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The GNU C Library

31. System Configuration Parameters

The functions and macros listed in this chapter give information about configuration parameters of the operating system--for example, capacity limits, presence of optional POSIX features, and the default path for executable files (see section 31.12 String-Valued Parameters).

31.1 General Capacity Limits		Constants and functions that describe various process-related limits that have one uniform value for any given machine.
31.2 Overall System Options		Optional POSIX features.
31.3 Which Version of POSIX is Supported		Version numbers of POSIX.1 and POSIX.2.
31.4 Using sysconf		Getting specific configuration values of general limits and system options.
31.5 Minimum Values for General Capacity Limits		Minimum values for general limits.

31.6 Limits on File System Capacity		Size limitations that pertain to individual files. These can vary between file systems or even from file to file.
31.7 Optional Features in File Support		Optional features that some files may support.
31.8 Minimum Values for File System Limits		Minimum values for file limits.
31.9 Using pathconf		Getting the limit values for a particular file.

31.10 Utility Program Capacity Limits		Capacity limits of some POSIX.2 utility programs.
31.11 Minimum Values for Utility Limits		Minimum allowable values of those limits.

31.12 String-Valued Parameters

Getting the default search path.