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Arquivotheca.Solaris-2.5/cmd/mailx/cmd3.c
seta75D 7c4988eac0 Init
2021-10-11 19:38:01 -03:00

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/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)cmd3.c 1.27 95/07/19 SMI" /* from SVr4.0 1.11.4.2 */
#include "rcv.h"
#include <locale.h>
/*
* mailx -- a modified version of a University of California at Berkeley
* mail program
*
* Still more user commands.
*/
static int bangexp(char *str);
static int diction(const void *a, const void *b);
static char *getfilename(char *name, int *aedit);
static int resp1(int *msgvec, int useauthor);
static int Resp1(int *msgvec, int useauthor);
static char *reedit(char *subj);
static int shell1(char *str);
static void sort(char **list);
static char *replyto(struct message *mp, char **f);
static int reply2sender(void);
static char prevfile[PATHSIZE];
static char origprevfile[PATHSIZE];
static char lastbang[256];
/*
* Process a shell escape by saving signals, ignoring signals,
* and forking a sh -c
*/
int
shell(char *str)
{
shell1(str);
printf("!\n");
return(0);
}
static int
shell1(char *str)
{
void (*sig[2])(int);
register int t;
register pid_t p;
char *Shell;
char cmd[BUFSIZ];
strcpy(cmd, str);
if (bangexp(cmd) < 0)
return(-1);
if ((Shell = value("SHELL")) == NOSTR || *Shell=='\0')
Shell = SHELL;
for (t = SIGINT; t <= SIGQUIT; t++)
sig[t-SIGINT] = sigset(t, SIG_IGN);
p = vfork();
if (p == 0) {
setuid(getuid());
sigchild();
for (t = SIGINT; t <= SIGQUIT; t++)
if (sig[t-SIGINT] != SIG_IGN)
sigsys(t, SIG_DFL);
execlp(Shell, Shell, "-c", cmd, (char *)0);
perror(Shell);
_exit(1);
}
while (wait(0) != p)
;
if (p == (pid_t)-1)
perror("fork");
for (t = SIGINT; t <= SIGQUIT; t++)
sigset(t, sig[t-SIGINT]);
return(0);
}
/*
* Fork an interactive shell.
*/
int
#ifdef __cplusplus
dosh(char *)
#else
/* ARGSUSED */
dosh(char *s)
#endif
{
void (*sig[2])(int);
register int t;
register pid_t p;
char *Shell;
if ((Shell = value("SHELL")) == NOSTR || *Shell=='\0')
Shell = SHELL;
for (t = SIGINT; t <= SIGQUIT; t++)
sig[t-SIGINT] = sigset(t, SIG_IGN);
p = vfork();
if (p == 0) {
setuid(getuid());
sigchild();
for (t = SIGINT; t <= SIGQUIT; t++)
if (sig[t-SIGINT] != SIG_IGN)
sigset(t, SIG_DFL);
execlp(Shell, Shell, (char *)0);
perror(Shell);
_exit(1);
}
while (wait(0) != p)
;
if (p == (pid_t)-1)
perror("fork");
for (t = SIGINT; t <= SIGQUIT; t++)
sigset(t, sig[t-SIGINT]);
putchar('\n');
return(0);
}
/*
* Expand the shell escape by expanding unescaped !'s into the
* last issued command where possible.
*/
static int
bangexp(char *str)
{
char bangbuf[BUFSIZ];
register char *cp, *cp2;
register int n;
int changed = 0;
int bangit = (value("bang")!=NOSTR);
cp = str;
cp2 = bangbuf;
n = BUFSIZ;
while (*cp) {
if (*cp=='!' && bangit) {
if (n < (int)strlen(lastbang)) {
overf:
printf(gettext("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, sizeof lastbang);
lastbang[(sizeof lastbang)-1] = 0;
return(0);
}
/*
* Print out a nice help message from some file or another.
*/
int
help(void)
{
register c;
register FILE *f;
if ((f = fopen(HELPFILE, "r")) == NULL) {
printf(gettext("No help just now.\n"));
return(1);
}
while ((c = getc(f)) != EOF)
putchar(c);
fclose(f);
return(0);
}
/*
* Change user's working directory.
*/
int
schdir(char *str)
{
register char *cp;
char cwd[PATHSIZE], file[PATHSIZE];
static char efile[PATHSIZE];
for (cp = str; *cp == ' '; cp++)
;
if (*cp == '\0')
cp = homedir;
else
if ((cp = expand(cp)) == NOSTR)
return(1);
if (editfile != NOSTR && (*editfile != '/' || mailname[0] != '/')) {
if (getcwd(cwd, (int)sizeof (cwd)) == 0) {
fprintf(stderr,
gettext("Can't get current directory: %s\n"), cwd);
return(1);
}
}
if (chdir(cp) < 0) {
perror(cp);
return(1);
}
/*
* Convert previously relative names to absolute names.
