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Add a workaround for file.ftell() to raise IOError for ttys.

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ftell(3) on BSD doesn't set errno even for ttys and returns useless
values.
This commit is contained in:
Hye-Shik Chang 2005-12-13 16:44:02 +00:00
parent 50f8169fb6
commit e237d50390
5 changed files with 97 additions and 1 deletions
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7
Objects/fileobject.c
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@ -482,6 +482,13 @@ _portable_fseek(FILE *fp, Py_off_t offset, int whence)
static Py_off_t
_portable_ftell(FILE* fp)
{
#ifdef HAVE_BROKEN_FTELL
/* ftell doesn't fail for tty fds on FreeBSD and some others */
if (isatty(fileno(fp))) {
errno = ESPIPE;
return -1;
}
#endif
#if !defined(HAVE_LARGEFILE_SUPPORT)
return ftell(fp);
#elif defined(HAVE_FTELLO) && SIZEOF_OFF_T >= 8