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38 POSIX System Calls and Networking

• Conventions: Conventions employed by the POSIX interface.
• Ports and File Descriptors: Scheme ``ports'' and Unix file descriptors have different representations.
• File System: stat, chown, chmod, etc.
• User Information: Retrieving a user's GECOS (/etc/passwd) entry.
• Time: gettimeofday, localtime, strftime, etc.
• Runtime Environment: Accessing and modifying Guile's environment.
• Processes: getuid, getpid, etc.
• Signals: sigaction, kill, pause, alarm, setitimer, etc.
• Terminals and Ptys: ttyname, tcsetpgrp, etc.
• Pipes: Communicating data between processes.
• Networking: gethostbyaddr, getnetent, socket, bind, listen.
• System Identification: Obtaining information about the system.
• Locales: setlocale, etc.
• Encryption: