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 main(int argc, char **argv)
{
char *app, *server, *match, *parm, *tmp, *cmd, *extra, *label;
int i, j, c, fd;
int verbose, result, status, base, run, info, reply, display, max, prefix, timeout, fmt, pos, flags, munge, show, firm;
struct katcl_line *l, *k;
fd_set fsr, fsw;
struct timeval tv, when, now;
label = getenv("KATCP_LABEL");
if(label == NULL){
label = KCPCMD_NAME;
}
server = getenv("KATCP_SERVER");
if(server == NULL){
server = "localhost";
}
firm = 0;
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;
parm = NULL;
while (i < argc) {
if (argv[i][0] == '-') {
c = argv[i][j];
switch (c) {
case 'h' :
usage(app);
return 0;
case 'V' :
#ifdef VERSION
printf("%s version %s\n", app, VERSION);
#else
printf("%s version is unknown\n", app);
#endif
#ifdef __DATE__
printf("%s compiled on %s\n", app, __DATE__);
#endif
#ifdef KATCP_PROTOCOL_MAJOR_VERSION
#ifdef KATCP_PROTOCOL_MINOR_VERSION
printf("%s built for katcp %d.%d\n", app, KATCP_PROTOCOL_MAJOR_VERSION, KATCP_PROTOCOL_MINOR_VERSION);
#endif
#endif
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 'f' :
firm = 1 - firm;
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 'l' :
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 'l' :
label = argv[i] + j;
break;
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, label, "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, label, "unable to connect to %s", server);
}
return 2;
}
l = create_katcl(fd);
if(l == NULL){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "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, label, "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 */
tv.tv_sec = timeout;
tv.tv_usec = 0;
if(firm){
gettimeofday(&now, NULL);
add_time_katcp(&when, &now, &tv);
}
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);
}
if(k){
if(flushing_katcl(k)){ /* only write data if we have some */
FD_SET(STDOUT_FILENO, &fsw);
}
}
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, label, "select failed: %s", strerror(errno));
}
return 2;
}
break;
case 0 :
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "request %s timed out after %d seconds", argv[base], timeout);
}
if(verbose){
fprintf(stderr, "%s: no %s within %d seconds\n", app, firm ? "response" : "io activity", timeout);
}
/* could terminate cleanly here, but ... */
return 2;
}
if(firm){
gettimeofday(&now, NULL);
sub_time_katcp(&tv, &when, &now);
} else{
tv.tv_sec = timeout;
tv.tv_usec = 0;
}
if(FD_ISSET(fd, &fsw)){
result = write_katcl(l);
if(result < 0){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "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(k){
if(FD_ISSET(STDOUT_FILENO, &fsw)){
write_katcl(k);
}
}
if(FD_ISSET(fd, &fsr)){
result = read_katcl(l);
if(result){
if(k){
sync_message_katcl(k, KATCP_LEVEL_ERROR, label, "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;
}
if(!strcmp(KATCP_VERSION_INFORM, cmd)){
display = 0;
}
if(!strcmp(KATCP_BUILD_STATE_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, label, "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, label, "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, label, "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)
{
struct state *ss;
struct child *cx;
fd_set fsr, fsw;
char *cmd;
int i, j, c, mfd, fd, verbose, result, status;
sigset_t mask_current, mask_previous;
struct sigaction action_current, action_previous;
pid_t pid;
ss = create_state(STDOUT_FILENO);
if(ss == NULL){
return 4;
}
#if 0
char *app, *parm, *cmd, *copy, *ptr, *servers;
int verbose, result, status, base, info, reply, timeout, pos, flags, show;
int xmit, code;
unsigned int len;
info = 1;
reply = 1;
i = j = 1;
app = argv[0];
base = (-1);
timeout = 5;
pos = (-1);
k = NULL;
show = 1;
parm = NULL;
#endif
verbose = 1;
i = j = 1;
while (i < argc) {
if (argv[i][0] == '-') {
c = argv[i][j];
switch (c) {
case 'h' :
usage(argv[0]);
return 0;
case 'v' :
verbose++;
j++;
break;
