cpython/Python/sysmodule.c

406 lines
8.9 KiB
C
Raw Normal View History

1991-02-19 08:39:46 -04:00
/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
1991-02-19 08:39:46 -04:00
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.
STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
******************************************************************/
1990-10-14 09:07:46 -03:00
/* System module */
/*
Various bits of information used by the interpreter are collected in
module 'sys'.
1990-12-20 11:06:42 -04:00
Function member:
1995-03-20 11:09:40 -04:00
- exit(sts): raise SystemExit
1990-10-14 09:07:46 -03:00
Data members:
- stdin, stdout, stderr: standard file objects
- modules: the table of modules (dictionary)
1990-12-20 11:06:42 -04:00
- path: module search path (list of strings)
- argv: script arguments (list of strings)
- ps1, ps2: optional primary and secondary prompts (strings)
1990-10-14 09:07:46 -03:00
*/
1990-12-20 11:06:42 -04:00
#include "allobjects.h"
1990-10-14 09:07:46 -03:00
#include "sysmodule.h"
#include "import.h"
#include "modsupport.h"
1992-03-23 14:20:18 -04:00
#include "osdefs.h"
1990-12-20 11:06:42 -04:00
1992-03-23 14:20:18 -04:00
object *sys_trace, *sys_profile;
1995-03-30 07:01:58 -04:00
int sys_checkinterval = 10;
1990-10-14 09:07:46 -03:00
static object *sysdict;
1996-09-11 20:12:24 -03:00
#ifdef MS_COREDLL
extern void *PyWin_DLLhModule;
#endif
1990-10-14 09:07:46 -03:00
object *
sysget(name)
char *name;
{
return dictlookup(sysdict, name);
}
FILE *
sysgetfile(name, def)
char *name;
FILE *def;
{
FILE *fp = NULL;
object *v = sysget(name);
if (v != NULL && is_fileobject(v))
1990-10-14 09:07:46 -03:00
fp = getfilefile(v);
if (fp == NULL)
fp = def;
return fp;
}
int
sysset(name, v)
char *name;
object *v;
{
if (v == NULL) {
if (dictlookup(sysdict, name) == NULL)
return 0;
else
return dictremove(sysdict, name);
}
1990-10-14 09:07:46 -03:00
else
return dictinsert(sysdict, name, v);
}
static object *
sys_exit(self, args)
object *self;
object *args;
{
/* Raise SystemExit so callers may catch it or clean up. */
err_setval(SystemExit, args);
return NULL;
1990-10-14 09:07:46 -03:00
}
1992-03-23 14:20:18 -04:00
static object *
sys_settrace(self, args)
object *self;
object *args;
{
if (args == None)
args = NULL;
else
XINCREF(args);
XDECREF(sys_trace);
1992-03-23 14:20:18 -04:00
sys_trace = args;
INCREF(None);
return None;
}
static object *
sys_setprofile(self, args)
object *self;
object *args;
{
if (args == None)
args = NULL;
else
XINCREF(args);
XDECREF(sys_profile);
1992-03-23 14:20:18 -04:00
sys_profile = args;
INCREF(None);
return None;
}
static object *
sys_setcheckinterval(self, args)
object *self;
object *args;
{
if (!newgetargs(args, "i", &sys_checkinterval))
return NULL;
INCREF(None);
return None;
}
#ifdef USE_MALLOPT
/* Link with -lmalloc (or -lmpc) on an SGI */
#include <malloc.h>
static object *
sys_mdebug(self, args)
object *self;
object *args;
{
int flag;
if (!getargs(args, "i", &flag))
return NULL;
mallopt(M_DEBUG, flag);
INCREF(None);
return None;
}
#endif /* USE_MALLOPT */
static object *
sys_getrefcount(self, args)
object *self;
object *args;
{
object *arg;
if (!getargs(args, "O", &arg))
