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195 <h1>Class <code>nixio</code></h1>
198 General POSIX IO library.</p>
207 <table class="function_list">
210 <td class="name" nowrap><a href="#nixio.bind">bind</a> (host, port, family, socktype)</td>
212 Create a new socket and bind it to a network address.</td>
216 <td class="name" nowrap><a href="#nixio.chdir">chdir</a> (path)</td>
218 Change the working directory.</td>
222 <td class="name" nowrap><a href="#nixio.closelog">closelog</a> ()</td>
224 (POSIX) Close the connection to the system logger.</td>
228 <td class="name" nowrap><a href="#nixio.connect">connect</a> (host, port, family, socktype)</td>
230 Create a new socket and connect to a network address.</td>
234 <td class="name" nowrap><a href="#nixio.crypt">crypt</a> (key, salt)</td>
236 (POSIX) Encrypt a user password.</td>
240 <td class="name" nowrap><a href="#nixio.dup">dup</a> (oldfd, newfd)</td>
242 Duplicate a file descriptor.</td>
246 <td class="name" nowrap><a href="#nixio.errno">errno</a> ()</td>
248 Get the last system error code.</td>
252 <td class="name" nowrap><a href="#nixio.exec">exec</a> (executable, ...)</td>
254 Execute a file to replace the current process.</td>
258 <td class="name" nowrap><a href="#nixio.exece">exece</a> (executable, arguments, environment)</td>
260 Execute a file with a custom environment to replace the current process.</td>
264 <td class="name" nowrap><a href="#nixio.execp">execp</a> (executable, ...)</td>
266 Invoke the shell and execute a file to replace the current process.</td>
270 <td class="name" nowrap><a href="#nixio.fork">fork</a> ()</td>
272 (POSIX) Clone the current process.</td>
276 <td class="name" nowrap><a href="#nixio.getaddrinfo">getaddrinfo</a> (host, family, service)</td>
278 Look up a hostname and service via DNS.</td>
282 <td class="name" nowrap><a href="#nixio.getcwd">getcwd</a> ()</td>
284 Get the current working directory.</td>
288 <td class="name" nowrap><a href="#nixio.getenv">getenv</a> (variable)</td>
290 Get the current environment table or a specific environment variable.</td>
294 <td class="name" nowrap><a href="#nixio.getgid">getgid</a> ()</td>
296 (POSIX) Get the group id of the current process.</td>
300 <td class="name" nowrap><a href="#nixio.getgr">getgr</a> (group)</td>
302 (POSIX) Get all or a specific user group.</td>
306 <td class="name" nowrap><a href="#nixio.getifaddrs">getifaddrs</a> ()</td>
308 (Linux, BSD) Get a list of available network interfaces and their addresses.</td>
312 <td class="name" nowrap><a href="#nixio.getnameinfo">getnameinfo</a> (ipaddr)</td>
314 Reverse look up an IP-Address via DNS.</td>
318 <td class="name" nowrap><a href="#nixio.getpid">getpid</a> ()</td>
320 Get the ID of the current process.</td>
324 <td class="name" nowrap><a href="#nixio.getppid">getppid</a> ()</td>
326 (POSIX) Get the parent process id of the current process.</td>
330 <td class="name" nowrap><a href="#nixio.getproto">getproto</a> (proto)</td>
332 Get all or a specifc proto entry.</td>
336 <td class="name" nowrap><a href="#nixio.getprotobyname">getprotobyname</a> (name)</td>
338 Get protocol entry by name.</td>
342 <td class="name" nowrap><a href="#nixio.getprotobynumber">getprotobynumber</a> (proto)</td>
344 Get protocol entry by number.</td>
348 <td class="name" nowrap><a href="#nixio.getpw">getpw</a> (user)</td>
350 (POSIX) Get all or a specific user account.</td>
354 <td class="name" nowrap><a href="#nixio.getsp">getsp</a> (user)</td>
356 (Linux, Solaris) Get all or a specific shadow password entry.</td>
360 <td class="name" nowrap><a href="#nixio.getuid">getuid</a> ()</td>
362 (POSIX) Get the user id of the current process.</td>
366 <td class="name" nowrap><a href="#nixio.kill">kill</a> (target, signal)</td>
