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yap-6.3/library/system/sys.c
vsc 95a113aac9 trail_ref cleanup 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@64 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2001-06-08 14:52:54 +00:00

770 lines
16 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: regexp.c *
* Last rev: *
* mods: *
* comments: regular expression interpreter *
* *
*************************************************************************/
#include "config.h"
#include "c_interface.h"
#if STDC_HEADERS
#include <stdlib.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#if HAVE_TIME_H
#include <time.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_SIGNAL_H
#include <signal.h>
#endif
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#if HAVE_DIRENT_H
#include <dirent.h>
#endif
#if HAVE_DIRECT_H
#include <direct.h>
#endif
#if defined(__MINGW32__) || _MSC_VER
#include <windows.h>
#include <process.h>
#endif
#ifdef __MINGW32__
#ifdef HAVE_ENVIRON
#undef HAVE_ENVIRON
#endif
#endif
void PROTO(init_sys, (void));
#if defined(__MINGW32__) || _MSC_VER
static Term
WinError(void)
{
char msg[256];
/* Error, we could not read time */
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), msg, 256,
NULL);
return(MkAtomTerm(LookupAtom(msg)));
}
#endif
/* Return time in a structure */
static int
datime(void)
{
Term tf, out[6];
#if defined(__MINGW32__) || _MSC_VER
SYSTEMTIME stime;
GetLocalTime(&stime);
out[0] = MkIntTerm(stime.wYear);
out[1] = MkIntTerm(stime.wMonth);
out[2] = MkIntTerm(stime.wDay);
out[3] = MkIntTerm(stime.wHour);
out[4] = MkIntTerm(stime.wMinute);
out[5] = MkIntTerm(stime.wSecond);
#elif HAVE_TIME
time_t tp;
if ((tp = time(NULL)) == -1) {
return(unify(ARG2, MkIntTerm(errno)));
}
#ifdef HAVE_LOCALTIME
{
struct tm *loc = localtime(&tp);
if (loc == NULL) {
return(unify(ARG2, MkIntTerm(errno)));
}
out[0] = MkIntTerm(1900+loc->tm_year);
out[1] = MkIntTerm(1+loc->tm_mon);
out[2] = MkIntTerm(loc->tm_mday);
out[3] = MkIntTerm(loc->tm_hour);
out[4] = MkIntTerm(loc->tm_min);
out[5] = MkIntTerm(loc->tm_sec);
}
#else
oops
#endif /* HAVE_LOCALTIME */
#else
oops
#endif /* HAVE_TIME */
tf = MkApplTerm(MkFunctor(LookupAtom("datime"),6), 6, out);
return(unify(ARG1, tf));
}
#define BUF_SIZE 1024
/* Return a list of files for a directory */
static int
list_directory(void)
{
Term tf = MkAtomTerm(LookupAtom("[]"));
char *buf = AtomName(AtomOfTerm(ARG1));
#if defined(__MINGW32__) || _MSC_VER
struct _finddata_t c_file;
char bs[BUF_SIZE];
long hFile;
bs[0] = '\0';
#if HAVE_STRNCPY
strncpy(bs, buf, BUF_SIZE);
#else
strcpy(bs, buf);
#endif
#if HAVE_STRNCAT
strncat(bs, "/*", BUF_SIZE);
#else
strncat(bs, "/*");
#endif
if ((hFile = _findfirst(bs, &c_file)) == -1L) {
return(unify(ARG2,tf));
}
tf = MkPairTerm(MkAtomTerm(LookupAtom(c_file.name)), tf);
while (_findnext( hFile, &c_file) == 0) {
Term ti = MkAtomTerm(LookupAtom(c_file.name));
tf = MkPairTerm(ti, tf);
}
_findclose( hFile );
#else
#if HAVE_OPENDIR
{
DIR *de;
struct dirent *dp;
if ((de = opendir(buf)) == NULL) {
