/* inet_aton */
#define KMAX 256 /* keyboard queue */
#define SMAX 256 /* keyboard queue */
#define ROWS 25
#define COLS 80
#define INBUFSZ 4096 /* GET/POST queries */
#define OUTBUFSZ (5*ROWS*COLS) /* output buffer */
/* supported mime types -- suffix space mime. Default is text/plain.
* processed by getmime(filename)
*/
static const char *mime_types[] = {
"html text/html",
"htm text/html",
"js text/javascript",
"css text/css",
NULL
};
/*
* struct my_sock contains support for talking to the browser.
* It contains a buffer for receiving the incoming request,
* hold a copy of the response, and support for an mmapped file.
* Initially, reply = 0, len = sizeof(inbuf) and pos = 0,
* we accumulate data into inbuf and call parse_msg() to tell
* whether we are done.
* During the reply phase, inbuf contains the response hdr,
* possibly map contains the body, len = header length, body_len = body_len
* and pos = 0. We first send the header, then toggle len = -body_len,
* and then send the body. When done, detach the buffer.
* If filep is set, then map is a mapped file, otherwise points to
* some other buffer and does not need to be freed.
*/
struct my_sock {
struct my_sock *next;
int socket; /* the network socket */
int reply; /* set when replying */
int pos, len; /* read position and length */
struct sockaddr_in sa; /* not used */
char inbuf[INBUFSZ]; /* I/O buffer */
char outbuf[OUTBUFSZ]; /* I/O buffer */
/* memory mapped file */
int filep;
int body_len;
char *map;
};
/*
* struct my_sess describes a shell session to which we talk.
*/
struct my_sess {
struct my_sess *next;
char *name; /* session name */
int pid; /* pid of the child */
int master; /* master tty */
/* screen/keyboard buf have len *pos. *pos is the next byte to send */
int kseq; // need a sequence number for kb input ?
int klen; /* pending input for keyboard */
char keys[KMAX];
int slen; /* pending input for screen */
char sbuf[SMAX];
int rows, cols; /* geometry */
int cur;
char *page; /* dump of the screen */
char *oldpage; /* dump of the screen */
};
/*
* my_args contains all the arguments for the program
*/
struct my_args {
struct sockaddr_in sa;
char *cmd; /* command to run */
int nsess; /* number of sessions */
int lfd; /* listener fd */
struct my_sock *socks;
struct my_sess *sess;
int cycles;
int unsafe; /* allow read all file systems */
int verbose; /* allow read all file systems */
};
int myerr(const char *s)
{
fprintf(stderr, "error: %s\n", s);
exit(2);
}
/* convert the html encoding back to plain ascii
* XXX must be fixed to handle UTF8
*/
char *unescape(char *s)
{
char *src, *dst, c, *hex = "0123456789abcdef0123456789ABCDEF";
for (src = dst = s; *src; ) {
c = *src++;
if (c == '+') c = ' ';
else if (c == '%') {
c = '\0';
if (*src && index(hex, *src)) c = c*16 + ((index(hex, *src++)-hex)&0xf);
if (*src && index(hex, *src)) c = c*16 + ((index(hex, *src++)-hex)&0xf);
}
*dst++ = c;
}
*dst++ = '\0';
return s;
}
/*
* append a string to a page, interpreting ANSI sequences
*/
char *page_append(struct my_sess *sh, char *s)
{
int pagelen = sh->rows * sh->cols;
int curcol;
for (; *s; s++) {
char c = *s;
if (sh->cur >= pagelen) {
// fprintf(stderr, "+++ scroll at %d / %d +++\n", sh->cur, pagelen);
sh->cur = pagelen - sh->cols;
memcpy(sh->page, sh->page + sh->cols, sh->cur);
memset(sh->page + pagelen - sh->cols, ' ', sh->cols);
}
curcol = sh->cur % sh->cols;
/* now should map actions */
if (c == '\r') {
sh->cur -= curcol;
} else if (c == '\n') {
sh->cur += sh->cols;
if (sh->cur >= pagelen) { // XXX not sure if needed
// fprintf(stderr, "+++ scroll2 at %d / %d +++\n", sh->cur, pagelen);
sh->cur -= sh->cols;
memcpy(sh->page, sh->page + sh->cols, sh->cur);
memset(sh->page + pagelen - sh->cols, ' ', sh->cols);
}
} else if (c == '\t') {
if (curcol >= pagelen - 8)
sh->cur += (sh->cols - 1 - curcol);
else
sh->cur += 8 - (sh->cur % 8);
} else if (c == '\b') { // backspace
if (curcol > 0)
sh->cur--;
sh->page[sh->cur] = ' ';
} else if (c == '\033') { /* escape */
if (!s[1])
break; // process later
if (s[1] == '[' ) { // CSI found
/* see http://en.wikipedia.org/wiki/ANSI_escape_code */
char *parm, *base = s + 2, cmd, mark=' ';
int a1= 1, a2= 1, a3 = 1;
// fprintf(stderr, "+++ CSI FOUND ESC-%s\n", s+1);
if (*base == '?')
