declare program_name consistently

* src/base64.c: Likewise.
* src/basename.c: Likewise.
* src/cat.c: Likewise.
* src/chcon.c: Likewise.
* src/chgrp.c: Likewise.
* src/chmod.c: Likewise.
* src/chown.c: Likewise.
* src/chroot.c: Likewise.
* src/cksum.c: Likewise.
* src/comm.c: Likewise.
* src/cp.c: Likewise.
* src/csplit.c: Likewise.
* src/cut.c: Likewise.
* src/date.c: Likewise.
* src/dd.c: Likewise.
* src/df.c: Likewise.
* src/dircolors.c: Likewise.
* src/dirname.c: Likewise.
* src/du.c: Likewise.
* src/echo.c: Likewise.
* src/env.c: Likewise.
* src/expand.c: Likewise.
* src/expr.c: Likewise.
* src/factor.c: Likewise.
* src/fmt.c: Likewise.
* src/fold.c: Likewise.
* src/groups.c: Likewise.
* src/head.c: Likewise.
* src/hostid.c: Likewise.
* src/hostname.c: Likewise.
* src/id.c: Likewise.
* src/install.c: Likewise.
* src/join.c: Likewise.
* src/kill.c: Likewise.
* src/link.c: Likewise.
* src/ln.c: Likewise.
* src/logname.c: Likewise.
* src/ls.c: Likewise.
* src/md5sum.c: Likewise.
* src/mkdir.c: Likewise.
* src/mkfifo.c: Likewise.
* src/mknod.c: Likewise.
* src/mktemp.c: Likewise.
* src/mv.c: Likewise.
* src/nice.c: Likewise.
* src/nl.c: Likewise.
* src/nohup.c: Likewise.
* src/od.c: Likewise.
* src/paste.c: Likewise.
* src/pathchk.c: Likewise.
* src/pinky.c: Likewise.
* src/pr.c: Likewise.
* src/printenv.c: Likewise.
* src/printf.c: Likewise.
* src/ptx.c: Likewise.
* src/pwd.c: Likewise.
* src/readlink.c: Likewise.
* src/rm.c: Likewise.
* src/rmdir.c: Likewise.
* src/runcon.c: Likewise.
* src/seq.c: Likewise.
* src/setuidgid.c: Likewise.
* src/shuf.c: Likewise.
* src/sleep.c: Likewise.
* src/sort.c: Likewise.
* src/split.c: Likewise.
* src/stat.c: Likewise.
* src/stty.c: Likewise.
* src/su.c: Likewise.
* src/sum.c: Likewise.
* src/sync.c: Likewise.
* src/tac.c: Likewise.
* src/tail.c: Likewise.
* src/tee.c: Likewise.
* src/test.c: Likewise.
* src/timeout.c: Likewise.
* src/touch.c: Likewise.
* src/tr.c: Likewise.
* src/true.c: Likewise.
* src/tsort.c: Likewise.
* src/tty.c: Likewise.
* src/uname.c: Likewise.
* src/unexpand.c: Likewise.
* src/uniq.c: Likewise.
* src/unlink.c: Likewise.
* src/uptime.c: Likewise.
* src/users.c: Likewise.
* src/wc.c: Likewise.
* src/who.c: Likewise.
* src/whoami.c: Likewise.
* src/yes.c: Likewise.

src/base64.c

@@ -38,7 +38,7 @@
 #define AUTHORS proper_name ("Simon Josefsson")
 
 /* The invocation name of this program.  */
-char *program_name;
+char const *program_name;
 
 static const struct option long_options[] = {
   {"decode", no_argument, 0, 'd'},

src/basename.c

@@ -40,7 +40,7 @@
 #define AUTHORS proper_name ("FIXME unknown")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/cat.c

@@ -52,7 +52,7 @@
 #define max(h,i) ((h) > (i) ? (h) : (i))
 
 /* Name under which this program was invoked.  */
-char *program_name;
+char const *program_name;
 
 /* Name of input file.  May be "-".  */
 static char const *infile;

src/chcon.c

@@ -56,7 +56,7 @@ enum Verbosity
 };
 
