coverity: improper use of negative value

common/trans.c

@@ -501,12 +501,18 @@ trans_connect(struct trans *self, const char *server, const char *port,
     if (self->mode == TRANS_MODE_TCP) /* tcp */
     {
         self->sck = g_tcp_socket();
+        if (self->sck < 0)
+            return 1;
+
         g_tcp_set_non_blocking(self->sck);
         error = g_tcp_connect(self->sck, server, port);
     }
     else if (self->mode == TRANS_MODE_UNIX) /* unix socket */
     {
         self->sck = g_tcp_local_socket();
+        if (self->sck < 0)
+            return 1;
+
         g_tcp_set_non_blocking(self->sck);
         error = g_tcp_local_connect(self->sck, port);
     }
@@ -537,6 +543,10 @@ trans_connect(struct trans *self, const char *server, const char *port,
 }
 
 /*****************************************************************************/
+
+/**
+ * @return 0 on success, 1 on failure
+ */
 int APP_CC
 trans_listen_address(struct trans *self, char *port, const char *address)
 {
@@ -548,6 +558,9 @@ trans_listen_address(struct trans *self, char *port, const char *address)
     if (self->mode == TRANS_MODE_TCP) /* tcp */
     {
         self->sck = g_tcp_socket();
+        if (self->sck < 0)
+            return 1;
+
         g_tcp_set_non_blocking(self->sck);
 
         if (g_tcp_bind_address(self->sck, port, address) == 0)
@@ -565,7 +578,11 @@ trans_listen_address(struct trans *self, char *port, const char *address)
         g_free(self->listen_filename);
         self->listen_filename = 0;
         g_file_delete(port);
+
         self->sck = g_tcp_local_socket();
+        if (self->sck < 0)
+            return 1;
+
         g_tcp_set_non_blocking(self->sck);
 
         if (g_tcp_local_bind(self->sck, port) == 0)

rdp/rdp_rdp.c

@@ -1170,6 +1170,9 @@ rdp_rec_check_file(struct rdp_rdp *self)
         }
 
         self->rec_fd = g_file_open(file_name);
+        if (self->rec_fd < 0)
+            return 1;
+
         make_stream(s);
         init_stream(s, 8192);
         out_uint8a(s, "XRDPREC1", 8);

rdp/rdp_tcp.c

@@ -157,7 +157,10 @@ int APP_CC
 rdp_tcp_connect(struct rdp_tcp *self, char *ip, char *port)
 {
     DEBUG(("    in rdp_tcp_connect ip %s port %s", ip, port));
+
     self->sck = g_tcp_socket();
+    if (self->sck < 0)
+        return 1;
 
     if (g_tcp_connect(self->sck, ip, port) == 0)
     {

sesman/sesman.c

@@ -54,7 +54,14 @@ sesman_main_loop(void)
 
     /*main program loop*/
     log_message(LOG_LEVEL_INFO, "listening...");
+
     g_sck = g_tcp_socket();
+    if (g_sck < 0)
+    {
+        log_message(LOG_LEVEL_ERROR, "error opening socket, g_tcp_socket() failed...");
+        return 1;
+    }
+
     g_tcp_set_non_blocking(g_sck);
     error = scp_tcp_bind(g_sck, g_cfg->listen_address, g_cfg->listen_port);
 
@@ -132,6 +139,7 @@ sesman_main_loop(void)
                     g_get_errno(), g_get_strerror());
     }
 
