예제 #1
0
파일: io.c 프로젝트: radixo/openbsd-src
void
kshdebug_init_(void)
{
	if (kshdebug_shf)
		shf_close(kshdebug_shf);
	kshdebug_shf = shf_open("/tmp/ksh-debug.log",
	    O_WRONLY|O_APPEND|O_CREAT, 0600, SHF_WR|SHF_MAPHI);
	if (kshdebug_shf) {
		shf_fprintf(kshdebug_shf, "\nNew shell[pid %d]\n", getpid());
		shf_flush(kshdebug_shf);
	}
}
예제 #2
0
파일: main.c 프로젝트: MIPS/external-mksh
int
include(const char *name, int argc, const char **argv, bool intr_ok)
{
	Source *volatile s = NULL;
	struct shf *shf;
	const char **volatile old_argv;
	volatile int old_argc;
	int i;

	shf = shf_open(name, O_RDONLY, 0, SHF_MAPHI | SHF_CLEXEC);
	if (shf == NULL)
		return (-1);

	if (argv) {
		old_argv = e->loc->argv;
		old_argc = e->loc->argc;
	} else {
		old_argv = NULL;
		old_argc = 0;
	}
	newenv(E_INCL);
	if ((i = kshsetjmp(e->jbuf))) {
		quitenv(s ? s->u.shf : NULL);
		if (old_argv) {
			e->loc->argv = old_argv;
			e->loc->argc = old_argc;
		}
		switch (i) {
		case LRETURN:
		case LERROR:
			/* see below */
			return (exstat & 0xFF);
		case LINTR:
			/*
			 * intr_ok is set if we are including .profile or $ENV.
			 * If user ^Cs out, we don't want to kill the shell...
			 */
			if (intr_ok && ((exstat & 0xFF) - 128) != SIGTERM)
				return (1);
			/* FALLTHROUGH */
		case LEXIT:
		case LLEAVE:
		case LSHELL:
			unwind(i);
			/* NOTREACHED */
		default:
			internal_errorf(Tunexpected_type, Tunwind, Tsource, i);
			/* NOTREACHED */
		}
	}
	if (argv) {
		e->loc->argv = argv;
		e->loc->argc = argc;
	}
	s = pushs(SFILE, ATEMP);
	s->u.shf = shf;
	strdupx(s->file, name, ATEMP);
	i = shell(s, 1);
	quitenv(s->u.shf);
	if (old_argv) {
		e->loc->argv = old_argv;
		e->loc->argc = old_argc;
	}
	/* & 0xff to ensure value not -1 */
	return (i & 0xFF);
}
예제 #3
0
파일: main.c 프로젝트: MIPS/external-mksh
static int
main_init(int argc, const char *argv[], Source **sp, struct block **lp)
{
	int argi, i;
	Source *s = NULL;
	struct block *l;
	unsigned char restricted_shell, errexit, utf_flag;
	char *cp;
	const char *ccp, **wp;
	struct tbl *vp;
	struct stat s_stdin;
#if !defined(_PATH_DEFPATH) && defined(_CS_PATH)
	ssize_t k;
#endif

#if defined(MKSH_EBCDIC) || defined(MKSH_FAUX_EBCDIC)
	ebcdic_init();
#endif
	set_ifs(TC_IFSWS);

#ifdef __OS2__
	os2_init(&argc, &argv);
#endif

	/* do things like getpgrp() et al. */
	chvt_reinit();

	/* make sure argv[] is sane, for weird OSes */
	if (!*argv) {
		argv = empty_argv;
		argc = 1;
	}
	kshname = argv[0];

	/* initialise permanent Area */
	ainit(&aperm);
	/* max. name length: -2147483648 = 11 (+ NUL) */
	vtemp = alloc(offsetof(struct tbl, name[0]) + 12, APERM);

	/* set up base environment */
	env.type = E_NONE;
	ainit(&env.area);
	/* set up global l->vars and l->funs */
	newblock();

	/* Do this first so output routines (eg, errorf, shellf) can work */
	initio();

	/* determine the basename (without '-' or path) of the executable */
	ccp = kshname;
	goto begin_parsing_kshname;
	while ((i = ccp[argi++])) {
		if (mksh_cdirsep(i)) {
			ccp += argi;
 begin_parsing_kshname:
			argi = 0;
			if (*ccp == '-')
				++ccp;
		}
	}
	if (!*ccp)
		ccp = empty_argv[0];

	/*
	 * Turn on nohup by default. (AT&T ksh does not have a nohup
	 * option - it always sends the hup).
	 */
	Flag(FNOHUP) = 1;

