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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include "plf.h"
# PLF_ACCESS -- Test the accessibility or existence of an existing image,
# or the legality of the name of a new image.
procedure plf_access (kernel, root, extn, acmode, status)
int kernel #I IKI kernel
char root[ARB] #I root filename
char extn[ARB] #U extension (SET on output if none specified)
int acmode #I access mode (0 to test only existence)
int status #O ok or err
pointer sp, fname
int btoi(), access(), iki_validextn()
string plf_extn PLF_EXTN
begin
call smark (sp)
call salloc (fname, SZ_PATHNAME, TY_CHAR)
# If new image, test only the legality of the given extension.
# This is used to select a kernel given the imagefile extension.
status = NO
if (extn[1] != EOS)
status = btoi (iki_validextn (kernel, extn) > 0)
if (acmode != NEW_IMAGE && acmode != NEW_COPY) {
if (extn[1] == EOS) {
call iki_mkfname (root, plf_extn, Memc[fname], SZ_PATHNAME)
status = access (Memc[fname], acmode, 0)
if (status != NO)
call strcpy (plf_extn, extn, MAX_LENEXTN)
} else if (status != NO) {
call iki_mkfname (root, extn, Memc[fname], SZ_PATHNAME)
status = access (Memc[fname], acmode, 0)
}
}
call sfree (sp)
end
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