[svn-commits] rmudgett: branch 1.8 r344661 - /branches/1.8/main/cli.c

[SVN commits to the Digium repositories]

Author: rmudgett
Date: Fri Nov 11 11:56:51 2011
New Revision: 344661

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=344661
Log:
Make CLI "core show channel" not hold the channel lock during console output.

Holding the channel lock while the CLI "core show channel" command is
executing can slow down the system.  It could block the system if the
console output is halted or paused.

* Made capture the CLI "core show channel" output into a buffer to be
output after the channel is unlocked.

* Removed use of C++ keyword as a variable name.  out renamed to obuf.

* Checked allocation of obuf for failure so will not crash.

(closes issue ASTERISK-18571)
Reported by: Pavel Troller
Tested by: rmudgett

Modified:
    branches/1.8/main/cli.c

Modified: branches/1.8/main/cli.c
URL: http://svnview.digium.com/svn/asterisk/branches/1.8/main/cli.c?view=diff&rev=344661&r1=344660&r2=344661
==============================================================================
--- branches/1.8/main/cli.c (original)
+++ branches/1.8/main/cli.c Fri Nov 11 11:56:51 2011
@@ -1385,11 +1385,12 @@
 {
 	struct ast_channel *c=NULL;
 	struct timeval now;
-	struct ast_str *out = ast_str_thread_get(&ast_str_thread_global_buf, 16);
 	char cdrtime[256];
 	char nf[256], wf[256], rf[256];
 	struct ast_str *write_transpath = ast_str_alloca(256);
 	struct ast_str *read_transpath = ast_str_alloca(256);
+	struct ast_str *obuf;/*!< Buffer for variable, CDR variable, and trace output. */
+	struct ast_str *output;/*!< Accumulation buffer for all output. */
 	long elapsed_seconds=0;
 	int hour=0, min=0, sec=0;
 #ifdef CHANNEL_TRACE
@@ -1416,6 +1417,15 @@
 	if (!(c = ast_channel_get_by_name(a->argv[3]))) {
 		ast_cli(a->fd, "%s is not a known channel\n", a->argv[3]);
 		return CLI_SUCCESS;
+	}
+
+	obuf = ast_str_thread_get(&ast_str_thread_global_buf, 16);
+	if (!obuf) {
+		return CLI_FAILURE;
+	}
+	output = ast_str_create(8192);
+	if (!output) {
+		return CLI_FAILURE;
 	}
 
 	ast_channel_lock(c);
@@ -1430,7 +1440,7 @@
 		strcpy(cdrtime, "N/A");
 	}
 
-	ast_cli(a->fd, 
+	ast_str_append(&output, 0,
 		" -- General --\n"
 		"           Name: %s\n"
 		"           Type: %s\n"
@@ -1489,24 +1499,28 @@
 		( c-> data ? S_OR(c->data, "(Empty)") : "(None)"),
 		(ast_test_flag(c, AST_FLAG_BLOCKING) ? c->blockproc : "(Not Blocking)"));
 	
-	if (pbx_builtin_serialize_variables(c, &out)) {
-		ast_cli(a->fd,"      Variables:\n%s\n", ast_str_buffer(out));
-	}
-
-	if (c->cdr && ast_cdr_serialize_variables(c->cdr, &out, '=', '\n', 1)) {
-		ast_cli(a->fd,"  CDR Variables:\n%s\n", ast_str_buffer(out));
+	if (pbx_builtin_serialize_variables(c, &obuf)) {
+		ast_str_append(&output, 0, "      Variables:\n%s\n", ast_str_buffer(obuf));
+	}
+
+	if (c->cdr && ast_cdr_serialize_variables(c->cdr, &obuf, '=', '\n', 1)) {
+		ast_str_append(&output, 0, "  CDR Variables:\n%s\n", ast_str_buffer(obuf));
 	}
 
 #ifdef CHANNEL_TRACE
 	trace_enabled = ast_channel_trace_is_enabled(c);
-	ast_cli(a->fd, "  Context Trace: %s\n", trace_enabled ? "Enabled" : "Disabled");
-	if (trace_enabled && ast_channel_trace_serialize(c, &out))
-		ast_cli(a->fd, "          Trace:\n%s\n", ast_str_buffer(out));
+	ast_str_append(&output, 0, "  Context Trace: %s\n",
+		trace_enabled ? "Enabled" : "Disabled");
+	if (trace_enabled && ast_channel_trace_serialize(c, &obuf)) {
+		ast_str_append(&output, 0, "          Trace:\n%s\n", ast_str_buffer(obuf));
+	}
 #endif
 
 	ast_channel_unlock(c);
 	c = ast_channel_unref(c);
 
+	ast_cli(a->fd, "%s", ast_str_buffer(output));
+	ast_free(output);
 	return CLI_SUCCESS;
 }