368 (POSIX) Send a signal to one or more processes.</td>
372 <td class="name" nowrap><a href="#nixio.nanosleep">nanosleep</a> (seconds, nanoseconds)</td>
374 Sleep for a specified amount of time.</td>
378 <td class="name" nowrap><a href="#nixio.nice">nice</a> (nice)</td>
380 (POSIX) Change priority of current process.</td>
384 <td class="name" nowrap><a href="#nixio.open">open</a> (path, flags, mode)</td>
390 <td class="name" nowrap><a href="#nixio.open_flags">open_flags</a> (flag1, ...)</td>
392 Generate flags for a call to open().</td>
396 <td class="name" nowrap><a href="#nixio.openlog">openlog</a> (ident, flag1, ...)</td>
398 (POSIX) Open a connection to the system logger.</td>
402 <td class="name" nowrap><a href="#nixio.pipe">pipe</a> ()</td>
408 <td class="name" nowrap><a href="#nixio.poll">poll</a> (fds, timeout)</td>
410 Wait for some event on a file descriptor.</td>
414 <td class="name" nowrap><a href="#nixio.poll_flags">poll_flags</a> (mode1, ...)</td>
416 Generate events-bitfield or parse revents-bitfield for poll.</td>
420 <td class="name" nowrap><a href="#nixio.sendfile">sendfile</a> (socket, file, length)</td>
422 (POSIX) Send data from a file to a socket in kernel-space.</td>
426 <td class="name" nowrap><a href="#nixio.setenv">setenv</a> (variable, value)</td>
428 Set or unset a environment variable.</td>
432 <td class="name" nowrap><a href="#nixio.setgid">setgid</a> (gid)</td>
434 (POSIX) Set the group id of the current process.</td>
438 <td class="name" nowrap><a href="#nixio.setlogmask">setlogmask</a> (priority)</td>
440 (POSIX) Set the logmask of the system logger for current process.</td>
444 <td class="name" nowrap><a href="#nixio.setsid">setsid</a> ()</td>
446 (POSIX) Create a new session and set the process group ID.</td>
450 <td class="name" nowrap><a href="#nixio.setuid">setuid</a> (gid)</td>
452 (POSIX) Set the user id of the current process.</td>
456 <td class="name" nowrap><a href="#nixio.signal">signal</a> (signal, handler)</td>
458 Ignore or use set the default handler for a signal.</td>
462 <td class="name" nowrap><a href="#nixio.socket">socket</a> (domain, type)</td>
464 Create a new socket.</td>
468 <td class="name" nowrap><a href="#nixio.splice">splice</a> (fdin, fdout, length, flags)</td>
470 (Linux) Send data from / to a pipe in kernel-space.</td>
474 <td class="name" nowrap><a href="#nixio.splice_flags">splice_flags</a> (flag1, ...)</td>
476 (Linux) Generate a flag bitfield for a call to splice.</td>
480 <td class="name" nowrap><a href="#nixio.strerror">strerror</a> (errno)</td>
482 Get the error message for the corresponding error code.</td>
486 <td class="name" nowrap><a href="#nixio.sysinfo">sysinfo</a> ()</td>
488 (Linux) Get overall system statistics.</td>
492 <td class="name" nowrap><a href="#nixio.syslog">syslog</a> (priority)</td>
494 (POSIX) Write a message to the system logger.</td>
498 <td class="name" nowrap><a href="#nixio.times">times</a> ()</td>
500 (POSIX) Get process times.</td>
504 <td class="name" nowrap><a href="#nixio.tls">tls</a> (mode)</td>
506 Create a new TLS context.</td>
510 <td class="name" nowrap><a href="#nixio.umask">umask</a> (mask)</td>
512 Sets the file mode creation mask.</td>
516 <td class="name" nowrap><a href="#nixio.uname">uname</a> ()</td>
518 (POSIX) Get information about current system and kernel.</td>
522 <td class="name" nowrap><a href="#nixio.waitpid">waitpid</a> (pid, flag1, ...)</td>
524 (POSIX) Wait for a process to change state.</td>
538 <h2><a name="functions"></a>Functions</h2>
539 <dl class="function">
543 <dt><a name="nixio.bind"></a><strong>bind</strong> (host, port, family, socktype)</dt>
546 Create a new socket and bind it to a network address.
547 This function is a shortcut for calling nixio.socket and then bind()
548 on the socket object.
