summaryrefslogtreecommitdiffstats
path: root/usr.bin/mail/lex.c
diff options
context:
space:
mode:
Diffstat (limited to 'usr.bin/mail/lex.c')
-rw-r--r--usr.bin/mail/lex.c665
1 files changed, 0 insertions, 665 deletions
diff --git a/usr.bin/mail/lex.c b/usr.bin/mail/lex.c
deleted file mode 100644
index 3428203..0000000
--- a/usr.bin/mail/lex.c
+++ /dev/null
@@ -1,665 +0,0 @@
-/*
- * Copyright (c) 1980, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-static char sccsid[] = "@(#)lex.c 8.1 (Berkeley) 6/6/93";
-#endif /* not lint */
-
-#include "rcv.h"
-#include <errno.h>
-#include <fcntl.h>
-#include "extern.h"
-
-/*
- * Mail -- a mail program
- *
- * Lexical processing of commands.
- */
-
-char *prompt = "& ";
-
-/*
- * Set up editing on the given file name.
- * If the first character of name is %, we are considered to be
- * editing the file, otherwise we are reading our mail which has
- * signficance for mbox and so forth.
- */
-int
-setfile(name)
- char *name;
-{
- FILE *ibuf;
- int i;
- struct stat stb;
- char isedit = *name != '%';
- char *who = name[1] ? name + 1 : myname;
- static int shudclob;
- extern char tempMesg[];
- extern int errno;
-
- if ((name = expand(name)) == NOSTR)
- return -1;
-
- if ((ibuf = Fopen(name, "r")) == NULL) {
- if (!isedit && errno == ENOENT)
- goto nomail;
- perror(name);
- return(-1);
- }
-
- if (fstat(fileno(ibuf), &stb) < 0) {
- perror("fstat");
- Fclose(ibuf);
- return (-1);
- }
-
- switch (stb.st_mode & S_IFMT) {
- case S_IFDIR:
- Fclose(ibuf);
- errno = EISDIR;
- perror(name);
- return (-1);
-
- case S_IFREG:
- break;
-
- default:
- Fclose(ibuf);
- errno = EINVAL;
- perror(name);
- return (-1);
- }
-
- /*
- * Looks like all will be well. We must now relinquish our
- * hold on the current set of stuff. Must hold signals
- * while we are reading the new file, else we will ruin
- * the message[] data structure.
- */
-
- holdsigs();
- if (shudclob)
- quit();
-
- /*
- * Copy the messages into /tmp
- * and set pointers.
- */
-
- readonly = 0;
- if ((i = open(name, 1)) < 0)
- readonly++;
- else
- close(i);
- if (shudclob) {
- fclose(itf);
- fclose(otf);
- }
- shudclob = 1;
- edit = isedit;
- strcpy(prevfile, mailname);
- if (name != mailname)
- strcpy(mailname, name);
- mailsize = fsize(ibuf);
- if ((otf = fopen(tempMesg, "w")) == NULL) {
- perror(tempMesg);
- exit(1);
- }
- (void) fcntl(fileno(otf), F_SETFD, 1);
- if ((itf = fopen(tempMesg, "r")) == NULL) {
- perror(tempMesg);
- exit(1);
- }
- (void) fcntl(fileno(itf), F_SETFD, 1);
- rm(tempMesg);
- setptr(ibuf);
- setmsize(msgCount);
- Fclose(ibuf);
- relsesigs();
- sawcom = 0;
- if (!edit && msgCount == 0) {
-nomail:
- fprintf(stderr, "No mail for %s\n", who);
- return -1;
- }
- return(0);
-}
-
-int *msgvec;
-int reset_on_stop; /* do a reset() if stopped */
-
-/*
- * Interpret user commands one by one. If standard input is not a tty,
- * print no prompt.
