Allow single log file with fixed name rather than starting a new one each day.

CHANGES.md

@@ -9,10 +9,11 @@ This is a snapshot of ongoing development towards version of 1.5.  Some features
 
 - Time slots for beaconing.
 
-- V20 configuration item for listing stations known not to understaand AX.25 v2.2.  This will speed up connection by going right to SABM and not trying SABME first and failing.
-
 - Documentation updates describing cheap SDR frequency inaccuracy and how to compensate for it.
 
+- Allow single log file with fixed name rather than starting a new one each day.
+
+
 ### Bugs Fixed: ###
 
 - PACLEN configuration item no longer restricts length of received frames.
@@ -31,7 +32,7 @@ This is a snapshot of ongoing development towards version of 1.5.  Some features
 
 - decode_aprs utility can now accept KISS frames and AX.25 frames as series of two digit hexadecimal numbers.
 
-- New configuration option, V20, for listing stations known to not understand AX.25 v2.2.
+- New configuration option, V20, for listing stations known to not understand AX.25 v2.2.  This will speed up connection by going right to SABM and not trying SABME first and failing.
 
 
 ### Bugs Fixed: ###

config.c

@@ -877,7 +877,8 @@ void config_init (char *fname, struct audio_s *p_audio_config,
 	strlcpy (p_misc_config->gpsnmea_port, "", sizeof(p_misc_config->gpsnmea_port));
 	strlcpy (p_misc_config->waypoint_port, "", sizeof(p_misc_config->waypoint_port));
 
-	strlcpy (p_misc_config->logdir, "", sizeof(p_misc_config->logdir));
+	p_misc_config->log_daily_names = 0;
+	strlcpy (p_misc_config->log_path, "", sizeof(p_misc_config->log_path));
 
 	/* connected mode. */
 
@@ -4283,7 +4284,7 @@ void config_init (char *fname, struct audio_s *p_audio_config,
 	  }
 
 /*
- * LOGDIR	- Directory name for storing log files.  Use "." for current working directory.
+ * LOGDIR	- Directory name for automatically named daily log files.  Use "." for current working directory.
  */
 	  else if (strcasecmp(t, "logdir") == 0) {
 	    t = split(NULL,0);
@@ -4293,7 +4294,12 @@ void config_init (char *fname, struct audio_s *p_audio_config,
 	      continue;
 	    }
 	    else {
-	      strlcpy (p_misc_config->logdir, t, sizeof(p_misc_config->logdir));
+	      if (strlen(p_misc_config->log_path) > 0) {
+	        text_color_set(DW_COLOR_ERROR);
+	        dw_printf ("Config file: LOGDIR on line %d is replacing an earlier LOGDIR or LOGFILE.\n", line);
+	      }
+	      p_misc_config->log_daily_names = 1;
+	      strlcpy (p_misc_config->log_path, t, sizeof(p_misc_config->log_path));
 	    }
 	    t = split(NULL,0);
 	    if (t != NULL) {
@@ -4302,6 +4308,31 @@ void config_init (char *fname, struct audio_s *p_audio_config,
 	    }
 	  }
 
+/*
+ * LOGFILE	- Log file name, including any directory part.
+ */
+	  else if (strcasecmp(t, "logfile") == 0) {
+	    t = split(NULL,0);
+	    if (t == NULL) {
+	      text_color_set(DW_COLOR_ERROR);
+	      dw_printf ("Config file: Missing file name for LOGFILE on line %d.\n", line);
+	      continue;
+	    }
+	    else {
+	      if (strlen(p_misc_config->log_path) > 0) {
+	        text_color_set(DW_COLOR_ERROR);
+	        dw_printf ("Config file: LOGFILE on line %d is replacing an earlier LOGDIR or LOGFILE.\n", line);
+	      }
+	      p_misc_config->log_daily_names = 0;
+	      strlcpy (p_misc_config->log_path, t, sizeof(p_misc_config->log_path));
+	    }
+	    t = split(NULL,0);
+	    if (t != NULL) {
+	      text_color_set(DW_COLOR_ERROR);
+	      dw_printf ("Config file: LOGFILE on line %d should have file name and nothing more.\n", line);
+	    }
+	  }
+
 /*
  * BEACON channel delay every message
  *

config.h

@@ -77,7 +77,9 @@ struct misc_config_s {
 #define WPT_FORMAT_KENWOOD      0x08		/* K	$PKWDWPL */
 
