static void parseline (char *b) {
char *e = strchr (b, '=');
if (!e) return;
if (*b=='#') return;
*e++ = 0;
if (*e=='$') e = r_sys_getenv (e);
if (e == NULL) return;
if (!strcmp (b, "program")) _args[0] = _program = strdup (e);
else if (!strcmp (b, "connect")) _connect = strdup (e);
else if (!strcmp (b, "listen")) _listen = strdup (e);
else if (!strcmp (b, "stdout")) _stdout = strdup (e);
else if (!strcmp (b, "stdin")) _stdin = strdup (e);
else if (!strcmp (b, "input")) _input = strdup (e);
else if (!strcmp (b, "chdir")) _chgdir = strdup (e);
else if (!strcmp (b, "chroot")) _chroot = strdup (e);
else if (!strcmp (b, "preload")) _preload = strdup (e);
else if (!strcmp (b, "setuid")) _setuid = strdup (e);
else if (!strcmp (b, "seteuid")) _seteuid = strdup (e);
else if (!strcmp (b, "setgid")) _setgid = strdup (e);
else if (!strcmp (b, "setegid")) _setegid = strdup (e);
else if (!memcmp (b, "arg", 3)) {
int n = atoi (b+3);
if (n>=0 && n<NARGS) {
_args[n] = strdup (e);
r_str_escape (_args[n]);
} else eprintf ("Out of bounds args index: %d\n", n);
} else if (!strcmp (b, "timeout")) _timeout = atoi (e);
else if (!strcmp (b, "setenv")) {
char *v = strchr (e, '=');
if (v) {
*v++ = 0;
r_sys_setenv (e, v);
}
}
}
/* Print out the JSON body for memory maps in the passed map region */
static void print_debug_map_json(RDebug *dbg, RDebugMap *map, bool prefix_comma) {
dbg->cb_printf ("%s{", prefix_comma ? ",": "");
if (map->name && *map->name) {
char *escaped_name = r_str_escape (map->name);
dbg->cb_printf ("\"name\":\"%s\",", escaped_name);
free (escaped_name);
}
if (map->file && *map->file) {
char *escaped_path = r_str_escape (map->file);
dbg->cb_printf ("\"file\":\"%s\",", escaped_path);
free (escaped_path);
}
dbg->cb_printf ("\"addr\":%"PFMT64u",", map->addr);
dbg->cb_printf ("\"addr_end\":%"PFMT64u",", map->addr_end);
dbg->cb_printf ("\"type\":\"%c\",", map->user?'u':'s');
dbg->cb_printf ("\"perm\":\"%s\"", r_str_rwx_i (map->perm));
dbg->cb_printf ("}");
}
static void printmetaitem(RAnal *a, RAnalMetaItem *d, int rad) {
char *pstr, *str = r_str_escape (d->str);
if (str) {
if (d->type=='s' && !*str) {
free (str);
return;
}
if (d->type != 'C') {
r_name_filter (str, 0);
pstr = str;
} else pstr = d->str;
// r_str_sanitize (str);
switch (rad) {
case 'j':
a->printf ("{\"offset\":%"PFMT64d", \"type\":\"%s\", \"name\":\"%s\"}",
d->from, r_meta_type_to_string (d->type), str);
break;
case 0:
a->printf ("0x%08"PFMT64x" %s\n",
d->from, str);
case 1:
case '*':
default:
if (d->type == 'C') {
a->printf ("\"%s %s\" @ 0x%08"PFMT64x"\n",
r_meta_type_to_string (d->type), pstr, d->from);
} else {
a->printf ("%s %d 0x%08"PFMT64x" # %s\n",
r_meta_type_to_string (d->type),
d->size, d->from, pstr);
}
break;
}
free (str);
}
}
R_API int r_sys_cmd_str_full(const char *cmd, const char *input, char **output, int *len, char **sterr) {
char buffer[1024], *outputptr = NULL;
char *inputptr = (char *)input;
int pid, bytes = 0, status;
int sh_in[2], sh_out[2], sh_err[2];
if (len) *len = 0;
if (pipe (sh_in))
return R_FALSE;
if (output) {
if (pipe (sh_out)) {
close (sh_in[0]);
close (sh_in[1]);
close (sh_out[0]);