mark = *base++;
if (!*base)
break; // process later
// skip parameters
for (parm = base; *parm && index("0123456789;", *parm); parm++) ;
// fprintf(stderr, "+++ now PARM %s\n", parm);
cmd = parm[0];
if (!cmd)
return s; // process later
s = parm;
sscanf(base, "%d;%d;%d", &a1, &a2, &a3);
if (cmd == 'A') { // up
while (a1-- > 0) {
if (sh->cur >= sh->cols) sh->cur -= sh->cols;
}
} else if (cmd == 'B') { // down
while (a1-- > 0) {
if (sh->cur < pagelen -sh->cols) sh->cur += sh->cols;
}
} else if (cmd == 'C') { // right
if (a1 >= sh->cols - curcol) a1 = sh->cols - curcol - 1;
sh->cur += a1;
} else if (cmd == 'D') { // left
if (a1 > curcol) a1 = curcol;
sh->cur -= a1;
} else if (cmd == 'H' || cmd == 'f') { // position
if (a1 > sh->rows) a1 = sh->rows;
if (a2 > sh->cols) a2 = sh->cols;
sh->cur = (a1 - 1)*sh->cols + a2 - 1;
} else if (cmd == 'J') { /* clear part of screen */
if (base == parm || a1 == 0) {
a1 = pagelen - sh->cols;
memset(sh->page + sh->cur, ' ', a1);
} else if (a1 == 1) {
memset(sh->page, ' ', sh->cur);
} else if (a1 == 2) {
memset(sh->page, ' ', pagelen);
sh->cur = 0; // msdos ansy.sys
} else {
goto notfound;
}
} else if (cmd == 'K') { /* clear */
if (base == parm || a1 == 0) {
a1 = sh->cols - curcol;
memset(sh->page + sh->cur, ' ', a1);
} else if (a1 == 1) {
goto notfound;
} else if (a1 == 2) {
goto notfound;
} else {
goto notfound;
}
} else if (mark == '?' && cmd == 'l') { /* hide cursor */
goto notfound;
} else if (mark == '?' && cmd == 'h') { /* show cursor */
goto notfound;
} else {
notfound:
fprintf(stderr, "ANSI sequence %d %d %d ( ESC-[%c%.*s)\n",
a1, a2, a3, mark, (parm+1 - base), base);
}
}
} else {
sh->page[sh->cur] = *s;
if (curcol != sh->cols -1) sh->cur++;
}
if (sh->cur >= pagelen)
fprintf(stderr,"--- ouch, overflow on c %d\n", c);
}
if (*s) {
fprintf(stderr, "----- leftover stuff ESC [%s]\n", s+1);
}
return s;
}
int forkchild(struct my_sess *s, char *cmd)
{
struct winsize ws;
bzero(&ws, sizeof(ws));
ws.ws_row = s->rows;
ws.ws_col = s->cols;
s->pid = forkpty(&s->master, NULL, NULL, &ws);
// fprintf(stderr, "forkpty gives pid %d pty %d\n", s->pid, s->master);
if (s->pid < 0) {
fprintf(stderr, "forkpty failed\n");
return 1;
}
if (s->pid == 0) { /* execvp the shell */
char *av[] = { cmd, NULL};
execvp(av[0], av);
exit(1);
}
return 0;
}
int u_mode(struct my_args *me, struct my_sock *ss, char *body)
{
/* ajaxterm parameters */
char *s = NULL, *w = NULL, *h = NULL, *c = NULL, *k = NULL;
char *cur, *p, *p2;
struct timeval t;
char tmp[ROWS*COLS+1];
char *src, *dst;
char done;
int i, l, rows = 0, cols = 0;
struct my_sess *sh = NULL;
for (p = body; (cur = strsep(&p, "&")); ) {
if (!*cur) continue;
p2 = strsep(&cur, "=");
if (!strcmp(p2, "s")) s = cur;
if (!strcmp(p2, "w")) w = cur;
if (!strcmp(p2, "h")) h = cur;
if (!strcmp(p2, "c")) c = cur;
if (!strcmp(p2, "k")) k = cur;
}
if (!s || !*s)
goto error;
if (w) cols = atoi(w);
if (cols < 10 || cols > 150) cols = 80;
if (h) rows = atoi(h);
if (rows < 4 || rows > 80) rows = 25;
for (i = 0, sh = me->sess; sh; sh = sh->next, i++) {
// fprintf(stderr, "at %p have %s\n", sh, sh->name);
if (!strcmp(s, sh->name))
break;
}
if (!sh) {
// fprintf(stderr, "--- session %s not found %d\n", s, i);
int l1 = rows * cols + 1;
int l2 = strlen(s) + 1;
int pagelen = rows*cols;