return(unify(ARG3, MkIntTerm(errno)));
}
while ((dp = readdir(de))) {
Term ti = MkAtomTerm(LookupAtom(dp->d_name));
tf = MkPairTerm(ti, tf);
}
closedir(de);
}
#endif /* HAVE_OPENDIR */
#endif
return(unify(ARG2, tf));
}
static int
p_unlink(void)
{
char *fd = AtomName(AtomOfTerm(ARG1));
#if defined(__MINGW32__) || _MSC_VER
if (_unlink(fd) == -1)
#else
if (unlink(fd) == -1)
#endif
{
/* return an error number */
return(unify(ARG2, MkIntTerm(errno)));
}
return(TRUE);
}
static int
p_mkdir(void)
{
char *fd = AtomName(AtomOfTerm(ARG1));
#if defined(__MINGW32__) || _MSC_VER
if (_mkdir(fd) == -1) {
#else
if (mkdir(fd, 0777) == -1) {
#endif
/* return an error number */
return(unify(ARG2, MkIntTerm(errno)));
}
return(TRUE);
}
static int
p_rmdir(void)
{
char *fd = AtomName(AtomOfTerm(ARG1));
#if defined(__MINGW32__) || _MSC_VER
if (_rmdir(fd) == -1) {
#else
if (rmdir(fd) == -1) {
#endif
/* return an error number */
return(unify(ARG2, MkIntTerm(errno)));
}
return(TRUE);
}
static int
rename_file(void)
{
char *s1 = AtomName(AtomOfTerm(ARG1));
char *s2 = AtomName(AtomOfTerm(ARG2));
#if HAVE_RENAME
if (rename(s1, s2) == -1) {
/* return an error number */
return(unify(ARG3, MkIntTerm(errno)));
}
#endif
return(TRUE);
}
static int
dir_separator(void)
{
return(unify(ARG1,MkAtomTerm(LookupAtom("/"))));
}
static int
file_property(void)
{
char *fd;
#if HAVE_LSTAT
struct stat buf;
fd = AtomName(AtomOfTerm(ARG1));
if (lstat(fd, &buf) == -1) {
/* return an error number */
return(unify(ARG6, MkIntTerm(errno)));
}
if (S_ISREG(buf.st_mode))
unify(ARG2, MkAtomTerm(LookupAtom("regular")));
else if (S_ISDIR(buf.st_mode))
unify(ARG2, MkAtomTerm(LookupAtom("directory")));
else if (S_ISFIFO(buf.st_mode))
unify(ARG2, MkAtomTerm(LookupAtom("fifo")));
else if (S_ISLNK(buf.st_mode))
unify(ARG2, MkAtomTerm(LookupAtom("symlink")));
else if (S_ISSOCK(buf.st_mode))
unify(ARG2, MkAtomTerm(LookupAtom("socket")));
else
unify(ARG2, MkAtomTerm(LookupAtom("unknown")));
#elif defined(__MINGW32__) || _MSC_VER
/* for some weird reason _stat did not work with mingw32 */
struct stat buf;
fd = AtomName(AtomOfTerm(ARG1));
if (stat(fd, &buf) != 0) {
/* return an error number */
return(unify(ARG6, MkIntTerm(errno)));
}
if (buf.st_mode & S_IFREG)
unify(ARG2, MkAtomTerm(LookupAtom("regular")));
else if (buf.st_mode & S_IFDIR)
unify(ARG2, MkAtomTerm(LookupAtom("directory")));
else
unify(ARG2, MkAtomTerm(LookupAtom("unknown")));
#endif
unify(ARG3, MkIntTerm(buf.st_size));
unify(ARG4, MkIntTerm(buf.st_mtime));
unify(ARG5, MkIntTerm(buf.st_mode));
return(TRUE);
}
/* temporary files */
static int
p_mktemp(void)
{
#if HAVE_MKTEMP
char *s, tmp[1024];
s = AtomName(AtomOfTerm(ARG1));
#if HAVE_STRNCPY
strncpy(tmp, s, 1024);
#else
strcpy(tmp, s);
#endif
#if defined(__MINGW32__) || _MSC_VER
if ((s = _mktemp(tmp)) == NULL) {
#else
if ((s = mktemp(tmp)) == NULL) {
#endif
/* return an error number */
return(unify(ARG3, MkIntTerm(errno)));
}
return(unify(ARG2,MkAtomTerm(LookupAtom(s))));
#else
oops
#endif
return(TRUE);
}
static int
p_tpmnam(void)
{
#if HAVE_TMPNAM
