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#include "driver.h"
#include <camellia.h>
#include <camellia/compat.h>
#include <camellia/flags.h>
#include <camellia/fs/dir.h>
#include <camellia/fs/misc.h>
#include <camellia/syscalls.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <thread.h>
#include <unistd.h>
enum tstate {
Normal,
Esc,
CSI,
};
enum handles {
Hroot,
Htokill,
};
typedef struct Tokill Tokill;
struct Tokill {
Tokill *next;
char path[]; /* NUL-terminated */
};
static Tokill *tokill = NULL;
static hid_t stdin_pipe[2];
static void w_output(hid_t output, const char *buf, size_t len) {
size_t pos = 0;
while (pos < len) {
int ret = _sys_write(output, buf + pos, len - pos, pos, 0);
if (ret < 0) break;
pos += ret;
}
}
static void send_intr(char *intr) {
for (Tokill *it = tokill; it; it = it->next) {
int fd = camellia_open(it->path, OPEN_WRITE);
// TODO remove dead from list
if (fd < 0) continue;
_sys_write(fd, intr, strlen(intr), -1, 0);
close(fd);
}
}
static void line_editor(void *) {
char readbuf[16], linebuf[256];
size_t linepos = 0;
enum tstate state = Normal;
hid_t input = 0;
hid_t output = stdin_pipe[1];
for (;;) {
int readlen = _sys_read(input, readbuf, sizeof readbuf, -1);
if (readlen < 0) {
errno = -readlen;
err(1, "read");
return;
}
for (int i = 0; i < readlen; i++) {
char c = readbuf[i];
switch (state) {
case Normal:
switch (c) {
case '\b':
case 0x7f:
if (linepos != 0) {
printf("\b \b");
linepos--;
}
break;
case 3: /* C-c */
send_intr("");
break;
case 0x1c: /* C-\ */
send_intr("kill");
break;
case 4: /* EOT, C-d */
if (linepos > 0) {
w_output(output, linebuf, linepos);
linepos = 0;
} else {
_sys_write(output, NULL, 0, 0, 0); /* EOF */
}
break;
case '\n':
case '\r':
printf("\n");
if (linepos < sizeof linebuf)
linebuf[linepos++] = '\n';
w_output(output, linebuf, linepos);
linepos = 0;
break;
case '\e':
state = Esc;
break;
case '\t':
break;
default:
if (linepos < sizeof linebuf) {
linebuf[linepos++] = c;
printf("%c", c);
}
break;
}
break;
case Esc:
if (c == '[') state = CSI;
else state = Normal;
break;
case CSI:
if (0x40 <= c && c <= 0x7E) state = Normal;
break;
}
}
}
}
static void fs(void *) {
const size_t buflen = 1024;
char *buf = malloc(buflen);
int pipefd = stdin_pipe[0];
if (!buf) err(1, "malloc");
for (;;) {
struct ufs_request req;
hid_t reqh = ufs_wait(buf, buflen, &req);
int id = (int)req.id;
if (reqh < 0) errx(1, "ufs_wait error");
if (req.op == VFSOP_OPEN) {
if (strcmp(buf, "/") == 0) {
_sys_fs_respond(reqh, (void*)Hroot, 0, 0);
} else if (strcmp(buf, "/tokill") == 0) {
_sys_fs_respond(reqh, (void*)Htokill, 0, 0);
} else if (strcmp(buf, "/stdin") == 0) {
_sys_fs_respond(reqh, NULL, pipefd, FSR_DELEGATE);
} else {
_sys_fs_respond(reqh, NULL, -ENOENT, 0);
}
} else if (id == Hroot && (req.op == VFSOP_READ || req.op == VFSOP_GETSIZE)) {
struct dirbuild db;
char *target = req.op == VFSOP_READ ? buf : NULL;
dir_start(&db, req.offset, target, buflen);
dir_append(&db, "stdin");
_sys_fs_respond(reqh, target, dir_finish(&db), 0);
} else if (id == Htokill && req.op == VFSOP_WRITE) {
// alternatively, pass fd?
Tokill *head = calloc(sizeof(Tokill) + req.len + 1, 1);
if (!head) {
_sys_fs_respond(reqh, NULL, -ENOMEM, 0);
continue;
}
memcpy(head->path, buf, req.len);
head->next = tokill;
tokill = head;
_sys_fs_respond(reqh, NULL, req.len, 0);
} else {
_sys_fs_respond(reqh, NULL, -ENOSYS, 0);
}
}
}
// TODO turn into a separate binary
void termcook(void) {
if (_sys_pipe(stdin_pipe, 0) < 0)
err(1, "pipe");
thread_create(0, fs, NULL);
thread_create(0, line_editor, NULL);
_sys_await();
exit(1);
}
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