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sys_statvfs.h.0p (3206B)

    

  1. '\" et
  2. .TH sys_statvfs.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. sys/statvfs.h
  12. \(em VFS File System information structure
  13. .SH SYNOPSIS
  14. .LP
  15. .nf
  16. #include <sys/statvfs.h>
  17. .fi
  18. .SH DESCRIPTION
  19. The
  20. .IR <sys/statvfs.h> 
  21. header shall define the
  22. .BR statvfs
  23. structure, which shall include at least the following members:
  24. .sp
  25. .RS 4
  26. .nf
  28. unsigned long f_bsize    \fRFile system block size.\fR
  29. unsigned long f_frsize   \fRFundamental file system block size.\fR
  30. fsblkcnt_t    f_blocks   \fRTotal number of blocks on file system in units of \fIf_frsize.\fR
  31. fsblkcnt_t    f_bfree    \fRTotal number of free blocks.\fR
  32. fsblkcnt_t    f_bavail   \fRNumber of free blocks available to\fR
  33.                          \fRnon-privileged process.\fR
  34. fsfilcnt_t    f_files    \fRTotal number of file serial numbers.\fR
  35. fsfilcnt_t    f_ffree    \fRTotal number of free file serial numbers.\fR
  36. fsfilcnt_t    f_favail   \fRNumber of file serial numbers available to\fR
  37.                          \fRnon-privileged process.\fR
  38. unsigned long f_fsid     \fRFile system ID.\fR
  39. unsigned long f_flag     \fRBit mask of \fIf_flag\fR values.\fR
  40. unsigned long f_namemax  \fRMaximum filename length.\fR
  41. .fi
  42. .P
  43. .RE
  44. .P
  45. The
  46. .IR <sys/statvfs.h> 
  47. header shall define the
  48. .BR fsblkcnt_t
  49. and
  50. .BR fsfilcnt_t
  51. types as described in
  52. .IR <sys/types.h> .
  53. .P
  54. The
  55. .IR <sys/statvfs.h> 
  56. header shall define the following symbolic constants for the
  57. .IR f_flag
  58. member:
  59. .IP ST_RDONLY 12
  60. Read-only file system.
  61. .IP ST_NOSUID 12
  62. Does not support the semantics of the ST_ISUID and ST_ISGID file mode
  63. bits.
  64. .P
  65. The following shall be declared as functions and may also be defined as
  66. macros. Function prototypes shall be provided.
  67. .sp
  68. .RS 4
  69. .nf
  71. int fstatvfs(int, struct statvfs *);
  72. int statvfs(const char *restrict, struct statvfs *restrict);
  73. .fi
  74. .P
  75. .RE
  76. .LP
  77. .IR "The following sections are informative."
  78. .SH "APPLICATION USAGE"
  79. None.
  80. .SH RATIONALE
  81. None.
  82. .SH "FUTURE DIRECTIONS"
  83. None.
  84. .SH "SEE ALSO"
  85. .IR "\fB<sys_types.h>\fP"
  86. .P
  87. The System Interfaces volume of POSIX.1\(hy2017,
  88. .IR "\fIfstatvfs\fR\^(\|)"
  89. .\"
  90. .SH COPYRIGHT
  91. Portions of this text are reprinted and reproduced in electronic form
  92. from IEEE Std 1003.1-2017, Standard for Information Technology
  93. -- Portable Operating System Interface (POSIX), The Open Group Base
  94. Specifications Issue 7, 2018 Edition,
  95. Copyright (C) 2018 by the Institute of
  96. Electrical and Electronics Engineers, Inc and The Open Group.
  97. In the event of any discrepancy between this version and the original IEEE and
  98. The Open Group Standard, the original IEEE and The Open Group Standard
  99. is the referee document. The original Standard can be obtained online at
  100. http://www.opengroup.org/unix/online.html .
  101. .PP
  102. Any typographical or formatting errors that appear
  103. in this page are most likely
  104. to have been introduced during the conversion of the source files to
  105. man page format. To report such errors, see
  106. https://www.kernel.org/doc/man-pages/reporting_bugs.html .