Add -replace option

Issue: #568

doc/rofi.1

@@ -1017,6 +1017,12 @@ Command to open a Desktop Entry that is a Link.
 .PP
 Make \fBrofi\fP create a pid file and check this on startup. The pid file prevents multiple \fBrofi\fP instances from running simultaneously. This is useful when running \fBrofi\fP from a key\-binding daemon.
 
+.PP
+\fB\fC\-replace\fR
+
+.PP
+If rofi is already running, based on pid file, try to kill that instance.
+
 .PP
 \fB\fC\-display\-{mode}\fR \fIstring\fP
 

doc/rofi.1.markdown

@@ -617,6 +617,10 @@ Command to open a Desktop Entry that is a Link.
 
 Make **rofi** create a pid file and check this on startup. The pid file prevents multiple **rofi** instances from running simultaneously. This is useful when running **rofi** from a key-binding daemon.
 
+`-replace`
+
+If rofi is already running, based on pid file, try to kill that instance.
+
 `-display-{mode}` *string*
 
 Set the name to use for mode. This is used as prompt and in combi-browser.

include/helper.h

@@ -149,10 +149,11 @@ int execute_generator(const char *cmd) __attribute__((nonnull));
 
 /**
  * @param pidfile The pidfile to create.
+ * @param kill Try killing running instance.
  *
  * returns file descriptor (or -1 when failed)
  */
-int create_pid_file(const char *pidfile);
+int create_pid_file(const char *pidfile, gboolean kill);
 
 /**
  * Remove pid file

source/helper.c

@@ -536,7 +536,7 @@ int execute_generator(const char *cmd) {
   return fd;
 }
 
-int create_pid_file(const char *pidfile) {
+int create_pid_file(const char *pidfile, gboolean kill_running) {
   if (pidfile == NULL) {
     return -1;
   }
@@ -559,6 +559,26 @@ int create_pid_file(const char *pidfile) {
   if (retv != 0) {
     g_warning("Failed to set lock on pidfile: Rofi already running?");
     g_warning("Got error: %d %s", retv, g_strerror(errno));
+    if (kill_running) {
+      char buffer[64] = {
+          0,
+      };
+      ssize_t l = read(fd, &buffer, 64);
+      if (l > 1) {
+        pid_t pid = g_ascii_strtoll(buffer, NULL, 0);
+        kill(pid, SIGTERM);
+        while (1) {
+          retv = flock(fd, LOCK_EX | LOCK_NB);
+          if (retv == 0) {
+            break;
+          }
+          g_usleep(100);
+        }
+      }
+      remove_pid_file(fd);
+      return create_pid_file(pidfile, FALSE);
+    }
+
     remove_pid_file(fd);
     return -1;
   }
@@ -1263,10 +1283,10 @@ char *helper_string_replace_if_exists(char *string, ...) {
  * @param h      Hash table with set of {key}, value that will be replaced,
  * terminated by  a NULL
  *
- * Items {key} are replaced by the value if '{key}' is passed as key/value pair,
- * otherwise removed from string. If the {key} is in between []  all the text
- * between [] are removed if {key} is not found. Otherwise key is replaced and [
- * & ] removed.
+ * Items {key} are replaced by the value if '{key}' is passed as key/value
+ * pair, otherwise removed from string. If the {key} is in between []  all the
+ * text between [] are removed if {key} is not found. Otherwise key is
+ * replaced and [ & ] removed.
  *
  * This allows for optional replacement, f.e.   '{ssh-client} [-t  {title}] -e
  * "{cmd}"' the '-t {title}' is only there if {title} is set.

source/rofi.c

@@ -1047,8 +1047,12 @@ int main(int argc, char *argv[]) {
   rofi_icon_fetcher_init();
   TICK_N("Icon fetcher initialize");
 
+  gboolean kill_running = FALSE;
+  if (find_arg("-replace") >= 0) {
+    kill_running = TRUE;
+  }
   // Create pid file
-  int pfd = create_pid_file(pidfile);
+  int pfd = create_pid_file(pidfile, kill_running);
   TICK_N("Pid file created");
   if (pfd < 0) {
     cleanup();

source/xrmoptions.c

@@ -701,7 +701,7 @@ gboolean config_parse_set_property(const Property *p, char **error) {
     }
   }
   //*error = g_strdup_printf("Option: %s is not found.", p->name);
-  g_warning("Option: %s is not found.", p->name);
+  g_debug("Option: %s is not found.", p->name);
 
   for (GList *iter = g_list_first(extra_parsed_options); iter != NULL;
        iter = g_list_next(iter)) {

test/helper-pidfile.c

@@ -25,104 +25,81 @@
  *
  */
 
-#include <assert.h>
-#include <locale.h>
-#include <glib.h>
-#include <stdio.h>
-#include <helper.h>
-#include <string.h>
-#include <xcb/xcb_ewmh.h>
 #include "display.h"
-#include "xcb.h"
-#include "xcb-internal.h"
+#include "rofi-icon-fetcher.h"
 #include "rofi.h"
 #include "settings.h"
 #include "widgets/textbox.h"
-#include "rofi-icon-fetcher.h"
+#include "xcb-internal.h"
+#include "xcb.h"
+#include <assert.h>
+#include <glib.h>
+#include <helper.h>
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <xcb/xcb_ewmh.h>
 
 static int test = 0;
 
