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1897a361bf
zsh/Src/init.c
Wayne Davison e3e22f715c Fixed a bug where the call to function "preexec" might pass the wrong 
history line.  Added two extra args to preexec to give the user more
info on the command that is about to be executed.
2001-04-11 05:26:26 +00:00

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/*
* init.c - main loop and initialization routines
*
* 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 "zshpaths.h"
#include "zshxmods.h"
#include "init.pro"
#include "version.h"
/**/
int noexitct = 0;
/* buffer for $_ and its length */
/**/
char *underscore;
/**/
int underscorelen, underscoreused;
/* what level of sourcing we are at */
/**/
int sourcelevel;
/* the shell tty fd */
/**/
mod_export int SHTTY;
/* the FILE attached to the shell tty */
/**/
mod_export FILE *shout;
/* termcap strings */
/**/
mod_export char *tcstr[TC_COUNT];
/* lengths of each termcap string */
/**/
mod_export int tclen[TC_COUNT];
/* Values of the li, co and am entries */
/**/
int tclines, tccolumns;
/**/
mod_export int hasam;
/* Pointer to read-key function from zle */
/**/
mod_export int (*getkeyptr) _((int));
/* SIGCHLD mask */
/**/
mod_export sigset_t sigchld_mask;
/**/
mod_export struct hookdef zshhooks[] = {
HOOKDEF("exit", NULL, HOOKF_ALL),
HOOKDEF("before_trap", NULL, HOOKF_ALL),
HOOKDEF("after_trap", NULL, HOOKF_ALL),
};
/* keep executing lists until EOF found */
/**/
void
loop(int toplevel, int justonce)
{
Eprog prog;
pushheap();
for (;;) {
freeheap();
errflag = 0;
hbegin(1); /* init history mech */
if (isset(SHINSTDIN)) {
setblock_stdin();
if (interact) {
int hstop = stophist;
stophist = 3;
preprompt();
stophist = hstop;
}
}
intr(); /* interrupts on */
lexinit(); /* initialize lexical state */
if (!(prog = parse_event())) { /* if we couldn't parse a list */
hend(NULL);
if ((tok == ENDINPUT && !errflag) ||
(tok == LEXERR && (!isset(SHINSTDIN) || !toplevel)) ||
justonce)
break;
continue;
}
if (hend(prog)) {
int toksav = tok;
Eprog preprog;
if (toplevel && (preprog = getshfunc("preexec")) != &dummy_eprog) {
LinkList args;
int osc = sfcontext;
char *cmdstr;
args = znewlinklist();
zaddlinknode(args, "preexec");
/* If curline got dumped from the history, we don't know
* what the user typed. */
if (hist_ring && curline.histnum == curhist)
zaddlinknode(args, hist_ring->text);
else
zaddlinknode(args, "");
zaddlinknode(args, getjobtext(prog, NULL));
zaddlinknode(args, cmdstr = getpermtext(prog, NULL));
sfcontext = SFC_HOOK;
doshfunc("preexec", preprog, args, 0, 1);
sfcontext = osc;
zsfree(cmdstr);
freelinklist(args, (FreeFunc) NULL);
errflag = 0;
}
if (stopmsg) /* unset 'you have stopped jobs' flag */
stopmsg--;
execode(prog, 0, 0);
if (toplevel)
freeeprogs();
tok = toksav;
if (toplevel)
noexitct = 0;
}
if (ferror(stderr)) {
zerr("write error", NULL, 0);
clearerr(stderr);
}
if (subsh) /* how'd we get this far in a subshell? */
exit(lastval);
if (((!interact || sourcelevel) && errflag) || retflag)
break;
if (trapreturn) {
lastval = trapreturn;
trapreturn = 0;
}
if (isset(SINGLECOMMAND) && toplevel) {
if (sigtrapped[SIGEXIT])
dotrap(SIGEXIT);
exit(lastval);
}
if (justonce)
break;
}
popheap();
}
static char *cmd;
static int restricted;
