radare2/libr/util/sys.c
2016-01-19 13:16:24 +01:00

769 lines
17 KiB
C

/* radare - LGPL - Copyright 2009-2015 - pancake */
#include <r_userconf.h>
#include <stdlib.h>
#include <string.h>
#if defined(__NetBSD__)
# include <sys/param.h>
# if __NetBSD_Prereq__(7,0,0)
# define NETBSD_WITH_BACKTRACE
# endif
#endif
#include <sys/types.h>
#include <dirent.h>
#include <r_types.h>
#include <r_util.h>
#if (__linux__ && __GNU_LIBRARY__) || defined(NETBSD_WITH_BACKTRACE)
# include <execinfo.h>
#endif
#if __APPLE__
#include <errno.h>
#include <execinfo.h>
// iOS dont have this we cant hardcode
// #include <crt_externs.h>
extern char ***_NSGetEnviron(void);
# ifndef PROC_PIDPATHINFO_MAXSIZE
# define PROC_PIDPATHINFO_MAXSIZE 1024
int proc_pidpath(int pid, void * buffer, ut32 buffersize);
//# include <libproc.h>
# endif
#endif
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
# include <sys/wait.h>
# include <sys/stat.h>
# include <errno.h>
# include <signal.h>
# include <unistd.h>
extern char **environ;
#ifdef __HAIKU__
# define Sleep sleep
#endif
#endif
#if __WINDOWS__ && !defined(__CYGWIN__)
# include <io.h>
# include <winbase.h>
#endif
R_LIB_VERSION(r_util);
static const struct {const char* name; ut64 bit;} arch_bit_array[] = {
{"x86", R_SYS_ARCH_X86},
{"arm", R_SYS_ARCH_ARM},
{"ppc", R_SYS_ARCH_PPC},
{"m68k", R_SYS_ARCH_M68K},
{"java", R_SYS_ARCH_JAVA},
{"mips", R_SYS_ARCH_MIPS},
{"sparc", R_SYS_ARCH_SPARC},
{"csr", R_SYS_ARCH_CSR},
{"tms320", R_SYS_ARCH_TMS320},
{"msil", R_SYS_ARCH_MSIL},
{"objd", R_SYS_ARCH_OBJD},
{"bf", R_SYS_ARCH_BF},
{"sh", R_SYS_ARCH_SH},
{"avr", R_SYS_ARCH_AVR},
{"dalvik", R_SYS_ARCH_DALVIK},
{"z80", R_SYS_ARCH_Z80},
{"arc", R_SYS_ARCH_ARC},
{"i8080", R_SYS_ARCH_I8080},
{"rar", R_SYS_ARCH_RAR},
{NULL, 0}
};
R_API int r_sys_fork() {
#if HAVE_FORK
#if __WINDOWS__ && !__CYGWIN__
return -1;
#else
return fork ();
#endif
#else
return -1;
#endif
}
/* TODO: import stuff fron bininfo/p/bininfo_addr2line */
/* TODO: check endianness issues here */
R_API ut64 r_sys_now(void) {
ut64 ret;
struct timeval now;
gettimeofday (&now, NULL);
ret = now.tv_sec;
ret <<= 20;
ret |= now.tv_usec;
//(sizeof (now.tv_sec) == 4
return ret;
}
R_API int r_sys_truncate(const char *file, int sz) {
#if __WINDOWS__ && !__CYGWIN__
int fd = r_sandbox_open (file, O_RDWR, 0644);
if (!fd) return R_FALSE;
ftruncate (fd, sz);
close (fd);
return R_TRUE;
#else
return truncate (file, sz)? R_FALSE: R_TRUE;
#endif
}
R_API RList *r_sys_dir(const char *path) {
RList *list = NULL;
struct dirent *entry;
DIR *dir = r_sandbox_opendir (path);
if (dir) {
list = r_list_new ();
if (list) {
list->free = free;
while ((entry = readdir (dir))) {
r_list_append (list, strdup (entry->d_name));
}
}
closedir (dir);
}
return list;
}
R_API char *r_sys_cmd_strf(const char *fmt, ...) {
char *ret, cmd[4096];
va_list ap;
va_start (ap, fmt);
vsnprintf (cmd, sizeof (cmd), fmt, ap);
ret = r_sys_cmd_str (cmd, NULL, NULL);
