resource.h 6.2 KB

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  1. /* Bit values & structures for resource limits. Linux version.
  2. Copyright (C) 1994, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Library General Public License as
  6. published by the Free Software Foundation; either version 2 of the
  7. License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Library General Public License for more details.
  12. You should have received a copy of the GNU Library General Public
  13. License along with the GNU C Library; see the file COPYING.LIB. If not,
  14. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  15. Boston, MA 02111-1307, USA. */
  16. #ifndef _SYS_RESOURCE_H
  17. # error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
  18. #endif
  19. #include <bits/types.h>
  20. /* Transmute defines to enumerations. The macro re-definitions are
  21. necessary because some programs want to test for operating system
  22. features with #ifdef RUSAGE_SELF. In ISO C the reflexive
  23. definition is a no-op. */
  24. /* Kinds of resource limit. */
  25. enum __rlimit_resource
  26. {
  27. /* Per-process CPU limit, in seconds. */
  28. RLIMIT_CPU = 0,
  29. #define RLIMIT_CPU RLIMIT_CPU
  30. /* Largest file that can be created, in bytes. */
  31. RLIMIT_FSIZE = 1,
  32. #define RLIMIT_FSIZE RLIMIT_FSIZE
  33. /* Maximum size of data segment, in bytes. */
  34. RLIMIT_DATA = 2,
  35. #define RLIMIT_DATA RLIMIT_DATA
  36. /* Maximum size of stack segment, in bytes. */
  37. RLIMIT_STACK = 3,
  38. #define RLIMIT_STACK RLIMIT_STACK
  39. /* Largest core file that can be created, in bytes. */
  40. RLIMIT_CORE = 4,
  41. #define RLIMIT_CORE RLIMIT_CORE
  42. /* Largest resident set size, in bytes.
  43. This affects swapping; processes that are exceeding their
  44. resident set size will be more likely to have physical memory
  45. taken from them. */
  46. RLIMIT_RSS = 5,
  47. #define RLIMIT_RSS RLIMIT_RSS
  48. /* Number of open files. */
  49. RLIMIT_NOFILE = 7,
  50. RLIMIT_OFILE = RLIMIT_NOFILE, /* BSD name for same. */
  51. #define RLIMIT_NOFILE RLIMIT_NOFILE
  52. #define RLIMIT_OFILE RLIMIT_OFILE
  53. /* Address space limit (?) */
  54. RLIMIT_AS = 9,
  55. #define RLIMIT_AS RLIMIT_AS
  56. /* Number of processes. */
  57. RLIMIT_NPROC = 6,
  58. #define RLIMIT_NPROC RLIMIT_NPROC
  59. /* Locked-in-memory address space. */
  60. RLIMIT_MEMLOCK = 8,
  61. #define RLIMIT_MEMLOCK RLIMIT_MEMLOCK
  62. RLIM_NLIMITS = 10
  63. #define RLIMIT_NLIMITS RLIMIT_NLIMITS
  64. #define RLIM_NLIMITS RLIM_NLIMITS
  65. };
  66. /* Value to indicate that there is no limit. */
  67. #ifndef __USE_FILE_OFFSET64
  68. # define RLIM_INFINITY ((long int)(~0UL >> 1))
  69. #else
  70. # define RLIM_INFINITY 0x7fffffffffffffffLL
  71. #endif
  72. #ifdef __USE_LARGEFILE64
  73. # define RLIM64_INFINITY 0x7fffffffffffffffLL
  74. #endif
  75. /* We can represent all limits. */
  76. #define RLIM_SAVED_MAX RLIM_INFINITY
  77. #define RLIM_SAVED_CUR RLIM_INFINITY
  78. /* Type for resource quantity measurement. */
  79. #ifndef __USE_FILE_OFFSET64
  80. typedef __rlim_t rlim_t;
  81. #else
  82. typedef __rlim64_t rlim_t;
  83. #endif
  84. #ifdef __USE_LARGEFILE64
  85. typedef __rlim64_t rlim64_t;
  86. #endif
  87. struct rlimit
  88. {
