int activate_remotes(struct set *ss, struct katcl_line *k)
{
unsigned int i;
struct remote *rx;
int fd;
#ifdef DEBUG
fprintf(stderr, "launching %u clients\n", ss->s_count);
#endif
for(i = 0; i < ss->s_count; i++){
rx = ss->s_vector[i];
#ifdef DEBUG
fprintf(stderr, "attempting to start connect to %s (%u requests)\n", rx->r_name, rx->r_count);
#endif
fd = net_connect(rx->r_name, 0, NETC_ASYNC);
if(fd < 0){
if(k){
/* TODO */
}
return -1;
}
if(rx->r_line){
#ifdef DEBUG
fprintf(stderr, "logic failure: line already initialised\n");
#endif
return -1;
}
rx->r_line = create_katcl(fd);
if(rx->r_line == NULL){
if(k){
/* TODO */
}
#ifdef DEBUG
fprintf(stderr, "setup failure: unable to create line for %s\n", rx->r_name);
#endif
close(fd);
return -1;
}
rx->r_state = RX_SETUP;
rx->r_index = 0;
}
return 0;
}
struct state *create_state(int fd)
{
struct state *s;
s = malloc(sizeof(struct state));
if(s == NULL){
return NULL;
}
s->s_vector = NULL;
s->s_count = 0;
s->s_finished = 0;
s->s_code = 0;
s->s_up = create_katcl(fd);
if(s->s_up == NULL){
destroy_state(s);
return NULL;
}
return s;
}
int main(int argc, char **argv)
{
struct set *ss;
struct remote *rx;
struct katcl_parse *px;
struct katcl_line *k;
struct timeval delta, start, stop;
fd_set fsr, fsw;
char *app, *parm, *cmd, *copy, *ptr, *servers, *extra, *label;
int i, j, c, fd, mfd, count;
int verbose, result, status, info, timeout, flags, show, munge, once;
int xmit, code;
unsigned int len;
servers = getenv("KATCP_SERVER");
if(servers == NULL){
servers = "localhost:7147";
}
once = 1;
munge = 0;
info = 1;
verbose = 1;
i = j = 1;
app = argv[0];
timeout = 0;
k = NULL;
show = 1;
parm = NULL;
extra = NULL;
label = KCPPAR_NAME;
count = 0;
px = NULL;
k = create_katcl(STDOUT_FILENO);
if(k == NULL){
fprintf(stderr, "%s: unable to create katcp message logic\n", app);
return 4;
}
ss = create_set();
if(ss == NULL){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to set up command set data structures");
return 4;
}
xmit = (-1);
while (i < argc) {
if (argv[i][0] == '-') {
c = argv[i][j];
switch (c) {
case 'h' :
usage(app);
return 0;
case 'i' :
info = 1 - info;
j++;
break;
case 'm' :
munge = 1;
j++;
break;
case 'n' :
show = 0;
j++;
break;
case 'q' :
verbose = 0;
j++;
break;
case 'x' :
xmit = 0;
j++;
break;
case 'l' :
case 's' :
case 't' :
j++;
if (argv[i][j] == '\0') {
j = 0;
i++;
}
if (i >= argc) {
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "argument needs a parameter");
return 2;
}
switch(c){
case 'l' :
label = argv[i] + j;
break;
case 's' :
servers = argv[i] + j;
break;
case 't' :
timeout = atoi(argv[i] + j);
break;
}
i++;
j = 1;
break;
case 'v' :
verbose++;
j++;
break;
case '-' :
j++;
break;
case '\0':
j = 1;
i++;
break;
default:
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unknown option -%c", argv[i][j]);
return 2;
}
} else {
copy = NULL;
if(xmit < 0){
/* WARNING: this could make error detection worse */
xmit = 0;
}
if(xmit == 0){
px = create_referenced_parse_katcl();
if(px == NULL){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to create parse instance for <%s ...>", argv[i]);
return 4;
