| 1 | /* Minimum guaranteed maximum values for system limits. Linux version. |
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| 2 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public License as |
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| 7 | published by the Free Software Foundation; either version 2.1 of the |
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| 8 | License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
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| 17 | not, see <http://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* The kernel header pollutes the namespace with the NR_OPEN symbol |
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| 20 | and defines LINK_MAX although filesystems have different maxima. A |
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| 21 | similar thing is true for OPEN_MAX: the limit can be changed at |
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| 22 | runtime and therefore the macro must not be defined. Remove this |
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| 23 | after including the header if necessary. */ |
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| 24 | #ifndef NR_OPEN |
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| 25 | # define __undef_NR_OPEN |
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| 26 | #endif |
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| 27 | #ifndef LINK_MAX |
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| 28 | # define __undef_LINK_MAX |
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| 29 | #endif |
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| 30 | #ifndef OPEN_MAX |
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| 31 | # define __undef_OPEN_MAX |
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| 32 | #endif |
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| 33 | #ifndef ARG_MAX |
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| 34 | # define __undef_ARG_MAX |
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| 35 | #endif |
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| 36 | |
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| 37 | /* The kernel sources contain a file with all the needed information. */ |
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| 38 | #include <linux/limits.h> |
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| 39 | |
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| 40 | /* Have to remove NR_OPEN? */ |
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| 41 | #ifdef __undef_NR_OPEN |
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| 42 | # undef NR_OPEN |
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| 43 | # undef __undef_NR_OPEN |
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| 44 | #endif |
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| 45 | /* Have to remove LINK_MAX? */ |
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| 46 | #ifdef __undef_LINK_MAX |
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| 47 | # undef LINK_MAX |
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| 48 | # undef __undef_LINK_MAX |
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| 49 | #endif |
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| 50 | /* Have to remove OPEN_MAX? */ |
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| 51 | #ifdef __undef_OPEN_MAX |
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| 52 | # undef OPEN_MAX |
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| 53 | # undef __undef_OPEN_MAX |
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| 54 | #endif |
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| 55 | /* Have to remove ARG_MAX? */ |
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| 56 | #ifdef __undef_ARG_MAX |
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| 57 | # undef ARG_MAX |
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| 58 | # undef __undef_ARG_MAX |
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| 59 | #endif |
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| 60 | |
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| 61 | /* The number of data keys per process. */ |
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| 62 | #define _POSIX_THREAD_KEYS_MAX 128 |
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| 63 | /* This is the value this implementation supports. */ |
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| 64 | #define PTHREAD_KEYS_MAX 1024 |
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| 65 | |
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| 66 | /* Controlling the iterations of destructors for thread-specific data. */ |
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| 67 | #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4 |
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| 68 | /* Number of iterations this implementation does. */ |
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| 69 | #define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS |
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| 70 | |
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| 71 | /* The number of threads per process. */ |
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| 72 | #define _POSIX_THREAD_THREADS_MAX 64 |
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| 73 | /* We have no predefined limit on the number of threads. */ |
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| 74 | #undef PTHREAD_THREADS_MAX |
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| 75 | |
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| 76 | /* Maximum amount by which a process can descrease its asynchronous I/O |
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| 77 | priority level. */ |
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| 78 | #define AIO_PRIO_DELTA_MAX 20 |
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| 79 | |
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| 80 | /* Minimum size for a thread. We are free to choose a reasonable value. */ |
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| 81 | #define PTHREAD_STACK_MIN 16384 |
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| 82 | |
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| 83 | /* Maximum number of timer expiration overruns. */ |
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| 84 | #define DELAYTIMER_MAX 2147483647 |
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| 85 | |
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| 86 | /* Maximum tty name length. */ |
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| 87 | #define TTY_NAME_MAX 32 |
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| 88 | |
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| 89 | /* Maximum login name length. This is arbitrary. */ |
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| 90 | #define LOGIN_NAME_MAX 256 |
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| 91 | |
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| 92 | /* Maximum host name length. */ |
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| 93 | #define HOST_NAME_MAX 64 |
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| 94 | |
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| 95 | /* Maximum message queue priority level. */ |
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| 96 | #define MQ_PRIO_MAX 32768 |
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| 97 | |
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| 98 | /* Maximum value the semaphore can have. */ |
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| 99 | #define SEM_VALUE_MAX (2147483647) |
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| 100 | |
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