/**/
void
parseargs(char **argv)
{
int optionbreak = 0;
char **x;
int action, optno;
LinkList paramlist;
argzero = *argv++;
SHIN = 0;
/* There's a bit of trickery with opts[INTERACTIVE] here. It starts *
* at a value of 2 (instead of 1) or 0. If it is explicitly set on *
* the command line, it goes to 1 or 0. If input is coming from *
* somewhere that normally makes the shell non-interactive, we do *
* "opts[INTERACTIVE] &= 1", so that only a *default* on state will *
* be changed. At the end of the function, a value of 2 gets *
* changed to 1. */
opts[INTERACTIVE] = isatty(0) ? 2 : 0;
opts[SHINSTDIN] = 0;
opts[SINGLECOMMAND] = 0;
/* loop through command line options (begins with "-" or "+") */
while (!optionbreak && *argv && (**argv == '-' || **argv == '+')) {
char *args = *argv;
action = (**argv == '-');
if (!argv[0][1])
*argv = "--";
while (*++*argv) {
if (**argv == '-') {
if(!argv[0][1]) {
/* The pseudo-option `--' signifies the end of options. */
argv++;
goto doneoptions;
}
if(*argv != args+1 || **argv != '-')
goto badoptionstring;
/* GNU-style long options */
++*argv;
if (!strcmp(*argv, "version")) {
printf("zsh %s (%s-%s-%s)\n",
ZSH_VERSION, MACHTYPE, VENDOR, OSTYPE);
exit(0);
}
if (!strcmp(*argv, "help")) {
printhelp();
exit(0);
}
/* `-' characters are allowed in long options */
for(args = *argv; *args; args++)
if(*args == '-')
*args = '_';
goto longoptions;
}
if (unset(SHOPTIONLETTERS) && **argv == 'b') {
/* -b ends options at the end of this argument */
optionbreak = 1;
} else if (**argv == 'c') {
/* -c command */
cmd = *argv;
opts[INTERACTIVE] &= 1;
opts[SHINSTDIN] = 0;
scriptname = ztrdup("zsh");
} else if (**argv == 'o') {
if (!*++*argv)
argv++;
if (!*argv) {
zerr("string expected after -o", NULL, 0);
exit(1);
}
longoptions:
if (!(optno = optlookup(*argv))) {
zerr("no such option: %s", *argv, 0);
exit(1);
} else if (optno == RESTRICTED)
restricted = action;
else
dosetopt(optno, action, 1);
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, 0);
exit(1);
}
break;
} else {
if (!(optno = optlookupc(**argv))) {
zerr("bad option: -%c", NULL, **argv);
exit(1);
} else if (optno == RESTRICTED)
restricted = action;
else
dosetopt(optno, action, 1);
}
}
argv++;
}
doneoptions:
paramlist = znewlinklist();
if (cmd) {
if (!*argv) {
zerr("string expected after -%s", cmd, 0);
exit(1);
}
cmd = *argv++;
}
if (*argv) {
if (unset(SHINSTDIN)) {
argzero = *argv;
if (!cmd)
SHIN = movefd(open(unmeta(argzero), O_RDONLY | O_NOCTTY));
if (SHIN == -1) {
zerr("can't open input file: %s", argzero, 0);
exit(1);
}
opts[INTERACTIVE] &= 1;
argv++;
}
while (*argv)
zaddlinknode(paramlist, ztrdup(*argv++));
} else
opts[SHINSTDIN] = 1;
if(isset(SINGLECOMMAND))
opts[INTERACTIVE] &= 1;
opts[INTERACTIVE] = !!opts[INTERACTIVE];
pparams = x = (char **) zcalloc((countlinknodes(paramlist) + 1) * sizeof(char *));
while ((*x++ = (char *)getlinknode(paramlist)));
free(paramlist);
argzero = ztrdup(argzero);
}
/**/
static void
printhelp(void)
{
printf("Usage: %s [<options>] [<argument> ...]\n", argzero);
printf("\nSpecial options:\n");
printf(" --help show this message, then exit\n");
printf(" --version show zsh version number, then exit\n");
if(unset(SHOPTIONLETTERS))
printf(" -b end option processing, like --\n");