	/*
	 * Turn on brace expansion by default. AT&T kshs that have
	 * alternation always have it on.
	 */
	Flag(FBRACEEXPAND) = 1;

	/*
	 * Turn on "set -x" inheritance by default.
	 */
	Flag(FXTRACEREC) = 1;

	/* define built-in commands and see if we were called as one */
	ktinit(APERM, &builtins,
	    /* currently up to 54 builtins: 75% of 128 = 2^7 */
	    7);
	for (i = 0; mkshbuiltins[i].name != NULL; i++)
		if (!strcmp(ccp, builtin(mkshbuiltins[i].name,
		    mkshbuiltins[i].func)))
			Flag(FAS_BUILTIN) = 1;

	if (!Flag(FAS_BUILTIN)) {
		/* check for -T option early */
		argi = parse_args(argv, OF_FIRSTTIME, NULL);
		if (argi < 0)
			return (1);

#if defined(MKSH_BINSHPOSIX) || defined(MKSH_BINSHREDUCED)
		/* are we called as -sh or /bin/sh or so? */
		if (!strcmp(ccp, "sh" MKSH_EXE_EXT)) {
			/* either also turns off braceexpand */
#ifdef MKSH_BINSHPOSIX
			/* enable better POSIX conformance */
			change_flag(FPOSIX, OF_FIRSTTIME, true);
#endif
#ifdef MKSH_BINSHREDUCED
			/* enable kludge/compat mode */
			change_flag(FSH, OF_FIRSTTIME, true);
#endif
		}
#endif
	}

	initvar();

	inittraps();

	coproc_init();

	/* set up variable and command dictionaries */
	ktinit(APERM, &taliases, 0);
	ktinit(APERM, &aliases, 0);
#ifndef MKSH_NOPWNAM
	ktinit(APERM, &homedirs, 0);
#endif

	/* define shell keywords */
	initkeywords();

	init_histvec();

	/* initialise tty size before importing environment */
	change_winsz();

#ifdef _PATH_DEFPATH
	def_path = _PATH_DEFPATH;
#else
#ifdef _CS_PATH
	if ((k = confstr(_CS_PATH, NULL, 0)) > 0 &&
	    confstr(_CS_PATH, cp = alloc(k + 1, APERM), k + 1) == k + 1)
		def_path = cp;
	else
#endif
		/*
		 * this is uniform across all OSes unless it
		 * breaks somewhere hard; don't try to optimise,
		 * e.g. add stuff for Interix or remove /usr
		 * for HURD, because e.g. Debian GNU/HURD is
		 * "keeping a regular /usr"; this is supposed
		 * to be a sane 'basic' default PATH
		 */
		def_path = MKSH_UNIXROOT "/bin" MKSH_PATHSEPS
		    MKSH_UNIXROOT "/usr/bin" MKSH_PATHSEPS
		    MKSH_UNIXROOT "/sbin" MKSH_PATHSEPS
		    MKSH_UNIXROOT "/usr/sbin";
#endif

	/*
	 * Set PATH to def_path (will set the path global variable).
	 * (import of environment below will probably change this setting).
	 */
	vp = global(TPATH);
	/* setstr can't fail here */
	setstr(vp, def_path, KSH_RETURN_ERROR);

#ifndef MKSH_NO_CMDLINE_EDITING
	/*
	 * Set edit mode to emacs by default, may be overridden
	 * by the environment or the user. Also, we want tab completion
	 * on in vi by default.
	 */
	change_flag(FEMACS, OF_SPECIAL, true);
#if !MKSH_S_NOVI
	Flag(FVITABCOMPLETE) = 1;
#endif
#endif

	/* import environment */
	init_environ();

	/* override default PATH regardless of environment */
#ifdef MKSH_DEFPATH_OVERRIDE
	vp = global(TPATH);
	setstr(vp, MKSH_DEFPATH_OVERRIDE, KSH_RETURN_ERROR);
#endif

	/* for security */
	typeset(TinitIFS, 0, 0, 0, 0);

	/* assign default shell variable values */
	typeset("PATHSEP=" MKSH_PATHSEPS, 0, 0, 0, 0);
	substitute(initsubs, 0);

