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 198
 199 <h1>Class <code>nixio</code></h1>
 200
 201 <p>
 202  General POSIX IO library.</p>
 203
 204
 205
 206
 207
 208
 209
 210 <h2>Functions</h2>
 211 <table class="function_list">
 212
 213         <tr>
 214         <td class="name" nowrap><a href="#nixio.bind">bind</a>&nbsp;(host, port, family, socktype)</td>
 215         <td class="summary">
 216  Create a new socket and bind it to a network address.</td>
 217         </tr>
 218
 219         <tr>
 220         <td class="name" nowrap><a href="#nixio.chdir">chdir</a>&nbsp;(path)</td>
 221         <td class="summary">
 222  Change the working directory.</td>
 223         </tr>
 224
 225         <tr>
 226         <td class="name" nowrap><a href="#nixio.closelog">closelog</a>&nbsp;()</td>
 227         <td class="summary">
 228  (POSIX) Close the connection to the system logger.</td>
 229         </tr>
 230
 231         <tr>
 232         <td class="name" nowrap><a href="#nixio.connect">connect</a>&nbsp;(host, port, family, socktype)</td>
 233         <td class="summary">
 234  Create a new socket and connect to a network address.</td>
 235         </tr>
 236
 237         <tr>
 238         <td class="name" nowrap><a href="#nixio.crypt">crypt</a>&nbsp;(key, salt)</td>
 239         <td class="summary">
 240  (POSIX) Encrypt a user password.</td>
 241         </tr>
 242
 243         <tr>
 244         <td class="name" nowrap><a href="#nixio.dup">dup</a>&nbsp;(oldfd, newfd)</td>
 245         <td class="summary">
 246  Duplicate a file descriptor.</td>
 247         </tr>
 248
 249         <tr>
 250         <td class="name" nowrap><a href="#nixio.errno">errno</a>&nbsp;()</td>
 251         <td class="summary">
 252  Get the last system error code.</td>
 253         </tr>
 254
 255         <tr>
 256         <td class="name" nowrap><a href="#nixio.exec">exec</a>&nbsp;(executable, ...)</td>
 257         <td class="summary">
 258  Execute a file to replace the current process.</td>
 259         </tr>
 260
 261         <tr>
 262         <td class="name" nowrap><a href="#nixio.exece">exece</a>&nbsp;(executable, arguments, environment)</td>
 263         <td class="summary">
 264  Execute a file with a custom environment to replace the current process.</td>
 265         </tr>
 266
 267         <tr>
 268         <td class="name" nowrap><a href="#nixio.execp">execp</a>&nbsp;(executable, ...)</td>
 269         <td class="summary">
 270  Invoke the shell and execute a file to replace the current process.</td>
 271         </tr>
 272
 273         <tr>
 274         <td class="name" nowrap><a href="#nixio.fork">fork</a>&nbsp;()</td>
 275         <td class="summary">
 276  (POSIX) Clone the current process.</td>
 277         </tr>
 278
 279         <tr>
 280         <td class="name" nowrap><a href="#nixio.getaddrinfo">getaddrinfo</a>&nbsp;(host, family, service)</td>
 281         <td class="summary">
 282  Look up a hostname and service via DNS.</td>
 283         </tr>
 284
 285         <tr>
 286         <td class="name" nowrap><a href="#nixio.getcwd">getcwd</a>&nbsp;()</td>
 287         <td class="summary">
 288  Get the current working directory.</td>
 289         </tr>
 290
 291         <tr>
 292         <td class="name" nowrap><a href="#nixio.getenv">getenv</a>&nbsp;(variable)</td>
 293         <td class="summary">
 294  Get the current environment table or a specific environment variable.</td>
 295         </tr>
 296
 297         <tr>
 298         <td class="name" nowrap><a href="#nixio.getgid">getgid</a>&nbsp;()</td>
 299         <td class="summary">
 300  (POSIX) Get the group id of the current process.</td>
 301         </tr>
 302
 303         <tr>
 304         <td class="name" nowrap><a href="#nixio.getgr">getgr</a>&nbsp;(group)</td>
 305         <td class="summary">
 306  (POSIX) Get all or a specific user group.</td>
 307         </tr>
 308
 309         <tr>
 310         <td class="name" nowrap><a href="#nixio.getifaddrs">getifaddrs</a>&nbsp;()</td>
 311         <td class="summary">
 312  (Linux, BSD) Get a list of available network interfaces and their addresses.</td>
 313         </tr>
 314
 315         <tr>
 316         <td class="name" nowrap><a href="#nixio.getnameinfo">getnameinfo</a>&nbsp;(ipaddr)</td>
 317         <td class="summary">
 318  Reverse look up an IP-Address via DNS.</td>
 319         </tr>
 320
 321         <tr>
 322         <td class="name" nowrap><a href="#nixio.getpid">getpid</a>&nbsp;()</td>
 323         <td class="summary">
 324  Get the ID of the current process.</td>
 325         </tr>
 326
 327         <tr>
 328         <td class="name" nowrap><a href="#nixio.getppid">getppid</a>&nbsp;()</td>
 329         <td class="summary">
 330  (POSIX) Get the parent process id of the current process.</td>
 331         </tr>
 332
 333         <tr>
 334         <td class="name" nowrap><a href="#nixio.getproto">getproto</a>&nbsp;(proto)</td>
 335         <td class="summary">
 336  Get all or a specific proto entry.</td>
 337         </tr>
 338
 339         <tr>
 340         <td class="name" nowrap><a href="#nixio.getprotobyname">getprotobyname</a>&nbsp;(name)</td>
 341         <td class="summary">
 342  Get protocol entry by name.</td>
 343         </tr>
 344
 345         <tr>
 346         <td class="name" nowrap><a href="#nixio.getprotobynumber">getprotobynumber</a>&nbsp;(proto)</td>
 347         <td class="summary">
 348  Get protocol entry by number.</td>
 349         </tr>
 350
 351         <tr>
 352         <td class="name" nowrap><a href="#nixio.getpw">getpw</a>&nbsp;(user)</td>
 353         <td class="summary">
 354  (POSIX) Get all or a specific user account.</td>
 355         </tr>
 356
 357         <tr>
 358         <td class="name" nowrap><a href="#nixio.getsp">getsp</a>&nbsp;(user)</td>
 359         <td class="summary">
 360  (Linux, Solaris) Get all or a specific shadow password entry.</td>
 361         </tr>
 362
 363         <tr>
 364         <td class="name" nowrap><a href="#nixio.getuid">getuid</a>&nbsp;()</td>
 365         <td class="summary">
 366  (POSIX) Get the user id of the current process.</td>
 367         </tr>
 368
 369         <tr>
 370         <td class="name" nowrap><a href="#nixio.kill">kill</a>&nbsp;(target, signal)</td>
 371         <td class="summary">
 372  (POSIX) Send a signal to one or more processes.</td>
