1 // vim: ts=4 sw=4 noet:
3 --------------------------------------------------------------------------------
4 Copyright (c) 2018-2019 AT&T Intellectual Property.
6 Licensed under the Apache License, Version 2.0 (the "License");
7 you may not use this file except in compliance with the License.
8 You may obtain a copy of the License at
10 http://www.apache.org/licenses/LICENSE-2.0
12 Unless required by applicable law or agreed to in writing, software
13 distributed under the License is distributed on an "AS IS" BASIS,
14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 See the License for the specific language governing permissions and
16 limitations under the License.
17 --------------------------------------------------------------------------------
21 Mnemonic: pipe_reader.c
22 Abstract: Read a single pipe which was associated with a message type. This
23 programme is primarily for verification or example of how to use the
24 read1() function in the mc-listener library.
27 Author: E. Scott Daniels
41 //---- support -----------------------------------------------------------------------------
43 static void bad_arg( char* what ) {
44 fprintf( stderr, "[ERR] option is unrecognised or isn't followed by meaningful data: %s\n", what );
47 static void usage( char* argv0 ) {
48 fprintf( stderr, "usage: %s [-d fifo-dir] [-e] [-m msg-type] [-s]\n", argv0 );
49 fprintf( stderr, " -d dir (default is /tmp/mcl/fifos)\n" );
50 fprintf( stderr, " -e disable extended headers expectation in FIFO data\n" );
51 fprintf( stderr, " -m msg-type (default is 0)\n" );
52 fprintf( stderr, " -s stats only mode\n" );
56 We exit on any trapped signal so that we can kill -15 the proecss
57 and still get gcoverage information to keep sonar happy.
59 static void sigh( int sig ) {
60 fprintf( stderr, "\n[INFO] exiting on signal %d\n", sig );
64 //------------------------------------------------------------------------------------------
65 int main( int argc, char** argv ) {
66 void* ctx; // the mc listener library context
67 char* dname = "/tmp/mcl/fifos"; // default directory where we open fifos
68 int pidx = 1; // parameter index
74 int long_hdrs = 1; // -e is on command line turns this off, by default we expect long headers
76 char timestamp[MCL_TSTAMP_SIZE]; // we'll get the timestamp from this
80 signal( SIGINT, sigh );
81 signal( SIGTERM, sigh );
83 while( pidx < argc && argv[pidx][0] == '-' ) { // simple argument parsing (-x or -x value)
84 switch( argv[pidx][1] ) {
87 dname = strdup( argv[pidx+1] );
90 bad_arg( argv[pidx] );
104 if( pidx+1 < argc ) {
105 mtype = atoi( argv[pidx+1] );
108 bad_arg( argv[pidx] );
123 bad_arg( argv[pidx] );
136 ctx = mcl_mk_context( dname ); // initialise the library context
138 fprintf( stderr, "[FAIL] couldn't initialise the mc listener library" );
143 len = mcl_fifo_tsread1( ctx, mtype, buf, sizeof( buf ) -1, long_hdrs, timestamp );
146 if( time( NULL ) > blabber ) {
147 fprintf( stdout, "[%d] %ld messages received\n", mtype, count );
148 blabber = time( NULL ) + 2;
152 fprintf( stdout, "[%d] ts=%s count=%ld len=%d msg=%s\n", mtype, timestamp, count, len, buf );