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lex.c revision 1.33
      1  1.33  christos /*	$NetBSD: lex.c,v 1.33 2007/01/03 00:39:16 christos Exp $	*/
      2   1.7  christos 
      3   1.1       cgd /*
      4   1.4   deraadt  * Copyright (c) 1980, 1993
      5   1.4   deraadt  *	The Regents of the University of California.  All rights reserved.
      6   1.1       cgd  *
      7   1.1       cgd  * Redistribution and use in source and binary forms, with or without
      8   1.1       cgd  * modification, are permitted provided that the following conditions
      9   1.1       cgd  * are met:
     10   1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     11   1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     12   1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     14   1.1       cgd  *    documentation and/or other materials provided with the distribution.
     15  1.23       agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1       cgd  *    may be used to endorse or promote products derived from this software
     17   1.1       cgd  *    without specific prior written permission.
     18   1.1       cgd  *
     19   1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1       cgd  * SUCH DAMAGE.
     30   1.1       cgd  */
     31   1.1       cgd 
     32  1.11     lukem #include <sys/cdefs.h>
     33   1.1       cgd #ifndef lint
     34   1.7  christos #if 0
     35   1.8       tls static char sccsid[] = "@(#)lex.c	8.2 (Berkeley) 4/20/95";
     36   1.7  christos #else
     37  1.33  christos __RCSID("$NetBSD: lex.c,v 1.33 2007/01/03 00:39:16 christos Exp $");
     38   1.7  christos #endif
     39   1.1       cgd #endif /* not lint */
     40   1.1       cgd 
     41  1.30  christos #include <assert.h>
     42  1.30  christos 
     43   1.1       cgd #include "rcv.h"
     44  1.28  christos #include <util.h>
     45   1.4   deraadt #include "extern.h"
     46  1.28  christos #ifdef USE_EDITLINE
     47  1.26  christos #include "complete.h"
     48  1.26  christos #endif
     49  1.30  christos #include "format.h"
     50  1.30  christos #include "thread.h"
     51  1.26  christos 
     52   1.1       cgd /*
     53   1.1       cgd  * Mail -- a mail program
     54   1.1       cgd  *
     55   1.1       cgd  * Lexical processing of commands.
     56   1.1       cgd  */
     57   1.1       cgd 
     58  1.30  christos static const char *prompt = DEFAULT_PROMPT;
     59  1.30  christos static int	*msgvec;
     60  1.30  christos static int	reset_on_stop;		/* do a reset() if stopped */
     61  1.30  christos 
     62  1.30  christos 
     63  1.30  christos /*
     64  1.30  christos  * Set the size of the message vector used to construct argument
     65  1.30  christos  * lists to message list functions.
     66  1.30  christos  */
     67  1.30  christos static void
     68  1.30  christos setmsize(int sz)
     69  1.30  christos {
     70  1.30  christos 	if (msgvec != 0)
     71  1.30  christos 		free(msgvec);
     72  1.30  christos 	msgvec = ecalloc((size_t) (sz + 1), sizeof *msgvec);
     73  1.30  christos }
     74   1.1       cgd 
     75   1.1       cgd /*
     76   1.1       cgd  * Set up editing on the given file name.
     77   1.1       cgd  * If the first character of name is %, we are considered to be
     78   1.1       cgd  * editing the file, otherwise we are reading our mail which has
     79   1.1       cgd  * signficance for mbox and so forth.
     80   1.1       cgd  */
     81  1.30  christos PUBLIC int
     82  1.24  christos setfile(const char *name)
     83   1.1       cgd {
     84   1.1       cgd 	FILE *ibuf;
     85  1.20       wiz 	int i, fd;
     86   1.1       cgd 	struct stat stb;
     87  1.30  christos 	char isedit = *name != '%' || getuserid(myname) != (int)getuid();
     88  1.24  christos 	const char *who = name[1] ? name + 1 : myname;
     89   1.1       cgd 	static int shudclob;
     90  1.20       wiz 	char tempname[PATHSIZE];
     91   1.1       cgd 
     92  1.18       wiz 	if ((name = expand(name)) == NULL)
     93   1.1       cgd 		return -1;
     94   1.1       cgd 
     95   1.1       cgd 	if ((ibuf = Fopen(name, "r")) == NULL) {
     96   1.1       cgd 		if (!isedit && errno == ENOENT)
     97   1.1       cgd 			goto nomail;
     98  1.22       wiz 		warn("%s", name);
     99  1.30  christos 		return -1;
    100   1.1       cgd 	}
    101   1.1       cgd 
    102   1.1       cgd 	if (fstat(fileno(ibuf), &stb) < 0) {
    103  1.22       wiz 		warn("fstat");
    104  1.25  christos 		(void)Fclose(ibuf);
    105  1.30  christos 		return -1;
    106   1.1       cgd 	}
    107   1.1       cgd 
    108   1.1       cgd 	switch (stb.st_mode & S_IFMT) {
    109   1.1       cgd 	case S_IFDIR:
    110  1.25  christos 		(void)Fclose(ibuf);
    111   1.1       cgd 		errno = EISDIR;
    112  1.22       wiz 		warn("%s", name);
    113  1.30  christos 		return -1;
    114   1.1       cgd 
    115   1.1       cgd 	case S_IFREG:
    116   1.1       cgd 		break;
    117   1.1       cgd 
    118   1.1       cgd 	default:
    119  1.25  christos 		(void)Fclose(ibuf);
    120   1.1       cgd 		errno = EINVAL;
    121  1.22       wiz 		warn("%s", name);
    122  1.30  christos 		return -1;
    123   1.1       cgd 	}
    124   1.1       cgd 
    125   1.1       cgd 	/*
    126   1.1       cgd 	 * Looks like all will be well.  We must now relinquish our
    127   1.1       cgd 	 * hold on the current set of stuff.  Must hold signals
    128   1.1       cgd 	 * while we are reading the new file, else we will ruin
    129   1.1       cgd 	 * the message[] data structure.
    130   1.1       cgd 	 */
    131   1.1       cgd 
    132   1.1       cgd 	holdsigs();
    133   1.1       cgd 	if (shudclob)
    134   1.1       cgd 		quit();
    135   1.1       cgd 
    136   1.1       cgd 	/*
    137   1.1       cgd 	 * Copy the messages into /tmp
    138   1.1       cgd 	 * and set pointers.