printf(" -c take first argument as a command to execute\n");
printf(" -o OPTION set an option by name (see below)\n");
printf("\nNormal options are named. An option may be turned on by\n");
printf("`-o OPTION', `--OPTION', `+o no_OPTION' or `+-no-OPTION'. An\n");
printf("option may be turned off by `-o no_OPTION', `--no-OPTION',\n");
printf("`+o OPTION' or `+-OPTION'. Options are listed below only in\n");
printf("`--OPTION' or `--no-OPTION' form.\n");
printoptionlist();
}
/**/
mod_export void
init_io(void)
{
long ttpgrp;
static char outbuf[BUFSIZ], errbuf[BUFSIZ];
#ifdef RSH_BUG_WORKAROUND
int i;
#endif
/* stdout, stderr fully buffered */
#ifdef _IOFBF
setvbuf(stdout, outbuf, _IOFBF, BUFSIZ);
setvbuf(stderr, errbuf, _IOFBF, BUFSIZ);
#else
setbuffer(stdout, outbuf, BUFSIZ);
setbuffer(stderr, errbuf, BUFSIZ);
#endif
/* This works around a bug in some versions of in.rshd. *
* Currently this is not defined by default. */
#ifdef RSH_BUG_WORKAROUND
if (cmd) {
for (i = 3; i < 10; i++)
close(i);
}
#endif
if (shout) {
fclose(shout);
shout = 0;
}
if (SHTTY != -1) {
zclose(SHTTY);
SHTTY = -1;
}
/* Send xtrace output to stderr -- see execcmd() */
xtrerr = stderr;
/* Make sure the tty is opened read/write. */
if (isatty(0)) {
zsfree(ttystrname);
if ((ttystrname = ztrdup(ttyname(0)))) {
SHTTY = movefd(open(ttystrname, O_RDWR | O_NOCTTY));
#ifdef TIOCNXCL
/*
* See if the terminal claims to be busy. If so, and fd 0
* is a terminal, try and set non-exclusive use for that.
* This is something to do with Solaris over-cleverness.
*/
if (SHTTY == -1 && errno == EBUSY)
ioctl(0, TIOCNXCL, 0);
#endif
}
/*
* xterm, rxvt and probably all terminal emulators except
* dtterm on Solaris 2.6 & 7 have a bug. Applications are
* unable to open /dev/tty or /dev/pts/<terminal number here>
* because something in Sun's STREAMS modules doesn't like
* it. The open() call fails with EBUSY which is not even
* listed as a possibility in the open(2) man page. So we'll
* try to outsmart The Company. -- <dave@srce.hr>
*
* Presumably there's no harm trying this on any OS, given that
* isatty(0) worked but opening the tty didn't. Possibly we won't
* get the tty read/write, but it's the best we can do -- pws
*
* Try both stdin and stdout before trying /dev/tty. -- Bart
*/
#if defined(HAVE_FCNTL_H) && defined(F_GETFL)
#define rdwrtty(fd) ((fcntl(fd, F_GETFL, 0) & O_RDWR) == O_RDWR)
#else
#define rdwrtty(fd) 1
#endif
if (SHTTY == -1 && rdwrtty(0)) {
SHTTY = movefd(dup(0));
}
}
if (SHTTY == -1 && isatty(1) && rdwrtty(1) &&
(SHTTY = movefd(dup(1))) != -1) {
zsfree(ttystrname);
ttystrname = ztrdup(ttyname(1));
}
if (SHTTY == -1 &&
(SHTTY = movefd(open("/dev/tty", O_RDWR | O_NOCTTY))) != -1) {
zsfree(ttystrname);
ttystrname = ztrdup(ttyname(SHTTY));
}
if (SHTTY == -1) {
zsfree(ttystrname);
ttystrname = ztrdup("");
} else if (!ttystrname) {
ttystrname = ztrdup("/dev/tty");
}
/* We will only use zle if shell is interactive, *
* SHTTY != -1, and shout != 0 */
if (interact && SHTTY != -1) {
init_shout();
if(!shout)
opts[USEZLE] = 0;
} else
opts[USEZLE] = 0;
#ifdef JOB_CONTROL
/* If interactive, make the shell the foreground process */
if (opts[MONITOR] && interact && (SHTTY != -1)) {
if ((mypgrp = GETPGRP()) > 0) {
while ((ttpgrp = gettygrp()) != -1 && ttpgrp != mypgrp) {
