[ginge.git] / loader / override.c

/*
 * GINGE - GINGE Is Not Gp2x Emulator
 * (C) notaz, 2010-2011
 *
 * This work is licensed under the MAME license, see COPYING file for details.
 */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <termios.h>
#include <errno.h>

#include "realfuncs.h"
#include "header.h"

#if (DBG & 1)
#define strace printf
#else
#define strace(...)
#endif

#define UNUSED __attribute__((unused))

static const struct dev_fd_t takeover_devs[] = {
  { "/dev/mem",     FAKEDEV_MEM },
  { "/dev/GPIO",    FAKEDEV_GPIO },
  { "/dev/fb0",     FAKEDEV_FB0 },
  { "/dev/fb/0",    FAKEDEV_FB0 },
  { "/dev/fb1",     FAKEDEV_FB1 },
  { "/dev/fb/1",    FAKEDEV_FB1 },
  { "/dev/mmuhack", FAKEDEV_MMUHACK },
  { "/dev/tty",     FAKEDEV_TTY0 },
  { "/dev/tty0",    FAKEDEV_TTY0 },
#ifdef PND
  { "/dev/input/event*", -1 }, // hide for now, may cause dupe events
#endif
};

static int w_open(const char *pathname, int flags, mode_t mode)
{
  int i, ret;

  for (i = 0; i < ARRAY_SIZE(takeover_devs); i++) {
    const char *p, *oname;
    int len;

    oname = takeover_devs[i].name;
    p = strchr(oname, '*');
    if (p != NULL)
      len = p - oname;
    else
      len = strlen(oname) + 1;

    if (strncmp(pathname, oname, len) == 0) {
      ret = takeover_devs[i].fd;
      break;
    }
  }

  if (i == ARRAY_SIZE(takeover_devs))
    ret = open(pathname, flags, mode);

  if (ret >= 0) {
    for (i = 0; emu_interesting_fds[i].name != NULL; i++) {
      struct dev_fd_t *eifd = &emu_interesting_fds[i];
      if (strcmp(pathname, eifd->name) == 0) {
        eifd->fd = ret;
        if (eifd->open_cb != NULL)
          eifd->open_cb(ret);
        break;
      }
    }
  }

  strace("open(%s) = %d\n", pathname, ret);
  return ret;
}

static void *w_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
  void *ret;
  if (FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY)
    ret = emu_do_mmap(length, prot, flags, fd, offset);
  else
    ret = mmap(addr, length, prot, flags, fd, offset);

  // threads are using heap before they mmap their stack
  // printf needs valid stack for pthread/errno
  if (((long)&ret & 0xf0000000) == 0xb0000000)
    strace("mmap(%p, %x, %x, %x, %d, %lx) = %p\n", addr, length, prot, flags, fd, (long)offset, ret);
  return ret;
}
#define w_mmap2 w_mmap

static int w_munmap(void *addr, size_t length)
{
  int ret;
  ret = emu_do_munmap(addr, length);
  if (ret == -EAGAIN)
    ret = munmap(addr, length);

  if (((long)&ret & 0xf0000000) == 0xb0000000)
    strace("munmap(%p, %x) = %d\n", addr, length, ret);
  return ret;
}

static ssize_t w_read(int fd, void *buf, size_t count)
{
  ssize_t ret;
  if (fd == FAKEDEV_GPIO)
    ret = emu_read_gpiodev(buf, count);
  else
    ret = read(fd, buf, count);

  //strace("read(%d, %p, %d) = %d\n", fd, buf, count, ret);
  return ret;
}

static int w_ioctl(int fd, int request, void *argp)
{
  int ret;

  if ((FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY) ||
      fd == emu_interesting_fds[IFD_SOUND].fd)
    ret = emu_do_ioctl(fd, request, argp);
  else
    ret = ioctl(fd, request, argp);

  strace("ioctl(%d, %08x, %p) = %d\n", fd, request, argp, ret);
  return ret;
}

static int w_sigaction(int signum, const void *act, void *oldact)
{
  strace("sigaction(%d, %p, %p) = %d\n", signum, act, oldact, 0);
  return 0;
}

