7d1a30911b
plain 0 should be used. This happens to work because we #define NULL to 0, but is stylistically wrong and can cause problems for people trying to port bits of code to other environments. PR: 2752 Submitted by: Arne Henrik Juul <arnej@imf.unit.no>
731 lines
14 KiB
C
731 lines
14 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)cmd3.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include "rcv.h"
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#include "extern.h"
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/*
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* Mail -- a mail program
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*
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* Still more user commands.
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*/
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/*
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* Process a shell escape by saving signals, ignoring signals,
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* and forking a sh -c
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*/
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int
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shell(str)
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char *str;
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{
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sig_t sigint = signal(SIGINT, SIG_IGN);
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char *shell;
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char cmd[BUFSIZ];
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(void) strcpy(cmd, str);
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if (bangexp(cmd) < 0)
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return 1;
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if ((shell = value("SHELL")) == NOSTR)
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shell = _PATH_CSHELL;
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(void) run_command(shell, 0, -1, -1, "-c", cmd, NOSTR);
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(void) signal(SIGINT, sigint);
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printf("!\n");
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return 0;
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}
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|
/*
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* Fork an interactive shell.
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*/
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/*ARGSUSED*/
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int
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dosh(str)
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char *str;
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{
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sig_t sigint = signal(SIGINT, SIG_IGN);
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char *shell;
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if ((shell = value("SHELL")) == NOSTR)
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shell = _PATH_CSHELL;
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(void) run_command(shell, 0, -1, -1, NOSTR, NOSTR, NOSTR);
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(void) signal(SIGINT, sigint);
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putchar('\n');
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return 0;
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}
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/*
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* Expand the shell escape by expanding unescaped !'s into the
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* last issued command where possible.
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*/
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char lastbang[128];
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int
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bangexp(str)
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char *str;
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{
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char bangbuf[BUFSIZ];
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register char *cp, *cp2;
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register int n;
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int changed = 0;
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cp = str;
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cp2 = bangbuf;
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n = BUFSIZ;
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while (*cp) {
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if (*cp == '!') {
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if (n < strlen(lastbang)) {
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overf:
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printf("Command buffer overflow\n");
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return(-1);
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}
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changed++;
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strcpy(cp2, lastbang);
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cp2 += strlen(lastbang);
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n -= strlen(lastbang);
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cp++;
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continue;
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}
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if (*cp == '\\' && cp[1] == '!') {
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if (--n <= 1)
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goto overf;
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*cp2++ = '!';
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cp += 2;
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changed++;
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}
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if (--n <= 1)
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goto overf;
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*cp2++ = *cp++;
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}
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*cp2 = 0;
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if (changed) {
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printf("!%s\n", bangbuf);
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fflush(stdout);
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}
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strcpy(str, bangbuf);
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strncpy(lastbang, bangbuf, 128);
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lastbang[127] = 0;
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return(0);
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}
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/*
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* Print out a nice help message from some file or another.
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*/
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int
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help()
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{
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register c;
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register FILE *f;
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if ((f = Fopen(_PATH_HELP, "r")) == NULL) {
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perror(_PATH_HELP);
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return(1);
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}
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while ((c = getc(f)) != EOF)
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putchar(c);
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Fclose(f);
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return(0);
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}
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/*
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* Change user's working directory.
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*/
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int
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schdir(arglist)
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char **arglist;
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{
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char *cp;
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if (*arglist == NOSTR)
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cp = homedir;
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else
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if ((cp = expand(*arglist)) == NOSTR)
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return(1);
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if (chdir(cp) < 0) {
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perror(cp);
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return(1);
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}
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return 0;
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}
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int
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respond(msgvec)
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int *msgvec;
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{
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if (value("Replyall") == NOSTR)
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return (_respond(msgvec));
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else
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return (_Respond(msgvec));
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}
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/*
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* Reply to a list of messages. Extract each name from the
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* message header and send them off to mail1()
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*/
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int
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_respond(msgvec)
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int *msgvec;
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{
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struct message *mp;
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char *cp, *rcv, *replyto;
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char **ap;
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struct name *np;
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struct header head;
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if (msgvec[1] != 0) {
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printf("Sorry, can't reply to multiple messages at once\n");
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return(1);
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}
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mp = &message[msgvec[0] - 1];
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touch(mp);
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dot = mp;
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if ((rcv = skin(hfield("from", mp))) == NOSTR)
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rcv = skin(nameof(mp, 1));
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if ((replyto = skin(hfield("reply-to", mp))) != NOSTR)
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np = extract(replyto, GTO);
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else if ((cp = skin(hfield("to", mp))) != NOSTR)
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np = extract(cp, GTO);
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else
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np = NIL;
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np = elide(np);
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/*
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* Delete my name from the reply list,
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* and with it, all my alternate names.