}
switch(argv[i][0]){
case KATCP_REQUEST :
case KATCP_REPLY :
case KATCP_INFORM :
ptr = argv[i];
break;
default :
copy = malloc(strlen(argv[i]) + 1);
if(copy == NULL){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to allocate temporary storage for %s", argv[i]);
return 4;
}
copy[0] = KATCP_REQUEST;
strcpy(copy + 1, argv[i]);
ptr = copy;
break;
}
flags = KATCP_FLAG_FIRST;
} else {
ptr = argv[i];
flags = 0;
}
i++;
j = 1;
if((i >= argc) || (argv[i][0] == '-')){
flags |= KATCP_FLAG_LAST;
}
if(add_string_parse_katcl(px, flags, ptr) < 0){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to add parameter %s", ptr);
return 4;
}
if(flags & KATCP_FLAG_LAST){
#ifdef DEBUG
fprintf(stderr, "par: loading command for servers %s\n", servers);
#endif
if(load_parse_set(ss, servers, px) < 0){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to load command into server set %s", servers);
return 4;
}
destroy_parse_katcl(px);
px = NULL;
}
if(copy){
free(copy);
copy = NULL;
}
xmit++;
}
}
if(timeout == 0){
timeout = 5000 * ss->s_count;
}
gettimeofday(&start, NULL);
delta.tv_sec = timeout / 1000;
delta.tv_usec = (timeout % 1000) * 1000;
add_time_katcp(&stop, &start, &delta);
if(activate_remotes(ss, k) < 0){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to initiate connections to remote servers");
return 3;
}
for(ss->s_finished = 0; ss->s_finished < ss->s_count;){
mfd = 0;
FD_ZERO(&fsr);
FD_ZERO(&fsw);
if(k){
if(flushing_katcl(k)){
mfd = fileno_katcl(k);
FD_SET(mfd, &fsw);
}
}
for(i = 0; i < ss->s_count; i++){
rx = ss->s_vector[i];
if(rx->r_line){
fd = fileno_katcl(rx->r_line);
if(fd > mfd){
mfd = fd;
}
} else {
fd = (-1); /* WARNING: live dangerously */
}
switch(rx->r_state){
case RX_SETUP :
FD_SET(fd, &fsw);
break;
case RX_UP :
if(flushing_katcl(rx->r_line)){ /* only write data if we have some */
FD_SET(fd, &fsw);
}
FD_SET(fd, &fsr);
break;
/* case RX_OK : */
/* case RX_FAIL : */
/* case RX_BAD : */
default :
break;
}
}
gettimeofday(&start, NULL);
sub_time_katcp(&delta, &stop, &start);
result = select(mfd + 1, &fsr, &fsw, NULL, &delta);
switch(result){
case -1 :
switch(errno){
case EAGAIN :
case EINTR :
continue; /* WARNING */
default :
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "select failed: %s", strerror(errno));
return 4;
}
break;
case 0 :
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "requests timed out after %dms", timeout);
/* could terminate cleanly here, but ... */
return 3;
}
if(k){
fd = fileno_katcl(k);
if(FD_ISSET(fd, &fsw)){
write_katcl(k); /* WARNING: ignores write failures - unable to do much about it */
}
}
for(i = 0; i < ss->s_count; i++){
rx = ss->s_vector[i];
if(rx->r_line){
fd = fileno_katcl(rx->r_line);
} else {
fd = (-1); /* WARNING: live dangerously, will cause select to core dump if logic is incorrect */
}
switch(rx->r_state){
case RX_SETUP :
if(FD_ISSET(fd, &fsw)){
len = sizeof(int);
result = getsockopt(fd, SOL_SOCKET, SO_ERROR, &code, &len);
if(result == 0){
switch(code){
case 0 :
if(verbose){
log_message_katcl(k, KATCP_LEVEL_DEBUG, label, "async connect to %s succeeded", rx->r_name);
}
if(next_request(rx) < 0){