sh = calloc(1, sizeof(*sh) + l1*2 + l2);
if (!sh)
goto error;
sh->rows = rows;
sh->cols = cols;
sh->cur = 0;
sh->name = (char *)(sh + 1);
sh->page = sh->name + l2;
sh->oldpage = sh->page + l1;
memset(sh->page, ' ', pagelen);
strcpy(sh->name, s);
sh->next = me->sess;
me->sess = sh;
if (forkchild(sh, me->cmd)) {
ss->len = sprintf(ss->outbuf,
"HTTP/1.1 400 fork failed\r\n\r\n");
return 0;
}
}
unescape(k);
strncat(sh->keys + sh->klen, k, sizeof(sh->keys) - 1 - sh->klen);
sh->klen = strlen(sh->keys);
rows = sh->rows;
cols = sh->cols;
src = sh->page;
sh->page[rows*cols] = '\0'; // ensure it is terminated XXX bug in cursor handling
if (!strcmp(sh->page, sh->oldpage)) {
/* no modifications, compact version */
same:
ss->len = sprintf(ss->outbuf,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/xml\r\n\r\n"
""
"");
if (me->verbose) fprintf(stderr, "response %s\n", ss->outbuf);
return 0;
} else {
strcpy(sh->oldpage, sh->page);
}
goto good;
error:
goto same;
rows = ROWS;
cols = COLS;
gettimeofday(&t, NULL);
l = sprintf(tmp, "session %p at %d.%06d pressed %s",
ss, (int)t.tv_sec, (int)(t.tv_usec), k);
src = tmp;
good:
ss->len = sprintf(ss->outbuf,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/xml\r\n\r\n"
""
"");
done = '\0';
for (i=0, dst = ss->outbuf + ss->len; i < rows*cols;) {
char cc = done ? done : src[i];
if (!cc) done = cc = ' ';
if (sh && src == sh->page && i == sh->cur)
dst += sprintf(dst, "");
if (isalnum(cc) || cc == ' ') // XXX
*dst++ = cc;
else
dst += sprintf(dst, "%%%02x", cc);
if (sh && src == sh->page && i == sh->cur)
dst += sprintf(dst, "");
if (++i % cols == 0)
*dst++ = '\n';
}
l = sprintf(dst, "");
ss->len = dst + l - ss->outbuf;
if (me->verbose) fprintf(stderr, "response %s\n", ss->outbuf);
return 0;
}
/*
* HTTP support
*/
int opensock(struct sockaddr_in sa)
{
int fd;
int i;
fd = socket(sa.sin_family, SOCK_STREAM, 0);
if (fd < 0) {
perror(" cannot create socket");
return -1;
}
fcntl(fd, F_SETFD, 1 ); // close on exec
i = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i) ) < 0 ) {
perror(" cannot reuseaddr");
return -1;
}
if (bind(fd, (struct sockaddr *)&sa, sizeof(struct sockaddr_in))) {
perror( "bind" );
return -1;
}
if (listen(fd, 20) < 0 ) {
perror( "listen" );
return -1;
}
return fd;
}
int handle_listen(struct my_args *me)
{
int fd;
unsigned int l;
struct sockaddr_in sa;
struct my_sock *s;
if (me->verbose) fprintf(stderr, "listening socket\n");
bzero(&sa, sizeof(sa));
l = sizeof(sa);
fd = accept(me->lfd, (struct sockaddr *)&sa, &l);
if (fd < 0) {
fprintf(stderr, "listen failed\n");
return -1;
}
s = calloc(1, sizeof(*s));
if (!s) {
close(fd);
fprintf(stderr, "alloc failed\n");
return -1;
}
s->sa = sa;
s->socket = fd;
s->filep = -1; /* no file */
s->pos = 0;
s->len = sizeof(s->inbuf);
s->next = me->socks;
me->socks = s;
return 0;
}
/* support function to return mime types. */
const char *getmime(const char *res)
{
const char **p, *suffix;
int lres = strlen(res);
res += lres; /* move to the end of the resource */
for (p = mime_types; (suffix = *p); p++) {
int lsuff = strcspn(suffix, " ");
if (lsuff > lres)
continue;
if (!bcmp(res - lsuff, suffix, lsuff))
return suffix + lsuff + 1;
}
return "text/plain"; /* default */
}
/*
* A stripped down parser for http, which also interprets what
* we need to do.
