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builtin.c
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builtin.c
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/*
* builtin.c - builtin commands
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1992-1997 Paul Falstad
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Paul Falstad or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Paul Falstad and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Paul Falstad and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Paul Falstad and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
/* this is defined so we get the prototype for open_memstream */
#define _GNU_SOURCE 1
#include "zsh.mdh"
#include "builtin.pro"
#include <math.h>
/* Builtins in the main executable */
static struct builtin builtins[] =
{
BIN_PREFIX("-", BINF_DASH),
BIN_PREFIX("builtin", BINF_BUILTIN),
BIN_PREFIX("command", BINF_COMMAND),
BIN_PREFIX("exec", BINF_EXEC),
BIN_PREFIX("noglob", BINF_NOGLOB),
BUILTIN("[", BINF_HANDLES_OPTS, bin_test, 0, -1, BIN_BRACKET, NULL, NULL),
BUILTIN(".", BINF_PSPECIAL, bin_dot, 1, -1, 0, NULL, NULL),
BUILTIN(":", BINF_PSPECIAL, bin_true, 0, -1, 0, NULL, NULL),
BUILTIN("alias", BINF_MAGICEQUALS | BINF_PLUSOPTS, bin_alias, 0, -1, 0, "Lgmrs", NULL),
BUILTIN("autoload", BINF_PLUSOPTS, bin_functions, 0, -1, 0, "dmktrRTUwWXz", "u"),
BUILTIN("bg", 0, bin_fg, 0, -1, BIN_BG, NULL, NULL),
BUILTIN("break", BINF_PSPECIAL, bin_break, 0, 1, BIN_BREAK, NULL, NULL),
BUILTIN("bye", 0, bin_break, 0, 1, BIN_EXIT, NULL, NULL),
BUILTIN("cd", BINF_SKIPINVALID | BINF_SKIPDASH | BINF_DASHDASHVALID, bin_cd, 0, 2, BIN_CD, "qsPL", NULL),
BUILTIN("chdir", BINF_SKIPINVALID | BINF_SKIPDASH | BINF_DASHDASHVALID, bin_cd, 0, 2, BIN_CD, "qsPL", NULL),
BUILTIN("continue", BINF_PSPECIAL, bin_break, 0, 1, BIN_CONTINUE, NULL, NULL),
BUILTIN("declare", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, 0, "AE:%F:%HL:%R:%TUZ:%afghi:%klmp:%rtuxz", NULL),
BUILTIN("dirs", 0, bin_dirs, 0, -1, 0, "clpv", NULL),
BUILTIN("disable", 0, bin_enable, 0, -1, BIN_DISABLE, "afmprs", 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, -1, 0, "lLR", NULL),
BUILTIN("enable", 0, bin_enable, 0, -1, BIN_ENABLE, "afmprs", 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),
BUILTIN("export", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, BIN_EXPORT, "E:%F:%HL:%R:%TUZ:%afhi:%lp:%rtu", "xg"),
BUILTIN("false", 0, bin_false, 0, -1, 0, NULL, NULL),
/*
* We used to behave as if the argument to -e was optional.
* But that's actually not useful, so it's more consistent to
* cause an error.
