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radare2/libr/socket/run.c

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/* radare - LGPL - Copyright 2014-2021 - pancake */
/* this helper api is here because it depends on r_util and r_socket */
/* we should find a better place for it. r_io? */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <r_socket.h>
#include <r_util.h>
#include <r_lib.h>
#include <r_cons.h>
#include <sys/stat.h>
#include <sys/types.h>
#if __APPLE__ && LIBC_HAVE_FORK
#if !__POWERPC__
#include <spawn.h>
#endif
#include <sys/wait.h>
#include <mach/exception_types.h>
#include <mach/mach_init.h>
#include <mach/mach_port.h>
#include <mach/mach_traps.h>
#include <mach/task.h>
#include <mach/task_info.h>
#include <mach/thread_act.h>
#include <mach/thread_info.h>
#include <mach/vm_map.h>
#include <mach-o/loader.h>
#include <mach-o/nlist.h>
#endif
#if __UNIX__
#include <sys/ioctl.h>
#include <sys/resource.h>
#ifndef __wasi__
#include <grp.h>
#endif
#include <errno.h>
#if defined(__sun)
#include <sys/filio.h>
#endif
#if __linux__ && !__ANDROID__
#include <sys/personality.h>
#include <pty.h>
#include <utmp.h>
#endif
#if defined(__APPLE__) || defined(__NetBSD__) || defined(__OpenBSD__)
#include <util.h>
#elif defined(__FreeBSD__) || defined(__DragonFly__)
#include <sys/sysctl.h>
#include <libutil.h>
#endif
#endif
#ifdef _MSC_VER
#include <direct.h> // to compile chdir in msvc windows
#include <process.h> // to compile execv in msvc windows
#define pid_t int
#endif
#if HAVE_PTY
static int (*dyn_openpty)(int *amaster, int *aslave, char *name, struct termios *termp, struct winsize *winp) = NULL;
static int (*dyn_login_tty)(int fd) = NULL;
static id_t (*dyn_forkpty)(int *amaster, char *name, struct termios *termp, struct winsize *winp) = NULL;
static void dyn_init(void) {
if (!dyn_openpty) {
dyn_openpty = r_lib_dl_sym (NULL, "openpty");
}
if (!dyn_login_tty) {
dyn_login_tty = r_lib_dl_sym (NULL, "login_tty");
}
if (!dyn_forkpty) {
dyn_forkpty = r_lib_dl_sym (NULL, "forkpty");
}
#if __UNIX__
// attempt to fall back on libutil if we failed to load anything
if (!(dyn_openpty && dyn_login_tty && dyn_forkpty)) {
void *libutil;
if (!(libutil = r_lib_dl_open ("libutil." R_LIB_EXT))) {
eprintf ("[ERROR] rarun2: Could not find PTY utils, failed to load %s\n", "libutil." R_LIB_EXT);
return;
}
if (!dyn_openpty) {
dyn_openpty = r_lib_dl_sym (libutil, "openpty");
}
if (!dyn_login_tty) {
dyn_login_tty = r_lib_dl_sym (libutil, "login_tty");
}
if (!dyn_forkpty) {
dyn_forkpty = r_lib_dl_sym (libutil, "forkpty");
}
r_lib_dl_close (libutil);
}
#endif
}
#endif
R_API RRunProfile *r_run_new(const char *str) {
RRunProfile *p = R_NEW0 (RRunProfile);
if (p) {
r_run_reset (p);
if (str) {
r_run_parsefile (p, str);
}
}
return p;
}
R_API void r_run_reset(RRunProfile *p) {
r_return_if_fail (p);
memset (p, 0, sizeof (RRunProfile));
p->_aslr = -1;
}
R_API bool r_run_parse(RRunProfile *pf, const char *profile) {
r_return_val_if_fail (pf && profile, false);
char *p, *o, *str = strdup (profile);
if (!str) {
return false;
}
r_str_replace_char (str, '\r',0);
p = str;
while (p) {
if ((o = strchr (p, '\n'))) {
*o++ = 0;
}
r_run_parseline (pf, p);
p = o;
}
free (str);
return true;
}
R_API void r_run_free(RRunProfile *r) {
if (r) {
free (r->_system);
free (r->_program);
free (r->_runlib);
free (r->_runlib_fcn);
free (r->_stdio);
free (r->_stdin);
free (r->_stdout);
free (r->_stderr);
free (r->_chgdir);
free (r->_chroot);
free (r->_libpath);
free (r->_preload);
free (r);
}
}
#if __UNIX__
static void set_limit(int n, int a, ut64 b) {
#ifndef __wasi__
if (n) {
struct rlimit cl = {b, b};
setrlimit (RLIMIT_CORE, &cl);
} else {
struct rlimit cl = {0, 0};
setrlimit (a, &cl);
}
#endif
}
#endif
static char *getstr(const char *src) {
int len;
char *ret = NULL;
