cli: don't use global variable nm_cli in nmc_terminal_spawn_pager()

print_required_fields() still accesses the global variable.
We can only move the uses of globals up the call-stack, one
bit at a time.

clients/cli/connections.c

@@ -1988,8 +1988,7 @@ do_connections_show (NmCli *nmc, int argc, char **argv)
 			}
 		}
 
-		/* Optionally start paging the output. */
-		nmc_terminal_spawn_pager (&nmc->nmc_config);
+		nm_cli_spawn_pager (nmc);
 
 		items = con_show_get_items (nmc, active_only, show_active_fields, order);
 		g_ptr_array_add (items, NULL);

clients/cli/general.c

@@ -546,8 +546,7 @@ print_permissions (void *user_data)
 		permissions[i++] = GINT_TO_POINTER (perm);
 	permissions[i++] = NULL;
 
-	/* Optionally start paging the output. */
-	nmc_terminal_spawn_pager (&nmc->nmc_config);
+	nm_cli_spawn_pager (nmc);
 
 	if (!nmc_print (&nmc->nmc_config,
 	                permissions,
@@ -1270,8 +1269,7 @@ do_overview (NmCli *nmc, int argc, char **argv)
 	/* Register polkit agent */
 	nmc_start_polkit_agent_start_try (nmc);
 
-	/* Optionally start paging the output. */
-	nmc_terminal_spawn_pager (&nmc->nmc_config);
+	nm_cli_spawn_pager (nmc);
 
 	/* The VPN connections don't have devices (yet?). */
 	p = nm_client_get_active_connections (nmc->client);

clients/cli/nmcli.c

@@ -998,6 +998,14 @@ nmc_value_transforms_register (void)
 	                                 nmc_convert_bytes_to_string);
 }
 
+void
+nm_cli_spawn_pager (NmCli *nmc)
+{
+	if (nmc->pager_pid > 0)
+		return;
+	nmc->pager_pid = nmc_terminal_spawn_pager (&nmc->nmc_config);
+}
+
 static void
 nmc_cleanup (NmCli *nmc)
 {

clients/cli/nmcli.h

@@ -167,6 +167,8 @@ void     nmc_clear_sigint (void);
 void     nmc_set_sigquit_internal (void);
 void     nmc_exit (void);
 
+void nm_cli_spawn_pager (NmCli *nmc);
+
 void nmc_empty_output_fields (NmcOutputData *output_data);
 
 #define NMC_OUTPUT_DATA_DEFINE_SCOPED(out) \

clients/cli/utils.c

@@ -36,6 +36,7 @@
 #include "nm-meta-setting-access.h"
 
 #include "common.h"
+#include "nmcli.h"
 #include "settings.h"
 
 #define ML_HEADER_WIDTH 79
@@ -1445,38 +1446,38 @@ pager_fallback (void)
 	_exit(EXIT_SUCCESS);
 }
 
-void
+pid_t
 nmc_terminal_spawn_pager (const NmcConfig *nmc_config)
 {
 	const char *pager = getenv ("PAGER");
+	pid_t pager_pid;
 	pid_t parent_pid;
 	int fd[2];
 
-	if (   nm_cli.nmc_config.in_editor
-	    || nm_cli.pager_pid > 0
+	if (   nmc_config->in_editor
 	    || nmc_config->print_output == NMC_PRINT_TERSE
 	    || !nmc_config->use_colors
 	    || g_strcmp0 (pager, "") == 0
 	    || getauxval (AT_SECURE))
-		return;
+		return 0;
 
 	if (pipe (fd) == -1) {
 		g_printerr (_("Failed to create pager pipe: %s\n"), strerror (errno));
-		return;
+		return 0;
 	}
 
 	parent_pid = getpid ();
 
-	nm_cli.pager_pid = fork ();
-	if (nm_cli.pager_pid == -1) {
+	pager_pid = fork ();
+	if (pager_pid == -1) {
 		g_printerr (_("Failed to fork pager: %s\n"), strerror (errno));
 		nm_close (fd[0]);
 		nm_close (fd[1]);
-		return;
+		return 0;
 	}
 
 	/* In the child start the pager */
-	if (nm_cli.pager_pid == 0) {
+	if (pager_pid == 0) {
 		dup2 (fd[0], STDIN_FILENO);
 		nm_close (fd[0]);
 		nm_close (fd[1]);
@@ -1521,6 +1522,7 @@ nmc_terminal_spawn_pager (const NmcConfig *nmc_config)
 
 	nm_close (fd[0]);
 	nm_close (fd[1]);
+	return pager_pid;
 }
 
 /*****************************************************************************/
@@ -1587,8 +1589,7 @@ print_required_fields (const NmcConfig *nmc_config,
 	gboolean field_names = of_flags & NMC_OF_FLAG_FIELD_NAMES;
 	gboolean section_prefix = of_flags & NMC_OF_FLAG_SECTION_PREFIX;
 
-	/* Optionally start paging the output. */
-	nmc_terminal_spawn_pager (nmc_config);
+	nm_cli_spawn_pager (&nm_cli);
 
 	/* --- Main header --- */
 	if (   nmc_config->print_output == NMC_PRINT_PRETTY

clients/cli/utils.h

@@ -40,7 +40,7 @@ gboolean nmc_parse_args (nmc_arg_t *arg_arr, gboolean last, int *argc, char ***a
 char *ssid_to_hex (const char *str, gsize len);
 void nmc_terminal_erase_line (void);
 void nmc_terminal_show_progress (const char *str);
-void nmc_terminal_spawn_pager (const NmcConfig *nmc_config);
+pid_t nmc_terminal_spawn_pager (const NmcConfig *nmc_config);
 char *nmc_colorize (const NmcConfig *nmc_config, NMMetaColor color, const char * fmt, ...)  _nm_printf (3, 4);
 void nmc_filter_out_colors_inplace (char *str);
 char *nmc_filter_out_colors (const char *str);