Interface cleanup: Symlink handling & docs

This removes the ability to start nvim via the following aliases in
favor of just using their command line arguments:

ex        vim -e
exim      vim -E
view      vim -R
gvim      vim -g
gex       vim -eg
gview     vim -Rg
rvim      vim -Z
rview     vim -RZ
rgvim     vim -gZ
rgview    vim -RgZ

This also removes Vi mode (-v) for consistency. From ':help -v':

    -v  Start Ex in Vi mode.  Only makes a difference when the
    executable is called "ex" or "gvim".  For gvim the GUI is not
    started if possible.

runtime/doc/eval.txt

@@ -1551,9 +1551,9 @@ v:profiling	Normally zero.	Set to one after using ":profile start".
 		See |profiling|.
 
 					*v:progname* *progname-variable*
-v:progname	Contains the name (with path removed) with which Vim was
+v:progname	Contains the name (with path removed) with which Nvim was
-		invoked.  Allows you to do special initialisations for |view|,
+		invoked.  Allows you to do special initialisations for any
-		|rview|, or any other name you might symlink to Vim.
+		other name you might symlink to Nvim.
 		Read-only.
 
 					*v:progpath* *progpath-variable*

runtime/doc/quickref.txt

@@ -1128,7 +1128,6 @@ Context-sensitive completion on the command-line:
 |-+|	+[num]		    put the cursor at line [num] (default: last line)
 |-+c|	+{command}	    execute {command} after loading the file
 |-+/|	+/{pat} {file} ..   put the cursor at the first occurrence of {pat}
-|-v|	-v		    Vi mode, start ex in Normal mode
 |-e|	-e		    Ex mode, start vim in Ex mode
 |-R|	-R		    Read-only mode, implies -n
 |-m|	-m		    modifications not allowed (resets 'write' option)

runtime/doc/starting.txt

@@ -19,11 +19,11 @@ Starting Vim						*starting*
 
 Most often, Vim is started to edit a single file with the command
 
-	vim filename					*-vim*
+	nvim filename					*-vim*
 
 More generally, Vim is started with:
 
-	vim [option | filename] ..
+	nvim [option | filename] ..
 
 Option arguments and file name arguments can be mixed, and any number of them
 can be given.  However, watch out for options that take an argument.
@@ -39,7 +39,7 @@ filename	One or more file names.  The first one will be the current
 		on the first line of the buffer.
 		To avoid a file name starting with a '-' being interpreted as
 		an option, precede the arglist with "--", e.g.: >
-			vim -- -filename
+			nvim -- -filename
 <		All arguments after the "--" will be interpreted as file names,
 		no other options or "+command" argument can follow.
 
@@ -48,22 +48,18 @@ filename	One or more file names.  The first one will be the current
 		mode is to be used.
 
 		Starting in Normal mode: >
-			vim -
+			nvim -
-			ex -v -
 <		Start editing a new buffer, which is filled with text
 		that is read from stdin.  The commands that would normally be
 		read from stdin will now be read from stderr.  Example: >
-			find . -name "*.c" -print | vim -
+			find . -name "*.c" -print | nvim -
 <		The buffer will be marked modified, because it contains text
 		that needs to be saved.  Except when in readonly mode, then
 		the buffer is not marked modified.  Example: >
-			ls | view -
+			ls | nvim -R -
-<
 		Starting in Ex mode: >
-			ex -
+			nvim -e -
-			vim -e -
+			nvim -E
-			exim -
-			vim -E
 <		Start editing in silent mode.  See |-s-ex|.
 
 							*-t* *-tag*
@@ -85,32 +81,6 @@ filename	One or more file names.  The first one will be the current
 (nothing)	Without one of the four items above, Vim will start editing a
 		new buffer.  It's empty and doesn't have a file name.
 
