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PATCH Re: Regarding emulate: a thought, and refresh my memory?
On Mar 3, 5:25pm, Bart Schaefer wrote:
}
} The reason I ask is because it suddenly popped into my head that the
} emulate command might just as well parse other startup-time options
} besides just -c.
Never got any reply to that, but here for consideration is the patch.
In the documentation, we have way too many things called "option", so
I took to using "switch" for -L / -R and "flag" for what comes after
the shell name (because that's what the Invocation section calls them),
leaving "option" for the stuff you frob with setopt. Fixed a cross-
reference while I was at it.
The init.c hunks look bigger than they really are because of moving a
chunk out of the middle of parseargs().
Index: Doc/Zsh/builtins.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/builtins.yo,v
retrieving revision 1.137
diff -u -r1.137 builtins.yo
--- Doc/Zsh/builtins.yo 1 Mar 2012 13:00:53 -0000 1.137
+++ Doc/Zsh/builtins.yo 6 Mar 2012 08:15:26 -0000
@@ -348,7 +348,7 @@
cindex(sh, compatibility)
cindex(ksh, compatibility)
cindex(csh, compatibility)
-item(tt(emulate) [ tt(-LR) ] [ {tt(zsh)|tt(sh)|tt(ksh)|tt(csh)} [ tt(-c) tt(arg) ] ])(
+item(tt(emulate) [ tt(-LR) ] [ {tt(zsh)|tt(sh)|tt(ksh)|tt(csh)} [ var(flags) ... ] ])(
Without any argument print current emulation mode.
With single argument set up zsh options to emulate the specified shell
@@ -359,7 +359,7 @@
argument are the same as those used to determine the emulation at startup
based on the shell name, see
ifzman(\
-the section `Compatibility' in zmanref(zshmisc)
+the section COMPATIBILITY in zmanref(zsh)
)\
ifnzman(\
noderef(Compatibility)
@@ -373,26 +373,34 @@
tt(eval) commands is not considered to be running directly from the
function, hence does not provoke this behaviour.
-If the tt(-R) option is given, all options
+If the tt(-R) switch is given, all settable options
are reset to their default value corresponding to the specified emulation
mode, except for certain options describing the interactive
environment; otherwise, only those options likely to cause portability
-problems in scripts and functions are altered. If the tt(-L) option is given,
+problems in scripts and functions are altered. If the tt(-L) switch is given,
the options tt(LOCAL_OPTIONS) and tt(LOCAL_TRAPS) will be set as
well, causing the effects of the tt(emulate) command and any tt(setopt) and
tt(trap) commands to be local to the immediately surrounding shell
function, if any; normally these options are turned off in all emulation
-modes except tt(ksh). The tt(-L) and tt(-c) are mutually exclusive.
+modes except tt(ksh). The tt(-L) switch is mutually exclusive with the
+use of tt(-c) in var(flags).
-If tt(-c) tt(arg) is given, evaluate tt(arg) while the requested
-emulation is temporarily in effect. The emulation and all options will
-be restored to their original values before tt(emulate) returns. The
-tt(-R) flag may be used.
+The var(flags) may be any of the invocation-time flags described in
+ifnzman(noderef(Invocation))\
+ifzman(the section INVOCATION in zmanref(zsh)),
+except that `tt(-o EMACS)' and `tt(-o VI)' may not be used. Flags such
+as `tt(+r)'/`tt(+o restricted)' may be prohibited in some circumstances.
+If tt(-c) var(arg) appears in var(flags), var(arg) is evaluated while the
+requested emulation is temporarily in effect. In this case the emulation
+mode and all options are restored to their previous values before
+tt(emulate) returns. The tt(-R) switch may precede the name of the shell
+to emulate; note this has a meaning distinct from including tt(-R) in
+var(flags).
Use of tt(-c) enables `sticky' emulation mode for functions defined
within the evaluated expression: the emulation mode is associated
thereafter with the function so that whenever the function is executed
-the emulation (respecting the tt(-R) flag, if present) and all
+the emulation (respecting the tt(-R) switch, if present) and all
options are set before entry to the function, and restored after exit.
If the function is called when the sticky emulation is already in
effect, either within an `tt(emulate) var(shell) tt(-c)' expression or
@@ -434,7 +442,7 @@
sitem(3.)(No special handling is provided for functions marked for
tt(autoload) nor for functions present in wordcode created by
the tt(zcompile) command.)