switch (*src) {
case '\'':
ret = strdup (src+1);
if (ret) {
len = strlen (ret);
if (len > 0) {
len--;
if (ret[len] == '\'') {
ret[len] = 0;
return ret;
}
eprintf ("Missing \"\n");
}
free (ret);
}
return NULL;
case '"':
ret = strdup (src + 1);
if (ret) {
len = strlen (ret);
if (len > 0) {
len--;
if (ret[len] == '"') {
ret[len] = 0;
r_str_unescape (ret);
return ret;
}
eprintf ("Missing \"\n");
}
free (ret);
}
return NULL;
case '@':
{
char *pat = strchr (src + 1, '@');
if (pat) {
size_t len;
long i, rep;
*pat++ = 0;
rep = strtol (src + 1, NULL, 10);
len = strlen (pat);
if (rep > 0) {
char *buf = malloc (rep);
if (buf) {
for (i = 0; i < rep; i++) {
buf[i] = pat[i % len];
}
}
return buf;
}
}
// slurp file
return r_file_slurp (src + 1, NULL);
}
case '`':
{
char *msg = strdup (src + 1);
int msg_len = strlen (msg);
if (msg_len > 0) {
msg [msg_len - 1] = 0;
char *ret = r_sys_cmd_str (msg, NULL, NULL);
r_str_trim_tail (ret);
free (msg);
return ret;
}
free (msg);
return strdup ("");
}
case '!':
{
char *a = r_sys_cmd_str (src + 1, NULL, NULL);
r_str_trim_tail (a);
return a;
}
case ':':
if (src[1] == '!') {
ret = r_sys_cmd_str (src + 1, NULL, NULL);
r_str_trim_tail (ret); // why no head :?
} else {
ret = strdup (src);
}
len = r_hex_str2bin (src + 1, (ut8*)ret);
if (len > 0) {
ret[len] = 0;
return ret;
}
eprintf ("Invalid hexpair string\n");
free (ret);
return NULL;
}
r_str_unescape ((ret = strdup (src)));
return ret;
}
static int parseBool(const char *e) {
return (strcmp (e, "yes")?
(strcmp (e, "on")?
(strcmp (e, "true")?
(strcmp (e, "1")?
0: 1): 1): 1): 1);
}
// TODO: move into r_util? r_run_... ? with the rest of funcs?
static void setASLR(RRunProfile *r, int enabled) {
#if __linux__
r_sys_aslr (enabled);
#if HAVE_DECL_ADDR_NO_RANDOMIZE && !__ANDROID__
if (personality (ADDR_NO_RANDOMIZE) == -1) {
#endif
r_sys_aslr (0);
#if HAVE_DECL_ADDR_NO_RANDOMIZE && !__ANDROID__
}
#endif
#elif __APPLE__
// TOO OLD setenv ("DYLD_NO_PIE", "1", 1);
// disable this because its
const char *argv0 = r->_system ? r->_system
: r->_program ? r->_program
: r->_args[0] ? r->_args[0]
: "/path/to/exec";
eprintf ("To disable aslr patch mach0.hdr.flags with:\n"
"r2 -qwnc 'wx 000000 @ 0x18' %s\n", argv0);
// f MH_PIE=0x00200000; wB-MH_PIE @ 24\n");
// for osxver>=10.7
// "unset the MH_PIE bit in an already linked executable" with --no-pie flag of the script
// the right way is to disable the aslr bit in the spawn call
#elif __FreeBSD__ || __NetBSD__ || __DragonFly__
r_sys_aslr (enabled);
#else
// not supported for this platform
#endif
}
#if __APPLE__ && !__POWERPC__
#else
#if HAVE_PTY
static void restore_saved_fd(int saved, bool restore, int fd) {
if (saved == -1) {
return;
}
if (restore) {
dup2 (saved, fd);
}
close (saved);
}
#endif
static int handle_redirection_proc(const char *cmd, bool in, bool out, bool err) {
#if HAVE_PTY
if (!dyn_forkpty) {
// No forkpty api found, maybe we should fallback to just fork without any pty allocated
return -1;
}
// use PTY to redirect I/O because pipes can be problematic in
// case of interactive programs.
int saved_stdin = dup (STDIN_FILENO);
if (saved_stdin == -1) {
return -1;
}
int saved_stdout = dup (STDOUT_FILENO);
if (saved_stdout == -1) {
close (saved_stdin);
return -1;
}
int fdm, pid = dyn_forkpty (&fdm, NULL, NULL, NULL);
if (pid == -1) {
close (saved_stdin);
close (saved_stdout);
return -1;
}
const char *tn = ttyname (fdm);
if (!tn) {
close (saved_stdin);
close (saved_stdout);
return -1;
}
int fds = open (tn, O_RDWR);
if (fds == -1) {
close (saved_stdin);
close (saved_stdout);
return -1;
}
if (pid == 0) {
close (fdm);
// child process
if (in) {
dup2 (fds, STDIN_FILENO);
}
if (out) {
dup2 (fds, STDOUT_FILENO);
}
// child - program to run
// necessary because otherwise you can read the same thing you
// wrote on fdm.
