8. Unix Specific Services

The modules described in this chapter provide interfaces to features that are unique to the Unix operating system, or in some cases to some or many variants of it. Here's an overview:

posix	The most common POSIX system calls (normally used via module os).
posixpath	Common POSIX pathname manipulations.
pwd	The password database (getpwnam() and friends).
grp	The group database (getgrnam() and friends).
crypt	The crypt() function used to check Unix passwords.
dbm	The standard ``database'' interface, based on ndbm.
gdbm	GNU's reinterpretation of dbm.
termios	POSIX style tty control.
TERMIOS	Symbolic constants required to use the termios module.
fcntl	The fcntl() and ioctl() system calls.
posixfile	A file-like object with support for locking.
resource	An interface to provide resource usage information on the current process.
syslog	An interface to the Unix syslog library routines.
stat	Utilities for interpreting the results of os.stat(), os.lstat() and os.fstat().
popen2	Subprocesses with accessible standard I/O streams.
commands	Wrapper functions for os.popen().