-
-The startup mode can be changed by using another name instead of "vim", which
-is equal to giving options:
-ex	vim -e	    Start in Ex mode (see |Ex-mode|).		    *ex*
-exim	vim -E	    Start in improved Ex mode (see |Ex-mode|).	    *exim*
-			(normally not installed)
-view	vim -R	    Start in read-only mode (see |-R|).		    *view*
-gvim	vim -g	    Start the GUI (see |gui|).			    *gvim*
-gex	vim -eg	    Start the GUI in Ex mode.			  *gex*
-gview	vim -Rg	    Start the GUI in read-only mode.		  *gview*
-rvim	vim -Z	    Like "vim", but in restricted mode (see |-Z|)   *rvim*
-rview	vim -RZ	    Like "view", but in restricted mode.	  *rview*
-rgvim	vim -gZ	    Like "gvim", but in restricted mode.	  *rgvim*
-rgview	vim -RgZ    Like "gview", but in restricted mode.	  *rgview*
-
-Additional characters may follow, they are ignored.  For example, you can have
-"gvim-5" to start the GUI.  You must have an executable by that name then, of
-course.
-
-On Unix, you would normally have one executable called Vim, and links from the
-different startup-names to that executable.  If your system does not support
-links and you do not want to have several copies of the executable, you could
-use an alias instead.  For example: >
-	alias view   vim -R
-	alias gvim   vim -g
-<
 							*startup-options*
 The option arguments may be given in any order.  Single-letter options can be
 combined after one dash.  There can be no option arguments after the "--"
@@ -245,28 +215,20 @@ argument.
 -g		Start Vim in GUI mode.  See |gui|. For the opposite see |-v|.
 		{not in Vi}
 
-							*-v*
--v		Start Ex in Vi mode.  Only makes a difference when the
-		executable is called "ex" or "gvim".  For gvim the GUI is not
-		started if possible.
-
 							*-e*
--e		Start Vim in Ex mode |Q|.  Only makes a difference when the
+-e		Start Vim in Ex mode |Q|.
-		executable is not called "ex".
 
 							*-E*
--E		Start Vim in improved Ex mode |gQ|.  Only makes a difference
+-E		Start Vim in improved Ex mode |gQ|.
-		when the executable is not called "exim".
-		{not in Vi}
 
 							*-s-ex*
--s		Silent or batch mode.  Only when Vim was started as "ex" or
+-s		Silent or batch mode.  Only when "-s" is preceded by the "-e"
-		when preceded with the "-e" argument.  Otherwise see |-s|,
+		argument.  Otherwise see |-s|, which does take an argument
-		which does take an argument while this use of "-s" doesn't.
+		while this use of "-s" doesn't.  To be used when Vim is used
-		To be used when Vim is used to execute Ex commands from a file
+		to execute Ex commands from a file instead of a terminal.
-		instead of a terminal.  Switches off most prompts and
+		Switches off most prompts and informative messages.  Also
-		informative messages.  Also warnings and error messages.
+		warnings and error messages.  The output of these commands is
-		The output of these commands is displayed (to stdout):
+		displayed (to stdout):
 			:print
 			:list
 			:number
@@ -561,14 +523,6 @@ argument.
 		Note that the implementation is still primitive.  It won't
 		work with all applications and the menu doesn't work.
 
-If the executable is called "view", Vim will start in Readonly mode.  This is
-useful if you can make a hard or symbolic link from "view" to "vim".
-Starting in Readonly mode can also be done with "vim -R".
-
-If the executable is called "ex", Vim will start in "Ex" mode.  This means it
-will accept only ":" commands.  But when the "-v" argument is given, Vim will
-start in Normal mode anyway.
-
 Additional arguments are available on unix like systems when compiled with
 X11 GUI support.  See |gui-resources|.
 

runtime/doc/usr_90.txt

@@ -434,27 +434,9 @@ someone supplied, you can't do this.  Do delete the files manually, here is an
 example for when "/usr/local" was used as the root: >
 
 	rm -rf /usr/local/share/vim/vim61
-	rm /usr/local/bin/ex
-	rm /usr/local/bin/gview
-	rm /usr/local/bin/gvim
-	rm /usr/local/bin/gvim
-	rm /usr/local/bin/rgview
-	rm /usr/local/bin/rgvim
-	rm /usr/local/bin/rview
-	rm /usr/local/bin/rvim
-	rm /usr/local/bin/rvim
-	rm /usr/local/bin/view
 	rm /usr/local/bin/vim
 	rm /usr/local/bin/vimtutor
 	rm /usr/local/bin/xxd
-	rm /usr/local/man/man1/ex.1
-	rm /usr/local/man/man1/gview.1
-	rm /usr/local/man/man1/gvim.1
-	rm /usr/local/man/man1/rgview.1
-	rm /usr/local/man/man1/rgvim.1
-	rm /usr/local/man/man1/rview.1
-	rm /usr/local/man/man1/rvim.1
-	rm /usr/local/man/man1/view.1
 	rm /usr/local/man/man1/vim.1
 	rm /usr/local/man/man1/vimtutor.1
 	rm /usr/local/man/man1/xxd.1

runtime/doc/vi_diff.txt

@@ -830,10 +830,9 @@ Only Vim is able to accept options in between and after the file names.
 