struct termios t;
tcgetattr (fds, &t);
cfmakeraw (&t);
tcsetattr (fds, TCSANOW, &t);
int code = r_sys_cmd (cmd);
restore_saved_fd (saved_stdin, in, STDIN_FILENO);
restore_saved_fd (saved_stdout, out, STDOUT_FILENO);
exit (code);
} else {
close (fds);
if (in) {
dup2 (fdm, STDIN_FILENO);
}
if (out) {
dup2 (fdm, STDOUT_FILENO);
}
// parent process
int status;
waitpid (pid, &status, 0);
}
// parent
close (saved_stdin);
close (saved_stdout);
return 0;
#else
#ifdef _MSC_VER
#pragma message ("TODO: handle_redirection_proc: Not implemented for this platform")
#else
#warning handle_redirection_proc : unimplemented for this platform
#endif
return -1;
#endif
}
#endif
static int handle_redirection(const char *cmd, bool in, bool out, bool err) {
#if __APPLE__ && !__POWERPC__
//XXX handle this in other layer since things changes a little bit
//this seems like a really good place to refactor stuff
return 0;
#else
if (!cmd || !*cmd) {
return 0;
}
if (cmd[0] == '"') {
#ifdef __wasi__
eprintf ("[ERROR] rarun2: Cannot create pipe\n");
#elif __UNIX__
if (in) {
int pipes[2];
if (pipe (pipes) != -1) {
size_t cmdl = strlen (cmd)-2;
if (write (pipes[1], cmd + 1, cmdl) != cmdl) {
eprintf ("[ERROR] rarun2: Cannot write to the pipe\n");
close (0);
return 1;
}
if (write (pipes[1], "\n", 1) != 1) {
eprintf ("[ERROR] rarun2: Cannot write to the pipe\n");
close (0);
return 1;
}
close (0);
dup2 (pipes[0], 0);
} else {
eprintf ("[ERROR] rarun2: Cannot create pipe\n");
}
}
#else
#ifdef _MSC_VER
#pragma message ("string redirection handle not yet done")
#else
#warning quoted string redirection handle not yet done
#endif
#endif
} else if (cmd[0] == '!') {
// redirection to a process
return handle_redirection_proc (cmd + 1, in, out, err);
} else {
// redirection to a file
int f, flag = 0, mode = 0;
flag |= in ? O_RDONLY : 0;
flag |= out ? O_WRONLY | O_CREAT : 0;
flag |= err ? O_WRONLY | O_CREAT : 0;
#ifdef __WINDOWS__
mode = _S_IREAD | _S_IWRITE;
#else
mode = S_IRUSR | S_IWUSR;
#endif
f = open (cmd, flag, mode);
if (f < 0) {
eprintf ("[ERROR] rarun2: Cannot open: %s\n", cmd);
return 1;
}
#ifndef __wasi__
#define DUP(x) { close(x); dup2(f,x); }
if (in) {
DUP(0);
}
if (out) {
DUP(1);
}
if (err) {
DUP(2);
}
#endif
close (f);
}
return 0;
#endif
}
R_API bool r_run_parsefile(RRunProfile *p, const char *b) {
r_return_val_if_fail (p && b, false);
char *s = r_file_slurp (b, NULL);
if (s) {
bool ret = r_run_parse (p, s);
free (s);
return ret;
}
return 0;
}
R_API bool r_run_parseline(RRunProfile *p, const char *b) {
int must_free = false;
char *e = strchr (b, '=');
if (!e || *b == '#') {
return 0;
}
*e++ = 0;
if (*e == '$') {
must_free = true;
e = r_sys_getenv (e);
}
if (!e) {
return 0;
}
if (!strcmp (b, "program")) {
p->_args[0] = p->_program = strdup (e);
} else if (!strcmp (b, "daemon")) {
p->_daemon = true;
} else if (!strcmp (b, "system")) {
p->_system = strdup (e);
} else if (!strcmp (b, "runlib")) {
p->_runlib = strdup (e);
} else if (!strcmp (b, "runlib.fcn")) {
p->_runlib_fcn = strdup (e);
} else if (!strcmp (b, "aslr")) {
p->_aslr = parseBool (e);
} else if (!strcmp (b, "pid")) {
p->_pid = atoi (e);
} else if (!strcmp (b, "pidfile")) {
p->_pidfile = strdup (e);
} else if (!strcmp (b, "connect")) {
p->_connect = strdup (e);
} else if (!strcmp (b, "listen")) {
p->_listen = strdup (e);
} else if (!strcmp (b, "pty")) {
p->_pty = parseBool (e);
} else if (!strcmp (b, "stdio")) {
if (e[0] == '!') {
p->_stdio = strdup (e);
} else {
p->_stdout = strdup (e);
p->_stderr = strdup (e);