return(unify(ARG1,MkAtomTerm(LookupAtom(tmpnam(NULL)))));
#else
oops
#endif
}
/* return YAP's environment */
static int
p_environ(void)
{
#if HAVE_ENVIRON
#if defined(__MINGW32__) || _MSC_VER
extern char **_environ;
#else
extern char **environ;
#endif
Term t1 = ARG1;
Int i;
i = IntOfTerm(t1);
#if defined(__MINGW32__) || _MSC_VER
if (_environ[i] == NULL)
#else
if (environ[i] == NULL)
#endif
return(FALSE);
else {
Term t = BufferToString(environ[i]);
return(unify(t, ARG2));
}
#else
YapError("environ not available in this configuration");
return(FALSE);
#endif
}
#if defined(__MINGW32__) || _MSC_VER
static int
get_handle(Term ti, int fd, Term tzero)
{
if (ti == tzero) {
int new_fd = _dup(fd);
_close(fd);
return(new_fd);
} else {
int sd = YapStreamToFileNo(ti), new_fd;
if (sd == fd)
return(-1);
new_fd = _dup(fd);
_close(fd);
_dup2(sd, fd);
return(new_fd);
}
}
static void
restore_descriptor(int fd0, int fd, Term t, Term tzero)
{
if (fd != -1) {
if (t != tzero) {
_close(fd0);
}
_dup2(fd, fd0);
}
}
#endif
/* execute a command as a detached process */
static int
execute_command(void)
{
Term ti = ARG2, to = ARG3, te = ARG4;
Term tzero = MkIntTerm(0);
int res;
int inpf, outf, errf;
#if defined(__MINGW32__) || _MSC_VER
DWORD CreationFlags = 0;
STARTUPINFO StartupInfo;
PROCESS_INFORMATION ProcessInformation;
inpf = get_handle(ti, 0, tzero);
outf = get_handle(to, 1, tzero);
errf = get_handle(te, 2, tzero);
if (inpf == -1 && outf == -1 && errf == -1) {
/* we do not keep a curent stream */
CreationFlags = DETACHED_PROCESS;
}
StartupInfo.cb = sizeof(STARTUPINFO);
StartupInfo.lpReserved = NULL;
StartupInfo.lpDesktop = NULL; /* inherit */
StartupInfo.lpTitle = NULL; /* we do not create a new console window */
StartupInfo.dwFlags = STARTF_USESTDHANDLES;
StartupInfo.cbReserved2 = 0;
StartupInfo.lpReserved2 = NULL;
StartupInfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
StartupInfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
StartupInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
/* got stdin, stdout and error as I like it */
if (CreateProcess(NULL,
AtomName(AtomOfTerm(ARG1)),
NULL,
NULL,
TRUE,
CreationFlags,
NULL,
NULL,
&StartupInfo,
&ProcessInformation) == FALSE) {
return(unify(ARG6, WinError()));
}
restore_descriptor(0, inpf, ti, tzero);
restore_descriptor(1, outf, to, tzero);
restore_descriptor(2, errf, te, tzero);
res = ProcessInformation.dwProcessId;
return(unify(ARG5,MkIntTerm(res)));
#else /* UNIX CODE */
/* process input first */
if (ti == tzero) {
inpf = open("/dev/null", O_RDONLY);
} else {
int sd = YapStreamToFileNo(ti);
inpf = dup(sd);
}
if (inpf < 0) {
/* return an error number */
return(unify(ARG6, MkIntTerm(errno)));
}
/* then output stream */
if (to == tzero) {
outf = open("/dev/zero", O_WRONLY);
} else {
int sd = YapStreamToFileNo(to);
outf = dup(sd);
}
if (outf < 0) {
/* return an error number */
return(unify(ARG6, MkIntTerm(errno)));
}
/* then error stream */
if (te == tzero) {
errf = open("/dev/zero", O_WRONLY);
} else {
int sd = YapStreamToFileNo(te);