	/* Figure out the current working directory and set $PWD */
	vp = global(TPWD);
	cp = str_val(vp);
	/* Try to use existing $PWD if it is valid */
	set_current_wd((mksh_abspath(cp) && test_eval(NULL, TO_FILEQ, cp,
	    Tdot, true)) ? cp : NULL);
	if (current_wd[0])
		simplify_path(current_wd);
	/* Only set pwd if we know where we are or if it had a bogus value */
	if (current_wd[0] || *cp)
		/* setstr can't fail here */
		setstr(vp, current_wd, KSH_RETURN_ERROR);

	for (wp = initcoms; *wp != NULL; wp++) {
		c_builtin(wp);
		while (*wp != NULL)
			wp++;
	}
	setint_n(global("OPTIND"), 1, 10);

	kshuid = getuid();
	kshgid = getgid();
	kshegid = getegid();

	safe_prompt = ksheuid ? "$ " : "# ";
	vp = global("PS1");
	/* Set PS1 if unset or we are root and prompt doesn't contain a # */
	if (!(vp->flag & ISSET) ||
	    (!ksheuid && !strchr(str_val(vp), '#')))
		/* setstr can't fail here */
		setstr(vp, safe_prompt, KSH_RETURN_ERROR);
	setint_n((vp = global("BASHPID")), 0, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("PGRP")), (mksh_uari_t)kshpgrp, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("PPID")), (mksh_uari_t)kshppid, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("USER_ID")), (mksh_uari_t)ksheuid, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("KSHUID")), (mksh_uari_t)kshuid, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("KSHEGID")), (mksh_uari_t)kshegid, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("KSHGID")), (mksh_uari_t)kshgid, 10);
	vp->flag |= INT_U;
	setint_n((vp = global("RANDOM")), rndsetup(), 10);
	vp->flag |= INT_U;
	setint_n((vp_pipest = global("PIPESTATUS")), 0, 10);

	/* Set this before parsing arguments */
	Flag(FPRIVILEGED) = (kshuid != ksheuid || kshgid != kshegid) ? 2 : 0;

	/* this to note if monitor is set on command line (see below) */
#ifndef MKSH_UNEMPLOYED
	Flag(FMONITOR) = 127;
#endif
	/* this to note if utf-8 mode is set on command line (see below) */
	UTFMODE = 2;

	if (!Flag(FAS_BUILTIN)) {
		argi = parse_args(argv, OF_CMDLINE, NULL);
		if (argi < 0)
			return (1);
	}

	/* process this later only, default to off (hysterical raisins) */
	utf_flag = UTFMODE;
	UTFMODE = 0;

	if (Flag(FAS_BUILTIN)) {
		/* auto-detect from environment variables, always */
		utf_flag = 3;
	} else if (Flag(FCOMMAND)) {
		s = pushs(SSTRINGCMDLINE, ATEMP);
		if (!(s->start = s->str = argv[argi++]))
			errorf(Tf_optfoo, "", "", 'c', Treq_arg);
		while (*s->str) {
			if (ctype(*s->str, C_QUOTE))
				break;
			s->str++;
		}
		if (!*s->str)
			s->flags |= SF_MAYEXEC;
		s->str = s->start;
#ifdef MKSH_MIDNIGHTBSD01ASH_COMPAT
		/* compatibility to MidnightBSD 0.1 /bin/sh (kludge) */
		if (Flag(FSH) && argv[argi] && !strcmp(argv[argi], "--"))
			++argi;
#endif
		if (argv[argi])
			kshname = argv[argi++];
	} else if (argi < argc && !Flag(FSTDIN)) {
		s = pushs(SFILE, ATEMP);
#ifdef __OS2__
		/*
		 * A bug in OS/2 extproc (like shebang) handling makes
		 * it not pass the full pathname of a script, so we need
		 * to search for it. This changes the behaviour of a
		 * simple "mksh foo", but can't be helped.
		 */
		s->file = argv[argi++];
		if (search_access(s->file, X_OK) != 0)
			s->file = search_path(s->file, path, X_OK, NULL);
		if (!s->file || !*s->file)
			s->file = argv[argi - 1];
#else
		s->file = argv[argi++];
#endif
		s->u.shf = shf_open(s->file, O_RDONLY, 0,
		    SHF_MAPHI | SHF_CLEXEC);
		if (s->u.shf == NULL) {
			shl_stdout_ok = false;
			warningf(true, Tf_sD_s, s->file, cstrerror(errno));
			/* mandated by SUSv4 */
			exstat = 127;
			unwind(LERROR);
		}
		kshname = s->file;
	} else {
		Flag(FSTDIN) = 1;
		s = pushs(SSTDIN, ATEMP);
		s->file = "<stdin>";
		s->u.shf = shf_fdopen(0, SHF_RD | can_seek(0),
		    NULL);
		if (isatty(0) && isatty(2)) {
			Flag(FTALKING) = Flag(FTALKING_I) = 1;
			/* The following only if isatty(0) */
			s->flags |= SF_TTY;
			s->u.shf->flags |= SHF_INTERRUPT;
			s->file = NULL;
		}
	}

