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, 11 insertions, 11 deletions

diff --git a/src/sound.c b/src/sound.c
index 2b23ae400a7..55804c328a8 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -115,10 +115,10 @@ enum sound_attr
 };
 
 #ifdef HAVE_ALSA
-static void alsa_sound_perror (char *, int) NO_RETURN;
+static void alsa_sound_perror (const char *, int) NO_RETURN;
 #endif
-static void sound_perror (char *) NO_RETURN;
-static void sound_warning (char *);
+static void sound_perror (const char *) NO_RETURN;
+static void sound_warning (const char *);
 static int parse_sound (Lisp_Object, Lisp_Object *);
 
 /* END: Common Definitions */
@@ -329,7 +329,7 @@ static int do_play_sound (const char *, unsigned long);
 /* Like perror, but signals an error.  */
 
 static void
-sound_perror (char *msg)
+sound_perror (const char *msg)
 {
   int saved_errno = errno;
 
@@ -347,7 +347,7 @@ sound_perror (char *msg)
 /* Display a warning message.  */
 
 static void
-sound_warning (char *msg)
+sound_warning (const char *msg)
 {
   message (msg);
 }
@@ -727,7 +727,7 @@ au_play (struct sound *s, struct sound_device *sd)
 static void
 vox_open (struct sound_device *sd)
 {
-  char *file;
+  const char *file;
 
   /* Open the sound device.  Default is /dev/dsp.  */
   if (sd->file)
@@ -872,7 +872,7 @@ vox_choose_format (struct sound_device *sd, struct sound *s)
 static int
 vox_init (struct sound_device *sd)
 {
-  char *file;
+  const char *file;
   int fd;
 
   /* Open the sound device.  Default is /dev/dsp.  */
@@ -915,7 +915,7 @@ vox_write (struct sound_device *sd, const char *buffer, int nbytes)
 /* This driver is available on GNU/Linux. */
 
 static void
-alsa_sound_perror (char *msg, int err)
+alsa_sound_perror (const char *msg, int err)
 {
   error ("%s: %s", msg, snd_strerror (err));
 }
@@ -934,7 +934,7 @@ struct alsa_params
 static void
 alsa_open (struct sound_device *sd)
 {
-  char *file;
+  const char *file;
   struct alsa_params *p;
   int err;
 
@@ -1056,7 +1056,7 @@ alsa_configure (struct sound_device *sd)
       int chn;
       snd_mixer_t *handle;
       snd_mixer_elem_t *e;
-      char *file = sd->file ? sd->file : DEFAULT_ALSA_SOUND_DEVICE;
+      const char *file = sd->file ? sd->file : DEFAULT_ALSA_SOUND_DEVICE;
 
       if (snd_mixer_open (&handle, 0) >= 0)
         {
@@ -1220,7 +1220,7 @@ snd_error_quiet (const char *file, int line, const char *function, int err,
 static int
 alsa_init (struct sound_device *sd)
 {
-  char *file;
+  const char *file;
   snd_pcm_t *handle;
   int err;