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*/
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np = delname(np, myname);
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if (altnames)
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for (ap = altnames; *ap; ap++)
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np = delname(np, *ap);
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if (np != NIL && replyto == NOSTR)
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np = cat(np, extract(rcv, GTO));
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else if (np == NIL) {
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if (replyto != NOSTR)
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printf("Empty reply-to field -- replying to author\n");
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np = extract(rcv, GTO);
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}
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head.h_to = np;
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if ((head.h_subject = hfield("subject", mp)) == NOSTR)
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head.h_subject = hfield("subj", mp);
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head.h_subject = reedit(head.h_subject);
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if (replyto == NOSTR && (cp = skin(hfield("cc", mp))) != NOSTR) {
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np = elide(extract(cp, GCC));
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np = delname(np, myname);
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if (altnames != 0)
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for (ap = altnames; *ap; ap++)
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np = delname(np, *ap);
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head.h_cc = np;
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} else
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head.h_cc = NIL;
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head.h_bcc = NIL;
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head.h_smopts = NIL;
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mail1(&head, 1);
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return(0);
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}
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/*
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* Modify the subject we are replying to to begin with Re: if
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* it does not already.
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*/
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char *
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reedit(subj)
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register char *subj;
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{
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char *newsubj;
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if (subj == NOSTR)
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return NOSTR;
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if ((subj[0] == 'r' || subj[0] == 'R') &&
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(subj[1] == 'e' || subj[1] == 'E') &&
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subj[2] == ':')
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return subj;
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newsubj = salloc(strlen(subj) + 5);
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strcpy(newsubj, "Re: ");
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strcpy(newsubj + 4, subj);
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return newsubj;
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}
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/*
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* Preserve the named messages, so that they will be sent
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* back to the system mailbox.
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*/
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int
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preserve(msgvec)
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int *msgvec;
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{
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register struct message *mp;
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register int *ip, mesg;
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if (edit) {
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printf("Cannot \"preserve\" in edit mode\n");
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return(1);
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}
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for (ip = msgvec; *ip != 0; ip++) {
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mesg = *ip;
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mp = &message[mesg-1];
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mp->m_flag |= MPRESERVE;
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mp->m_flag &= ~MBOX;
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dot = mp;
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}
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return(0);
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}
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|
/*
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* Mark all given messages as unread.
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*/
|
|
int
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|
unread(msgvec)
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|
int msgvec[];
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|
{
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register int *ip;
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for (ip = msgvec; *ip != 0; ip++) {
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dot = &message[*ip-1];
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dot->m_flag &= ~(MREAD|MTOUCH);
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dot->m_flag |= MSTATUS;
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}
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return(0);
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}
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|
|
/*
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|
* Print the size of each message.
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*/
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|
int
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messize(msgvec)
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|
int *msgvec;
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|
{
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|
register struct message *mp;
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|
register int *ip, mesg;
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|
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|
for (ip = msgvec; *ip != 0; ip++) {
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mesg = *ip;
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mp = &message[mesg-1];
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printf("%d: %d/%ld\n", mesg, mp->m_lines, mp->m_size);
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}
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return(0);
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}
|
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|
|
/*
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|
* Quit quickly. If we are sourcing, just pop the input level
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* by returning an error.
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*/
|
|
int
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|
rexit(e)
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int e;
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{
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if (sourcing)
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return(1);
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exit(e);
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/*NOTREACHED*/
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}
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|
|
/*
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|
* Set or display a variable value. Syntax is similar to that
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* of csh.
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|
*/
|
|
int
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set(arglist)
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|
char **arglist;
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|
{
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|
register struct var *vp;
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|
register char *cp, *cp2;
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|
char varbuf[BUFSIZ], **ap, **p;
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int errs, h, s;
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|
|
if (*arglist == NOSTR) {
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for (h = 0, s = 1; h < HSHSIZE; h++)
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for (vp = variables[h]; vp != NOVAR; vp = vp->v_link)
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s++;
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ap = (char **) salloc(s * sizeof *ap);
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for (h = 0, p = ap; h < HSHSIZE; h++)
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for (vp = variables[h]; vp != NOVAR; vp = vp->v_link)
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*p++ = vp->v_name;
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*p = NOSTR;
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sort(ap);
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for (p = ap; *p != NOSTR; p++)
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printf("%s\t%s\n", *p, value(*p));
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return(0);
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}
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|
errs = 0;
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|
for (ap = arglist; *ap != NOSTR; ap++) {
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|
cp = *ap;
|
|
cp2 = varbuf;
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while (*cp != '=' && *cp != '\0')
|
|
*cp2++ = *cp++;
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*cp2 = '\0';
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|
if (*cp == '\0')
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cp = "";
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|
else
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cp++;
|
|
if (equal(varbuf, "")) {
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printf("Non-null variable name required\n");
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errs++;
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continue;
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}
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assign(varbuf, cp);
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}
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|
return(errs);
|
|
}
|
|
|
|
/*
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|
* Unset a bunch of variable values.