 373         </tr>
 374
 375         <tr>
 376         <td class="name" nowrap><a href="#nixio.nanosleep">nanosleep</a>&nbsp;(seconds, nanoseconds)</td>
 377         <td class="summary">
 378  Sleep for a specified amount of time.</td>
 379         </tr>
 380
 381         <tr>
 382         <td class="name" nowrap><a href="#nixio.nice">nice</a>&nbsp;(nice)</td>
 383         <td class="summary">
 384  (POSIX) Change priority of current process.</td>
 385         </tr>
 386
 387         <tr>
 388         <td class="name" nowrap><a href="#nixio.open">open</a>&nbsp;(path, flags, mode)</td>
 389         <td class="summary">
 390  Open a file.</td>
 391         </tr>
 392
 393         <tr>
 394         <td class="name" nowrap><a href="#nixio.open_flags">open_flags</a>&nbsp;(flag1, ...)</td>
 395         <td class="summary">
 396  Generate flags for a call to open().</td>
 397         </tr>
 398
 399         <tr>
 400         <td class="name" nowrap><a href="#nixio.openlog">openlog</a>&nbsp;(ident, flag1, ...)</td>
 401         <td class="summary">
 402  (POSIX) Open a connection to the system logger.</td>
 403         </tr>
 404
 405         <tr>
 406         <td class="name" nowrap><a href="#nixio.pipe">pipe</a>&nbsp;()</td>
 407         <td class="summary">
 408  Create a pipe.</td>
 409         </tr>
 410
 411         <tr>
 412         <td class="name" nowrap><a href="#nixio.poll">poll</a>&nbsp;(fds, timeout)</td>
 413         <td class="summary">
 414  Wait for some event on a file descriptor.</td>
 415         </tr>
 416
 417         <tr>
 418         <td class="name" nowrap><a href="#nixio.poll_flags">poll_flags</a>&nbsp;(mode1, ...)</td>
 419         <td class="summary">
 420  Generate events-bitfield or parse revents-bitfield for poll.</td>
 421         </tr>
 422
 423         <tr>
 424         <td class="name" nowrap><a href="#nixio.sendfile">sendfile</a>&nbsp;(socket, file, length)</td>
 425         <td class="summary">
 426  (POSIX) Send data from a file to a socket in kernel-space.</td>
 427         </tr>
 428
 429         <tr>
 430         <td class="name" nowrap><a href="#nixio.setenv">setenv</a>&nbsp;(variable, value)</td>
 431         <td class="summary">
 432  Set or unset a environment variable.</td>
 433         </tr>
 434
 435         <tr>
 436         <td class="name" nowrap><a href="#nixio.setgid">setgid</a>&nbsp;(gid)</td>
 437         <td class="summary">
 438  (POSIX) Set the group id of the current process.</td>
 439         </tr>
 440
 441         <tr>
 442         <td class="name" nowrap><a href="#nixio.setlogmask">setlogmask</a>&nbsp;(priority)</td>
 443         <td class="summary">
 444  (POSIX) Set the logmask of the system logger for current process.</td>
 445         </tr>
 446
 447         <tr>
 448         <td class="name" nowrap><a href="#nixio.setsid">setsid</a>&nbsp;()</td>
 449         <td class="summary">
 450  (POSIX) Create a new session and set the process group ID.</td>
 451         </tr>
 452
 453         <tr>
 454         <td class="name" nowrap><a href="#nixio.setuid">setuid</a>&nbsp;(gid)</td>
 455         <td class="summary">
 456  (POSIX) Set the user id of the current process.</td>
 457         </tr>
 458
 459         <tr>
 460         <td class="name" nowrap><a href="#nixio.signal">signal</a>&nbsp;(signal, handler)</td>
 461         <td class="summary">
 462  Ignore or use set the default handler for a signal.</td>
 463         </tr>
 464
 465         <tr>
 466         <td class="name" nowrap><a href="#nixio.socket">socket</a>&nbsp;(domain, type)</td>
 467         <td class="summary">
 468  Create a new socket.</td>
 469         </tr>
 470
 471         <tr>
 472         <td class="name" nowrap><a href="#nixio.splice">splice</a>&nbsp;(fdin, fdout, length, flags)</td>
 473         <td class="summary">
 474  (Linux) Send data from / to a pipe in kernel-space.</td>
 475         </tr>
 476
 477         <tr>
 478         <td class="name" nowrap><a href="#nixio.splice_flags">splice_flags</a>&nbsp;(flag1, ...)</td>
 479         <td class="summary">
 480  (Linux) Generate a flag bitfield for a call to splice.</td>
 481         </tr>
 482
 483         <tr>
 484         <td class="name" nowrap><a href="#nixio.strerror">strerror</a>&nbsp;(errno)</td>
 485         <td class="summary">
 486  Get the error message for the corresponding error code.</td>
 487         </tr>
 488
 489         <tr>
 490         <td class="name" nowrap><a href="#nixio.sysinfo">sysinfo</a>&nbsp;()</td>
 491         <td class="summary">
 492  (Linux) Get overall system statistics.</td>
 493         </tr>
 494
 495         <tr>
 496         <td class="name" nowrap><a href="#nixio.syslog">syslog</a>&nbsp;(priority)</td>
 497         <td class="summary">
 498  (POSIX) Write a message to the system logger.</td>
 499         </tr>
 500
 501         <tr>
 502         <td class="name" nowrap><a href="#nixio.times">times</a>&nbsp;()</td>
 503         <td class="summary">
 504  (POSIX) Get process times.</td>
 505         </tr>
 506
 507         <tr>
 508         <td class="name" nowrap><a href="#nixio.tls">tls</a>&nbsp;(mode)</td>
 509         <td class="summary">
 510  Create a new TLS context.</td>
 511         </tr>
 512
 513         <tr>
 514         <td class="name" nowrap><a href="#nixio.umask">umask</a>&nbsp;(mask)</td>
 515         <td class="summary">
 516  Sets the file mode creation mask.</td>
 517         </tr>
 518
 519         <tr>
 520         <td class="name" nowrap><a href="#nixio.uname">uname</a>&nbsp;()</td>
 521         <td class="summary">
 522  (POSIX) Get information about current system and kernel.</td>
 523         </tr>
 524
 525         <tr>
 526         <td class="name" nowrap><a href="#nixio.waitpid">waitpid</a>&nbsp;(pid, flag1, ...)</td>
 527         <td class="summary">
 528  (POSIX) Wait for a process to change state.</td>
 529         </tr>
 530
 531 </table>
 532
 533
 534
 535
 536
 537
 538 <br/>
 539 <br/>
 540
 541
 542 <h2><a name="functions"></a>Functions</h2>
 543 <dl class="function">
 544
 545
 546
 547 <dt><a name="nixio.bind"></a><strong>bind</strong>&nbsp;(host, port, family, socktype)</dt>
 548 <dd>
 549
 550  Create a new socket and bind it to a network address.
 551  This function is a shortcut for calling nixio.socket and then bind()
 552  on the socket object.
