Allow setting custom log file via -f FILENAME

`profanity -f TEST` will use `~/.local/share/profanity/logs/TEST.log` as
the log file.

src/config/files.c

@@ -112,16 +112,26 @@ files_get_inputrc_file(void)
 }
 
 char*
-files_get_log_file(void)
+files_get_log_file(char *log_file)
 {
     gchar *xdg_data = _files_get_xdg_data_home();
     GString *logfile = g_string_new(xdg_data);
-    g_string_append(logfile, "/profanity/logs/profanity");
+
+    if (log_file) {
+        g_string_append(logfile, "/profanity/logs/");
+        g_string_append(logfile, log_file);
+    } else {
+        g_string_append(logfile, "/profanity/logs/profanity");
+    }
+
     if (!prefs_get_boolean(PREF_LOG_SHARED)) {
         g_string_append_printf(logfile, "%d", getpid());
     }
+
     g_string_append(logfile, ".log");
+
     char *result = strdup(logfile->str);
+
     free(xdg_data);
     g_string_free(logfile, TRUE);
 

src/config/files.h

@@ -61,7 +61,7 @@ void files_create_directories(void);
 char* files_get_config_path(char *config_base);
 char* files_get_data_path(char *data_base);
 
-char* files_get_log_file(void);
+char* files_get_log_file(char *log_file);
 char* files_get_inputrc_file(void);
 
 #endif

src/log.c

@@ -55,7 +55,7 @@
 #define PROF "prof"
 
 static FILE *logp;
-GString *mainlogfile;
+GString *mainlogfile = NULL;
 
 static GTimeZone *tz;
 static GDateTime *dt;
@@ -144,22 +144,32 @@ log_error(const char *const msg, ...)
 }
 
 void
-log_init(log_level_t filter)
+log_init(log_level_t filter, char *log_file)
 {
     level_filter = filter;
     tz = g_time_zone_new_local();
-    char *log_file = files_get_log_file();
-    logp = fopen(log_file, "a");
-    g_chmod(log_file, S_IRUSR | S_IWUSR);
-    mainlogfile = g_string_new(log_file);
-    free(log_file);
+
+    char *lf;
+    lf = files_get_log_file(log_file);
+
+    logp = fopen(lf, "a");
+    g_chmod(lf, S_IRUSR | S_IWUSR);
+    mainlogfile = g_string_new(lf);
+    free(lf);
 }
 
 void
 log_reinit(void)
 {
+    char *lf = strdup(mainlogfile->str);
+    char *start = strrchr(lf, '/') +1;
+    char *end = strstr(start, ".log");
+    *end = '\0';
+
     log_close();
-    log_init(level_filter);
+    log_init(level_filter, start);
+
+    free(lf);
 }
 
 char*
@@ -229,7 +239,7 @@ log_level_from_string(char *log_level)
 static void
 _rotate_log_file(void)
 {
-    gchar *log_file = files_get_log_file();
+    gchar *log_file = mainlogfile->str;
     size_t len = strlen(log_file);
     gchar *log_file_new = malloc(len + 4);
     int i = 1;
@@ -241,10 +251,18 @@ _rotate_log_file(void)
             break;
     }
 
-    log_close();
-    rename(log_file, log_file_new);
-    log_init(log_get_filter());
+    char *lf = strdup(mainlogfile->str);
+    char *start = strrchr(lf, '/') +1;
+    char *end = strstr(start, ".log");
+    *end = '\0';
 
+    log_close();
+
+    rename(log_file, log_file_new);
+
+    log_init(log_get_filter(), start);
+
+    free(lf);
     free(log_file_new);
     free(log_file);
     log_info("Log has been rotated");

src/log.h

@@ -53,7 +53,7 @@ typedef enum {
     PROF_OUT_LOG
 } chat_log_direction_t;
 
-void log_init(log_level_t filter);
+void log_init(log_level_t filter, char *log_file);
 log_level_t log_get_filter(void);
 void log_close(void);
 void log_reinit(void);

src/main.c

@@ -61,6 +61,7 @@
 
 static gboolean version = FALSE;
 static char *log = "INFO";
+static char *log_file = NULL;
 static char *account_name = NULL;
 static char *config_file = NULL;
 
@@ -76,8 +77,9 @@ main(int argc, char **argv)
     {
         { "version", 'v', 0, G_OPTION_ARG_NONE, &version, "Show version information", NULL },
         { "account", 'a', 0, G_OPTION_ARG_STRING, &account_name, "Auto connect to an account on startup" },
-        { "log",'l', 0, G_OPTION_ARG_STRING, &log, "Set logging levels, DEBUG, INFO (default), WARN, ERROR", "LEVEL" },
-        { "config",'c', 0, G_OPTION_ARG_STRING, &config_file, "Use an alternative configuration file", NULL },
+        { "log", 'l', 0, G_OPTION_ARG_STRING, &log, "Set logging levels, DEBUG, INFO (default), WARN, ERROR", "LEVEL" },
+        { "config", 'c', 0, G_OPTION_ARG_STRING, &config_file, "Use an alternative configuration file", NULL },
+        { "logfile", 'f', 0, G_OPTION_ARG_STRING, &log_file, "Specify log filename", NULL },
         { NULL }
     };
 
@@ -173,7 +175,7 @@ main(int argc, char **argv)
         return 0;
     }
 
-    prof_run(log, account_name, config_file);
+    prof_run(log, account_name, config_file, log_file);
 
     return 0;
 }

src/profanity.c

@@ -86,7 +86,7 @@
 #include "omemo/omemo.h"
 #endif
 
-static void _init(char *log_level, char *config_file);
+static void _init(char *log_level, char *config_file, char *log_file);
 static void _shutdown(void);
 static void _connect_default(const char * const account);
 
@@ -94,9 +94,9 @@ static gboolean cont = TRUE;
 static gboolean force_quit = FALSE;
 
 void
-prof_run(char *log_level, char *account_name, char *config_file)
+prof_run(char *log_level, char *account_name, char *config_file, char *log_file)
 {
-    _init(log_level, config_file);
+    _init(log_level, config_file, log_file);
     plugins_on_start();
     _connect_default(account_name);
 
@@ -157,7 +157,7 @@ _connect_default(const char *const account)
 }
 
 static void
-_init(char *log_level, char *config_file)
+_init(char *log_level, char *config_file, char *log_file)
 {
     setlocale(LC_ALL, "");
     // ignore SIGPIPE
@@ -173,7 +173,7 @@ _init(char *log_level, char *config_file)
     files_create_directories();
     log_level_t prof_log_level = log_level_from_string(log_level);
     prefs_load(config_file);
-    log_init(prof_log_level);
+    log_init(prof_log_level, log_file);
     log_stderr_init(PROF_LEVEL_ERROR);
     if (strcmp(PACKAGE_STATUS, "development") == 0) {
 #ifdef HAVE_GIT_VERSION

src/profanity.h

@@ -40,7 +40,7 @@
 #include <pthread.h>
 #include <glib.h>
 
-void prof_run(char *log_level, char *account_name, char * config_file);
+void prof_run(char *log_level, char *account_name, char *config_file, char *log_file);
 void prof_set_quit(void);
 
 pthread_mutex_t lock;