- */
-void
-commands()
-{
- int eofloop = 0;
- register int n;
- char linebuf[LINESIZE];
- void intr(), stop(), hangup();
-
- if (!sourcing) {
- if (signal(SIGINT, SIG_IGN) != SIG_IGN)
- signal(SIGINT, intr);
- if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
- signal(SIGHUP, hangup);
- signal(SIGTSTP, stop);
- signal(SIGTTOU, stop);
- signal(SIGTTIN, stop);
- }
- setexit();
- for (;;) {
- /*
- * Print the prompt, if needed. Clear out
- * string space, and flush the output.
- */
- if (!sourcing && value("interactive") != NOSTR) {
- reset_on_stop = 1;
- printf(prompt);
- }
- fflush(stdout);
- sreset();
- /*
- * Read a line of commands from the current input
- * and handle end of file specially.
- */
- n = 0;
- for (;;) {
- if (readline(input, &linebuf[n], LINESIZE - n) < 0) {
- if (n == 0)
- n = -1;
- break;
- }
- if ((n = strlen(linebuf)) == 0)
- break;
- n--;
- if (linebuf[n] != '\\')
- break;
- linebuf[n++] = ' ';
- }
- reset_on_stop = 0;
- if (n < 0) {
- /* eof */
- if (loading)
- break;
- if (sourcing) {
- unstack();
- continue;
- }
- if (value("interactive") != NOSTR &&
- value("ignoreeof") != NOSTR &&
- ++eofloop < 25) {
- printf("Use \"quit\" to quit.\n");
- continue;
- }
- break;
- }
- eofloop = 0;
- if (execute(linebuf, 0))
- break;
- }
-}
-
-/*
- * Execute a single command.
- * Command functions return 0 for success, 1 for error, and -1
- * for abort. A 1 or -1 aborts a load or source. A -1 aborts
- * the interactive command loop.
- * Contxt is non-zero if called while composing mail.
- */
-int
-execute(linebuf, contxt)
- char linebuf[];
- int contxt;
-{
- char word[LINESIZE];
- char *arglist[MAXARGC];
- struct cmd *com;
- register char *cp, *cp2;
- register int c;
- int muvec[2];
- int e = 1;
-
- /*
- * Strip the white space away from the beginning
- * of the command, then scan out a word, which
- * consists of anything except digits and white space.
- *
- * Handle ! escapes differently to get the correct
- * lexical conventions.
- */
-
- for (cp = linebuf; isspace(*cp); cp++)
- ;
- if (*cp == '!') {
- if (sourcing) {
- printf("Can't \"!\" while sourcing\n");
- goto out;
- }
- shell(cp+1);
- return(0);
- }
- cp2 = word;
- while (*cp && index(" \t0123456789$^.:/-+*'\"", *cp) == NOSTR)
- *cp2++ = *cp++;
- *cp2 = '\0';
-
- /*
- * Look up the command; if not found, bitch.
- * Normally, a blank command would map to the
- * first command in the table; while sourcing,
- * however, we ignore blank lines to eliminate
- * confusion.
- */
-
- if (sourcing && *word == '\0')
- return(0);
- com = lex(word);
- if (com == NONE) {
- printf("Unknown command: \"%s\"\n", word);
- goto out;
- }
-
- /*
- * See if we should execute the command -- if a conditional
- * we always execute it, otherwise, check the state of cond.
- */
-
- if ((com->c_argtype & F) == 0)
- if (cond == CRCV && !rcvmode || cond == CSEND && rcvmode)
- return(0);
-
- /*
- * Process the arguments to the command, depending
- * on the type he expects. Default to an error.
- * If we are sourcing an interactive command, it's
- * an error.
- */
-
- if (!rcvmode && (com->c_argtype & M) == 0) {
- printf("May not execute \"%s\" while sending\n",
- com->c_name);
- goto out;
- }
- if (sourcing && com->c_argtype & I) {
- printf("May not execute \"%s\" while sourcing\n",
- com->c_name);
- goto out;
- }
- if (readonly && com->c_argtype & W) {
- printf("May not execute \"%s\" -- message file is read only\n",
- com->c_name);
- goto out;
- }
- if (contxt && com->c_argtype & R) {
- printf("Cannot recursively invoke \"%s\"\n", com->c_name);
- goto out;
- }
- switch (com->c_argtype & ~(F|P|I|M|T|W|R)) {
- case MSGLIST:
- /*
- * A message list defaulting to nearest forward
- * legal message.