    139   1.1       cgd 	 */
    140   1.1       cgd 
    141   1.1       cgd 	readonly = 0;
    142  1.33  christos 	if ((i = open(name, O_WRONLY)) < 0)
    143   1.1       cgd 		readonly++;
    144   1.1       cgd 	else
    145  1.25  christos 		(void)close(i);
    146   1.1       cgd 	if (shudclob) {
    147  1.25  christos 		(void)fclose(itf);
    148  1.25  christos 		(void)fclose(otf);
    149   1.1       cgd 	}
    150   1.1       cgd 	shudclob = 1;
    151   1.1       cgd 	edit = isedit;
    152  1.25  christos 	(void)strcpy(prevfile, mailname);
    153   1.1       cgd 	if (name != mailname)
    154  1.25  christos 		(void)strcpy(mailname, name);
    155   1.1       cgd 	mailsize = fsize(ibuf);
    156  1.20       wiz 	(void)snprintf(tempname, sizeof(tempname),
    157  1.20       wiz 	    "%s/mail.RxXXXXXXXXXX", tmpdir);
    158  1.20       wiz 	if ((fd = mkstemp(tempname)) == -1 ||
    159  1.20       wiz 	    (otf = fdopen(fd, "w")) == NULL)
    160  1.20       wiz 		err(1, "%s", tempname);
    161  1.28  christos 	(void)fcntl(fileno(otf), F_SETFD, FD_CLOEXEC);
    162  1.20       wiz 	if ((itf = fopen(tempname, "r")) == NULL)
    163  1.20       wiz 		err(1, "%s", tempname);
    164  1.28  christos 	(void)fcntl(fileno(itf), F_SETFD, FD_CLOEXEC);
    165  1.25  christos 	(void)rm(tempname);
    166  1.25  christos 	setptr(ibuf, (off_t)0);
    167  1.30  christos 	setmsize(get_abs_msgCount());
    168   1.8       tls 	/*
    169   1.9     mikel 	 * New mail may have arrived while we were reading
    170   1.9     mikel 	 * the mail file, so reset mailsize to be where
    171   1.8       tls 	 * we really are in the file...
    172   1.8       tls 	 */
    173   1.8       tls 	mailsize = ftell(ibuf);
    174  1.25  christos 	(void)Fclose(ibuf);
    175   1.1       cgd 	relsesigs();
    176   1.1       cgd 	sawcom = 0;
    177  1.30  christos 	if (!edit && get_abs_msgCount() == 0) {
    178   1.1       cgd nomail:
    179  1.25  christos 		(void)fprintf(stderr, "No mail for %s\n", who);
    180   1.1       cgd 		return -1;
    181   1.1       cgd 	}
    182  1.30  christos 	return 0;
    183   1.1       cgd }
    184   1.1       cgd 
    185   1.8       tls /*
    186   1.8       tls  * Incorporate any new mail that has arrived since we first
    187   1.8       tls  * started reading mail.
    188   1.8       tls  */
    189  1.30  christos PUBLIC int
    190  1.17       wiz incfile(void)
    191   1.8       tls {
    192  1.25  christos 	off_t newsize;
    193  1.30  christos 	int omsgCount;
    194   1.8       tls 	FILE *ibuf;
    195   1.8       tls 
    196  1.30  christos 	omsgCount = get_abs_msgCount();
    197  1.30  christos 
    198   1.8       tls 	ibuf = Fopen(mailname, "r");
    199   1.8       tls 	if (ibuf == NULL)
    200   1.8       tls 		return -1;
    201   1.8       tls 	holdsigs();
    202   1.8       tls 	newsize = fsize(ibuf);
    203   1.8       tls 	if (newsize == 0)
    204   1.9     mikel 		return -1;		/* mail box is now empty??? */
    205   1.8       tls 	if (newsize < mailsize)
    206   1.8       tls 		return -1;              /* mail box has shrunk??? */
    207   1.8       tls 	if (newsize == mailsize)
    208   1.8       tls 		return 0;               /* no new mail */
    209  1.30  christos 	setptr(ibuf, mailsize);		/* read in new mail */
    210  1.30  christos 	setmsize(get_abs_msgCount());	/* get the new message count */
    211   1.8       tls 	mailsize = ftell(ibuf);
    212  1.25  christos 	(void)Fclose(ibuf);
    213   1.8       tls 	relsesigs();
    214  1.30  christos 	return get_abs_msgCount() - omsgCount;
    215   1.8       tls }
    216   1.8       tls 
    217  1.29  christos /*
    218  1.29  christos  * Return a pointer to the comment character, respecting quoting as
    219  1.29  christos  * done in getrawlist().  The comment character is ignored inside
    220  1.29  christos  * quotes.
    221  1.29  christos  */
    222  1.29  christos static char *
    223  1.29  christos comment_char(char *line)
    224  1.29  christos {
    225  1.29  christos 	char *p;
    226  1.29  christos 	char quotec;
    227  1.29  christos 	quotec = '\0';
    228  1.29  christos 	for (p = line; *p; p++) {
    229  1.29  christos 		if (quotec != '\0') {
    230  1.29  christos 			if (*p == quotec)
    231  1.29  christos 				quotec = '\0';
    232  1.29  christos 		}
    233  1.29  christos 		else if (*p == '"' || *p == '\'')
    234  1.29  christos 			quotec = *p;
    235  1.29  christos 		else if (*p == COMMENT_CHAR)
    236  1.29  christos 			return p;
    237  1.29  christos 	}
    238  1.29  christos 	return NULL;
    239  1.29  christos }
    240  1.29  christos 
    241  1.30  christos /*
    242  1.30  christos  * When we wake up after ^Z, reprint the prompt.