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|
*/
|
|
int
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|
unset(arglist)
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|
char **arglist;
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|
{
|
|
register struct var *vp, *vp2;
|
|
int errs, h;
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|
char **ap;
|
|
|
|
errs = 0;
|
|
for (ap = arglist; *ap != NOSTR; ap++) {
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|
if ((vp2 = lookup(*ap)) == NOVAR) {
|
|
if (!sourcing) {
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|
printf("\"%s\": undefined variable\n", *ap);
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|
errs++;
|
|
}
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|
continue;
|
|
}
|
|
h = hash(*ap);
|
|
if (vp2 == variables[h]) {
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|
variables[h] = variables[h]->v_link;
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vfree(vp2->v_name);
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|
vfree(vp2->v_value);
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|
free((char *)vp2);
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|
continue;
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|
}
|
|
for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link)
|
|
;
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|
vp->v_link = vp2->v_link;
|
|
vfree(vp2->v_name);
|
|
vfree(vp2->v_value);
|
|
free((char *) vp2);
|
|
}
|
|
return(errs);
|
|
}
|
|
|
|
/*
|
|
* Put add users to a group.
|
|
*/
|
|
int
|
|
group(argv)
|
|
char **argv;
|
|
{
|
|
register struct grouphead *gh;
|
|
register struct group *gp;
|
|
register int h;
|
|
int s;
|
|
char **ap, *gname, **p;
|
|
|
|
if (*argv == NOSTR) {
|
|
for (h = 0, s = 1; h < HSHSIZE; h++)
|
|
for (gh = groups[h]; gh != NOGRP; gh = gh->g_link)
|
|
s++;
|
|
ap = (char **) salloc(s * sizeof *ap);
|
|
for (h = 0, p = ap; h < HSHSIZE; h++)
|
|
for (gh = groups[h]; gh != NOGRP; gh = gh->g_link)
|
|
*p++ = gh->g_name;
|
|
*p = NOSTR;
|
|
sort(ap);
|
|
for (p = ap; *p != NOSTR; p++)
|
|
printgroup(*p);
|
|
return(0);
|
|
}
|
|
if (argv[1] == NOSTR) {
|
|
printgroup(*argv);
|
|
return(0);
|
|
}
|
|
gname = *argv;
|
|
h = hash(gname);
|
|
if ((gh = findgroup(gname)) == NOGRP) {
|
|
gh = (struct grouphead *) calloc(sizeof *gh, 1);
|
|
gh->g_name = vcopy(gname);
|
|
gh->g_list = NOGE;
|
|
gh->g_link = groups[h];
|
|
groups[h] = gh;
|
|
}
|
|
|
|
/*
|
|
* Insert names from the command list into the group.
|
|
* Who cares if there are duplicates? They get tossed
|
|
* later anyway.
|
|
*/
|
|
|
|
for (ap = argv+1; *ap != NOSTR; ap++) {
|
|
gp = (struct group *) calloc(sizeof *gp, 1);
|
|
gp->ge_name = vcopy(*ap);
|
|
gp->ge_link = gh->g_list;
|
|
gh->g_list = gp;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Sort the passed string vecotor into ascending dictionary
|
|
* order.
|
|
*/
|
|
void
|
|
sort(list)
|
|
char **list;
|
|
{
|
|
register char **ap;
|
|
int diction();
|
|
|
|
for (ap = list; *ap != NOSTR; ap++)
|
|
;
|
|
if (ap-list < 2)
|
|
return;
|
|
qsort(list, ap-list, sizeof(*list), diction);
|
|
}
|
|
|
|
/*
|
|
* Do a dictionary order comparison of the arguments from
|
|
* qsort.
|
|
*/
|
|
int
|
|
diction(a, b)
|
|
const void *a, *b;
|
|
{
|
|
return(strcmp(*(char **)a, *(char **)b));
|
|
}
|
|
|
|
/*
|
|
* The do nothing command for comments.
|
|
*/
|
|
|
|
/*ARGSUSED*/
|
|
int
|
|
null(e)
|
|
int e;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Change to another file. With no argument, print information about
|
|
* the current file.