p->_stdin = strdup (e);
}
} else if (!strcmp (b, "stdout")) {
p->_stdout = strdup (e);
} else if (!strcmp (b, "stdin")) {
p->_stdin = strdup (e);
} else if (!strcmp (b, "stderr")) {
p->_stderr = strdup (e);
} else if (!strcmp (b, "input")) {
p->_input = strdup (e);
} else if (!strcmp (b, "chdir")) {
p->_chgdir = strdup (e);
} else if (!strcmp (b, "core")) {
p->_docore = parseBool (e);
} else if (!strcmp (b, "fork")) {
p->_dofork = parseBool (e);
} else if (!strcmp (b, "sleep")) {
p->_r2sleep = atoi (e);
} else if (!strcmp (b, "maxstack")) {
p->_maxstack = atoi (e);
} else if (!strcmp (b, "maxproc")) {
p->_maxproc = atoi (e);
} else if (!strcmp (b, "maxfd")) {
p->_maxfd = atoi (e);
} else if (!strcmp (b, "bits")) {
p->_bits = atoi (e);
} else if (!strcmp (b, "chroot")) {
p->_chroot = strdup (e);
} else if (!strcmp (b, "libpath")) {
p->_libpath = strdup (e);
} else if (!strcmp (b, "preload")) {
p->_preload = strdup (e);
} else if (!strcmp (b, "r2preload")) {
p->_r2preload = parseBool (e);
} else if (!strcmp (b, "r2preweb")) {
r_sys_setenv ("RARUN2_WEB", "yes");
} else if (!strcmp (b, "setuid")) {
p->_setuid = strdup (e);
} else if (!strcmp (b, "seteuid")) {
p->_seteuid = strdup (e);
} else if (!strcmp (b, "setgid")) {
p->_setgid = strdup (e);
} else if (!strcmp (b, "setegid")) {
p->_setegid = strdup (e);
} else if (!strcmp (b, "nice")) {
p->_nice = atoi (e);
} else if (!strcmp (b, "timeout")) {
p->_timeout = atoi (e);
} else if (!strcmp (b, "timeoutsig")) {
p->_timeout_sig = r_signal_from_string (e);
} else if (!memcmp (b, "arg", 3)) {
int n = atoi (b + 3);
if (n >= 0 && n < R_RUN_PROFILE_NARGS) {
p->_args[n] = getstr (e);
p->_argc++;
} else {
eprintf ("Out of bounds args index: %d\n", n);
}
} else if (!strcmp (b, "envfile")) {
char *p, buf[1024];
size_t len;
FILE *fd = r_sandbox_fopen (e, "r");
if (!fd) {
eprintf ("Cannot open '%s'\n", e);
if (must_free == true) {
free (e);
}
return false;
}
for (;;) {
if (!fgets (buf, sizeof (buf), fd)) {
break;
}
if (feof (fd)) {
break;
}
p = strchr (buf, '=');
if (p) {
*p++ = 0;
len = strlen (p);
if (len > 0 && p[len - 1] == '\n') {
p[len - 1] = 0;
}
if (len > 1 && p[len - 2] == '\r') {
p[len - 2] = 0;
}
r_sys_setenv (buf, p);
}
}
fclose (fd);
} else if (!strcmp (b, "unsetenv")) {
r_sys_setenv (e, NULL);
} else if (!strcmp (b, "setenv")) {
char *V, *v = strchr (e, '=');
if (v) {
*v++ = 0;
V = getstr (v);
r_sys_setenv (e, V);
free (V);
}
} else if (!strcmp(b, "clearenv")) {
r_sys_clearenv ();
}
if (must_free == true) {
free (e);
}
return true;
}
R_API const char *r_run_help(void) {
return
"program=/bin/ls\n"
"arg1=/bin\n"
"# arg2=hello\n"
"# arg3=\"hello\\nworld\"\n"
"# arg4=:048490184058104849\n"
"# arg5=:!ragg2 -p n50 -d 10:0x8048123\n"
"# arg6=@arg.txt\n"
"# arg7=@300@ABCD # 300 chars filled with ABCD pattern\n"
"# system=r2 -\n"
"# daemon=false\n"
"# aslr=no\n"
"setenv=FOO=BAR\n"
"# unsetenv=FOO\n"
"# clearenv=true\n"
"# envfile=environ.txt\n"
"timeout=3\n"
"# timeoutsig=SIGTERM # or 15\n"
"# connect=localhost:8080\n"
"# listen=8080\n"
"# pty=false\n"
"# fork=true\n"
"# bits=32\n"
"# pid=0\n"
"# pidfile=/tmp/foo.pid\n"
"# #sleep=0\n"
"# #maxfd=0\n"
"# #execve=false\n"
"# #maxproc=0\n"
"# #maxstack=0\n"
"# #core=false\n"
"# #stdio=blah.txt\n"
"# #stderr=foo.txt\n"
"# stdout=foo.txt\n"
"# stdin=input.txt # or !program to redirect input from another program\n"
"# input=input.txt\n"
"# chdir=/\n"
"# chroot=/mnt/chroot\n"
"# libpath=$PWD:/tmp/lib\n"
"# r2preload=yes\n"
"# preload=/lib/libfoo.so\n"