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "failed to load request for destination %s", rx->r_name);
update_state(ss, rx, RX_BAD);
} else {
update_state(ss, rx, RX_UP);
}
break;
case EINPROGRESS :
log_message_katcl(k, KATCP_LEVEL_WARN, label, "saw an in progress despite write set being ready on job %s", rx->r_name);
break;
default :
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to connect to %s: %s", rx->r_name, strerror(code));
update_state(ss, rx, RX_BAD);
break;
}
}
}
break;
case RX_UP :
if(FD_ISSET(fd, &fsw)){ /* flushing things */
result = write_katcl(rx->r_line);
if(result < 0){
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to write to %s: %s", rx->r_name, strerror(error_katcl(rx->r_line)));
update_state(ss, rx, RX_BAD);
}
}
if(FD_ISSET(fd, &fsr)){ /* get things */
result = read_katcl(rx->r_line);
if(result){
if(result < 0){
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "read from %s failed: %s", rx->r_name, strerror(error_katcl(rx->r_line)));
} else {
log_message_katcl(k, KATCP_LEVEL_WARN, label, "%s disconnected", rx->r_name);
}
}
}
while(have_katcl(rx->r_line) > 0){ /* compute */
cmd = arg_string_katcl(rx->r_line, 0);
if(cmd){
#ifdef DEBUG
fprintf(stderr, "reading message <%s ...>\n", cmd);
#endif
switch(cmd[0]){
case KATCP_INFORM :
if(info){
if(show == 0){
if(!strcmp(KATCP_VERSION_CONNECT_INFORM, cmd)){
break;
}
if(!strcmp(KATCP_VERSION_INFORM, cmd)){
break;
}
if(!strcmp(KATCP_BUILD_STATE_INFORM, cmd)){
break;
}
}
relay_katcl(rx->r_line, k);
}
break;
case KATCP_REPLY :
switch(cmd[1]){
case ' ' :
case '\n' :
case '\r' :
case '\t' :
case '\\' :
case '\0' :
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "unreasonable response message from %s", rx->r_name);
update_state(ss, rx, RX_BAD);
break;
default :
ptr = cmd + 1;
if(strcmp(ptr, rx->r_match)){
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "downstream %s returned response %s which was never requested", rx->r_name, ptr);
update_state(ss, rx, RX_BAD);
} else {
parm = arg_string_katcl(rx->r_line, 1);
if(parm){
if(strcmp(parm, KATCP_OK) == 0){
count++;
if(munge){
log_message_katcl(k, KATCP_LEVEL_INFO, label, "%s %s ok", rx->r_name, ptr);
}
if(verbose > 1){
log_message_katcl(k, KATCP_LEVEL_TRACE, label, "request %s to %s returned ok", ptr, rx->r_name);
}
result = next_request(rx);
if(result){
if(result < 0){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "unable to queue request %s to %s", ptr, rx->r_name);
update_state(ss, rx, RX_BAD);
} else {
update_state(ss, rx, RX_OK);
}
}
} else {
if(munge){
extra = arg_string_katcl(rx->r_line, 2);
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "%s %s %s (%s)", rx->r_name, ptr, parm, extra ? extra : "no extra information");
}
if(verbose > 0){
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "downstream %s unable to process %s with status %s (%s)", rx->r_name, cmd, parm, extra ? extra : "no extra information");
}
update_state(ss, rx, RX_FAIL);
}
} else {
log_message_katcl(k, KATCP_LEVEL_ERROR, label, "response %s without status from %s", cmd, rx->r_name);
update_state(ss, rx, RX_FAIL);
