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zsh/Src/options.c

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/*
* options.c - shell options
*
* 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.
*
*/
#include "zsh.mdh"
#include "options.pro"
/* current emulation (used to decide which set of option letters is used) */
/**/
int emulation;
/* the options; e.g. if opts[SHGLOB] != 0, SH_GLOB is turned on */
/**/
mod_export char opts[OPT_SIZE];
/* Option name hash table */
/**/
mod_export HashTable optiontab;
/* The canonical option name table */
#define OPT_CSH EMULATE_CSH
#define OPT_KSH EMULATE_KSH
#define OPT_SH EMULATE_SH
#define OPT_ZSH EMULATE_ZSH
#define OPT_ALL (OPT_CSH|OPT_KSH|OPT_SH|OPT_ZSH)
#define OPT_BOURNE (OPT_KSH|OPT_SH)
#define OPT_BSHELL (OPT_KSH|OPT_SH|OPT_ZSH)
#define OPT_NONBOURNE (OPT_ALL & ~OPT_BOURNE)
#define OPT_NONZSH (OPT_ALL & ~OPT_ZSH)
#define OPT_EMULATE (1<<5) /* option is relevant to emulation */
#define OPT_SPECIAL (1<<6) /* option should never be set by emulate() */
#define OPT_ALIAS (1<<7) /* option is an alias to an other option */
#define defset(X) (!!((X)->flags & emulation))
/*
* Note that option names should usually be fewer than 20 characters long
* to avoid formatting problems.
*/
static struct optname optns[] = {
{NULL, "aliases", OPT_EMULATE|OPT_ALL, ALIASESOPT},
{NULL, "allexport", OPT_EMULATE, ALLEXPORT},
{NULL, "alwayslastprompt", OPT_ALL, ALWAYSLASTPROMPT},
{NULL, "alwaystoend", 0, ALWAYSTOEND},
{NULL, "appendhistory", OPT_ALL, APPENDHISTORY},
{NULL, "autocd", OPT_EMULATE, AUTOCD},
{NULL, "autocontinue", 0, AUTOCONTINUE},
{NULL, "autolist", OPT_ALL, AUTOLIST},
{NULL, "automenu", OPT_ALL, AUTOMENU},
{NULL, "autonamedirs", 0, AUTONAMEDIRS},
{NULL, "autoparamkeys", OPT_ALL, AUTOPARAMKEYS},
{NULL, "autoparamslash", OPT_ALL, AUTOPARAMSLASH},
{NULL, "autopushd", 0, AUTOPUSHD},
{NULL, "autoremoveslash", OPT_ALL, AUTOREMOVESLASH},
{NULL, "autoresume", 0, AUTORESUME},
{NULL, "badpattern", OPT_EMULATE|OPT_NONBOURNE, BADPATTERN},
{NULL, "banghist", OPT_NONBOURNE, BANGHIST},
{NULL, "bareglobqual", OPT_EMULATE|OPT_ZSH, BAREGLOBQUAL},
{NULL, "bashautolist", 0, BASHAUTOLIST},
{NULL, "beep", OPT_ALL, BEEP},
{NULL, "bgnice", OPT_EMULATE|OPT_NONBOURNE, BGNICE},
{NULL, "braceccl", OPT_EMULATE, BRACECCL},
{NULL, "bsdecho", OPT_EMULATE|OPT_SH, BSDECHO},
{NULL, "cbases", 0, CBASES},
{NULL, "cdablevars", OPT_EMULATE, CDABLEVARS},
{NULL, "chasedots", OPT_EMULATE, CHASEDOTS},
{NULL, "chaselinks", OPT_EMULATE, CHASELINKS},
{NULL, "checkjobs", OPT_EMULATE|OPT_ZSH, CHECKJOBS},
{NULL, "clobber", OPT_EMULATE|OPT_ALL, CLOBBER},
{NULL, "completealiases", 0, COMPLETEALIASES},