return NULL;
return newintobject((long) arg->ob_refcnt);
}
#ifdef COUNT_ALLOCS
static PyObject *
sys_getcounts(self, args)
PyObject *self, *args;
{
extern PyObject *get_counts Py_PROTO((void));
if (!PyArg_Parse(args, ""))
return NULL;
return get_counts();
}
#endif
1996-05-23 19:45:41 -03:00
#ifdef Py_TRACE_REFS
/* Defined in objects.c because it uses static globals if that file */
extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *));
#endif
1990-12-20 11:06:42 -04:00
static struct methodlist sys_methods[] = {
1995-02-21 17:03:24 -04:00
{"exit", sys_exit, 0},
{"getrefcount", sys_getrefcount, 0},
#ifdef COUNT_ALLOCS
{"getcounts", sys_getcounts, 0},
#endif
1996-05-23 19:45:41 -03:00
#ifdef Py_TRACE_REFS
{"getobjects", _Py_GetObjects, 1},
#endif
#ifdef USE_MALLOPT
1995-02-21 17:03:24 -04:00
{"mdebug", sys_mdebug, 0},
#endif
1995-02-21 17:03:24 -04:00
{"setprofile", sys_setprofile, 0},
{"settrace", sys_settrace, 0},
1996-01-11 21:15:01 -04:00
{"setcheckinterval", sys_setcheckinterval, 1},
1990-12-20 11:06:42 -04:00
{NULL, NULL} /* sentinel */
};
1990-10-14 09:07:46 -03:00
static object *sysin, *sysout, *syserr;
static object *
list_builtin_module_names()
{
object *list = newlistobject(0);
int i;
if (list == NULL)
return NULL;
for (i = 0; inittab[i].name != NULL; i++) {
object *name = newstringobject(inittab[i].name);
if (name == NULL)
break;
addlistitem(list, name);
DECREF(name);
}
1994-08-30 05:27:36 -03:00
if (sortlist(list) != 0) {
DECREF(list);
list = NULL;
}
return list;
}
1990-10-14 09:07:46 -03:00
void
1990-12-20 11:06:42 -04:00
initsys()
1990-10-14 09:07:46 -03:00
{
1994-08-30 05:27:36 -03:00
extern long getmaxint PROTO((void));
extern char *getversion PROTO((void));
extern char *getcopyright PROTO((void));
1995-07-07 19:45:02 -03:00
extern char *getplatform PROTO((void));
extern char *Py_GetPrefix PROTO((void));
extern char *Py_GetExecPrefix PROTO((void));
extern int fclose PROTO((FILE *));
1990-12-20 11:06:42 -04:00
object *m = initmodule("sys", sys_methods);
1994-08-30 05:27:36 -03:00
object *v;
1990-12-20 11:06:42 -04:00
sysdict = getmoduledict(m);
INCREF(sysdict);
1990-10-14 09:07:46 -03:00
/* NB keep an extra ref to the std files to avoid closing them
when the user deletes them */
sysin = newopenfileobject(stdin, "<stdin>", "r", fclose);
sysout = newopenfileobject(stdout, "<stdout>", "w", fclose);
syserr = newopenfileobject(stderr, "<stderr>", "w", fclose);
1990-10-14 09:07:46 -03:00
if (err_occurred())
1994-08-30 05:27:36 -03:00
fatal("can't initialize sys.std{in,out,err}");
1990-10-14 09:07:46 -03:00
dictinsert(sysdict, "stdin", sysin);
dictinsert(sysdict, "stdout", sysout);
dictinsert(sysdict, "stderr", syserr);
1994-08-30 05:27:36 -03:00
dictinsert(sysdict, "version", v = newstringobject(getversion()));
XDECREF(v);
dictinsert(sysdict, "copyright", v = newstringobject(getcopyright()));
XDECREF(v);
1995-07-07 19:45:02 -03:00
dictinsert(sysdict, "platform", v = newstringobject(getplatform()));
XDECREF(v);
dictinsert(sysdict, "prefix", v = newstringobject(Py_GetPrefix()));
XDECREF(v);
dictinsert(sysdict, "exec_prefix",
v = newstringobject(Py_GetExecPrefix()));
XDECREF(v);
1994-08-30 05:27:36 -03:00
