getudprefix(3)

return installation prefix of Unidata software

Section 3 libxgks-dev bookworm source

Description

GETUDPREFIX

NAME

getudprefix - return installation prefix of Unidata software

SYNOPSIS

const char *getudprefix(void);

DESCRIPTION

This function returns the pathname of the directory off of which most Unidata-supported software is installed. Thus, it may be used during program execution to help form needed pathnames. For example:

#include <string.h>

	extern const char		*getudprefix(void);
	char		pathbuf[256];

...

	(void)strcat(strcpy(pathbuf, getudprefix()),

		"/etc/udunits.dat");

The function returns the value of the environment variable UDPREFIX, if it exists; otherwise, the value of the environment variable UDHOME is returned, if it exists; otherwise, the home directory of the user database entry returned by ‘getuduser()’ is used, if it exists; otherwise, the empty string ("") is returned.

ENVIRONMENT

	UDPREFIX		Contains the pathname of the root of the installed, Unidata software.
	UDHOME		Contains the pathname of the home directory of the Unidata user.