-sitem(4.)(The presence or absence of the tt(-R) flag to tt(emulate)
+sitem(4.)(The presence or absence of the tt(-R) switch to tt(emulate)
corresponds to different sticky emulation modes, so for example
`tt(emulate sh -c)', `tt(emulate -R sh -c)' and `tt(emulate csh -c)'
are treated as three distinct sticky emulations.)
Index: Doc/Zsh/params.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/params.yo,v
retrieving revision 1.66
diff -u -r1.66 params.yo
--- Doc/Zsh/params.yo 7 Sep 2011 13:40:24 -0000 1.66
+++ Doc/Zsh/params.yo 6 Mar 2012 08:15:27 -0000
@@ -1003,6 +1003,10 @@
backquotes only. Should the chosen character be one of singlequote,
doublequote or backquote, there must also be an odd number of them
on the command line for the last one to be removed.
+
+For backward compabitility, if the tt(SUNKEYBOARDHACK) option is
+explicitly set, the value of tt(KEYBOARD_HACK) reverts to backquote.
+If the option is explicitly unset, this variable is set to empty.
)
vindex(KEYTIMEOUT)
item(tt(KEYTIMEOUT))(
Index: Etc/FAQ.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Etc/FAQ.yo,v
retrieving revision 1.63
diff -u -r1.63 FAQ.yo
--- Etc/FAQ.yo 23 Feb 2012 21:39:31 -0000 1.63
+++ Etc/FAQ.yo 6 Mar 2012 08:15:29 -0000
@@ -722,7 +722,7 @@
appear inside the tt({ }) the way they get appended to an alias.
myeit() If the csh alias references its own name (tt(alias rm "rm -i")),
- then in a zsh function you need the "command" keyword
+ then in a zsh function you need the "command" or "builtin" keyword
(function tt(rm() { command rm -i "$@" })), but in a zsh alias
you don't (tt(alias rm="rm -i")).
Index: Src/builtin.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/builtin.c,v
retrieving revision 1.255
diff -u -r1.255 builtin.c
--- Src/builtin.c 5 Feb 2012 19:28:16 -0000 1.255
+++ Src/builtin.c 6 Mar 2012 08:15:34 -0000
@@ -58,7 +58,7 @@
BUILTIN("disable", 0, bin_enable, 0, -1, BIN_DISABLE, "afmrs", NULL),
BUILTIN("disown", 0, bin_fg, 0, -1, BIN_DISOWN, NULL, NULL),
BUILTIN("echo", BINF_SKIPINVALID, bin_print, 0, -1, BIN_ECHO, "neE", "-"),
- BUILTIN("emulate", 0, bin_emulate, 0, 3, 0, "LR", NULL),
+ BUILTIN("emulate", 0, bin_emulate, 0, -1, 0, "LR", NULL),
BUILTIN("enable", 0, bin_enable, 0, -1, BIN_ENABLE, "afmrs", NULL),
BUILTIN("eval", BINF_PSPECIAL, bin_eval, 0, -1, BIN_EVAL, NULL, NULL),
BUILTIN("exit", BINF_PSPECIAL, bin_break, 0, 1, BIN_EXIT, NULL, NULL),
@@ -4958,14 +4958,14 @@
{
int opt_L = OPT_ISSET(ops, 'L');
int opt_R = OPT_ISSET(ops, 'R');
- int saveemulation, savesticky_emulation;
- int ret;
+ int saveemulation, savesticky_emulation, savehackchar;
+ int ret = 1;
char saveopts[OPT_SIZE];
+ char *cmd = 0;
+ const char *shname = *argv;
/* without arguments just print current emulation */
- if (!*argv) {
- const char *shname;
-
+ if (!shname) {
if (opt_L || opt_R) {
zwarnnam("emulate", "not enough arguments");
return 1;
@@ -4995,39 +4995,46 @@
/* with single argument set current emulation */
if (!argv[1]) {
- emulate(*argv, OPT_ISSET(ops,'R'));
+ emulate(shname, OPT_ISSET(ops,'R'));
if (OPT_ISSET(ops,'L'))
opts[LOCALOPTIONS] = opts[LOCALTRAPS] = 1;
return 0;
}
- /* If "-c command" is given, evaluate command using specified
- * emulation mode.