 /* The name the program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If nonzero, and the systems has support for it, change the context
    of symbolic links rather than any files they point to.  */

src/chgrp.c

@@ -43,7 +43,7 @@
 #endif
 
 /* The name the program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The argument to the --reference option.  Use the group ID of this file.
    This file must exist.  */

src/chmod.c

@@ -59,7 +59,7 @@ enum Verbosity
 };
 
 /* The name the program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The desired change to the mode.  */
 static struct mode_change *change;

src/chown.c

@@ -48,7 +48,7 @@
   proper_name ("Jim Meyering")
 
 /* The name the program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The argument to the --reference option.  Use the owner and group IDs
    of this file.  This file must exist.  */

src/chroot.c

@@ -33,7 +33,7 @@
 #define AUTHORS proper_name ("Roland McGrath")
 
 /* The name this program was run with, for error messages. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/cksum.c

@@ -114,7 +114,7 @@ main (void)
 # define BUFLEN (1 << 16)
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 static uint_fast32_t const crctab[256] =
 {

src/comm.c

@@ -40,7 +40,7 @@
 #define min(x, y) ((x) < (y) ? (x) : (y))
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* True if the LC_COLLATE locale is hard.  */
 static bool hard_LC_COLLATE;

src/cp.c

@@ -89,7 +89,7 @@ enum
 #define INITIAL_ENTRY_TAB_SIZE 70
 
 /* The invocation name of this program.  */
-char *program_name;
+char const *program_name;
 
 /* True if the kernel is SELinux enabled.  */
 static bool selinux_enabled;

src/csplit.c

@@ -129,7 +129,7 @@ static void save_line_to_file (const struct cstring *line);
 void usage (int status);
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Start of buffer list. */
 static struct buffer_record *head = NULL;

src/cut.c

@@ -121,7 +121,7 @@ enum operating_mode
   };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static enum operating_mode operating_mode;
 

src/date.c

@@ -78,7 +78,7 @@ ARGMATCH_VERIFY (time_spec_string, time_spec);
 static char const rfc_2822_format[] = "%a, %d %b %Y %H:%M:%S %z";
 
 /* The name this program was run with, for error messages. */
-char *program_name;
+char const *program_name;
 
 /* For long options that have no equivalent short option, use a
    non-character as a pseudo short option, starting with CHAR_MAX + 1.  */

src/dd.c

@@ -129,7 +129,7 @@ enum
   };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The name of the input file, or NULL for the standard input. */
 static char const *input_file = NULL;

src/df.c

@@ -43,7 +43,7 @@
   proper_name ("Paul Eggert")
 
 /* Name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If true, show inode information. */
 static bool inode_format;

src/dircolors.c

@@ -87,7 +87,7 @@ static struct option const long_options[] =
     {NULL, 0, NULL, 0}
   };
 
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/dirname.c

@@ -36,7 +36,7 @@
   proper_name ("Jim Meyering")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/du.c

@@ -127,7 +127,7 @@ struct dulevel
 };
 
 /* Name under which this program was invoked.  */
-char *program_name;
+char const *program_name;
 
 /* If true, display counts for all files, not just directories.  */
 static bool opt_all = false;

src/echo.c

@@ -51,7 +51,7 @@ enum { DEFAULT_ECHO_TO_XPG = false };
 #endif
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/env.c

@@ -97,7 +97,7 @@ int putenv ();
 extern char **environ;
 
 /* The name by which this program was run. */
-char *program_name;
+char const *program_name;
 
 static struct option const longopts[] =
 {

src/expand.c

@@ -52,7 +52,7 @@
 #define OUTPUT_BLOCK 256
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* If true, convert blanks even after nonblank characters have been
    read on the line.  */

src/expr.c

@@ -82,7 +82,7 @@ typedef struct valinfo VALUE;
 static char **args;
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static VALUE *eval (bool);
 static bool nomoreargs (void);

src/factor.c

@@ -60,7 +60,7 @@ static const unsigned char wheel_tab[] =
 #define WHEEL_END (wheel_tab + (sizeof wheel_tab / sizeof wheel_tab[0]))
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/fmt.c

@@ -168,7 +168,7 @@ static void put_word (WORD *w);
 static void put_space (int space);
 