*/
BUILTIN("fc", 0, bin_fc, 0, -1, BIN_FC, "aAdDe:EfiIlLmnpPrRt:W", NULL),
BUILTIN("fg", 0, bin_fg, 0, -1, BIN_FG, NULL, NULL),
BUILTIN("float", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, 0, "E:%F:%HL:%R:%Z:%ghlp:%rtux", "E"),
BUILTIN("functions", BINF_PLUSOPTS, bin_functions, 0, -1, 0, "ckmMstTuUWx:z", NULL),
BUILTIN("getln", 0, bin_read, 0, -1, 0, "ecnAlE", "zr"),
BUILTIN("getopts", 0, bin_getopts, 2, -1, 0, NULL, NULL),
BUILTIN("hash", BINF_MAGICEQUALS, bin_hash, 0, -1, 0, "Ldfmrv", NULL),
#ifdef ZSH_HASH_DEBUG
BUILTIN("hashinfo", 0, bin_hashinfo, 0, 0, 0, NULL, NULL),
#endif
BUILTIN("history", 0, bin_fc, 0, -1, BIN_FC, "adDEfiLmnpPrt:", "l"),
BUILTIN("integer", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, 0, "HL:%R:%Z:%ghi:%lp:%rtux", "i"),
BUILTIN("jobs", 0, bin_fg, 0, -1, BIN_JOBS, "dlpZrs", NULL),
BUILTIN("kill", BINF_HANDLES_OPTS, bin_kill, 0, -1, 0, NULL, NULL),
BUILTIN("let", 0, bin_let, 1, -1, 0, NULL, NULL),
BUILTIN("local", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, 0, "AE:%F:%HL:%R:%TUZ:%ahi:%lp:%rtux", NULL),
BUILTIN("log", 0, bin_log, 0, 0, 0, NULL, NULL),
BUILTIN("logout", 0, bin_break, 0, 1, BIN_LOGOUT, NULL, NULL),
#if defined(ZSH_MEM) & defined(ZSH_MEM_DEBUG)
BUILTIN("mem", 0, bin_mem, 0, 0, 0, "v", NULL),
#endif
#if defined(ZSH_PAT_DEBUG)
BUILTIN("patdebug", 0, bin_patdebug, 1, -1, 0, "p", NULL),
#endif
BUILTIN("popd", BINF_SKIPINVALID | BINF_SKIPDASH | BINF_DASHDASHVALID, bin_cd, 0, 1, BIN_POPD, "q", NULL),
BUILTIN("print", BINF_PRINTOPTS, bin_print, 0, -1, BIN_PRINT, "abcC:Df:ilmnNoOpPrRsSu:v:x:X:z-", NULL),
BUILTIN("printf", BINF_SKIPINVALID | BINF_SKIPDASH, bin_print, 1, -1, BIN_PRINTF, "v:", NULL),
BUILTIN("pushd", BINF_SKIPINVALID | BINF_SKIPDASH | BINF_DASHDASHVALID, bin_cd, 0, 2, BIN_PUSHD, "qsPL", NULL),
BUILTIN("pushln", 0, bin_print, 0, -1, BIN_PRINT, NULL, "-nz"),
BUILTIN("pwd", 0, bin_pwd, 0, 0, 0, "rLP", NULL),
BUILTIN("r", 0, bin_fc, 0, -1, BIN_R, "IlLnr", NULL),
BUILTIN("read", 0, bin_read, 0, -1, 0, "cd:ek:%lnpqrst:%zu:AE", NULL),
BUILTIN("readonly", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, BIN_READONLY, "AE:%F:%HL:%R:%TUZ:%afghi:%lptux", "r"),
BUILTIN("rehash", 0, bin_hash, 0, 0, 0, "df", "r"),
BUILTIN("return", BINF_PSPECIAL, bin_break, 0, 1, BIN_RETURN, NULL, NULL),
BUILTIN("set", BINF_PSPECIAL | BINF_HANDLES_OPTS, bin_set, 0, -1, 0, NULL, NULL),
BUILTIN("setopt", 0, bin_setopt, 0, -1, BIN_SETOPT, NULL, NULL),
BUILTIN("shift", BINF_PSPECIAL, bin_shift, 0, -1, 0, "p", NULL),
BUILTIN("source", BINF_PSPECIAL, bin_dot, 1, -1, 0, NULL, NULL),
BUILTIN("suspend", 0, bin_suspend, 0, 0, 0, "f", NULL),
BUILTIN("test", BINF_HANDLES_OPTS, bin_test, 0, -1, BIN_TEST, NULL, NULL),
BUILTIN("ttyctl", 0, bin_ttyctl, 0, 0, 0, "fu", NULL),
BUILTIN("times", BINF_PSPECIAL, bin_times, 0, 0, 0, NULL, NULL),
BUILTIN("trap", BINF_PSPECIAL | BINF_HANDLES_OPTS, bin_trap, 0, -1, 0, NULL, NULL),
BUILTIN("true", 0, bin_true, 0, -1, 0, NULL, NULL),
BUILTIN("type", 0, bin_whence, 0, -1, 0, "ampfsSw", "v"),
BUILTIN("typeset", BINF_PLUSOPTS | BINF_MAGICEQUALS | BINF_PSPECIAL | BINF_ASSIGN, (HandlerFunc)bin_typeset, 0, -1, 0, "AE:%F:%HL:%R:%TUZ:%afghi:%klp:%rtuxmz", NULL),
BUILTIN("umask", 0, bin_umask, 0, 1, 0, "S", NULL),
BUILTIN("unalias", 0, bin_unhash, 0, -1, BIN_UNALIAS, "ams", NULL),
BUILTIN("unfunction", 0, bin_unhash, 1, -1, BIN_UNFUNCTION, "m", "f"),
BUILTIN("unhash", 0, bin_unhash, 1, -1, BIN_UNHASH, "adfms", NULL),