errf = dup(sd);
}
if (errf < 0) {
/* return an error number */
return(unify(ARG6, MkIntTerm(errno)));
}
/* we are now ready to fork */
if ((res = fork()) < 0) {
/* close streams we don't need */
close(inpf);
close(outf);
close(errf);
/* return an error number */
return(unify(ARG6, MkIntTerm(errno)));
} else if (res == 0) {
char *argv[4];
/* child */
/* close current streams, but not std streams */
YapCloseAllOpenStreams();
close(0);
dup(inpf);
close(1);
dup(outf);
close(2);
dup(outf);
close(inpf);
close(outf);
close(errf);
argv[0] = "sh";
argv[1] = "-c";
argv[2] = AtomName(AtomOfTerm(ARG1));
argv[3] = NULL;
execv("/bin/sh", argv);
exit(127);
/* we have the streams where we want them, just want to execute now */
} else {
close(inpf);
close(outf);
close(errf);
return(unify(ARG5,MkIntTerm(res)));
}
#endif /* UNIX code */
}
/* execute a command as a detached process */
static int
do_system(void)
{
char *command = AtomName(AtomOfTerm(ARG1));
int sys = system(command);
#if HAVE_SYSTEM
return(unify(ARG2, MkIntTerm(sys)));
#endif
}
/* execute a command as a detached process */
static int
p_wait(void)
{
Int pid = IntOfTerm(ARG1);
#if defined(__MINGW32__) || _MSC_VER
HANDLE proc = OpenProcess(STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE, FALSE, pid);
DWORD ExitCode;
if (proc == NULL) {
return(unify(ARG3, WinError()));
}
if (WaitForSingleObject(proc, INFINITE) == WAIT_FAILED) {
return(unify(ARG3, WinError()));
}
if (GetExitCodeProcess(proc, &ExitCode) == 0) {
return(unify(ARG3, WinError()));
}
CloseHandle(proc);
return(unify(ARG2, MkIntTerm(ExitCode)));
#else
do {
int status;
/* check for interruptions */
if (waitpid(pid, &status, 0) == -1) {
if (errno != EINTR)
return -1;
return(unify(ARG3, MkIntTerm(errno)));
} else {
return(unify(ARG2, MkIntTerm(status)));
}
} while(TRUE);
#endif
}
/* execute a command as a detached process */
static int
p_popen(void)
{
char *command = AtomName(AtomOfTerm(ARG1));
Int mode = IntOfTerm(ARG2);
FILE *pfd;
Term tsno;
int flags;
#if HAVE_POPEN
#if defined(__MINGW32__) || _MSC_VER
/* This will only work for console applications. FIX */
if (mode == 0)
pfd = _popen(command, "r");
else
pfd = _popen(command, "w");
#else
if (mode == 0)
pfd = popen(command, "r");
else
pfd = popen(command, "w");
#endif
if (pfd == NULL) {
return(unify(ARG4, MkIntTerm(errno)));
}
if (mode == 0)
flags = YAP_INPUT_STREAM | YAP_POPEN_STREAM;
else
flags = YAP_OUTPUT_STREAM | YAP_POPEN_STREAM;
tsno = YapOpenStream((void *)pfd,
"pipe",
MkAtomTerm(LookupAtom("pipe")),
flags);
#endif
return(unify(ARG3, tsno));
}
static int
p_sleep(void)
{
Term ts = ARG1;
Int secs = 0, usecs = 0, out;
if (IsIntTerm(ts)) {
secs = IntOfTerm(ts);
} else if (IsFloatTerm(ts)) {
flt tfl = FloatOfTerm(ts);
if (tfl > 1.0)
secs = tfl;
else
usecs = tfl*1000;
}
#if defined(__MINGW32__) || _MSC_VER
if (secs) usecs = secs*1000;
Sleep(usecs);
out = 0;
#else
#if HAVE_USLEEP
if (usecs > 0) {
usleep(usecs);
out = 0;
} else
#endif
#if HAVE_SLEEP
{
out = sleep(secs);
}
#endif
#endif /* defined(__MINGW32__) || _MSC_VER */