555 host: Hostname or IP-Address (optional, default: all addresses)
559 port: Port or service description
563 family: Address family [<strong>"any"</strong>, "inet", "inet6"]
567 socktype: Socket Type [<strong>"stream"</strong>, "dgram"]
578 <li>This functions calls getaddrinfo(), socket(),
579 setsockopt() and bind() but NOT listen().
581 <li>The <em>reuseaddr</em>-option is automatically set before binding.
587 <h3>Return value:</h3>
597 <dt><a name="nixio.chdir"></a><strong>chdir</strong> (path)</dt>
600 Change the working directory.
607 path: New working directory
617 <h3>Return value:</h3>
627 <dt><a name="nixio.closelog"></a><strong>closelog</strong> ()</dt>
630 (POSIX) Close the connection to the system logger.
645 <dt><a name="nixio.connect"></a><strong>connect</strong> (host, port, family, socktype)</dt>
648 Create a new socket and connect to a network address.
649 This function is a shortcut for calling nixio.socket and then connect()
650 on the socket object.
657 host: Hostname or IP-Address (optional, default: localhost)
661 port: Port or service description
665 family: Address family [<strong>"any"</strong>, "inet", "inet6"]
669 socktype: Socket Type [<strong>"stream"</strong>, "dgram"]
678 This functions calls getaddrinfo(), socket() and connect().
682 <h3>Return value:</h3>
692 <dt><a name="nixio.crypt"></a><strong>crypt</strong> (key, salt)</dt>
695 (POSIX) Encrypt a user password.
716 <h3>Return value:</h3>
726 <dt><a name="nixio.dup"></a><strong>dup</strong> (oldfd, newfd)</dt>
729 Duplicate a file descriptor.
736 oldfd: Old descriptor [File Object, Socket Object (POSIX only)]
740 newfd: New descriptor to serve as copy (optional)
749 This funcation calls dup2() if <em>newfd</em> is set, otherwise dup().
753 <h3>Return value:</h3>
754 File Object of new descriptor
763 <dt><a name="nixio.errno"></a><strong>errno</strong> ()</dt>
766 Get the last system error code.
774 <h3>Return value:</h3>
784 <dt><a name="nixio.exec"></a><strong>exec</strong> (executable, ...)</dt>
787 Execute a file to replace the current process.
794 executable: Executable
809 <li>The name of the executable is automatically passed as argv[0]
811 <li>This function does not return on success.
824 <dt><a name="nixio.exece"></a><strong>exece</strong> (executable, arguments, environment)</dt>
827 Execute a file with a custom environment to replace the current process.
834 executable: Executable
838 arguments: Argument Table
842 environment: Environment Table (optional)
853 <li>The name of the executable is automatically passed as argv[0]
855 <li>This function does not return on success.
868 <dt><a name="nixio.execp"></a><strong>execp</strong> (executable, ...)</dt>
871 Invoke the shell and execute a file to replace the current process.
878 executable: Executable
893 <li>The name of the executable is automatically passed as argv[0]
895 <li>This function does not return on success.
908 <dt><a name="nixio.fork"></a><strong>fork</strong> ()</dt>
911 (POSIX) Clone the current process.