 553
 554
 555 <h3>Parameters</h3>
 556 <ul>
 557
 558         <li>
 559           host: Hostname or IP-Address (optional, default: all addresses)
 560         </li>
 561
 562         <li>
 563           port: Port or service description
 564         </li>
 565
 566         <li>
 567           family: Address family [<strong>"any"</strong>, "inet", "inet6"]
 568         </li>
 569
 570         <li>
 571           socktype: Socket Type [<strong>"stream"</strong>, "dgram"]
 572         </li>
 573
 574 </ul>
 575
 576
 577
 578
 579 <h3>Usage</h3>
 580 <ul>
 581
 582         <li>This functions calls getaddrinfo(), socket(),
 583  setsockopt() and bind() but NOT listen().
 584
 585         <li>The <em>reuseaddr</em>-option is automatically set before binding.
 586
 587 </ul>
 588
 589
 590
 591 <h3>Return value:</h3>
 592 Socket Object
 593
 594
 595
 596 </dd>
 597
 598
 599
 600
 601 <dt><a name="nixio.chdir"></a><strong>chdir</strong>&nbsp;(path)</dt>
 602 <dd>
 603
 604  Change the working directory.
 605
 606
 607 <h3>Parameters</h3>
 608 <ul>
 609
 610         <li>
 611           path: New working directory
 612         </li>
 613
 614 </ul>
 615
 616
 617
 618
 619
 620
 621 <h3>Return value:</h3>
 622 true
 623
 624
 625
 626 </dd>
 627
 628
 629
 630
 631 <dt><a name="nixio.closelog"></a><strong>closelog</strong>&nbsp;()</dt>
 632 <dd>
 633
 634  (POSIX) Close the connection to the system logger.
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644 </dd>
 645
 646
 647
 648
 649 <dt><a name="nixio.connect"></a><strong>connect</strong>&nbsp;(host, port, family, socktype)</dt>
 650 <dd>
 651
 652  Create a new socket and connect to a network address.
 653  This function is a shortcut for calling nixio.socket and then connect()
 654  on the socket object.
 655
 656
 657 <h3>Parameters</h3>
 658 <ul>
 659
 660         <li>
 661           host: Hostname or IP-Address (optional, default: localhost)
 662         </li>
 663
 664         <li>
 665           port: Port or service description
 666         </li>
 667
 668         <li>
 669           family: Address family [<strong>"any"</strong>, "inet", "inet6"]
 670         </li>
 671
 672         <li>
 673           socktype: Socket Type [<strong>"stream"</strong>, "dgram"]
 674         </li>
 675
 676 </ul>
 677
 678
 679
 680
 681 <h3>Usage:</h3>
 682 This functions calls getaddrinfo(), socket() and connect().
 683
 684
 685
 686 <h3>Return value:</h3>
 687 Socket Object
 688
 689
 690
 691 </dd>
 692
 693
 694
 695
 696 <dt><a name="nixio.crypt"></a><strong>crypt</strong>&nbsp;(key, salt)</dt>
 697 <dd>
 698
 699  (POSIX) Encrypt a user password.
 700
 701
 702 <h3>Parameters</h3>
 703 <ul>
 704
 705         <li>
 706           key: Key
 707         </li>
 708
 709         <li>
 710           salt: Salt
 711         </li>
 712
 713 </ul>
 714
 715
 716
 717
 718
 719
 720 <h3>Return value:</h3>
 721 password hash
 722
 723
 724
 725 </dd>
 726
 727
 728
 729
 730 <dt><a name="nixio.dup"></a><strong>dup</strong>&nbsp;(oldfd, newfd)</dt>
 731 <dd>
 732
 733  Duplicate a file descriptor.
 734
 735
 736 <h3>Parameters</h3>
 737 <ul>
 738
 739         <li>
 740           oldfd: Old descriptor [File Object, Socket Object (POSIX only)]
 741         </li>
 742
 743         <li>
 744           newfd: New descriptor to serve as copy (optional)
 745         </li>
 746
 747 </ul>
 748
 749
 750
 751
 752 <h3>Usage:</h3>
 753 This funcation calls dup2() if <em>newfd</em> is set, otherwise dup().
 754
 755
 756
 757 <h3>Return value:</h3>
 758 File Object of new descriptor
 759
 760
 761
 762 </dd>
 763
 764
 765
 766
 767 <dt><a name="nixio.errno"></a><strong>errno</strong>&nbsp;()</dt>
 768 <dd>
 769
 770  Get the last system error code.
 771
 772
 773
 774
 775
 776
 777
 778 <h3>Return value:</h3>
 779 Error code
 780
 781
 782
 783 </dd>
 784
 785
 786
 787
 788 <dt><a name="nixio.exec"></a><strong>exec</strong>&nbsp;(executable, ...)</dt>
 789 <dd>
 790
 791  Execute a file to replace the current process.
 792
 793
 794 <h3>Parameters</h3>
 795 <ul>
 796
 797         <li>
 798           executable: Executable
 799         </li>
 800
 801         <li>
 802           ...: Parameters
 803         </li>
 804
 805 </ul>
 806
 807
 808
 809
 810 <h3>Usage</h3>
 811 <ul>
 812
 813         <li>The name of the executable is automatically passed as argv[0]
 814
 815         <li>This function does not return on success.
 816
 817 </ul>
 818
 819
 820
 821
 822
 823 </dd>
 824
 825
 826
 827
 828 <dt><a name="nixio.exece"></a><strong>exece</strong>&nbsp;(executable, arguments, environment)</dt>
 829 <dd>
 830
 831  Execute a file with a custom environment to replace the current process.
 832
 833
 834 <h3>Parameters</h3>
 835 <ul>
 836
 837         <li>
 838           executable: Executable
 839         </li>
 840
 841         <li>
 842           arguments: Argument Table
 843         </li>
 844
 845         <li>
 846           environment: Environment Table (optional)
 847         </li>
 848
 849 </ul>
 850
 851
 852
 853
 854 <h3>Usage</h3>
 855 <ul>
 856
 857         <li>The name of the executable is automatically passed as argv[0]
 858
 859         <li>This function does not return on success.