BUILTIN("unset", BINF_PSPECIAL, bin_unset, 1, -1, BIN_UNSET, "fmv", NULL),
BUILTIN("unsetopt", 0, bin_setopt, 0, -1, BIN_UNSETOPT, NULL, NULL),
BUILTIN("wait", 0, bin_fg, 0, -1, BIN_WAIT, NULL, NULL),
BUILTIN("whence", 0, bin_whence, 0, -1, 0, "acmpvfsSwx:", NULL),
BUILTIN("where", 0, bin_whence, 0, -1, 0, "pmsSwx:", "ca"),
BUILTIN("which", 0, bin_whence, 0, -1, 0, "ampsSwx:", "c"),
BUILTIN("zmodload", 0, bin_zmodload, 0, -1, 0, "AFRILP:abcfdilmpsue", NULL),
BUILTIN("zcompile", 0, bin_zcompile, 0, -1, 0, "tUMRcmzka", NULL),
};
/****************************************/
/* Builtin Command Hash Table Functions */
/****************************************/
/* hash table containing builtin commands */
/**/
mod_export HashTable builtintab;
/**/
void
createbuiltintable(void)
{
builtintab = newhashtable(85, "builtintab", NULL);
builtintab->hash = hasher;
builtintab->emptytable = NULL;
builtintab->filltable = NULL;
builtintab->cmpnodes = strcmp;
builtintab->addnode = addhashnode;
builtintab->getnode = gethashnode;
builtintab->getnode2 = gethashnode2;
builtintab->removenode = removehashnode;
builtintab->disablenode = disablehashnode;
builtintab->enablenode = enablehashnode;
builtintab->freenode = freebuiltinnode;
builtintab->printnode = printbuiltinnode;
(void)addbuiltins("zsh", builtins, sizeof(builtins)/sizeof(*builtins));
}
/* Print a builtin */
/**/
static void
printbuiltinnode(HashNode hn, int printflags)
{
Builtin bn = (Builtin) hn;
if (printflags & PRINT_WHENCE_WORD) {
printf("%s: builtin\n", bn->node.nam);
return;
}
if (printflags & PRINT_WHENCE_CSH) {
printf("%s: shell built-in command\n", bn->node.nam);
return;
}
if (printflags & PRINT_WHENCE_VERBOSE) {
printf("%s is a shell builtin\n", bn->node.nam);
return;
}
/* default is name only */
printf("%s\n", bn->node.nam);
}
/**/
static void
freebuiltinnode(HashNode hn)
{
Builtin bn = (Builtin) hn;
if(!(bn->node.flags & BINF_ADDED)) {
zsfree(bn->node.nam);
zsfree(bn->optstr);
zfree(bn, sizeof(struct builtin));
}
}
/**/
void
init_builtins(void)
{
if (!EMULATION(EMULATE_ZSH)) {
HashNode hn = reswdtab->getnode2(reswdtab, "repeat");
if (hn)
reswdtab->disablenode(hn, 0);
}
}
/* Make sure we have space for a new option and increment. */
#define OPT_ALLOC_CHUNK 16
/**/
static int
new_optarg(Options ops)
{
/* Argument index must be a non-zero 6-bit number. */
if (ops->argscount == 63)
return 1;
if (ops->argsalloc == ops->argscount) {
char **newptr =
(char **)zhalloc((ops->argsalloc + OPT_ALLOC_CHUNK) *
sizeof(char *));
if (ops->argsalloc)
memcpy(newptr, ops->args, ops->argsalloc * sizeof(char *));
ops->args = newptr;
ops->argsalloc += OPT_ALLOC_CHUNK;
}
ops->argscount++;
return 0;
}
/* execute a builtin handler function after parsing the arguments */
/**/
int
execbuiltin(LinkList args, LinkList assigns, Builtin bn)
{
char *pp, *name, *optstr;
int flags, argc, execop, xtr = isset(XTRACE);
struct options ops;
/* initialise options structure */
memset(ops.ind, 0, MAX_OPS*sizeof(unsigned char));
ops.args = NULL;
ops.argscount = ops.argsalloc = 0;
/* initialize some local variables */
name = (char *) ugetnode(args);
if (!bn->handlerfunc) {
DPUTS(1, "Missing builtin detected too late");
deletebuiltin(bn->node.nam);
return 1;
}
/* get some information about the command */
flags = bn->node.flags;
optstr = bn->optstr;
/* Set up the argument list. */
/* count the arguments */
argc = countlinknodes(args);
{
/*
* Keep all arguments, including options, in an array.