}
}
break;
}
break;
case KATCP_REQUEST :
log_message_katcl(k, KATCP_LEVEL_WARN, label, "encountered unanswerable request %s", cmd);
update_state(ss, rx, RX_BAD);
break;
default :
if(once){
log_message_katcl(k, KATCP_LEVEL_WARN, label, "read malformed message %s from %s", cmd, rx->r_name);
once = 1;
}
break;
}
}
}
break;
/* case RX_OK : */
/* case RX_FAIL : */
/* case RX_BAD : */
default :
break;
}
}
}
status = ss->s_status;
destroy_set(ss);
if(verbose){
if(status > 0){
log_message_katcl(k, KATCP_LEVEL_WARN, label, "command sequence failed after operation %d", count);
} else {
if(count > 0){
log_message_katcl(k, KATCP_LEVEL_INFO, label, "%d operations ok", count);
} else {
log_message_katcl(k, KATCP_LEVEL_INFO, label, "did nothing successfully");
}
}
}
/* flush, allows us to get away with deferring writes to stdout */
while(write_katcl(k) == 0);
destroy_katcl(k, 0);
return status;
}
int main()
{
struct katcl_line *l;
struct katcl_parse *p;
int count, seed, i, k, fds[2], result, al, bl;
char alpha[MAX_ARG_LEN], beta[MAX_ARG_LEN];
pid_t pid;
seed = getpid();
printf("line test: seed is %d\n", seed);
srand(seed);
if(socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0){
fprintf(stderr, "line: unable to create socketpair\n");
return 1;
}
pid = fork();
if(pid < 0){
fprintf(stderr, "line: unable to fork\n");
return 1;
}
if(pid == 0){
close(fds[0]);
echobuffer(fds[1]);
return 0;
}
close(fds[1]);
l = create_katcl(fds[0]);
if(l == NULL){
fprintf(stderr, "main: unable to create katcl\n");
return 1;
}
for(i = 0; i < TEST_RUNS; i++){
#ifdef DEBUG
fprintf(stderr, "line test: iteration %d\n", i);
#endif
p = create_referenced_parse_katcl();
if(p == NULL){
fprintf(stderr, "unable to create parse instance %d\n", i);
return 1;
}
#ifdef DEBUG
fprintf(stderr, "test: ref before submission %d\n", p->p_refs);
#endif
fill_random_test(p);
dump_parse_katcl(p, "random", stderr);
if(append_parse_katcl(l, p) < 0){
fprintf(stderr, "unable to add parse %d\n", i);
return 1;
}
#ifdef DEBUG
fprintf(stderr, "test: ref after submission %d\n", p->p_refs);
#endif
while((result = write_katcl(l)) == 0);
#ifdef DEBUG
fprintf(stderr, "test: ref after write %d\n", p->p_refs);
#endif
if(result < 0){
fprintf(stderr, "unable to write data\n");
return 1;
}
do{
result = read_katcl(l);
if(result){
fprintf(stderr, "read result is %d\n", result);
return 1;
}
} while(have_katcl(l) == 0);
count = arg_count_katcl(l);
for(k = 0; k < count; k++){
al = arg_buffer_katcl(l, k, alpha, MAX_ARG_LEN);
bl = get_buffer_parse_katcl(p, k, beta, MAX_ARG_LEN);
if((bl < 0) || (al < 0)){
fprintf(stderr, "al=%d, bl=%d\n", al, bl);
return 1;
}
if(al != bl){
fprintf(stderr, "al=%d != bl=%d\n", al, bl);
return 1;
}
if(memcmp(alpha, beta, al)){
fprintf(stderr, "mismatch: round=%d, arg=%d\n", i, k);
return 1;
}
}
fprintf(stderr, "parsed a line with %d words\n", count);
destroy_parse_katcl(p);
}
destroy_katcl(l, 1);
printf("line test: ok\n");
return 0;
}
int main(int argc, char **argv)
{
char *app, *server, *match, *parm, *tmp, *cmd, *extra;
int i, j, c, fd;