close (sh_out[1]);
return R_FALSE;
}
}
if (pipe (sh_err)) {
close (sh_in[0]);
close (sh_in[1]);
return R_FALSE;
}
switch ((pid=fork ())) {
case -1:
return R_FALSE;
case 0:
dup2 (sh_in[0], 0); close (sh_in[0]); close (sh_in[1]);
if (output) { dup2 (sh_out[1], 1); close (sh_out[0]); close (sh_out[1]); }
if (sterr) dup2 (sh_err[1], 2); else close (2);
close (sh_err[0]); close (sh_err[1]);
exit (r_sandbox_system (cmd, 0));
default:
outputptr = strdup ("");
if (!outputptr)
return R_FALSE;
if (sterr) {
*sterr = strdup ("");
if (!*sterr) {
free (outputptr);
return R_FALSE;
}
}
if (output) close (sh_out[1]);
close (sh_err[1]);
close (sh_in[0]);
if (!inputptr || !*inputptr)
close (sh_in[1]);
for (;;) {
fd_set rfds, wfds;
int nfd;
FD_ZERO (&rfds);
FD_ZERO (&wfds);
if (output)
FD_SET (sh_out[0], &rfds);
if (sterr)
FD_SET (sh_err[0], &rfds);
if (inputptr && *inputptr)
FD_SET (sh_in[1], &wfds);
memset (buffer, 0, sizeof (buffer));
nfd = select (sh_err[0] + 1, &rfds, &wfds, NULL, NULL);
if (nfd < 0)
break;
if (output && FD_ISSET (sh_out[0], &rfds)) {
if ((bytes = read (sh_out[0], buffer, sizeof (buffer)-1)) == 0) break;
buffer[sizeof(buffer) - 1] = '\0';
if (len) *len += bytes;
outputptr = r_str_concat (outputptr, buffer);
} else if (FD_ISSET (sh_err[0], &rfds) && sterr) {
if (read (sh_err[0], buffer, sizeof (buffer)-1) == 0) break;
buffer[sizeof(buffer) - 1] = '\0';
*sterr = r_str_concat (*sterr, buffer);
} else if (FD_ISSET (sh_in[1], &wfds) && inputptr && *inputptr) {
bytes = write (sh_in[1], inputptr, strlen (inputptr));
inputptr += bytes;
if (!*inputptr) {
close (sh_in[1]);
/* If neither stdout nor stderr should be captured,
* abort now - nothing more to do for select(). */
if (!output && !sterr) break;
}
}
}
if (output)
close (sh_out[0]);
close (sh_err[0]);
close (sh_in[1]);
waitpid (pid, &status, 0);
if (status != 0) {
char *escmd = r_str_escape (cmd);
eprintf ("%s: failed command '%s'\n", __func__, escmd);
free (escmd);
return R_FALSE;
}
if (output) *output = outputptr;
else free (outputptr);
return R_TRUE;
}
return R_FALSE;
}
/* TODO: simplify using r_write */
static int cmd_write(void *data, const char *input) {
ut64 off;
ut8 *buf;
const char *arg;
int wseek, i, size, len = strlen (input);
char *tmp, *str, *ostr;
RCore *core = (RCore *)data;
#define WSEEK(x,y) if(wseek)r_core_seek_delta(x,y)
wseek = r_config_get_i (core->config, "cfg.wseek");
str = ostr = strdup (input+1);
switch (*input) {
case 'p':
if (input[1]==' ' && input[2]) {
r_core_patch (core, input+2);
} else {
eprintf ("Usage: wp [rapatch-file]\n"
"TODO: rapatch format documentation here\n");
}
break;
case 'r':
off = r_num_math (core->num, input+1);
len = (int)off;
if (len>0) {
buf = malloc (len);
if (buf != NULL) {
r_num_irand ();
for (i=0; i<len; i++)
buf[i] = r_num_rand (256);
r_core_write_at (core, core->offset, buf, len);
WSEEK (core, len);
free (buf);
} else eprintf ("Cannot allocate %d bytes\n", len);
}
break;
case 'A':
switch (input[1]) {
case ' ':
if (input[2] && input[3]==' ') {
r_asm_set_pc (core->assembler, core->offset);
eprintf ("modify (%c)=%s\n", input[2], input+4);