"# setuid=2000\n"
"# seteuid=2000\n"
"# setgid=2001\n"
"# setegid=2001\n"
"# nice=5\n";
}
#if HAVE_PTY
static int fd_forward(int in_fd, int out_fd, char **buff) {
int size = 0;
if (ioctl (in_fd, FIONREAD, &size) == -1) {
perror ("ioctl");
return -1;
}
if (!size) { // child process exited or socket is closed
return -1;
}
char *new_buff = realloc (*buff, size);
if (!new_buff) {
eprintf ("Failed to allocate buffer for redirection");
return -1;
}
*buff = new_buff;
if (read (in_fd, *buff, size) != size) {
perror ("read");
return -1;
}
if (write (out_fd, *buff, size) != size) {
perror ("write");
return -1;
}
return 0;
}
#endif
static int redirect_socket_to_stdio(RSocket *sock) {
close (0);
close (1);
close (2);
#ifndef __wasi__
dup2 (sock->fd, 0);
dup2 (sock->fd, 1);
dup2 (sock->fd, 2);
#endif
return 0;
}
#if __WINDOWS__
static RThreadFunctionRet exit_process(RThread *th) {
// eprintf ("\nrarun2: Interrupted by timeout\n");
exit (0);
}
#endif
static int redirect_socket_to_pty(RSocket *sock) {
#if HAVE_PTY
// directly duplicating the fds using dup2() creates problems
// in case of interactive applications
int fdm = -1, fds = -1;
if (dyn_openpty && dyn_openpty (&fdm, &fds, NULL, NULL, NULL) == -1) {
perror ("opening pty");
return -1;
}
pid_t child_pid = r_sys_fork ();
if (child_pid == -1) {
eprintf ("cannot fork\n");
if (fdm != -1) {
close (fdm);
}
if (fds != -1) {
close (fds);
}
return -1;
}
if (child_pid == 0) {
// child process
close (fds);
char *buff = NULL;
int sockfd = sock->fd;
int max_fd = fdm > sockfd ? fdm : sockfd;
while (true) {
fd_set readfds;
FD_ZERO (&readfds);
FD_SET (fdm, &readfds);
FD_SET (sockfd, &readfds);
if (select (max_fd + 1, &readfds, NULL, NULL, NULL) == -1) {
perror ("select error");
break;
}
if (FD_ISSET (fdm, &readfds)) {
if (fd_forward (fdm, sockfd, &buff) != 0) {
break;
}
}
if (FD_ISSET (sockfd, &readfds)) {
if (fd_forward (sockfd, fdm, &buff) != 0) {
break;
}
}
}
free (buff);
if (fdm != -1) {
close (fdm);
fdm = -1;
}
r_socket_free (sock);
exit (0);
}
// parent
r_socket_close_fd (sock);
if (dyn_login_tty) {
dyn_login_tty (fds);
}
if (fdm != -1) {
close (fdm);
}
// disable the echo on slave stdin
struct termios t;
tcgetattr (0, &t);
cfmakeraw (&t);
tcsetattr (0, TCSANOW, &t);
return 0;
#else
// Fallback to socket to I/O redirection
return redirect_socket_to_stdio (sock);
#endif
}
R_API int r_run_config_env(RRunProfile *p) {
int ret;
#if HAVE_PTY
dyn_init ();
#endif
if (!p->_program && !p->_system && !p->_runlib) {
eprintf ("No program, system or runlib rule defined\n");
return 1;
}
// when IO is redirected to a process, handle them together
if (handle_redirection (p->_stdio, true, true, false) != 0) {
return 1;
}
if (handle_redirection (p->_stdin, true, false, false) != 0) {
return 1;
}
if (handle_redirection (p->_stdout, false, true, false) != 0) {
return 1;
}
if (handle_redirection (p->_stderr, false, false, true) != 0) {
return 1;
}
if (p->_aslr != -1) {
setASLR (p, p->_aslr);
}
#if __UNIX__ && !__wasi__ && !defined(serenity)
set_limit (p->_docore, RLIMIT_CORE, RLIM_INFINITY);
if (p->_maxfd) {
set_limit (p->_maxfd, RLIMIT_NOFILE, p->_maxfd);
}
#ifdef RLIMIT_NPROC
if (p->_maxproc) {
set_limit (p->_maxproc, RLIMIT_NPROC, p->_maxproc);
}
#endif
if (p->_maxstack) {
set_limit (p->_maxstack, RLIMIT_STACK, p->_maxstack);
}
#else
if (p->_docore || p->_maxfd || p->_maxproc || p->_maxstack)
eprintf ("Warning: setrlimits not supported for this platform\n");
#endif
if (p->_connect) {
