pa

来自「Algorithms for Image Processing and Comp」· 代码 · 共 55 行

@c ----------------------------------------------------------------------
@node pathconf, posix
@heading @code{pathconf}
@subheading Syntax

@example
#include <unistd.h>

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

@subheading Description

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

@table @code

@item _PC_LINK_MAX

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

@item _PC_MAX_CANON

The maximum number of bytes in an editable input line.

@item _PC_MAX_INPUT

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

@item _PC_NAME_MAX

The maximum length of an individual file name.

@item _PC_PATH_MAX

The maximum length of a complete path name.

@item _PC_PIPE_BUF

The size of a pipe's internal buffer.

@end table

@subheading Return Value

The selected configuration value is returned.

@subheading Example

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