 
-	char logdir[80];	/* Directory for saving activity logs. */
+	int log_daily_names;	/* True to generate new log file each day. */
+
+	char log_path[80];	/* Either directory or full file name depending on above. */
 
 	int sb_configured;	/* TRUE if SmartBeaconing is configured. */
 	int sb_fast_speed;	/* MPH */

direwolf.c

@@ -194,7 +194,8 @@ int main (int argc, char *argv[])
 	struct igate_config_s igate_config;
 	int r_opt = 0, n_opt = 0, b_opt = 0, B_opt = 0, D_opt = 0;	/* Command line options. */
 	char P_opt[16];
-	char l_opt[80];
+	char l_opt_logdir[80];
+	char L_opt_logfile[80];
 	char input_file[80];
 	// char timestamp[16];
 	
@@ -215,7 +216,8 @@ int main (int argc, char *argv[])
 	int E_tx_opt = 0;		/* "-E n" Error rate % for clobbering trasmit frames. */
 	int E_rx_opt = 0;		/* "-E Rn" Error rate % for clobbering receive frames. */
 
-	strlcpy(l_opt, "", sizeof(l_opt));
+	strlcpy(l_opt_logdir, "", sizeof(l_opt_logdir));
+	strlcpy(L_opt_logfile, "", sizeof(L_opt_logfile));
 	strlcpy(P_opt, "", sizeof(P_opt));
 
 #if __WIN32__
@@ -356,7 +358,7 @@ int main (int argc, char *argv[])
 
 	  /* ':' following option character means arg is required. */
 
-          c = getopt_long(argc, argv, "P:B:D:c:pxr:b:n:d:q:t:Ul:Sa:E:",
+          c = getopt_long(argc, argv, "P:B:D:c:pxr:b:n:d:q:t:Ul:L:Sa:E:",
                         long_options, &option_index);
           if (c == -1)
             break;
@@ -532,11 +534,17 @@ int main (int argc, char *argv[])
 	    exit (0);
 	    break;
 
-          case 'l':				/* -l for log file directory name */
+          case 'l':				/* -l for log directory with daily files */
 
-	    strlcpy (l_opt, optarg, sizeof(l_opt));
+	    strlcpy (l_opt_logdir, optarg, sizeof(l_opt_logdir));
             break;
 
+          case 'L':				/* -L for log file name with full path */
+
+	    strlcpy (L_opt_logfile, optarg, sizeof(L_opt_logfile));
+            break;
+
+
 	  case 'S':				/* Print symbol tables and exit. */
 
 	    symbols_init ();
@@ -674,8 +682,19 @@ int main (int argc, char *argv[])
 	audio_config.recv_error_rate = E_rx_opt;
 
 
-	if (strlen(l_opt) > 0) {
+	if (strlen(l_opt_logdir) > 0 && strlen(L_opt_logfile) > 0) {
-	  strlcpy (misc_config.logdir, l_opt, sizeof(misc_config.logdir));
+          text_color_set(DW_COLOR_ERROR);
+	  dw_printf ("Logging options -l and -L can't be used together.  Pick one or the other.\n");
+	  exit(1);
+	}
+
+	if (strlen(L_opt_logfile) > 0) {
+	  misc_config.log_daily_names = 0;
+	  strlcpy (misc_config.log_path, L_opt_logfile, sizeof(misc_config.log_path));
+	}
+	else if (strlen(l_opt_logdir) > 0) {
+	  misc_config.log_daily_names = 1;
+	  strlcpy (misc_config.log_path, l_opt_logdir, sizeof(misc_config.log_path));
 	}
 
 	misc_config.enable_kiss_pt = enable_pseudo_terminal;
@@ -794,7 +813,7 @@ int main (int argc, char *argv[])
  * log the tracker beacon transmissions with fake channel 999.
  */
 
-	log_init(misc_config.logdir);
+	log_init(misc_config.log_daily_names, misc_config.log_path);
 	mheard_init (d_m_opt);
 	beacon_init (&audio_config, &misc_config, &igate_config);
 

log.c

@@ -28,6 +28,13 @@
  *		unreadable, format, write separated properties into 
  *		CSV format for easy reading and later processing.
  *
+ *		There are two alternatives here.
+ *
+ *		-L logfile		Specify full file path.
+ *
+ *		-l logdir		Daily names will be created here.
+ *
+ *		Use one or the other but not both.
  *
  *------------------------------------------------------------------*/
 