char *q = strchr (p->_connect, ':');
if (q) {
RSocket *fd = r_socket_new (0);
*q = 0;
if (!r_socket_connect_tcp (fd, p->_connect, q+1, 30)) {
eprintf ("Cannot connect\n");
r_socket_free (fd);
return 1;
}
if (p->_pty) {
if (redirect_socket_to_pty (fd) != 0) {
eprintf ("socket redirection failed\n");
r_socket_free (fd);
return 1;
}
} else {
redirect_socket_to_stdio (fd);
}
} else {
eprintf ("Invalid format for connect. missing ':'\n");
return 1;
}
}
if (p->_listen) {
RSocket *child, *fd = r_socket_new (0);
bool is_child = false;
if (!r_socket_listen (fd, p->_listen, NULL)) {
eprintf ("rarun2: cannot listen\n");
r_socket_free (fd);
return 1;
}
while (true) {
child = r_socket_accept (fd);
if (child) {
is_child = true;
if (p->_dofork && !p->_dodebug) {
pid_t child_pid = r_sys_fork ();
if (child_pid == -1) {
eprintf("rarun2: cannot fork\n");
r_socket_free (child);
r_socket_free (fd);
return 1;
} else if (child_pid != 0){
// parent code
is_child = false;
}
}
if (is_child) {
r_socket_close_fd (fd);
eprintf ("connected\n");
if (p->_pty) {
if (redirect_socket_to_pty (child) != 0) {
eprintf ("socket redirection failed\n");
r_socket_free (child);
r_socket_free (fd);
return 1;
}
} else {
redirect_socket_to_stdio (child);
}
break;
} else {
r_socket_close_fd (child);
}
}
}
if (!is_child) {
r_socket_free (child);
}
r_socket_free (fd);
}
if (p->_r2sleep != 0) {
r_sys_sleep (p->_r2sleep);
}
#if __UNIX__ && !__wasi__
if (p->_chroot) {
if (chdir (p->_chroot) == -1) {
eprintf ("Cannot chdir to chroot in %s\n", p->_chroot);
return 1;
} else {
if (chroot (".") == -1) {
eprintf ("Cannot chroot to %s\n", p->_chroot);
return 1;
} else {
// Silenting pedantic meson flags...
if (chdir ("/") == -1) {
eprintf ("Cannot chdir to /\n");
return 1;
}
if (p->_chgdir) {
if (chdir (p->_chgdir) == -1) {
eprintf ("Cannot chdir after chroot to %s\n", p->_chgdir);
return 1;
}
}
}
}
} else if (p->_chgdir) {
if (chdir (p->_chgdir) == -1) {
eprintf ("Cannot chdir after chroot to %s\n", p->_chgdir);
return 1;
}
}
#else
if (p->_chgdir) {
ret = chdir (p->_chgdir);
if (ret < 0) {
return 1;
}
}
if (p->_chroot) {
ret = chdir (p->_chroot);
if (ret < 0) {
return 1;
}
}
#endif
#if __UNIX__ && !__wasi__
if (p->_setuid) {
ret = setgroups (0, NULL);
if (ret < 0) {
return 1;
}
ret = setuid (atoi (p->_setuid));
if (ret < 0) {
return 1;
}
}
if (p->_seteuid) {
ret = seteuid (atoi (p->_seteuid));
if (ret < 0) {
return 1;
}
}
if (p->_setgid) {
#if __wasi__
ret = 0;
#else
ret = setgid (atoi (p->_setgid));
#endif
if (ret < 0) {
return 1;
}
}
if (p->_input) {
char *inp;
int f2[2];
if (pipe (f2) != -1) {
close (0);
#if !__wasi__
dup2 (f2[0], 0);
#endif
} else {
eprintf ("[ERROR] rarun2: Cannot create pipe\n");
return 1;
}
inp = getstr (p->_input);
if (inp) {
size_t inpl = strlen (inp);
if (write (f2[1], inp, inpl) != inpl) {
eprintf ("[ERROR] rarun2: Cannot write to the pipe\n");
}
close (f2[1]);
free (inp);
} else {
eprintf ("Invalid input\n");
}
}
#endif
if (p->_r2preload) {
if (p->_preload) {
eprintf ("Warning: Only one library can be opened at a time\n");
}
#ifdef __WINDOWS__
p->_preload = r_str_r2_prefix (R_JOIN_2_PATHS (R2_LIBDIR, "libr2."R_LIB_EXT));
#else
p->_preload = strdup (R2_LIBDIR"/libr2."R_LIB_EXT);
#endif
}
if (p->_libpath) {
#if __WINDOWS__
eprintf ("rarun2: libpath unsupported for this platform\n");
#elif __HAIKU__
char *orig = r_sys_getenv ("LIBRARY_PATH");
char *newlib = r_str_newf ("%s:%s", p->_libpath, orig);
r_sys_setenv ("LIBRARY_PATH", newlib);
free (newlib);
free (orig);
#elif __APPLE__