 -D		Vim: debug mode.
 
--e		Elvis, Nvi, Vim: Start in Ex mode, as if the executable is
+-e		Elvis, Nvi, Vim: Start in Ex mode.
-		called "ex".
 
--E		Vim: Start in improved Ex mode |gQ|, like "exim".
+-E		Vim: Start in improved Ex mode |gQ|.
 
 -f		Vim: Run GUI in foreground.
 -f {session}	Elvis: Use {session} as the session file.

runtime/syntax/dirpager.vim

@@ -14,7 +14,7 @@
 " License:	  VIM License
 "		  Vim is Charityware, see ":help Uganda"
 "
-" Usage:	  $ ls -la | view -c "set ft=dirpager" -
+" Usage:	  $ ls -la | nvim -R -c "set ft=dirpager" -
 "
 "
 ",----[ ls(1posix) ]--------------------------------------------------

src/nvim/buffer.c

@@ -213,7 +213,7 @@ open_buffer (
    * So the modelines have priority over auto commands.
    */
   /* When reading stdin, the buffer contents always needs writing, so set
-   * the changed flag.  Unless in readonly mode: "ls | gview -".
+   * the changed flag.  Unless in readonly mode: "ls | nvim -R -".
    * When interrupted and 'cpoptions' contains 'i' set changed flag. */
   if ((got_int && vim_strchr(p_cpo, CPO_INTMOD) != NULL)
       || modified_was_set               /* ":set modified" used in autocmd */

src/nvim/ex_cmds.c

@@ -853,7 +853,7 @@ void do_bang(int addr_count, exarg_T *eap, int forceit, int do_in, int do_out)
   int scroll_save = msg_scroll;
 
   /*
-   * Disallow shell commands for "rvim".
+   * Disallow shell commands in restricted mode (-Z)
    * Disallow shell commands from .exrc and .vimrc in current directory for
    * security reasons.
    */
@@ -1217,7 +1217,7 @@ do_shell (
   int save_nwr;
 
   /*
-   * Disallow shell commands for "rvim".
+   * Disallow shell commands in restricted mode (-Z)
    * Disallow shell commands from .exrc and .vimrc in current directory for
    * security reasons.
    */
@@ -3378,7 +3378,7 @@ void ex_z(exarg_T *eap)
 int check_restricted(void)
 {
   if (restricted) {
-    EMSG(_("E145: Shell commands not allowed in rvim"));
+    EMSG(_("E145: Shell commands not allowed in restricted mode"));
     return TRUE;
   }
   return FALSE;

src/nvim/ex_docmd.c

@@ -5375,9 +5375,7 @@ static void ex_hide(exarg_T *eap)
  */
 static void ex_stop(exarg_T *eap)
 {
-  /*
+  // Disallow suspending in restricted mode (-Z)
-   * Disallow suspending for "rvim".
-   */
   if (!check_restricted()) {
     if (!eap->forceit) {
       autowrite_all();

src/nvim/globals.h

@@ -601,7 +601,7 @@ EXTERN volatile int full_screen INIT(= FALSE);
  * otherwise only writing some messages */
 
 EXTERN int restricted INIT(= FALSE);
-/* TRUE when started as "rvim" */
+// TRUE when started in restricted mode (-Z)
 EXTERN int secure INIT(= FALSE);
 /* non-zero when only "safe" commands are
  * allowed, e.g. when sourcing .exrc or .vimrc

src/nvim/main.c

@@ -204,11 +204,9 @@ int main(int argc, char **argv)
   // Check if we have an interactive window.
   check_and_set_isatty(&params);
 