- */
- if (msgvec == 0) {
- printf("Illegal use of \"message list\"\n");
- break;
- }
- if ((c = getmsglist(cp, msgvec, com->c_msgflag)) < 0)
- break;
- if (c == 0) {
- *msgvec = first(com->c_msgflag,
- com->c_msgmask);
- msgvec[1] = NULL;
- }
- if (*msgvec == NULL) {
- printf("No applicable messages\n");
- break;
- }
- e = (*com->c_func)(msgvec);
- break;
-
- case NDMLIST:
- /*
- * A message list with no defaults, but no error
- * if none exist.
- */
- if (msgvec == 0) {
- printf("Illegal use of \"message list\"\n");
- break;
- }
- if (getmsglist(cp, msgvec, com->c_msgflag) < 0)
- break;
- e = (*com->c_func)(msgvec);
- break;
-
- case STRLIST:
- /*
- * Just the straight string, with
- * leading blanks removed.
- */
- while (isspace(*cp))
- cp++;
- e = (*com->c_func)(cp);
- break;
-
- case RAWLIST:
- /*
- * A vector of strings, in shell style.
- */
- if ((c = getrawlist(cp, arglist,
- sizeof arglist / sizeof *arglist)) < 0)
- break;
- if (c < com->c_minargs) {
- printf("%s requires at least %d arg(s)\n",
- com->c_name, com->c_minargs);
- break;
- }
- if (c > com->c_maxargs) {
- printf("%s takes no more than %d arg(s)\n",
- com->c_name, com->c_maxargs);
- break;
- }
- e = (*com->c_func)(arglist);
- break;
-
- case NOLIST:
- /*
- * Just the constant zero, for exiting,
- * eg.
- */
- e = (*com->c_func)(0);
- break;
-
- default:
- panic("Unknown argtype");
- }
-
-out:
- /*
- * Exit the current source file on
- * error.
- */
- if (e) {
- if (e < 0)
- return 1;
- if (loading)
- return 1;
- if (sourcing)
- unstack();
- return 0;
- }
- if (value("autoprint") != NOSTR && com->c_argtype & P)
- if ((dot->m_flag & MDELETED) == 0) {
- muvec[0] = dot - &message[0] + 1;
- muvec[1] = 0;
- type(muvec);
- }
- if (!sourcing && (com->c_argtype & T) == 0)
- sawcom = 1;
- return(0);
-}
-
-/*
- * Set the size of the message vector used to construct argument
- * lists to message list functions.
- */
-void
-setmsize(sz)
- int sz;
-{
-
- if (msgvec != 0)
- free((char *) msgvec);
- msgvec = (int *) calloc((unsigned) (sz + 1), sizeof *msgvec);
-}
-
-/*
- * Find the correct command in the command table corresponding
- * to the passed command "word"
- */
-
-struct cmd *
-lex(word)
- char word[];
-{
- register struct cmd *cp;
- extern struct cmd cmdtab[];
-
- for (cp = &cmdtab[0]; cp->c_name != NOSTR; cp++)
- if (isprefix(word, cp->c_name))
- return(cp);
- return(NONE);
-}
-
-/*
- * Determine if as1 is a valid prefix of as2.
- * Return true if yep.
- */
-int
-isprefix(as1, as2)
- char *as1, *as2;
-{
- register char *s1, *s2;
-
- s1 = as1;
- s2 = as2;
- while (*s1++ == *s2)
- if (*s2++ == '\0')
- return(1);
- return(*--s1 == '\0');
-}
-
-/*
- * The following gets called on receipt of an interrupt. This is
- * to abort printout of a command, mainly.
- * Dispatching here when command() is inactive crashes rcv.
- * Close all open files except 0, 1, 2, and the temporary.
- * Also, unstack all source files.