 860
 861 </ul>
 862
 863
 864
 865
 866
 867 </dd>
 868
 869
 870
 871
 872 <dt><a name="nixio.execp"></a><strong>execp</strong>&nbsp;(executable, ...)</dt>
 873 <dd>
 874
 875  Invoke the shell and execute a file to replace the current process.
 876
 877
 878 <h3>Parameters</h3>
 879 <ul>
 880
 881         <li>
 882           executable: Executable
 883         </li>
 884
 885         <li>
 886           ...: Parameters
 887         </li>
 888
 889 </ul>
 890
 891
 892
 893
 894 <h3>Usage</h3>
 895 <ul>
 896
 897         <li>The name of the executable is automatically passed as argv[0]
 898
 899         <li>This function does not return on success.
 900
 901 </ul>
 902
 903
 904
 905
 906
 907 </dd>
 908
 909
 910
 911
 912 <dt><a name="nixio.fork"></a><strong>fork</strong>&nbsp;()</dt>
 913 <dd>
 914
 915  (POSIX) Clone the current process.
 916
 917
 918
 919
 920
 921
 922
 923 <h3>Return value:</h3>
 924 the child process id for the parent process, 0 for the child process
 925
 926
 927
 928 </dd>
 929
 930
 931
 932
 933 <dt><a name="nixio.getaddrinfo"></a><strong>getaddrinfo</strong>&nbsp;(host, family, service)</dt>
 934 <dd>
 935
 936  Look up a hostname and service via DNS.
 937
 938
 939 <h3>Parameters</h3>
 940 <ul>
 941
 942         <li>
 943           host: hostname to lookup      (optional)
 944         </li>
 945
 946         <li>
 947           family: address family [<strong>"any"</strong>, "inet", "inet6"]
 948         </li>
 949
 950         <li>
 951           service: service name or port (optional)
 952         </li>
 953
 954 </ul>
 955
 956
 957
 958
 959
 960
 961 <h3>Return value:</h3>
 962 Table containing one or more tables containing: <ul>
 963  <li>family = ["inet", "inet6"]</li>
 964  <li>socktype = ["stream", "dgram", "raw"]</li>
 965  <li>address = Resolved IP-Address</li>
 966  <li>port = Resolved Port (if service was given)</li>
 967  </ul>
 968
 969
 970
 971 </dd>
 972
 973
 974
 975
 976 <dt><a name="nixio.getcwd"></a><strong>getcwd</strong>&nbsp;()</dt>
 977 <dd>
 978
 979  Get the current working directory.
 980
 981
 982
 983
 984
 985
 986
 987 <h3>Return value:</h3>
 988 workign directory
 989
 990
 991
 992 </dd>
 993
 994
 995
 996
 997 <dt><a name="nixio.getenv"></a><strong>getenv</strong>&nbsp;(variable)</dt>
 998 <dd>
 999
1000  Get the current environment table or a specific environment variable.
1001
1002
1003 <h3>Parameters</h3>
1004 <ul>
1005
1006         <li>
1007           variable: Variable (optional)
1008         </li>
1009
1010 </ul>
1011
1012
1013
1014
1015
1016
1017 <h3>Return value:</h3>
1018 environment table or single environment variable
1019
1020
1021
1022 </dd>
1023
1024
1025
1026
1027 <dt><a name="nixio.getgid"></a><strong>getgid</strong>&nbsp;()</dt>
1028 <dd>
1029
1030  (POSIX) Get the group id of the current process.
1031
1032
1033
1034
1035
1036
1037
1038 <h3>Return value:</h3>
1039 process group id
1040
1041
1042
1043 </dd>
1044
1045
1046
1047
1048 <dt><a name="nixio.getgr"></a><strong>getgr</strong>&nbsp;(group)</dt>
1049 <dd>
1050
1051  (POSIX) Get all or a specific user group.
1052
1053
1054 <h3>Parameters</h3>
1055 <ul>
1056
1057         <li>
1058           group: Group ID or groupname (optional)
1059         </li>
1060
1061 </ul>
1062
1063
1064
1065
1066
1067
1068 <h3>Return value:</h3>
1069 Table containing: <ul>
1070  <li>name = Group Name</li>
1071  <li>gid = Group ID</li>
1072  <li>passwd = Password</li>
1073  <li>mem = {Member #1, Member #2, ...}</li>
1074  </ul>
1075
1076
1077
1078 </dd>
1079
1080
1081
1082
1083 <dt><a name="nixio.getifaddrs"></a><strong>getifaddrs</strong>&nbsp;()</dt>
1084 <dd>
1085
1086  (Linux, BSD) Get a list of available network interfaces and their addresses.
1087
1088
1089
1090
1091
1092
1093
1094 <h3>Return value:</h3>
1095 Table containing one or more tables containing: <ul>
1096  <li>name = Interface Name</li>
1097  <li>family = ["inet", "inet6", "packet"]</li>
1098  <li>addr = Interface Address (IPv4, IPv6, MAC, ...)</li>
1099  <li>broadaddr = Broadcast Address</li>
1100  <li>dstaddr = Destination Address (Point-to-Point)</li>
1101  <li>netmask = Netmask (if available)</li>
1102  <li>prefix = Prefix (if available)</li>
1103  <li>flags = Table of interface flags (up, multicast, loopback, ...)</li>
1104  <li>data = Statistics (Linux, "packet"-family)</li>
1105  <li>hatype = Hardware Type Identifier (Linix, "packet"-family)</li>
1106  <li>ifindex = Interface Index (Linux, "packet"-family)</li>
1107  </ul>
1108
1109
1110
1111 </dd>
1112
1113
1114
1115
1116 <dt><a name="nixio.getnameinfo"></a><strong>getnameinfo</strong>&nbsp;(ipaddr)</dt>
1117 <dd>
1118
1119  Reverse look up an IP-Address via DNS.
1120
1121
1122 <h3>Parameters</h3>
1123 <ul>
1124
1125         <li>
1126           ipaddr: IPv4 or IPv6-Address
1127         </li>
1128
1129 </ul>
1130
1131
1132
1133
1134
1135
1136 <h3>Return value:</h3>
1137 FQDN
1138
1139
1140
1141 </dd>
1142
1143
1144
1145
1146 <dt><a name="nixio.getpid"></a><strong>getpid</strong>&nbsp;()</dt>
1147 <dd>
1148
1149  Get the ID of the current process.
1150
1151
1152
1153
1154
1155
1156
1157 <h3>Return value:</h3>
1158 process id
1159
1160
1161
1162 </dd>
1163
1164
1165
1166
1167 <dt><a name="nixio.getppid"></a><strong>getppid</strong>&nbsp;()</dt>
1168 <dd>
1169
1170  (POSIX) Get the parent process id of the current process.