 /* The name this program was run with.  */
-const char *program_name;
+char const *program_name;
 
 /* Option values.  */
 

src/fold.c

@@ -35,7 +35,7 @@
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If nonzero, try to break on whitespace. */
 static bool break_spaces;

src/groups.c

@@ -30,7 +30,7 @@
 #include "group-list.h"
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The official name of this program (e.g., no `g' prefix).  */
 #define PROGRAM_NAME "groups"

src/head.c

@@ -65,7 +65,7 @@ enum header_mode
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Have we ever read standard input?  */
 static bool have_read_stdin;

src/hostid.c

@@ -34,7 +34,7 @@
 #define AUTHORS proper_name ("Jim Meyering")
 
 /* The name this program was run with, for error messages. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/hostname.c

@@ -51,7 +51,7 @@ sethostname (char *name, size_t namelen)
 #endif
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/id.c

@@ -45,7 +45,7 @@ static void print_user (uid_t uid);
 static void print_full_info (const char *username);
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If true, output user/group name instead of ID number. -n */
 static bool use_name = false;

src/install.c

@@ -93,7 +93,7 @@ static int make_ancestor (char const *dir, char const *component,
 void usage (int status);
 
 /* The name this program was run with, for error messages. */
-char *program_name;
+char const *program_name;
 
 /* The user name that will own the files, or NULL to make the owner
    the current user ID. */

src/join.c

@@ -80,7 +80,7 @@ struct seq
   };
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* The previous line read from each file. */
 static struct line *prevline[2];

src/kill.c

@@ -61,7 +61,7 @@
 #endif
 
 /* The name this program was run with, for error messages.  */
-char *program_name;
+char const *program_name;
 
 static char const short_options[] =
   "0::1::2::3::4::5::6::7::8::9::"

src/link.c

@@ -36,7 +36,7 @@
 #define AUTHORS proper_name ("Michael Stone")
 
 /* Name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/ln.c

@@ -58,7 +58,7 @@
 #endif
 
 /* The name by which the program was run, for error messages.  */
-char *program_name;
+char const *program_name;
 
 /* FIXME: document */
 static enum backup_type backup_type;

src/logname.c

@@ -30,7 +30,7 @@
 #define AUTHORS proper_name ("FIXME: unknown")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/ls.c

@@ -245,7 +245,7 @@ static void parse_ls_color (void);
 void usage (int status);
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* Initial size of hash table.
    Most hierarchies are likely to be shallower than this.  */

src/md5sum.c

@@ -121,7 +121,7 @@ static bool warn = false;
 static bool quiet = false;
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* For long options that have no equivalent short option, use a
    non-character as a pseudo short option, starting with CHAR_MAX + 1.  */

src/mkdir.c

@@ -37,7 +37,7 @@
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static struct option const longopts[] =
 {

src/mkfifo.c

@@ -33,7 +33,7 @@
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static struct option const longopts[] =
 {

src/mknod.c

@@ -34,7 +34,7 @@
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static struct option const longopts[] =
 {

src/mktemp.c

@@ -36,7 +36,7 @@
 static const char *default_template = "tmp.XXXXXXXXXX";
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* For long options that have no equivalent short option, use a
    non-character as a pseudo short option, starting with CHAR_MAX + 1.  */

src/mv.c

@@ -57,7 +57,7 @@ enum
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Remove any trailing slashes from each SOURCE argument.  */
 static bool remove_trailing_slashes;

src/nice.c

@@ -56,7 +56,7 @@
 #endif
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static struct option const longopts[] =
 {

src/nl.c

@@ -62,7 +62,7 @@ enum section
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Format of body lines (-b).  */
 static char const *body_type = "t";

src/nohup.c

@@ -43,7 +43,7 @@ enum
     NOHUP_FAILURE = 127
   };
 
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/od.c

@@ -114,7 +114,7 @@ struct tspec
   };
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* Convert the number of 8-bit bytes of a binary representation to
    the number of characters (digits + sign if the type is signed)

src/paste.c

@@ -55,7 +55,7 @@
 #define EMPTY_DELIM '\0'
 