    243  1.30  christos  */
    244  1.30  christos static void
    245  1.30  christos stop(int s)
    246  1.30  christos {
    247  1.30  christos 	sig_t old_action = signal(s, SIG_DFL);
    248  1.30  christos 	sigset_t nset;
    249  1.30  christos 
    250  1.30  christos 	(void)sigemptyset(&nset);
    251  1.30  christos 	(void)sigaddset(&nset, s);
    252  1.30  christos 	(void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
    253  1.30  christos 	(void)kill(0, s);
    254  1.30  christos 	(void)sigprocmask(SIG_BLOCK, &nset, NULL);
    255  1.30  christos 	(void)signal(s, old_action);
    256  1.30  christos 	if (reset_on_stop) {
    257  1.30  christos 		reset_on_stop = 0;
    258  1.30  christos 		reset(0);
    259  1.30  christos 	}
    260  1.30  christos }
    261  1.30  christos 
    262  1.29  christos 
    263   1.1       cgd 
    264   1.1       cgd /*
    265  1.30  christos  * Signal handler is hooked by setup_piping().
    266  1.30  christos  * Respond to a broken pipe signal --
    267  1.30  christos  * probably caused by quitting more.
    268   1.1       cgd  */
    269  1.30  christos static jmp_buf	pipestop;
    270  1.30  christos 
    271  1.30  christos /*ARGSUSED*/
    272  1.30  christos static void
    273  1.30  christos brokpipe(int signo __unused)
    274   1.1       cgd {
    275  1.30  christos 	longjmp(pipestop, 1);
    276  1.30  christos }
    277   1.1       cgd 
    278  1.30  christos /*
    279  1.30  christos  * Check the command line for any requested piping or redirection,
    280  1.30  christos  * depending on the value of 'c'.  If "enable-pipes" is set, search
    281  1.30  christos  * the command line (cp) for the first occurrence of the character 'c'
    282  1.30  christos  * that is not in a quote or (parenthese) group.
    283  1.30  christos  */
    284  1.30  christos PUBLIC char *
    285  1.30  christos shellpr(char *cp)
    286  1.30  christos {
    287  1.30  christos 	int quotec;
    288  1.30  christos 	int level;
    289  1.30  christos 
    290  1.30  christos 	if (cp == NULL || value(ENAME_ENABLE_PIPES) == NULL)
    291  1.30  christos 		return NULL;
    292  1.30  christos 
    293  1.30  christos 	level = 0;
    294  1.30  christos 	quotec = 0;
    295  1.30  christos 	for (/*EMPTY*/; *cp != '\0'; cp++) {
    296  1.30  christos 		if (quotec) {
    297  1.30  christos 			if (*cp == quotec)
    298  1.30  christos 				quotec = 0;
    299  1.30  christos 			if (*cp == '\\' &&
    300  1.30  christos 			    (cp[1] == quotec || cp[1] == '\\'))
    301  1.30  christos 				cp++;
    302  1.30  christos 		}
    303  1.30  christos 		else {
    304  1.30  christos 			switch (*cp) {
    305  1.30  christos 			case '|':
    306  1.30  christos 			case '>':
    307  1.30  christos 				if (level == 0)
    308  1.30  christos 					return cp;
    309  1.30  christos 				break;
    310  1.30  christos 			case '(':
    311  1.30  christos 				level++;
    312   1.1       cgd 				break;
    313  1.30  christos 			case ')':
    314  1.30  christos 				level--;
    315   1.1       cgd 				break;
    316  1.30  christos 			case '"':
    317  1.30  christos 			case '\'':
    318  1.30  christos 				quotec = *cp;
    319   1.1       cgd 				break;
    320  1.30  christos 			default:
    321   1.1       cgd 				break;
    322   1.1       cgd 			}
    323  1.30  christos 		}
    324  1.30  christos 	}
    325  1.30  christos 	return NULL;
    326  1.30  christos }
    327  1.30  christos 
    328  1.30  christos /*
    329  1.30  christos  * Setup any pipe or redirection that the command line indicates.
    330  1.30  christos  * If none, then setup the pager unless "pager-off" is defined.
    331  1.30  christos  */
    332  1.30  christos static FILE *fp_stop = NULL;
    333  1.30  christos static int oldfd1 = -1;
    334  1.30  christos static int
    335  1.30  christos setup_piping(char *cmdline, int c_pipe)
    336  1.30  christos {
    337  1.30  christos 	FILE *fout;
    338  1.30  christos 	FILE *last_file;
    339  1.30  christos 	char *cp;
    340  1.30  christos 
    341  1.30  christos 	last_file = last_registered_file(0);
    342  1.30  christos 
    343  1.30  christos 	fout = NULL;
    344  1.30  christos 	if ((cp = shellpr(cmdline)) != NULL) {
    345  1.30  christos 		char c;
    346  1.30  christos 		c = *cp;
    347  1.30  christos 		*cp = '\0';
    348  1.30  christos 		cp++;
    349  1.30  christos 
    350  1.30  christos 		if (c == '|') {
    351  1.30  christos 			if ((fout = Popen(cp, "w")) == NULL) {
    352  1.30  christos 				warn("Popen: %s", cp);
    353  1.30  christos 				return -1;
    354  1.26  christos 			}
    355  1.30  christos 		}
    356  1.30  christos 		else {
    357  1.30  christos 			const char *mode;
    358  1.30  christos 			assert(c == '>');
    359  1.30  christos 			mode = *cp == '>' ? "a" : "w";
    360  1.30  christos 			if (*cp == '>')
    361  1.30  christos 				cp++;
    362  1.30  christos 
    363  1.30  christos 			cp = skip_blank(cp);
    364  1.30  christos 			if ((fout = Fopen(cp, mode)) == NULL) {
    365  1.30  christos 				warn("Fopen: %s", cp);
    366  1.30  christos 				return -1;
    367   1.1       cgd 			}
    368   1.1       cgd 		}
    369  1.30  christos 
    370  1.30  christos 	}
    371  1.31  christos 	else if (value(ENAME_PAGER_OFF) == NULL && (c_pipe & C_PIPE_PAGER ||
    372  1.31  christos 		(c_pipe & C_PIPE_CRT && value(ENAME_CRT) != NULL))) {
    373  1.30  christos 		const char *pager;
    374  1.30  christos 		pager = value(ENAME_PAGER);
    375  1.30  christos 		if (pager == NULL || *pager == '\0')
    376  1.30  christos 			pager = _PATH_MORE;
    377  1.30  christos 
    378  1.30  christos 		if ((fout = Popen(pager, "w")) == NULL) {
    379  1.30  christos 			warn("Popen: %s", pager);
    380  1.30  christos 			return -1;
    381  1.30  christos 		}
    382  1.30  christos 	}
    383  1.30  christos 
    384  1.30  christos 	if (fout) {
    385  1.30  christos 		(void)signal(SIGPIPE, brokpipe);
    386  1.30  christos 		(void)fflush(stdout);
    387  1.33  christos 		if ((oldfd1 = dup(STDOUT_FILENO)) == -1)
    388  1.30  christos 			err(EXIT_FAILURE, "dup failed");
    389  1.33  christos 		if (dup2(fileno(fout), STDOUT_FILENO) == -1)
    390  1.30  christos 			err(EXIT_FAILURE, "dup2 failed");
    391  1.30  christos 		fp_stop = last_file;
    392  1.30  christos 	}
    393  1.30  christos 	return 0;
    394  1.30  christos }
    395  1.30  christos 
    396  1.30  christos /*
    397  1.30  christos  * This will close any piping started by setup_piping().