1171
1172
1173
1174
1175
1176
1177
1178 <h3>Return value:</h3>
1179 parent process id
1180
1181
1182
1183 </dd>
1184
1185
1186
1187
1188 <dt><a name="nixio.getproto"></a><strong>getproto</strong>&nbsp;(proto)</dt>
1189 <dd>
1190
1191  Get all or a specific proto entry.
1192
1193
1194 <h3>Parameters</h3>
1195 <ul>
1196
1197         <li>
1198           proto: protocol number or name to lookup (optional)
1199         </li>
1200
1201 </ul>
1202
1203
1204
1205
1206
1207
1208 <h3>Return value:</h3>
1209 Table (or if no parameter is given, a table of tables)
1210                   containing the following fields: <ul>
1211  <li>name = Protocol Name</li>
1212  <li>proto = Protocol Number</li>
1213  <li>aliases = Table of alias names</li>
1214  </ul>
1215
1216
1217
1218 </dd>
1219
1220
1221
1222
1223 <dt><a name="nixio.getprotobyname"></a><strong>getprotobyname</strong>&nbsp;(name)</dt>
1224 <dd>
1225
1226  Get protocol entry by name.
1227
1228
1229 <h3>Parameters</h3>
1230 <ul>
1231
1232         <li>
1233           name: protocol name to lookup
1234         </li>
1235
1236 </ul>
1237
1238
1239
1240
1241 <h3>Usage:</h3>
1242 This function returns nil if the given protocol is unknown.
1243
1244
1245
1246 <h3>Return value:</h3>
1247 Table containing the following fields: <ul>
1248  <li>name = Protocol Name</li>
1249  <li>proto = Protocol Number</li>
1250  <li>aliases = Table of alias names</li>
1251  </ul>
1252
1253
1254
1255 </dd>
1256
1257
1258
1259
1260 <dt><a name="nixio.getprotobynumber"></a><strong>getprotobynumber</strong>&nbsp;(proto)</dt>
1261 <dd>
1262
1263  Get protocol entry by number.
1264
1265
1266 <h3>Parameters</h3>
1267 <ul>
1268
1269         <li>
1270           proto: protocol number to lookup
1271         </li>
1272
1273 </ul>
1274
1275
1276
1277
1278 <h3>Usage:</h3>
1279 This function returns nil if the given protocol is unknown.
1280
1281
1282
1283 <h3>Return value:</h3>
1284 Table containing the following fields: <ul>
1285  <li>name = Protocol Name</li>
1286  <li>proto = Protocol Number</li>
1287  <li>aliases = Table of alias names</li>
1288  </ul>
1289
1290
1291
1292 </dd>
1293
1294
1295
1296
1297 <dt><a name="nixio.getpw"></a><strong>getpw</strong>&nbsp;(user)</dt>
1298 <dd>
1299
1300  (POSIX) Get all or a specific user account.
1301
1302
1303 <h3>Parameters</h3>
1304 <ul>
1305
1306         <li>
1307           user: User ID or username (optional)
1308         </li>
1309
1310 </ul>
1311
1312
1313
1314
1315
1316
1317 <h3>Return value:</h3>
1318 Table containing: <ul>
1319  <li>name = Name</li>
1320  <li>uid = ID</li>
1321  <li>gid = Group ID</li>
1322  <li>passwd = Password</li>
1323  <li>dir = Home directory</li>
1324  <li>gecos = Information</li>
1325  <li>shell = Shell</li>
1326  </ul>
1327
1328
1329
1330 </dd>
1331
1332
1333
1334
1335 <dt><a name="nixio.getsp"></a><strong>getsp</strong>&nbsp;(user)</dt>
1336 <dd>
1337
1338  (Linux, Solaris) Get all or a specific shadow password entry.
1339
1340
1341 <h3>Parameters</h3>
1342 <ul>
1343
1344         <li>
1345           user: username (optional)
1346         </li>
1347
1348 </ul>
1349
1350
1351
1352
1353
1354
1355 <h3>Return value:</h3>
1356 Table containing: <ul>
1357  <li>namp = Name</li>
1358  <li>expire = Expiration Date</li>
1359  <li>flag = Flags</li>
1360  <li>inact = Inactivity Date</li>
1361  <li>lstchg = Last change</li>
1362  <li>max = Maximum</li>
1363  <li>min = Minimum</li>
1364  <li>warn = Warning</li>
1365  <li>pwdp = Password Hash</li>
1366  </ul>
1367
1368
1369
1370 </dd>
1371
1372
1373
1374
1375 <dt><a name="nixio.getuid"></a><strong>getuid</strong>&nbsp;()</dt>
1376 <dd>
1377
1378  (POSIX) Get the user id of the current process.
1379
1380
1381
1382
1383
1384
1385
1386 <h3>Return value:</h3>
1387 process user id
1388
1389
1390
1391 </dd>
1392
1393
1394
1395
1396 <dt><a name="nixio.kill"></a><strong>kill</strong>&nbsp;(target, signal)</dt>
1397 <dd>
1398
1399  (POSIX) Send a signal to one or more processes.
1400
1401
1402 <h3>Parameters</h3>
1403 <ul>
1404
1405         <li>
1406           target: Target process of process group.
1407         </li>
1408
1409         <li>
1410           signal: Signal to send
1411         </li>
1412
1413 </ul>
1414
1415
1416
1417
1418
1419
1420 <h3>Return value:</h3>
1421 true
1422
1423
1424
1425 </dd>
1426
1427
1428
1429
1430 <dt><a name="nixio.nanosleep"></a><strong>nanosleep</strong>&nbsp;(seconds, nanoseconds)</dt>
1431 <dd>
1432
1433  Sleep for a specified amount of time.
1434
1435
1436 <h3>Parameters</h3>
1437 <ul>
1438
1439         <li>
1440           seconds: Seconds to wait (optional)
1441         </li>
1442
1443         <li>
1444           nanoseconds: Nanoseconds to wait (optional)
1445         </li>
1446
1447 </ul>
1448
1449
1450
1451
1452 <h3>Usage</h3>
1453 <ul>
1454
1455         <li>Not all systems support nanosecond precision but you can expect
1456  to have at least maillisecond precision.
