const char *cwd(const char *s)
{
#ifdef UNIX
if (s) {
errno = 0;
if (chdir(s)==-1)
test_file_error(NULL, errno);
}
# ifdef HAVE_GETCWD
assert(getcwd(string_buffer,STRING_BUFFER));
return mm_strdup(string_buffer);
# else
assert(getwd(string_buffer));
return mm_strdup(string_buffer);
# endif
#endif
#ifdef WIN32
char drv[2];
if (s)
errno = 0;
if (_chdir(s)==-1)
test_file_error(NULL, errno);
drv[0]='.'; drv[1]=0;
GetFullPathName(drv, STRING_BUFFER, string_buffer, &s);
return mm_strdup(string_buffer);
#endif
}
char *
cwd(const char *s)
{
#ifdef UNIX
if (s)
{
if (chdir(s)==-1)
test_file_error(NULL);
}
#ifdef HAVE_GETCWD
return getcwd(string_buffer,STRING_BUFFER);
#else
return getwd(string_buffer);
#endif
#endif
#ifdef WIN32
char drv[2];
if (s)
if (_chdir(s)==-1)
test_file_error(NULL);
drv[0]='.'; drv[1]=0;
GetFullPathName(drv, STRING_BUFFER, string_buffer, &s);
return string_buffer;
#endif
}
static int lockfile(const char *filename)
{
errno = 0;
#ifdef WIN32
int fd = _open(filename, _O_RDWR|_O_CREAT|_O_EXCL, 0644);
#else
int fd = open(filename, O_RDWR|O_CREAT|O_EXCL, 0644);
#endif
if (fd<0) {
if (errno==EEXIST)
return 0;
else
test_file_error(NULL, errno);
}
time_t tl;
time(&tl);
#ifdef UNIX
{
char hname[80];
char *user;
gethostname(hname,79);
if (! (user=getenv("USER")))
if (! (user=getenv("LOGNAME")))
user="******";
sprintf(string_buffer,"created by %s@%s (pid=%d)\non %s",
user, hname, (int)getpid(), ctime(&tl));
}
#endif
#ifdef WIN32
{
char user[80];
char computer[80];
int size = sizeof(user);
if (! (GetUserName(user,&size)))
strcpy(user,"<unknown>");
size = sizeof(computer);
if (! (GetComputerName(computer,&size)))
strcpy(computer,"<unknown>");
sprintf(string_buffer,"created by %s@%s on %s",
user, computer, time(&tl));
}
#endif
char *s = string_buffer;
size_t n = strlen(s);
while (n > 0) {
ssize_t l = write(fd, s, n);
if (l <= 0) {
close(fd);
test_file_error(NULL, errno);
}
s += l;
n -= l;
}
close(fd);
return 1;
}
storage_t *new_storage_mmap(storage_type_t t, FILE *f, size_t offs, bool ro)
{
storage_t *st = mm_allocv(mt_storage, sizeof(storage_t));
errno = 0;
#if HAVE_FSEEKO
if (fseeko(f,(off_t)0,SEEK_END)==-1)
test_file_error(NULL, errno);
#else
if (fseek(f,0,SEEK_END)==-1)
test_file_error(NULL, errno);
#endif
#if HAVE_FTELLO
size_t len = (size_t)ftello(f);
#else
size_t len = (size_t)ftell(f);
#endif
rewind(f);
if (t==ST_MPTR || t==ST_GPTR)
RAISEF("cannot mmap a pointer storage", st->backptr);
if (t==ST_AT)
RAISEF("cannot mmap an atom-storage", st->backptr);
#ifdef UNIX
errno = 0;
gptr addr = mmap(0,len,(ro ? PROT_READ : PROT_WRITE),MAP_SHARED,fileno(f),0);
if (addr == (void*)-1L)
test_file_error(NULL, errno);
#endif
#ifdef WIN32
gptr xtra, addr;
if (! (xtra = (gptr)CreateFileMapping((HANDLE)(_get_osfhandle(fd)),
NULL, PAGE_READONLY, 0, len, NULL)))