* We don't actually need the option part of the argument
* after option processing, but it makes XTRACE output
* much simpler.
*/
VARARR(char *, argarr, argc + 1);
char **argv;
/*
* Get the actual arguments, into argv. Remember argarr
* may be an array declaration, depending on the compiler.
*/
argv = argarr;
while ((*argv++ = (char *)ugetnode(args)));
argv = argarr;
/* Sort out the options. */
if (optstr) {
char *arg = *argv;
int sense; /* 1 for -x, 0 for +x */
/* while arguments look like options ... */
while (arg &&
/* Must begin with - or maybe + */
((sense = (*arg == '-')) ||
((flags & BINF_PLUSOPTS) && *arg == '+'))) {
/* Digits aren't arguments unless the command says they are. */
if (!(flags & BINF_KEEPNUM) && idigit(arg[1]))
break;
/* For cd and friends, a single dash is not an option. */
if ((flags & BINF_SKIPDASH) && !arg[1])
break;
if ((flags & BINF_DASHDASHVALID) && !strcmp(arg, "--")) {
/*
* Need to skip this before checking whether this is
* really an option.
*/
argv++;
break;
}
/*
* Unrecognised options to echo etc. are not really
* options.
*
* Note this flag is not smart enough to handle option
* arguments. In fact, ideally it shouldn't be added
* to any new builtins, to preserve standard option
* handling as much as possible.
*/
if (flags & BINF_SKIPINVALID) {
char *p = arg;
while (*++p && strchr(optstr, (int) *p));
if (*p)
break;
}
/* handle -- or - (ops.ind['-']), and +
* (ops.ind['-'] and ops.ind['+']) */
if (arg[1] == '-')
arg++;
if (!arg[1]) {
ops.ind['-'] = 1;
if (!sense)
ops.ind['+'] = 1;
}
/* save options in ops, as long as they are in bn->optstr */
while (*++arg) {
char *optptr;
if ((optptr = strchr(optstr, execop = (int)*arg))) {
ops.ind[(int)*arg] = (sense) ? 1 : 2;
if (optptr[1] == ':') {
char *argptr = NULL;
if (optptr[2] == ':') {
if (arg[1])
argptr = arg+1;
/* Optional argument in same word*/
} else if (optptr[2] == '%') {
/* Optional numeric argument in same
* or next word. */
if (arg[1] && idigit(arg[1]))
argptr = arg+1;
else if (argv[1] && idigit(*argv[1]))
argptr = arg = *++argv;
} else {
/* Mandatory argument */
if (arg[1])
argptr = arg+1;
else if ((arg = *++argv))
argptr = arg;
else {
zwarnnam(name, "argument expected: -%c",
execop);
return 1;
}
}
if (argptr) {
if (new_optarg(&ops)) {
zwarnnam(name,
"too many option arguments");
return 1;
}
ops.ind[execop] |= ops.argscount << 2;
ops.args[ops.argscount-1] = argptr;
while (arg[1])
arg++;
}
}
} else
break;
}
/* The above loop may have exited on an invalid option. (We *
* assume that any option requiring metafication is invalid.) */
if (*arg) {
if(*arg == Meta)
*++arg ^= 32;
zwarnnam(name, "bad option: %c%c", "+-"[sense], *arg);
return 1;
}
arg = *++argv;
/* for the "print" builtin, the options after -R are treated as
options to "echo" */
if ((flags & BINF_PRINTOPTS) && ops.ind['R'] &&
!ops.ind['f']) {
optstr = "ne";
flags |= BINF_SKIPINVALID;
}
/* the option -- indicates the end of the options */
if (ops.ind['-'])
break;
}
} else if (!(flags & BINF_HANDLES_OPTS) && *argv &&
!strcmp(*argv, "--")) {
ops.ind['-'] = 1;
argv++;
}
/* handle built-in options, for overloaded handler functions */
if ((pp = bn->defopts)) {
while (*pp) {
/* only if not already set */
if (!ops.ind[(int)*pp])
ops.ind[(int)*pp] = 1;
