stdin closed by become_daemon()

[unix.gurus@…]

In ./django/utils/daemonize.py the posix become_daemon() function contains this code:

si = open('/dev/null', 'r')
so = open(out_log, 'a+', 0)
se = open(err_log, 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
# Set custom file descriptors so that they get proper buffering.
sys.stdout, sys.stderr = so, se

When si passes out of scope the desctructor ends up closing FD 0 (sys.stdin). If anything tries to read stdin it will get the contents of the next open()ed file.

sys.stdin = si should be sufficient to keep it in scope.

[anonymous]

Sorry, this is not an issue unless the dup2 is preceeded by an os.close(sys.stdin.fileno()).