1457
1458         <li>This function is not signal-protected and may fail with EINTR.
1459
1460 </ul>
1461
1462
1463
1464 <h3>Return value:</h3>
1465 true
1466
1467
1468
1469 </dd>
1470
1471
1472
1473
1474 <dt><a name="nixio.nice"></a><strong>nice</strong>&nbsp;(nice)</dt>
1475 <dd>
1476
1477  (POSIX) Change priority of current process.
1478
1479
1480 <h3>Parameters</h3>
1481 <ul>
1482
1483         <li>
1484           nice: Nice Value
1485         </li>
1486
1487 </ul>
1488
1489
1490
1491
1492
1493
1494 <h3>Return value:</h3>
1495 true
1496
1497
1498
1499 </dd>
1500
1501
1502
1503
1504 <dt><a name="nixio.open"></a><strong>open</strong>&nbsp;(path, flags, mode)</dt>
1505 <dd>
1506
1507  Open a file.
1508
1509
1510 <h3>Parameters</h3>
1511 <ul>
1512
1513         <li>
1514           path: Filesystem path to open
1515         </li>
1516
1517         <li>
1518           flags: Flag string or number (see open_flags).
1519  [<strong>"r"</strong>, "r+", "w", "w+", "a", "a+"]
1520         </li>
1521
1522         <li>
1523           mode: File mode for newly created files (see chmod, umask).
1524         </li>
1525
1526 </ul>
1527
1528
1529
1530
1531 <h3>Usage:</h3>
1532 Although this function also supports the traditional fopen()
1533  file flags it does not create a file stream but uses the open() syscall.
1534
1535
1536
1537 <h3>Return value:</h3>
1538 File Object
1539
1540
1541
1542 <h3>See also:</h3>
1543 <ul>
1544
1545         <li><a href="#nixio.umask">
1546                 umask
1547         </a>
1548
1549         <li><a href="#nixio.open_flags">
1550                 open_flags
1551         </a>
1552
1553 </ul>
1554
1555 </dd>
1556
1557
1558
1559
1560 <dt><a name="nixio.open_flags"></a><strong>open_flags</strong>&nbsp;(flag1, ...)</dt>
1561 <dd>
1562
1563  Generate flags for a call to open().
1564
1565
1566 <h3>Parameters</h3>
1567 <ul>
1568
1569         <li>
1570           flag1: First Flag ["append", "creat", "excl", "nonblock", "ndelay",
1571  "sync", "trunc", "rdonly", "wronly", "rdwr"]
1572         </li>
1573
1574         <li>
1575           ...: More Flags [-"-]
1576         </li>
1577
1578 </ul>
1579
1580
1581
1582
1583 <h3>Usage</h3>
1584 <ul>
1585
1586         <li>This function cannot fail and will never return nil.
1587
1588         <li>The "nonblock" and "ndelay" flags are aliases.
1589
1590         <li>The "nonblock", "ndelay" and "sync" flags are no-ops on Windows.
1591
1592 </ul>
1593
1594
1595
1596 <h3>Return value:</h3>
1597 flag to be used as second parameter to open
1598
1599
1600
1601 </dd>
1602
1603
1604
1605
1606 <dt><a name="nixio.openlog"></a><strong>openlog</strong>&nbsp;(ident, flag1, ...)</dt>
1607 <dd>
1608
1609  (POSIX) Open a connection to the system logger.
1610
1611
1612 <h3>Parameters</h3>
1613 <ul>
1614
1615         <li>
1616           ident: Identifier
1617         </li>
1618
1619         <li>
1620           flag1: Flag 1 ["cons", "nowait", "pid", "perror", "ndelay", "odelay"]
1621         </li>
1622
1623         <li>
1624           ...: More flags [-"-]
1625         </li>
1626
1627 </ul>
1628
1629
1630
1631
1632
1633
1634
1635
1636 </dd>
1637
1638
1639
1640
1641 <dt><a name="nixio.pipe"></a><strong>pipe</strong>&nbsp;()</dt>
1642 <dd>
1643
1644  Create a pipe.
1645
1646
1647
1648
1649
1650
1651
1652 <h3>Return values:</h3>
1653 <ol>
1654
1655         <li>File Object of the read end
1656
1657         <li>File Object of the write end
1658
1659 </ol>
1660
1661
1662
1663 </dd>
1664
1665
1666
1667
1668 <dt><a name="nixio.poll"></a><strong>poll</strong>&nbsp;(fds, timeout)</dt>
1669 <dd>
1670
1671  Wait for some event on a file descriptor.
1672  poll() sets the revents-field of the tables provided by fds to a bitfield
1673  indicating the events that occurred.
1674
1675
1676 <h3>Parameters</h3>
1677 <ul>
1678
1679         <li>
1680           fds: Table containing one or more tables containing <ul>
1681  <li> fd = I/O Descriptor [Socket Object, File Object (POSIX)]</li>
1682  <li> events = events to wait for (bitfield generated with poll_flags)</li>
1683  </ul>
1684         </li>
1685
1686         <li>
1687           timeout: Timeout in milliseconds
1688         </li>
1689
1690 </ul>
1691
1692
1693
1694
1695 <h3>Usage</h3>
1696 <ul>
1697
1698         <li>This function works in-place on the provided table and only
1699  writes the revents field, you can use other fields on your demand.
1700
1701         <li>All metamethods on the tables provided as fds are ignored.
1702
1703         <li>The revents-fields are not reset when the call times out.
1704  You have to check the first return value to be 0 to handle this case.
1705
1706         <li>If you want to wait on a TLS-Socket you have to use the underlying
1707  socket instead.
1708
1709         <li>On Windows poll is emulated through select(), can only be used
1710  on socket descriptors and cannot take more than 64 descriptors per call.
1711
1712         <li>This function is not signal-protected and may fail with EINTR.