r_sys_setenv ("DYLD_LIBRARY_PATH", p->_libpath);
#else
r_sys_setenv ("LD_LIBRARY_PATH", p->_libpath);
#endif
}
if (p->_preload) {
#if __APPLE__
// 10.6
#ifndef __MAC_10_7
r_sys_setenv ("DYLD_PRELOAD", p->_preload);
#endif
r_sys_setenv ("DYLD_INSERT_LIBRARIES", p->_preload);
// 10.8
r_sys_setenv ("DYLD_FORCE_FLAT_NAMESPACE", "1");
#else
r_sys_setenv ("LD_PRELOAD", p->_preload);
#endif
}
if (p->_timeout) {
#if __wasi__
// do nothing
#elif __UNIX__
int mypid = r_sys_getpid ();
if (!r_sys_fork ()) {
int use_signal = p->_timeout_sig;
if (use_signal < 1) {
use_signal = SIGKILL;
}
sleep (p->_timeout);
if (!kill (mypid, 0)) {
// eprintf ("\nrarun2: Interrupted by timeout\n");
}
kill (mypid, use_signal);
exit (0);
}
#else
if (p->_timeout_sig < 1 || p->_timeout_sig == 9) {
r_th_new (exit_process, NULL, p->_timeout);
} else {
eprintf ("timeout with signal not supported for this platform\n");
}
#endif
}
return 0;
}
// NOTE: return value is like in unix return code (0 = ok, 1 = not ok)
R_API int r_run_start(RRunProfile *p) {
#if LIBC_HAVE_FORK
if (p->_execve) {
exit (execv (p->_program, (char* const*)p->_args));
}
#endif
#if __APPLE__ && !__POWERPC__ && LIBC_HAVE_FORK
posix_spawnattr_t attr = {0};
pid_t pid = -1;
int ret;
posix_spawnattr_init (&attr);
if (p->_args[0]) {
char **envp = r_sys_get_environ();
ut32 spflags = 0; //POSIX_SPAWN_START_SUSPENDED;
spflags |= POSIX_SPAWN_SETEXEC;
if (p->_aslr == 0) {
#define _POSIX_SPAWN_DISABLE_ASLR 0x0100
spflags |= _POSIX_SPAWN_DISABLE_ASLR;
}
(void)posix_spawnattr_setflags (&attr, spflags);
if (p->_bits) {
size_t copied = 1;
cpu_type_t cpu;
#if __i386__ || __x86_64__
cpu = CPU_TYPE_I386;
if (p->_bits == 64) {
cpu |= CPU_ARCH_ABI64;
}
#else
cpu = CPU_TYPE_ANY;
#endif
posix_spawnattr_setbinpref_np (
&attr, 1, &cpu, &copied);
}
ret = posix_spawnp (&pid, p->_args[0],
NULL, &attr, p->_args, envp);
switch (ret) {
case 0:
break;
case 22:
eprintf ("posix_spawnp: Invalid argument\n");
break;
case 86:
eprintf ("posix_spawnp: Unsupported architecture\n");
break;
default:
eprintf ("posix_spawnp: unknown error %d\n", ret);
perror ("posix_spawnp");
break;
}
exit (ret);
}
#endif
if (p->_system) {
if (p->_pid) {
eprintf ("PID: Cannot determine pid with 'system' directive. Use 'program'.\n");
}
if (p->_daemon) {
#if __WINDOWS__
// eprintf ("PID: Cannot determine pid with 'system' directive. Use 'program'.\n");
#else
pid_t child = r_sys_fork ();
if (child == -1) {
perror ("fork");
exit (1);
}
if (child) {
if (p->_pidfile) {
char pidstr[32];
snprintf (pidstr, sizeof (pidstr), "%d\n", child);
r_file_dump (p->_pidfile,
(const ut8*)pidstr,
strlen (pidstr), 0);
}
exit (0);
}
#if !__wasi__
setsid ();
#endif
if (p->_timeout) {
#if __UNIX__
int mypid = r_sys_getpid ();
if (!r_sys_fork ()) {
int use_signal = p->_timeout_sig;
if (use_signal < 1) {
use_signal = SIGKILL;
}
sleep (p->_timeout);
#if !__wasi__
if (!kill (mypid, 0)) {
// eprintf ("\nrarun2: Interrupted by timeout\n");
}
kill (mypid, use_signal);
#endif
exit (0);
}
#else
eprintf ("timeout not supported for this platform\n");
#endif
}
#endif
#if __UNIX__ && !__wasi__
close (0);
close (1);
char *bin_sh = r_file_binsh ();
if (bin_sh) {
exit (execl (bin_sh, bin_sh, "-c", p->_system, NULL));
} else {
exit (r_sys_cmd (p->_system));
}
free (bin_sh);
#else
exit (r_sys_cmd (p->_system));
#endif
} else {
if (p->_pidfile) {
eprintf ("Warning: pidfile doesnt work with 'system'.\n");
}
exit (r_sys_cmd (p->_system));
}
}
if (p->_program) {
if (!r_file_exists (p->_program)) {