-#define TASSERT( a )        {                            \
-        assert ( a );                                    \
-        printf ( "Test %i passed (%s)\n", ++test, # a ); \
-}
+#define TASSERT(a)                                                             \
+  {                                                                            \
+    assert(a);                                                                 \
+    printf("Test %i passed (%s)\n", ++test, #a);                               \
+  }
 #include "theme.h"
 ThemeWidget *rofi_theme = NULL;
 
-uint32_t rofi_icon_fetcher_query ( const char *name, const int size )
-{
-  return 0;
-}
-uint32_t rofi_icon_fetcher_query_advanced ( const char *name, const int wsize, const int hsize )
-{
+uint32_t rofi_icon_fetcher_query(const char *name, const int size) { return 0; }
+uint32_t rofi_icon_fetcher_query_advanced(const char *name, const int wsize,
+                                          const int hsize) {
   return 0;
 }
 
-cairo_surface_t * rofi_icon_fetcher_get ( const uint32_t uid )
-{
-  return NULL;
-}
+cairo_surface_t *rofi_icon_fetcher_get(const uint32_t uid) { return NULL; }
 
-void rofi_clear_error_messages ( void )
-{
-}
+void rofi_clear_error_messages(void) {}
 
-gboolean rofi_theme_parse_string ( const char *string )
-{
-  return FALSE;
+gboolean rofi_theme_parse_string(const char *string) { return FALSE; }
+double textbox_get_estimated_char_height(void) { return 12.0; }
+void rofi_view_get_current_monitor(int *width, int *height) {
+  *width = 1920;
+  *height = 1080;
 }
-double textbox_get_estimated_char_height ( void )
-{
-  return 12.0;
-}
-void rofi_view_get_current_monitor ( int *width, int *height )
-{
-*width = 1920;
-*height = 1080;
-}
-double textbox_get_estimated_ch ( void )
-{
-  return 9.0;
-}
-void rofi_add_error_message ( G_GNUC_UNUSED GString *msg )
-{
-}
-int rofi_view_error_dialog ( const char *msg, G_GNUC_UNUSED int markup )
-{
-    fputs ( msg, stderr );
+double textbox_get_estimated_ch(void) { return 9.0; }
+void rofi_add_error_message(G_GNUC_UNUSED GString *msg) {}
+int rofi_view_error_dialog(const char *msg, G_GNUC_UNUSED int markup) {
+  fputs(msg, stderr);
   return TRUE;
 }
-int monitor_active ( G_GNUC_UNUSED workarea *mon )
-{
-    return 0;
-}
+int monitor_active(G_GNUC_UNUSED workarea *mon) { return 0; }
 
-void display_startup_notification ( G_GNUC_UNUSED RofiHelperExecuteContext *context, G_GNUC_UNUSED GSpawnChildSetupFunc *child_setup, G_GNUC_UNUSED gpointer *user_data )
-{
-}
+void display_startup_notification(
+    G_GNUC_UNUSED RofiHelperExecuteContext *context,
+    G_GNUC_UNUSED GSpawnChildSetupFunc *child_setup,
+    G_GNUC_UNUSED gpointer *user_data) {}
 
-int main ( G_GNUC_UNUSED int argc, G_GNUC_UNUSED char **argv )
-{
-    if ( setlocale ( LC_ALL, "" ) == NULL ) {
-        fprintf ( stderr, "Failed to set locale.\n" );
+int main(G_GNUC_UNUSED int argc, G_GNUC_UNUSED char **argv) {
+  if (setlocale(LC_ALL, "") == NULL) {
+    fprintf(stderr, "Failed to set locale.\n");
     return EXIT_FAILURE;
   }
   // Pid test.
-    // Tests basic functionality of writing it, locking, seeing if I can write same again
-    // And close/reopen it again.
+  // Tests basic functionality of writing it, locking, seeing if I can write
+  // same again And close/reopen it again.
   {
-        const char *tmpd = g_get_tmp_dir ();
-        char *path = g_build_filename (tmpd, "rofi-pid.pid", NULL);
-        TASSERT ( create_pid_file ( NULL ) == -1 );
-        int fd = create_pid_file ( path );
-        TASSERT ( fd >= 0 );
-        int fd2 = create_pid_file ( path );
-        TASSERT ( fd2 <  0 );
+    const char *tmpd = g_get_tmp_dir();
+    char *path = g_build_filename(tmpd, "rofi-pid.pid", NULL);
+    TASSERT(create_pid_file(NULL, FALSE) == -1);
+    int fd = create_pid_file(path, FALSE);
+    TASSERT(fd >= 0);
+    int fd2 = create_pid_file(path, FALSE);
+    TASSERT(fd2 < 0);
 
-        remove_pid_file ( fd );
-        fd = create_pid_file ( path );
-        TASSERT ( fd >= 0 );
-        remove_pid_file ( fd );
-        free ( path );
+    remove_pid_file(fd);
+    fd = create_pid_file(path, FALSE);
+    TASSERT(fd >= 0);
+    remove_pid_file(fd);
+    free(path);
   }
 }