sleep(1); /* give parent time to change pgrp */
mypgrp = GETPGRP();
if (mypgrp == mypid)
attachtty(mypgrp);
if (mypgrp == gettygrp())
break;
killpg(mypgrp, SIGTTIN);
mypgrp = GETPGRP();
}
} else
opts[MONITOR] = 0;
} else
opts[MONITOR] = 0;
#else
opts[MONITOR] = 0;
#endif
}
/**/
mod_export void
init_shout(void)
{
static char shoutbuf[BUFSIZ];
#if defined(JOB_CONTROL) && defined(TIOCSETD) && defined(NTTYDISC)
int ldisc = NTTYDISC;
ioctl(SHTTY, TIOCSETD, (char *)&ldisc);
#endif
/* Associate terminal file descriptor with a FILE pointer */
shout = fdopen(SHTTY, "w");
#ifdef _IOFBF
setvbuf(shout, shoutbuf, _IOFBF, BUFSIZ);
#endif
gettyinfo(&shttyinfo); /* get tty state */
#if defined(__sgi)
if (shttyinfo.tio.c_cc[VSWTCH] <= 0) /* hack for irises */
shttyinfo.tio.c_cc[VSWTCH] = CSWTCH;
#endif
}
/* names of the termcap strings we want */
static char *tccapnams[TC_COUNT] = {
"cl", "le", "LE", "nd", "RI", "up", "UP", "do",
"DO", "dc", "DC", "ic", "IC", "cd", "ce", "al", "dl", "ta",
"md", "so", "us", "me", "se", "ue", "ch",
"ku", "kd", "kl", "kr"
};
/* Initialise termcap */
/**/
mod_export int
init_term(void)
{
#ifndef TGETENT_ACCEPTS_NULL
static char termbuf[2048]; /* the termcap buffer */
#endif
if (!*term) {
termflags |= TERM_UNKNOWN;
return 0;
}
/* unset zle if using zsh under emacs */
if (!strcmp(term, "emacs"))
opts[USEZLE] = 0;
#ifdef TGETENT_ACCEPTS_NULL
/* If possible, we let tgetent allocate its own termcap buffer */
if (tgetent(NULL, term) != 1) {
#else
if (tgetent(termbuf, term) != 1) {
#endif
if (isset(INTERACTIVE))
zerr("can't find termcap info for %s", term, 0);
errflag = 0;
termflags |= TERM_BAD;
return 0;
} else {
char tbuf[1024], *pp;
int t0;
termflags &= ~TERM_BAD;
termflags &= ~TERM_UNKNOWN;
for (t0 = 0; t0 != TC_COUNT; t0++) {
pp = tbuf;
zsfree(tcstr[t0]);
/* AIX tgetstr() ignores second argument */
if (!(pp = tgetstr(tccapnams[t0], &pp)))
tcstr[t0] = NULL, tclen[t0] = 0;
else {
tclen[t0] = strlen(pp);
tcstr[t0] = (char *) zalloc(tclen[t0] + 1);
memcpy(tcstr[t0], pp, tclen[t0] + 1);
}
}
/* check whether terminal has automargin (wraparound) capability */
hasam = tgetflag("am");
tclines = tgetnum("li");
tccolumns = tgetnum("co");
/* if there's no termcap entry for cursor up, use single line mode: *
* this is flagged by termflags which is examined in zle_refresh.c *
*/
if (tccan(TCUP))
termflags &= ~TERM_NOUP;
else {
tcstr[TCUP] = NULL;
termflags |= TERM_NOUP;
}
/* if there's no termcap entry for cursor left, use \b. */
if (!tccan(TCLEFT)) {
tcstr[TCLEFT] = ztrdup("\b");
tclen[TCLEFT] = 1;
}
/* if the termcap entry for down is \n, don't use it. */
if (tccan(TCDOWN) && tcstr[TCDOWN][0] == '\n') {
tclen[TCDOWN] = 0;
zsfree(tcstr[TCDOWN]);
tcstr[TCDOWN] = NULL;
}
/* if there's no termcap entry for clear, use ^L. */
if (!tccan(TCCLEARSCREEN)) {
tcstr[TCCLEARSCREEN] = ztrdup("\14");
tclen[TCCLEARSCREEN] = 1;
}
}
return 1;
}
/* Initialize lots of global variables and hash tables */
/**/
void
setupvals(void)
{
#ifdef HAVE_GETPWUID
struct passwd *pswd;
#endif
struct timezone dummy_tz;
char *ptr;
#ifdef HAVE_GETRLIMIT
int i;
#endif
#if defined(SITEFPATH_DIR) || defined(FPATH_DIR)
char **fpathptr;
# if defined(FPATH_DIR) && defined(FPATH_SUBDIRS)
char *fpath_subdirs[] = FPATH_SUBDIRS;