{NULL, "completeinword", 0, COMPLETEINWORD},
{NULL, "correct", 0, CORRECT},
{NULL, "correctall", 0, CORRECTALL},
{NULL, "cshjunkiehistory", OPT_EMULATE|OPT_CSH, CSHJUNKIEHISTORY},
{NULL, "cshjunkieloops", OPT_EMULATE|OPT_CSH, CSHJUNKIELOOPS},
{NULL, "cshjunkiequotes", OPT_EMULATE|OPT_CSH, CSHJUNKIEQUOTES},
{NULL, "cshnullcmd", OPT_EMULATE|OPT_CSH, CSHNULLCMD},
{NULL, "cshnullglob", OPT_EMULATE|OPT_CSH, CSHNULLGLOB},
{NULL, "equals", OPT_EMULATE|OPT_ZSH, EQUALS},
{NULL, "errexit", OPT_EMULATE, ERREXIT},
{NULL, "exec", OPT_ALL, EXECOPT},
{NULL, "extendedglob", OPT_EMULATE, EXTENDEDGLOB},
{NULL, "extendedhistory", OPT_CSH, EXTENDEDHISTORY},
{NULL, "flowcontrol", OPT_ALL, FLOWCONTROL},
{NULL, "functionargzero", OPT_EMULATE|OPT_NONBOURNE, FUNCTIONARGZERO},
{NULL, "glob", OPT_EMULATE|OPT_ALL, GLOBOPT},
{NULL, "globalexport", OPT_EMULATE|OPT_ZSH, GLOBALEXPORT},
{NULL, "globalrcs", OPT_ALL, GLOBALRCS},
{NULL, "globassign", OPT_EMULATE|OPT_CSH, GLOBASSIGN},
{NULL, "globcomplete", 0, GLOBCOMPLETE},
{NULL, "globdots", OPT_EMULATE, GLOBDOTS},
{NULL, "globsubst", OPT_EMULATE|OPT_NONZSH, GLOBSUBST},
{NULL, "hashcmds", OPT_ALL, HASHCMDS},
{NULL, "hashdirs", OPT_ALL, HASHDIRS},
{NULL, "hashlistall", OPT_ALL, HASHLISTALL},
{NULL, "histallowclobber", 0, HISTALLOWCLOBBER},
{NULL, "histbeep", OPT_ALL, HISTBEEP},
{NULL, "histexpiredupsfirst", 0, HISTEXPIREDUPSFIRST},
{NULL, "histfindnodups", 0, HISTFINDNODUPS},
{NULL, "histignorealldups", 0, HISTIGNOREALLDUPS},
{NULL, "histignoredups", 0, HISTIGNOREDUPS},
{NULL, "histignorespace", 0, HISTIGNORESPACE},
{NULL, "histnofunctions", 0, HISTNOFUNCTIONS},
{NULL, "histnostore", 0, HISTNOSTORE},
{NULL, "histreduceblanks", 0, HISTREDUCEBLANKS},
{NULL, "histsavenodups", 0, HISTSAVENODUPS},
{NULL, "histverify", 0, HISTVERIFY},
{NULL, "hup", OPT_EMULATE|OPT_ZSH, HUP},
{NULL, "ignorebraces", OPT_EMULATE|OPT_SH, IGNOREBRACES},
{NULL, "ignoreeof", 0, IGNOREEOF},
{NULL, "incappendhistory", 0, INCAPPENDHISTORY},
{NULL, "interactive", OPT_SPECIAL, INTERACTIVE},
{NULL, "interactivecomments", OPT_BOURNE, INTERACTIVECOMMENTS},
{NULL, "ksharrays", OPT_EMULATE|OPT_BOURNE, KSHARRAYS},
{NULL, "kshautoload", OPT_EMULATE|OPT_BOURNE, KSHAUTOLOAD},
{NULL, "kshglob", OPT_EMULATE|OPT_KSH, KSHGLOB},
{NULL, "kshoptionprint", OPT_EMULATE|OPT_KSH, KSHOPTIONPRINT},
{NULL, "kshtypeset", OPT_EMULATE|OPT_KSH, KSHTYPESET},
{NULL, "listambiguous", OPT_ALL, LISTAMBIGUOUS},
{NULL, "listbeep", OPT_ALL, LISTBEEP},
{NULL, "listpacked", 0, LISTPACKED},
{NULL, "listrowsfirst", 0, LISTROWSFIRST},
{NULL, "listtypes", OPT_ALL, LISTTYPES},
{NULL, "localoptions", OPT_EMULATE|OPT_KSH, LOCALOPTIONS},
{NULL, "localtraps", OPT_EMULATE|OPT_KSH, LOCALTRAPS},