- */
- if (strcmp(argv[1], "-c")) {
- zwarnnam("emulate", "unknown argument %s", argv[1]);
- return 1;
- }
+ argv++;
+ memcpy(saveopts, opts, sizeof(opts));
+ savehackchar = keyboardhackchar;
+ cmd = parseopts("emulate", &argv);
- if (!argv[2]) {
- zwarnnam("emulate", "not enough arguments");
- return 1;
+ /* parseopts() has consumed anything that looks like an option */
+ if (*argv) {
+ zwarnnam("emulate", "unknown argument %s", *argv);
+ goto restore;
}
- if (opt_L) {
- zwarnnam("emulate", "option -L incompatible with -c");
- return 1;
- }
+ /* If "-c command" is given, evaluate command using specified
+ * emulation mode.
+ */
+ if (cmd) {
+ if (opt_L) {
+ zwarnnam("emulate", "option -L incompatible with -c");
+ goto restore;
+ }
+ *--argv = cmd; /* on stack, never free()d, see execbuiltin() */
+ } else
+ return 0;
- memcpy(saveopts, opts, sizeof(opts));
saveemulation = emulation;
savesticky_emulation = sticky_emulation;
- emulate(*argv, OPT_ISSET(ops,'R'));
+ emulate(shname, OPT_ISSET(ops,'R'));
sticky_emulation = emulation;
- ret = eval(argv+2);
- memcpy(opts, saveopts, sizeof(opts));
+ ret = eval(argv);
sticky_emulation = savesticky_emulation;
emulation = saveemulation;
+ restore:
+ memcpy(opts, saveopts, sizeof(opts));
+ keyboardhackchar = savehackchar;
+ inittyptab(); /* restore banghist */
return ret;
}
Index: Src/init.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/init.c,v
retrieving revision 1.122
diff -u -r1.122 init.c
--- Src/init.c 5 Jan 2012 20:01:25 -0000 1.122
+++ Src/init.c 6 Mar 2012 08:15:34 -0000
@@ -215,6 +215,7 @@
return LOOP_OK;
}
+/* Shared among parseargs(), parseopts(), init_io(), and init_misc() */
static char *cmd;
static int restricted;
@@ -222,9 +223,7 @@
static void
parseargs(char **argv, char **runscript)
{
- int optionbreak = 0;
char **x;
- int action, optno;
LinkList paramlist;
argzero = *argv++;
@@ -247,6 +246,49 @@
opts[SHINSTDIN] = 0;
opts[SINGLECOMMAND] = 0;
+ cmd = parseopts(NULL, &argv);
+
+ paramlist = znewlinklist();
+ if (*argv) {
+ if (unset(SHINSTDIN)) {
+ if (cmd)
+ argzero = *argv;
+ else
+ *runscript = *argv;
+ opts[INTERACTIVE] &= 1;
+ argv++;
+ }
+ while (*argv)
+ zaddlinknode(paramlist, ztrdup(*argv++));
+ } else if (!cmd)
+ opts[SHINSTDIN] = 1;
+ if(isset(SINGLECOMMAND))
+ opts[INTERACTIVE] &= 1;
+ opts[INTERACTIVE] = !!opts[INTERACTIVE];
+ if (opts[MONITOR] == 2)
+ opts[MONITOR] = opts[INTERACTIVE];
+ if (opts[HASHDIRS] == 2)
+ opts[HASHDIRS] = opts[INTERACTIVE];
+ pparams = x = (char **) zshcalloc((countlinknodes(paramlist) + 1) * sizeof(char *));
+
+ while ((*x++ = (char *)getlinknode(paramlist)));
+ free(paramlist);
+ argzero = ztrdup(argzero);
+}
+
+/**/
+mod_export char *
+parseopts(char *nam, char ***argvp)
+{
+ int optionbreak = 0;
+ int action, optno;
+ char *cmd = 0; /* deliberately hides static */
+ char **argv = *argvp;
+
+#define WARN_OPTION(F, S) if (nam) zwarnnam(nam, F, S); else zerr(F, S)
+#define LAST_OPTION(N) \
+ if (nam) { if (*argv) argv++; goto doneargv; } else exit(N)
+
/* loop through command line options (begins with "-" or "+") */
while (!optionbreak && *argv && (**argv == '-' || **argv == '+')) {
char *args = *argv;
@@ -267,11 +309,11 @@
if (!strcmp(*argv, "version")) {
