pathconf

Syntax

#include <unistd.h>

long pathconf(const char *filename, int name);

Description

This function returns various system-dependent configuration values. The name is one of the following:

_PC_LINK_MAX

The maximum number of directory entries that can refer to a single real file.

_PC_MAX_CANON

The maximum number of bytes in an editable input line.

_PC_MAX_INPUT

The maximum number of bytes in a non-editable input line.

_PC_NAME_MAX

The maximum length of an individual file name.

_PC_PATH_MAX

The maximum length of a complete path name.

_PC_PIPE_BUF

The size of a pipe's internal buffer.

_PC_CHOWN_RESTRICTED

If non-zero, only privileged user can chown() files, otherwise anyone may give away files.

_PC_NO_TRUNC

If false filenames longer than _PC_NAME_MAX are truncated, otherwise an error occurs if you use longer names.

_PC_VDISABLE

A character to use to disable tty special characters.

Return Value

The selected configuration value is returned.

Example

char *buf = malloc(pathconf("c:/", _PC_MAX_PATH)+1);

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