    398  1.30  christos  */
    399  1.30  christos static void
    400  1.30  christos close_piping(void)
    401  1.30  christos {
    402  1.30  christos 	if (oldfd1 != -1) {
    403  1.30  christos 		(void)fflush(stdout);
    404  1.33  christos 		if (fileno(stdout) != oldfd1 &&
    405  1.33  christos 		    dup2(oldfd1, STDOUT_FILENO) == -1)
    406  1.30  christos 			err(EXIT_FAILURE, "dup2 failed");
    407  1.30  christos 
    408  1.30  christos 		(void)signal(SIGPIPE, SIG_IGN);
    409  1.30  christos 		close_top_files(fp_stop);
    410  1.30  christos 		fp_stop = NULL;
    411  1.30  christos 		(void)close(oldfd1);
    412  1.30  christos 		oldfd1 = -1;
    413  1.30  christos 		(void)signal(SIGPIPE, SIG_DFL);
    414   1.1       cgd 	}
    415   1.1       cgd }
    416   1.1       cgd 
    417   1.1       cgd /*
    418  1.30  christos  * Determine if as1 is a valid prefix of as2.
    419  1.30  christos  * Return true if yep.
    420  1.30  christos  */
    421  1.30  christos static int
    422  1.30  christos isprefix(char *as1, const char *as2)
    423  1.30  christos {
    424  1.30  christos 	char *s1;
    425  1.30  christos 	const char *s2;
    426  1.30  christos 
    427  1.30  christos 	s1 = as1;
    428  1.30  christos 	s2 = as2;
    429  1.30  christos 	while (*s1++ == *s2)
    430  1.30  christos 		if (*s2++ == '\0')
    431  1.30  christos 			return 1;
    432  1.30  christos 	return *--s1 == '\0';
    433  1.30  christos }
    434  1.30  christos 
    435  1.30  christos /*
    436  1.30  christos  * Find the correct command in the command table corresponding
    437  1.30  christos  * to the passed command "word"
    438  1.30  christos  */
    439  1.30  christos PUBLIC const struct cmd *
    440  1.30  christos lex(char word[])
    441  1.30  christos {
    442  1.30  christos 	const struct cmd *cp;
    443  1.30  christos 
    444  1.30  christos 	for (cp = &cmdtab[0]; cp->c_name != NULL; cp++)
    445  1.30  christos 		if (isprefix(word, cp->c_name))
    446  1.30  christos 			return cp;
    447  1.30  christos 	return NULL;
    448  1.30  christos }
    449  1.30  christos 
    450  1.30  christos PUBLIC char *
    451  1.30  christos get_cmdname(char *buf)
    452  1.30  christos {
    453  1.30  christos 	char *cp;
    454  1.30  christos 	char *cmd;
    455  1.30  christos 	size_t len;
    456  1.30  christos 
    457  1.30  christos 	for (cp = buf; *cp; cp++)
    458  1.30  christos 		if (strchr(" \t0123456789$^.:/-+*'\">|", *cp) != NULL)
    459  1.30  christos 			break;
    460  1.33  christos 	/* XXX - Don't miss the pipe command! */
    461  1.33  christos 	if (cp == buf && *cp == '|')
    462  1.33  christos 		cp++;
    463  1.30  christos 	len = cp - buf + 1;
    464  1.30  christos 	cmd = salloc(len);
    465  1.30  christos 	(void)strlcpy(cmd, buf, len);
    466  1.30  christos 	return cmd;
    467  1.30  christos }
    468  1.30  christos 
    469  1.30  christos /*
    470   1.1       cgd  * Execute a single command.
    471   1.1       cgd  * Command functions return 0 for success, 1 for error, and -1
    472   1.1       cgd  * for abort.  A 1 or -1 aborts a load or source.  A -1 aborts
    473   1.1       cgd  * the interactive command loop.
    474  1.32  christos  * execute_contxt_e is in extern.h.
    475   1.1       cgd  */
    476  1.30  christos PUBLIC int
    477  1.32  christos execute(char linebuf[], enum execute_contxt_e contxt)
    478   1.1       cgd {
    479  1.30  christos 	char *word;
    480   1.1       cgd 	char *arglist[MAXARGC];
    481   1.7  christos 	const struct cmd *com = NULL;
    482  1.30  christos 	char *volatile cp;
    483  1.11     lukem 	int c;
    484   1.1       cgd 	int e = 1;
    485   1.1       cgd 
    486   1.1       cgd 	/*
    487   1.1       cgd 	 * Strip the white space away from the beginning
    488   1.1       cgd 	 * of the command, then scan out a word, which
    489   1.1       cgd 	 * consists of anything except digits and white space.
    490   1.1       cgd 	 *
    491   1.1       cgd 	 * Handle ! escapes differently to get the correct
    492   1.1       cgd 	 * lexical conventions.
    493   1.1       cgd 	 */
    494   1.1       cgd 
    495  1.30  christos 	cp = skip_blank(linebuf);
    496   1.1       cgd 	if (*cp == '!') {
    497   1.1       cgd 		if (sourcing) {
    498  1.25  christos 			(void)printf("Can't \"!\" while sourcing\n");
    499   1.1       cgd 			goto out;
    500   1.1       cgd 		}
    501  1.28  christos 		(void)shell(cp + 1);
    502  1.30  christos 		return 0;
    503   1.1       cgd 	}
    504  1.30  christos 
    505  1.30  christos 	word = get_cmdname(cp);
    506  1.30  christos 	cp += strlen(word);
    507   1.1       cgd 
    508   1.1       cgd 	/*
    509   1.1       cgd 	 * Look up the command; if not found, bitch.