len = r_asm_modify (core->assembler, core->block, input[2],
r_num_math (core->num, input+4));
eprintf ("len=%d\n", len);
if (len>0) {
r_core_write_at (core, core->offset, core->block, len);
WSEEK (core, len);
} else eprintf ("r_asm_modify = %d\n", len);
} else eprintf ("Usage: wA [type] [value]\n");
break;
case '?':
default:
r_cons_printf ("Usage: wA [type] [value]\n"
"Types:\n"
" r raw write value\n"
" v set value (taking care of current address)\n"
" d destination register\n"
" 0 1st src register\n"
" 1 2nd src register\n"
"Example: wA r 0 # e800000000\n");
break;
}
break;
case 'c':
switch (input[1]) {
case 'i':
r_io_cache_commit (core->io);
r_core_block_read (core, 0);
break;
case 'r':
r_io_cache_reset (core->io, R_TRUE);
/* Before loading the core block we have to make sure that if
* the cache wrote past the original EOF these changes are no
* longer displayed. */
memset (core->block, 0xff, core->blocksize);
r_core_block_read (core, 0);
break;
case '-':
if (input[2]=='*') {
r_io_cache_reset (core->io, R_TRUE);
} else if (input[2]==' ') {
char *p = strchr (input+3, ' ');
ut64 to, from = core->offset;
if (p) {
*p = 0;
from = r_num_math (core->num, input+3);
to = r_num_math (core->num, input+3);
if (to<from) {
eprintf ("Invalid range (from>to)\n");
return 0;
}
} else {
from = r_num_math (core->num, input+3);
to = from + core->blocksize;
}
r_io_cache_invalidate (core->io, from, to);
} else {
eprintf ("Invalidate write cache at 0x%08"PFMT64x"\n", core->offset);
r_io_cache_invalidate (core->io, core->offset, core->offset+core->blocksize);
}
/* See 'r' above. */
memset (core->block, 0xff, core->blocksize);
r_core_block_read (core, 0);
break;
case '?':
r_cons_printf (
"Usage: wc[ir*?]\n"
" wc list all write changes\n"
" wc- [a] [b] remove write op at curseek or given addr\n"
" wc* \"\" in radare commands\n"
" wcr reset all write changes in cache\n"
" wci commit write cache\n"
"NOTE: Requires 'e io.cache=true'\n");
break;
case '*':
r_io_cache_list (core->io, R_TRUE);
break;
case '\0':
r_io_cache_list (core->io, R_FALSE);
break;
}
break;
case ' ':
/* write string */
len = r_str_escape (str);
r_core_write_at (core, core->offset, (const ut8*)str, len);
#if 0
r_io_set_fd (core->io, core->file->fd);
r_io_write_at (core->io, core->offset, (const ut8*)str, len);
#endif
WSEEK (core, len);
r_core_block_read (core, 0);
break;
case 't':
if (*str != ' ') {
eprintf ("Usage: wt file [size]\n");
} else {
tmp = strchr (str+1, ' ');
if (tmp) {
st64 sz = (st64) r_num_math (core->num, tmp+1);
*tmp = 0;
if (sz<1) eprintf ("Invalid length\n");
else r_core_dump (core, str+1, core->offset, (ut64)sz);
} else r_file_dump (str+1, core->block, core->blocksize);
}
break;
case 'T':
eprintf ("TODO: wT // why?\n");
break;
case 'f':
arg = (const char *)(input+((input[1]==' ')?2:1));
if ((buf = (ut8*) r_file_slurp (arg, &size))) {
r_io_set_fd (core->io, core->file->fd);
r_io_write_at (core->io, core->offset, buf, size);
WSEEK (core, size);
free(buf);
r_core_block_read (core, 0);
} else eprintf ("Cannot open file '%s'\n", arg);
break;
case 'F':
arg = (const char *)(input+((input[1]==' ')?2:1));
if ((buf = r_file_slurp_hexpairs (arg, &size))) {