int j;
# endif
# ifdef SITEFPATH_DIR
int fpathlen = 1;
# else
int fpathlen = 0;
# endif
#endif
addhookdefs(argzero, zshhooks, sizeof(zshhooks)/sizeof(*zshhooks));
init_eprog();
zero_mnumber.type = MN_INTEGER;
zero_mnumber.u.l = 0;
getkeyptr = NULL;
lineno = 1;
noeval = 0;
curhist = 0;
histsiz = DEFAULT_HISTSIZE;
inithist();
cmdstack = (unsigned char *) zalloc(CMDSTACKSZ);
cmdsp = 0;
bangchar = '!';
hashchar = '#';
hatchar = '^';
termflags = TERM_UNKNOWN;
curjob = prevjob = coprocin = coprocout = -1;
gettimeofday(&shtimer, &dummy_tz); /* init $SECONDS */
srand((unsigned int)(shtimer.tv_sec + shtimer.tv_usec)); /* seed $RANDOM */
/* Set default path */
path = (char **) zalloc(sizeof(*path) * 5);
path[0] = ztrdup("/bin");
path[1] = ztrdup("/usr/bin");
path[2] = ztrdup("/usr/ucb");
path[3] = ztrdup("/usr/local/bin");
path[4] = NULL;
cdpath = mkarray(NULL);
manpath = mkarray(NULL);
fignore = mkarray(NULL);
#if defined(SITEFPATH_DIR) || defined(FPATH_DIR)
# ifdef FPATH_DIR
# ifdef FPATH_SUBDIRS
fpathlen += sizeof(fpath_subdirs)/sizeof(char *);
# else
fpathlen++;
# endif
# endif
fpath = fpathptr = (char **)zalloc((fpathlen+1)*sizeof(char *));
# ifdef SITEFPATH_DIR
*fpathptr++ = ztrdup(SITEFPATH_DIR);
fpathlen--;
# endif
# ifdef FPATH_DIR
# ifdef FPATH_SUBDIRS
for (j = 0; j < fpathlen; j++)
*fpathptr++ = tricat(FPATH_DIR, "/", fpath_subdirs[j]);
# else
*fpathptr++ = ztrdup(FPATH_DIR);
# endif
# endif
*fpathptr = NULL;
#else
fpath = mkarray(NULL);
#endif
mailpath = mkarray(NULL);
watch = mkarray(NULL);
psvar = mkarray(NULL);
module_path = mkarray(ztrdup(MODULE_DIR));
modules = znewlinklist();
linkedmodules = znewlinklist();
/* Set default prompts */
if(unset(INTERACTIVE)) {
prompt = ztrdup("");
prompt2 = ztrdup("");
} else if (emulation == EMULATE_KSH || emulation == EMULATE_SH) {
prompt = ztrdup(privasserted() ? "# " : "$ ");
prompt2 = ztrdup("> ");
} else {
prompt = ztrdup("%m%# ");
prompt2 = ztrdup("%_> ");
}
prompt3 = ztrdup("?# ");
prompt4 = (emulation == EMULATE_KSH || emulation == EMULATE_SH)
? ztrdup("+ ") : ztrdup("+%N:%i> ");
sprompt = ztrdup("zsh: correct '%R' to '%r' [nyae]? ");
ifs = ztrdup(DEFAULT_IFS);
wordchars = ztrdup(DEFAULT_WORDCHARS);
postedit = ztrdup("");
underscore = (char *) zalloc(underscorelen = 32);
underscoreused = 1;
*underscore = '\0';
zoptarg = ztrdup("");
zoptind = 1;
ppid = (zlong) getppid();
mypid = (zlong) getpid();
term = ztrdup("");
nullcmd = ztrdup("cat");
readnullcmd = ztrdup("more");
/* We cache the uid so we know when to *
* recheck the info for `USERNAME' */
cached_uid = getuid();
/* Get password entry and set info for `HOME' and `USERNAME' */
#ifdef HAVE_GETPWUID
if ((pswd = getpwuid(cached_uid))) {
home = metafy(pswd->pw_dir, -1, META_DUP);
cached_username = ztrdup(pswd->pw_name);
} else
#endif /* HAVE_GETPWUID */
{
home = ztrdup("/");
cached_username = ztrdup("");
}
/* Try a cheap test to see if we can *
* initialize `PWD' from `HOME' */
if (ispwd(home))
pwd = ztrdup(home);
else if ((ptr = zgetenv("PWD")) && ispwd(ptr))
pwd = ztrdup(ptr);
else
pwd = metafy(zgetcwd(), -1, META_DUP);
oldpwd = ztrdup(pwd); /* initialize `OLDPWD' = `PWD' */
inittyptab(); /* initialize the ztypes table */
initlextabs(); /* initialize lexing tables */
