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utmpx.h.0p (3399B)

    

  1. '\" et
  2. .TH utmpx.h "0P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
  3. .\"
  4. .SH PROLOG
  5. This manual page is part of the POSIX Programmer's Manual.
  6. The Linux implementation of this interface may differ (consult
  7. the corresponding Linux manual page for details of Linux behavior),
  8. or the interface may not be implemented on Linux.
  9. .\"
  10. .SH NAME
  11. utmpx.h
  12. \(em user accounting database definitions
  13. .SH SYNOPSIS
  14. .LP
  15. .nf
  16. #include <utmpx.h>
  17. .fi
  18. .SH DESCRIPTION
  19. The
  20. .IR <utmpx.h> 
  21. header shall define the
  22. .BR utmpx
  23. structure that shall include at least the following members:
  24. .sp
  25. .RS 4
  26. .nf
  28. char            ut_user[]  \fRUser login name.\fR
  29. char            ut_id[]    \fRUnspecified initialization process identifier.\fR
  30. char            ut_line[]  \fRDevice name.\fR
  31. pid_t           ut_pid     \fRProcess ID.\fR
  32. short           ut_type    \fRType of entry.\fR
  33. struct timeval  ut_tv      \fRTime entry was made.\fR
  34. .fi
  35. .P
  36. .RE
  37. .P
  38. The
  39. .IR <utmpx.h> 
  40. header shall define the
  41. .BR pid_t
  42. type through
  43. .BR typedef ,
  44. as described in
  45. .IR <sys/types.h> .
  46. .P
  47. The
  48. .IR <utmpx.h> 
  49. header shall define the
  50. .BR timeval
  51. structure as described in
  52. .IR <sys/time.h> .
  53. .P
  54. Inclusion of the
  55. .IR <utmpx.h> 
  56. header may also make visible all symbols from
  57. .IR <sys/time.h> .
  58. .P
  59. The
  60. .IR <utmpx.h> 
  61. header shall define the following symbolic constants as possible values
  62. for the
  63. .IR ut_type
  64. member of the
  65. .BR utmpx
  66. structure:
  67. .IP EMPTY 14
  68. No valid user accounting information.
  69. .IP BOOT_TIME 14
  70. Identifies time of system boot.
  71. .IP OLD_TIME 14
  72. Identifies time when system clock changed.
  73. .IP NEW_TIME 14
  74. Identifies time after system clock changed.
  75. .IP USER_PROCESS 14
  76. Identifies a process.
  77. .IP INIT_PROCESS 14
  78. Identifies a process spawned by the init process.
  79. .IP LOGIN_PROCESS 14
  80. Identifies the session leader of a logged-in user.
  81. .IP DEAD_PROCESS 14
  82. Identifies a session leader who has exited.
  83. .P
  84. The following shall be declared as functions and may also be defined
  85. as macros. Function prototypes shall be provided.
  86. .sp
  87. .RS 4
  88. .nf
  90. void          endutxent(void);
  91. struct utmpx *getutxent(void);
  92. struct utmpx *getutxid(const struct utmpx *);
  93. struct utmpx *getutxline(const struct utmpx *);
  94. struct utmpx *pututxline(const struct utmpx *);
  95. void          setutxent(void);
  96. .fi
  97. .P
  98. .RE
  99. .LP
  100. .IR "The following sections are informative."
  101. .SH "APPLICATION USAGE"
  102. None.
  103. .SH RATIONALE
  104. None.
  105. .SH "FUTURE DIRECTIONS"
  106. None.
  107. .SH "SEE ALSO"
  108. .IR "\fB<sys_time.h>\fP",
  109. .IR "\fB<sys_types.h>\fP"
  110. .P
  111. The System Interfaces volume of POSIX.1\(hy2017,
  112. .IR "\fIendutxent\fR\^(\|)"
  113. .\"
  114. .SH COPYRIGHT
  115. Portions of this text are reprinted and reproduced in electronic form
  116. from IEEE Std 1003.1-2017, Standard for Information Technology
  117. -- Portable Operating System Interface (POSIX), The Open Group Base
  118. Specifications Issue 7, 2018 Edition,
  119. Copyright (C) 2018 by the Institute of
  120. Electrical and Electronics Engineers, Inc and The Open Group.
  121. In the event of any discrepancy between this version and the original IEEE and
  122. The Open Group Standard, the original IEEE and The Open Group Standard
  123. is the referee document. The original Standard can be obtained online at
  124. http://www.opengroup.org/unix/online.html .
  125. .PP
  126. Any typographical or formatting errors that appear
  127. in this page are most likely
  128. to have been introduced during the conversion of the source files to
  129. man page format. To report such errors, see
  130. https://www.kernel.org/doc/man-pages/reporting_bugs.html .