/* dynamic only */
static UNUSED int w_tcgetattr(int fd, struct termios *termios_p)
{
  int ret;
  if (fd != FAKEDEV_TTY0)
    ret = tcgetattr(fd, termios_p);
  else
    ret = 0;

  strace("tcgetattr(%d, %p) = %d\n", fd, termios_p, ret);
  return ret;
}

static UNUSED int w_tcsetattr(int fd, int optional_actions,
                       const struct termios *termios_p)
{
  int ret;
  if (fd != FAKEDEV_TTY0)
    ret = tcsetattr(fd, optional_actions, termios_p);
  else
    ret = 0;

  strace("tcsetattr(%d, %x, %p) = %d\n", fd, optional_actions, termios_p, ret);
  return ret;
}

static UNUSED FILE *w_fopen(const char *path, const char *mode)
{
  FILE *ret = emu_do_fopen(path, mode);
  strace("fopen(%s, %s) = %p\n", path, mode, ret);
  return ret;
}

static UNUSED int w_system(const char *command)
{
  int ret = emu_do_system(command);
  strace("system(%s) = %d\n", command, ret);
  return ret;
}

extern char **environ;

static UNUSED int w_execl(const char *path, const char *arg, ...)
{
  // don't allow exec (for now)
  strace("execl(%s, %s, ...) = ?\n", path, arg);
  exit(1);
}

static UNUSED int w_execlp(const char *file, const char *arg, ...)
{
  strace("execlp(%s, %s, ...) = ?\n", file, arg);
  exit(1);
}

static UNUSED int w_execle(const char *path, const char *arg, ...)
{
  strace("execle(%s, %s, ...) = ?\n", path, arg);
  exit(1);
}

static UNUSED int w_execv(const char *path, char *const argv[])
{
  strace("execv(%s, %p) = ?\n", path, argv);
  return emu_do_execve(path, argv, environ);
}

static UNUSED int w_execvp(const char *file, char *const argv[])
{
  strace("execvp(%s, %p) = ?\n", file, argv);
  return emu_do_execve(file, argv, environ);
}

// static note: this can't safely return because of the way it's patched in
// static note2: can't be used, execve hangs?
static UNUSED int w_execve(const char *filename, char *const argv[],
                  char *const envp[])
{
  strace("execve(%s, %p, %p) = ?\n", filename, argv, envp);
  return emu_do_execve(filename, argv, envp);
}

static int w_chdir(const char *path)
{
  int ret;
  if (path != NULL && strstr(path, "/usr/gp2x") != NULL)
    ret = 0;
  else
    ret = chdir(path);
  strace("chdir(%s) = %d\n", path, ret);
  return ret;
}

#undef open
#undef fopen
#undef mmap
#undef munmap
#undef read
#undef ioctl
#undef sigaction
#undef tcgetattr
#undef tcsetattr
#undef system
#undef execl
#undef execlp
#undef execle
#undef execv
#undef execvp
#undef execve
#undef chdir

#ifdef DL

#define MAKE_WRAP_SYM_N(sym) \
  /* alias wrap symbols to real names */ \
  typeof(sym) sym __attribute__((alias("w_" #sym)))

#define MAKE_WRAP_SYM(sym) \
  MAKE_WRAP_SYM_N(sym); \
  /* wrapper to real functions, to be set up on load */ \
  static typeof(sym) *p_real_##sym

// note: update symver too
MAKE_WRAP_SYM(open);
MAKE_WRAP_SYM(fopen);
MAKE_WRAP_SYM(mmap);
MAKE_WRAP_SYM(munmap);
MAKE_WRAP_SYM(read);
MAKE_WRAP_SYM(ioctl);
MAKE_WRAP_SYM(sigaction);
MAKE_WRAP_SYM(tcgetattr);
MAKE_WRAP_SYM(tcsetattr);
MAKE_WRAP_SYM(system);
MAKE_WRAP_SYM_N(execl);
MAKE_WRAP_SYM_N(execlp);
MAKE_WRAP_SYM_N(execle);
MAKE_WRAP_SYM_N(execv);
MAKE_WRAP_SYM_N(execvp);
MAKE_WRAP_SYM(execve);
MAKE_WRAP_SYM(chdir);
typeof(mmap) mmap2 __attribute__((alias("w_mmap")));