- */
-
-int inithdr; /* am printing startup headers */
-
-/*ARGSUSED*/
-void
-intr(s)
- int s;
-{
-
- noreset = 0;
- if (!inithdr)
- sawcom++;
- inithdr = 0;
- while (sourcing)
- unstack();
-
- close_all_files();
-
- if (image >= 0) {
- close(image);
- image = -1;
- }
- fprintf(stderr, "Interrupt\n");
- reset(0);
-}
-
-/*
- * When we wake up after ^Z, reprint the prompt.
- */
-void
-stop(s)
- int s;
-{
- sig_t old_action = signal(s, SIG_DFL);
-
- sigsetmask(sigblock(0) & ~sigmask(s));
- kill(0, s);
- sigblock(sigmask(s));
- signal(s, old_action);
- if (reset_on_stop) {
- reset_on_stop = 0;
- reset(0);
- }
-}
-
-/*
- * Branch here on hangup signal and simulate "exit".
- */
-/*ARGSUSED*/
-void
-hangup(s)
- int s;
-{
-
- /* nothing to do? */
- exit(1);
-}
-
-/*
- * Announce the presence of the current Mail version,
- * give the message count, and print a header listing.
- */
-void
-announce()
-{
- int vec[2], mdot;
-
- mdot = newfileinfo();
- vec[0] = mdot;
- vec[1] = 0;
- dot = &message[mdot - 1];
- if (msgCount > 0 && value("noheader") == NOSTR) {
- inithdr++;
- headers(vec);
- inithdr = 0;
- }
-}
-
-/*
- * Announce information about the file we are editing.
- * Return a likely place to set dot.
- */
-int
-newfileinfo()
-{
- register struct message *mp;
- register int u, n, mdot, d, s;
- char fname[BUFSIZ], zname[BUFSIZ], *ename;
-
- for (mp = &message[0]; mp < &message[msgCount]; mp++)
- if (mp->m_flag & MNEW)
- break;
- if (mp >= &message[msgCount])
- for (mp = &message[0]; mp < &message[msgCount]; mp++)
- if ((mp->m_flag & MREAD) == 0)
- break;
- if (mp < &message[msgCount])
- mdot = mp - &message[0] + 1;
- else
- mdot = 1;
- s = d = 0;
- for (mp = &message[0], n = 0, u = 0; mp < &message[msgCount]; mp++) {
- if (mp->m_flag & MNEW)
- n++;
- if ((mp->m_flag & MREAD) == 0)
- u++;
- if (mp->m_flag & MDELETED)
- d++;
- if (mp->m_flag & MSAVED)
- s++;
- }
- ename = mailname;
- if (getfold(fname) >= 0) {
- strcat(fname, "/");
- if (strncmp(fname, mailname, strlen(fname)) == 0) {
- sprintf(zname, "+%s", mailname + strlen(fname));
- ename = zname;
- }
- }
- printf("\"%s\": ", ename);
- if (msgCount == 1)
- printf("1 message");
- else
- printf("%d messages", msgCount);
- if (n > 0)
- printf(" %d new", n);
- if (u-n > 0)
- printf(" %d unread", u);
- if (d > 0)
- printf(" %d deleted", d);
- if (s > 0)
- printf(" %d saved", s);
- if (readonly)
- printf(" [Read only]");
- printf("\n");
- return(mdot);
-}
-
-/*
- * Print the current version number.
- */
-
-/*ARGSUSED*/
-int
-pversion(e)
- int e;
-{
- extern char *version;
-
- printf("Version %s\n", version);
- return(0);
-}
-
-/*
- * Load a file of user definitions.
- */
-void
-load(name)
- char *name;
-{
- register FILE *in, *oldin;
-
- if ((in = Fopen(name, "r")) == NULL)
- return;
- oldin = input;
- input = in;
- loading = 1;
- sourcing = 1;
- commands();
- loading = 0;
- sourcing = 0;
- input = oldin;
- Fclose(in);
-}
OpenPOWER on IntegriCloud