd, "dir") == 0) { cmd_dir("."); return false; }
|
|
if (strncmp(cmd, "dir ", 4) == 0) { cmd_dir(cmd + 4); return false; }
|
|
if (strncmp(cmd, "cd ", 3) == 0) { if (chdir(cmd + 3) != 0) print("cd: failed\n"); return false; }
|
|
if (strncmp(cmd, "del ", 4) == 0) { unlink(cmd + 4); return false; }
|
|
if (strncmp(cmd, "type ", 5) == 0) { cmd_type(cmd + 5); return false; }
|
|
if (strncmp(cmd, "write ", 6) == 0) { cmd_write(cmd + 6); return false; }
|
|
|
|
char cmdBuf[MAX_CMD];
|
|
strncpy(cmdBuf, cmd, MAX_CMD - 1);
|
|
cmdBuf[MAX_CMD - 1] = '\0';
|
|
|
|
char* argv[32];
|
|
int argc = splitCommandLine(cmdBuf, argv, 32);
|
|
if (argc == 0) return false;
|
|
|
|
int pid;
|
|
if (posix_spawn(&pid, argv[0], NULL, NULL, argv, NULL) == 0) {
|
|
int status; waitpid(pid, &status, 0);
|
|
clearkeyboard();
|
|
} else { print("shell: launch failed\n"); }
|
|
return false;
|
|
}
|
|
|
|
// Runs the requested operation.
|
|
int main(void) {
|
|
|
|
const char* cmdline = posix_get_command_line();
|
|
char lineBuf[MAX_CMD];
|
|
|
|
print("shell: command line: ");
|
|
print(cmdline);
|
|
print("\n");
|
|
print("shell: ready\n");
|
|
while (true) {
|
|
print("> ");
|
|
readLine(lineBuf, MAX_CMD);
|
|
if (runCommand(trim(lineBuf))) break;
|
|
}
|
|
print("shell: goodbye\n");
|
|
exit(0);
|
|
}
|