@@ -91,26 +98,39 @@ static void quote_for_csv (char *out, size_t outsize, const char *in) {
  *
  * Purpose:	Initialization at start of application.
  *
- * Inputs:	path		- Path of log file directory.
+ * Inputs:	daily_names	- True if daily names should be generated.
+ *				  In this case path is a directory.
+ *				  When false, path would be the file name.
+ *
+ *		path		- Log file name or just directory.
  *				  Use "." for current directory.
  *				  Empty string disables feature.
  *
- * Global Out:	g_log_dir 	- Save directory here for later use.
+ * Global Out:	g_daily_names	- True if daily names should be generated.
+ *
+ *		g_log_path 	- Save directory or full name here for later use.
+ *
  *		g_log_fp	- File pointer for writing.
+ *				  Note that file is kept open.
+ *				  We don't open/close for every new item.
+ *
  *		g_open_fname	- Name of currently open file.
+ *				  Applicable only when g_daily_names is true.
  *
  *------------------------------------------------------------------*/
 
-static char g_log_dir[80];
+static int g_daily_names;
+static char g_log_path[80];
 static FILE *g_log_fp;
 static char g_open_fname[20];
 
 
-void log_init (char *path) 
+void log_init (int daily_names, char *path)
 { 
 	struct stat st;
 
-	strlcpy (g_log_dir, "", sizeof(g_log_dir));
+	g_daily_names = daily_names;
+	strlcpy (g_log_path, "", sizeof(g_log_path));
 	g_log_fp = NULL;
 	strlcpy (g_open_fname, "", sizeof(g_open_fname));
 
@@ -118,17 +138,21 @@ void log_init (char *path)
 	  return;
 	}
 
+	if (g_daily_names) {
+
+// Original strategy.  Automatic daily file names.
+
 	  if (stat(path,&st) == 0) {
 	    // Exists, but is it a directory?
 	    if (S_ISDIR(st.st_mode)) {
 	      // Specified directory exists.
-	    strlcpy (g_log_dir, path, sizeof(g_log_dir));
+	      strlcpy (g_log_path, path, sizeof(g_log_path));
 	    }
 	    else {
 	      text_color_set(DW_COLOR_ERROR);
 	      dw_printf ("Log file location \"%s\" is not a directory.\n", path);
 	      dw_printf ("Using current working directory \".\" instead.\n");
-	    strlcpy (g_log_dir, ".", sizeof(g_log_dir));
+	      strlcpy (g_log_path, ".", sizeof(g_log_path));
 	    }
 	  }
 	  else {
@@ -143,17 +167,28 @@ void log_init (char *path)
 	      // Success.
 	      text_color_set(DW_COLOR_INFO);
 	      dw_printf ("Log file location \"%s\" has been created.\n", path);
-	    strlcpy (g_log_dir, path, sizeof(g_log_dir));
+	      strlcpy (g_log_path, path, sizeof(g_log_path));
 	    }
 	    else {
 	      text_color_set(DW_COLOR_ERROR);
 	      dw_printf ("Failed to create log file location \"%s\".\n", path);
 	      dw_printf ("%s\n", strerror(errno));
 	      dw_printf ("Using current working directory \".\" instead.\n");
-	    strlcpy (g_log_dir, ".", sizeof(g_log_dir));
+	      strlcpy (g_log_path, ".", sizeof(g_log_path));
 	    }
 	  }
-}
+	}
+	else {
+
+// Added in version 1.5.  Single file.
+// Typically logrotate would be used to keep size under control.
+
+	  text_color_set(DW_COLOR_INFO);
+	  dw_printf ("Log file is \"%s\"\n", path);
+	  strlcpy (g_log_path, path, sizeof(g_log_path));
+	}
+
+} /* end log_init */
 
 
 
@@ -177,17 +212,25 @@ void log_init (char *path)
 
 void log_write (int chan, decode_aprs_t *A, packet_t pp, alevel_t alevel, retry_t retries)
 {
-	time_t now; 		// make 'now' a parameter so we can process historical data ???
+	time_t now;
-	char fname[20];
 	struct tm tm;
 
 
-	if (strlen(g_log_dir) == 0) return;
+	if (strlen(g_log_path) == 0) return;
+
+	now = time(NULL);			// Get current time.
+	(void)gmtime_r (&now, &tm);	
+
+
+	if (g_daily_names) {
+
+// Original strategy.  Automatic daily file names.
+
+	  char fname[20];
 