*/
if (editfile != NOSTR && *editfile != '/') {
sprintf(file, "%s/%s", cwd, editfile);
strcpy(efile, file);
editfile = efile;
}
if (mailname[0] != '/') {
sprintf(file, "%s/%s", cwd, mailname);
strcpy(mailname, file);
}
return(0);
}
/*
* Two versions of reply. Reply to all names in message or reply
* to only sender of message, depending on setting of "replyall".
*/
int
respond(int *msgvec)
{
if (reply2sender())
return(resp1(msgvec, 0));
else
return(Resp1(msgvec, 0));
}
int
followup(int *msgvec)
{
if (reply2sender())
return(resp1(msgvec, 1));
else
return(Resp1(msgvec, 1));
}
int
replyall(int *msgvec)
{
return(resp1(msgvec, 0));
}
static int
resp1(int *msgvec, int useauthor)
{
struct message *mp;
char *cp, *buf, *rcv, *skin_rcv, *reply2, **ap;
struct name *np;
struct header head;
char mylocalname[BUFSIZ], mydomname[BUFSIZ];
if (msgvec[1] != 0) {
printf(gettext(
"Sorry, can't reply to multiple messages at once\n"));
return(1);
}
strcpy(mylocalname, myname);
strcat(mylocalname, "@");
strcpy(mydomname, mylocalname);
strcat(mylocalname, host);
strcat(mydomname, domain);
mp = &message[msgvec[0] - 1];
dot = mp;
reply2 = replyto(mp, &rcv);
cp = skin(hfield("to", mp, addto));
if (cp != NOSTR) {
buf = (char *)salloc(strlen(reply2) + strlen(cp) + 2);
strcpy(buf, reply2);
strcat(buf, " ");
strcat(buf, cp);
} else
buf = reply2;
np = elide(extract(buf, GTO));
#ifdef OPTIM
/* rcv = netrename(rcv); */
#endif /* OPTIM */
/*
* Delete my name from the reply list,
* and with it, all my alternate names.
*/
skin_rcv = skin(rcv);
mapf(np, skin_rcv);
np = delname(np, myname);
np = delname(np, mylocalname);
np = delname(np, mydomname);
if (altnames != 0)
for (ap = altnames; *ap; ap++)
np = delname(np, *ap);
head.h_seq = 1;
cp = detract(np, 0);
if (cp == NOSTR) {
if (reply2)
cp = unuucp(reply2);
else
cp = unuucp(rcv);
}
head.h_to = cp;
head.h_subject = hfield("subject", mp, addone);
if (head.h_subject == NOSTR)
head.h_subject = hfield("subj", mp, addone);
head.h_subject = reedit(head.h_subject);
head.h_cc = NOSTR;
cp = skin(hfield("cc", mp, addto));
if (cp != NOSTR) {
np = elide(extract(cp, GCC));
mapf(np, skin_rcv);
np = delname(np, myname);
np = delname(np, mylocalname);
np = delname(np, mydomname);
np = delname(np, skin_rcv);
if (altnames != 0)
for (ap = altnames; *ap; ap++)
np = delname(np, *ap);
head.h_cc = detract(np, 0);
}
head.h_bcc = NOSTR;
head.h_defopt = NOSTR;
head.h_others = NOSTRPTR;
mail1(&head, useauthor, useauthor ? rcv : NOSTR);
return(0);
}
void
getrecf(char *buf, char *recfile, int useauthor)
{
register char *bp, *cp;
register char *recf = recfile;
register int folderize;
char fldr[BUFSIZ];
folderize = (value("outfolder")!=NOSTR && getfold(fldr) == 0);
if (useauthor) {
if (folderize)
*recf++ = '+';
if (debug) fprintf(stderr, "buf='%s'\n", buf);
for (bp=skin(buf), cp=recf; *bp && !any(*bp, ", "); bp++)
if (*bp=='!')
cp = recf;
else
*cp++ = *bp;
*cp = '\0';
if (cp==recf)
*recfile = '\0';
/* now strip off any Internet host names */
if ((cp = strchr(recf, '%')) == NOSTR)
cp = strchr(recf, '@');
if (cp != NOSTR)
*cp = '\0';
} else {
if (cp = value("record")) {
if (folderize && *cp!='+' && *cp!='/'
&& *safeexpand(cp)!='/')
*recf++ = '+';
strcpy(recf, cp);
} else
*recf = '\0';
}
if (debug) fprintf(stderr, "recfile='%s'\n", recfile);
}
/*
* Modify the subject we are replying to to begin with Re: if
* it does not already.