-  /*
+  // Get the name with which Nvim was invoked, with and without path.
-   * Figure out the way to work from the command name argv[0].
+  set_vim_var_string(VV_PROGPATH, (char_u *)argv[0], -1);
-   * "view" sets "readonlymode", "rvim" sets "restricted", etc.
+  set_vim_var_string(VV_PROGNAME, path_tail((char_u *)argv[0]), -1);
-   */
-  parse_command_name(&params);
 
   /*
    * Process the command line arguments.  File names are put in the global
@@ -820,69 +818,8 @@ static void init_locale(void)
   }
   TIME_MSG("locale set");
 }
-
 #endif
 
-/*
- * Check for: [r][g][vi|vim|view][ex[im]]
- * If the executable name starts with "r" we disable shell commands.
- * If the next character is "g" we run the GUI version.
- * If the next characters are "view" we start in readonly mode.
- * If the next characters are "ex" we start in Ex mode.  If it's followed
- * by "im" use improved Ex mode.
- */
-static void parse_command_name(mparm_T *parmp)
-{
-  char_u      *initstr;
-
-  initstr = path_tail((char_u *)parmp->argv[0]);
-
-  set_vim_var_string(VV_PROGNAME, initstr, -1);
-  set_vim_var_string(VV_PROGPATH, (char_u *)parmp->argv[0], -1);
-
-  if (parse_string(&initstr, "editor", 6))
-    return;
-
-  if (parse_char_i(&initstr, 'r'))
-    restricted = TRUE;
-
-  /* "gvim" starts the GUI.  Also accept "Gvim" for MS-Windows. */
-  if (parse_char_i(&initstr, 'g'))
-    main_start_gui();
-
-  if (parse_string(&initstr, "view", 4)) {
-    readonlymode = TRUE;
-    curbuf->b_p_ro = TRUE;
-    p_uc = 10000;                       /* don't update very often */
-  } else {
-    parse_string(&initstr, "vim", 3);   /* consume "vim" if it's there */
-  }
-
-  if (parse_string(&initstr, "ex", 2)) {
-    if (parse_string(&initstr, "im", 2))
-      exmode_active = EXMODE_VIM;
-    else
-      exmode_active = EXMODE_NORMAL;
-  }
-}
-
-static bool parse_char_i(char_u **input, char val)
-{
-  if (TOLOWER_ASC(**input) == val) {
-    *input += 1;  /* or (*input)++ WITH parens */
-    return true;
-  }
-  return false;
-}
-
-static bool parse_string(char_u **input, char *val, int len)
-{
-  if (STRNICMP(*input, val, len) == 0) {
-    *input += len;
-    return true;
-  }
-  return false;
-}
 
 /*
  * Scan the command line arguments.
@@ -1134,10 +1071,6 @@ static void command_line_scan(mparm_T *parmp)
           }
           break;
 
-        case 'v':                 /* "-v"  Vi-mode (as if called "vi") */
-          exmode_active = 0;
-          break;
-
         case 'w':                 /* "-w{number}"	set window height */
           /* "-w {scriptout}"	write to script */
           if (vim_isdigit(((char_u *)argv[0])[argv_idx])) {
@@ -2034,13 +1967,12 @@ static void usage(void)
 #if !defined(UNIX)
   mch_msg(_("  --literal             Don't expand wildcards\n"));
 #endif
-  mch_msg(_("  -v                    Vi mode (like \"vi\")\n"));
+  mch_msg(_("  -e                    Ex mode\n"));
-  mch_msg(_("  -e                    Ex mode (like \"ex\")\n"));
   mch_msg(_("  -E                    Improved Ex mode\n"));
-  mch_msg(_("  -s                    Silent (batch) mode (only for \"ex\")\n"));
+  mch_msg(_("  -s                    Silent (batch) mode (only for ex mode)\n"));
   mch_msg(_("  -d                    Diff mode\n"));
-  mch_msg(_("  -R                    Readonly mode (like \"view\")\n"));
+  mch_msg(_("  -R                    Readonly mode\n"));
-  mch_msg(_("  -Z                    Restricted mode (like \"rvim\")\n"));
+  mch_msg(_("  -Z                    Restricted mode\n"));
   mch_msg(_("  -m                    Modifications (writing files) not allowed\n"));
   mch_msg(_("  -M                    Modifications in text not allowed\n"));
   mch_msg(_("  -b                    Binary mode\n"));