pp++;
}
}
/* Fix the argument count by subtracting option arguments */
argc -= argv - argarr;
if (errflag) {
errflag &= ~ERRFLAG_ERROR;
return 1;
}
/* check that the argument count lies within the specified bounds */
if (argc < bn->minargs || (argc > bn->maxargs && bn->maxargs != -1)) {
zwarnnam(name, (argc < bn->minargs)
? "not enough arguments" : "too many arguments");
return 1;
}
/* display execution trace information, if required */
if (xtr) {
/* Use full argument list including options for trace output */
char **fullargv = argarr;
printprompt4();
fprintf(xtrerr, "%s", name);
while (*fullargv) {
fputc(' ', xtrerr);
quotedzputs(*fullargv++, xtrerr);
}
if (assigns) {
LinkNode node;
for (node = firstnode(assigns); node; incnode(node)) {
Asgment asg = (Asgment)node;
fputc(' ', xtrerr);
quotedzputs(asg->name, xtrerr);
if (asg->flags & ASG_ARRAY) {
fprintf(xtrerr, "=(");
if (asg->value.array) {
if (asg->flags & ASG_KEY_VALUE) {
LinkNode keynode, valnode;
keynode = firstnode(asg->value.array);
for (;;) {
if (!keynode)
break;
valnode = nextnode(keynode);
if (!valnode)
break;
fputc('[', xtrerr);
quotedzputs((char *)getdata(keynode),
xtrerr);
fprintf(stderr, "]=");
quotedzputs((char *)getdata(valnode),
xtrerr);
keynode = nextnode(valnode);
}
} else {
LinkNode arrnode;
for (arrnode = firstnode(asg->value.array);
arrnode;
incnode(arrnode)) {
fputc(' ', xtrerr);
quotedzputs((char *)getdata(arrnode),
xtrerr);
}
}
}
fprintf(xtrerr, " )");
} else if (asg->value.scalar) {
fputc('=', xtrerr);
quotedzputs(asg->value.scalar, xtrerr);
}
}
}
fputc('\n', xtrerr);
fflush(xtrerr);
}
/* call the handler function, and return its return value */
if (flags & BINF_ASSIGN)
{
/*
* Takes two sets of arguments.
*/
HandlerFuncAssign assignfunc = (HandlerFuncAssign)bn->handlerfunc;
return (*(assignfunc)) (name, argv, assigns, &ops, bn->funcid);
}
else
{
return (*(bn->handlerfunc)) (name, argv, &ops, bn->funcid);
}
}
}
/* Enable/disable an element in one of the internal hash tables. *
* With no arguments, it lists all the currently enabled/disabled *
* elements in that particular hash table. */
/**/
int
bin_enable(char *name, char **argv, Options ops, int func)
{
HashTable ht;
HashNode hn;
ScanFunc scanfunc;
Patprog pprog;
int flags1 = 0, flags2 = 0;
int match = 0, returnval = 0;
/* Find out which hash table we are working with. */
if (OPT_ISSET(ops,'p')) {
return pat_enables(name, argv, func == BIN_ENABLE);
} else if (OPT_ISSET(ops,'f'))
ht = shfunctab;
else if (OPT_ISSET(ops,'r'))
ht = reswdtab;
else if (OPT_ISSET(ops,'s'))
ht = sufaliastab;
else if (OPT_ISSET(ops,'a'))
ht = aliastab;
else
ht = builtintab;
/* Do we want to enable or disable? */
if (func == BIN_ENABLE) {
flags2 = DISABLED;
scanfunc = ht->enablenode;
} else {
flags1 = DISABLED;
scanfunc = ht->disablenode;
}
/* Given no arguments, print the names of the enabled/disabled elements *
* in this hash table. If func == BIN_ENABLE, then scanhashtable will *
* print nodes NOT containing the DISABLED flag, else scanhashtable will *
* print nodes containing the DISABLED flag. */
if (!*argv) {
queue_signals();
scanhashtable(ht, 1, flags1, flags2, ht->printnode, 0);
unqueue_signals();
return 0;
}
/* With -m option, treat arguments as glob patterns. */
if (OPT_ISSET(ops,'m')) {
