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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <config.h>
include <fio.h>
include "ki.h"
# KZOPMT -- Open a magtape file.
procedure kzopmt (device, mode, devcap, devpos, newfile, chan)
char device[ARB] #I logical device name
int mode #I access mode
char devcap[ARB] #I tapecap entry for device
int devpos[ARB] #I tape position information
int newfile #U receives new file number
int chan #O channel assigned for reading filenames
pointer sp, bp, bd
int server, dv_len, dc_len, dc_off
int ki_connect(), ki_send(), ki_receive(), ki_getchan()
int kmalloc(), strlen()
include "kichan.com"
include "kii.com"
begin
server = ki_connect (device)
# We must preallocate a channel descriptor in order for error
# recovery to work, if an abort occurs during the zzopmt.
chan = ki_getchan (server, chan)
if (server == NULL) {
call strpak (p_sbuf[p_arg[1]], p_sbuf, SZ_SBUF)
call zzopmt (p_sbuf, mode, devcap, devpos, newfile, k_oschan[chan])
} else {
call smark (sp)
call salloc (bp, SZ_COMMAND, TY_CHAR)
# Determine whether devcap string will fit in sbuf.
call strupk (devcap, Memc[bp], SZ_COMMAND)
dv_len = strlen (p_sbuf[p_arg[1]])
dc_len = strlen (Memc[bp])
if (p_arg[1] + dv_len+1 + dc_len > SZ_SBUF)
dc_off = 0
else {
dc_off = p_arg[1] + dv_len + 1
call strcpy (Memc[bp], p_sbuf[dc_off], ARB)
p_sbuflen = dc_off + dc_len
}
# Prepare the arguments.
p_arg[2] = mode
p_arg[3] = dc_off
p_arg[4] = dc_len
p_arg[5] = newfile
call amovi (devpos, p_arg[6], LEN_MTDEVPOS)
if (ki_send (server, KI_ZFIOMT, MT_OP) == ERR)
k_oschan[chan] = ERR
else if (dc_len > 0 && dc_off == 0) {
call ks_awrite (server, devcap, dc_len+1)
call ks_await (server, k_oschan[chan])
}
if (ki_receive (server, KI_ZFIOMT, MT_OP) == ERR)
k_oschan[chan] = ERR
else {
k_oschan[chan] = p_arg[1]
newfile = p_arg[2]
}
call sfree (sp)
}
if (k_oschan[chan] == ERR) {
call ki_freechan (chan)
chan = ERR
} else {
if (server != NULL) {
if (kmalloc (bd, LEN_MTDEVPOS, TY_INT) == ERR) {
call ki_freechan (chan)
chan = ERR
} else
k_bufp[chan] = bd
}
}
end
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