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ndbm.h.0p (2855B)

    

  1. '\" et
  2. .TH ndbm.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. ndbm.h
  12. \(em definitions for ndbm database operations
  13. .SH SYNOPSIS
  14. .LP
  15. .nf
  16. #include <ndbm.h>
  17. .fi
  18. .SH DESCRIPTION
  19. The
  20. .IR <ndbm.h> 
  21. header shall define the
  22. .BR datum
  23. type as a structure, which shall include at least the following members:
  24. .sp
  25. .RS 4
  26. .nf
  28. void   *dptr  \fRA pointer to the application's data.\fR
  29. size_t  dsize \fRThe size of the object pointed to by \fIdptr.\fR
  30. .fi
  31. .P
  32. .RE
  33. .P
  34. The
  35. .IR <ndbm.h> 
  36. header shall define the
  37. .BR size_t
  38. type as described in
  39. .IR <stddef.h> .
  40. .P
  41. The
  42. .IR <ndbm.h> 
  43. header shall define the
  44. .BR DBM
  45. type.
  46. .P
  47. The
  48. .IR <ndbm.h> 
  49. header shall define the following symbolic constants as possible
  50. values for the
  51. .IR store_mode
  52. argument to
  53. \fIdbm_store\fR():
  54. .IP DBM_INSERT 14
  55. Insertion of new entries only.
  56. .IP DBM_REPLACE 14
  57. Allow replacing existing entries.
  58. .P
  59. The following shall be declared as functions and may also be defined as
  60. macros. Function prototypes shall be provided.
  61. .sp
  62. .RS 4
  63. .nf
  65. int     dbm_clearerr(DBM *);
  66. void    dbm_close(DBM *);
  67. int     dbm_delete(DBM *, datum);
  68. int     dbm_error(DBM *);
  69. datum   dbm_fetch(DBM *, datum);
  70. datum   dbm_firstkey(DBM *);
  71. datum   dbm_nextkey(DBM *);
  72. DBM    *dbm_open(const char *, int, mode_t);
  73. int     dbm_store(DBM *, datum, datum, int);
  74. .fi
  75. .P
  76. .RE
  77. .P
  78. The
  79. .IR <ndbm.h> 
  80. header shall define the
  81. .BR mode_t
  82. type through
  83. .BR typedef ,
  84. as described in
  85. .IR <sys/types.h> .
  86. .LP
  87. .IR "The following sections are informative."
  88. .SH "APPLICATION USAGE"
  89. None.
  90. .SH RATIONALE
  91. None.
  92. .SH "FUTURE DIRECTIONS"
  93. None.
  94. .SH "SEE ALSO"
  95. .IR "\fB<stddef.h>\fP",
  96. .IR "\fB<sys_types.h>\fP"
  97. .P
  98. The System Interfaces volume of POSIX.1\(hy2017,
  99. .IR "\fIdbm_clearerr\fR\^(\|)"
  100. .\"
  101. .SH COPYRIGHT
  102. Portions of this text are reprinted and reproduced in electronic form
  103. from IEEE Std 1003.1-2017, Standard for Information Technology
  104. -- Portable Operating System Interface (POSIX), The Open Group Base
  105. Specifications Issue 7, 2018 Edition,
  106. Copyright (C) 2018 by the Institute of
  107. Electrical and Electronics Engineers, Inc and The Open Group.
  108. In the event of any discrepancy between this version and the original IEEE and
  109. The Open Group Standard, the original IEEE and The Open Group Standard
  110. is the referee document. The original Standard can be obtained online at
  111. http://www.opengroup.org/unix/online.html .
  112. .PP
  113. Any typographical or formatting errors that appear
  114. in this page are most likely
  115. to have been introduced during the conversion of the source files to
  116. man page format. To report such errors, see
  117. https://www.kernel.org/doc/man-pages/reporting_bugs.html .