919 <h3>Return value:</h3>
920 the child process id for the parent process, 0 for the child process
929 <dt><a name="nixio.getaddrinfo"></a><strong>getaddrinfo</strong> (host, family, service)</dt>
932 Look up a hostname and service via DNS.
939 host: hostname to lookup (optional)
943 family: address family [<strong>"any"</strong>, "inet", "inet6"]
947 service: service name or port (optional)
957 <h3>Return value:</h3>
958 Table containing one or more tables containing: <ul>
959 <li>family = ["inet", "inet6"]</li>
960 <li>socktype = ["stream", "dgram", "raw"]</li>
961 <li>address = Resolved IP-Address</li>
962 <li>port = Resolved Port (if service was given)</li>
972 <dt><a name="nixio.getcwd"></a><strong>getcwd</strong> ()</dt>
975 Get the current working directory.
983 <h3>Return value:</h3>
993 <dt><a name="nixio.getenv"></a><strong>getenv</strong> (variable)</dt>
996 Get the current environment table or a specific environment variable.
1003 variable: Variable (optional)
1013 <h3>Return value:</h3>
1014 environment table or single environment variable
1023 <dt><a name="nixio.getgid"></a><strong>getgid</strong> ()</dt>
1026 (POSIX) Get the group id of the current process.
1034 <h3>Return value:</h3>
1044 <dt><a name="nixio.getgr"></a><strong>getgr</strong> (group)</dt>
1047 (POSIX) Get all or a specific user group.
1054 group: Group ID or groupname (optional)
1064 <h3>Return value:</h3>
1065 Table containing: <ul>
1066 <li>name = Group Name</li>
1067 <li>gid = Group ID</li>
1068 <li>passwd = Password</li>
1069 <li>mem = {Member #1, Member #2, ...}</li>
1079 <dt><a name="nixio.getifaddrs"></a><strong>getifaddrs</strong> ()</dt>
1082 (Linux, BSD) Get a list of available network interfaces and their addresses.
1090 <h3>Return value:</h3>
1091 Table containing one or more tables containing: <ul>
1092 <li>name = Interface Name</li>
1093 <li>family = ["inet", "inet6", "packet"]</li>
1094 <li>addr = Interface Address (IPv4, IPv6, MAC, ...)</li>
1095 <li>broadaddr = Broadcast Address</li>
1096 <li>dstaddr = Destination Address (Point-to-Point)</li>
1097 <li>netmask = Netmask (if available)</li>
1098 <li>prefix = Prefix (if available)</li>
1099 <li>flags = Table of interface flags (up, multicast, loopback, ...)</li>
1100 <li>data = Statistics (Linux, "packet"-family)</li>
1101 <li>hatype = Hardware Type Identifier (Linix, "packet"-family)</li>
1102 <li>ifindex = Interface Index (Linux, "packet"-family)</li>
1112 <dt><a name="nixio.getnameinfo"></a><strong>getnameinfo</strong> (ipaddr)</dt>
1115 Reverse look up an IP-Address via DNS.
1122 ipaddr: IPv4 or IPv6-Address
1132 <h3>Return value:</h3>
1142 <dt><a name="nixio.getpid"></a><strong>getpid</strong> ()</dt>
1145 Get the ID of the current process.
1153 <h3>Return value:</h3>
1163 <dt><a name="nixio.getppid"></a><strong>getppid</strong> ()</dt>
1166 (POSIX) Get the parent process id of the current process.
1174 <h3>Return value:</h3>
1184 <dt><a name="nixio.getproto"></a><strong>getproto</strong> (proto)</dt>
1187 Get all or a specifc proto entry.
1194 proto: protocol number or name to lookup (optional)
1204 <h3>Return value:</h3>
1205 Table (or if no parameter is given, a table of tables)
1206 containing the following fields: <ul>
1207 <li>name = Protocol Name</li>
1208 <li>proto = Protocol Number</li>
1209 <li>aliases = Table of alias names</li>
1219 <dt><a name="nixio.getprotobyname"></a><strong>getprotobyname</strong> (name)</dt>
1222 Get protocol entry by name.
1229 name: protocol name to lookup
1238 This function returns nil if the given protocol is unknown.
1242 <h3>Return value:</h3>
1243 Table containing the following fields: <ul>
1244 <li>name = Protocol Name</li>
1245 <li>proto = Protocol Number</li>
1246 <li>aliases = Table of alias names</li>
1256 <dt><a name="nixio.getprotobynumber"></a><strong>getprotobynumber</strong> (proto)</dt>
1259 Get protocol entry by number.
1266 proto: protocol number to lookup
1275 This function returns nil if the given protocol is unknown.
1279 <h3>Return value:</h3>
1280 Table containing the following fields: <ul>
1281 <li>name = Protocol Name</li>
1282 <li>proto = Protocol Number</li>
1283 <li>aliases = Table of alias names</li>
1293 <dt><a name="nixio.getpw"></a><strong>getpw</strong> (user)</dt>
1296 (POSIX) Get all or a specific user account.
