Use const char* instead of char*.

Reduce the number of warnings with -Wwrite-strings.
* src/xrdb.c (get_environ_db, get_system_name):
* src/unexelf.c (find_section):
* src/term.c (string_cost, string_cost_one_line, per_line_cost)
(get_named_tty, init_tty):
* src/sysdep.c (sys_subshell):
* src/sound.c (sound_perror, sound_warning, vox_open, vox_init)
(alsa_sound_perror, alsa_open, alsa_configure, alsa_init):
* src/search.c (Freplace_match):
* src/process.c (Fmake_network_process, send_process, init_process):
* src/lread.c (Fload, init_lread):
* src/keymap.c (Fdescribe_buffer_bindings, describe_map_tree):
* src/keyboard.c (parse_tool_bar_item, struct event_head):
* src/gtkutil.h (xg_get_font_name):
* src/gtkutil.c (get_dialog_title, create_dialog, xg_get_font_name)
(make_widget_for_menu_item, make_menu_item, create_menus)
(xg_make_tool_item):
* src/font.c (parse_matrix, font_parse_name):
* src/floatfns.c (rounding_driver, float_error_fn_name):
* src/filelock.c (get_boot_time_1, lock_file_1):
* src/fileio.c (barf_or_query_if_file_exists, check_writable):
* src/editfns.c (get_system_name, get_operating_system_release)
(Fencode_time, Fset_time_zone_rule):
* src/dispextern.h (string_cost, per_line_cost, get_named_tty, init_tty):
* src/buffer.c (defvar_per_buffer): Use const.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/filelock.c b/src/filelock.c
index 25ca23fdee4..15ed546bc50 100644
--- a/src/filelock.c
+++ b/src/filelock.c
@@ -118,7 +118,7 @@ static time_t boot_time;
 static int boot_time_initialized;
 
 #ifdef BOOT_TIME
-static void get_boot_time_1 (char *, int);
+static void get_boot_time_1 (const char *, int);
 #endif
 
 static time_t
@@ -249,7 +249,7 @@ get_boot_time (void)
    Success is indicated by setting BOOT_TIME to a larger value.  */
 
 void
-get_boot_time_1 (char *filename, int newest)
+get_boot_time_1 (const char *filename, int newest)
 {
   struct utmp ut, *utp;
   int desc;
@@ -360,8 +360,8 @@ lock_file_1 (char *lfname, int force)
 {
   register int err;
   time_t boot_time;
-  char *user_name;
-  char *host_name;
+  const char *user_name;
+  const char *host_name;
   char *lock_info_str;
 
   /* Call this first because it can GC.  */