1713
1714 </ul>
1715
1716
1717
1718 <h3>Return values:</h3>
1719 <ol>
1720
1721         <li>number of ready IO descriptors
1722
1723         <li>the fds-table with revents-fields set
1724
1725 </ol>
1726
1727
1728
1729 <h3>See also:</h3>
1730 <ul>
1731
1732         <li><a href="#nixio.poll_flags">
1733                 poll_flags
1734         </a>
1735
1736 </ul>
1737
1738 </dd>
1739
1740
1741
1742
1743 <dt><a name="nixio.poll_flags"></a><strong>poll_flags</strong>&nbsp;(mode1, ...)</dt>
1744 <dd>
1745
1746  Generate events-bitfield or parse revents-bitfield for poll.
1747
1748
1749 <h3>Parameters</h3>
1750 <ul>
1751
1752         <li>
1753           mode1: revents-Flag bitfield returned from poll to parse OR
1754  ["in", "out", "err", "pri" (POSIX), "hup" (POSIX), "nval" (POSIX)]
1755         </li>
1756
1757         <li>
1758           ...: More mode strings for generating the flag [-"-]
1759         </li>
1760
1761 </ul>
1762
1763
1764
1765
1766
1767
1768 <h3>Return value:</h3>
1769 table with boolean fields reflecting the mode parameter
1770  <strong>OR</strong> bitfield to use for the events-Flag field
1771
1772
1773
1774 <h3>See also:</h3>
1775 <ul>
1776
1777         <li><a href="#nixio.poll">
1778                 poll
1779         </a>
1780
1781 </ul>
1782
1783 </dd>
1784
1785
1786
1787
1788 <dt><a name="nixio.sendfile"></a><strong>sendfile</strong>&nbsp;(socket, file, length)</dt>
1789 <dd>
1790
1791  (POSIX) Send data from a file to a socket in kernel-space.
1792
1793
1794 <h3>Parameters</h3>
1795 <ul>
1796
1797         <li>
1798           socket: Socket Object
1799         </li>
1800
1801         <li>
1802           file: File Object
1803         </li>
1804
1805         <li>
1806           length: Amount of data to send (in Bytes).
1807         </li>
1808
1809 </ul>
1810
1811
1812
1813
1814
1815
1816 <h3>Return value:</h3>
1817 bytes sent
1818
1819
1820
1821 </dd>
1822
1823
1824
1825
1826 <dt><a name="nixio.setenv"></a><strong>setenv</strong>&nbsp;(variable, value)</dt>
1827 <dd>
1828
1829  Set or unset a environment variable.
1830
1831
1832 <h3>Parameters</h3>
1833 <ul>
1834
1835         <li>
1836           variable: Variable
1837         </li>
1838
1839         <li>
1840           value: Value (optional)
1841         </li>
1842
1843 </ul>
1844
1845
1846
1847
1848 <h3>Usage:</h3>
1849 The environment variable will be unset if value is omitted.
1850
1851
1852
1853 <h3>Return value:</h3>
1854 true
1855
1856
1857
1858 </dd>
1859
1860
1861
1862
1863 <dt><a name="nixio.setgid"></a><strong>setgid</strong>&nbsp;(gid)</dt>
1864 <dd>
1865
1866  (POSIX) Set the group id of the current process.
1867
1868
1869 <h3>Parameters</h3>
1870 <ul>
1871
1872         <li>
1873           gid: New Group ID
1874         </li>
1875
1876 </ul>
1877
1878
1879
1880
1881
1882
1883 <h3>Return value:</h3>
1884 true
1885
1886
1887
1888 </dd>
1889
1890
1891
1892
1893 <dt><a name="nixio.setlogmask"></a><strong>setlogmask</strong>&nbsp;(priority)</dt>
1894 <dd>
1895
1896  (POSIX) Set the logmask of the system logger for current process.
1897
1898
1899 <h3>Parameters</h3>
1900 <ul>
1901
1902         <li>
1903           priority: Priority ["emerg", "alert", "crit", "err", "warning",
1904  "notice", "info", "debug"]
1905         </li>
1906
1907 </ul>
1908
1909
1910
1911
1912
1913
1914
1915
1916 </dd>
1917
1918
1919
1920
1921 <dt><a name="nixio.setsid"></a><strong>setsid</strong>&nbsp;()</dt>
1922 <dd>
1923
1924  (POSIX) Create a new session and set the process group ID.
1925
1926
1927
1928
1929
1930
1931
1932 <h3>Return value:</h3>
1933 session id
1934
1935
1936
1937 </dd>
1938
1939
1940
1941
1942 <dt><a name="nixio.setuid"></a><strong>setuid</strong>&nbsp;(gid)</dt>
1943 <dd>
1944
1945  (POSIX) Set the user id of the current process.
1946
1947
1948 <h3>Parameters</h3>
1949 <ul>
1950
1951         <li>
1952           gid: New User ID
1953         </li>
1954
1955 </ul>
1956
1957
1958
1959
1960
1961
1962 <h3>Return value:</h3>
1963 true
1964
1965
1966
1967 </dd>
1968
1969
1970
1971
1972 <dt><a name="nixio.signal"></a><strong>signal</strong>&nbsp;(signal, handler)</dt>
1973 <dd>
1974
1975  Ignore or use set the default handler for a signal.
1976
1977
1978 <h3>Parameters</h3>
1979 <ul>
1980
1981         <li>
1982           signal: Signal
1983         </li>
1984
1985         <li>
1986           handler: ["ign", "dfl"]
1987         </li>
1988
1989 </ul>
1990
1991
1992
1993
1994
1995
1996 <h3>Return value:</h3>
1997 true
1998
1999
2000
2001 </dd>
2002
2003
2004
2005
2006 <dt><a name="nixio.socket"></a><strong>socket</strong>&nbsp;(domain, type)</dt>
2007 <dd>
2008
2009  Create a new socket.
2010
2011
2012 <h3>Parameters</h3>
2013 <ul>
2014
2015         <li>
2016           domain: Domain ["inet", "inet6", "unix"]
2017         </li>
2018
2019         <li>
2020           type: Type   ["stream", "dgram", "raw"]
2021         </li>
2022
2023 </ul>
2024
2025
2026
2027
2028
2029
2030 <h3>Return value:</h3>
2031 Socket Object
2032
2033
2034
2035 </dd>
2036
2037
2038
2039
2040 <dt><a name="nixio.splice"></a><strong>splice</strong>&nbsp;(fdin, fdout, length, flags)</dt>
2041 <dd>
2042
2043  (Linux) Send data from / to a pipe in kernel-space.
2044
2045
2046 <h3>Parameters</h3>
2047 <ul>
2048
2049         <li>
2050           fdin: Input I/O descriptor
2051         </li>
2052
2053         <li>
2054           fdout: Output I/O descriptor
2055         </li>
2056
2057         <li>
2058           length: Amount of data to send (in Bytes).
