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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
# ENVINDIR -- Return the name of an environment variable which may be given
# by the value of another environment variable as "@envvar".
procedure envindir (envvar, outstr, maxch)
char envvar[ARB] # possibly indirect env. variable name
char outstr[ARB] # receives value of variable
int maxch
pointer sp, envname
int envfind()
errchk syserrs
begin
call smark (sp)
call salloc (envname, SZ_FNAME, TY_CHAR)
call strcpy (envvar, outstr, maxch)
while (outstr[1] == '@') {
call strcpy (outstr[2], Memc[envname], SZ_FNAME)
if (envfind (Memc[envname], outstr, maxch) <= 0)
call syserrs (SYS_ENVNF, Memc[envname])
}
call sfree (sp)
end
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