va_end (ap);
return ret;
}
#ifdef __MAC_10_7
#define APPLE_WITH_BACKTRACE 1
#endif
#ifdef __IPHONE_4_0
#define APPLE_WITH_BACKTRACE 1
#endif
R_API void r_sys_backtrace(void) {
#if (__linux__ && __GNU_LIBRARY__) || (__APPLE__ && APPLE_WITH_BACKTRACE) || defined(NETBSD_WITH_BACKTRACE)
void *array[10];
size_t i, size = backtrace (array, 10);
char **strings = (char **)(size_t)backtrace_symbols (array, size);
printf ("Backtrace %zd stack frames.\n", size);
for (i = 0; i < size; i++)
printf ("%s\n", strings[i]);
free (strings);
#elif __APPLE__
void **fp = (void **) __builtin_frame_address (0);
void *saved_pc = __builtin_return_address (0);
void *saved_fp = __builtin_frame_address (1);
int depth = 0;
printf ("[%d] pc == %p fp == %p\n", depth++, saved_pc, saved_fp);
fp = saved_fp;
while (fp != NULL) {
saved_fp = *fp;
fp = saved_fp;
if (*fp == NULL)
break;
saved_pc = *(fp + 2);
printf ("[%d] pc == %p fp == %p\n", depth++, saved_pc, saved_fp);
}
#else
#warning TODO: r_sys_bt : unimplemented
#endif
}
R_API int r_sys_sleep(int secs) {
#if __UNIX__
return sleep (secs);
#else
Sleep (secs * 1000); // W32
return 0;
#endif
}
R_API int r_sys_usleep(int usecs) {
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
// unix api uses microseconds
return usleep (usecs);
#else
// w32 api uses milliseconds
usecs /= 1000;
Sleep (usecs); // W32
return 0;
#endif
}
R_API int r_sys_clearenv(void) {
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
if (environ == NULL) {
return 0;
}
while (*environ != NULL) {
*environ++ = NULL;
}
return 0;
#else
#warning r_sys_clearenv : unimplemented for this platform
return 0;
#endif
}
R_API int r_sys_setenv(const char *key, const char *value) {
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
if (!key) return 0;
if (value == NULL) {
unsetenv (key);
return 0;
}
return setenv (key, value, 1);
#elif __WINDOWS__
SetEnvironmentVariable (key, (LPSTR)value);
return 0; // TODO. get ret
#else
#warning r_sys_setenv : unimplemented for this platform
return 0;
#endif
}
static char *crash_handler_cmd = NULL;
#if __UNIX__
static void signal_handler(int signum) {
int len;
char *cmd;
if (!crash_handler_cmd)
return;
len = strlen (crash_handler_cmd)+32;
cmd = malloc (len);
snprintf (cmd, len, crash_handler_cmd, getpid ());
r_sys_backtrace ();
exit (r_sys_cmd (cmd));
}
static int checkcmd(const char *c) {
char oc = 0;
for (;*c;c++) {
if (oc == '%')
if (*c!='d' && *c!='%')
return 0;
oc = *c;
}
return 1;
}
#endif
R_API int r_sys_crash_handler(const char *cmd) {
#if __UNIX__
struct sigaction sigact;
if (!checkcmd (cmd))
return R_FALSE;
free (crash_handler_cmd);
crash_handler_cmd = strdup (cmd);
sigact.sa_handler = signal_handler;
sigemptyset (&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction (SIGINT, &sigact, (struct sigaction *)NULL);
sigaddset (&sigact.sa_mask, SIGSEGV);
sigaction (SIGSEGV, &sigact, (struct sigaction *)NULL);