*/
int parse_msg(struct my_args *me, struct my_sock *s)
{
char *a, *b, *c = s->inbuf; /* strsep support */
char *body, *method = NULL, *resource = NULL;
int row, tok;
int clen = -1;
char *err = "generic error";
if (s->pos == s->len) { // buffer full, we are done
fprintf(stderr, "--- XXX input buffer full\n");
s->len = 0; // complete
}
/* locate the end of the header. If not found, just return */
body = strstr(s->inbuf, "\n\r\n") + 3;
if (body < s->inbuf) body = strstr(s->inbuf, "\n\n") + 2;
if (body < s->inbuf && s->len) return 0;
/* quick search for content length */
a = strcasestr(s->inbuf, "Content-length:");
if (a && a < body) {
sscanf(a + strlen("Content-length:") + 1, "%d", &clen);
if (me->verbose) fprintf(stderr, "content length = %d, body len %d\n",
clen, s->pos - (body - s->inbuf));
if (s->pos - (body - s->inbuf) != clen)
return 0;
}
/* no content length, hope body is complete */
/* XXX maybe do a multipass */
/* now parse the header */
for (row=0; (b = strsep(&c, "\r\n"));) {
if (*b == '\0') continue;
if (b > body) {
body = b;
break;
}
row++;
for (tok=0; (a = strsep(&b, " \t"));) {
if (*a == '\0') continue;
tok++;
if (row == 1) {
if (tok == 1) method = a;
if (tok == 2) resource = a;
}
}
}
s->reply = 1; /* body found, we move to reply mode. */
if (me->verbose) fprintf(stderr, "%s %s\n", method, resource);
if (me->verbose) fprintf(stderr, "+++ request body [%s]\n", body);
s->pos = 0;
if (!strcmp(method, "POST") && !strcmp(resource, "/u")) {
/* this is the ajax request */
return u_mode(me, s, body);
} else if (!strcmp(method, "GET") && !strncmp(resource, "/u?", 3)) {
/* same ajax request using GET */
return u_mode(me, s, resource+3);
} else { /* request for a file, map and serve it */
struct stat sb;
err = "invalid pathname";
if (!me->unsafe && resource[1] == '/')
goto error; /* avoid absolute pathnames */
for (a = resource+1; *a; a++) { /* avoid back pointers */
if (*a == '.' && a[1] == '.')
goto error;
}
if (!strcmp(resource, "/"))
resource = "/ajaxterm.html";
s->filep = open(resource+1, O_RDONLY);
err = "open failed";
if (s->filep < 0 || fstat(s->filep, &sb))
goto error;
err = "mmap failed";
/* linux wants MAP_PRIVATE or MAP_SHARED, not 0 */
s->map = mmap(NULL, (int)sb.st_size, PROT_READ, MAP_PRIVATE, s->filep, (off_t)0);
if (s->map == MAP_FAILED)
goto error;
s->body_len = sb.st_size;
s->len = sprintf(s->outbuf,
"HTTP/1.1 200 OK\r\n"
"Content-Type: %s\r\nContent-Length: %d\r\n\r\n",
getmime(resource+1), (int)sb.st_size);
return 0;
}
error:
if (s->filep >= 0)
close(s->filep);
s->len = sprintf(s->outbuf,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/plain\r\n\r\nResource %s : %s\n", resource, err);
return 0;
}
/*
* Handle I/O on the socket talking to the browser.
