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Recognize pyc files even if they don't end in pyc.

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Patch #103067 with modifications as discussed in email.
This commit is contained in:
Martin v. Löwis 2001-01-04 20:30:56 +00:00
parent b31d36cf01
commit be4c0f56a2
2 changed files with 41 additions and 7 deletions
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8
Misc/NEWS
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@ -3,6 +3,14 @@ What's New in Python 2.1 alpha 1?
Core language, builtins, and interpreter
- The interpreter accepts now bytecode files on the command line even
if they do not have a .pyc or .pyo extension. On Linux, after executing
echo ':pyc:M::\x87\xc6\x0d\x0a::/usr/local/bin/python:' > /proc/sys/fs/binfmt_misc/register
any byte code file can be used as an executable (i.e. as an argument
to execve(2)).
- %[xXo] formats of negative Python longs now produce a sign
character. In 1.6 and earlier, they never produced a sign,
and raised an error if the value of the long was too large

40
Python/pythonrun.c
View File

@ -546,6 +546,38 @@ PyRun_SimpleFile(FILE *fp, char *filename)
return PyRun_SimpleFileEx(fp, filename, 0);
}
/* Check whether a file maybe a pyc file: Look at the extension,
the file type, and, if we may close it, at the first few bytes. */
static int
maybe_pyc_file(FILE *fp, char* filename, char* ext, int closeit)
{
if (strcmp(ext, ".pyc") == 0 || strcmp(ext, ".pyo") == 0)
return 1;
#ifdef macintosh
/* On a mac, we also assume a pyc file for types 'PYC ' and 'APPL' */
if (PyMac_getfiletype(filename) == 'PYC '
|| PyMac_getfiletype(filename) == 'APPL')
return 1;
#endif /* macintosh */
/* Only look into the file if we are allowed to close it, since
it then should also be seekable. */
if (closeit) {
/* Read only two bytes of the magic. If the file was opened in
text mode, the bytes 3 and 4 of the magic (\r\n) might not
be read as they are on disk. */
unsigned int halfmagic = PyImport_GetMagicNumber() & 0xFFFF;
unsigned char buf[2];
if (fread(buf, 1, 2, fp) == 2
&& (buf[1]<<8 | buf[0]) == halfmagic)
return 1;
fseek(fp, 0, SEEK_SET);
}
return 0;
}
int
PyRun_SimpleFileEx(FILE *fp, char *filename, int closeit)
{
@ -557,13 +589,7 @@ PyRun_SimpleFileEx(FILE *fp, char *filename, int closeit)
return -1;
d = PyModule_GetDict(m);
ext = filename + strlen(filename) - 4;
if (strcmp(ext, ".pyc") == 0 || strcmp(ext, ".pyo") == 0
#ifdef macintosh
/* On a mac, we also assume a pyc file for types 'PYC ' and 'APPL' */
|| PyMac_getfiletype(filename) == 'PYC '
|| PyMac_getfiletype(filename) == 'APPL'
#endif /* macintosh */
) {
if (maybe_pyc_file(fp, filename, ext, closeit)) {
/* Try to run a pyc file. First, re-open in binary */
if (closeit)
fclose(fp);