for (; *argv; argv++) {
queue_signals();
/* parse pattern */
tokenize(*argv);
if ((pprog = patcompile(*argv, PAT_STATIC, 0)))
match += scanmatchtable(ht, pprog, 0, 0, 0, scanfunc, 0);
else {
untokenize(*argv);
zwarnnam(name, "bad pattern : %s", *argv);
returnval = 1;
}
unqueue_signals();
}
/* If we didn't match anything, we return 1. */
if (!match)
returnval = 1;
return returnval;
}
/* Take arguments literally -- do not glob */
queue_signals();
for (; *argv; argv++) {
if ((hn = ht->getnode2(ht, *argv))) {
scanfunc(hn, 0);
} else {
zwarnnam(name, "no such hash table element: %s", *argv);
returnval = 1;
}
}
unqueue_signals();
return returnval;
}
/* set: either set the shell options, or set the shell arguments, *
* or declare an array, or show various things */
/**/
int
bin_set(char *nam, char **args, UNUSED(Options ops), UNUSED(int func))
{
int action, optno, array = 0, hadopt = 0,
hadplus = 0, hadend = 0, sort = 0;
char **x, *arrayname = NULL;
/* Obsolescent sh compatibility: set - is the same as set +xv *
* and set - args is the same as set +xv -- args */
if (!EMULATION(EMULATE_ZSH) && *args && **args == '-' && !args[0][1]) {
dosetopt(VERBOSE, 0, 0, opts);
dosetopt(XTRACE, 0, 0, opts);
if (!args[1])
return 0;
}
/* loop through command line options (begins with "-" or "+") */
while (*args && (**args == '-' || **args == '+')) {
action = (**args == '-');
hadplus |= !action;
if(!args[0][1])
*args = "--";
while (*++*args) {
if(**args == Meta)
*++*args ^= 32;
if(**args != '-' || action)
hadopt = 1;
/* The pseudo-option `--' signifies the end of options. */
if (**args == '-') {
hadend = 1;
args++;
goto doneoptions;
} else if (**args == 'o') {
if (!*++*args)
args++;
if (!*args) {
printoptionstates(hadplus);
inittyptab();
return 0;
}
if(!(optno = optlookup(*args)))
zerrnam(nam, "no such option: %s", *args);
else if(dosetopt(optno, action, 0, opts))
zerrnam(nam, "can't change option: %s", *args);
break;
} else if(**args == 'A') {
if(!*++*args)
args++;
array = action ? 1 : -1;
arrayname = *args;
if (!arrayname)
goto doneoptions;
else if (!isset(KSHARRAYS))
{
args++;
goto doneoptions;
}
break;
} else if (**args == 's')
sort = action ? 1 : -1;
else {
if (!(optno = optlookupc(**args)))
zerrnam(nam, "bad option: -%c", **args);
else if(dosetopt(optno, action, 0, opts))
zerrnam(nam, "can't change option: -%c", **args);
}
}
args++;
}
if (errflag)
return 1;
doneoptions:
inittyptab();
/* Show the parameters, possibly with values */
queue_signals();
if (!arrayname)
{
if (!hadopt && !*args)
scanhashtable(paramtab, 1, 0, 0, paramtab->printnode,
hadplus ? PRINT_NAMEONLY : 0);
if (array) {
/* display arrays */
scanhashtable(paramtab, 1, PM_ARRAY, 0, paramtab->printnode,
hadplus ? PRINT_NAMEONLY : 0);
}
if (!*args && !hadend) {
unqueue_signals();
return 0;
}
}
if (sort)
strmetasort(args, sort < 0 ? SORTIT_BACKWARDS : 0, NULL);
if (array) {
/* create an array with the specified elements */
char **a = NULL, **y;
int len = arrlen(args);
if (array < 0 && (a = getaparam(arrayname)) && arrlen_gt(a, len)) {
a += len;
len += arrlen(a);
}
for (x = y = zalloc((len + 1) * sizeof(char *)); len--;) {
if (!*args)
args = a;
*y++ = ztrdup(*args++);
}
*y++ = NULL;
setaparam(arrayname, x);
} else {
/* set shell arguments */