int verbose, result, status, base, run, info, reply, display, max, prefix, timeout, fmt, pos, flags, munge, show;
struct katcl_line *l, *k;
fd_set fsr, fsw;
struct timeval tv;
server = getenv("KATCP_SERVER");
if(server == NULL){
server = "localhost";
}
info = 1;
reply = 1;
verbose = 1;
i = j = 1;
app = argv[0];
base = (-1);
timeout = 5;
fmt = FMT_TEXT;
pos = (-1);
k = NULL;
munge = 0;
show = 1;
while (i < argc) {
if (argv[i][0] == '-') {
c = argv[i][j];
switch (c) {
case 'h' :
usage(app);
return 0;
case 'v' :
verbose++;
j++;
break;
case 'q' :
verbose = 0;
info = 0;
reply = 0;
j++;
break;
case 'i' :
info = 1 - info;
j++;
break;
case 'r' :
reply = 1 - reply;
j++;
break;
case 'n' :
show = 0;
j++;
break;
case 'k' :
k = create_katcl(STDOUT_FILENO);
if(k == NULL){
fprintf(stderr, "%s: unable to create katcp message logic\n", app);
return 2;
}
j++;
break;
case 'a' :
fmt = FMT_AUTO;
j++;
break;
case 'x' :
fmt = FMT_HEX;
j++;
break;
case 'b' :
fmt = FMT_BIN;
j++;
break;
case 'm' :
munge = 1;
j++;
break;
case 's' :
case 't' :
case 'p' :
j++;
if (argv[i][j] == '\0') {
j = 0;
i++;
}
if (i >= argc) {
fprintf(stderr, "%s: argument needs a parameter\n", app);
return 2;
}
switch(c){
case 's' :
server = argv[i] + j;
break;
case 't' :
timeout = atoi(argv[i] + j);
break;
case 'p' :
pos = atoi(argv[i] + j);
if(pos < 0){
fprintf(stderr, "%s: position needs to be nonnegative, not %d\n", app, pos);
return 2;
}
break;
}
i++;
j = 1;
break;
case '-' :
j++;
break;
case '\0':
j = 1;
i++;
break;
default:
fprintf(stderr, "%s: unknown option -%c\n", app, argv[i][j]);
return 2;
}
} else {
base = i;
i = argc;
}
}
if(munge){
if(k){
reply = 1;
}
}
if(base < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "no command given");
}
fprintf(stderr, "%s: need a command to send (use -h for help)\n", app);
return 2;
}
status = 1;
flags = 0;
if(verbose > 0){
flags = NETC_VERBOSE_ERRORS;
if(verbose > 1){
flags = NETC_VERBOSE_STATS;
}
}
fd = net_connect(server, 0, flags);
if(fd < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "unable to connect to %s", server);
}
return 2;
}
l = create_katcl(fd);
if(l == NULL){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "unable to create katcp parser");
}
fprintf(stderr, "%s: unable to create katcp parser\n", app);
return 2;
}
i = base;
match = NULL;
flags = ((i + 1) < argc) ? KATCP_FLAG_FIRST : (KATCP_FLAG_FIRST | KATCP_FLAG_LAST);
switch(argv[i][0]){
case KATCP_REQUEST :
match = argv[i] + 1;
/* FALL */
case KATCP_INFORM :
case KATCP_REPLY :
append_string_katcl(l, flags, argv[i]);
break;
default :
match = argv[i];
append_args_katcl(l, flags, "%c%s", KATCP_REQUEST, argv[i]);
break;
}
i++;
while(i < argc){
tmp = argv[i];
i++;
flags = (i < argc) ? 0 : KATCP_FLAG_LAST;
if(load_arg(l, tmp, fmt, flags) < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "unable to load argument %d", i);
}
fprintf(stderr, "%s: unable to load argument %d\n", app, i);
return 2;
}
}
if(match){
for(prefix = 0; (match[prefix] != '\0') && (match[prefix] != ' '); prefix++);
#ifdef DEBUG
fprintf(stderr, "debug: checking prefix %d of %s\n", prefix, match);
#endif
} else {
prefix = 0; /* pacify -Wall, prefix only used if match is set */