{NULL, "login", OPT_SPECIAL, LOGINSHELL},
{NULL, "longlistjobs", 0, LONGLISTJOBS},
{NULL, "magicequalsubst", OPT_EMULATE, MAGICEQUALSUBST},
{NULL, "mailwarning", 0, MAILWARNING},
{NULL, "markdirs", 0, MARKDIRS},
{NULL, "menucomplete", 0, MENUCOMPLETE},
{NULL, "monitor", OPT_SPECIAL, MONITOR},
{NULL, "multios", OPT_EMULATE|OPT_ZSH, MULTIOS},
{NULL, "nomatch", OPT_EMULATE|OPT_NONBOURNE, NOMATCH},
{NULL, "notify", OPT_ZSH, NOTIFY},
{NULL, "nullglob", OPT_EMULATE, NULLGLOB},
{NULL, "numericglobsort", OPT_EMULATE, NUMERICGLOBSORT},
{NULL, "octalzeroes", OPT_EMULATE|OPT_SH, OCTALZEROES},
{NULL, "overstrike", 0, OVERSTRIKE},
{NULL, "pathdirs", OPT_EMULATE, PATHDIRS},
{NULL, "posixbuiltins", OPT_EMULATE|OPT_BOURNE, POSIXBUILTINS},
{NULL, "printeightbit", 0, PRINTEIGHTBIT},
{NULL, "printexitvalue", 0, PRINTEXITVALUE},
{NULL, "privileged", OPT_SPECIAL, PRIVILEGED},
{NULL, "promptbang", OPT_KSH, PROMPTBANG},
{NULL, "promptcr", OPT_ALL, PROMPTCR},
{NULL, "promptpercent", OPT_NONBOURNE, PROMPTPERCENT},
{NULL, "promptsubst", OPT_KSH, PROMPTSUBST},
{NULL, "pushdignoredups", OPT_EMULATE, PUSHDIGNOREDUPS},
{NULL, "pushdminus", OPT_EMULATE, PUSHDMINUS},
{NULL, "pushdsilent", 0, PUSHDSILENT},
{NULL, "pushdtohome", OPT_EMULATE, PUSHDTOHOME},
{NULL, "rcexpandparam", OPT_EMULATE, RCEXPANDPARAM},
{NULL, "rcquotes", OPT_EMULATE, RCQUOTES},
{NULL, "rcs", OPT_ALL, RCS},
{NULL, "recexact", 0, RECEXACT},
{NULL, "restricted", OPT_SPECIAL, RESTRICTED},
{NULL, "rmstarsilent", OPT_BOURNE, RMSTARSILENT},
{NULL, "rmstarwait", 0, RMSTARWAIT},
{NULL, "sharehistory", OPT_KSH, SHAREHISTORY},
{NULL, "shfileexpansion", OPT_EMULATE|OPT_BOURNE, SHFILEEXPANSION},
{NULL, "shglob", OPT_EMULATE|OPT_BOURNE, SHGLOB},
{NULL, "shinstdin", OPT_SPECIAL, SHINSTDIN},
{NULL, "shnullcmd", OPT_EMULATE|OPT_BOURNE, SHNULLCMD},
{NULL, "shoptionletters", OPT_EMULATE|OPT_BOURNE, SHOPTIONLETTERS},
{NULL, "shortloops", OPT_EMULATE|OPT_NONBOURNE, SHORTLOOPS},
{NULL, "shwordsplit", OPT_EMULATE|OPT_BOURNE, SHWORDSPLIT},
{NULL, "singlecommand", OPT_SPECIAL, SINGLECOMMAND},
{NULL, "singlelinezle", OPT_KSH, SINGLELINEZLE},
{NULL, "sunkeyboardhack", 0, SUNKEYBOARDHACK},
{NULL, "transientrprompt", 0, TRANSIENTRPROMPT},
{NULL, "typesetsilent", OPT_EMULATE|OPT_BOURNE, TYPESETSILENT},
{NULL, "unset", OPT_EMULATE|OPT_BSHELL, UNSET},
{NULL, "verbose", 0, VERBOSE},
{NULL, "xtrace", 0, XTRACE},
{NULL, "zle", OPT_SPECIAL, USEZLE},
{NULL, "braceexpand", OPT_ALIAS, /* ksh/bash */ -IGNOREBRACES},
{NULL, "dotglob", OPT_ALIAS, /* bash */ GLOBDOTS},
{NULL, "hashall", OPT_ALIAS, /* bash */ HASHCMDS},
{NULL, "histappend", OPT_ALIAS, /* bash */ APPENDHISTORY},
{NULL, "histexpand", OPT_ALIAS, /* bash */ BANGHIST},