createreswdtable(); /* create hash table for reserved words */
createaliastable(); /* create hash table for aliases */
createcmdnamtable(); /* create hash table for external commands */
createshfunctable(); /* create hash table for shell functions */
createbuiltintable(); /* create hash table for builtin commands */
createnameddirtable(); /* create hash table for named directories */
createparamtable(); /* create paramater hash table */
condtab = NULL;
wrappers = NULL;
#ifdef TIOCGWINSZ
adjustwinsize(0);
#else
/* columns and lines are normally zero, unless something different *
* was inhereted from the environment. If either of them are zero *
* the setiparam calls below set them to the defaults from termcap */
setiparam("COLUMNS", columns);
setiparam("LINES", lines);
#endif
#ifdef HAVE_GETRLIMIT
for (i = 0; i != RLIM_NLIMITS; i++) {
getrlimit(i, current_limits + i);
limits[i] = current_limits[i];
}
#endif
breaks = loops = 0;
lastmailcheck = time(NULL);
locallevel = sourcelevel = 0;
sfcontext = SFC_NONE;
trapreturn = 0;
noerrexit = -1;
nohistsave = 1;
dirstack = znewlinklist();
bufstack = znewlinklist();
prepromptfns = znewlinklist();
hsubl = hsubr = NULL;
lastpid = 0;
bshin = SHIN ? fdopen(SHIN, "r") : stdin;
if (isset(SHINSTDIN) && !SHIN && unset(INTERACTIVE)) {
#ifdef _IONBF
setvbuf(stdin, NULL, _IONBF, 0);
#else
setlinebuf(stdin);
#endif
}
times(&shtms);
}
/* Initialize signal handling */
/**/
void
init_signals(void)
{
sigchld_mask = signal_mask(SIGCHLD);
intr();
#ifndef QDEBUG
signal_ignore(SIGQUIT);
#endif
install_handler(SIGHUP);
install_handler(SIGCHLD);
#ifdef SIGWINCH
install_handler(SIGWINCH);
#endif
if (interact) {
install_handler(SIGALRM);
signal_ignore(SIGTERM);
}
if (jobbing) {
long ttypgrp;
while ((ttypgrp = gettygrp()) != -1 && ttypgrp != mypgrp)
kill(0, SIGTTIN);
if (ttypgrp == -1) {
opts[MONITOR] = 0;
} else {
signal_ignore(SIGTTOU);
signal_ignore(SIGTSTP);
signal_ignore(SIGTTIN);
attachtty(mypgrp);
}
}
if (islogin) {
signal_setmask(signal_mask(0));
} else if (interact) {
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGINT);
sigaddset(&set, SIGQUIT);
signal_unblock(set);
}
}
/* Source the init scripts. If called as "ksh" or "sh" *
* then we source the standard sh/ksh scripts instead of *
* the standard zsh scripts */
/**/
void
run_init_scripts(void)
{
noerrexit = -1;
if (emulation == EMULATE_KSH || emulation == EMULATE_SH) {
if (islogin)
source("/etc/profile");
if (unset(PRIVILEGED)) {
char *s = getsparam("ENV");
if (islogin)
sourcehome(".profile");
noerrs = 2;
if (s && !parsestr(s)) {
singsub(&s);
noerrs = 0;
source(s);
}
noerrs = 0;
} else
source("/etc/suid_profile");
} else {
#ifdef GLOBAL_ZSHENV
source(GLOBAL_ZSHENV);
#endif
if (isset(RCS) && unset(PRIVILEGED))
sourcehome(".zshenv");
if (islogin) {
#ifdef GLOBAL_ZPROFILE
if (isset(RCS) && isset(GLOBALRCS))
source(GLOBAL_ZPROFILE);
#endif
if (isset(RCS) && unset(PRIVILEGED))
sourcehome(".zprofile");
}
if (interact) {
#ifdef GLOBAL_ZSHRC
if (isset(RCS) && isset(GLOBALRCS))
source(GLOBAL_ZSHRC);
#endif
if (isset(RCS) && unset(PRIVILEGED))
sourcehome(".zshrc");
}
if (islogin) {
#ifdef GLOBAL_ZLOGIN
if (isset(RCS) && isset(GLOBALRCS))
source(GLOBAL_ZLOGIN);
#endif
if (isset(RCS) && unset(PRIVILEGED))
sourcehome(".zlogin");
