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Fix SF buf #476953: Bad more for opening file gives bad msg. 

If fopen() fails with EINVAL it means that the mode argument is
invalid.  Return the mode in the error message instead of the
filename.
This commit is contained in:
Jeremy Hylton 2001-11-09 16:17:24 +00:00
parent 20747fa167
commit 41c8321252
2 changed files with 17 additions and 2 deletions
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11
Lib/test/test_file.py
View File

@ -46,4 +46,15 @@ else:
print "writelines accepted sequence of non-string objects"
f.close()
# verify that we get a sensible error message for bad made argument
bad_mode = "qwerty"
try:
open(TESTFN, bad_mode)
except IOError, msg:
s = str(msg)
if s.find(TESTFN) != -1 or s.find(bad_mode) == -1:
print "bad error message for invalid mode: %s" % s
else:
print "no error for invalid mode: %s" % bad_mode
os.unlink(TESTFN)

6
Objects/fileobject.c
View File

@ -121,12 +121,16 @@ open_the_file(PyFileObject *f, char *name, char *mode)
if (f->f_fp == NULL) {
#ifdef NO_FOPEN_ERRNO
/* Metroworks only, not testable, so unchanged */
if ( errno == 0 ) {
if (errno == 0) {
PyErr_SetString(PyExc_IOError, "Cannot open file");
Py_DECREF(f);
return NULL;
}
#endif
if (errno == EINVAL)
PyErr_Format(PyExc_IOError, "invalid argument: %s",
mode);
else
PyErr_SetFromErrnoWithFilename(PyExc_IOError, name);
f = NULL;
}