r_io_set_fd (core->io, core->file->fd);
r_io_write_at (core->io, core->offset, buf, size);
WSEEK (core, size);
free (buf);
r_core_block_read (core, 0);
} else eprintf ("Cannot open file '%s'\n", arg);
break;
case 'w':
str++;
len = (len-1)<<1;
if (len>0) tmp = malloc (len+1);
else tmp = NULL;
if (tmp) {
for (i=0; i<len; i++) {
if (i%2) tmp[i] = 0;
else tmp[i] = str[i>>1];
}
str = tmp;
r_io_set_fd (core->io, core->file->fd);
r_io_write_at (core->io, core->offset, (const ut8*)str, len);
WSEEK (core, len);
r_core_block_read (core, 0);
free (tmp);
} else eprintf ("Cannot malloc %d\n", len);
break;
case 'x':
{
int b, len = strlen (input);
ut8 *buf = malloc (len+1);
len = r_hex_str2bin (input+1, buf);
if (len != 0) {
if (len<0) len = -len+1;
b = core->block[len]&0xf;
b |= (buf[len]&0xf0);
buf[len] = b;
r_core_write_at (core, core->offset, buf, len);
WSEEK (core, len);
r_core_block_read (core, 0);
} else eprintf ("Error: invalid hexpair string\n");
free (buf);
}
break;
case 'a':
switch (input[1]) {
case 'o':
if (input[2] == ' ')
r_core_hack (core, input+3);
else r_core_hack_help (core);
break;
case ' ':
case '*':
{ const char *file = input[1]=='*'? input+2: input+1;
RAsmCode *acode;
r_asm_set_pc (core->assembler, core->offset);
acode = r_asm_massemble (core->assembler, file);
if (acode) {
if (input[1]=='*') {
r_cons_printf ("wx %s\n", acode->buf_hex);
} else {
if (r_config_get_i (core->config, "scr.prompt"))
eprintf ("Written %d bytes (%s)=wx %s\n", acode->len, input+1, acode->buf_hex);
r_core_write_at (core, core->offset, acode->buf, acode->len);
WSEEK (core, acode->len);
r_core_block_read (core, 0);
}
r_asm_code_free (acode);
}
}
break;
case 'f':
if ((input[2]==' '||input[2]=='*')) {
const char *file = input[2]=='*'? input+4: input+3;
RAsmCode *acode;
r_asm_set_pc (core->assembler, core->offset);
acode = r_asm_assemble_file (core->assembler, file);
if (acode) {
if (input[2]=='*') {
r_cons_printf ("wx %s\n", acode->buf_hex);
} else {
if (r_config_get_i (core->config, "scr.prompt"))
eprintf ("Written %d bytes (%s)=wx %s\n", acode->len, input+1, acode->buf_hex);
r_core_write_at (core, core->offset, acode->buf, acode->len);
WSEEK (core, acode->len);
r_core_block_read (core, 0);
}
r_asm_code_free (acode);
} else eprintf ("Cannot assemble file\n");
} else eprintf ("Wrong argument\n");
break;
default:
eprintf ("Usage: wa[of*] [arg]\n"
" wa nop : write nopcode using asm.arch and asm.bits\n"
" wa* mov eax, 33 : show 'wx' op with hexpair bytes of sassembled opcode\n"
" \"wa nop;nop\" : assemble more than one instruction (note the quotes)\n"
" waf foo.asm : assemble file and write bytes\n"
" wao nop : convert current opcode into nops\n"
" wao? : show help for assembler operation on current opcode (hack)\n");
break;
}
break;
case 'b':
{
int len = strlen (input);
ut8 *buf = malloc (len+1);
if (buf) {
len = r_hex_str2bin (input+1, buf);
if (len > 0) {
r_mem_copyloop (core->block, buf, core->blocksize, len);
r_core_write_at (core, core->offset, core->block, core->blocksize);
WSEEK (core, core->blocksize);
r_core_block_read (core, 0);
} else eprintf ("Wrong argument\n");