return(unify(ARG2, MkIntTerm(out)));
}
/* host info */
static int
host_name(void)
{
#if defined(__MINGW32__) || _MSC_VER
char name[MAX_COMPUTERNAME_LENGTH+1];
DWORD nSize = MAX_COMPUTERNAME_LENGTH+1;
if (GetComputerName(name, &nSize) == 0) {
return(unify(ARG2, WinError()));
}
#else
#if HAVE_GETHOSTNAME
char name[256];
if (gethostname(name, 256) == -1) {
/* return an error number */
return(unify(ARG2, MkIntTerm(errno)));
}
#endif
#endif /* defined(__MINGW32__) || _MSC_VER */
return(unify(ARG1, MkAtomTerm(LookupAtom(name))));
}
static int
host_id(void)
{
#if HAVE_GETHOSTID
return(unify(ARG1, MkIntTerm(gethostid())));
#else
return(unify(ARG1, MkIntTerm(0)));
#endif
}
static int
pid(void)
{
#if defined(__MINGW32__) || _MSC_VER
return(unify(ARG1, MkIntTerm(_getpid())));
#else
return(unify(ARG1, MkIntTerm(getpid())));
#endif
}
static int
win(void)
{
#if defined(__MINGW32__) || _MSC_VER
return(TRUE);
#else
return(FALSE);
#endif
}
static int
p_kill(void)
{
#if defined(__MINGW32__) || _MSC_VER
/* Windows does not support cross-process signals, so we shall do the
SICStus thing and assume that a signal to a process will
always kill it */
HANDLE proc = OpenProcess(STANDARD_RIGHTS_REQUIRED|PROCESS_TERMINATE, FALSE, IntOfTerm(ARG1));
if (proc == NULL) {
return(unify(ARG3, WinError()));
}
if (TerminateProcess(proc, -1) == 0) {
return(unify(ARG3, WinError()));
}
CloseHandle(proc);
#else
if (kill(IntOfTerm(ARG1), IntOfTerm(ARG2)) < 0) {
/* return an error number */
return(unify(ARG3, MkIntTerm(errno)));
}
#endif /* defined(__MINGW32__) || _MSC_VER */
return(TRUE);
}
static int
error_message(void)
{
#if HAVE_STRERROR
return(unify(ARG2,MkAtomTerm(LookupAtom(strerror(IntOfTerm(ARG1))))));
#else
#if HAVE_STRERROR
return(unify(ARG2,ARG1));
#endif
#endif
}
void
init_sys(void)
{
UserCPredicate("datime", datime, 2);
UserCPredicate("list_directory", list_directory, 3);
UserCPredicate("file_property", file_property, 6);
UserCPredicate("unlink", p_unlink, 2);
UserCPredicate("mkdir", p_mkdir, 2);
UserCPredicate("rmdir", p_rmdir, 2);
UserCPredicate("dir_separator", dir_separator, 1);
UserCPredicate("p_environ", p_environ, 2);
UserCPredicate("exec_command", execute_command, 6);
UserCPredicate("do_system", do_system, 2);
UserCPredicate("popen", p_popen, 4);
UserCPredicate("wait", p_wait, 3);
UserCPredicate("host_name", host_name, 2);
UserCPredicate("host_id", host_id, 2);
UserCPredicate("pid", pid, 2);
UserCPredicate("kill", p_kill, 3);
UserCPredicate("mktemp", p_mktemp, 3);
UserCPredicate("tmpnam", p_tpmnam, 2);
UserCPredicate("rename_file", rename_file, 3);
UserCPredicate("sleep", p_sleep, 2);
UserCPredicate("error_message", error_message, 2);
UserCPredicate("win", win, 0);
}
#ifdef _WIN32
#include <windows.h>
int WINAPI PROTO(win_sys, (HANDLE, DWORD, LPVOID));
int WINAPI win_sys(HANDLE hinst, DWORD reason, LPVOID reserved)
{
switch (reason)
{
case DLL_PROCESS_ATTACH:
break;
case DLL_PROCESS_DETACH:
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
}
return 1;
}
#endif
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