#define REAL_FUNC_NP(name) \
  { #name, (void **)&p_real_##name }

static const struct {
  const char *name;
  void **func_ptr;
} real_funcs_np[] = {
  REAL_FUNC_NP(open),
  REAL_FUNC_NP(fopen),
  REAL_FUNC_NP(mmap),
  REAL_FUNC_NP(munmap),
  REAL_FUNC_NP(read),
  REAL_FUNC_NP(ioctl),
  REAL_FUNC_NP(sigaction),
  REAL_FUNC_NP(tcgetattr),
  REAL_FUNC_NP(tcsetattr),
  REAL_FUNC_NP(system),
  // exec* - skipped
  REAL_FUNC_NP(execve),
  REAL_FUNC_NP(chdir),
};

#define open p_real_open
#define fopen p_real_fopen
#define mmap p_real_mmap
#define munmap p_real_munmap
#define read p_real_read
#define ioctl p_real_ioctl
#define sigaction p_real_sigaction
#define tcgetattr p_real_tcgetattr
#define tcsetattr p_real_tcsetattr
#define system p_real_system
#define execve p_real_execve
#define chdir p_real_chdir

#undef MAKE_WRAP_SYM
#undef REAL_FUNC_NP

#endif

// just call real funcs for static, pointer for dynamic
int real_open(const char *pathname, int flags, ...)
{
  va_list ap;
  mode_t mode;

  va_start(ap, flags);
  mode = va_arg(ap, mode_t);
  va_end(ap);
  return open(pathname, flags, mode);
}

FILE *real_fopen(const char *path, const char *mode)
{
  return fopen(path, mode);
}

void *real_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
  return mmap(addr, length, prot, flags, fd, offset);
}

int real_munmap(void *addr, size_t length)
{
  return munmap(addr, length);
}

int real_read(int fd, void *buf, size_t count)
{
  return read(fd, buf, count);
}

int real_ioctl(int d, int request, void *argp)
{
  return ioctl(d, request, argp);
}

int real_sigaction(int signum, const sigaction_t *act, sigaction_t *oldact)
{
  return sigaction(signum, act, oldact);
}

int real_tcgetattr(int fd, struct termios *termios_p)
{
  return tcgetattr(fd, termios_p);
}

int real_tcsetattr(int fd, int optional_actions,
                       const struct termios *termios_p)
{
  return tcsetattr(fd, optional_actions, termios_p);
}

int real_system(const char *command)
{
  return system(command);
}

// real_exec* is missing intentionally - we don't need them

int real_execve(const char *filename, char *const argv[],
                  char *const envp[])
{
  return execve(filename, argv, envp);
}