 /* Name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If nonzero, we have read standard input at some point. */
 static bool have_read_stdin;

src/pathchk.c

@@ -72,7 +72,7 @@
 static bool validate_file_name (char *, bool, bool);
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* For long options that have no equivalent short option, use a
    non-character as a pseudo short option, starting with CHAR_MAX + 1.  */

src/pinky.c

@@ -45,7 +45,7 @@
 char *ttyname ();
 
 /* The name this program was run with. */
-const char *program_name;
+char const *program_name;
 
 /* If true, display the hours:minutes since each user has touched
    the keyboard, or blank if within the last minute, or days followed

src/pr.c

@@ -446,7 +446,7 @@ static void print_sep_string (void);
 static void separator_string (const char *optarg_S);
 
 /* The name under which this program was invoked. */
-char *program_name;
+char const *program_name;
 
 /* All of the columns to print.  */
 static COLUMN *column_vector;

src/printenv.c

@@ -46,7 +46,7 @@ enum { PRINTENV_FAILURE = 2 };
   proper_name ("Richard Mlynarik")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 extern char **environ;
 

src/printf.c

@@ -79,7 +79,7 @@ static char const *const cfcc_msg =
  N_("warning: %s: character(s) following character constant have been ignored");
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/ptx.c

@@ -69,7 +69,7 @@
 #define Sword 1
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Program options.  */
 

src/pwd.c

@@ -40,7 +40,7 @@ struct file_name
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/readlink.c

@@ -33,7 +33,7 @@
 #define AUTHORS proper_name ("Dmitry V. Levin")
 
 /* Name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* If true, do not output the trailing newline.  */
 static bool no_newline;

src/rm.c

@@ -67,7 +67,7 @@
   proper_name ("Jim Meyering")
 
 /* Name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* For long options that have no equivalent short option, use a
    non-character as a pseudo short option, starting with CHAR_MAX + 1.  */

src/rmdir.c

@@ -39,7 +39,7 @@
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If true, remove empty parent directories.  */
 static bool remove_empty_parents;

src/runcon.c

@@ -73,7 +73,7 @@ static struct option long_options[] = {
 };
 
 /* The name the program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/seq.c

@@ -44,7 +44,7 @@
 static bool equal_width;
 
 /* The name that this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* The string used to separate two numbers.  */
 static char const *separator;

src/setuidgid.c

@@ -39,7 +39,7 @@
 
 #define SETUIDGID_FAILURE 111
 
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/shuf.c

@@ -37,7 +37,7 @@
 #define AUTHORS proper_name ("Paul Eggert")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/sleep.c

@@ -36,7 +36,7 @@
   proper_name ("Paul Eggert")
 
 /* The name by which this program was run. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/sort.c

@@ -184,7 +184,7 @@ struct month
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* FIXME: None of these tables work with multibyte character sets.
    Also, there are many other bugs when handling multibyte characters.

src/split.c

@@ -47,7 +47,7 @@
 #define DEFAULT_SUFFIX_LENGTH 2
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Base name of output files.  */
 static char const *outbase;

src/stat.c

@@ -173,7 +173,7 @@ static struct option const long_options[] = {
   {NULL, 0, NULL, 0}
 };
 
-char *program_name;
+char const *program_name;
 
 /* Whether to follow symbolic links;  True for --dereference (-L).  */
 static bool follow_links;

src/stty.c

@@ -456,7 +456,7 @@ static struct option longopts[] =
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static void wrapf (const char *message, ...)
      __attribute__ ((__format__ (__printf__, 1, 2)));

src/su.c

@@ -129,7 +129,7 @@ static void run_shell (char const *, char const *, char **, size_t)
      ATTRIBUTE_NORETURN;
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* If true, pass the `-f' option to the subshell.  */
 static bool fast_startup;

src/sum.c

@@ -37,7 +37,7 @@
   proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* True if any of the files read were the standard input. */
 static bool have_read_stdin;

src/sync.c

@@ -31,7 +31,7 @@
 #define AUTHORS proper_name ("Jim Meyering")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/tac.c

