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.

SEE ALSO

       getuduser(3).