    510   1.1       cgd 	 * Normally, a blank command would map to the
    511   1.1       cgd 	 * first command in the table; while sourcing,
    512   1.1       cgd 	 * however, we ignore blank lines to eliminate
    513   1.1       cgd 	 * confusion.
    514   1.1       cgd 	 */
    515   1.1       cgd 
    516   1.1       cgd 	if (sourcing && *word == '\0')
    517  1.30  christos 		return 0;
    518   1.1       cgd 	com = lex(word);
    519  1.19       wiz 	if (com == NULL) {
    520  1.25  christos 		(void)printf("Unknown command: \"%s\"\n", word);
    521   1.1       cgd 		goto out;
    522   1.1       cgd 	}
    523   1.1       cgd 
    524   1.1       cgd 	/*
    525   1.1       cgd 	 * See if we should execute the command -- if a conditional
    526   1.1       cgd 	 * we always execute it, otherwise, check the state of cond.
    527   1.1       cgd 	 */
    528   1.1       cgd 
    529  1.30  christos 	if ((com->c_argtype & F) == 0 && (cond & CSKIP))
    530  1.30  christos 		return 0;
    531   1.1       cgd 
    532   1.1       cgd 	/*
    533   1.1       cgd 	 * Process the arguments to the command, depending
    534   1.1       cgd 	 * on the type he expects.  Default to an error.
    535   1.1       cgd 	 * If we are sourcing an interactive command, it's
    536   1.1       cgd 	 * an error.
    537   1.1       cgd 	 */
    538   1.1       cgd 
    539  1.30  christos 	if (mailmode == mm_sending && (com->c_argtype & M) == 0) {
    540  1.25  christos 		(void)printf("May not execute \"%s\" while sending\n",
    541   1.1       cgd 		    com->c_name);
    542   1.1       cgd 		goto out;
    543   1.1       cgd 	}
    544   1.1       cgd 	if (sourcing && com->c_argtype & I) {
    545  1.25  christos 		(void)printf("May not execute \"%s\" while sourcing\n",
    546   1.1       cgd 		    com->c_name);
    547   1.1       cgd 		goto out;
    548   1.1       cgd 	}
    549   1.1       cgd 	if (readonly && com->c_argtype & W) {
    550  1.25  christos 		(void)printf("May not execute \"%s\" -- message file is read only\n",
    551   1.1       cgd 		   com->c_name);
    552   1.1       cgd 		goto out;
    553   1.1       cgd 	}
    554  1.32  christos 	if (contxt == ec_composing && com->c_argtype & R) {
    555  1.25  christos 		(void)printf("Cannot recursively invoke \"%s\"\n", com->c_name);
    556   1.1       cgd 		goto out;
    557   1.1       cgd 	}
    558  1.30  christos 
    559  1.30  christos 	if (!sourcing && com->c_pipe && value(ENAME_INTERACTIVE) != NULL) {
    560  1.30  christos 		if (setjmp(pipestop))
    561  1.30  christos 			goto out;
    562  1.30  christos 
    563  1.30  christos 		if (setup_piping(cp, com->c_pipe) == -1)
    564  1.30  christos 			goto out;
    565  1.30  christos 	}
    566  1.30  christos 	switch (com->c_argtype & ARGTYPE_MASK) {
    567   1.1       cgd 	case MSGLIST:
    568   1.1       cgd 		/*
    569   1.1       cgd 		 * A message list defaulting to nearest forward
    570   1.1       cgd 		 * legal message.
    571   1.1       cgd 		 */
    572   1.1       cgd 		if (msgvec == 0) {
    573  1.25  christos 			(void)printf("Illegal use of \"message list\"\n");
    574   1.1       cgd 			break;
    575   1.1       cgd 		}
    576   1.1       cgd 		if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0)
    577   1.1       cgd 			break;
    578   1.1       cgd 		if (c  == 0) {
    579  1.30  christos 			*msgvec = first(com->c_msgflag,	com->c_msgmask);
    580  1.10        pk 			msgvec[1] = 0;
    581   1.1       cgd 		}
    582  1.10        pk 		if (*msgvec == 0) {
    583  1.25  christos 			(void)printf("No applicable messages\n");
    584   1.1       cgd 			break;
    585   1.1       cgd 		}
    586   1.1       cgd 		e = (*com->c_func)(msgvec);
    587   1.1       cgd 		break;
    588   1.1       cgd 
    589   1.1       cgd 	case NDMLIST:
    590   1.1       cgd 		/*
    591   1.1       cgd 		 * A message list with no defaults, but no error
    592   1.1       cgd 		 * if none exist.
    593   1.1       cgd 		 */
    594   1.1       cgd 		if (msgvec == 0) {
    595  1.25  christos 			(void)printf("Illegal use of \"message list\"\n");
    596   1.1       cgd 			break;
    597   1.1       cgd 		}
    598   1.1       cgd 		if (getmsglist(cp, msgvec, com->c_msgflag) < 0)
    599   1.1       cgd 			break;
    600   1.1       cgd 		e = (*com->c_func)(msgvec);
    601   1.1       cgd 		break;
    602   1.1       cgd 
    603   1.1       cgd 	case STRLIST:
    604   1.1       cgd 		/*
    605   1.1       cgd 		 * Just the straight string, with
    606   1.1       cgd 		 * leading blanks removed.
    607   1.1       cgd 		 */
    608  1.12  christos 		while (isspace((unsigned char)*cp))
    609   1.1       cgd 			cp++;
    610   1.1       cgd 		e = (*com->c_func)(cp);
    611   1.1       cgd 		break;
    612   1.1       cgd 
    613   1.1       cgd 	case RAWLIST:
    614   1.1       cgd 		/*
    615   1.1       cgd 		 * A vector of strings, in shell style.