*/
static char *
reedit(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 = (char *)salloc((unsigned)(strlen(subj) + 5));
sprintf(newsubj, "Re: %s", subj);
return(newsubj);
}
/*
* Preserve the named messages, so that they will be sent
* back to the system mailbox.
*/
int
preserve(int *msgvec)
{
register struct message *mp;
register int *ip, mesg;
if (edit) {
printf(gettext("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.
*/
int
unread(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.
*/
int
messize(int *msgvec)
{
register struct message *mp;
register int *ip, mesg;
for (ip = msgvec; *ip != NULL; ip++) {
mesg = *ip;
mp = &message[mesg-1];
dot = mp;
printf("%d: %ld\n", mesg, mp->m_size);
}
return(0);
}
/*
* Quit quickly. If we are sourcing, just pop the input level
* by returning an error.
*/
int
rexit(int e)
{
if (sourcing)
return(1);
if (Tflag != NOSTR)
close(creat(Tflag, TEMPPERM));
if (!edit)
Verhogen();
exit(e);
/* NOTREACHED */
return (0); /* shut up lint and CC */
}
/*
* Set or display a variable value. Syntax is similar to that
* of csh.
*/
int
set(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++)
if (((cp = value(*p)) != 0) && *cp)
printf("%s=\"%s\"\n", *p, cp);
else
printf("%s\n", *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(gettext("Non-null variable name required\n"));
errs++;
continue;
}
assign(varbuf, cp);
}
return(errs);
}
/*
* Unset a bunch of variable values.
*/
int
unset(char **arglist)
{
register int errs;
register char **ap;
errs = 0;
for (ap = arglist; *ap != NOSTR; ap++)
errs += deassign(*ap);
return(errs);
}
/*
* Add users to a group.
*/
int
group(char **argv)
{
register struct grouphead *gh;
register struct mgroup *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 mgroup *) calloc(sizeof *gp, 1);
gp->ge_name = vcopy(*ap);
gp->ge_link = gh->g_list;
gh->g_list = gp;
}
return(0);
}
/*
* Remove users from a group.
*/
int
ungroup(char **argv)
{
register struct grouphead *gh, **ghp;
register struct mgroup *gp, *gpnext;
register int h;
char **ap, *gname;
if (argcount(argv) == 0) {
printf("Must specify alias or group to remove\n");
return(1);
}
/*
* Remove names on the command list from the group list.
*/
for (ap = argv; *ap != NOSTR; ap++) {
gname = *ap;
h = hash(gname);
for (ghp = &groups[h]; *ghp != NOGRP; ghp = &((*ghp)->g_link)) {
gh = *ghp;
if (equal(gh->g_name, gname)) {
/* remove from list */
*ghp = gh->g_link;
/* free each member of gorup */
for (gp = gh->g_list; gp != NOGE; gp = gpnext) {
gpnext = gp->ge_link;
vfree(gp->ge_name);
free(gp);
}
vfree(gh->g_name);
free(gh);
break;
}
}
}
return(0);
}
/*
* Sort the passed string vecotor into ascending dictionary
* order.
*/
static void
sort(char **list)
{
register char **ap;
for (ap = list; *ap != NOSTR; ap++)
;
if (ap-list < 2)
return;
qsort((char *) list, (unsigned) (ap-list), sizeof *list, diction);
}
/*
* Do a dictionary order comparison of the arguments from
* qsort.
*/
static int
diction(const void *a, const void *b)
{
return(strcmp(*(char **)a, *(char **)b));
}
/*
* The do nothing command for comments.
*/
int
#ifdef __cplusplus
null(char *)
#else
/* ARGSUSED */
null(char *s)
#endif
{
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.
*/
int
file(char **argv)
{
register char *cp;
int editing, mdot;
if (argv[0] == NOSTR) {
mdot = newfileinfo(1);
dot = &message[mdot - 1];
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], &editing);
if (cp == NOSTR)
return(-1);
if (setfile(cp, editing)) {
strcpy(origname, origprevfile);
return(-1);
}
mdot = newfileinfo(1);
dot = &message[mdot - 1];
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
*/
static char *
getfilename(char *name, int *aedit)
{
register char *cp;
char savename[BUFSIZ];
char oldmailname[BUFSIZ];
char tmp[BUFSIZ];
/*
* Assume we will be in "edit file" mode, until
* proven wrong.