}
/* WARNING: logic a bit intricate */
for(run = 1; run;){
FD_ZERO(&fsr);
FD_ZERO(&fsw);
if(match){ /* only look for data if we need it */
FD_SET(fd, &fsr);
}
if(flushing_katcl(l)){ /* only write data if we have some */
FD_SET(fd, &fsw);
}
tv.tv_sec = timeout;
tv.tv_usec = 0;
result = select(fd + 1, &fsr, &fsw, NULL, &tv);
switch(result){
case -1 :
switch(errno){
case EAGAIN :
case EINTR :
continue; /* WARNING */
default :
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "select failed: %s", strerror(errno));
}
return 2;
}
break;
case 0 :
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "request timed out after %d seconds", timeout);
}
if(verbose){
fprintf(stderr, "%s: no io activity within %d seconds\n", app, timeout);
}
/* could terminate cleanly here, but ... */
return 2;
}
if(FD_ISSET(fd, &fsw)){
result = write_katcl(l);
if(result < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "write failed: %s", strerror(errno));
}
fprintf(stderr, "%s: write failed: %s\n", app, strerror(error_katcl(l)));
return 2;
}
if((result > 0) && (match == NULL)){ /* if we finished writing and don't expect a match then quit */
run = 0;
}
}
if(FD_ISSET(fd, &fsr)){
result = read_katcl(l);
if(result){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCMD_NAME, "read failed: %s", (result < 0) ? strerror(error_katcl(l)) : "connection terminated");
}
fprintf(stderr, "%s: read failed: %s\n", app, (result < 0) ? strerror(error_katcl(l)) : "connection terminated");
return 2;
}
}
while(have_katcl(l) > 0){
cmd = arg_string_katcl(l, 0);
if(cmd){
display = 0;
switch(cmd[0]){
case KATCP_INFORM :
display = info;
if(show == 0){
if(!strcmp(KATCP_VERSION_CONNECT_INFORM, cmd)){
display = 0;
}
}
break;
case KATCP_REPLY :
display = reply;
parm = arg_string_katcl(l, 1);
if(match){
if(strncmp(match, cmd + 1, prefix) || ((cmd[prefix + 1] != '\0') && (cmd[prefix + 1] != ' '))){
if(k){
sync_message_katcl(k, KATCP_LEVEL_WARN, KCPCMD_NAME, "encountered unexpected reply %s", cmd);
}
fprintf(stderr, "%s: warning: encountered unexpected reply <%s>\n", app, cmd);
} else {
if(parm && !strcmp(parm, KATCP_OK)){
status = 0;
}
run = 0;
}
}
break;
case KATCP_REQUEST :
if(k){
sync_message_katcl(k, KATCP_LEVEL_WARN, KCPCMD_NAME, "encountered unanswerable request %s", cmd);
}
fprintf(stderr, "%s: warning: encountered an unanswerable request <%s>\n", app, cmd);
break;
default :
if(k){
sync_message_katcl(k, KATCP_LEVEL_WARN, KCPCMD_NAME, "read malformed message %s", cmd);
}
fprintf(stderr, "%s: read malformed message <%s>\n", app, cmd);
break;
}
if(display){
#ifdef DEBUG
fprintf(stderr, "need to display\n");
#endif
if(k){
if(munge && parm && (cmd[0] == KATCP_REPLY)){
if(!strcmp(parm, KATCP_OK)){
sync_message_katcl(k, KATCP_LEVEL_DEBUG, cmd + 1, KATCP_OK);
} else {
extra = arg_string_katcl(l, 2);
sync_message_katcl(k, KATCP_LEVEL_WARN, cmd + 1, "%s (%s)", parm, extra ? extra : "no extra information");
}
} else {
relay_katcl(l, k);
}
} else {
max = arg_count_katcl(l);
if(pos < 0){
for(i = 0; i < max; i++){
if(print_arg(l, i, fmt) < 0){
fprintf(stderr, "%s: failed to print argument %d\n", app, i);