RAISEF("cannot create file mapping",NIL);
if (! (addr = (gptr)MapViewOfFile((HANDLE)(xtra),
FILE_MAP_READ, 0, 0, size + pos)))
RAISEF("cannot create view on mapped file",NIL);
st->mmap_xtra = xtra;
#endif
st->type = t;
st->kind = STS_MMAP;
st->isreadonly = ro;
st->mmap_len = len;
st->mmap_addr = addr;
st->size = (len - offs) / storage_sizeof[st->type];
st->data = (char *)(st->mmap_addr)+offs;
st->backptr = new_at(storage_class[st->type], st);
add_notifier(st, (wr_notify_func_t *)storage_notify, NULL);
return st;
}
static void write32(FILE *f, int x)
{
char c[4];
c[0] = x>>24;
c[1] = x>>16;
c[2] = x>>8;
c[3] = x;
errno = 0;
if (fwrite(&c, sizeof(char), 4, f) != 4)
test_file_error(f, errno);
}
void storage_load(storage_t *st, FILE *f)
{
if (st->type == ST_AT)
RAISEF("cannot load an AT storage", NIL);
if (st->data == NULL) {
assert(st->size == 0);
#if HAVE_FSEEKO
off_t here = ftello(f);
errno = 0;
if (fseeko(f,0,SEEK_END)==-1)
test_file_error(NULL, errno);
off_t len = ftello(f);
errno = 0;
if (fseeko(f,here,SEEK_SET)==-1)
test_file_error(NULL, errno);
#else
off_t here = ftell(f);
errno = 0;
if (fseek(f,0,SEEK_END)==-1)
test_file_error(NULL, errno);
int len = ftell(f);
errno = 0;
if (fseek(f,here,SEEK_SET)==-1)
test_file_error(NULL, errno);
#endif
if (len==0)
return;
else
storage_alloc(st,(size_t)len/storage_sizeof[st->type],0);
}
get_write_permit(st);
char *pt = st->data;
errno = 0;
int nrec = fread(pt, storage_sizeof[st->type], st->size, f);
if (nrec < st->size)
RAISEF("file is too small",NIL);
test_file_error(f, errno);
}
void storage_save(storage_t *st, FILE *f)
{
if (st->type == ST_AT)
RAISEF("cannot save an AT storage",NIL);
if (st->data == NULL)
RAISEF("cannot save an unsized storage",NIL);
char *pt = st->data;
errno = 0;
int nrec = fwrite(pt, storage_sizeof[st->type], st->size, f);
test_file_error(f, errno);
if (nrec < st->size)
RAISEF("storage could not be saved completely",NIL);
}
/* return size of dump file */
static off_t dump(const char *s)
{
/* Build the big list */
at *ans = NIL, **where = &ans;
/* 1 - the modules */
at *p = module_list();
at *q = p;
while (CONSP(q)) {
*where = new_cons(Car(q), NIL);
where = &Cdr(*where);
q = Cdr(q);
}
/* 2- the globals */
*where = global_defs();
/* Header */
at *atf = OPEN_WRITE(s,"dump");
FILE *f = Gptr(atf);
write32(f, DUMPMAGIC);
write32(f, DUMPVERSION);
/* The macro character map */
errno = 0;
fwrite(char_map,1,256,f);
test_file_error(f, errno);
/* Write the big list */
bool oldready = error_doc.ready_to_an_error;
error_doc.ready_to_an_error = false;
bwrite(ans, f, true);
error_doc.ready_to_an_error = oldready;
lush_delete(atf); /* close file */
/* get file size */
struct stat buf;
if (stat(s, &buf)>=0)
if (S_ISREG(buf.st_mode))
return buf.st_size;
return (off_t)0;
}
