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- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and that due credit is given
- * to the University of California at Berkeley. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission. This software
- * is provided ``as is'' without express or implied warranty.
- */
-
- #ifdef notdef
- static char sccsid[] = "@(#)cmd3.c 5.5 (Berkeley) 2/18/88";
- #endif /* notdef */
-
- #include "rcv.h"
- #include <sys/stat.h>
- #include <sys/wait.h>
-
- /*
- * Mail -- a mail program
- *
- * Still more user commands.
- */
-
- /*
- * Process a shell escape by saving signals, ignoring signals,
- * and forking a sh -c
- */
-
- shell(str)
- char *str;
- {
- int (*sigint)(), (*sigquit)();
- union wait stat;
- register int t;
- char *Shell;
- char cmd[BUFSIZ];
-
- strcpy(cmd, str);
- if (bangexp(cmd) < 0)
- return(-1);
- if ((Shell = value("SHELL")) == NOSTR)
- Shell = SHELL;
- sigint = signal(SIGINT, SIG_IGN);
- sigquit = signal(SIGQUIT, SIG_IGN);
- t = vfork();
- if (t == 0) {
- if (sigint != SIG_IGN)
- signal(SIGINT, SIG_DFL);
- if (sigquit != SIG_IGN)
- signal(SIGQUIT, SIG_DFL);
- execl(Shell, Shell, "-c", cmd, (char *)0);
- perror(Shell);
- _exit(1);
- }
- while (wait(&stat) != t)
- ;
- if (t == -1)
- perror("fork");
- signal(SIGINT, sigint);
- signal(SIGQUIT, sigquit);
- printf("!\n");
- return(0);
- }
-
- /*
- * Fork an interactive shell.
- */
-
- /*ARGSUSED*/
- dosh(str)
- char *str;
- {
- int (*sigint)(), (*sigquit)();
- union wait stat;
- register int t;
- char *Shell;
-
- if ((Shell = value("SHELL")) == NOSTR)
- Shell = SHELL;
- sigint = signal(SIGINT, SIG_IGN);
- sigquit = signal(SIGQUIT, SIG_IGN);
- t = vfork();
- if (t == 0) {
- if (sigint != SIG_IGN)
- signal(SIGINT, SIG_DFL);
- if (sigquit != SIG_IGN)
- signal(SIGQUIT, SIG_DFL);
- execl(Shell, Shell, (char *)0);
- perror(Shell);
- _exit(1);
- }
- while (wait(&stat) != t)
- ;
- if (t == -1)
- perror("fork");
- signal(SIGINT, sigint);
- signal(SIGQUIT, sigquit);
- putchar('\n');
- return(0);
- }
-
- /*
- * Expand the shell escape by expanding unescaped !'s into the
- * last issued command where possible.
- */
-
- char lastbang[128];
-
- bangexp(str)
- char *str;
- {
- char bangbuf[BUFSIZ];
- register char *cp, *cp2;
- register int n;
- int changed = 0;
-
- cp = str;
- cp2 = bangbuf;
- n = BUFSIZ;
- while (*cp) {
- if (*cp == '!') {
- if (n < strlen(lastbang)) {
- overf:
- printf("Command buffer overflow\n");
- return(-1);
- }
- changed++;
- strcpy(cp2, lastbang);
- cp2 += strlen(lastbang);
- n -= strlen(lastbang);
- cp++;
- continue;
- }
- if (*cp == '\\' && cp[1] == '!') {
- if (--n <= 1)
- goto overf;
- *cp2++ = '!';
- cp += 2;
- changed++;
- }
- if (--n <= 1)
- goto overf;
- *cp2++ = *cp++;
- }
- *cp2 = 0;
- if (changed) {
- printf("!%s\n", bangbuf);
- fflush(stdout);
- }
- strcpy(str, bangbuf);
- strncpy(lastbang, bangbuf, 128);
- lastbang[127] = 0;
- return(0);
- }
-
- /*
- * Print out a nice help message from some file or another.
- */
-
- help()
- {
- register c;
- register FILE *f;
-
- if ((f = fopen(HELPFILE, "r")) == NULL) {
- perror(HELPFILE);
- return(1);
- }
- while ((c = getc(f)) != EOF)
- putchar(c);
- fclose(f);
- return(0);
- }
-
- /*
- * Change user's working directory.