return 2;
}
fputc(((i + 1) == max) ? '\n' : ' ' , stdout);
}
} else {
if(pos < max){
i = pos;
if(print_arg(l, i, fmt) < 0){
fprintf(stderr, "%s: failed to print argument %d\n", app, i);
return 2;
}
}
}
}
}
}
}
}
destroy_katcl(l, 1);
if(k){
while(write_katcl(k) == 0);
destroy_katcl(k, 0);
}
return status;
}
int main(int argc, char **argv)
{
#define BUFFER 64
char buffer[BUFFER];
char *level, *app, *server, *output;
int run, fd, i, j, c, verbose, attempts, detach, result, truncate, flags;
struct katcl_parse *p;
struct katcl_line *ls, *lo;
struct sigaction sa;
time_t now;
struct tm *local;
i = j = 1;
app = argv[0];
verbose = 0;
attempts = 2;
detach = 0;
truncate = 0;
server = getenv("KATCP_SERVER");
if(server == NULL){
server = "localhost";
}
output = NULL;
level = NULL;
flags = 0; /* placate -Wall */
while (i < argc) {
if (argv[i][0] == '-') {
c = argv[i][j];
switch (c) {
case 'h' :
usage(app);
return EX_OK;
case 'v' :
verbose++;
j++;
break;
case 'd' :
detach = 1;
j++;
break;
case 'f' :
detach = 0;
j++;
break;
case 't' :
truncate = 1;
j++;
break;
case 'q' :
verbose = 0;
j++;
break;
case 'l' :
case 'o' :
case 'a' :
case 's' :
j++;
if (argv[i][j] == '\0') {
j = 0;
i++;
}
if (i >= argc) {
fprintf(stderr, "%s: usage: argument needs a parameter\n", app);
return EX_USAGE;
}
switch(c){
case 'l' :
level = argv[i] + j;
break;
case 'o' :
output = argv[i] + j;
break;
case 'a' :
attempts = atoi(argv[i] + j);
break;
case 's' :
server = argv[i] + j;
break;
}
i++;
j = 1;
break;
case '-' :
j++;
break;
case '\0':
j = 1;
i++;
break;
default:
fprintf(stderr, "%s: usage: unknown option -%c\n", app, argv[i][j]);
return EX_USAGE;
}
} else {
if(output){
fprintf(stderr, "%s: usage: unexpected extra argument %s (can only save to one file)\n", app, argv[i]);
return EX_USAGE;
}
output = argv[i];
i++;
}
}
if(detach){
if(fork_parent() < 0){
fprintf(stderr, "%s: unable to detach process\n", app);
return EX_OSERR;
}
}
sa.sa_handler = handle_signal;
#if 0
sa.sa_flags = SA_RESTART;
#endif
sa.sa_flags = 0;
sigemptyset(&(sa.sa_mask));
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGUSR2, &sa, NULL);
if(server == NULL){
server = "localhost:7147";
}
if(level){
log_changed = 1;
log_level = log_to_code_katcl(level);
if(log_level < 0){
fprintf(stderr, "%s: usage: invalid initial log priority %s\n", app, level);
return EX_USAGE;
}
}
if(output == NULL){
if(detach == 1){
fprintf(stderr, "%s: usage: need a filename as target\n", app);
return EX_USAGE;
}
fd = STDOUT_FILENO;
} else {
flags = O_CREAT | O_WRONLY;
if(truncate == 0){
flags |= O_APPEND;
}
fd = open(output, flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
if(fd < 0){
fprintf(stderr, "%s: unable to open file %s: %s\n", app, output, strerror(errno));
return EX_OSERR;
}
}
lo = create_katcl(fd);
if(lo == NULL){
fprintf(stderr, "%s: unable to allocate log state\n", app);
return EX_OSERR;
}
/**********************/
while((attempts-- > 0) && ((fd = net_connect(server, 0, 0)) < 0)){
sleep(1);
}
if(attempts <= 0){
sync_message_katcl(lo, KATCP_LEVEL_FATAL, NAME, "unable to connect to %s", server);
