Add --log-directory option

For specifying directory path in which to save automatically named log
files.

src/bash-completion/tio.in

@@ -22,6 +22,7 @@ _tio()
           -e --local-echo \
           -l --log \
              --log-file \
+             --log-directory \
              --log-append \
              --log-strip \
           -m --map \
@@ -94,6 +95,10 @@ _tio()
             COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
             return 0
             ;;
+        --log-directory)
+            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            return 0
+            ;;
         --log-append)
             COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
             return 0

src/log.c

@@ -33,6 +33,7 @@
 #include "options.h"
 #include "print.h"
 #include "error.h"
+#include "misc.h"
 
 #define IS_ESC_CSI_INTERMEDIATE_CHAR(c) ((c >= 0x20) && (c <= 0x3F))
 #define IS_ESC_END_CHAR(c)              ((c >= 0x30) && (c <= 0x7E))
@@ -58,13 +59,29 @@ static char *date_time(void)
 
 int log_open(const char *filename)
 {
-    static char automatic_filename[400];
+    char *automatic_filename;
+    char *dir_plus_automatic_filename;
 
     if (filename == NULL)
     {
         // Generate filename if none provided ("tio_DEVICE_YYYY-MM-DDTHH:MM:SS.log")
-        sprintf(automatic_filename, "tio_%s_%s.log", basename((char *)option.tty_device), date_time());
-        filename = automatic_filename;
+        asprintf(&automatic_filename, "tio_%s_%s.log", basename((char *)option.tty_device), date_time());
+
+        if (option.log_directory != NULL)
+        {
+            if (fs_dir_exists(option.log_directory) == false)
+            {
+                tio_error_printf("Log directory not found");
+                exit(EXIT_FAILURE);
+            }
+
+            asprintf(&dir_plus_automatic_filename, "%s/%s", option.log_directory, automatic_filename);
+            filename = dir_plus_automatic_filename;
+        }
+        else
+        {
+            filename = automatic_filename;
+        }
     }
 
     log_filename = filename;
@@ -72,12 +89,12 @@ int log_open(const char *filename)
     // Open log file
     if (option.log_append)
     {
-        // Appends to existing log file
+        // Append to existing log file
         fp = fopen(filename, "a+");
     }
     else
     {
-        // Truncates existing log file
+        // Truncate existing log file
         fp = fopen(filename, "w+");
     }
     if (fp == NULL)
@@ -202,7 +219,7 @@ void log_close(void)
 
 void log_exit(void)
 {
-    if (option.log)
+    if ((option.log) && (log_filename != NULL))
     {
         tio_printf("Saved log to file %s", log_filename);
         log_close();

src/misc.c

@@ -24,6 +24,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <sys/stat.h>
 #include <time.h>
 #include <errno.h>
 #include "error.h"
@@ -70,3 +71,19 @@ int ctrl_key_code(unsigned char key)
 
     return -1;
 }
+
+bool fs_dir_exists(const char *path)
+{
+    struct stat st;
+
+    if (stat(path, &st) != 0)
+    {
+        return false;
+    }
+    else if (!S_ISDIR(st.st_mode))
+    {
+        return false;
+    }
+
+    return true;
+}

src/misc.h

@@ -21,6 +21,8 @@
 
 #pragma once
 
+#include <stdbool.h>
+
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
 char * current_time(void);
@@ -29,6 +31,7 @@ long string_to_long(char *string);
 int ctrl_key_code(unsigned char key);
 void alert_connect(void);
 void alert_disconnect(void);
+bool fs_dir_exists(const char *path);
 
 extern char key_hit;
 int xymodem_send(int sio, const char *filename, char mode);

src/options.c

@@ -46,6 +46,7 @@ enum opt_t
     OPT_NONE,
     OPT_TIMESTAMP_FORMAT,
     OPT_LOG_FILE,
+    OPT_LOG_DIRECTORY,
     OPT_LOG_STRIP,
     OPT_LOG_APPEND,
     OPT_LINE_PULSE_DURATION,
@@ -81,6 +82,7 @@ struct option_t option =
     .log = false,
     .log_append = false,
     .log_filename = NULL,
+    .log_directory = NULL,
     .log_strip = false,
     .local_echo = false,
     .timestamp = TIMESTAMP_NONE,
@@ -129,6 +131,7 @@ void print_help(char *argv[])
     printf("  -L, --list-devices                     List available serial devices by ID\n");
     printf("  -l, --log                              Enable log to file\n");
     printf("      --log-file <filename>              Set log filename\n");
+    printf("      --log-directory <path>             Set log directory path (for automatic named logs)\n");
     printf("      --log-append                       Append to log file\n");
     printf("      --log-strip                        Strip control characters and escape sequences\n");
     printf("  -m, --map <flags>                      Map characters\n");
@@ -295,6 +298,7 @@ void options_parse(int argc, char *argv[])
             {"list-devices",         no_argument,       0, 'L'                     },
             {"log",                  no_argument,       0, 'l'                     },
             {"log-file",             required_argument, 0, OPT_LOG_FILE            },
+            {"log-directory",        required_argument, 0, OPT_LOG_DIRECTORY       },
             {"log-append",           no_argument,       0, OPT_LOG_APPEND          },
             {"log-strip",            no_argument,       0, OPT_LOG_STRIP           },
             {"socket",               required_argument, 0, 'S'                     },
@@ -399,6 +403,10 @@ void options_parse(int argc, char *argv[])
                 option.log_filename = optarg;
                 break;
 
+            case OPT_LOG_DIRECTORY:
+                option.log_directory = optarg;
+                break;
+
             case OPT_LOG_STRIP:
                 option.log_strip = true;
                 break;

src/options.h

@@ -54,6 +54,7 @@ struct option_t
     bool local_echo;
     enum timestamp_t timestamp;
     const char *log_filename;
+    const char *log_directory;
     const char *map;
     const char *socket;
     int color;