- */
-
- schdir(str)
- char *str;
- {
- register char *cp;
-
- for (cp = str; *cp == ' '; cp++)
- ;
- if (*cp == '\0')
- cp = homedir;
- else
- if ((cp = expand(cp)) == NOSTR)
- return(1);
- if (chdir(cp) < 0) {
- perror(cp);
- return(1);
- }
- return(0);
- }
-
- respond(msgvec)
- int *msgvec;
- {
- if (value("Replyall") == NOSTR)
- return (_respond(msgvec));
- else
- return (_Respond(msgvec));
- }
-
- /*
- * Reply to a list of messages. Extract each name from the
- * message header and send them off to mail1()
- */
-
- _respond(msgvec)
- int *msgvec;
- {
- struct message *mp;
- char *cp, *rcv, *replyto;
- char buf[2 * LINESIZE], **ap;
- struct name *np;
- struct header head;
-
- if (msgvec[1] != 0) {
- printf("Sorry, can't reply to multiple messages at once\n");
- return(1);
- }
- mp = &message[msgvec[0] - 1];
- dot = mp;
- rcv = NOSTR;
- cp = skin(nameof(mp, 1));
- if (cp != NOSTR)
- rcv = cp;
- cp = skin(hfield("from", mp));
- if (cp != NOSTR)
- rcv = cp;
- replyto = skin(hfield("reply-to", mp));
- strcpy(buf, "");
- if (replyto != NOSTR)
- strcpy(buf, replyto);
- else {
- cp = skin(hfield("to", mp));
- if (cp != NOSTR)
- strcpy(buf, cp);
- }
- np = elide(extract(buf, GTO));
- mapf(np, rcv);
- /*
- * Delete my name from the reply list,
- * and with it, all my alternate names.
- */
- np = delname(np, myname, icequal);
- if (altnames)
- for (ap = altnames; *ap; ap++)
- np = delname(np, *ap, icequal);
- head.h_seq = 1;
- cp = detract(np, 0);
- if (cp != NOSTR && replyto == NOSTR) {
- strcpy(buf, cp);
- strcat(buf, " ");
- strcat(buf, rcv);
- }
- else {
- if (cp == NOSTR && replyto != NOSTR)
- printf("Empty reply-to field -- replying to author\n");
- if (cp == NOSTR)
- strcpy(buf, rcv);
- else
- strcpy(buf, cp);
- }
- head.h_to = buf;
- head.h_subject = hfield("subject", mp);
- if (head.h_subject == NOSTR)
- head.h_subject = hfield("subj", mp);
- head.h_subject = reedit(head.h_subject);
- head.h_cc = NOSTR;
- if (replyto == NOSTR) {
- cp = skin(hfield("cc", mp));
- if (cp != NOSTR) {
- np = elide(extract(cp, GCC));
- mapf(np, rcv);
- np = delname(np, myname, icequal);
- if (altnames != 0)
- for (ap = altnames; *ap; ap++)
- np = delname(np, *ap, icequal);
- head.h_cc = detract(np, 0);
- }
- }
- head.h_bcc = NOSTR;
- mail1(&head);
- return(0);
- }
-
- /*
- * Modify the subject we are replying to to begin with Re: if
- * it does not already.
- */
-
- char *
- reedit(subj)
- char *subj;
- {
- char sbuf[10];
- register char *newsubj;
-
- if (subj == NOSTR)
- return(NOSTR);
- strncpy(sbuf, subj, 3);
- sbuf[3] = 0;
- if (icequal(sbuf, "re:"))
- return(subj);
- newsubj = salloc(strlen(subj) + 6);
- sprintf(newsubj, "Re: %s", subj);
- return(newsubj);
- }
-
- /*
- * Preserve the named messages, so that they will be sent
- * back to the system mailbox.
- */
-
- preserve(msgvec)
- int *msgvec;
- {
- register struct message *mp;
- register int *ip, mesg;
-
- if (edit) {
- printf("Cannot \"preserve\" in edit mode\n");
- return(1);
- }
- for (ip = msgvec; *ip != NULL; ip++) {
- mesg = *ip;
- mp = &message[mesg-1];
- mp->m_flag |= MPRESERVE;
- mp->m_flag &= ~MBOX;
- dot = mp;
- }
- return(0);
- }
-
- /*
- * Mark all given messages as unread.
- */
- unread(msgvec)
- int msgvec[];
- {
- register int *ip;
-
- for (ip = msgvec; *ip != NULL; ip++) {
- dot = &message[*ip-1];
- dot->m_flag &= ~(MREAD|MTOUCH);
- dot->m_flag |= MSTATUS;
- }
- return(0);
- }
-
- /*
- * Print the size of each message.