1303 user: User ID or username (optional)
1313 <h3>Return value:</h3>
1314 Table containing: <ul>
1315 <li>name = Name</li>
1317 <li>gid = Group ID</li>
1318 <li>passwd = Password</li>
1319 <li>dir = Home directory</li>
1320 <li>gecos = Information</li>
1321 <li>shell = Shell</li>
1331 <dt><a name="nixio.getsp"></a><strong>getsp</strong> (user)</dt>
1334 (Linux, Solaris) Get all or a specific shadow password entry.
1341 user: username (optional)
1351 <h3>Return value:</h3>
1352 Table containing: <ul>
1353 <li>namp = Name</li>
1354 <li>expire = Expiration Date</li>
1355 <li>flag = Flags</li>
1356 <li>inact = Inactivity Date</li>
1357 <li>lstchg = Last change</li>
1358 <li>max = Maximum</li>
1359 <li>min = Minimum</li>
1360 <li>warn = Warning</li>
1361 <li>pwdp = Password Hash</li>
1371 <dt><a name="nixio.getuid"></a><strong>getuid</strong> ()</dt>
1374 (POSIX) Get the user id of the current process.
1382 <h3>Return value:</h3>
1392 <dt><a name="nixio.kill"></a><strong>kill</strong> (target, signal)</dt>
1395 (POSIX) Send a signal to one or more processes.
1402 target: Target process of process group.
1406 signal: Signal to send
1416 <h3>Return value:</h3>
1426 <dt><a name="nixio.nanosleep"></a><strong>nanosleep</strong> (seconds, nanoseconds)</dt>
1429 Sleep for a specified amount of time.
1436 seconds: Seconds to wait (optional)
1440 nanoseconds: Nanoseconds to wait (optional)
1451 <li>Not all systems support nanosecond precision but you can expect
1452 to have at least maillisecond precision.
1454 <li>This function is not signal-protected and may fail with EINTR.
1460 <h3>Return value:</h3>
1470 <dt><a name="nixio.nice"></a><strong>nice</strong> (nice)</dt>
1473 (POSIX) Change priority of current process.
1490 <h3>Return value:</h3>
1500 <dt><a name="nixio.open"></a><strong>open</strong> (path, flags, mode)</dt>
1510 path: Filesystem path to open
1514 flags: Flag string or number (see open_flags).
1515 [<strong>"r"</strong>, "r+", "w", "w+", "a", "a+"]
1519 mode: File mode for newly created files (see chmod, umask).
1528 Although this function also supports the traditional fopen()
1529 file flags it does not create a file stream but uses the open() syscall.
1533 <h3>Return value:</h3>
1541 <li><a href="#nixio.umask">
1545 <li><a href="#nixio.open_flags">
1556 <dt><a name="nixio.open_flags"></a><strong>open_flags</strong> (flag1, ...)</dt>
1559 Generate flags for a call to open().
1566 flag1: First Flag ["append", "creat", "excl", "nonblock", "ndelay",
1567 "sync", "trunc", "rdonly", "wronly", "rdwr"]
1571 ...: More Flags [-"-]
1582 <li>This function cannot fail and will never return nil.
1584 <li>The "nonblock" and "ndelay" flags are aliases.
1586 <li>The "nonblock", "ndelay" and "sync" flags are no-ops on Windows.
1592 <h3>Return value:</h3>
1593 flag to be used as second parameter to open
1602 <dt><a name="nixio.openlog"></a><strong>openlog</strong> (ident, flag1, ...)</dt>
1605 (POSIX) Open a connection to the system logger.
