unistd.h

pathconf(3)						     Library Functions Manual						       pathconf(3)

Name
       pathconf, fpathconf - get configurable pathname variables (POSIX)

Syntax
       #include <unistd.h>

       long pathconf(path, name)
       char *path;
       int name;

       long fpathconf(fildes, name)
       int fildes, name;

Description
       The  and functions provide a method for the application to determine the current value of a configurable limit or option that is associated
       with a file or directory.

       For the path argument points to the pathname of a file or directory. For the fildes argument is an open file descriptor.

       The name argument represents the variable to be queried relative to that file or directory. The following table lists the  variables  which
       may  be	queried  and  the corresponding value for the name argument. The values for the name argument are defined in the <unistd.h> header
       file.
       Variable 		   name Value

       LINK_MAX 		   _PC_LINK_MAX
       MAX_CANON		   _PC_MAX_CANON
       MAX_INPUT		   _PC_MAX_INPUT
       NAME_MAX 		   _PC_NAME_MAX
       PATH_MAX 		   _PC_PATH_MAX
       PIPE_BUF 		   _PC_PIPE_BUF
       _POSIX_CHOWN_RESTRICTED	   _PC_CHOWN_RESTRICTED
       _POSIX_NO_TRUNC		   _PC_NO_TRUNC
       _POSIX_VDISABLE		   _PC_VDISABLE

Return Values
       Upon successful completion, the and functions return the current variable value for the file or directory.

       If name is an invalid value, and return -1 and errno is set to indicate the reason. If the variable corresponding to name is not defined on
       the system, and return -1 without changing the value of errno.

Diagnostics
       The and functions fail if the following occurs:

       [EINVAL]       The value of the name argument is invalid.

See Also
       <unistd.h>

																       pathconf(3)