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 callspwd— The password databasegrp— The group databasetermios— POSIX style tty controltty— Terminal control functionspty— Pseudo-terminal utilitiesfcntl— Thefcntlandioctlsystem callsresource— Resource usage informationerror- Resource Limits
RLIM_INFINITYgetrlimit()setrlimit()prlimit()RLIMIT_CORERLIMIT_CPURLIMIT_FSIZERLIMIT_DATARLIMIT_STACKRLIMIT_RSSRLIMIT_NPROCRLIMIT_NOFILERLIMIT_OFILERLIMIT_MEMLOCKRLIMIT_VMEMRLIMIT_ASRLIMIT_MSGQUEUERLIMIT_NICERLIMIT_RTPRIORLIMIT_RTTIMERLIMIT_SIGPENDINGRLIMIT_SBSIZERLIMIT_SWAPRLIMIT_NPTSRLIMIT_KQUEUES
- Resource Usage
syslog— Unix syslog library routinessyslog()openlog()closelog()setlogmask()LOG_EMERGLOG_ALERTLOG_CRITLOG_ERRLOG_WARNINGLOG_NOTICELOG_INFOLOG_DEBUGLOG_AUTHLOG_AUTHPRIVLOG_CRONLOG_DAEMONLOG_FTPLOG_INSTALLLOG_KERNLOG_LAUNCHDLOG_LPRLOG_MAILLOG_NETINFOLOG_NEWSLOG_RASLOG_REMOTEAUTHLOG_SYSLOGLOG_USERLOG_UUCPLOG_LOCAL0LOG_LOCAL1LOG_LOCAL2LOG_LOCAL3LOG_LOCAL4LOG_LOCAL5LOG_LOCAL6LOG_LOCAL7LOG_PIDLOG_CONSLOG_NDELAYLOG_ODELAYLOG_NOWAITLOG_PERROR- Examples