* We always use it in half duplex
*/
int sock_io(struct my_args *me, struct my_sock *s)
{
int l;
if (s->reply) {
/* first write the header, then set s->len negative and
* write the mapped file
*/
if (s->len > 0) {
l = write(s->socket, s->outbuf + s->pos, s->len - s->pos);
} else {
l = write(s->socket, s->map + s->pos, s->body_len - s->pos);
}
if (l <= 0)
goto write_done;
s->pos += l;
if (me->verbose) fprintf(stderr, "written1 %d/%d\n", s->pos, s->len);
if (s->pos == s->len) { /* header sent, move to the body */
s->len = -s->body_len;
s->pos = 0;
}
if (me->verbose) fprintf(stderr, "written2 %d/%d\n", s->pos, -s->len);
if (s->pos == -s->len) { /* body sent, close */
write_done:
if (me->verbose) fprintf(stderr, "reply complete\n");
/* the kindle wants shutdown before close */
shutdown(s->socket, SHUT_RDWR);
close(s->socket);
s->len = 0;
if (s->filep) {
if (s->map) munmap(s->map, s->body_len);
close(s->filep);
}
}
} else { /* accumulate request */
l = read(s->socket, s->inbuf + s->pos, s->len - s->pos);
if (me->verbose) fprintf(stderr, "read %p returns %d %s\n", s, l, s->inbuf);
if (l <= 0) {
fprintf(stderr, "buf [%s]\n", s->inbuf);
s->len = 0; // mark done with read
} else {
s->pos += l;
}
parse_msg(me, s); /* check if msg is complete */
}
return 0;
}
int shell_keyboard(struct my_args *me, struct my_sess *sh)
{
int l;
l = write(sh->master, sh->keys, sh->klen);
if (l <= 0)
return 1;
strcpy(sh->keys, sh->keys + l);
sh->klen -= l;
return 0;
}
/* process screen output from the shell */
int shell_screen(struct my_args *me, struct my_sess *p)
{
int l, spos;
char *s;
spos = strlen(p->sbuf);
l = read(p->master, p->sbuf + spos, sizeof(p->sbuf) - 1 - spos);
if (l <= 0) {
fprintf(stderr, "--- screen gives %d\n", l);
p->master = -1;
return 1;
}
spos += l;
p->sbuf[spos] = '\0';
s = page_append(p, p->sbuf); /* returns unprocessed pointer */
strcpy(p->sbuf, s);
return 0;
}
/*
* Main loop implementing web server and connection handling
*/
int mainloop(struct my_args *me)
{
fprintf(stderr, "listen on %s:%d\n",
inet_ntoa(me->sa.sin_addr), ntohs(me->sa.sin_port));
me->lfd = opensock(me->sa);
for (;;) {
int n, nmax;
struct my_sock *s, *nexts, **ps;
struct my_sess *p, *nextp, **pp;
fd_set r, w;
struct timeval to = { 5, 0 };
FD_ZERO(&r);
FD_ZERO(&w);
FD_SET(me->lfd, &r);
nmax = me->lfd;
for (s = me->socks; s; s = s->next) { /* handle sockets */
FD_SET(s->socket, s->reply ? &w : &r);
if (nmax < s->socket)
nmax = s->socket;
}
for (p = me->sess; p; p = p->next) { /* handle terminals */
FD_SET(p->master, &r);
if (nmax < p->master)
nmax = p->master;
if (p->klen) /* have bytes to send to keyboard */
FD_SET(p->master, &w);
}
n = select(nmax + 1, &r, &w, NULL, &to);
if (n == 0) {
fprintf(stderr, "select returns %d\n", n);
continue;
}
if (FD_ISSET(me->lfd, &r))
handle_listen(me);
for (ps = &me->socks, s = *ps; s; s = nexts) { /* scan sockets */
nexts = s->next;
if (FD_ISSET(s->socket, s->reply ? &w : &r))
sock_io(me, s);
if (s->len != 0) { /* socket still active */
ps = &s->next;
} else { /* socket dead, unlink */
*ps = s->next;
free(s);
}
}