freearray(pparams);
pparams = zarrdup(args);
}
unqueue_signals();
return 0;
}
/**** directory-handling builtins ****/
/**/
int doprintdir = 0; /* set in exec.c (for autocd, cdpath, etc.) */
/* pwd: display the name of the current directory */
/**/
int
bin_pwd(UNUSED(char *name), UNUSED(char **argv), Options ops, UNUSED(int func))
{
if (OPT_ISSET(ops,'r') || OPT_ISSET(ops,'P') ||
(isset(CHASELINKS) && !OPT_ISSET(ops,'L')))
printf("%s\n", zgetcwd());
else {
zputs(pwd, stdout);
putchar('\n');
}
return 0;
}
/* the directory stack */
/**/
mod_export LinkList dirstack;
/* dirs: list the directory stack, or replace it with a provided list */
/**/
int
bin_dirs(UNUSED(char *name), char **argv, Options ops, UNUSED(int func))
{
LinkList l;
queue_signals();
/* with -v, -p or no arguments display the directory stack */
if (!(*argv || OPT_ISSET(ops,'c')) || OPT_ISSET(ops,'v') ||
OPT_ISSET(ops,'p')) {
LinkNode node;
char *fmt;
int pos = 1;
/* with the -v option, display a numbered list, starting at zero */
if (OPT_ISSET(ops,'v')) {
printf("0\t");
fmt = "\n%d\t";
/* with the -p option, display entries one per line */
} else if (OPT_ISSET(ops,'p'))
fmt = "\n";
else
fmt = " ";
if (OPT_ISSET(ops,'l'))
zputs(pwd, stdout);
else
fprintdir(pwd, stdout);
for (node = firstnode(dirstack); node; incnode(node)) {
printf(fmt, pos++);
if (OPT_ISSET(ops,'l'))
zputs(getdata(node), stdout);
else
fprintdir(getdata(node), stdout);
}
unqueue_signals();
putchar('\n');
return 0;
}
/* replace the stack with the specified directories */
l = znewlinklist();
while (*argv)
zaddlinknode(l, ztrdup(*argv++));
freelinklist(dirstack, freestr);
dirstack = l;
unqueue_signals();
return 0;
}
/* cd, chdir, pushd, popd */
/**/
void
set_pwd_env(void)
{
Param pm;
/* update the PWD and OLDPWD shell parameters */
pm = (Param) paramtab->getnode(paramtab, "PWD");
if (pm && PM_TYPE(pm->node.flags) != PM_SCALAR) {
pm->node.flags &= ~PM_READONLY;
unsetparam_pm(pm, 0, 1);
}
pm = (Param) paramtab->getnode(paramtab, "OLDPWD");
if (pm && PM_TYPE(pm->node.flags) != PM_SCALAR) {
pm->node.flags &= ~PM_READONLY;
unsetparam_pm(pm, 0, 1);
}
assignsparam("PWD", ztrdup(pwd), 0);
assignsparam("OLDPWD", ztrdup(oldpwd), 0);
pm = (Param) paramtab->getnode(paramtab, "PWD");
if (!(pm->node.flags & PM_EXPORTED))
addenv(pm, pwd);
pm = (Param) paramtab->getnode(paramtab, "OLDPWD");
if (!(pm->node.flags & PM_EXPORTED))
addenv(pm, oldpwd);
}
/* set if we are resolving links to their true paths */
static int chasinglinks;
/* The main pwd changing function. The real work is done by other *
* functions. cd_get_dest() does the initial argument processing; *
* cd_do_chdir() actually changes directory, if possible; cd_new_pwd() *
* does the ancillary processing associated with actually changing *
* directory. */
/**/
int
bin_cd(char *nam, char **argv, Options ops, int func)
{
LinkNode dir;
if (isset(RESTRICTED)) {
zwarnnam(nam, "restricted");
return 1;
}
doprintdir = (doprintdir == -1);
chasinglinks = OPT_ISSET(ops,'P') ||
(isset(CHASELINKS) && !OPT_ISSET(ops,'L'));
queue_signals();
zpushnode(dirstack, ztrdup(pwd));
if (!(dir = cd_get_dest(nam, argv, OPT_ISSET(ops,'s'), func))) {
zsfree(getlinknode(dirstack));
unqueue_signals();
return 1;
}
cd_new_pwd(func, dir, OPT_ISSET(ops, 'q'));