+    if (g_sck != -1)
         g_tcp_close(g_sck);
 }
 

sesman/session.c

@@ -203,27 +203,33 @@ x_server_running_check_ports(int display)
 
     if (!x_running) /* check 59xx */
     {
-        sck = g_tcp_socket();
+        if ((sck = g_tcp_socket()) != -1)
+        {
             g_sprintf(text, "59%2.2d", display);
             x_running = g_tcp_bind(sck, text);
             g_tcp_close(sck);
         }
+    }
 
     if (!x_running) /* check 60xx */
     {
-        sck = g_tcp_socket();
+        if ((sck = g_tcp_socket()) != -1)
+        {
             g_sprintf(text, "60%2.2d", display);
             x_running = g_tcp_bind(sck, text);
             g_tcp_close(sck);
         }
+    }
 
     if (!x_running) /* check 62xx */
     {
-        sck = g_tcp_socket();
+        if ((sck = g_tcp_socket()) != -1)
+        {
             g_sprintf(text, "62%2.2d", display);
             x_running = g_tcp_bind(sck, text);
             g_tcp_close(sck);
         }
+    }
 
     return x_running;
 }

sesman/tools/sesadmin.c

@@ -107,6 +107,12 @@ int main(int argc, char **argv)
     scp_init(&logging);
 
     sock = g_tcp_socket();
+    if (sock < 0)
+    {
+        LOG_DBG("Socket open error, g_tcp_socket() failed\n");
+        return 1;
+    }
+
     s = scp_session_create();
     c = scp_connection_create(sock);
 

sesman/tools/sesrun.c

@@ -75,7 +75,10 @@ main(int argc, char **argv)
         init_stream(in_s, 8192);
         make_stream(out_s);
         init_stream(out_s, 8192);
+
         sck = g_tcp_socket();
+        if (sck < 0)
+            return 1;
 
         if (g_tcp_connect(sck, argv[1], g_cfg.listen_port) == 0)
         {

sesman/tools/sestest.c

@@ -38,6 +38,9 @@ int main(int argc, char **argv)
     scp_init(&log);
 
     sock = g_tcp_socket();
+    if (sock < 0)
+        return 1;
+
     s = scp_session_create();
     c = scp_connection_create(sock);
 

vnc/vnc.c

@@ -967,7 +967,14 @@ lib_mod_connect(struct vnc *v)
     make_stream(s);
     g_sprintf(con_port, "%s", v->port);
     make_stream(pixel_format);
+
     v->sck = g_tcp_socket();
+    if (v->sck < 0)
+    {
+        v->server_msg(v, "VNC error: socket create error, g_tcp_socket() failed", 0);
+        return 1;
+    }
+
     v->sck_obj = g_create_wait_obj_from_socket(v->sck, 0);
     v->sck_closed = 0;
     g_sprintf(text, "VNC connecting to %s %s", v->ip, con_port);

xrdp/xrdp_listen.c

@@ -244,6 +244,7 @@ xrdp_listen_get_port_address(char *port, int port_bytes,
         list_delete(values);
     }
 
+    if (fd != -1)
         g_file_close(fd);
 
     /* startup_param overrides */

xrdp/xrdp_login_wnd.c

@@ -459,9 +459,10 @@ xrdp_wm_login_fill_in_combo(struct xrdp_wm *self, struct xrdp_bitmap *b)
     g_snprintf(cfg_file, 255, "%s/xrdp.ini", XRDP_CFG_PATH);
     fd = g_file_open(cfg_file); /* xrdp.ini */
 
-    if (fd < 1)
+    if (fd < 0)
     {
         log_message(LOG_LEVEL_ERROR, "Could not read xrdp ini file %s", cfg_file);
+        return 1;
     }
 
     file_read_sections(fd, sections);

xrdp/xrdp_mm.c

@@ -1309,7 +1309,9 @@ xrdp_mm_get_sesman_port(char *port, int port_bytes)
         list_delete(values);
     }
 
+    if (fd != -1)
         g_file_close(fd);
+
     return 0;
 }
 

xup/xup.c

@@ -212,10 +212,15 @@ lib_mod_connect(struct mod *mod)
         if (use_uds)
         {
             mod->sck = g_tcp_local_socket();
+            if (mod->sck < 0)
+                return 1;
         }
         else
         {
             mod->sck = g_tcp_socket();
+            if (mod->sck < 0)
+                return 1;
+
             g_tcp_set_non_blocking(mod->sck);
             g_tcp_set_no_delay(mod->sck);
         }