Bugs item #1467952, was opened at 2006-04-10 20:12 Message generated for change (Comment added) made by gbrandl You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1467952&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: Platform-specific >Status: Closed >Resolution: Fixed Priority: 5 Submitted By: Gary Stiehr (gstiehr) Assigned to: Nobody/Anonymous (nobody) Summary: os.listdir on Linux returns empty list on some errors Initial Comment: os.listdir() (defined in the posix_listdir() function on line 1449 of Modules/posixmodule.c in the Python-2.4.3 source distribution) does not check for an error condition when it calls the readdir() system call on line 1665 of posixmodule.c. According to the readdir(3) man page included the Scientific Linux 4.2 (based off of Red Hat Enterprise Linux 4 sources): The readdir() function returns a pointer to a dirent structure, or NULL if an error occurs or end-of-file is reached. It seems that the posix_listdir() function assumes that NULL can only mean end-of-file. Therefore, in the situation where readdir() returns NULL due to some error, such as an I/O Error, posix_listdir() ends the while loop started at line 1665 and goes to the closedir() call at line 1702. This results in an os.listdir() call returning an empty list (as if the directory had no contents) instead of raising an exception. This error was noticed because we performed an ls in a particular directory and it returned with an I/O error. I was then writing a python script to monitor for this condition when I found that the os.listdir() in this directory returned an empty list instead of an I/O error. This behavior was noticed using Python 2.3.4; I looked at the latest (as of 2006-04-07) stable release source (Python 2.4.3) to investigate and to provide the details in this bug report. I also took a quick look at the most recent 2.5.x code and although the posix_listdir function has changed, it still appears as if it would return an empty list if the readdir() call returns NULL. ---------------------------------------------------------------------- >Comment By: Georg Brandl (gbrandl) Date: 2006-04-11 06:51 Message: Logged In: YES user_id=849994 Thank you for the report, fixed in rev. 45259, 45260. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1467952&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