}
}
noerrexit = 0;
nohistsave = 0;
}
/* Miscellaneous initializations that happen after init scripts are run */
/**/
void
init_misc(void)
{
#ifndef RESTRICTED_R
if ( restricted )
#else
if (*zsh_name == 'r' || restricted)
#endif
dosetopt(RESTRICTED, 1, 0);
if (cmd) {
if (SHIN >= 10)
fclose(bshin);
SHIN = movefd(open("/dev/null", O_RDONLY | O_NOCTTY));
bshin = fdopen(SHIN, "r");
execstring(cmd, 0, 1);
stopmsg = 1;
zexit(lastval, 0);
}
if (interact && isset(RCS))
readhistfile(NULL, 0, HFILE_USE_OPTIONS);
}
/* source a file */
/**/
int
source(char *s)
{
Eprog prog;
int tempfd = -1, fd, cj, oldlineno;
int oldshst, osubsh, oloops;
FILE *obshin;
char *old_scriptname = scriptname, *us;
unsigned char *ocs;
int ocsp;
if (!s ||
(!(prog = try_source_file((us = unmeta(s)))) &&
(tempfd = movefd(open(us, O_RDONLY | O_NOCTTY))) == -1)) {
return 1;
}
/* save the current shell state */
fd = SHIN; /* store the shell input fd */
obshin = bshin; /* store file handle for buffered shell input */
osubsh = subsh; /* store whether we are in a subshell */
cj = thisjob; /* store our current job number */
oldlineno = lineno; /* store our current lineno */
oloops = loops; /* stored the # of nested loops we are in */
oldshst = opts[SHINSTDIN]; /* store current value of this option */
ocs = cmdstack;
ocsp = cmdsp;
cmdstack = (unsigned char *) zalloc(CMDSTACKSZ);
cmdsp = 0;
if (!prog) {
SHIN = tempfd;
bshin = fdopen(SHIN, "r");
}
subsh = 0;
lineno = 1;
loops = 0;
dosetopt(SHINSTDIN, 0, 1);
scriptname = s;
sourcelevel++;
if (prog) {
pushheap();
errflag = 0;
execode(prog, 1, 0);
popheap();
} else
loop(0, 0); /* loop through the file to be sourced */
sourcelevel--;
/* restore the current shell state */
if (prog)
freeeprog(prog);
else {
fclose(bshin);
fdtable[SHIN] = 0;
SHIN = fd; /* the shell input fd */
bshin = obshin; /* file handle for buffered shell input */
}
subsh = osubsh; /* whether we are in a subshell */
thisjob = cj; /* current job number */
lineno = oldlineno; /* our current lineno */
loops = oloops; /* the # of nested loops we are in */
dosetopt(SHINSTDIN, oldshst, 1); /* SHINSTDIN option */
errflag = 0;
retflag = 0;
scriptname = old_scriptname;
free(cmdstack);
cmdstack = ocs;
cmdsp = ocsp;
return 0;
}
/* Try to source a file in the home directory */
/**/
void
sourcehome(char *s)
{
char *h;
queue_signals();
if (emulation == EMULATE_SH || emulation == EMULATE_KSH ||
!(h = getsparam("ZDOTDIR")))
h = home;
{
/* Let source() complain if path is too long */
VARARR(char, buf, strlen(h) + strlen(s) + 2);
sprintf(buf, "%s/%s", h, s);
unqueue_signals();
source(buf);
}
}
/**/
void
init_bltinmods(void)
{
#include "bltinmods.list"
load_module("zsh/main");
}
/**/
mod_export void
noop_function(void)
{
/* do nothing */
}
/**/
mod_export void
noop_function_int(int nothing)
{
/* do nothing */
}
/* ZLE entry point pointers. They are defined here because the initial *
* values depend on whether ZLE is linked in or not -- if it is, we *
* avoid wasting space with the fallback functions. No other source *
* file needs to know which modules are linked in. */
#ifdef LINKED_XMOD_zshQszle
/**/
mod_export ZleVoidFn trashzleptr = noop_function;
/**/
mod_export ZleVoidFn refreshptr = noop_function;
/**/