char *progpath = r_file_path (p->_program);
if (progpath && *progpath) {
free (p->_program);
p->_program = progpath;
} else {
free (progpath);
eprintf ("rarun2: %s: file not found\n", p->_program);
return 1;
}
}
#if __UNIX__
// XXX HACK close all non-tty fds
{ int i;
for (i = 3; i < 1024; i++) {
close (i);
}
}
// TODO: use posix_spawn
if (p->_setgid) {
#if __wasi__
int ret = -1;
#else
int ret = setgid (atoi (p->_setgid));
#endif
if (ret < 0) {
return 1;
}
}
if (p->_pid) {
eprintf ("PID: %d\n", r_sys_getpid ());
}
if (p->_pidfile) {
char pidstr[32];
snprintf (pidstr, sizeof (pidstr), "%d\n", r_sys_getpid ());
r_file_dump (p->_pidfile,
(const ut8*)pidstr,
strlen (pidstr), 0);
}
#endif
if (p->_nice) {
#if __UNIX__ && !defined(__HAIKU__) && !defined(__serenity__) && !__wasi__
if (nice (p->_nice) == -1) {
return 1;
}
#else
eprintf ("nice not supported for this platform\n");
#endif
}
if (p->_daemon) {
#if __WINDOWS__
eprintf ("PID: Cannot determine pid with 'system' directive. Use 'program'.\n");
#else
pid_t child = r_sys_fork ();
if (child == -1) {
perror ("fork");
exit (1);
}
if (child) {
if (p->_pidfile) {
char pidstr[32];
snprintf (pidstr, sizeof (pidstr), "%d\n", child);
r_file_dump (p->_pidfile,
(const ut8*)pidstr,
strlen (pidstr), 0);
exit (0);
}
}
#if !__wasi__
setsid ();
#if !LIBC_HAVE_FORK
exit (execv (p->_program, (char* const*)p->_args));
#endif
#endif
#endif
}
// TODO: must be HAVE_EXECVE
#if LIBC_HAVE_FORK
exit (execv (p->_program, (char* const*)p->_args));
#endif
}
if (p->_runlib) {
if (!p->_runlib_fcn) {
eprintf ("No function specified. Please set runlib.fcn\n");
return 1;
}
void *addr = r_lib_dl_open (p->_runlib);
if (!addr) {
eprintf ("Could not load the library '%s'\n", p->_runlib);
return 1;
}
void (*fcn)(void) = r_lib_dl_sym (addr, p->_runlib_fcn);
if (!fcn) {
eprintf ("Could not find the function '%s'\n", p->_runlib_fcn);
return 1;
}
switch (p->_argc) {
case 0:
fcn ();
break;
case 1:
r_run_call1 (fcn, p->_args[1]);
break;
case 2:
r_run_call2 (fcn, p->_args[1], p->_args[2]);
break;
case 3:
r_run_call3 (fcn, p->_args[1], p->_args[2], p->_args[3]);
break;
case 4:
r_run_call4 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4]);
break;
case 5:
r_run_call5 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4],
p->_args[5]);
break;
case 6:
r_run_call6 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4],
p->_args[5], p->_args[6]);
break;
case 7:
r_run_call7 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4],
p->_args[5], p->_args[6], p->_args[7]);
break;
case 8:
r_run_call8 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4],
p->_args[5], p->_args[6], p->_args[7], p->_args[8]);
break;
case 9:
r_run_call9 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4],
p->_args[5], p->_args[6], p->_args[7], p->_args[8], p->_args[9]);
break;
case 10:
r_run_call10 (fcn, p->_args[1], p->_args[2], p->_args[3], p->_args[4],
p->_args[5], p->_args[6], p->_args[7], p->_args[8], p->_args[9], p->_args[10]);
break;
default:
eprintf ("Too many arguments.\n");
return 1;
}
r_lib_dl_close (addr);
}
return 0;
}
R_API char *r_run_get_environ_profile(char **env) {
if (!env) {
return NULL;
}
RStrBuf *sb = r_strbuf_new (NULL);
while (*env) {
char *k = strdup (*env);
char *v = strchr (k, '=');
if (v) {
*v++ = 0;
v = r_str_escape_latin1 (v, false, true, true);
if (v) {
r_strbuf_appendf (sb, "setenv=%s=\"%s\"\n", k, v);
free (v);
}
}
free (k);
env++;
}
return r_strbuf_drain (sb);
}
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