{NULL, "log", OPT_ALIAS, /* ksh */ -HISTNOFUNCTIONS},
{NULL, "mailwarn", OPT_ALIAS, /* bash */ MAILWARNING},
{NULL, "onecmd", OPT_ALIAS, /* bash */ SINGLECOMMAND},
{NULL, "physical", OPT_ALIAS, /* ksh/bash */ CHASELINKS},
{NULL, "promptvars", OPT_ALIAS, /* bash */ PROMPTSUBST},
{NULL, "stdin", OPT_ALIAS, /* ksh */ SHINSTDIN},
{NULL, "trackall", OPT_ALIAS, /* ksh */ HASHCMDS},
{NULL, "dvorak", 0, DVORAK},
{NULL, NULL, 0, 0}
};
/* Option letters */
#define optletters (isset(SHOPTIONLETTERS) ? kshletters : zshletters)
#define FIRST_OPT '0'
#define LAST_OPT 'y'
static short zshletters[LAST_OPT - FIRST_OPT + 1] = {
/* 0 */ CORRECT,
/* 1 */ PRINTEXITVALUE,
/* 2 */ -BADPATTERN,
/* 3 */ -NOMATCH,
/* 4 */ GLOBDOTS,
/* 5 */ NOTIFY,
/* 6 */ BGNICE,
/* 7 */ IGNOREEOF,
/* 8 */ MARKDIRS,
/* 9 */ AUTOLIST,
/* : */ 0,
/* ; */ 0,
/* < */ 0,
/* = */ 0,
/* > */ 0,
/* ? */ 0,
/* @ */ 0,
/* A */ 0, /* use with set for arrays */
/* B */ -BEEP,
/* C */ -CLOBBER,
/* D */ PUSHDTOHOME,
/* E */ PUSHDSILENT,
/* F */ -GLOBOPT,
/* G */ NULLGLOB,
/* H */ RMSTARSILENT,
/* I */ IGNOREBRACES,
/* J */ AUTOCD,
/* K */ -BANGHIST,
/* L */ SUNKEYBOARDHACK,
/* M */ SINGLELINEZLE,
/* N */ AUTOPUSHD,
/* O */ CORRECTALL,
/* P */ RCEXPANDPARAM,
/* Q */ PATHDIRS,
/* R */ LONGLISTJOBS,
/* S */ RECEXACT,
/* T */ CDABLEVARS,
/* U */ MAILWARNING,
/* V */ -PROMPTCR,
/* W */ AUTORESUME,
/* X */ LISTTYPES,
/* Y */ MENUCOMPLETE,
/* Z */ USEZLE,
/* [ */ 0,
/* \ */ 0,
/* ] */ 0,
/* ^ */ 0,
/* _ */ 0,
/* ` */ 0,
/* a */ ALLEXPORT,
/* b */ 0, /* in non-Bourne shells, end of options */
/* c */ 0, /* command follows */
/* d */ -GLOBALRCS,
/* e */ ERREXIT,
/* f */ -RCS,
/* g */ HISTIGNORESPACE,
/* h */ HISTIGNOREDUPS,
/* i */ INTERACTIVE,
/* j */ 0,
/* k */ INTERACTIVECOMMENTS,
/* l */ LOGINSHELL,
/* m */ MONITOR,
/* n */ -EXECOPT,
/* o */ 0, /* long option name follows */
/* p */ PRIVILEGED,
/* q */ 0,
/* r */ RESTRICTED,
/* s */ SHINSTDIN,
/* t */ SINGLECOMMAND,
/* u */ -UNSET,
/* v */ VERBOSE,
/* w */ CHASELINKS,
/* x */ XTRACE,
/* y */ SHWORDSPLIT,
};
static short kshletters[LAST_OPT - FIRST_OPT + 1] = {
/* 0 */ 0,
/* 1 */ 0,
/* 2 */ 0,
/* 3 */ 0,
/* 4 */ 0,
/* 5 */ 0,
/* 6 */ 0,
/* 7 */ 0,
/* 8 */ 0,
/* 9 */ 0,
/* : */ 0,
/* ; */ 0,
/* < */ 0,
/* = */ 0,
/* > */ 0,
/* ? */ 0,
/* @ */ 0,
/* A */ 0,
/* B */ 0,
/* C */ -CLOBBER,
/* D */ 0,
/* E */ 0,
/* F */ 0,
/* G */ 0,
/* H */ 0,
/* I */ 0,
/* J */ 0,
/* K */ 0,
/* L */ 0,
/* M */ 0,
/* N */ 0,
/* O */ 0,
/* P */ 0,
/* Q */ 0,
/* R */ 0,
/* S */ 0,
/* T */ 0,
/* U */ 0,
/* V */ 0,
/* W */ 0,
/* X */ MARKDIRS,
/* Y */ 0,
/* Z */ 0,
/* [ */ 0,
/* \ */ 0,
/* ] */ 0,
/* ^ */ 0,
/* _ */ 0,
/* ` */ 0,
/* a */ ALLEXPORT,
/* b */ NOTIFY,
/* c */ 0,