} else eprintf ("Cannot malloc %d\n", len+1);
}
break;
case 'm':
size = r_hex_str2bin (input+1, (ut8*)str);
switch (input[1]) {
case '\0':
eprintf ("Current write mask: TODO\n");
// TODO
break;
case '?':
break;
case '-':
r_io_set_write_mask(core->io, 0, 0);
eprintf ("Write mask disabled\n");
break;
case ' ':
if (size>0) {
r_io_set_fd (core->io, core->file->fd);
r_io_set_write_mask (core->io, (const ut8*)str, size);
WSEEK (core, size);
eprintf ("Write mask set to '");
for (i=0; i<size; i++)
eprintf ("%02x", str[i]);
eprintf ("'\n");
} else eprintf ("Invalid string\n");
break;
}
break;
case 'v':
{
int type = 0;
ut8 addr1;
ut16 addr2;
ut32 addr4, addr4_;
ut64 addr8;
switch (input[1]) {
case '?':
r_cons_printf ("Usage: wv[size] [value] # write value of given size\n"
" wv1 234 # write one byte with this value\n"
" wv 0x834002 # write dword with this value\n"
"Supported sizes are: 1, 2, 4, 8\n");
return 0;
case '1':
type = 1;
break;
case '2':
type = 2;
break;
case '4':
type = 4;
break;
case '8':
type = 8;
break;
}
off = r_num_math (core->num, input+2);
r_io_set_fd (core->io, core->file->fd);
r_io_seek (core->io, core->offset, R_IO_SEEK_SET);
if (type == 0)
type = (off&UT64_32U)? 8: 4;
switch (type) {
case 1:
addr1 = (ut8)off;
r_io_write (core->io, (const ut8 *)&addr1, 1);
WSEEK (core, 1);
break;
case 2:
addr2 = (ut16)off;
r_io_write (core->io, (const ut8 *)&addr2, 2);
WSEEK (core, 2);
break;
case 4:
addr4_ = (ut32)off;
//drop_endian((ut8*)&addr4_, (ut8*)&addr4, 4); /* addr4_ = addr4 */
//endian_memcpy((ut8*)&addr4, (ut8*)&addr4_, 4); /* addr4 = addr4_ */
memcpy ((ut8*)&addr4, (ut8*)&addr4_, 4); // XXX needs endian here too
r_io_write (core->io, (const ut8 *)&addr4, 4);
WSEEK (core, 4);
break;
case 8:
/* 8 byte addr */
memcpy ((ut8*)&addr8, (ut8*)&off, 8); // XXX needs endian here
// endian_memcpy((ut8*)&addr8, (ut8*)&off, 8);
r_io_write (core->io, (const ut8 *)&addr8, 8);
WSEEK (core, 8);
break;
}
r_core_block_read (core, 0);
}
break;
case 'o':
switch (input[1]) {
case 'a':
case 's':
case 'A':
case 'x':
case 'r':
case 'l':
case 'm':
case 'd':
case 'o':
case 'w':
if (input[2]!=' ') {
r_cons_printf ("Usage: 'wo%c 00 11 22'\n", input[1]);
return 0;
}
case '2':
case '4':
r_core_write_op (core, input+3, input[1]);
r_core_block_read (core, 0);
break;
case 'n':
r_core_write_op (core, "ff", 'x');
r_core_block_read (core, 0);
break;
case '\0':
case '?':
default:
r_cons_printf (
"Usage: wo[asmdxoArl24] [hexpairs] @ addr[:bsize]\n"
"Example:\n"
" wox 0x90 ; xor cur block with 0x90\n"
" wox 90 ; xor cur block with 0x90\n"
" wox 0x0203 ; xor cur block with 0203\n"
" woa 02 03 ; add [0203][0203][...] to curblk\n"
"Supported operations:\n"
" wow == write looped value (alias for 'wb')\n"
" woa += addition\n"
" wos -= substraction\n"
" wom *= multiply\n"
" wod /= divide\n"
" wox ^= xor\n"
" woo |= or\n"
" woA &= and\n"
" wor >>= shift right\n"
" wol <<= shift left\n"
" wo2 2= 2 byte endian swap\n"
" wo4 4= 4 byte endian swap\n"
);
break;
}
break;
default:
case '?':
if (core->oobi) {
eprintf ("Writing oobi buffer!\n");
r_io_set_fd (core->io, core->file->fd);
r_io_write (core->io, core->oobi, core->oobi_len);