1616 flag1: Flag 1 ["cons", "nowait", "pid", "perror", "ndelay", "odelay"]
1620 ...: More flags [-"-]
1637 <dt><a name="nixio.pipe"></a><strong>pipe</strong> ()</dt>
1648 <h3>Return values:</h3>
1651 <li>File Object of the read end
1653 <li>File Object of the write end
1664 <dt><a name="nixio.poll"></a><strong>poll</strong> (fds, timeout)</dt>
1667 Wait for some event on a file descriptor.
1668 poll() sets the revents-field of the tables provided by fds to a bitfield
1669 indicating the events that occurred.
1676 fds: Table containing one or more tables containing <ul>
1677 <li> fd = I/O Descriptor [Socket Object, File Object (POSIX)]</li>
1678 <li> events = events to wait for (bitfield generated with poll_flags)</li>
1683 timeout: Timeout in milliseconds
1694 <li>This function works in-place on the provided table and only
1695 writes the revents field, you can use other fields on your demand.
1697 <li>All metamethods on the tables provided as fds are ignored.
1699 <li>The revents-fields are not reset when the call times out.
1700 You have to check the first return value to be 0 to handle this case.
1702 <li>If you want to wait on a TLS-Socket you have to use the underlying
1705 <li>On Windows poll is emulated through select(), can only be used
1706 on socket descriptors and cannot take more than 64 descriptors per call.
1708 <li>This function is not signal-protected and may fail with EINTR.
1714 <h3>Return values:</h3>
1717 <li>number of ready IO descriptors
1719 <li>the fds-table with revents-fields set
1728 <li><a href="#nixio.poll_flags">
1739 <dt><a name="nixio.poll_flags"></a><strong>poll_flags</strong> (mode1, ...)</dt>
1742 Generate events-bitfield or parse revents-bitfield for poll.
1749 mode1: revents-Flag bitfield returned from poll to parse OR
1750 ["in", "out", "err", "pri" (POSIX), "hup" (POSIX), "nval" (POSIX)]
1754 ...: More mode strings for generating the flag [-"-]
1764 <h3>Return value:</h3>
1765 table with boolean fields reflecting the mode parameter
1766 <strong>OR</strong> bitfield to use for the events-Flag field
1773 <li><a href="#nixio.poll">
1784 <dt><a name="nixio.sendfile"></a><strong>sendfile</strong> (socket, file, length)</dt>
1787 (POSIX) Send data from a file to a socket in kernel-space.
1794 socket: Socket Object
1802 length: Amount of data to send (in Bytes).
1812 <h3>Return value:</h3>
1822 <dt><a name="nixio.setenv"></a><strong>setenv</strong> (variable, value)</dt>
1825 Set or unset a environment variable.
1836 value: Value (optional)
1845 The environment variable will be unset if value is omitted.
1849 <h3>Return value:</h3>
1859 <dt><a name="nixio.setgid"></a><strong>setgid</strong> (gid)</dt>
1862 (POSIX) Set the group id of the current process.
1879 <h3>Return value:</h3>
1889 <dt><a name="nixio.setlogmask"></a><strong>setlogmask</strong> (priority)</dt>
1892 (POSIX) Set the logmask of the system logger for current process.
1899 priority: Priority ["emerg", "alert", "crit", "err", "warning",
1900 "notice", "info", "debug"]
1917 <dt><a name="nixio.setsid"></a><strong>setsid</strong> ()</dt>
1920 (POSIX) Create a new session and set the process group ID.
1928 <h3>Return value:</h3>
1938 <dt><a name="nixio.setuid"></a><strong>setuid</strong> (gid)</dt>
1941 (POSIX) Set the user id of the current process.
1958 <h3>Return value:</h3>
1968 <dt><a name="nixio.signal"></a><strong>signal</strong> (signal, handler)</dt>
1971 Ignore or use set the default handler for a signal.
1982 handler: ["ign", "dfl"]
1992 <h3>Return value:</h3>
2002 <dt><a name="nixio.socket"></a><strong>socket</strong> (domain, type)</dt>
2005 Create a new socket.
2012 domain: Domain ["inet", "inet6", "unix"]
2016 type: Type ["stream", "dgram", "raw"]
2026 <h3>Return value:</h3>
2036 <dt><a name="nixio.splice"></a><strong>splice</strong> (fdin, fdout, length, flags)</dt>
2039 (Linux) Send data from / to a pipe in kernel-space.