dictinsert(sysdict, "maxint", v = newintobject(getmaxint()));
XDECREF(v);
1990-12-20 11:06:42 -04:00
dictinsert(sysdict, "modules", get_modules());
dictinsert(sysdict, "builtin_module_names",
v = list_builtin_module_names());
XDECREF(v);
1996-08-23 15:14:47 -03:00
#ifdef MS_COREDLL
dictinsert(sysdict, "dllhandle", v = newintobject((int)PyWin_DLLhModule));
XDECREF(v);
1996-08-23 15:14:47 -03:00
dictinsert(sysdict, "winver", v = newstringobject(MS_DLL_ID));
XDECREF(v);
#endif
1990-10-14 09:07:46 -03:00
if (err_occurred())
fatal("can't insert sys.* objects in sys dict");
}
1990-12-20 11:06:42 -04:00
static object *
makepathobject(path, delim)
char *path;
int delim;
{
1990-12-20 11:06:42 -04:00
int i, n;
char *p;
object *v, *w;
n = 1;
p = path;
while ((p = strchr(p, delim)) != NULL) {
n++;
p++;
}
v = newlistobject(n);
if (v == NULL)
return NULL;
for (i = 0; ; i++) {
p = strchr(path, delim);
if (p == NULL)
p = strchr(path, '\0'); /* End of string */
w = newsizedstringobject(path, (int) (p - path));
if (w == NULL) {
DECREF(v);
return NULL;
}
1990-12-20 11:06:42 -04:00
setlistitem(v, i, w);
if (*p == '\0')
break;
path = p+1;
}
1990-12-20 11:06:42 -04:00
return v;
1990-10-14 09:07:46 -03:00
}
void
1990-12-20 11:06:42 -04:00
setpythonpath(path)
char *path;
1990-10-14 09:07:46 -03:00
{
1990-12-20 11:06:42 -04:00
object *v;
if ((v = makepathobject(path, DELIM)) == NULL)
fatal("can't create sys.path");
if (sysset("path", v) != 0)
fatal("can't assign sys.path");
DECREF(v);
}
static object *
makeargvobject(argc, argv)
int argc;
char **argv;
{
object *av;
if (argc <= 0 || argv == NULL) {
/* Ensure at least one (empty) argument is seen */
static char *empty_argv[1] = {""};
argv = empty_argv;
argc = 1;
}
1990-12-20 11:06:42 -04:00
av = newlistobject(argc);
if (av != NULL) {
int i;
1990-12-20 11:06:42 -04:00
for (i = 0; i < argc; i++) {
object *v = newstringobject(argv[i]);
if (v == NULL) {
DECREF(av);
av = NULL;
break;
}
1990-12-20 11:06:42 -04:00
setlistitem(av, i, v);
}
}
1990-12-20 11:06:42 -04:00
return av;
}
void
setpythonargv(argc, argv)
int argc;
char **argv;
{
object *av = makeargvobject(argc, argv);
object *path = sysget("path");
1990-12-20 11:06:42 -04:00
if (av == NULL)
fatal("no mem for sys.argv");
if (sysset("argv", av) != 0)
fatal("can't assign sys.argv");
if (path != NULL) {
char *p = NULL;
int n = 0;
object *a;
#if SEP == '\\' /* Special case for MS filename syntax */
if (argc > 0 && argv[0] != NULL) {
char *q;
p = strrchr(argv[0], SEP);
/* Test for alternate separator */
q = strrchr(p ? p : argv[0], '/');
if (q != NULL)
p = q;
if (p != NULL) {
n = p + 1 - argv[0];
if (n > 1 && p[-1] != ':')
n--; /* Drop trailing separator */
}
}
#else /* All other filename syntaxes */
if (argc > 0 && argv[0] != NULL)
p = strrchr(argv[0], SEP);
if (p != NULL) {
n = p + 1 - argv[0];
#if SEP == '/' /* Special case for Unix filename syntax */
if (n > 1)
n--; /* Drop trailing separator */
#endif /* Unix */
}
#endif /* All others */
a = newsizedstringobject(argv[0], n);
if (a == NULL)
fatal("no mem for sys.path insertion");
if (inslistitem(path, 0, a) < 0)
fatal("sys.path.insert(0) failed");
DECREF(a);
}
1990-12-20 11:06:42 -04:00
DECREF(av);
1990-10-14 09:07:46 -03:00
}