    616   1.1       cgd 		 */
    617   1.1       cgd 		if ((c = getrawlist(cp, arglist,
    618   1.1       cgd 				sizeof arglist / sizeof *arglist)) < 0)
    619   1.1       cgd 			break;
    620   1.1       cgd 		if (c < com->c_minargs) {
    621  1.25  christos 			(void)printf("%s requires at least %d arg(s)\n",
    622   1.1       cgd 				com->c_name, com->c_minargs);
    623   1.1       cgd 			break;
    624   1.1       cgd 		}
    625   1.1       cgd 		if (c > com->c_maxargs) {
    626  1.25  christos 			(void)printf("%s takes no more than %d arg(s)\n",
    627   1.1       cgd 				com->c_name, com->c_maxargs);
    628   1.1       cgd 			break;
    629   1.1       cgd 		}
    630   1.1       cgd 		e = (*com->c_func)(arglist);
    631   1.1       cgd 		break;
    632   1.1       cgd 
    633   1.1       cgd 	case NOLIST:
    634   1.1       cgd 		/*
    635   1.1       cgd 		 * Just the constant zero, for exiting,
    636   1.1       cgd 		 * eg.
    637   1.1       cgd 		 */
    638   1.1       cgd 		e = (*com->c_func)(0);
    639   1.1       cgd 		break;
    640   1.1       cgd 
    641   1.1       cgd 	default:
    642  1.11     lukem 		errx(1, "Unknown argtype");
    643   1.1       cgd 	}
    644   1.1       cgd 
    645   1.1       cgd out:
    646  1.30  christos 	close_piping();
    647  1.30  christos 
    648   1.1       cgd 	/*
    649   1.1       cgd 	 * Exit the current source file on
    650   1.1       cgd 	 * error.
    651   1.1       cgd 	 */
    652   1.1       cgd 	if (e) {
    653   1.1       cgd 		if (e < 0)
    654   1.1       cgd 			return 1;
    655   1.1       cgd 		if (loading)
    656   1.1       cgd 			return 1;
    657   1.1       cgd 		if (sourcing)
    658  1.25  christos 			(void)unstack();
    659   1.1       cgd 		return 0;
    660   1.1       cgd 	}
    661   1.7  christos 	if (com == NULL)
    662  1.30  christos 		return 0;
    663  1.32  christos 	if (contxt != ec_autoprint && com->c_argtype & P &&
    664  1.32  christos 	    value(ENAME_AUTOPRINT) != NULL && (dot->m_flag & MDELETED) == 0)
    665  1.32  christos 		(void)execute(__UNCONST("print ."), ec_autoprint);
    666   1.1       cgd 	if (!sourcing && (com->c_argtype & T) == 0)
    667   1.1       cgd 		sawcom = 1;
    668  1.30  christos 	return 0;
    669   1.1       cgd }
    670   1.1       cgd 
    671   1.1       cgd 
    672   1.1       cgd /*
    673   1.1       cgd  * The following gets called on receipt of an interrupt.  This is
    674   1.1       cgd  * to abort printout of a command, mainly.
    675   1.1       cgd  * Dispatching here when command() is inactive crashes rcv.
    676   1.1       cgd  * Close all open files except 0, 1, 2, and the temporary.
    677   1.1       cgd  * Also, unstack all source files.
    678   1.1       cgd  */
    679  1.30  christos static int	inithdr;	/* am printing startup headers */
    680   1.1       cgd 
    681   1.1       cgd /*ARGSUSED*/
    682  1.30  christos static void
    683  1.28  christos intr(int s __unused)
    684   1.1       cgd {
    685   1.1       cgd 	noreset = 0;
    686   1.1       cgd 	if (!inithdr)
    687   1.1       cgd 		sawcom++;
    688   1.1       cgd 	inithdr = 0;
    689   1.1       cgd 	while (sourcing)
    690  1.25  christos 		(void)unstack();
    691   1.1       cgd 
    692  1.30  christos 	close_piping();
    693   1.1       cgd 	close_all_files();
    694   1.1       cgd 
    695   1.1       cgd 	if (image >= 0) {
    696  1.25  christos 		(void)close(image);
    697   1.1       cgd 		image = -1;
    698   1.1       cgd 	}
    699  1.25  christos 	(void)fprintf(stderr, "Interrupt\n");
    700   1.1       cgd 	reset(0);
    701   1.1       cgd }
    702   1.1       cgd 
    703   1.1       cgd /*
    704   1.1       cgd  * Branch here on hangup signal and simulate "exit".
    705   1.1       cgd  */
    706   1.1       cgd /*ARGSUSED*/
    707  1.30  christos static void
    708  1.28  christos hangup(int s __unused)
    709   1.1       cgd {
    710   1.1       cgd 	/* nothing to do? */
    711   1.1       cgd 	exit(1);
    712   1.1       cgd }
    713   1.1       cgd 
    714   1.1       cgd /*
    715  1.30  christos  * Interpret user commands one by one.  If standard input is not a tty,
    716  1.30  christos  * print no prompt.
    717   1.1       cgd  */
    718  1.30  christos PUBLIC void
    719  1.30  christos commands(void)
    720   1.1       cgd {
    721  1.30  christos 	int n;
    722  1.30  christos 	char linebuf[LINESIZE];
    723  1.30  christos 	int eofloop;
    724  1.30  christos 
    725  1.30  christos 	if (!sourcing) {
    726  1.30  christos 		if (signal(SIGINT, SIG_IGN) != SIG_IGN)
    727  1.30  christos 			(void)signal(SIGINT, intr);
    728  1.30  christos 		if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
    729  1.30  christos 			(void)signal(SIGHUP, hangup);
    730  1.30  christos 		(void)signal(SIGTSTP, stop);
    731  1.30  christos 		(void)signal(SIGTTOU, stop);
    732  1.30  christos 		(void)signal(SIGTTIN, stop);
    733  1.30  christos 	}
    734  1.30  christos 	setexit();	/* defined as (void)setjmp(srbuf) in def.h */
    735  1.30  christos 	eofloop = 0;	/* initialize this after a possible longjmp */
    736  1.30  christos 	for (;;) {
    737  1.30  christos 		(void)fflush(stdout);
    738  1.30  christos 		sreset();
    739  1.30  christos 		/*
    740  1.30  christos 		 * Print the prompt, if needed.  Clear out
    741  1.30  christos 		 * string space, and flush the output.