	/* this bizarreness is mandated by POSIX */
	if (fstat(0, &s_stdin) >= 0 && S_ISCHR(s_stdin.st_mode) &&
	    Flag(FTALKING))
		reset_nonblock(0);

	/* initialise job control */
	j_init();
	/* do this after j_init() which calls tty_init_state() */
	if (Flag(FTALKING)) {
		if (utf_flag == 2) {
#ifndef MKSH_ASSUME_UTF8
			/* auto-detect from locale or environment */
			utf_flag = 4;
#else /* this may not be an #elif */
#if MKSH_ASSUME_UTF8
			utf_flag = 1;
#else
			/* always disable UTF-8 (for interactive) */
			utf_flag = 0;
#endif
#endif
		}
#ifndef MKSH_NO_CMDLINE_EDITING
		x_init();
#endif
	}

#ifdef SIGWINCH
	sigtraps[SIGWINCH].flags |= TF_SHELL_USES;
	setsig(&sigtraps[SIGWINCH], x_sigwinch,
	    SS_RESTORE_ORIG|SS_FORCE|SS_SHTRAP);
#endif

	l = e->loc;
	if (Flag(FAS_BUILTIN)) {
		l->argc = argc;
		l->argv = argv;
		l->argv[0] = ccp;
	} else {
		l->argc = argc - argi;
		/*
		 * allocate a new array because otherwise, when we modify
		 * it in-place, ps(1) output changes; the meaning of argc
		 * here is slightly different as it excludes kshname, and
		 * we add a trailing NULL sentinel as well
		 */
		l->argv = alloc2(l->argc + 2, sizeof(void *), APERM);
		l->argv[0] = kshname;
		memcpy(&l->argv[1], &argv[argi], l->argc * sizeof(void *));
		l->argv[l->argc + 1] = NULL;
		getopts_reset(1);
	}

	/* divine the initial state of the utf8-mode Flag */
	ccp = null;
	switch (utf_flag) {

	/* auto-detect from locale or environment */
	case 4:
#if HAVE_SETLOCALE_CTYPE
		ccp = setlocale(LC_CTYPE, "");
#if HAVE_LANGINFO_CODESET
		if (!isuc(ccp))
			ccp = nl_langinfo(CODESET);
#endif
		if (!isuc(ccp))
			ccp = null;
#endif
		/* FALLTHROUGH */

	/* auto-detect from environment */
	case 3:
		/* these were imported from environ earlier */
		if (ccp == null)
			ccp = str_val(global("LC_ALL"));
		if (ccp == null)
			ccp = str_val(global("LC_CTYPE"));
		if (ccp == null)
			ccp = str_val(global("LANG"));
		UTFMODE = isuc(ccp);
		break;

	/* not set on command line, not FTALKING */
	case 2:
	/* unknown values */
	default:
		utf_flag = 0;
		/* FALLTHROUGH */

	/* known values */
	case 1:
	case 0:
		UTFMODE = utf_flag;
		break;
	}

	/* Disable during .profile/ENV reading */
	restricted_shell = Flag(FRESTRICTED);
	Flag(FRESTRICTED) = 0;
	errexit = Flag(FERREXIT);
	Flag(FERREXIT) = 0;

	/*
	 * Do this before profile/$ENV so that if it causes problems in them,
	 * user will know why things broke.
	 */
	if (!current_wd[0] && Flag(FTALKING))
		warningf(false, "can't determine current directory");

	if (Flag(FLOGIN))
		include(MKSH_SYSTEM_PROFILE, 0, NULL, true);
	if (!Flag(FPRIVILEGED)) {
		if (Flag(FLOGIN))
			include(substitute("$HOME/.profile", 0), 0, NULL, true);
		if (Flag(FTALKING)) {
			cp = substitute("${ENV:-" MKSHRC_PATH "}", DOTILDE);
			if (cp[0] != '\0')
				include(cp, 0, NULL, true);
		}
	} else {
		include(MKSH_SUID_PROFILE, 0, NULL, true);
		/* turn off -p if not set explicitly */
		if (Flag(FPRIVILEGED) != 1)
			change_flag(FPRIVILEGED, OF_INTERNAL, false);
	}

	if (restricted_shell) {
		c_builtin(restr_com);
		/* After typeset command... */
		Flag(FRESTRICTED) = 1;
	}
	Flag(FERREXIT) = errexit;

	if (Flag(FTALKING) && s)
		hist_init(s);
	else
		/* set after ENV */
		Flag(FTRACKALL) = 1;

	alarm_init();

	*sp = s;
	*lp = l;
	return (0);
}