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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
include "iki.h"
# IKI_COPY -- Fast copy of an entire image or group of images. This function
# is provided at the IKI level since the kernel has explicit knowledge of the
# storage format and hence may be able to copy the image by means much simpler
# and faster way than those available to the high level software.
procedure iki_copy (old, new)
char old[ARB] #I name of old image
char new[ARB] #I name of new image
int k, n, status
pointer sp, old_root, old_extn, new_root, new_extn
int iki_access()
bool streq()
errchk syserrs
include "iki.com"
begin
call smark (sp)
call salloc (old_root, SZ_PATHNAME, TY_CHAR)
call salloc (old_extn, MAX_LENEXTN, TY_CHAR)
call salloc (new_root, SZ_PATHNAME, TY_CHAR)
call salloc (new_extn, MAX_LENEXTN, TY_CHAR)
# Verify that the old image exists and determine its type.
k = iki_access (old, Memc[old_root], Memc[old_extn], READ_ONLY)
if (k < 0)
call syserrs (SYS_IKIAMBIG, old)
else if (k == 0)
call syserrs (SYS_IKIIMNF, old)
# Make sure we will not be clobbering an existing image. Ignore
# attempts to rename an image onto itself.
n = iki_access (new, Memc[new_root], Memc[new_extn], 0)
if (n > 0) {
if (streq (Memc[old_root], Memc[new_root]))
if (streq (Memc[old_extn], Memc[new_extn])) {
call sfree (sp)
return
}
call syserrs (SYS_IKICLOB, new)
} else {
# New name is new root plus legal extn for old image.
call iki_parse (new, Memc[new_root], Memc[new_extn])
call strcpy (Memc[old_extn], Memc[new_extn], MAX_LENEXTN)
}
# Copy the image.
call zcall6 (IKI_COPY(k), k, Memc[old_root], Memc[old_extn],
Memc[new_root], Memc[new_extn], status)
if (status == ERR)
call syserrs (SYS_IKICOPY, old)
call sfree (sp)
end
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