  89. /* The current (soft) limit. */
  90. rlim_t rlim_cur;
  91. /* The hard limit. */
  92. rlim_t rlim_max;
  93. };
  94. #ifdef __USE_LARGEFILE64
  95. struct rlimit64
  96. {
  97. /* The current (soft) limit. */
  98. rlim64_t rlim_cur;
  99. /* The hard limit. */
  100. rlim64_t rlim_max;
  101. };
  102. #endif
  103. /* Whose usage statistics do you want? */
  104. enum __rusage_who
  105. {
  106. /* The calling process. */
  107. RUSAGE_SELF = 0,
  108. #define RUSAGE_SELF RUSAGE_SELF
  109. /* All of its terminated child processes. */
  110. RUSAGE_CHILDREN = -1,
  111. #define RUSAGE_CHILDREN RUSAGE_CHILDREN
  112. /* Both. */
  113. RUSAGE_BOTH = -2
  114. #define RUSAGE_BOTH RUSAGE_BOTH
  115. };
  116. #define __need_timeval
  117. #include <bits/time.h> /* For `struct timeval'. */
  118. /* Structure which says how much of each resource has been used. */
  119. struct rusage
  120. {
  121. /* Total amount of user time used. */
  122. struct timeval ru_utime;
  123. /* Total amount of system time used. */
  124. struct timeval ru_stime;
  125. /* Maximum resident set size (in kilobytes). */
  126. long int ru_maxrss;
  127. /* Amount of sharing of text segment memory
  128. with other processes (kilobyte-seconds). */
  129. long int ru_ixrss;
  130. /* Amount of data segment memory used (kilobyte-seconds). */
  131. long int ru_idrss;
  132. /* Amount of stack memory used (kilobyte-seconds). */
  133. long int ru_isrss;
  134. /* Number of soft page faults (i.e. those serviced by reclaiming
  135. a page from the list of pages awaiting reallocation. */
  136. long int ru_minflt;
  137. /* Number of hard page faults (i.e. those that required I/O). */
  138. long int ru_majflt;
  139. /* Number of times a process was swapped out of physical memory. */
  140. long int ru_nswap;
  141. /* Number of input operations via the file system. Note: This
  142. and `ru_oublock' do not include operations with the cache. */
  143. long int ru_inblock;
  144. /* Number of output operations via the file system. */
  145. long int ru_oublock;
  146. /* Number of IPC messages sent. */
  147. long int ru_msgsnd;
  148. /* Number of IPC messages received. */
  149. long int ru_msgrcv;
  150. /* Number of signals delivered. */
  151. long int ru_nsignals;
  152. /* Number of voluntary context switches, i.e. because the process
  153. gave up the process before it had to (usually to wait for some
  154. resource to be available). */
  155. long int ru_nvcsw;
  156. /* Number of involuntary context switches, i.e. a higher priority process
  157. became runnable or the current process used up its time slice. */
  158. long int ru_nivcsw;
  159. };
  160. /* Priority limits. */
  161. #define PRIO_MIN -20 /* Minimum priority a process can have. */
  162. #define PRIO_MAX 20 /* Maximum priority a process can have. */
  163. /* The type of the WHICH argument to `getpriority' and `setpriority',
  164. indicating what flavor of entity the WHO argument specifies. */
  165. enum __priority_which
  166. {
  167. PRIO_PROCESS = 0, /* WHO is a process ID. */
  168. #define PRIO_PROCESS PRIO_PROCESS
  169. PRIO_PGRP = 1, /* WHO is a process group ID. */
  170. #define PRIO_PGRP PRIO_PGRP
  171. PRIO_USER = 2 /* WHO is a user ID. */
  172. #define PRIO_USER PRIO_USER
  173. };