unqueue_signals();
return 0;
}
/* Get directory to chdir to */
/**/
static LinkNode
cd_get_dest(char *nam, char **argv, int hard, int func)
{
LinkNode dir = NULL;
LinkNode target;
char *dest;
if (!argv[0]) {
if (func == BIN_POPD && !nextnode(firstnode(dirstack))) {
zwarnnam(nam, "directory stack empty");
return NULL;
}
if (func == BIN_PUSHD && unset(PUSHDTOHOME))
dir = nextnode(firstnode(dirstack));
if (dir)
zinsertlinknode(dirstack, dir, getlinknode(dirstack));
else if (func != BIN_POPD) {
if (!home) {
zwarnnam(nam, "HOME not set");
return NULL;
}
zpushnode(dirstack, ztrdup(home));
}
} else if (!argv[1]) {
int dd;
char *end;
doprintdir++;
if (!isset(POSIXCD) && argv[0][1] && (argv[0][0] == '+' || argv[0][0] == '-')
&& strspn(argv[0]+1, "0123456789") == strlen(argv[0]+1)) {
dd = zstrtol(argv[0] + 1, &end, 10);
if (*end == '\0') {
if ((argv[0][0] == '+') ^ isset(PUSHDMINUS))
for (dir = firstnode(dirstack); dir && dd; dd--, incnode(dir));
else
for (dir = lastnode(dirstack); dir != (LinkNode) dirstack && dd;
dd--, dir = prevnode(dir));
if (!dir || dir == (LinkNode) dirstack) {
zwarnnam(nam, "no such entry in dir stack");
return NULL;
}
}
}
if (!dir)
zpushnode(dirstack, ztrdup(strcmp(argv[0], "-")
? (doprintdir--, argv[0]) : oldpwd));
} else {
char *u, *d;
int len1, len2, len3;
if (!(u = strstr(pwd, argv[0]))) {
zwarnnam(nam, "string not in pwd: %s", argv[0]);
return NULL;
}
len1 = strlen(argv[0]);
len2 = strlen(argv[1]);
len3 = u - pwd;
d = (char *)zalloc(len3 + len2 + strlen(u + len1) + 1);
strncpy(d, pwd, len3);
strcpy(d + len3, argv[1]);
strcat(d, u + len1);
zpushnode(dirstack, d);
doprintdir++;
}
target = dir;
if (func == BIN_POPD) {
if (!dir) {
target = dir = firstnode(dirstack);
} else if (dir != firstnode(dirstack)) {
return dir;
}
dir = nextnode(dir);
}
if (!dir) {
dir = firstnode(dirstack);
}
if (!dir || !getdata(dir)) {
DPUTS(1, "Directory not set, not detected early enough");
return NULL;
}
if (!(dest = cd_do_chdir(nam, getdata(dir), hard))) {
if (!target)
zsfree(getlinknode(dirstack));
if (func == BIN_POPD)
zsfree(remnode(dirstack, dir));
return NULL;
}
if (dest != (char *)getdata(dir)) {
zsfree(getdata(dir));
setdata(dir, dest);
}
return target ? target : dir;
}
/* Change to given directory, if possible. This function works out *
* exactly how the directory should be interpreted, including cdpath *
* and CDABLEVARS. For each possible interpretation of the given *
* path, this calls cd_try_chdir(), which attempts to chdir to that *
* particular path. */
/**/
static char *
cd_do_chdir(char *cnam, char *dest, int hard)
{
char **pp, *ret;
int hasdot = 0, eno = ENOENT;
/*
* nocdpath indicates that cdpath should not be used.
* This is the case iff dest is a relative path
* whose first segment is . or .., but if the path is
* absolute then cdpath won't be used anyway.
*/
int nocdpath;
#ifdef __CYGWIN__
/*
* Normalize path under Cygwin to avoid messing with
* DOS style names with drives in them
*/
static char buf[PATH_MAX+1];
#ifdef HAVE_CYGWIN_CONV_PATH
cygwin_conv_path(CCP_WIN_A_TO_POSIX | CCP_RELATIVE, dest, buf,
PATH_MAX);
#else
#ifndef _SYS_CYGWIN_H
void cygwin_conv_to_posix_path(const char *, char *);
#endif
cygwin_conv_to_posix_path(dest, buf);
#endif
dest = buf;
#endif