- */
-
- messize(msgvec)
- int *msgvec;
- {
- register struct message *mp;
- register int *ip, mesg;
-
- for (ip = msgvec; *ip != NULL; ip++) {
- mesg = *ip;
- mp = &message[mesg-1];
- printf("%d: %d/%ld\n", mesg, mp->m_lines, mp->m_size);
- }
- return(0);
- }
-
- /*
- * Quit quickly. If we are sourcing, just pop the input level
- * by returning an error.
- */
-
- rexit(e)
- {
- if (sourcing)
- return(1);
- if (Tflag != NOSTR)
- close(creat(Tflag, 0600));
- exit(e);
- /*NOTREACHED*/
- }
-
- /*
- * Set or display a variable value. Syntax is similar to that
- * of csh.
- */
-
- set(arglist)
- char **arglist;
- {
- register struct var *vp;
- register char *cp, *cp2;
- char varbuf[BUFSIZ], **ap, **p;
- int errs, h, s;
-
- if (argcount(arglist) == 0) {
- for (h = 0, s = 1; h < HSHSIZE; h++)
- for (vp = variables[h]; vp != NOVAR; vp = vp->v_link)
- s++;
- ap = (char **) salloc(s * sizeof *ap);
- for (h = 0, p = ap; h < HSHSIZE; h++)
- for (vp = variables[h]; vp != NOVAR; vp = vp->v_link)
- *p++ = vp->v_name;
- *p = NOSTR;
- sort(ap);
- for (p = ap; *p != NOSTR; p++)
- printf("%s\t%s\n", *p, value(*p));
- return(0);
- }
- errs = 0;
- for (ap = arglist; *ap != NOSTR; ap++) {
- cp = *ap;
- cp2 = varbuf;
- while (*cp != '=' && *cp != '\0')
- *cp2++ = *cp++;
- *cp2 = '\0';
- if (*cp == '\0')
- cp = "";
- else
- cp++;
- if (equal(varbuf, "")) {
- printf("Non-null variable name required\n");
- errs++;
- continue;
- }
- assign(varbuf, cp);
- }
- return(errs);
- }
-
- /*
- * Unset a bunch of variable values.
- */
-
- unset(arglist)
- char **arglist;
- {
- register struct var *vp, *vp2;
- int errs, h;
- char **ap;
-
- errs = 0;
- for (ap = arglist; *ap != NOSTR; ap++) {
- if ((vp2 = lookup(*ap)) == NOVAR) {
- if (!sourcing) {
- printf("\"%s\": undefined variable\n", *ap);
- errs++;
- }
- continue;
- }
- h = hash(*ap);
- if (vp2 == variables[h]) {
- variables[h] = variables[h]->v_link;
- vfree(vp2->v_name);
- vfree(vp2->v_value);
- cfree((char *)vp2);
- continue;
- }
- for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link)
- ;
- vp->v_link = vp2->v_link;
- vfree(vp2->v_name);
- vfree(vp2->v_value);
- cfree((char *) vp2);
- }
- return(errs);
- }
-
- /*
- * Put add users to a group.
- */
-
- group(argv)
- char **argv;
- {
- register struct grouphead *gh;
- register struct group *gp;
- register int h;
- int s;
- char **ap, *gname, **p;
-
- if (argcount(argv) == 0) {
- 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 (argcount(argv) == 1) {
- 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.
- */
-
- sort(list)
- char **list;
- {
- register char **ap;
- int diction();
-
- for (ap = list; *ap != NOSTR; ap++)
- ;
- if (ap-list < 2)
- return;
- qsort((char *)list, ap-list, sizeof *list, diction);
- }
-
- /*
- * Do a dictionary order comparison of the arguments from
- * qsort.
- */
-
- diction(a, b)
- register char **a, **b;
- {
- return(strcmp(*a, *b));
- }
-
- /*
- * The do nothing command for comments.
- */
-
- /*ARGSUSED*/
- null(e)
- {
- return 0;
- }
-
- /*
- * Print out the current edit file, if we are editing.
- * Otherwise, print the name of the person who's mail
- * we are reading.
- */
-
- file(argv)
- char **argv;
- {
- register char *cp;
- int edit;
-
- if (argv[0] == NOSTR) {
- newfileinfo();
- return(0);
- }
-
- /*
- * Acker's! Must switch to the new file.