/* d */ 0,
/* e */ ERREXIT,
/* f */ -GLOBOPT,
/* g */ 0,
/* h */ 0,
/* i */ INTERACTIVE,
/* j */ 0,
/* k */ 0,
/* l */ LOGINSHELL,
/* m */ MONITOR,
/* n */ -EXECOPT,
/* o */ 0,
/* p */ PRIVILEGED,
/* q */ 0,
/* r */ RESTRICTED,
/* s */ SHINSTDIN,
/* t */ SINGLECOMMAND,
/* u */ -UNSET,
/* v */ VERBOSE,
/* w */ 0,
/* x */ XTRACE,
/* y */ 0,
};
/* Initialisation of the option name hash table */
/**/
static void
printoptionnode(HashNode hn, int set)
{
Optname on = (Optname) hn;
int optno = on->optno;
if (optno < 0)
optno = -optno;
if (isset(KSHOPTIONPRINT)) {
if (defset(on))
printf("no%-19s %s\n", on->nam, isset(optno) ? "off" : "on");
else
printf("%-21s %s\n", on->nam, isset(optno) ? "on" : "off");
} else if (set == (isset(optno) ^ defset(on))) {
if (set ^ isset(optno))
fputs("no", stdout);
puts(on->nam);
}
}
/**/
void
createoptiontable(void)
{
Optname on;
optiontab = newhashtable(101, "optiontab", NULL);
optiontab->hash = hasher;
optiontab->emptytable = NULL;
optiontab->filltable = NULL;
optiontab->cmpnodes = strcmp;
optiontab->addnode = addhashnode;
optiontab->getnode = gethashnode;
optiontab->getnode2 = gethashnode2;
optiontab->removenode = NULL;
optiontab->disablenode = disablehashnode;
optiontab->enablenode = enablehashnode;
optiontab->freenode = NULL;
optiontab->printnode = printoptionnode;
for (on = optns; on->nam; on++)
optiontab->addnode(optiontab, on->nam, on);
}
/* Setting of default options */
/**/
static void
setemulate(HashNode hn, int fully)
{
Optname on = (Optname) hn;
/* Set options: each non-special option is set according to the *
* current emulation mode if either it is considered relevant *
* to emulation or we are doing a full emulation (as indicated *
* by the `fully' parameter). */
if (!(on->flags & OPT_ALIAS) &&
((fully && !(on->flags & OPT_SPECIAL)) ||
(on->flags & OPT_EMULATE)))
opts[on->optno] = defset(on);
}
/**/
void
emulate(const char *zsh_name, int fully)
{
char ch = *zsh_name;
if (ch == 'r')
ch = zsh_name[1];
/* Work out the new emulation mode */
if (ch == 'c')
emulation = EMULATE_CSH;
else if (ch == 'k')
emulation = EMULATE_KSH;
else if (ch == 's' || ch == 'b')
emulation = EMULATE_SH;
else
emulation = EMULATE_ZSH;
scanhashtable(optiontab, 0, 0, 0, setemulate, fully);
}
/* setopt, unsetopt */
/**/
static void
setoption(HashNode hn, int value)
{
dosetopt(((Optname) hn)->optno, value, 0);
}
/**/
int
bin_setopt(char *nam, char **args, char *ops, int isun)
{
int action, optno, match = 0;
/* With no arguments or options, display options. */
if (!*args) {
scanhashtable(optiontab, 1, 0, OPT_ALIAS, optiontab->printnode, !isun);
return 0;
}
/* loop through command line options (begins with "-" or "+") */