WSEEK (core, core->oobi_len);
r_core_block_read (core, 0);
} else r_cons_printf (
"Usage: w[x] [str] [<file] [<<EOF] [@addr]\n"
" w foobar write string 'foobar'\n"
" wr 10 write 10 random bytes\n"
" ww foobar write wide string 'f\\x00o\\x00o\\x00b\\x00a\\x00r\\x00'\n"
" wa push ebp write opcode, separated by ';' (use '\"' around the command)\n"
" waf file assemble file and write bytes\n"
" wA r 0 alter/modify opcode at current seek (see wA?)\n"
" wb 010203 fill current block with cyclic hexpairs\n"
" wc[ir*?] write cache commit/reset/list\n"
" wx 9090 write two intel nops\n"
" wv eip+34 write 32-64 bit value\n"
" wo? hex write in block with operation. 'wo?' fmi\n"
" wm f0ff set binary mask hexpair to be used as cyclic write mask\n"
" wf file write contents of file at current offset\n"
" wF file write contents of hexpairs file here\n"
" wt file [sz] write to file (from current seek, blocksize or sz bytes)\n"
" wp file apply radare patch file. See wp? fmi\n");
//TODO: add support for offset+seek
// " wf file o s ; write contents of file from optional offset 'o' and size 's'.\n"
break;
}
static void printmetaitem(RAnal *a, RAnalMetaItem *d, int rad) {
char *pstr, *str;
//eprintf ("%d %d\n", d->space, a->meta_spaces.space_idx);
if (a->meta_spaces.space_idx != -1) {
if (a->meta_spaces.space_idx != d->space) {
return;
}
}
str = r_str_escape (d->str);
if (str || d->type == 'd') {
if (d->type=='s' && !*str) {
free (str);
return;
}
if (!str) {
pstr = "";
} else if (d->type != 'C') {
r_name_filter (str, 0);
pstr = str;
} else pstr = d->str;
// r_str_sanitize (str);
switch (rad) {
case 'j':
a->cb_printf ("{\"offset\":%"PFMT64d", \"type\":\"%s\", \"name\":\"%s\"}",
d->from, r_meta_type_to_string (d->type), str);
break;
case 0:
case 1:
case '*':
default:
switch (d->type) {
case 'C':
{
const char *type = r_meta_type_to_string (d->type);
char *s = sdb_encode ((const ut8*)pstr, -1);
if (!s) s = strdup (pstr);
if (rad) {
if (!strcmp (type, "CCu")) {
a->cb_printf ("%s base64:%s @ 0x%08"PFMT64x"\n",
type, s, d->from);
} else {
a->cb_printf ("%s %s @ 0x%08"PFMT64x"\n",
type, pstr, d->from);
}
} else {
if (!strcmp (type, "CCu")) {
char *mys = r_str_escape (pstr);
a->cb_printf ("0x%08"PFMT64x" %s \"%s\"\n",
d->from, type, mys);
free (mys);
} else {
a->cb_printf ("0x%08"PFMT64x" %s \"%s\"\n",
d->from, type, pstr);
}
}
free (s);
}
break;
case 'h': /* hidden */
case 's': /* string */
if (rad) {
a->cb_printf ("%s %d @ 0x%08"PFMT64x" # %s\n",
r_meta_type_to_string (d->type),
(int)d->size, d->from, pstr);
} else {
// TODO: use b64 here
a->cb_printf ("0x%08"PFMT64x" string[%d] \"%s\"\n",
d->from, (int)d->size, pstr);
}
break;
case 'd': /* data */
if (rad) {
a->cb_printf ("%s %d @ 0x%08"PFMT64x"\n",
r_meta_type_to_string (d->type),
(int)d->size, d->from);
} else {
a->cb_printf ("0x%08"PFMT64x" data %s %d\n",
d->from, r_meta_type_to_string (d->type), (int)d->size);
}
break;
case 'm': /* magic */
case 'f': /* formatted */
if (rad) {
a->cb_printf ("%s %d %s @ 0x%08"PFMT64x"\n",
r_meta_type_to_string (d->type),
(int)d->size, pstr, d->from);
} else {
const char *dtype = d->type=='m'?"magic":"format";