printf("zsh %s (%s-%s-%s)\n",
ZSH_VERSION, MACHTYPE, VENDOR, OSTYPE);
- exit(0);
+ LAST_OPTION(0);
}
if (!strcmp(*argv, "help")) {
printhelp();
- exit(0);
+ LAST_OPTION(0);
}
/* `-' characters are allowed in long options */
for(args = *argv; *args; args++)
@@ -292,73 +334,54 @@
if (!*++*argv)
argv++;
if (!*argv) {
- zerr("string expected after -o");
- exit(1);
+ WARN_OPTION("string expected after -o", NULL);
+ LAST_OPTION(1);
}
longoptions:
if (!(optno = optlookup(*argv))) {
- zerr("no such option: %s", *argv);
- exit(1);
- } else if (optno == RESTRICTED)
+ WARN_OPTION("no such option: %s", *argv);
+ LAST_OPTION(1);
+ } else if (optno == RESTRICTED && !nam)
restricted = action;
- else
- dosetopt(optno, action, 1);
+ else if ((optno == EMACSMODE || optno == VIMODE) && nam)
+ WARN_OPTION("can't change option: %s", *argv);
+ else if (dosetopt(optno, action, !nam) && nam)
+ WARN_OPTION("can't change option: %s", *argv);
break;
} else if (isspace(STOUC(**argv))) {
/* zsh's typtab not yet set, have to use ctype */
while (*++*argv)
if (!isspace(STOUC(**argv))) {
- badoptionstring:
- zerr("bad option string: `%s'", args);
- exit(1);
+ badoptionstring:
+ WARN_OPTION("bad option string: '%s'", args);
+ LAST_OPTION(1);
}
break;
} else {
if (!(optno = optlookupc(**argv))) {
- zerr("bad option: -%c", **argv);
- exit(1);
- } else if (optno == RESTRICTED)
+ WARN_OPTION("bad option: -%c", **argv);
+ LAST_OPTION(1);
+ } else if (optno == RESTRICTED && !nam)
restricted = action;
- else
- dosetopt(optno, action, 1);
+ else if ((optno == EMACSMODE || optno == VIMODE) && nam)
+ WARN_OPTION("can't change option: %s", *argv);
+ else if (dosetopt(optno, action, !nam) && nam)
+ WARN_OPTION("can't change option: -%c", **argv);
}
}
argv++;
}
- doneoptions:
- paramlist = znewlinklist();
+ doneoptions:
if (cmd) {
if (!*argv) {
- zerr("string expected after -%s", cmd);
- exit(1);
+ WARN_OPTION("string expected after -%s", cmd);
+ LAST_OPTION(1);
}
cmd = *argv++;
}
- if (*argv) {
- if (unset(SHINSTDIN)) {
- if (cmd)
- argzero = *argv;
- else
- *runscript = *argv;
- opts[INTERACTIVE] &= 1;
- argv++;
- }
- while (*argv)
- zaddlinknode(paramlist, ztrdup(*argv++));
- } else if (!cmd)
- opts[SHINSTDIN] = 1;
- if(isset(SINGLECOMMAND))
- opts[INTERACTIVE] &= 1;
- opts[INTERACTIVE] = !!opts[INTERACTIVE];
- if (opts[MONITOR] == 2)
- opts[MONITOR] = opts[INTERACTIVE];
- if (opts[HASHDIRS] == 2)
- opts[HASHDIRS] = opts[INTERACTIVE];
- pparams = x = (char **) zshcalloc((countlinknodes(paramlist) + 1) * sizeof(char *));
-
- while ((*x++ = (char *)getlinknode(paramlist)));
- free(paramlist);
- argzero = ztrdup(argzero);
+ doneargv:
+ *argvp = argv;
+ return cmd;
}
/**/
Index: Src/options.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/options.c,v
retrieving revision 1.60
diff -u -r1.60 options.c
--- Src/options.c 1 Mar 2012 13:00:53 -0000 1.60
+++ Src/options.c 6 Mar 2012 08:15:35 -0000
@@ -767,6 +767,8 @@
return -1;
#endif /* GETPWNAM_FAKED */
} else if ((optno == EMACSMODE || optno == VIMODE) && value) {
+ if (sticky_emulation)
+ return -1;
zleentry(ZLE_CMD_SET_KEYMAP, optno);
opts[(optno == EMACSMODE) ? VIMODE : EMACSMODE] = 0;
} else if (optno == SUNKEYBOARDHACK) {
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