while (*args && (**args == '-' || **args == '+')) {
action = (**args == '-') ^ isun;
if(!args[0][1])
*args = "--";
while (*++*args) {
if(**args == Meta)
*++*args ^= 32;
/* The pseudo-option `--' signifies the end of options. */
if (**args == '-') {
args++;
goto doneoptions;
} else if (**args == 'o') {
if (!*++*args)
args++;
if (!*args) {
zwarnnam(nam, "string expected after -o", NULL, 0);
inittyptab();
return 1;
}
if(!(optno = optlookup(*args)))
zwarnnam(nam, "no such option: %s", *args, 0);
else if(dosetopt(optno, action, 0))
zwarnnam(nam, "can't change option: %s", *args, 0);
break;
} else if(**args == 'm') {
match = 1;
} else {
if (!(optno = optlookupc(**args)))
zwarnnam(nam, "bad option: -%c", NULL, **args);
else if(dosetopt(optno, action, 0))
zwarnnam(nam, "can't change option: -%c", NULL, **args);
}
}
args++;
}
doneoptions:
if (!match) {
/* Not globbing the arguments -- arguments are simply option names. */
while (*args) {
if(!(optno = optlookup(*args++)))
zwarnnam(nam, "no such option: %s", args[-1], 0);
else if(dosetopt(optno, !isun, 0))
zwarnnam(nam, "can't change option: %s", args[-1], 0);
}
} else {
/* Globbing option (-m) set. */
while (*args) {
Patprog pprog;
char *s, *t;
t = s = dupstring(*args);
while (*t)
if (*t == '_')
chuck(t);
else {
*t = tulower(*t);
t++;
}
/* Expand the current arg. */
tokenize(s);
if (!(pprog = patcompile(s, PAT_STATIC, NULL))) {
zwarnnam(nam, "bad pattern: %s", *args, 0);
continue;
}
/* Loop over expansions. */
scanmatchtable(optiontab, pprog, 0, OPT_ALIAS, setoption, !isun);
args++;
}
}
inittyptab();
return 0;
}
/* Identify an option name */
/**/
mod_export int
optlookup(char const *name)
{
char *s, *t;
Optname n;
s = t = dupstring(name);
/* exorcise underscores, and change to lowercase */
while (*t)
if (*t == '_')
chuck(t);
else {
*t = tulower(*t);
t++;
}
/* look up name in the table */
if (s[0] == 'n' && s[1] == 'o' &&
(n = (Optname) optiontab->getnode(optiontab, s + 2))) {
return -n->optno;
} else if ((n = (Optname) optiontab->getnode(optiontab, s)))
return n->optno;
else
return OPT_INVALID;
}
/* Identify an option letter */
/**/
int
optlookupc(char c)
{
if(c < FIRST_OPT || c > LAST_OPT)
return 0;
return optletters[c - FIRST_OPT];
}
/**/
static void
restrictparam(char *nam)
{
Param pm = (Param) paramtab->getnode(paramtab, nam);
if (pm) {
pm->flags |= PM_SPECIAL | PM_RESTRICTED;
return;
}
createparam(nam, PM_SCALAR | PM_UNSET | PM_SPECIAL | PM_RESTRICTED);
}
/* list of restricted parameters which are not otherwise special */
static char *rparams[] = {
"SHELL", "HISTFILE", "LD_LIBRARY_PATH", "LD_AOUT_LIBRARY_PATH",
"LD_PRELOAD", "LD_AOUT_PRELOAD", NULL
};
