mirror of https://github.com/python/cpython
171 lines
3.7 KiB
C
171 lines
3.7 KiB
C
/*
|
|
* This wrapper program executes a python executable hidden inside an
|
|
* application bundle inside the Python framework. This is needed to run
|
|
* GUI code: some GUI API's don't work unless the program is inside an
|
|
* application bundle.
|
|
*
|
|
* This program uses posix_spawn rather than plain execv because we need
|
|
* slightly more control over how the "real" interpreter is executed.
|
|
*
|
|
* On OSX 10.4 (and earlier) this falls back to using exec because the
|
|
* posix_spawnv functions aren't available there.
|
|
*/
|
|
#pragma weak_import posix_spawnattr_init
|
|
#pragma weak_import posix_spawnattr_setbinpref_np
|
|
#pragma weak_import posix_spawnattr_setflags
|
|
#pragma weak_import posix_spawn
|
|
|
|
#include <Python.h>
|
|
#include <unistd.h>
|
|
#ifdef HAVE_SPAWN_H
|
|
#include <spawn.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <err.h>
|
|
#include <dlfcn.h>
|
|
#include <stdlib.h>
|
|
|
|
|
|
extern char** environ;
|
|
|
|
/*
|
|
* Locate the python framework by looking for the
|
|
* library that contains Py_Initialize.
|
|
*
|
|
* In a regular framework the structure is:
|
|
*
|
|
* Python.framework/Versions/2.7
|
|
* /Python
|
|
* /Resources/Python.app/Contents/MacOS/Python
|
|
*
|
|
* In a virtualenv style structure the expected
|
|
* structure is:
|
|
*
|
|
* ROOT
|
|
* /bin/pythonw
|
|
* /.Python <- the dylib
|
|
* /.Resources/Python.app/Contents/MacOS/Python
|
|
*
|
|
* NOTE: virtualenv's are not an officially supported
|
|
* feature, support for that structure is provided as
|
|
* a convenience.
|
|
*/
|
|
static char* get_python_path(void)
|
|
{
|
|
size_t len;
|
|
Dl_info info;
|
|
char* end;
|
|
char* g_path;
|
|
|
|
if (dladdr(Py_Initialize, &info) == 0) {
|
|
return NULL;
|
|
}
|
|
|
|
len = strlen(info.dli_fname);
|
|
|
|
g_path = malloc(len+60);
|
|
if (g_path == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
strcpy(g_path, info.dli_fname);
|
|
end = g_path + len - 1;
|
|
while (end != g_path && *end != '/') {
|
|
end --;
|
|
}
|
|
end++;
|
|
if (*end == '.') {
|
|
end++;
|
|
}
|
|
strcpy(end, "Resources/Python.app/Contents/MacOS/" PYTHONFRAMEWORK);
|
|
|
|
return g_path;
|
|
}
|
|
|
|
#ifdef HAVE_SPAWN_H
|
|
static void
|
|
setup_spawnattr(posix_spawnattr_t* spawnattr)
|
|
{
|
|
size_t ocount;
|
|
size_t count;
|
|
cpu_type_t cpu_types[1];
|
|
short flags = 0;
|
|
#ifdef __LP64__
|
|
int ch;
|
|
#endif
|
|
|
|
if ((errno = posix_spawnattr_init(spawnattr)) != 0) {
|
|
err(2, "posix_spawnattr_int");
|
|
/* NOTREACHTED */
|
|
}
|
|
|
|
count = 1;
|
|
|
|
/* Run the real python executable using the same architure as this
|
|
* executable, this allows users to controle the architecture using
|
|
* "arch -ppc python"
|
|
*/
|
|
|
|
#if defined(__ppc64__)
|
|
cpu_types[0] = CPU_TYPE_POWERPC64;
|
|
|
|
#elif defined(__x86_64__)
|
|
cpu_types[0] = CPU_TYPE_X86_64;
|
|
|
|
#elif defined(__ppc__)
|
|
cpu_types[0] = CPU_TYPE_POWERPC;
|
|
#elif defined(__i386__)
|
|
cpu_types[0] = CPU_TYPE_X86;
|
|
#else
|
|
# error "Unknown CPU"
|
|
#endif
|
|
|
|
if (posix_spawnattr_setbinpref_np(spawnattr, count,
|
|
cpu_types, &ocount) == -1) {
|
|
err(1, "posix_spawnattr_setbinpref");
|
|
/* NOTREACHTED */
|
|
}
|
|
if (count != ocount) {
|
|
fprintf(stderr, "posix_spawnattr_setbinpref failed to copy\n");
|
|
exit(1);
|
|
/* NOTREACHTED */
|
|
}
|
|
|
|
|
|
/*
|
|
* Set flag that causes posix_spawn to behave like execv
|
|
*/
|
|
flags |= POSIX_SPAWN_SETEXEC;
|
|
if ((errno = posix_spawnattr_setflags(spawnattr, flags)) != 0) {
|
|
err(1, "posix_spawnattr_setflags");
|
|
/* NOTREACHTED */
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int
|
|
main(int argc, char **argv) {
|
|
char* exec_path = get_python_path();
|
|
|
|
#ifdef HAVE_SPAWN_H
|
|
|
|
/* We're weak-linking to posix-spawnv to ensure that
|
|
* an executable build on 10.5 can work on 10.4.
|
|
*/
|
|
if (posix_spawn != NULL) {
|
|
posix_spawnattr_t spawnattr = NULL;
|
|
|
|
|
|
setup_spawnattr(&spawnattr);
|
|
posix_spawn(NULL, exec_path, NULL,
|
|
&spawnattr, argv, environ);
|
|
err(1, "posix_spawn: %s", exec_path);
|
|
}
|
|
#endif
|
|
execve(exec_path, argv, environ);
|
|
err(1, "execve: %s", argv[0]);
|
|
/* NOTREACHED */
|
|
}
|