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).