return EX_UNAVAILABLE;
}
ls = create_katcl(fd);
if(ls == NULL){
sync_message_katcl(lo, KATCP_LEVEL_FATAL, NAME, "unable to allocate parser state");
return EX_OSERR;
}
if(detach){
fclose(stderr);
}
time(&now);
local = localtime(&now);
strftime(buffer, BUFFER - 1, "%Y-%m-%dT%H:%M:%S", local);
sync_message_katcl(lo, KATCP_LEVEL_INFO, NAME, "monitor start for %s at %s", server, buffer);
for(run = 1; run > 0;){
if(log_reload > 0){
if(output){
fd = open(output, flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
if(fd >= 0){
exchange_katcl(lo, fd);
}
}
log_reload = 0;
}
/* WARNING: will only run after the next message - may have to interrupt syscall to get past this */
if(log_changed > 0){
level = log_to_string_katcl(log_level);
if(level){
p = create_parse_katcl();
if(p){
add_string_parse_katcl(p, KATCP_FLAG_STRING | KATCP_FLAG_FIRST, "?log-level");
add_string_parse_katcl(p, KATCP_FLAG_STRING | KATCP_FLAG_LAST, level);
append_parse_katcl(lo, p);
/* dodgy refcount dealings: p is created with refcount = 0, so can only do write at end, otherwise may end up being deallocated */
append_parse_katcl(ls, p);
write_katcl(ls);
}
} else {
sync_message_katcl(lo, KATCP_LEVEL_ERROR, NAME, "invalid log priority number %d", level);
}
log_changed = 0;
}
result = read_katcl(ls);
if(result < 0){
sync_message_katcl(lo, KATCP_LEVEL_FATAL, NAME, "read from network failed: %s", strerror(errno));
return EX_OSERR;
}
if(result == 1){
run = 0;
}
while(have_katcl(ls)){
p = ready_katcl(ls);
if(p){
append_parse_katcl(lo, p);
}
}
write_katcl(lo);
}
return EX_OK;
#undef BUFFER
}
int launch_child(struct state *s, char **vector)
{
int fds[2], fd;
pid_t pid;
struct child **tmp;
struct child *c;
struct katcl_line *k;
unsigned int i;
tmp = realloc(s->s_vector, sizeof(struct child *) * (s->s_count + 1));
if(tmp == NULL){
return -1;
}
s->s_vector = tmp;
c = malloc(sizeof(struct child));
if(c == NULL){
return -1;
}
c->c_pid = 0;
c->c_line = NULL;
c->c_status = 0;
if(socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0){
sync_message_katcl(s->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "unable to allocate socketpair: %s", strerror(errno));
destroy_child(c);
return -1;
}
pid = fork();
if(pid < 0){
sync_message_katcl(s->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "unable to fork: %s", strerror(errno));
close(fds[0]);
close(fds[1]);
destroy_child(c);
return -1;
}
if(pid > 0){
c->c_pid = pid;
close(fds[0]);
fcntl(fds[1], F_SETFD, FD_CLOEXEC);
c->c_line = create_katcl(fds[1]);
if(c->c_line == NULL){
destroy_child(c);
}
s->s_vector[s->s_count] = c;
s->s_count++;
return 0;
}
/* WARNING: can not return from code below, have to exit() */
close(fds[1]);
fd = fds[0];
k = create_katcl(fd);
for(i = STDIN_FILENO; i <= STDERR_FILENO; i++){
if(fd != i){
if(dup2(fd, i) < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCON_NAME, "unable to duplicate fd %d to replace %d: %s", fd, i, strerror(errno));
}
exit(1);
}
}
}
execvp(vector[0], vector);
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, KCPCON_NAME, "unable to run %s: %s", vector[0], strerror(errno));
}
exit(1);
return -1;
}
