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authorJosé Bollo <jose.bollo@iot.bzh>2018-06-22 18:25:25 +0200
committerJosé Bollo <jose.bollo@iot.bzh>2018-06-22 18:25:25 +0200
commit1f9e60c26a10bc4232b4827e85235dafcee17120 (patch)
treecb705428bbb9d1b7140d7a34bc4a3350a98a89f2
parentb474ee6a3905edba5d0aae1350ca2e58efa19622 (diff)
main-afb-client-demo: Allow scripting
This version allows to pipe from a script shell. Change-Id: Ia2bb3e059b8a5a1b097178d2883ef385e7efcdca Signed-off-by: José Bollo <jose.bollo@iot.bzh>
-rw-r--r--src/main-afb-client-demo.c76
1 files changed, 61 insertions, 15 deletions
diff --git a/src/main-afb-client-demo.c b/src/main-afb-client-demo.c
index fab56f1d..3da7e46e 100644
--- a/src/main-afb-client-demo.c
+++ b/src/main-afb-client-demo.c
@@ -49,7 +49,9 @@ static void on_pws_event_unsubscribe(void *closure, void *request, const char *e
static void on_pws_event_push(void *closure, const char *event_name, int event_id, struct json_object *data);
static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data);
-static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, void *closure);
+static void idle();
+static int process_stdin();
+static int on_stdin(sd_event_source *src, int fd, uint32_t revents, void *closure);
static void wsj1_emit(const char *api, const char *verb, const char *object);
static void pws_call(const char *verb, const char *object);
@@ -83,6 +85,9 @@ static int raw;
static int keeprun;
static int direct;
static int echo;
+static int synchro;
+static int usein;
+static sd_event *loop;
static sd_event_source *evsrc;
static char *sessionid = "afb-client-demo";
@@ -101,6 +106,7 @@ static void usage(int status, char *arg0)
" --help, -h Display this help\n"
" --human, -H Display human readable JSON\n"
" --raw, -r Raw output (default)\n"
+ " --sync, -s Synchronous: wait for answers\n"
" --keep-running, -k Keep running until disconnect, even if input closed\n"
"Example:\n"
" %s --human 'localhost:1234/api?token=HELLO&uuid=magic' hello ping\n"
@@ -115,7 +121,6 @@ int main(int ac, char **av, char **env)
{
int rc;
char *a0;
- sd_event *loop;
/* get the program name */
a0 = av[0];
@@ -140,6 +145,9 @@ int main(int ac, char **av, char **env)
else if (!strcmp(av[1], "--keep-running")) /* request to break connection */
keeprun = 1;
+ else if (!strcmp(av[1], "--sync")) /* request to break connection */
+ synchro = 1;
+
else if (!strcmp(av[1], "--echo")) /* request to echo inputs */
echo = 1;
@@ -155,6 +163,7 @@ int main(int ac, char **av, char **env)
case 'd': direct = 1; break;
case 'b': breakcon = 1; break;
case 'k': keeprun = 1; break;
+ case 's': synchro = 1; break;
case 'e': echo = 1; break;
default: usage(av[1][rc] != 'h', a0);
}
@@ -197,10 +206,13 @@ int main(int ac, char **av, char **env)
/* test the behaviour */
if (ac == 2) {
/* get requests from stdin */
+ usein = 1;
fcntl(0, F_SETFL, O_NONBLOCK);
- sd_event_add_io(loop, &evsrc, 0, EPOLLIN, io_event_callback, NULL);
+ if (sd_event_add_io(loop, &evsrc, 0, EPOLLIN, on_stdin, NULL) < 0)
+ evsrc = NULL;
} else {
/* the request is defined by the arguments */
+ usein = 0;
exonrep = !keeprun;
if (direct)
pws_call(av[2], av[3]);
@@ -209,11 +221,27 @@ int main(int ac, char **av, char **env)
}
/* loop until end */
- for(;;)
- sd_event_run(loop, 30000000);
+ idle();
return 0;
}
+static void idle()
+{
+ for(;;) {
+ if (!usein) {
+ if (!keeprun && !callcount)
+ exit(0);
+ sd_event_run(loop, 30000000);
+ }
+ else if (!synchro || !callcount) {
+ if (!process_stdin() && usein)
+ sd_event_run(loop, 100000);
+ } else {
+ sd_event_run(loop, 30000000);
+ }
+ }
+}
+
/* decrement the count of calls */
static void dec_callcount()
{
@@ -324,36 +352,42 @@ static void wsj1_emit(const char *api, const char *verb, const char *object)
exit(0);
}
-/* called when something happens on stdin */
-static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, void *closure)
+/* process stdin */
+static int process_stdin()
{
static size_t count = 0;
static char line[16384];
static char sep[] = " \t";
static char sepnl[] = " \t\n";
- ssize_t rc;
+ int result = 0;
+ ssize_t rc = 0;
size_t pos;
/* read the buffer */
- do { rc = read(0, line + count, sizeof line - count); } while (rc < 0 && errno == EINTR);
+ while (sizeof line > count) {
+ rc = read(0, line + count, sizeof line - count);
+ if (rc >= 0 || errno != EINTR)
+ break;
+ }
if (rc < 0) {
fprintf(stderr, "read error: %m\n");
exit(1);
}
if (rc == 0) {
- if (!keeprun) {
+ usein = count != 0;
+ if (!usein && !keeprun) {
if (!callcount)
exit(0);
exonrep = 1;
}
- sd_event_source_unref(evsrc);
}
count += (size_t)rc;
+ if (synchro && callcount)
+ return 0;
/* normalise the buffer content */
/* TODO: handle backspace \x7f ? */
-
/* process the lines */
pos = 0;
for(;;) {
@@ -372,6 +406,7 @@ static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, voi
rest[0] = i; while(i < count && line[i] != '\n') i++; rest[1] = i;
if (i == count) break;
line[i++] = 0;
+ pos = i;
if (api[0] == api[1]) {
/* empty line */
} else if (line[api[0]] == '#') {
@@ -384,8 +419,9 @@ static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, voi
pws_call(line + verb[0], line + rest[0]);
else
wsj1_emit(line + api[0], line + verb[0], line + rest[0]);
+ result = 1;
+ break;
}
- pos = i;
}
count -= pos;
if (count == sizeof line) {
@@ -394,6 +430,18 @@ static int io_event_callback(sd_event_source *src, int fd, uint32_t revents, voi
}
if (count)
memmove(line, line + pos, count);
+
+ return result;
+}
+
+/* called when something happens on stdin */
+static int on_stdin(sd_event_source *src, int fd, uint32_t revents, void *closure)
+{
+ process_stdin();
+ if (!usein) {
+ sd_event_source_unref(src);
+ evsrc = NULL;
+ }
return 1;
}
@@ -504,5 +552,3 @@ static void on_pws_hangup(void *closure)
fflush(stdout);
exit(0);
}
-
-