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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include "oif.h"
# OIF_ACCESS -- Test the accessibility or existence of an existing image, or
# the legality of the name of a new image.
procedure oif_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 status
pointer sp, fname
int btoi(), access(), iki_validextn()
string oif_extn OIF_HDREXTN
bool strne()
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.
if (acmode == NEW_IMAGE || acmode == NEW_COPY) {
status = btoi (iki_validextn (kernel, extn) > 0)
call sfree (sp)
return
}
# Reject image if an invalid extension is given.
if (extn[1] != EOS && strne (extn, oif_extn)) {
status = NO
call sfree (sp)
return
}
# Check for the imagefile.
call iki_mkfname (root, oif_extn, Memc[fname], SZ_PATHNAME)
if (access (Memc[fname], acmode, 0) == YES) {
if (extn[1] == EOS)
call strcpy (oif_extn, extn, MAX_LENEXTN)
status = YES
} else
status = NO
call sfree (sp)
end
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