/* Set or unset an option, as a result of user request. The option *
* number may be negative, indicating that the sense is reversed *
* from the usual meaning of the option. */
/**/
mod_export int
dosetopt(int optno, int value, int force)
{
if(!optno)
return -1;
if(optno < 0) {
optno = -optno;
value = !value;
}
if (optno == RESTRICTED) {
if (isset(RESTRICTED))
return value ? 0 : -1;
if (value) {
char **s;
for (s = rparams; *s; s++)
restrictparam(*s);
}
} else if(!force && optno == EXECOPT && !value && interact) {
/* cannot set noexec when interactive */
return -1;
} else if(!force && (optno == INTERACTIVE || optno == SHINSTDIN ||
optno == SINGLECOMMAND)) {
if (opts[optno] == value)
return 0;
/* it is not permitted to change the value of these options */
return -1;
} else if(!force && optno == USEZLE && value) {
/* we require a terminal in order to use ZLE */
if(!interact || SHTTY == -1 || !shout)
return -1;
} else if(optno == PRIVILEGED && !value) {
/* unsetting PRIVILEGED causes the shell to make itself unprivileged */
#ifdef HAVE_SETUID
setuid(getuid());
setgid(getgid());
#endif /* HAVE_SETUID */
#ifndef JOB_CONTROL
} else if(optno == MONITOR && value) {
return -1;
#endif /* not JOB_CONTROL */
#ifdef GETPWNAM_FAKED
} else if(optno == CDABLEVARS && value) {
return -1;
#endif /* GETPWNAM_FAKED */
}
opts[optno] = value;
if (optno == BANGHIST || optno == SHINSTDIN)
inittyptab();
return 0;
}
/* Function to get value for special parameter `-' */
/**/
char *
dashgetfn(Param pm)
{
static char buf[LAST_OPT - FIRST_OPT + 2];
char *val = buf;
int i;
for(i = 0; i <= LAST_OPT - FIRST_OPT; i++) {
int optno = optletters[i];
if(optno && ((optno > 0) ? isset(optno) : unset(-optno)))
*val++ = FIRST_OPT + i;
}
*val = '\0';
return buf;
}
/* Print option list for --help */
/**/
void
printoptionlist(void)
{
short *lp;
char c;
printf("\nNamed options:\n");
scanhashtable(optiontab, 1, 0, OPT_ALIAS, printoptionlist_printoption, 0);
printf("\nOption aliases:\n");
scanhashtable(optiontab, 1, OPT_ALIAS, 0, printoptionlist_printoption, 0);
printf("\nOption letters:\n");
for(lp = optletters, c = FIRST_OPT; c <= LAST_OPT; lp++, c++) {
if(!*lp)
continue;
printf(" -%c ", c);
printoptionlist_printequiv(*lp);
}
}
/**/
static void
printoptionlist_printoption(HashNode hn, int ignored)
{
Optname on = (Optname) hn;
if(on->flags & OPT_ALIAS) {
printf(" --%-19s ", on->nam);
printoptionlist_printequiv(on->optno);
} else
printf(" --%s\n", on->nam);
}
/**/
static void
printoptionlist_printequiv(int optno)
{
int isneg = optno < 0;
optno *= (isneg ? -1 : 1);
printf(" equivalent to --%s%s\n", isneg ? "no-" : "", optns[optno-1].nam);
}
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