for (pp = &me->sess, p = *pp; p ; p = nextp) { /* scan shells */
nextp = p->next;
if (FD_ISSET(p->master, &w))
shell_keyboard(me, p);
if (p->master >= 0 && FD_ISSET(p->master, &r))
shell_screen(me, p);
if (p->master >= 0) { /* session still active */
pp = &p->next;
} else { /* dead session, unlink */
*pp = p->next;
fprintf(stderr, "-- free session %p ---\n", p);
free(p);
}
}
}
return 0;
}
int main(int argc, char *argv[])
{
struct my_args me;
bzero(&me, sizeof(me));
me.sa.sin_family = PF_INET;
me.sa.sin_port = htons(8022);
inet_aton("127.0.0.1", &me.sa.sin_addr);
me.cmd = "login";
for ( ; argc > 1 ; argc--, argv++) {
if (!strcmp(argv[1], "--unsafe")) {
me.unsafe = 1;
continue;
}
if (!strcmp(argv[1], "--verbose")) {
me.verbose = 1;
continue;
}
if (argc < 3)
break;
if (!strcmp(argv[1], "--cmd")) {
me.cmd = argv[2];
argc--; argv++; continue;
}
if (!strcmp(argv[1], "--port")) {
me.sa.sin_port = htons(atoi(argv[2]));
argc--; argv++; continue;
}
if (!strcmp(argv[1], "--addr")) {
struct hostent *h = gethostbyname(argv[2]);
if (h) {
me.sa.sin_addr = *(struct in_addr *)(h->h_addr);
} else if (!inet_aton(argv[1], &me.sa.sin_addr)) {
perror("cannot parse address");
exit(1);
}
argc--; argv++; continue;
}
break;
}
mainloop(&me);
return 0;
}
myts.arm 000755 000423 000000 00000045121 11464701264 013024 0 ustar 00luigi wheel 000000 000000 ELF ( 4 3 4 ( p/ 4 4 4 4 4 4 / / 0 0 0 0 0 0 H H H Qtd /lib/ld-linux.so.3 GNU % 1 , . ( ' ) # " 0 & - * / %
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call_gmon_start $a $d init.c crtstuff.c __JCR_LIST__ __do_global_dtors_aux completed.5877 __do_global_dtors_aux_fini_array_entry frame_dummy __frame_dummy_init_array_entry myts.c C.113.5502 mime_types .divsi3_nodiv0 shift elf-init.c __FRAME_END__ __JCR_END__ _GLOBAL_OFFSET_TABLE_ __init_array_end __init_array_start _DYNAMIC data_start open@@GLIBC_2.4 mmap@@GLIBC_2.4 abort@@GLIBC_2.4 __libc_csu_fini parse_msg strcasestr@@GLIBC_2.4 _start __libc_start_main@@GLIBC_2.4 getmime shell_keyboard inet_ntoa@@GLIBC_2.4 __gmon_start__ _Jv_RegisterClasses _fini strchr@@GLIBC_2.4 listen@@GLIBC_2.4 calloc@@GLIBC_2.4 __aeabi_idiv0 memset@@GLIBC_2.4 execvp@@GLIBC_2.4 perror@@GLIBC_2.4 page_append mainloop _IO_stdin_used free@@GLIBC_2.4 read@@GLIBC_2.4 write@@GLIBC_2.4 __data_start sock_io accept@@GLIBC_2.4 __bss_start__ socket@@GLIBC_2.4 inet_aton@@GLIBC_2.4 __aeabi_ldiv0 strlen@@GLIBC_2.4 sscanf@@GLIBC_2.4 __exidx_end memcpy@@GLIBC_2.4 __divsi3 bcmp@@GLIBC_2.4 __dso_handle strtol@@GLIBC_2.4 strcpy@@GLIBC_2.4 __end__ strncat@@GLIBC_2.4 __libc_csu_init __bss_end__ raise@@GLIBC_2.4 myerr forkpty@@GLIBC_2.4 shutdown@@GLIBC_2.4 bind@@GLIBC_2.4 strstr@@GLIBC_2.4 select@@GLIBC_2.4 close@@GLIBC_2.4 fwrite@@GLIBC_2.4 forkchild __ctype_b_loc@@GLIBC_2.4 __bss_start fprintf@@GLIBC_2.4 _bss_end__ __aeabi_idivmod shell_screen _end unescape handle_listen fcntl@@GLIBC_2.4 stderr@@GLIBC_2.4 munmap@@GLIBC_2.4 __fxstat@@GLIBC_2.4 u_mode index@@GLIBC_2.4 _edata strncmp@@GLIBC_2.4 gethostbyname@@GLIBC_2.4 __exidx_start setsockopt@@GLIBC_2.4 __aeabi_idiv opensock strcmp@@GLIBC_2.4 exit@@GLIBC_2.4 sprintf@@GLIBC_2.4 main _init