// ------------------------------------------------------------------------------------------------
+/*
+ Opens the vlevel control file if needed and reads the vlevel from it.
+ The file is rewound if already open so that external updates are captured.
+ The current level is returnd; 0 on error.
+
+ The environment variable (ENV_VERBOSE_FILE) is used to supply the file to
+ open and read. If missing, we will try /tmp/rmr.v. We will try to open the file
+ on each call if not alrady open; this allows the value to be supplied after
+ start which helps debugging.
+
+ If close_file is true, then we will close the open vfd and return 0;
+*/
+extern int refresh_vlevel( int close_file ) {
+ static int vfd = -1;
+
+ char* eptr;
+ char wbuf[128]; // read buffer; MUST be 11 or greater
+ int vlevel = 0;
+
+ if( close_file ) {
+ if( vfd >= 0 ) {
+ close( vfd );
+ vfd = -1;
+ }
+ return 0;
+ }
+
+ if( vfd < 0 ) { // attempt to find/open on all calls if not open
+ if( (eptr = getenv( ENV_VERBOSE_FILE )) != NULL ) {
+ vfd = open( eptr, O_RDONLY );
+ } else {
+ vfd = open( "/tmp/rmr.v", O_RDONLY );
+ }
+ if( vfd < 0 ) {
+ return 0;
+ }
+ }
+
+ memset( wbuf, 0, sizeof( char ) * 11 ); // ensure what we read will be nil terminated
+ if( lseek( vfd, 0, SEEK_SET ) == 0 && read( vfd, wbuf, 10 ) > 0 ) {
+ vlevel = atoi( wbuf );
+ }
+
+ return vlevel;
+}
+
/*
Loop forever (assuming we're running in a pthread reading the static table
every minute or so.
static void* rtc_file( void* vctx ) {
uta_ctx_t* ctx; // context user has -- where we pin the route table
char* eptr;
- int vfd = -1; // verbose file des if we have one
int vlevel = 0; // how chatty we should be 0== no nattering allowed
char wbuf[256];
return NULL;
}
- if( (eptr = getenv( ENV_VERBOSE_FILE )) != NULL ) {
- vfd = open( eptr, O_RDONLY );
- }
-
ctx->flags |= CFL_NO_RTACK; // no attempt to ack when reading from a file
while( 1 ) {
- if( vfd >= 0 ) {
- memset( wbuf, 0, sizeof( char ) * 11 );
- if( lseek( vfd, 0, SEEK_SET ) == 0 && read( vfd, wbuf, 10 ) > 0 ) {
- vlevel = atoi( wbuf );
- }
- }
-
+ vlevel = refresh_vlevel( 0 );
read_static_rt( ctx, vlevel ); // seed the route table if one provided
if( ctx->shutdown != 0 ) { // allow for graceful termination and unit testing
- if( vfd >= 0 ) {
- close( vfd );
- }
+ refresh_vlevel( 1 ); // close the verbose file if open
return NULL;
}
sleep( 60 );
}
}
-static int refresh_vlevel( int vfd ) {
- int vlevel = 0;
- char rbuf[128];
-
- if( vfd >= 0 ) { // if file is open, read current value
- rbuf[0] = 0;
- memset( rbuf, 0, sizeof( char ) * 11 );
- if( lseek( vfd, 0, SEEK_SET ) == 0 && read( vfd, rbuf, 10 ) > 0 ) {
- vlevel = atoi( rbuf );
- }
- }
-
- return vlevel;
-}
-
/*
Rtc_parse_msg parses a single message from the route manager. We allow multiple, newline terminated,
records in each message; it is required that the last record in the message be complete (we do not
char* tokens[128];
char wbuf[128];
int ntoks;
- int vfd = -1; // verbose file des if we have one
int vlevel = 0; // how chatty we should be 0== no nattering allowed
char* eptr;
int epfd = -1; // fd for epoll so we can multi-task
return NULL;
}
- if( (eptr = getenv( ENV_VERBOSE_FILE )) != NULL ) {
- vfd = open( eptr, O_RDONLY );
- vlevel = refresh_vlevel( vfd );
- }
+ vlevel = refresh_vlevel( 0 );
if( (eptr = getenv( ENV_RTREQ_FREA )) != NULL ) {
rt_req_freq = atoi( eptr );
msg = rmr_torcv_msg( pvt_cx, msg, 1000 );
if( time( NULL ) > blabber ) {
- vlevel = refresh_vlevel( vfd );
+ vlevel = refresh_vlevel( 0 );
blabber = time( NULL ) + count_delay; // set next time to blabber, then do so
if( blabber > bump_freq ) {
count_delay = 300;
}
}
- vlevel = refresh_vlevel( vfd ); // ensure it's fresh when we get a message
+ vlevel = refresh_vlevel( 0 ); // ensure it's fresh when we get a message
if( msg != NULL && msg->len > 0 ) {
rtc_parse_msg( ctx, pvt_cx, msg, vlevel, &flags );
int pbuf_size = 0; // number allocated in pbuf
int ntoks;
int raw_interface = 1; // rtg is using raw NNG/Nano not RMr to send updates
- int vfd = -1; // verbose file des if we have one
int vlevel = 0; // how chatty we should be 0== no nattering allowed
char* eptr;
int epfd = -1; // fd for epoll so we can multi-task
return NULL;
}
- if( (eptr = getenv( ENV_VERBOSE_FILE )) != NULL ) {
- vfd = open( eptr, O_RDONLY );
- vlevel = refresh_vlevel( vfd );
- }
-
+ vlevel = refresh_vlevel( 0 );
read_static_rt( ctx, vlevel ); // seed the route table if one provided
if( (port = getenv( ENV_RTG_PORT )) == NULL || ! *port ) { // port we need to open to listen for RTG connections
}
if( time( NULL ) > blabber ) {
- vlevel = refresh_vlevel( vfd );
+ vlevel = refresh_vlevel( 0 );
if( vlevel >= 0 ) { // allow it to be forced off with -n in verbose file
blabber = time( NULL ) + count_delay; // set next time to blabber, then do so
if( blabber > bump_freq ) {
}
}
- vlevel = refresh_vlevel( vfd ); // ensure it's fresh when we get a message
+ vlevel = refresh_vlevel( 0 ); // ensure it's fresh when we get a message
if( msg != NULL && msg->len > 0 ) {
payload = msg->payload;
Code Review / ric-plt / lib / rmr.git / blobdiff