2046 fdin: Input I/O descriptor
2050 fdout: Output I/O descriptor
2054 length: Amount of data to send (in Bytes).
2058 flags: (optional, bitfield generated by splice_flags)
2068 <h3>Return value:</h3>
2076 <li><a href="#nixio.splice_flags">
2087 <dt><a name="nixio.splice_flags"></a><strong>splice_flags</strong> (flag1, ...)</dt>
2090 (Linux) Generate a flag bitfield for a call to splice.
2097 flag1: First Flag ["move", "nonblock", "more"]
2101 ...: More flags [-"-]
2111 <h3>Return value:</h3>
2119 <li><a href="#nixio.splice">
2130 <dt><a name="nixio.strerror"></a><strong>strerror</strong> (errno)</dt>
2133 Get the error message for the corresponding error code.
2140 errno: System error code
2150 <h3>Return value:</h3>
2160 <dt><a name="nixio.sysinfo"></a><strong>sysinfo</strong> ()</dt>
2163 (Linux) Get overall system statistics.
2171 <h3>Return value:</h3>
2172 Table containing: <ul>
2173 <li>uptime = system uptime in seconds</li>
2174 <li>loads = {loadavg1, loadavg5, loadavg15}</li>
2175 <li>totalram = total RAM</li>
2176 <li>freeram = free RAM</li>
2177 <li>sharedram = shared RAM</li>
2178 <li>bufferram = buffered RAM</li>
2179 <li>totalswap = total SWAP</li>
2180 <li>freeswap = free SWAP</li>
2181 <li>procs = number of running processes</li>
2191 <dt><a name="nixio.syslog"></a><strong>syslog</strong> (priority)</dt>
2194 (POSIX) Write a message to the system logger.
2201 priority: Priority ["emerg", "alert", "crit", "err", "warning",
2202 "notice", "info", "debug"]
2219 <dt><a name="nixio.times"></a><strong>times</strong> ()</dt>
2222 (POSIX) Get process times.
2230 <h3>Return value:</h3>
2231 Table containing: <ul>
2232 <li>utime = user time</li>
2233 <li>utime = system time</li>
2234 <li>cutime = children user time</li>
2235 <li>cstime = children system time</li>
2245 <dt><a name="nixio.tls"></a><strong>tls</strong> (mode)</dt>
2248 Create a new TLS context.
2255 mode: TLS-Mode ["client", "server"]
2265 <h3>Return value:</h3>
2275 <dt><a name="nixio.umask"></a><strong>umask</strong> (mask)</dt>
2278 Sets the file mode creation mask.
2285 mask: New creation mask (see chmod for format specifications)
2295 <h3>Return values:</h3>
2298 <li>the old umask as decimal mode number
2300 <li>the old umask as mode string
2311 <dt><a name="nixio.uname"></a><strong>uname</strong> ()</dt>
2314 (POSIX) Get information about current system and kernel.
2322 <h3>Return value:</h3>
2323 Table containing: <ul>
2324 <li>sysname = operating system</li>
2325 <li>nodename = network name (usually hostname)</li>
2326 <li>release = OS release</li>
2327 <li>version = OS version</li>
2328 <li>machine = hardware identifier</li>
2338 <dt><a name="nixio.waitpid"></a><strong>waitpid</strong> (pid, flag1, ...)</dt>
2341 (POSIX) Wait for a process to change state.
2348 pid: Process ID (optional, default: any childprocess)
2352 flag1: Flag (optional) ["nohang", "untraced", "continued"]
2356 ...: More Flags [-"-]
2365 If the "nohang" is given this function becomes non-blocking.
2369 <h3>Return values:</h3>
2372 <li>process id of child or 0 if no child has changed state
2374 <li>["exited", "signaled", "stopped"]
2376 <li>[exit code, terminate signal, stop signal]
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