@@ -76,7 +76,7 @@ tac -r -s '.\|
 #define WRITESIZE 8192
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The string that separates the records of the file. */
 static char const *separator;

src/tail.c

@@ -163,7 +163,7 @@ static uintmax_t max_n_unchanged_stats_between_opens =
   DEFAULT_MAX_N_UNCHANGED_STATS_BETWEEN_OPENS;
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* The process ID of the process (presumably on the current host)
    that is writing to all followed files.  */

src/tee.c

@@ -42,7 +42,7 @@ static bool append;
 static bool ignore_interrupts;
 
 /* The name that this program was run with. */
-char *program_name;
+char const *program_name;
 
 static struct option const long_options[] =
 {

src/test.c

@@ -48,7 +48,7 @@
 # include <sys/param.h>
 #endif
 
-char *program_name;
+char const *program_name;
 
 /* Exit status for syntax errors, etc.  */
 enum { TEST_TRUE, TEST_FALSE, TEST_FAILURE };

src/timeout.c

@@ -83,7 +83,7 @@ static int term_signal = SIGTERM;  /* same default as kill command.  */
 static int monitored_pid;
 static int sigs_to_ignore[NSIG];   /* so monitor can ignore sigs it resends.  */
 
-char *program_name;
+char const *program_name;
 
 static struct option const long_options[] = {
   {"signal", required_argument, NULL, 's'},

src/touch.c

@@ -49,7 +49,7 @@
 #define CH_MTIME 2
 
 /* The name by which this program was run. */
-char *program_name;
+char const *program_name;
 
 /* Which timestamps to change. */
 static int change_times;

src/tr.c

@@ -194,7 +194,7 @@ es_match (struct E_string const *es, size_t i, char c)
 }
 
 /* The name by which this program was run.  */
-char *program_name;
+char const *program_name;
 
 /* When true, each sequence in the input of a repeated character
    (call it c) is replaced (in the output) by a single occurrence of c

src/true.c

@@ -33,7 +33,7 @@
 #define AUTHORS proper_name ("Jim Meyering")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/tsort.c

@@ -60,7 +60,7 @@ struct item
 };
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* The head of the sorted list.  */
 static struct item *head = NULL;

src/tty.c

@@ -43,7 +43,7 @@ enum
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name under which this program was run. */
-char *program_name;
+char const *program_name;
 
 /* If true, return an exit status but produce no output. */
 static bool silent;

src/uname.c

@@ -87,7 +87,7 @@
 #define PRINT_OPERATING_SYSTEM 128
 
 /* The name this program was run with, for error messages. */
-char *program_name;
+char const *program_name;
 
 static struct option const uname_long_options[] =
 {

src/unexpand.c

@@ -53,7 +53,7 @@
 #define OUTPUT_BLOCK 256
 
 /* The name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 /* If true, convert blanks even after nonblank characters have been
    read on the line.  */

src/uniq.c

@@ -51,7 +51,7 @@
   while (0)
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* True if the LC_COLLATE locale is hard.  */
 static bool hard_LC_COLLATE;

src/unlink.c

@@ -36,7 +36,7 @@
 #define AUTHORS proper_name ("Michael Stone")
 
 /* Name this program was run with.  */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/uptime.c

@@ -48,7 +48,7 @@
 int getloadavg ();
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static void
 print_uptime (size_t n, const STRUCT_UTMP *this)

src/users.c

@@ -36,7 +36,7 @@
   proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 static int
 userid_compare (const void *v_a, const void *v_b)

src/wc.c

@@ -50,7 +50,7 @@
 #define BUFFER_SIZE (16 * 1024)
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* Cumulative number of lines, words, chars and bytes in all files so far.
    max_line_length is the maximum over all files processed so far.  */

src/who.c

@@ -99,7 +99,7 @@
 char *ttyname ();
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 /* If true, attempt to canonicalize hostnames via a DNS lookup. */
 static bool do_lookup;

src/whoami.c

@@ -36,7 +36,7 @@
 #define AUTHORS proper_name ("Richard Mlynarik")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)

src/yes.c

@@ -32,7 +32,7 @@
 #define AUTHORS proper_name ("David MacKenzie")
 
 /* The name this program was run with. */
-char *program_name;
+char const *program_name;
 
 void
 usage (int status)