sigaddset (&sigact.sa_mask, SIGBUS);
sigaction (SIGBUS, &sigact, (struct sigaction *)NULL);
sigaddset (&sigact.sa_mask, SIGQUIT);
sigaction (SIGQUIT, &sigact, (struct sigaction *)NULL);
sigaddset (&sigact.sa_mask, SIGHUP);
sigaction (SIGHUP, &sigact, (struct sigaction *)NULL);
sigaddset (&sigact.sa_mask, SIGKILL);
sigaction (SIGKILL, &sigact, (struct sigaction *)NULL);
return R_TRUE;
#else
return R_FALSE;
#endif
}
R_API char *r_sys_getenv(const char *key) {
#if __WINDOWS__ && !__CYGWIN__
static char envbuf[1024];
if (!key) return NULL;
envbuf[0] = 0;
GetEnvironmentVariable (key, (LPSTR)&envbuf, sizeof (envbuf));
// TODO: handle return value of GEV
return *envbuf? strdup (envbuf): NULL;
#else
char *b;
if (!key) return NULL;
b = getenv (key);
return b? strdup (b): NULL;
#endif
}
R_API char *r_sys_getdir(void) {
char *ret;
#if __WINDOWS__ && !__CYGWIN__
char *cwd = _getcwd (NULL, 0);
#else
char *cwd = getcwd (NULL, 0);
#endif
ret = cwd ? strdup (cwd) : NULL;
if (cwd)
free (cwd);
return ret;
}
R_API int r_sys_chdir(const char *s) {
return r_sandbox_chdir (s)==0;
}
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
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 = r_sys_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]);
// 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)) == 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) {
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);
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;
}
#elif __WINDOWS__
// TODO: fully implement the rest
R_API int r_sys_cmd_str_full(const char *cmd, const char *input, char **output, int *len, char **sterr) {
char *result = r_sys_cmd_str_w32 (cmd);
if (len) *len = 0;
if (output) *output = result;
if (result) return R_TRUE;
return R_FALSE;
}
#else
R_API int r_sys_cmd_str_full(const char *cmd, const char *input, char **output, int *len, char **sterr) {
eprintf ("r_sys_cmd_str: not yet implemented for this platform\n");
return R_FALSE;
}
#endif
R_API int r_sys_cmdf (const char *fmt, ...) {
int ret;
char cmd[4096];
va_list ap;
va_start(ap, fmt);
vsnprintf (cmd, sizeof (cmd), fmt, ap);
ret = r_sys_cmd (cmd);
va_end (ap);
return ret;
}
R_API int r_sys_cmdbg (const char *str) {
#if __UNIX__ || __CYGWIN && !defined(MINGW32)
int ret, pid = r_sys_fork ();
if (pid == -1) return -1;
if (pid) return pid;
ret = r_sandbox_system (str, 0);
eprintf ("{exit: %d, pid: %d, cmd: \"%s\"}", ret, pid, str);
exit (0);
return -1;
#else
#warning r_sys_cmdbg is not implemented for this platform
return -1;
#endif
}
R_API int r_sys_cmd (const char *str) {
#if __FreeBSD__
/* freebsd system() is broken */
int st, pid, fds[2];
if (pipe (fds))
return -1;
pid = vfork ();
if (pid == -1)
return -1;
if (pid == 0) {
dup2 (1, fds[1]);
// char *argv[] = { "/bin/sh", "-c", str, NULL};
// execv (argv[0], argv);
r_sandbox_system (str, 0);
_exit (127); /* error */
} else {
dup2 (1, fds[0]);