case 'q' :
verbose = 0;
j++;
break;
case '-' :
j++;
break;
case '\0':
j = 1;
i++;
break;
default:
sync_message_katcl(ss->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "unknown option -%c", argv[i][j]);
return 2;
}
} else {
#ifdef DEBUG
fprintf(stderr, "about to start <%s>\n", argv[i]);
#endif
if(string_launch_child(ss, argv[i]) < 0){
sync_message_katcl(ss->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "unable to start <%s>", argv[i]);
return 4;
}
i++;
}
}
sigprocmask(SIG_SETMASK, NULL, &mask_current);
sigaddset(&mask_current, SIGCHLD);
action_current.sa_handler = &handle_child;
action_current.sa_flags = SA_NOCLDSTOP;
sigfillset(&(action_current.sa_mask));
sigaction(SIGCHLD, &action_current, &action_previous);
sigprocmask(SIG_SETMASK, &mask_current, &mask_previous);
sigemptyset(&mask_current);
#if 0
sigaddset(&mask_current, SIGTERM);
#endif
for(ss->s_finished = 0; ss->s_finished < ss->s_count;){
mfd = 0;
FD_ZERO(&fsr);
FD_ZERO(&fsw);
if(flushing_katcl(ss->s_up)){
mfd = fileno_katcl(ss->s_up);
FD_SET(mfd, &fsw);
}
for(i = 0; i < ss->s_count; i++){
cx = ss->s_vector[i];
if(cx->c_line){
fd = fileno_katcl(cx->c_line);
if(fd > mfd){
mfd = fd;
}
FD_SET(fd, &fsr);
}
}
result = pselect(mfd + 1, &fsr, &fsw, NULL, NULL, &mask_current);
#ifdef DEBUG
fprintf(stderr, "select returns %d\n", result);
#endif
switch(result){
case -1 :
switch(errno){
case EAGAIN :
case EINTR :
continue; /* WARNING */
default :
sync_message_katcl(ss->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "select failed: %s", strerror(errno));
return 4;
}
break;
case 0 :
sync_message_katcl(ss->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "requests timed out despite having no timeout");
/* could terminate cleanly here, but ... */
return 4;
}
fd = fileno_katcl(ss->s_up);
if(FD_ISSET(fd, &fsw)){
result = write_katcl(ss->s_up);
}
for(i = 0; i < ss->s_count; i++){
cx = ss->s_vector[i];
if(cx->c_line){
fd = fileno_katcl(cx->c_line);
if(FD_ISSET(fd, &fsr)){ /* get things */
result = read_katcl(cx->c_line);
if(result){
if(result < 0){
sync_message_katcl(ss->s_up, KATCP_LEVEL_ERROR, KCPCON_NAME, "read failed: %s", strerror(error_katcl(cx->c_line)));
} else {
if(cx->c_pid > 0){
log_message_katcl(ss->s_up, KATCP_LEVEL_DEBUG, KCPCON_NAME, "subordinate job %u ended", cx->c_pid);
}
}
destroy_katcl(cx->c_line, 1);
cx->c_line = NULL;
ss->s_finished++;
continue; /* WARNING */
}
}
while(have_katcl(cx->c_line) > 0){ /* compute */
cmd = arg_string_katcl(cx->c_line, 0);
if(cmd){
#ifdef DEBUG
fprintf(stderr, "reading message <%s ...>\n", cmd);
#endif
switch(cmd[0]){
case KATCP_INFORM :
#if 0
if(!strcmp(KATCP_VERSION_CONNECT_INFORM, cmd)){
}
if(!strcmp(KATCP_VERSION_INFORM, cmd)){
}
if(!strcmp(KATCP_BUILD_STATE_INFORM, cmd)){
}
#endif
relay_katcl(cx->c_line, ss->s_up);
break;
}
}
}
}
}
/* the position of this logic is rather intricate */
if(got_child_signal){
got_child_signal = 0;
while((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0){
for(i = 0; i < ss->s_count; i++){
cx = ss->s_vector[i];
if(cx->c_pid == pid){
if (WIFEXITED(status)) {
result = WEXITSTATUS(status);
log_message_katcl(ss->s_up, KATCP_LEVEL_DEBUG, KCPCON_NAME, "subordinate job[%u] %u exited with code %d", i, cx->c_pid, result);
cx->c_status = (result > 4) ? 4 : result;
} else if (WIFSIGNALED(status)) {
result = WTERMSIG(status);
log_message_katcl(ss->s_up, KATCP_LEVEL_WARN, KCPCON_NAME, "subordinate job[%u] %u killed by signal %d", i, cx->c_pid, result);
cx->c_status = 4;
} else {
log_message_katcl(ss->s_up, KATCP_LEVEL_WARN, KCPCON_NAME, "subordinate job[%u] %u return unexpected status %d", i, cx->c_pid, status);
cx->c_status = 4;
}
if(cx->c_status > ss->s_code){
ss->s_code = cx->c_status;
}
cx->c_pid = (-1);
}
}
}
}
}
/* force drain */
while(write_katcl(ss->s_up) == 0);
result = ss->s_code;
destroy_state(ss);
/* WARNING: pointlessly fussy */
sigaction(SIGCHLD, &action_previous, NULL);
sigprocmask(SIG_BLOCK, &mask_previous, NULL);
return result;
}