 	  // Generate the file name from current date, UTC.
-
+	  // Why UTC rather than local time?  I don't recall the reasoning.
-	now = time(NULL);
+	  // It's been there a few years and no on complained so leave it alone for now.
-	(void)gmtime_r (&now, &tm);	
 
 	  // Microsoft doesn't recognize %F as equivalent to %Y-%m-%d
 
@@ -206,7 +249,7 @@ void log_write (int chan, decode_aprs_t *A, packet_t pp, alevel_t alevel, retry_
 	    struct stat st;
 	    int already_there;
 
-	  strlcpy (full_path, g_log_dir, sizeof(full_path));
+	    strlcpy (full_path, g_log_path, sizeof(full_path));
 #if __WIN32__
 	    strlcat (full_path, "\\", sizeof(full_path));
 #else
@@ -214,10 +257,10 @@ void log_write (int chan, decode_aprs_t *A, packet_t pp, alevel_t alevel, retry_
 #endif
 	    strlcat (full_path, fname, sizeof(full_path));
 
-	  // See if it already exists.
+	    // See if file already exists and not empty.
 	    // This is used later to write a header if it did not exist already.
 
-	  already_there = stat(full_path,&st) == 0;
+	    already_there = (stat(full_path,&st) == 0) && (st.st_size > 0);
 
 	    text_color_set(DW_COLOR_INFO);
 	    dw_printf("Opening log file \"%s\".\n", fname);
@@ -242,6 +285,46 @@ void log_write (int chan, decode_aprs_t *A, packet_t pp, alevel_t alevel, retry_
 	      fprintf (g_log_fp, "chan,utime,isotime,source,heard,level,error,dti,name,symbol,latitude,longitude,speed,course,altitude,frequency,offset,tone,system,status,telemetry,comment\n");
 	    }
 	  }
+	}
+	else {
+
+// Added in version 1.5.  Single file.
+
+	  // Open for append if not already open.
+
+	  if (g_log_fp == NULL) {
+	    struct stat st;
+	    int already_there;
+
+	    // See if file already exists and not empty.
+	    // This is used later to write a header if it did not exist already.
+
+	    already_there = (stat(g_log_path,&st) == 0) && (st.st_size > 0);
+
+	    text_color_set(DW_COLOR_INFO);
+	    dw_printf("Opening log file \"%s\"\n", g_log_path);
+
+	    g_log_fp = fopen (g_log_path, "a");
+
+	    if (g_log_fp == NULL) {
+	      text_color_set(DW_COLOR_ERROR);
+	      dw_printf("Can't open log file \"%s\" for write.\n", g_log_path);
+	      dw_printf ("%s\n", strerror(errno));
+	      strlcpy (g_log_path, "", sizeof(g_log_path));
+	      return;
+	    }
+
+	    // Write a header suitable for importing into a spreadsheet
+	    // only if this will be the first line.
+
+	    if ( ! already_there) {
+	      fprintf (g_log_fp, "chan,utime,isotime,source,heard,level,error,dti,name,symbol,latitude,longitude,speed,course,altitude,frequency,offset,tone,system,status,telemetry,comment\n");
+	    }
+	  }
+	}
+
+
+// Add line to file if it is now open.
 
 	if (g_log_fp != NULL) {
 
@@ -439,7 +522,13 @@ void log_term (void)
 	if (g_log_fp != NULL) {
 
 	  text_color_set(DW_COLOR_INFO);
+
+	  if (g_daily_names) {
 	    dw_printf("Closing log file \"%s\".\n", g_open_fname);
+	  }
+	  else {
+	    dw_printf("Closing log file \"%s\".\n", g_log_path);
+	  }
 
 	  fclose (g_log_fp);
 

log.h

@@ -10,7 +10,7 @@
 
 
 
-void log_init (char *path);	
+void log_init (int daily_names, char *path);
 
 void log_write (int chan, decode_aprs_t *A, packet_t pp, alevel_t alevel, retry_t retries);
 

man1/direwolf.1

@@ -27,8 +27,12 @@ RMS Express, and many others.
 Read configuration file from specified location rather than the default locations.
 
 .TP
-.BI "-l " "dir"
+.BI "-l " "logdir"
-Generate log files in specified directory.  Use "." for current directory.
+Generate daily log files in specified directory.  Use "." for current directory.
+
+.TP
+.BI "-L " "logfile"
+Generate single log file with fixed name.
 
 .TP
 .BI "-r " "n"