    742  1.30  christos 		 */
    743  1.30  christos 		if (!sourcing && value(ENAME_INTERACTIVE) != NULL) {
    744  1.30  christos 			if ((prompt = value(ENAME_PROMPT)) == NULL)
    745  1.30  christos 				prompt = DEFAULT_PROMPT;
    746  1.30  christos 			prompt = smsgprintf(prompt, dot);
    747  1.30  christos 			if ((value(ENAME_AUTOINC) != NULL) && (incfile() > 0))
    748  1.30  christos 				(void)printf("New mail has arrived.\n");
    749  1.30  christos 			reset_on_stop = 1;
    750  1.30  christos #ifndef USE_EDITLINE
    751  1.30  christos 			(void)printf("%s", prompt);
    752  1.30  christos #endif
    753  1.30  christos 		}
    754  1.30  christos 		/*
    755  1.30  christos 		 * Read a line of commands from the current input
    756  1.30  christos 		 * and handle end of file specially.
    757  1.30  christos 		 */
    758  1.30  christos 		n = 0;
    759  1.30  christos 		for (;;) {
    760  1.30  christos #ifdef USE_EDITLINE
    761  1.30  christos 			if (!sourcing) {
    762  1.30  christos 				char *line;
    763  1.30  christos 				if ((line = my_gets(&elm.command, prompt, NULL)) == NULL) {
    764  1.30  christos 					if (n == 0)
    765  1.30  christos 						n = -1;
    766  1.30  christos 					break;
    767  1.30  christos 				}
    768  1.30  christos 				(void)strlcpy(linebuf, line, sizeof(linebuf));
    769  1.30  christos 				setscreensize();	/* so we can resize a window */
    770  1.30  christos 			}
    771  1.30  christos 			else {
    772  1.30  christos 				if (mail_readline(input, &linebuf[n], LINESIZE - n) < 0) {
    773  1.30  christos 					if (n == 0)
    774  1.30  christos 						n = -1;
    775  1.30  christos 					break;
    776  1.30  christos 				}
    777  1.30  christos 			}
    778  1.30  christos #else /* USE_EDITLINE */
    779  1.30  christos 			if (mail_readline(input, &linebuf[n], LINESIZE - n) < 0) {
    780  1.30  christos 				if (n == 0)
    781  1.30  christos 					n = -1;
    782  1.30  christos 				break;
    783  1.30  christos 			}
    784  1.30  christos #endif /* USE_EDITLINE */
    785   1.1       cgd 
    786  1.30  christos 			if (sourcing) {  /* allow comments in source files */
    787  1.30  christos 				char *ptr;
    788  1.30  christos 				if ((ptr = comment_char(linebuf)) != NULL)
    789  1.30  christos 					*ptr = '\0';
    790  1.30  christos 			}
    791  1.30  christos 			if ((n = strlen(linebuf)) == 0)
    792  1.30  christos 				break;
    793  1.30  christos 			n--;
    794  1.30  christos 			if (linebuf[n] != '\\')
    795  1.30  christos 				break;
    796  1.30  christos 			linebuf[n++] = ' ';
    797  1.30  christos 		}
    798  1.30  christos 		reset_on_stop = 0;
    799  1.30  christos 		if (n < 0) {
    800  1.30  christos 				/* eof */
    801  1.30  christos 			if (loading)
    802  1.30  christos 				break;
    803  1.30  christos 			if (sourcing) {
    804  1.30  christos 				(void)unstack();
    805  1.30  christos 				continue;
    806  1.30  christos 			}
    807  1.30  christos #ifdef USE_EDITLINE
    808  1.30  christos 			{
    809  1.30  christos 				char *p;
    810  1.30  christos 				if (value(ENAME_INTERACTIVE) != NULL &&
    811  1.30  christos 				    (p = value(ENAME_IGNOREEOF)) != NULL &&
    812  1.30  christos 				    ++eofloop < (*p == '\0' ? 25 : atoi(p))) {
    813  1.30  christos 					(void)printf("Use \"quit\" to quit.\n");
    814  1.30  christos 					continue;
    815  1.30  christos 				}
    816  1.30  christos 			}
    817  1.30  christos #else
    818  1.30  christos 			if (value(ENAME_INTERACTIVE) != NULL &&
    819  1.30  christos 			    value(ENAME_IGNOREEOF) != NULL &&
    820  1.30  christos 			    ++eofloop < 25) {
    821  1.30  christos 				(void)printf("Use \"quit\" to quit.\n");
    822  1.30  christos 				continue;
    823  1.30  christos 			}
    824  1.30  christos #endif
    825  1.30  christos 			break;
    826  1.30  christos 		}
    827  1.30  christos 		eofloop = 0;
    828  1.32  christos 		if (execute(linebuf, ec_normal))
    829  1.30  christos 			break;
    830   1.1       cgd 	}
    831   1.1       cgd }
    832   1.1       cgd 
    833   1.1       cgd /*
    834   1.1       cgd  * Announce information about the file we are editing.
    835   1.1       cgd  * Return a likely place to set dot.
    836   1.1       cgd  */
    837  1.30  christos PUBLIC int
    838  1.17       wiz newfileinfo(int omsgCount)
    839   1.1       cgd {
    840  1.11     lukem 	struct message *mp;
    841  1.30  christos 	int d, n, s, t, u, mdot;
    842  1.30  christos 	char fname[PATHSIZE];
    843  1.30  christos 	char *ename;
    844   1.1       cgd 
    845  1.30  christos 	/*
    846  1.30  christos 	 * Figure out where to set the 'dot'.  Use the first new or
    847  1.30  christos 	 * unread message.
    848  1.30  christos 	 */
    849  1.30  christos 	for (mp = get_abs_message(omsgCount + 1); mp;
    850  1.30  christos 	     mp = next_abs_message(mp))
    851   1.1       cgd 		if (mp->m_flag & MNEW)
    852   1.1       cgd 			break;
    853  1.30  christos 
    854  1.30  christos 	if (mp == NULL)
    855  1.30  christos 		for (mp = get_abs_message(omsgCount + 1); mp;
    856  1.30  christos 		     mp = next_abs_message(mp))
    857   1.1       cgd 			if ((mp->m_flag & MREAD) == 0)
    858   1.1       cgd 				break;
    859  1.30  christos 	if (mp != NULL)
    860  1.30  christos 		mdot = get_msgnum(mp);
    861   1.1       cgd 	else
    862   1.8       tls 		mdot = omsgCount + 1;
    863  1.30  christos #ifdef THREAD_SUPPORT
    864  1.30  christos 	/*
    865  1.30  christos 	 * See if the message is in the current thread.