2059         </li>
2060
2061         <li>
2062           flags: (optional, bitfield generated by splice_flags)
2063         </li>
2064
2065 </ul>
2066
2067
2068
2069
2070
2071
2072 <h3>Return value:</h3>
2073 bytes sent
2074
2075
2076
2077 <h3>See also:</h3>
2078 <ul>
2079
2080         <li><a href="#nixio.splice_flags">
2081                 splice_flags
2082         </a>
2083
2084 </ul>
2085
2086 </dd>
2087
2088
2089
2090
2091 <dt><a name="nixio.splice_flags"></a><strong>splice_flags</strong>&nbsp;(flag1, ...)</dt>
2092 <dd>
2093
2094  (Linux) Generate a flag bitfield for a call to splice.
2095
2096
2097 <h3>Parameters</h3>
2098 <ul>
2099
2100         <li>
2101           flag1: First Flag     ["move", "nonblock", "more"]
2102         </li>
2103
2104         <li>
2105           ...: More flags       [-"-]
2106         </li>
2107
2108 </ul>
2109
2110
2111
2112
2113
2114
2115 <h3>Return value:</h3>
2116 Flag bitfield
2117
2118
2119
2120 <h3>See also:</h3>
2121 <ul>
2122
2123         <li><a href="#nixio.splice">
2124                 splice
2125         </a>
2126
2127 </ul>
2128
2129 </dd>
2130
2131
2132
2133
2134 <dt><a name="nixio.strerror"></a><strong>strerror</strong>&nbsp;(errno)</dt>
2135 <dd>
2136
2137  Get the error message for the corresponding error code.
2138
2139
2140 <h3>Parameters</h3>
2141 <ul>
2142
2143         <li>
2144           errno: System error code
2145         </li>
2146
2147 </ul>
2148
2149
2150
2151
2152
2153
2154 <h3>Return value:</h3>
2155 Error message
2156
2157
2158
2159 </dd>
2160
2161
2162
2163
2164 <dt><a name="nixio.sysinfo"></a><strong>sysinfo</strong>&nbsp;()</dt>
2165 <dd>
2166
2167  (Linux) Get overall system statistics.
2168
2169
2170
2171
2172
2173
2174
2175 <h3>Return value:</h3>
2176 Table containing: <ul>
2177  <li>uptime = system uptime in seconds</li>
2178  <li>loads = {loadavg1, loadavg5, loadavg15}</li>
2179  <li>totalram = total RAM</li>
2180  <li>freeram = free RAM</li>
2181  <li>sharedram = shared RAM</li>
2182  <li>bufferram = buffered RAM</li>
2183  <li>totalswap = total SWAP</li>
2184  <li>freeswap = free SWAP</li>
2185  <li>procs = number of running processes</li>
2186  </ul>
2187
2188
2189
2190 </dd>
2191
2192
2193
2194
2195 <dt><a name="nixio.syslog"></a><strong>syslog</strong>&nbsp;(priority)</dt>
2196 <dd>
2197
2198  (POSIX) Write a message to the system logger.
2199
2200
2201 <h3>Parameters</h3>
2202 <ul>
2203
2204         <li>
2205           priority: Priority ["emerg", "alert", "crit", "err", "warning",
2206  "notice", "info", "debug"]
2207         </li>
2208
2209 </ul>
2210
2211
2212
2213
2214
2215
2216
2217
2218 </dd>
2219
2220
2221
2222
2223 <dt><a name="nixio.times"></a><strong>times</strong>&nbsp;()</dt>
2224 <dd>
2225
2226  (POSIX) Get process times.
2227
2228
2229
2230
2231
2232
2233
2234 <h3>Return value:</h3>
2235 Table containing: <ul>
2236  <li>utime = user time</li>
2237  <li>utime = system time</li>
2238  <li>cutime = children user time</li>
2239  <li>cstime = children system time</li>
2240  </ul>
2241
2242
2243
2244 </dd>
2245
2246
2247
2248
2249 <dt><a name="nixio.tls"></a><strong>tls</strong>&nbsp;(mode)</dt>
2250 <dd>
2251
2252  Create a new TLS context.
2253
2254
2255 <h3>Parameters</h3>
2256 <ul>
2257
2258         <li>
2259           mode: TLS-Mode ["client", "server"]
2260         </li>
2261
2262 </ul>
2263
2264
2265
2266
2267
2268
2269 <h3>Return value:</h3>
2270 TLSContext Object
2271
2272
2273
2274 </dd>
2275
2276
2277
2278
2279 <dt><a name="nixio.umask"></a><strong>umask</strong>&nbsp;(mask)</dt>
2280 <dd>
2281
2282  Sets the file mode creation mask.
2283
2284
2285 <h3>Parameters</h3>
2286 <ul>
2287
2288         <li>
2289           mask: New creation mask (see chmod for format specifications)
2290         </li>
2291
2292 </ul>
2293
2294
2295
2296
2297
2298
2299 <h3>Return values:</h3>
2300 <ol>
2301
2302         <li>the old umask as decimal mode number
2303
2304         <li>the old umask as mode string
2305
2306 </ol>
2307
2308
2309
2310 </dd>
2311
2312
2313
2314
2315 <dt><a name="nixio.uname"></a><strong>uname</strong>&nbsp;()</dt>
2316 <dd>
2317
2318  (POSIX) Get information about current system and kernel.
2319
2320
2321
2322
2323
2324
2325
2326 <h3>Return value:</h3>
2327 Table containing: <ul>
2328  <li>sysname = operating system</li>
2329  <li>nodename = network name (usually hostname)</li>
2330  <li>release = OS release</li>
2331  <li>version = OS version</li>
2332  <li>machine = hardware identifier</li>
2333  </ul>
2334
2335
2336
2337 </dd>
2338
2339
2340
2341
2342 <dt><a name="nixio.waitpid"></a><strong>waitpid</strong>&nbsp;(pid, flag1, ...)</dt>
2343 <dd>
2344
2345  (POSIX) Wait for a process to change state.
2346
2347
2348 <h3>Parameters</h3>
2349 <ul>
2350
2351         <li>
2352           pid: Process ID       (optional, default: any childprocess)
2353         </li>
2354
2355         <li>
2356           flag1: Flag   (optional) ["nohang", "untraced", "continued"]
2357         </li>
2358
2359         <li>
2360           ...: More Flags [-"-]
2361         </li>
2362
2363 </ul>
2364
2365
2366
2367
2368 <h3>Usage:</h3>
2369 If the "nohang" is given this function becomes non-blocking.
2370
2371
2372
2373 <h3>Return values:</h3>
2374 <ol>
2375
2376         <li>process id of child or 0 if no child has changed state
2377
2378         <li>["exited", "signaled", "stopped"]
2379
2380         <li>[exit code, terminate signal, stop signal]
2381
2382 </ol>
2383
2384
2385
2386 </dd>
2387
2388
2389 </dl>
2390
2391
2392
2393
2394
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