int real_chdir(const char *path)
{
  return chdir(path);
}

// vim:shiftwidth=2:expandtab
Commit	Line	Data
499bf01c	1	/*
	2	* GINGE - GINGE Is Not Gp2x Emulator
	3	* (C) notaz, 2010-2011
	4	*
	5	* This work is licensed under the MAME license, see COPYING file for details.
	6	*/
7fd42181	7	#include <stdio.h>
7fd42181	8	#include <stdlib.h>
4d045184	9	#include <stdarg.h>
7fd42181	10	#include <string.h>
	11	#include <sys/types.h>
	12	#include <sys/stat.h>
	13	#include <fcntl.h>
	14	#include <sys/mman.h>
	15	#include <unistd.h>
	16	#include <sys/ioctl.h>
	17	#include <signal.h>
	18	#include <termios.h>
3ef07128	19	#include <errno.h>
7fd42181	20
	21	#include "realfuncs.h"
	22	#include "header.h"
	23
	24	#if (DBG & 1)
	25	#define strace printf
	26	#else
	27	#define strace(...)
	28	#endif
	29
	30	#define UNUSED __attribute__((unused))
	31
	32	static const struct dev_fd_t takeover_devs[] = {
	33	{ "/dev/mem", FAKEDEV_MEM },
	34	{ "/dev/GPIO", FAKEDEV_GPIO },
	35	{ "/dev/fb0", FAKEDEV_FB0 },
	36	{ "/dev/fb/0", FAKEDEV_FB0 },
	37	{ "/dev/fb1", FAKEDEV_FB1 },
	38	{ "/dev/fb/1", FAKEDEV_FB1 },
	39	{ "/dev/mmuhack", FAKEDEV_MMUHACK },
ac8e92a4	40	{ "/dev/tty", FAKEDEV_TTY0 },
7fd42181	41	{ "/dev/tty0", FAKEDEV_TTY0 },
7000b522	42	#ifdef PND
	43	{ "/dev/input/event*", -1 }, // hide for now, may cause dupe events
	44	#endif
7fd42181	45	};
	46
	47	static int w_open(const char *pathname, int flags, mode_t mode)
	48	{
	49	int i, ret;
	50
	51	for (i = 0; i < ARRAY_SIZE(takeover_devs); i++) {
7000b522	52	const char p, oname;
	53	int len;
	54
	55	oname = takeover_devs[i].name;
	56	p = strchr(oname, '*');
	57	if (p != NULL)
	58	len = p - oname;
	59	else
	60	len = strlen(oname) + 1;
	61
	62	if (strncmp(pathname, oname, len) == 0) {
7fd42181	63	ret = takeover_devs[i].fd;
	64	break;
	65	}
	66	}
	67
	68	if (i == ARRAY_SIZE(takeover_devs))
	69	ret = open(pathname, flags, mode);
	70
	71	if (ret >= 0) {
	72	for (i = 0; emu_interesting_fds[i].name != NULL; i++) {
7000b522	73	struct dev_fd_t *eifd = &emu_interesting_fds[i];
	74	if (strcmp(pathname, eifd->name) == 0) {
	75	eifd->fd = ret;
	76	if (eifd->open_cb != NULL)
	77	eifd->open_cb(ret);
7fd42181	78	break;
	79	}
	80	}
	81	}
	82
	83	strace("open(%s) = %d\n", pathname, ret);
	84	return ret;
	85	}
	86
	87	static void w_mmap(void addr, size_t length, int prot, int flags, int fd, off_t offset)
	88	{
	89	void *ret;
	90	if (FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY)
	91	ret = emu_do_mmap(length, prot, flags, fd, offset);
	92	else
	93	ret = mmap(addr, length, prot, flags, fd, offset);
	94
	95	// threads are using heap before they mmap their stack
	96	// printf needs valid stack for pthread/errno
	97	if (((long)&ret & 0xf0000000) == 0xb0000000)
	98	strace("mmap(%p, %x, %x, %x, %d, %lx) = %p\n", addr, length, prot, flags, fd, (long)offset, ret);
	99	return ret;
	100	}
	101	#define w_mmap2 w_mmap
	102
3ef07128	103	static int w_munmap(void *addr, size_t length)
	104	{
	105	int ret;
	106	ret = emu_do_munmap(addr, length);
	107	if (ret == -EAGAIN)
	108	ret = munmap(addr, length);
	109
	110	if (((long)&ret & 0xf0000000) == 0xb0000000)
	111	strace("munmap(%p, %x) = %d\n", addr, length, ret);
	112	return ret;
	113	}
	114
7fd42181	115	static ssize_t w_read(int fd, void *buf, size_t count)
	116	{
	117	ssize_t ret;
	118	if (fd == FAKEDEV_GPIO)
	119	ret = emu_read_gpiodev(buf, count);
	120	else
	121	ret = read(fd, buf, count);
	122
	123	//strace("read(%d, %p, %d) = %d\n", fd, buf, count, ret);
	124	return ret;
	125	}
	126
	127	static int w_ioctl(int fd, int request, void *argp)
	128	{
	129	int ret;
	130
	131	if ((FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY) \|\|