*/
*aedit = 1;
switch (*name) {
case '%':
*aedit = 0;
strcpy(prevfile, editfile);
strcpy(origprevfile, origname);
if (name[1] != 0) {
strcpy(oldmailname, mailname);
findmail(name+1);
cp = savestr(mailname);
strcpy(origname, cp);
strcpy(mailname, oldmailname);
return(cp);
}
strcpy(oldmailname, mailname);
findmail(NULL);
cp = savestr(mailname);
strcpy(mailname, oldmailname);
strcpy(origname, cp);
return(cp);
case '#':
if (name[1] != 0)
goto regular;
if (prevfile[0] == 0) {
printf(gettext("No previous file\n"));
return(NOSTR);
}
cp = savestr(prevfile);
strcpy(prevfile, editfile);
strcpy(tmp, origname);
strcpy(origname, origprevfile);
strcpy(origprevfile, tmp);
return(cp);
case '&':
strcpy(prevfile, editfile);
strcpy(origprevfile, origname);
if (name[1] == 0) {
cp=Getf("MBOX");
strcpy(origname, cp);
return(cp);
}
/* Fall into . . . */
default:
regular:
strcpy(prevfile, editfile);
strcpy(origprevfile, origname);
cp = safeexpand(name);
strcpy(origname, cp);
if (cp[0] != '/') {
name = getcwd(NOSTR, PATHSIZE);
strcat(name, "/");
strcat(name, cp);
cp = name;
}
return(cp);
}
}
/*
* Expand file names like echo
*/
int
echo(register char **argv)
{
register char *cp;
int neednl = 0;
while (*argv != NOSTR) {
cp = *argv++;
if ((cp = expand(cp)) != NOSTR) {
neednl++;
printf("%s", cp);
if (*argv!=NOSTR)
putchar(' ');
}
}
if (neednl)
putchar('\n');
return(0);
}
/*
* 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(int *msgvec)
{
if (reply2sender())
return(Resp1(msgvec, 0));
else
return(resp1(msgvec, 0));
}
int
Followup(int *msgvec)
{
if (reply2sender())
return(Resp1(msgvec, 1));
else
return(resp1(msgvec, 1));
}
int
replysender(int *msgvec)
{
return(Resp1(msgvec, 0));
}
static int
Resp1(int *msgvec, int useauthor)
{
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;
cp = replyto(mp, NOSTRPTR);
s += strlen(cp) + 1;
}
if (s == 0)
return(0);
cp = (char *)salloc(s + 2);
head.h_to = cp;
for (ap = msgvec; *ap != 0; ap++) {
mp = &message[*ap - 1];
cp2 = replyto(mp, NOSTRPTR);
cp = copy(cp2, cp);
*cp++ = ' ';
}
*--cp = 0;
mp = &message[msgvec[0] - 1];
subject = hfield("subject", mp, addone);
head.h_seq = 1;
if (subject == NOSTR)
subject = hfield("subj", mp, addone);
head.h_subject = reedit(subject);
if (subject != NOSTR)
head.h_seq++;
head.h_cc = NOSTR;
head.h_bcc = NOSTR;
head.h_defopt = NOSTR;
head.h_others = NOSTRPTR;
mail1(&head, useauthor, NOSTR);
return(0);
}
/*
* Conditional commands. These allow one to parameterize one's
* .mailrc and do some things if sending, others if receiving.
*/
int
ifcmd(char **argv)
{
register char *cp;
if (cond != CANY) {
printf(gettext("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': case 'T':
cond = CTTY;
break;
default:
printf(gettext("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(void)
{
switch (cond) {
case CANY:
printf(gettext("\"Else\" without matching \"if\"\n"));
return(1);
case CSEND:
cond = CRCV;
break;
case CRCV:
cond = CSEND;
break;
case CTTY:
cond = CNOTTY;
break;
case CNOTTY:
cond = CTTY;
break;
default:
printf(gettext("invalid condition encountered\n"));
cond = CANY;
break;
}
return(0);
}
/*
* End of if statement. Just set cond back to anything.
*/
int
endifcmd(void)
{
if (cond == CANY) {
printf(gettext("\"Endif\" without matching \"if\"\n"));
return(1);
}
cond = CANY;
return(0);
}
/*
* Set the list of alternate names.
*/
int
alternates(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);
}
/*
* Figure out who to reply to.
* Return the real sender in *f.
*/
static char *
replyto(struct message *mp, char **f)
{
char *r, *rf;
if ((rf = skin(hfield("from", mp, addto)))==NOSTR)
rf = skin(addto(NOSTR, nameof(mp)));
if ((r = skin(hfield("reply-to", mp, addto)))==NOSTR)
r = rf;
if (f)
*f = rf;
return (r);
}
/*
* reply2sender - determine whether a "reply" command should reply to the
* sender of the messages, or to all the recipients of the
* message.
*
* With the advent of POSIX.2 compliance, this has become
* a bit more complicated, and so should be done in one
* place, for all to use.
*/
static int
reply2sender (void)
{
register int rep = (value("replyall") != NOSTR);
register int flp = (value("flipr") != NOSTR);
return((rep && !flp)|| (!rep && flp));
}
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