Extend jobs to support writing and use that for copy-pipe instead of popen,

from Chris Johnsen.

cmd-if-shell.c

@@ -89,7 +89,7 @@ cmd_if_shell_exec(struct cmd *self, struct cmd_q *cmdq)
 	cdata->cmdq = cmdq;
 	cmdq->references++;
 
-	job_run(shellcmd, cmd_if_shell_callback, cmd_if_shell_free, cdata);
+	job_run(shellcmd, s, cmd_if_shell_callback, cmd_if_shell_free, cdata);
 	free(shellcmd);
 
 	if (cdata->bflag)

cmd-run-shell.c

@@ -103,7 +103,7 @@ cmd_run_shell_exec(struct cmd *self, struct cmd_q *cmdq)
 	cdata->cmdq = cmdq;
 	cmdq->references++;
 
-	job_run(shellcmd, cmd_run_shell_callback, cmd_run_shell_free, cdata);
+	job_run(shellcmd, s, cmd_run_shell_callback, cmd_run_shell_free, cdata);
 
 	if (cdata->bflag)
 		return (CMD_RETURN_NORMAL);

job.c

@@ -32,13 +32,14 @@
  */
 
 void	job_callback(struct bufferevent *, short, void *);
+void	job_write_callback(struct bufferevent *, void *);
 
 /* All jobs list. */
 struct joblist	all_jobs = LIST_HEAD_INITIALIZER(all_jobs);
 
 /* Start a job running, if it isn't already. */
 struct job *
-job_run(const char *cmd,
+job_run(const char *cmd, struct session *s,
     void (*callbackfn)(struct job *), void (*freefn)(void *), void *data)
 {
 	struct job	*job;
@@ -51,7 +52,9 @@ job_run(const char *cmd,
 
 	environ_init(&env);
 	environ_copy(&global_environ, &env);
-	server_fill_environ(NULL, &env);
+	if (s != NULL)
+		environ_copy(&s->environ, &env);
+	server_fill_environ(s, &env);
 
 	switch (pid = fork()) {
 	case -1:
@@ -63,20 +66,20 @@ job_run(const char *cmd,
 		environ_push(&env);
 		environ_free(&env);
 
+		if (dup2(out[1], STDIN_FILENO) == -1)
+			fatal("dup2 failed");
 		if (dup2(out[1], STDOUT_FILENO) == -1)
 			fatal("dup2 failed");
-		if (out[1] != STDOUT_FILENO)
+		if (out[1] != STDIN_FILENO && out[1] != STDOUT_FILENO)
 			close(out[1]);
 		close(out[0]);
 
 		nullfd = open(_PATH_DEVNULL, O_RDWR, 0);
 		if (nullfd < 0)
 			fatal("open failed");
-		if (dup2(nullfd, STDIN_FILENO) == -1)
-			fatal("dup2 failed");
 		if (dup2(nullfd, STDERR_FILENO) == -1)
 			fatal("dup2 failed");
-		if (nullfd != STDIN_FILENO && nullfd != STDERR_FILENO)
+		if (nullfd != STDERR_FILENO)
 			close(nullfd);
 
 		closefrom(STDERR_FILENO + 1);
@@ -103,7 +106,8 @@ job_run(const char *cmd,
 	job->fd = out[0];
 	setblocking(job->fd, 0);
 
-	job->event = bufferevent_new(job->fd, NULL, NULL, job_callback, job);
+	job->event = bufferevent_new(job->fd, NULL, job_write_callback,
+	    job_callback, job);
 	bufferevent_enable(job->event, EV_READ);
 
 	log_debug("run job %p: %s, pid %ld", job, job->cmd, (long) job->pid);
@@ -132,6 +136,22 @@ job_free(struct job *job)
 	free(job);
 }
 
+/* Called when output buffer falls below low watermark (default is 0). */
+void
+job_write_callback(unused struct bufferevent *bufev, void *data)
+{
+	struct job	*job = data;
+	size_t		 len = EVBUFFER_LENGTH(EVBUFFER_OUTPUT(job->event));
+
+	log_debug("job write %p: %s, pid %ld, output left %lu", job, job->cmd,
+		    (long) job->pid, (unsigned long) len);
+
+	if (len == 0) {
+		shutdown(job->fd, SHUT_WR);
+		bufferevent_disable(job->event, EV_WRITE);
+	}
+}
+
 /* Job buffer error callback. */
 void
 job_callback(unused struct bufferevent *bufev, unused short events, void *data)

status.c

@@ -594,7 +594,7 @@ status_find_job(struct client *c, char **iptr)
 
 	/* If not found at all, start the job and add to the tree. */
 	if (so == NULL) {
-		job_run(cmd, status_job_callback, status_job_free, c);
+		job_run(cmd, NULL, status_job_callback, status_job_free, c);
 		c->references++;
 
 		so = xmalloc(sizeof *so);

tmux.h

@@ -776,9 +776,6 @@ struct job {
 	int		 fd;
 	struct bufferevent *event;
 
-	struct bufferevent *out;
-	int		outdone;
-
 	void		(*callbackfn)(struct job *);
 	void		(*freefn)(void *);
 	void		*data;
@@ -1610,8 +1607,8 @@ int	options_table_find(const char *, const struct options_table_entry **,
 
 /* job.c */
 extern struct joblist all_jobs;
-struct job *job_run(
-	    const char *, void (*)(struct job *), void (*)(void *), void *);
+struct job *job_run(const char *, struct session *,
+	    void (*)(struct job *), void (*)(void *), void *);
 void	job_free(struct job *);
 void	job_died(struct job *, int);
 

window-copy.c

@@ -54,7 +54,8 @@ void	window_copy_start_selection(struct window_pane *);
 int	window_copy_update_selection(struct window_pane *);
 void   *window_copy_get_selection(struct window_pane *, size_t *);
 void	window_copy_copy_buffer(struct window_pane *, int, void *, size_t);
-void	window_copy_copy_pipe(struct window_pane *, int, const char *);
+void	window_copy_copy_pipe(
+	    struct window_pane *, struct session *, int, const char *);
 void	window_copy_copy_selection(struct window_pane *, int);
 void	window_copy_clear_selection(struct window_pane *);
 void	window_copy_copy_line(
@@ -539,7 +540,7 @@ window_copy_key(struct window_pane *wp, struct session *sess, int key)
 		break;
 	case MODEKEYCOPY_COPYPIPE:
 		if (sess != NULL) {
-			window_copy_copy_pipe(wp, data->numprefix, arg);
+			window_copy_copy_pipe(wp, sess, data->numprefix, arg);
 			window_pane_reset_mode(wp);
 			return;
 		}
@@ -1397,21 +1398,20 @@ window_copy_copy_buffer(struct window_pane *wp, int idx, void *buf, size_t len)
 }
 
 void
-window_copy_copy_pipe(struct window_pane *wp, int idx, const char *arg)
+window_copy_copy_pipe(
+    struct window_pane *wp, struct session *sess, int idx, const char *arg)
 {
-	void*	buf;
-	size_t	len;
-	FILE*	f;
+	void		*buf;
+	size_t		 len;
+	struct job	*job;
+
 
 	buf = window_copy_get_selection(wp, &len);
 	if (buf == NULL)
 		return;
 
-	f = popen(arg, "w");
-	if (f != NULL) {
-		fwrite(buf, 1, len, f);
-		pclose(f);
-	}
+	job = job_run(arg, sess, NULL, NULL, NULL);
+	bufferevent_write(job->event, buf, len);
 
 	window_copy_copy_buffer(wp, idx, buf, len);
 }