|
|
*/
|
|
int
|
|
file(argv)
|
|
register char **argv;
|
|
{
|
|
|
|
if (argv[0] == NOSTR) {
|
|
newfileinfo();
|
|
return 0;
|
|
}
|
|
if (setfile(*argv) < 0)
|
|
return 1;
|
|
announce();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Expand file names like echo
|
|
*/
|
|
int
|
|
echo(argv)
|
|
char **argv;
|
|
{
|
|
register char **ap;
|
|
register char *cp;
|
|
|
|
for (ap = argv; *ap != NOSTR; ap++) {
|
|
cp = *ap;
|
|
if ((cp = expand(cp)) != NOSTR) {
|
|
if (ap != argv)
|
|
putchar(' ');
|
|
printf("%s", cp);
|
|
}
|
|
}
|
|
putchar('\n');
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
Respond(msgvec)
|
|
int *msgvec;
|
|
{
|
|
if (value("Replyall") == NOSTR)
|
|
return (_Respond(msgvec));
|
|
else
|
|
return (_respond(msgvec));
|
|
}
|
|
|
|
/*
|
|
* Reply to a series of messages by simply mailing to the senders
|
|
* and not messing around with the To: and Cc: lists as in normal
|
|
* reply.
|
|
*/
|
|
int
|
|
_Respond(msgvec)
|
|
int msgvec[];
|
|
{
|
|
struct header head;
|
|
struct message *mp;
|
|
register int *ap;
|
|
register char *cp;
|
|
|
|
head.h_to = NIL;
|
|
for (ap = msgvec; *ap != 0; ap++) {
|
|
mp = &message[*ap - 1];
|
|
touch(mp);
|
|
dot = mp;
|
|
if ((cp = skin(hfield("from", mp))) == NOSTR)
|
|
cp = skin(nameof(mp, 2));
|
|
head.h_to = cat(head.h_to, extract(cp, GTO));
|
|
}
|
|
if (head.h_to == NIL)
|
|
return 0;
|
|
mp = &message[msgvec[0] - 1];
|
|
if ((head.h_subject = hfield("subject", mp)) == NOSTR)
|
|
head.h_subject = hfield("subj", mp);
|
|
head.h_subject = reedit(head.h_subject);
|
|
head.h_cc = NIL;
|
|
head.h_bcc = NIL;
|
|
head.h_smopts = NIL;
|
|
mail1(&head, 1);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Conditional commands. These allow one to parameterize one's
|
|
* .mailrc and do some things if sending, others if receiving.
|
|
*/
|
|
int
|
|
ifcmd(argv)
|
|
char **argv;
|
|
{
|
|
register char *cp;
|
|
|
|
if (cond != CANY) {
|
|
printf("Illegal nested \"if\"\n");
|
|
return(1);
|
|
}
|
|
cond = CANY;
|
|
cp = argv[0];
|
|
switch (*cp) {
|
|
case 'r': case 'R':
|
|
cond = CRCV;
|
|
break;
|
|
|
|
case 's': case 'S':
|
|
cond = CSEND;
|
|
break;
|
|
|
|
default:
|
|
printf("Unrecognized if-keyword: \"%s\"\n", cp);
|
|
return(1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Implement 'else'. This is pretty simple -- we just
|
|
* flip over the conditional flag.
|
|
*/
|
|
int
|
|
elsecmd()
|
|
{
|
|
|
|
switch (cond) {
|
|
case CANY:
|
|
printf("\"Else\" without matching \"if\"\n");
|
|
return(1);
|
|
|
|
case CSEND:
|
|
cond = CRCV;
|
|
break;
|
|
|
|
case CRCV:
|
|
cond = CSEND;
|
|
break;
|
|
|
|
default:
|
|
printf("Mail's idea of conditions is screwed up\n");
|
|
cond = CANY;
|
|
break;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* End of if statement. Just set cond back to anything.
|
|
*/
|
|
int
|
|
endifcmd()
|
|
{
|
|
|
|
if (cond == CANY) {
|
|
printf("\"Endif\" without matching \"if\"\n");
|
|
return(1);
|
|
}
|
|
cond = CANY;
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Set the list of alternate names.
|
|
*/
|
|
int
|
|
alternates(namelist)
|
|
char **namelist;
|
|
{
|
|
register int c;
|
|
register char **ap, **ap2, *cp;
|
|
|
|
c = argcount(namelist) + 1;
|
|
if (c == 1) {
|
|
if (altnames == 0)
|
|
return(0);
|
|
for (ap = altnames; *ap; ap++)
|
|
printf("%s ", *ap);
|
|
printf("\n");
|
|
return(0);
|
|
}
|
|
if (altnames != 0)
|
|
free((char *) altnames);
|
|
altnames = (char **) calloc((unsigned) c, sizeof (char *));
|
|
for (ap = namelist, ap2 = altnames; *ap; ap++, ap2++) {
|
|
cp = (char *) calloc((unsigned) strlen(*ap) + 1, sizeof (char));
|
|
strcpy(cp, *ap);
|
|
*ap2 = cp;
|
|
}
|
|
*ap2 = 0;
|
|
return(0);
|
|
}
|