mod_export ZleVoidIntFn spaceinlineptr = noop_function_int;
/**/
mod_export ZleReadFn zlereadptr = autoload_zleread;
#else /* !LINKED_XMOD_zshQszle */
mod_export ZleVoidFn trashzleptr = noop_function;
mod_export ZleVoidFn refreshptr = noop_function;
mod_export ZleVoidIntFn spaceinlineptr = noop_function_int;
# ifdef UNLINKED_XMOD_zshQszle
mod_export ZleReadFn zlereadptr = autoload_zleread;
# else /* !UNLINKED_XMOD_zshQszle */
mod_export ZleReadFn zlereadptr = fallback_zleread;
# endif /* !UNLINKED_XMOD_zshQszle */
#endif /* !LINKED_XMOD_zshQszle */
/**/
unsigned char *
autoload_zleread(char *lp, char *rp, int ha)
{
zlereadptr = fallback_zleread;
if (load_module("zsh/zle"))
load_module("zsh/compctl");
return zleread(lp, rp, ha);
}
/**/
mod_export unsigned char *
fallback_zleread(char *lp, char *rp, int ha)
{
char *pptbuf;
int pptlen;
pptbuf = unmetafy(promptexpand(lp, 0, NULL, NULL), &pptlen);
write(2, (WRITE_ARG_2_T)pptbuf, pptlen);
free(pptbuf);
return (unsigned char *)shingetline();
}
/* compctl entry point pointers. Similar to the ZLE ones. */
/**/
mod_export CompctlReadFn compctlreadptr = fallback_compctlread;
/**/
mod_export int
fallback_compctlread(char *name, char **args, char *ops, char *reply)
{
zwarnnam(name, "option valid only in functions called from completion",
NULL, 0);
return 1;
}
/*
* This is real main entry point. This has to be mod_export'ed
* so zsh.exe can found it on Cygwin
*/
/**/
mod_export int
zsh_main(int argc, char **argv)
{
char **t;
int t0;
#ifdef USE_LOCALE
setlocale(LC_ALL, "");
#endif
init_hackzero(argv, environ);
/*
* Provisionally set up the type table to allow metafication.
* This will be done properly when we have decided if we are
* interactive
*/
typtab['\0'] |= IMETA;
typtab[STOUC(Meta) ] |= IMETA;
typtab[STOUC(Marker)] |= IMETA;
for (t0 = (int)STOUC(Pound); t0 <= (int)STOUC(Nularg); t0++)
typtab[t0] |= ITOK | IMETA;
for (t = argv; *t; *t = metafy(*t, -1, META_ALLOC), t++);
zsh_name = argv[0];
do {
char *arg0 = zsh_name;
if (!(zsh_name = strrchr(arg0, '/')))
zsh_name = arg0;
else
zsh_name++;
if (*zsh_name == '-')
zsh_name++;
if (strcmp(zsh_name, "su") == 0) {
char *sh = zgetenv("SHELL");
if (sh && *sh && arg0 != sh)
zsh_name = sh;
else
break;
} else
break;
} while (zsh_name);
fdtable_size = zopenmax();
fdtable = zcalloc(fdtable_size);
createoptiontable();
emulate(zsh_name, 1); /* initialises most options */
opts[LOGINSHELL] = (**argv == '-');
opts[MONITOR] = 1; /* may be unset in init_io() */
opts[PRIVILEGED] = (getuid() != geteuid() || getgid() != getegid());
opts[USEZLE] = 1; /* may be unset in init_io() */
parseargs(argv); /* sets INTERACTIVE, SHINSTDIN and SINGLECOMMAND */
SHTTY = -1;
init_io();
setupvals();
init_signals();
init_bltinmods();
run_init_scripts();
init_misc();
for (;;) {
do
loop(1,0);
while (tok != ENDINPUT && (tok != LEXERR || isset(SHINSTDIN)));
if (tok == LEXERR) {
stopmsg = 1;
zexit(lastval, 0);
}
if (!(isset(IGNOREEOF) && interact)) {
#if 0
if (interact)
fputs(islogin ? "logout\n" : "exit\n", shout);
#endif
zexit(lastval, 0);
continue;
}
noexitct++;
if (noexitct >= 10) {
stopmsg = 1;
zexit(lastval, 0);
}
zerrnam("zsh", (!islogin) ? "use 'exit' to exit."
: "use 'logout' to logout.", NULL, 0);
}
}
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