getudprefix (3)

const char *getudprefix(void);

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.

UDPREFIX

Contains the pathname of the root of the installed, Unidata software.

UDHOME

Contains the pathname of the home directory of the Unidata user.

getuduser(3).