    866  1.30  christos 	 */
    867  1.30  christos 	if (mp != NULL && get_message(1) != NULL && get_message(mdot) != mp)
    868  1.30  christos 		mdot = 0;
    869  1.30  christos #endif
    870  1.30  christos 	/*
    871  1.30  christos 	 * Scan the message array counting the new, unread, deleted,
    872  1.30  christos 	 * and saved messages.
    873  1.30  christos 	 */
    874  1.30  christos 	d = n = s = t = u = 0;
    875  1.30  christos 	for (mp = get_abs_message(1); mp; mp = next_abs_message(mp)) {
    876   1.1       cgd 		if (mp->m_flag & MNEW)
    877   1.1       cgd 			n++;
    878   1.1       cgd 		if ((mp->m_flag & MREAD) == 0)
    879   1.1       cgd 			u++;
    880   1.1       cgd 		if (mp->m_flag & MDELETED)
    881   1.1       cgd 			d++;
    882   1.1       cgd 		if (mp->m_flag & MSAVED)
    883   1.1       cgd 			s++;
    884  1.30  christos 		if (mp->m_flag & MTAGGED)
    885  1.30  christos 			t++;
    886   1.1       cgd 	}
    887   1.1       cgd 	ename = mailname;
    888  1.30  christos 	if (getfold(fname, sizeof(fname)) >= 0) {
    889  1.30  christos 		char zname[PATHSIZE];
    890  1.30  christos 		size_t l;
    891   1.9     mikel 		l = strlen(fname);
    892  1.30  christos 		if (l < sizeof(fname) - 1)
    893   1.9     mikel 			fname[l++] = '/';
    894   1.9     mikel 		if (strncmp(fname, mailname, l) == 0) {
    895  1.30  christos 			(void)snprintf(zname, sizeof(zname), "+%s",
    896   1.9     mikel 			    mailname + l);
    897   1.1       cgd 			ename = zname;
    898   1.1       cgd 		}
    899   1.1       cgd 	}
    900  1.30  christos 	/*
    901  1.30  christos 	 * Display the statistics.
    902  1.30  christos 	 */
    903  1.25  christos 	(void)printf("\"%s\": ", ename);
    904  1.30  christos 	{
    905  1.30  christos 		int cnt = get_abs_msgCount();
    906  1.30  christos 		(void)printf("%d message%s", cnt, cnt == 1 ? "" : "s");
    907  1.30  christos 	}
    908   1.1       cgd 	if (n > 0)
    909  1.25  christos 		(void)printf(" %d new", n);
    910   1.1       cgd 	if (u-n > 0)
    911  1.25  christos 		(void)printf(" %d unread", u);
    912  1.30  christos 	if (t > 0)
    913  1.30  christos 		(void)printf(" %d tagged", t);
    914   1.1       cgd 	if (d > 0)
    915  1.25  christos 		(void)printf(" %d deleted", d);
    916   1.1       cgd 	if (s > 0)
    917  1.25  christos 		(void)printf(" %d saved", s);
    918   1.1       cgd 	if (readonly)
    919  1.25  christos 		(void)printf(" [Read only]");
    920  1.25  christos 	(void)printf("\n");
    921  1.30  christos 
    922  1.30  christos 	return mdot;
    923  1.30  christos }
    924  1.30  christos 
    925  1.30  christos /*
    926  1.30  christos  * Announce the presence of the current Mail version,
    927  1.30  christos  * give the message count, and print a header listing.
    928  1.30  christos  */
    929  1.30  christos PUBLIC void
    930  1.30  christos announce(void)
    931  1.30  christos {
    932  1.30  christos 	int vec[2], mdot;
    933  1.30  christos 
    934  1.30  christos 	mdot = newfileinfo(0);
    935  1.30  christos 	vec[0] = mdot;
    936  1.30  christos 	vec[1] = 0;
    937  1.30  christos 	if ((dot = get_message(mdot)) == NULL)
    938  1.30  christos 		dot = get_abs_message(1); /* make sure we get something! */
    939  1.30  christos 	if (get_abs_msgCount() > 0 && value(ENAME_NOHEADER) == NULL) {
    940  1.30  christos 		inithdr++;
    941  1.30  christos 		(void)headers(vec);
    942  1.30  christos 		inithdr = 0;
    943  1.30  christos 	}
    944   1.1       cgd }
    945   1.1       cgd 
    946   1.1       cgd /*
    947   1.1       cgd  * Print the current version number.
    948   1.1       cgd  */
    949   1.1       cgd 
    950   1.1       cgd /*ARGSUSED*/
    951  1.30  christos PUBLIC int
    952  1.28  christos pversion(void *v __unused)
    953   1.1       cgd {
    954  1.25  christos 	(void)printf("Version %s\n", version);
    955  1.30  christos 	return 0;
    956   1.1       cgd }
    957   1.1       cgd 
    958   1.1       cgd /*
    959   1.1       cgd  * Load a file of user definitions.
    960   1.1       cgd  */
    961  1.30  christos PUBLIC void
    962  1.24  christos load(const char *name)
    963   1.1       cgd {
    964  1.11     lukem 	FILE *in, *oldin;
    965   1.1       cgd 
    966   1.1       cgd 	if ((in = Fopen(name, "r")) == NULL)
    967   1.1       cgd 		return;
    968   1.1       cgd 	oldin = input;
    969   1.1       cgd 	input = in;
    970   1.1       cgd 	loading = 1;
    971   1.1       cgd 	sourcing = 1;
    972   1.1       cgd 	commands();
    973   1.1       cgd 	loading = 0;
    974   1.1       cgd 	sourcing = 0;
    975   1.1       cgd 	input = oldin;
    976  1.25  christos 	(void)Fclose(in);
    977   1.1       cgd }
    978