waitpid (pid, &st, 0);
}
return WEXITSTATUS (st);
#else
return r_sandbox_system (str, 1);
#endif
}
R_API char *r_sys_cmd_str(const char *cmd, const char *input, int *len) {
char *output;
if (r_sys_cmd_str_full (cmd, input, &output, len, NULL))
return output;
return NULL;
}
R_API bool r_sys_mkdirp(const char *dir) {
bool ret = true;
char slash = R_SYS_DIR[0];
char *path = strdup (dir), *ptr = path;
if (*ptr == slash) ptr++;
#if __WINDOWS__ && !defined(__CYGWIN__)
{
char *p = strstr (ptr, ":\\");
if (p) ptr = p + 2;
}
#endif
for (;;) {
// find next slash
for (; *ptr; ptr++) {
if (*ptr == '/' || *ptr == '\\') {
slash = *ptr;
break;
}
}
if (!*ptr) break;
*ptr = 0;
if (!r_sys_mkdir (path) && r_sys_mkdir_failed ()) {
eprintf ("r_sys_mkdirp: fail '%s' of '%s'\n", path, dir);
free (path);
return false;
}
*ptr = slash;
ptr++;
}
if (!r_sys_mkdir (path) && r_sys_mkdir_failed ())
ret = false;
free (path);
return ret;
}
R_API void r_sys_perror(const char *fun) {
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
perror (fun);
#elif __WINDOWS__
char *lpMsgBuf;
LPVOID lpDisplayBuf;
DWORD dw = GetLastError ();
FormatMessage ( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
lpDisplayBuf = (LPVOID)LocalAlloc (LMEM_ZEROINIT,
(lstrlen ((LPCTSTR)lpMsgBuf)+
lstrlen ((LPCTSTR)fun)+40)*sizeof (TCHAR));
eprintf ("%s: %s\n", fun, lpMsgBuf);
LocalFree (lpMsgBuf);
LocalFree (lpDisplayBuf);
#endif
}
R_API bool r_sys_arch_match(const char *archstr, const char *arch) {
char *ptr;
if (!archstr || !arch || !*archstr || !*arch)
return true;
if (!strcmp (archstr, "*") || !strcmp (archstr, "any"))
return true;
if (!strcmp (archstr, arch))
return true;
if ((ptr = strstr (archstr, arch))) {
char p = ptr[strlen (arch)];
if (!p || p==',') return true;
}
return false;
}
R_API int r_sys_arch_id(const char *arch) {
int i;
for (i=0; arch_bit_array[i].name; i++)
if (!strcmp (arch, arch_bit_array[i].name))
return arch_bit_array[i].bit;
return 0;
}
R_API const char *r_sys_arch_str(int arch) {
int i;
for (i=0; arch_bit_array[i].name; i++)
if (arch & arch_bit_array[i].bit)
return arch_bit_array[i].name;
return "none";
}
#define USE_FORK 0
R_API int r_sys_run(const ut8 *buf, int len) {
const int sz = 4096;
int pdelta, ret, (*cb)();
#if USE_FORK
int st, pid;
#endif
// TODO: define R_SYS_ALIGN_FORWARD in r_util.h
ut8 *ptr, *p = malloc ((sz+len)<<1);
ptr = p;
pdelta = ((size_t)(p)) & (4096-1);
if (pdelta)
ptr += (4096-pdelta);
if (!ptr || !buf) {
eprintf ("r_sys_run: Cannot run empty buffer\n");
free (p);
return R_FALSE;
}
memcpy (ptr, buf, sz);
r_mem_protect (ptr, sz, "rx");
//r_mem_protect (ptr, sz, "rwx"); // try, ignore if fail
cb = (void*)ptr;
#if USE_FORK
#if __UNIX__ || __CYGWIN__ && !defined(MINGW32)
pid = r_sys_fork ();
//pid = -1;
#else
pid = -1;
#endif
if (pid<0) {
return cb ();
}
if (!pid) {
ret = cb ();
exit (ret);
return ret;
}
st = 0;
waitpid (pid, &st, 0);
if (WIFSIGNALED (st)) {