	132	fd == emu_interesting_fds[IFD_SOUND].fd)
	133	ret = emu_do_ioctl(fd, request, argp);
	134	else
	135	ret = ioctl(fd, request, argp);
	136
	137	strace("ioctl(%d, %08x, %p) = %d\n", fd, request, argp, ret);
	138	return ret;
	139	}
	140
	141	static int w_sigaction(int signum, const void act, void oldact)
	142	{
	143	strace("sigaction(%d, %p, %p) = %d\n", signum, act, oldact, 0);
	144	return 0;
	145	}
	146
	147	/* dynamic only */
	148	static UNUSED int w_tcgetattr(int fd, struct termios *termios_p)
	149	{
	150	int ret;
	151	if (fd != FAKEDEV_TTY0)
	152	ret = tcgetattr(fd, termios_p);
	153	else
	154	ret = 0;
	155
	156	strace("tcgetattr(%d, %p) = %d\n", fd, termios_p, ret);
	157	return ret;
	158	}
	159
	160	static UNUSED int w_tcsetattr(int fd, int optional_actions,
	161	const struct termios *termios_p)
	162	{
	163	int ret;
	164	if (fd != FAKEDEV_TTY0)
	165	ret = tcsetattr(fd, optional_actions, termios_p);
	166	else
	167	ret = 0;
	168
	169	strace("tcsetattr(%d, %x, %p) = %d\n", fd, optional_actions, termios_p, ret);
	170	return ret;
	171	}
	172
	173	static UNUSED FILE w_fopen(const char path, const char *mode)
	174	{
	175	FILE *ret = emu_do_fopen(path, mode);
	176	strace("fopen(%s, %s) = %p\n", path, mode, ret);
	177	return ret;
	178	}
179
180	static UNUSED int w_system(const char *command)
181	{
182	int ret = emu_do_system(command);
183	strace("system(%s) = %d\n", command, ret);
184	return ret;
185	}
186
7000b522	187	extern char **environ;
7000b522	188
db9191ed	189	static UNUSED int w_execl(const char path, const char arg, ...)
	190	{
	191	// don't allow exec (for now)
	192	strace("execl(%s, %s, ...) = ?\n", path, arg);
7000b522	193	exit(1);
db9191ed	194	}
	195
	196	static UNUSED int w_execlp(const char file, const char arg, ...)
	197	{
	198	strace("execlp(%s, %s, ...) = ?\n", file, arg);
7000b522	199	exit(1);
	200	}
	201
	202	static UNUSED int w_execle(const char path, const char arg, ...)
	203	{
	204	strace("execle(%s, %s, ...) = ?\n", path, arg);
	205	exit(1);
	206	}
	207
	208	static UNUSED int w_execv(const char path, char const argv[])
	209	{
	210	strace("execv(%s, %p) = ?\n", path, argv);
	211	return emu_do_execve(path, argv, environ);
	212	}
	213
	214	static UNUSED int w_execvp(const char file, char const argv[])
	215	{
	216	strace("execvp(%s, %p) = ?\n", file, argv);
	217	return emu_do_execve(file, argv, environ);
db9191ed	218	}
	219
	220	// static note: this can't safely return because of the way it's patched in
	221	// static note2: can't be used, execve hangs?
	222	static UNUSED int w_execve(const char filename, char const argv[],
	223	char *const envp[])
	224	{
	225	strace("execve(%s, %p, %p) = ?\n", filename, argv, envp);
7000b522	226	return emu_do_execve(filename, argv, envp);
db9191ed	227	}
	228
	229	static int w_chdir(const char *path)
	230	{
	231	int ret;
	232	if (path != NULL && strstr(path, "/usr/gp2x") != NULL)
	233	ret = 0;
	234	else
	235	ret = chdir(path);
	236	strace("chdir(%s) = %d\n", path, ret);
	237	return ret;
	238	}
	239
7fd42181	240	#undef open
	241	#undef fopen
	242	#undef mmap
3ef07128	243	#undef munmap
7fd42181	244	#undef read
	245	#undef ioctl
	246	#undef sigaction
	247	#undef tcgetattr
	248	#undef tcsetattr
	249	#undef system
db9191ed	250	#undef execl
db9191ed	251	#undef execlp
7000b522	252	#undef execle
	253	#undef execv
	254	#undef execvp
db9191ed	255	#undef execve
db9191ed	256	#undef chdir
7fd42181	257
	258	#ifdef DL
	259
db9191ed	260	#define MAKE_WRAP_SYM_N(sym) \
7fd42181	261	/* alias wrap symbols to real names */ \
db9191ed	262	typeof(sym) sym __attribute__((alias("w_" #sym)))
	263
	264	#define MAKE_WRAP_SYM(sym) \
	265	MAKE_WRAP_SYM_N(sym); \
