int
rmtstatus(struct mtget *mt)
{
char *buf = (char *)mt;
int n, i, cc;
if (rmtversion > 0)
return (rmtstatus_extended(mt));
n = rmtcall("status", "S");
if (n < 0) {
return (-1);
}
if ((unsigned)n > sizeof (*mt)) {
print(dgettext(domainname,
"rmtstatus: expected response size %d, got %d\n"),
sizeof (struct mtget), n);
print(dgettext(domainname,
"This means the remote rmt daemon is not compatible.\n"));
rmtconnaborted(0);
}
i = 0;
while (i < n) {
cc = read(rmtape, buf+i, n - i);
if (cc <= 0)
rmtconnaborted(0);
i += cc;
}
return (n);
}
int
rmtread(char *buf, uint_t count)
{
char line[30];
int n, i, cc;
(void) snprintf(line, sizeof (line), "R%d\n", count);
n = rmtcall("read", line);
if (n < 0) {
return (-1);
}
if (n > count) {
print(dgettext(domainname,
"rmtread: expected response size %d, got %d\n"),
count, n);
print(dgettext(domainname,
"This means the remote rmt daemon is not compatible.\n"));
rmtconnaborted(0);
}
i = 0;
while (i < n) {
cc = read(rmtape, buf+i, n - i);
if (cc <= 0)
rmtconnaborted(0);
i += cc;
}
return (n);
}
static int
rmtreply(char *cmd)
{
char code[30], emsg[BUFSIZ];
rmtgets(code, sizeof (code));
if (*code == 'E' || *code == 'F') {
rmtgets(emsg, sizeof (emsg));
/*
* don't print error message for ioctl or status;
* or if we are opening up a full path (i.e. device)
* and the tape is not loaded (EIO error)
*/
if (strcmp(cmd, "ioctl") != 0 &&
strcmp(cmd, "status") != 0 &&
!(cmd[0] == '/' && atoi(code + 1) == EIO))
print("%s: %s\n", cmd, emsg);
errno = atoi(code + 1);
if (*code == 'F') {
rmtstate = TS_CLOSED;
return (-1);
}
return (-1);
}
if (*code != 'A') {
print(dgettext(domainname,
"Protocol to remote tape server botched (code %s?).\n"),
code);
rmtconnaborted(0);
}
return (atoi(code + 1));
}
static int
rmtcall(char *cmd, char *buf)
{
if (rmtpush(buf, strlen(buf)) != strlen(buf))
rmtconnaborted(0);
return (rmtreply(cmd));
}
static int
rmtreply(const char *cmd)
{
char *cp;
char code[30], emsg[BUFSIZ];
rmtgets(code, sizeof (code));
if (*code == 'E' || *code == 'F') {
rmtgets(emsg, sizeof (emsg));
msg("%s: %s", cmd, emsg);
errno = atoi(code + 1);
if (*code == 'F')
rmtstate = TS_CLOSED;
return (-1);
}
if (*code != 'A') {
/* Kill trailing newline */
cp = code + strlen(code);
if (cp > code && *--cp == '\n')
*cp = '\0';
msg("Protocol to remote tape server botched (code \"%s\").\n",
code);
rmtconnaborted(0);
}
return (atoi(code + 1));
}
static int
rmtcall(const char *cmd, const char *buf)
{
if (write(rmtape, buf, strlen(buf)) != strlen(buf))
rmtconnaborted(0);
return (rmtreply(cmd));
}
int
rmtgetb(void)
{
char c;
if (read(rmtape, &c, 1) != 1)
rmtconnaborted(0);
return (c);
}
static int
rmtcall(const char *cmd, const char *buf)
{
ssize_t len = (ssize_t)strlen(buf);
if (write(rmtape, buf, len) != len)
rmtconnaborted(0);
return (rmtreply(cmd));
}
static void
rmtgets(char *cp, int len)
{
int i, n;
n = recv(rmtape, cp, len-1, MSG_PEEK);
for (i = 0; i < n; i++)
if (cp[i] == '\n')
break;
n = i + 1; /* characters to read at once */
for (i = 0; i < len; i += n, n = 1) {
n = read(rmtape, cp, n);
if (n <= 0)
rmtconnaborted(0);
cp += n;
if (cp[-1] == '\n') {
cp[-1] = '\0';
return;
}
}
print(dgettext(domainname,
"Protocol to remote tape server botched (in rmtgets).\n"));
rmtconnaborted(0);
}
int
rmtread(char *buf, int count)
{
char line[30];
int n, i, cc;
(void)snprintf(line, sizeof (line), "R%d\n", count);
n = rmtcall("read", line);
if (n < 0)
/* rmtcall() properly sets errno for us on errors. */
return (n);
for (i = 0; i < n; i += cc) {
cc = read(rmtape, buf+i, n - i);
if (cc <= 0)
rmtconnaborted(0);
}
return (n);
}
/* Get a line (guaranteed to have a trailing newline). */
void
rmtgets(char *line, int len)
{
char *cp = line;
while (len > 1) {
*cp = rmtgetb();
if (*cp == '\n') {
cp[1] = '\0';
return;
}
cp++;
len--;
}
*cp = '\0';
msg("Protocol to remote tape server botched.\n");
msg("(rmtgets got \"%s\").\n", line);
rmtconnaborted(0);
}
int
rmtread(char *buf, int count)
{
char line[30];
int n, i, cc;
(void)snprintf(line, sizeof(line), "R%d\n", count);
n = rmtcall("read", line);
if (n < 0) {
errno = n;
return (-1);
}
for (i = 0; i < n; i += cc) {
cc = read(rmtape, buf+i, n - i);
if (cc <= 0) {
rmtconnaborted(0);
}
}
return (n);
}