a->cb_printf ("0x%08"PFMT64x" %s %d %s\n",
d->from, dtype, (int)d->size, pstr);
}
break;
default:
if (rad) {
a->cb_printf ("%s %d 0x%08"PFMT64x" # %s\n",
r_meta_type_to_string (d->type),
(int)d->size, d->from, pstr);
} else {
// TODO: use b64 here
a->cb_printf ("0x%08"PFMT64x" array[%d] %s %s\n",
d->from, (int)d->size,
r_meta_type_to_string (d->type), pstr);
}
break;
}
break;
}
if (str)
free (str);
}
}
R_API int r_sys_cmd_str_full(const char *cmd, const char *input, char **output, int *len, char **sterr) {
char buffer[1024], *outputptr = NULL;
char *inputptr = (char *)input;
int pid, bytes = 0, status;
int sh_in[2], sh_out[2], sh_err[2];
if (len) {
*len = 0;
}
if (pipe (sh_in)) {
return false;
}
if (output) {
if (pipe (sh_out)) {
close (sh_in[0]);
close (sh_in[1]);
close (sh_out[0]);
close (sh_out[1]);
return false;
}
}
if (pipe (sh_err)) {
close (sh_in[0]);
close (sh_in[1]);
return false;
}
switch ((pid = r_sys_fork ())) {
case -1:
return false;
case 0:
dup2 (sh_in[0], 0);
close (sh_in[0]);
close (sh_in[1]);
if (output) {
dup2 (sh_out[1], 1);
close (sh_out[0]);
close (sh_out[1]);
}
if (sterr) {
dup2 (sh_err[1], 2);
} else {
close (2);
}
close (sh_err[0]);
close (sh_err[1]);
exit (r_sandbox_system (cmd, 0));
default:
outputptr = strdup ("");
if (!outputptr) {
return false;
}
if (sterr) {
*sterr = strdup ("");
if (!*sterr) {
free (outputptr);
return false;
}
}
if (output) {
close (sh_out[1]);
}
close (sh_err[1]);
close (sh_in[0]);
if (!inputptr || !*inputptr) {
close (sh_in[1]);
}
// we should handle broken pipes somehow better
signal (SIGPIPE, SIG_IGN);
for (;;) {
fd_set rfds, wfds;
int nfd;
FD_ZERO (&rfds);
FD_ZERO (&wfds);
if (output) {
FD_SET (sh_out[0], &rfds);
}
if (sterr) {
FD_SET (sh_err[0], &rfds);
}
if (inputptr && *inputptr) {
FD_SET (sh_in[1], &wfds);
}
memset (buffer, 0, sizeof (buffer));
nfd = select (sh_err[0] + 1, &rfds, &wfds, NULL, NULL);
if (nfd < 0) {
break;
}
if (output && FD_ISSET (sh_out[0], &rfds)) {
if (!(bytes = read (sh_out[0], buffer, sizeof (buffer)-1))) {
break;
}
buffer[sizeof(buffer) - 1] = '\0';
if (len) {
*len += bytes;
}
outputptr = r_str_append (outputptr, buffer);
} else if (FD_ISSET (sh_err[0], &rfds) && sterr) {
if (!read (sh_err[0], buffer, sizeof (buffer)-1)) {
break;
}
buffer[sizeof(buffer) - 1] = '\0';
*sterr = r_str_append (*sterr, buffer);
} else if (FD_ISSET (sh_in[1], &wfds) && inputptr && *inputptr) {
int inputptr_len = strlen (inputptr);
bytes = write (sh_in[1], inputptr, inputptr_len);
if (bytes != inputptr_len) {
break;
}
inputptr += bytes;
if (!*inputptr) {
close (sh_in[1]);
/* If neither stdout nor stderr should be captured,
* abort now - nothing more to do for select(). */
if (!output && !sterr) {
break;
}
}
}
}
if (output) {
close (sh_out[0]);
}
close (sh_err[0]);
close (sh_in[1]);
waitpid (pid, &status, 0);
bool ret = true;
if (status) {
char *escmd = r_str_escape (cmd);
eprintf ("error code %d\n", WEXITSTATUS(status));
//eprintf ("%s: failed command '%s'\n", __func__, escmd);
free (escmd);
ret = false;
}
if (output) {
*output = outputptr;
} else {
free (outputptr);
}
return ret;
}
return false;
}