- * We use a funny interpretation --
- * # -- gets the previous file
- * % -- gets the invoker's post office box
- * %user -- gets someone else's post office box
- * & -- gets invoker's mbox file
- * string -- reads the given file
- */
-
- cp = getfilename(argv[0], &edit);
- if (cp == NOSTR)
- return(-1);
- if (setfile(cp, edit)) {
- perror(cp);
- return(-1);
- }
- announce(0);
- return 0;
- }
-
- /*
- * Evaluate the string given as a new mailbox name.
- * Ultimately, we want this to support a number of meta characters.
- * Possibly:
- * % -- for my system mail box
- * %user -- for user's system mail box
- * # -- for previous file
- * & -- get's invoker's mbox file
- * file name -- for any other file
- */
-
- char prevfile[PATHSIZE];
-
- char *
- getfilename(name, aedit)
- char *name;
- int *aedit;
- {
- register char *cp;
- char savename[BUFSIZ];
- char oldmailname[BUFSIZ];
-
- /*
- * Assume we will be in "edit file" mode, until
- * proven wrong.
- */
- *aedit = 1;
- switch (*name) {
- case '%':
- *aedit = 0;
- strcpy(prevfile, mailname);
- if (name[1] != 0) {
- strcpy(savename, myname);
- strcpy(oldmailname, mailname);
- strncpy(myname, name+1, PATHSIZE-1);
- myname[PATHSIZE-1] = 0;
- findmail();
- cp = savestr(mailname);
- strcpy(myname, savename);
- strcpy(mailname, oldmailname);
- return(cp);
- }
- strcpy(oldmailname, mailname);
- findmail();
- cp = savestr(mailname);
- strcpy(mailname, oldmailname);
- return(cp);
-
- case '#':
- if (name[1] != 0)
- goto regular;
- if (prevfile[0] == 0) {
- printf("No previous file\n");
- return(NOSTR);
- }
- cp = savestr(prevfile);
- strcpy(prevfile, mailname);
- return(cp);
-
- case '&':
- strcpy(prevfile, mailname);
- if (name[1] == 0)
- return(mbox);
- /* Fall into . . . */
-
- default:
- regular:
- strcpy(prevfile, mailname);
- cp = expand(name);
- return(cp);
- }
- }
-
- /*
- * Expand file names like echo
- */
-
- echo(argv)
- char **argv;
- {
- register char **ap;
- register char *cp;
-
- for (ap = argv; *ap != NOSTR; ap++) {
- cp = *ap;
- if ((cp = expand(cp)) != NOSTR)
- printf("%s ", cp);
- }
- return(0);
- }
-
- 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.
- */
-
- _Respond(msgvec)
- int msgvec[];
- {
- struct header head;
- struct message *mp;
- register int s, *ap;
- register char *cp, *cp2, *subject;
-
- for (s = 0, ap = msgvec; *ap != 0; ap++) {
- mp = &message[*ap - 1];
- dot = mp;
- if ((cp = skin(hfield("from", mp))) != NOSTR)
- s+= strlen(cp) + 1;
- else
- s += strlen(skin(nameof(mp, 2))) + 1;
- }
- if (s == 0)
- return(0);
- cp = salloc(s + 2);
- head.h_to = cp;
- for (ap = msgvec; *ap != 0; ap++) {
- mp = &message[*ap - 1];
- if ((cp2 = skin(hfield("from", mp))) == NOSTR)
- cp2 = skin(nameof(mp, 2));
- cp = copy(cp2, cp);
- *cp++ = ' ';
- }
- *--cp = 0;
- mp = &message[msgvec[0] - 1];
- subject = hfield("subject", mp);
- head.h_seq = 0;
- if (subject == NOSTR)
- subject = hfield("subj", mp);
- head.h_subject = reedit(subject);
- if (subject != NOSTR)
- head.h_seq++;
- head.h_cc = NOSTR;
- head.h_bcc = NOSTR;
- mail1(&head);
- return(0);
- }
-
- /*
- * Conditional commands. These allow one to parameterize one's
- * .mailrc and do some things if sending, others if receiving.
- */
-
- 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;
-
- case 't':
- if (isatty(0))
- cond = rcvmode ? CRCV : CSEND;
- else
- cond = rcvmode ? CSEND : CRCV;
- 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.
- */
-
- 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.
- */
-
- endifcmd()
- {
-
- if (cond == CANY) {
- printf("\"Endif\" without matching \"if\"\n");
- return(1);
- }
- cond = CANY;
- return(0);
- }
-
- /*
- * Set the list of alternate names.
- */
- 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)
- cfree((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);
- }
-