int num = WTERMSIG(st);
eprintf ("Got signal %d\n", num);
ret = num;
} else {
ret = WEXITSTATUS (st);
}
#else
ret = cb ();
#endif
free (p);
return ret;
}
R_API int r_is_heap (void *p) {
void *q = malloc (8);
ut64 mask = UT64_MAX;
ut64 addr = (ut64)(size_t)q;
addr>>=16;
addr<<=16;
mask>>=16;
mask<<=16;
free (q);
return (((ut64)(size_t)p) == mask);
}
R_API char *r_sys_pid_to_path(int pid) {
#if __WINDOWS__
BOOL WINAPI (*QueryFullProcessImageNameA) (HANDLE, DWORD, LPTSTR, PDWORD);
DWORD WINAPI (*GetProcessImageFileNameA) (HANDLE, LPTSTR, DWORD);
HANDLE kernel32 = LoadLibrary ("Kernel32.dll");
if (!kernel32) {
eprintf ("Error getting the handle to Kernel32.dll\n");
return NULL;
}
QueryFullProcessImageNameA = GetProcAddress (kernel32, "QueryFullProcessImageNameA");
if (!QueryFullProcessImageNameA) {
// QueryFullProcessImageName does not exist before Vista, fallback to GetProcessImageFileName
HANDLE psapi = LoadLibrary ("Psapi.dll");
if (!psapi) {
eprintf ("Error getting the handle to Psapi.dll\n");
return NULL;
}
GetProcessImageFileNameA = GetProcAddress (psapi, "GetProcessImageFileNameA");
if (!GetProcessImageFileNameA) {
eprintf ("Error getting the address of GetProcessImageFileNameA\n");
return NULL;
}
}
HANDLE handle = NULL;
TCHAR filename[MAX_PATH];
DWORD maxlength = MAX_PATH;
handle = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pid);
if (handle != NULL) {
if (QueryFullProcessImageNameA) {
if (QueryFullProcessImageNameA (handle, 0, filename, &maxlength) == 0) {
eprintf("Error calling QueryFullProcessImageNameA\n");
CloseHandle (handle);
return NULL;
}
} else {
if (GetProcessImageFileNameA (handle, filename, maxlength) == 0) {
eprintf("Error calling GetProcessImageFileNameA\n");
CloseHandle (handle);
return NULL;
}
}
CloseHandle (handle);
return strdup (filename);
}
return NULL;
#elif __APPLE__
char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
pathbuf[0] = 0;
int ret = proc_pidpath (pid, pathbuf, sizeof (pathbuf));
if (ret <= 0)
return NULL;
return strdup (pathbuf);
#else
int ret;
char buf[128], pathbuf[1024];
#if __FreeBSD__
snprintf (buf, sizeof (buf), "/proc/%d/file", pid);
#else
snprintf (buf, sizeof (buf), "/proc/%d/exe", pid);
#endif
ret = readlink (buf, pathbuf, sizeof (pathbuf)-1);
if (ret<1)
return NULL;
pathbuf[ret] = 0;
return strdup (pathbuf);
#endif
}
static char** env = NULL;
R_API char **r_sys_get_environ () {
#if __APPLE__
env = *_NSGetEnviron();
#endif
// return environ if available??
if (!env)
env = r_lib_dl_sym (NULL, "environ");
return env;
}
R_API void r_sys_set_environ (char **e) {
env = e;
}
R_API char *r_sys_whoami (char *buf) {
char _buf[32];
int pid = getpid ();
int hasbuf = (buf)? 1: 0;
if (!hasbuf) buf = _buf;
sprintf (buf, "pid%d", pid);
return hasbuf? buf: strdup (buf);
}
R_API int r_sys_getpid() {
#if __UNIX__
return getpid ();
#else
#warning r_sys_getpid not implemented for this platform
return -1;
#endif
}