7fd42181	266	/* wrapper to real functions, to be set up on load */ \
	267	static typeof(sym) *p_real_##sym
	268
4d045184	269	// note: update symver too
7fd42181	270	MAKE_WRAP_SYM(open);
	271	MAKE_WRAP_SYM(fopen);
	272	MAKE_WRAP_SYM(mmap);
3ef07128	273	MAKE_WRAP_SYM(munmap);
7fd42181	274	MAKE_WRAP_SYM(read);
	275	MAKE_WRAP_SYM(ioctl);
	276	MAKE_WRAP_SYM(sigaction);
	277	MAKE_WRAP_SYM(tcgetattr);
	278	MAKE_WRAP_SYM(tcsetattr);
	279	MAKE_WRAP_SYM(system);
db9191ed	280	MAKE_WRAP_SYM_N(execl);
db9191ed	281	MAKE_WRAP_SYM_N(execlp);
7000b522	282	MAKE_WRAP_SYM_N(execle);
	283	MAKE_WRAP_SYM_N(execv);
	284	MAKE_WRAP_SYM_N(execvp);
db9191ed	285	MAKE_WRAP_SYM(execve);
db9191ed	286	MAKE_WRAP_SYM(chdir);
7fd42181	287	typeof(mmap) mmap2 __attribute__((alias("w_mmap")));
	288
	289	#define REAL_FUNC_NP(name) \
	290	{ #name, (void **)&p_real_##name }
	291
	292	static const struct {
	293	const char *name;
	294	void **func_ptr;
	295	} real_funcs_np[] = {
	296	REAL_FUNC_NP(open),
	297	REAL_FUNC_NP(fopen),
	298	REAL_FUNC_NP(mmap),
3ef07128	299	REAL_FUNC_NP(munmap),
7fd42181	300	REAL_FUNC_NP(read),
	301	REAL_FUNC_NP(ioctl),
	302	REAL_FUNC_NP(sigaction),
	303	REAL_FUNC_NP(tcgetattr),
	304	REAL_FUNC_NP(tcsetattr),
	305	REAL_FUNC_NP(system),
db9191ed	306	// exec* - skipped
	307	REAL_FUNC_NP(execve),
	308	REAL_FUNC_NP(chdir),
7fd42181	309	};
	310
	311	#define open p_real_open
	312	#define fopen p_real_fopen
	313	#define mmap p_real_mmap
3ef07128	314	#define munmap p_real_munmap
7fd42181	315	#define read p_real_read
	316	#define ioctl p_real_ioctl
	317	#define sigaction p_real_sigaction
	318	#define tcgetattr p_real_tcgetattr
	319	#define tcsetattr p_real_tcsetattr
	320	#define system p_real_system
db9191ed	321	#define execve p_real_execve
db9191ed	322	#define chdir p_real_chdir
7fd42181	323
	324	#undef MAKE_WRAP_SYM
	325	#undef REAL_FUNC_NP
	326
	327	#endif
	328
	329	// just call real funcs for static, pointer for dynamic
4d045184	330	int real_open(const char *pathname, int flags, ...)
7fd42181	331	{
4d045184	332	va_list ap;
	333	mode_t mode;
	334
	335	va_start(ap, flags);
	336	mode = va_arg(ap, mode_t);
	337	va_end(ap);
7fd42181	338	return open(pathname, flags, mode);
	339	}
	340
	341	FILE real_fopen(const char path, const char *mode)
	342	{
	343	return fopen(path, mode);
	344	}
	345
	346	void real_mmap(void addr, size_t length, int prot, int flags, int fd, off_t offset)
	347	{
	348	return mmap(addr, length, prot, flags, fd, offset);
	349	}
	350
3ef07128	351	int real_munmap(void *addr, size_t length)
	352	{
	353	return munmap(addr, length);
	354	}
	355
7fd42181	356	int real_read(int fd, void *buf, size_t count)
	357	{
	358	return read(fd, buf, count);
	359	}
	360
	361	int real_ioctl(int d, int request, void *argp)
	362	{
	363	return ioctl(d, request, argp);
	364	}
	365
	366	int real_sigaction(int signum, const sigaction_t act, sigaction_t oldact)
	367	{
	368	return sigaction(signum, act, oldact);
	369	}
	370
	371	int real_tcgetattr(int fd, struct termios *termios_p)
	372	{
	373	return tcgetattr(fd, termios_p);
	374	}
	375
	376	int real_tcsetattr(int fd, int optional_actions,
	377	const struct termios *termios_p)
	378	{
	379	return tcsetattr(fd, optional_actions, termios_p);
	380	}
	381
	382	int real_system(const char *command)
	383	{
	384	return system(command);
	385	}
db9191ed	386
	387	// real_exec* is missing intentionally - we don't need them
	388
	389	int real_execve(const char filename, char const argv[],
	390	char *const envp[])
	391	{
	392	return execve(filename, argv, envp);
	393	}
	394
	395	int real_chdir(const char *path)
	396	{
	397	return chdir(path);
	398	}
499bf01c	399
499bf01c	400	// vim:shiftwidth=2:expandtab