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irix-657m-src/eoe/cmd/Mail/names.c
2022-09-29 17:59:04 +03:00

904 lines
16 KiB
C

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char *sccsid = "@(#)names.c 5.2 (Berkeley) 6/21/85";
#endif /* !lint */
/*
* Mail -- a mail program
*
* Handle name lists.
*/
#include "glob.h"
#include <ctype.h>
/*
* Allocate a single element of a name list,
* initialize its name field to the passed
* name and return it.
*/
struct name *
nalloc(str)
char str[];
{
register struct name *np;
np = (struct name *) salloc(sizeof *np);
np->n_flink = NIL;
np->n_blink = NIL;
np->n_type = -1;
np->n_name = savestr(str);
return(np);
}
/*
* Find the tail of a list and return it.
*/
struct name *
tailof(name)
struct name *name;
{
register struct name *np;
np = name;
if (np == NIL)
return(NIL);
while (np->n_flink != NIL)
np = np->n_flink;
return(np);
}
/*
* Extract a list of names from a line,
* and make a list of names from it.
* Return the list or NIL if none found.
*/
struct name *
extract(line, ntype)
char line[];
{
register char *cp;
register struct name *top, *np, *t;
char nbuf[BUFSIZ], abuf[BUFSIZ];
if (line == NOSTR || strlen(line) == 0)
return(NIL);
top = NIL;
np = NIL;
cp = line;
while ((cp = yankword(cp, nbuf)) != NOSTR) {
if (np != NIL && equal(nbuf, "at")) {
strncpy(abuf, nbuf, BUFSIZ);
abuf[BUFSIZ - 1] = '\0';
if ((cp = yankword(cp, nbuf)) == NOSTR) {
strncpy(nbuf, abuf, BUFSIZ);
nbuf[BUFSIZ - 1] = '\0';
goto normal;
}
strncpy(abuf, np->n_name, BUFSIZ);
abuf[BUFSIZ - 1] = '\0';
if(strlen(abuf) < (BUFSIZ - 1))
strcat(abuf, "@");
strncat(abuf, nbuf, BUFSIZ);
abuf[BUFSIZ - 1] = '\0';
np->n_name = savestr(abuf);
continue;
}
normal:
t = nalloc(nbuf);
t->n_type = ntype;
if (top == NIL)
top = t;
else
np->n_flink = t;
t->n_blink = np;
np = t;
}
return(top);
}
/*
* Turn a list of names into a string of the same names.
*/
char *
detract(np, ntype)
register struct name *np;
{
register int s;
register char *cp, *top;
register struct name *p;
register int comma;
/*
* comma = ntype & GCOMMA;
*/
comma = 1;
if (np == NIL)
return(NOSTR);
ntype &= ~GCOMMA;
s = 0;
if (debug && comma)
fprintf(stderr, "detract asked to insert commas\n");
for (p = np; p != NIL; p = p->n_flink) {
if (ntype && (p->n_type & GMASK) != ntype)
continue;
s += strlen(p->n_name) + 1;
if (comma)
s++;
}
if (s == 0)
return(NOSTR);
s += 2;
top = salloc(s);
cp = top;
for (p = np; p != NIL; p = p->n_flink) {
if (ntype && (p->n_type & GMASK) != ntype)
continue;
cp = copy(p->n_name, cp, (top + s) - cp);
if (comma && p->n_flink != NIL)
if((cp + 1) < (top + s - 1))
*cp++ = ',';
if((cp + 1) < (top + s - 1))
*cp++ = ' ';
}
*--cp = 0;
if (comma && *--cp == ',')
*cp = 0;
return(top);
}
/*
* Grab a single word (liberal word, address actually)
* Ignore things between ()'s.
*/
char *
yankword(ap, wbuf)
char *ap, wbuf[];
{
register char *cp, *cp2, *cp3;
register int nestlevel;
cp = ap;
/*
* Strip leading garbage
*/
while (isspace(*cp) || *cp == ',')
cp++;
if (*cp == '\0')
return(NOSTR);
/*
* Scan ahead and see if there's a "<route-addr>"
* or comma further down the line. If so, the first
* one we encounter deliniates the end of the current
* address field.
*/
cp3 = cp;
while (*cp3 != '\0' && *cp3 != '<' && *cp3 != ',') {
if (*cp3 == '(')
while (*cp3 != '\0' && *cp3++ != ')')
;
else if (*cp3 == '\"') {
cp3++;
while (*cp3 != '\0' && *cp3++ != '\"')
;
}
else
cp3++;
}
if (*cp3 == ',')
cp3--;
else if (*cp3 == '<') {
/*
* Allow nesting, sendmail seems to!
*/
nestlevel = 1;
while (*++cp3 != '\0') {
if (*cp3 == '<')
nestlevel++;
else if (*cp3 == '>' && --nestlevel <= 0)
break;
}
}
else if (*cp3 == '\0') {
/*
* O.K. What we got here is some nasty arbitrary
* string. Send it on to the parser.
*/
cp3 = getaddr(cp);
/*
* Strip any trailing spaces.
*/
while(isspace(*cp3))
cp3--;
}
/*
* cp now points to the first character of the complete address
* field, cp3 points to the last.
*
* Copy the address into wbuf.
*/
if (*cp == '\0')
return(NOSTR);
for (cp2 = wbuf; (cp <= cp3 && *cp != '\0') ; *cp2++ = *cp++)
;
*cp2 = '\0';
return(cp);
}
/* state definitions */
#define LWSP 0
#define LCOM 1
#define QUOT 2
#define WSP 3
#define COM1 4
#define COM2 5
#define COM3 6
#define SPEC 7
#define WORD 8
#define DONE -1
/* input definitions */
#define ENDL 0
#define SPACE 1
#define SPCHR 2
#define OPEREN 3
#define CPEREN 4
#define QUOTE 5
#define OTHER 6
static short parsetab[9][7] = {
/* ENDL, SPACE, SPCHR, OPEREN, CPEREN, QUOTE, OTHER */
/*LWSP*/{ DONE, LWSP, SPEC, LCOM, LWSP, QUOT, WORD },
/*LCOM*/{ DONE, LCOM, LCOM, LCOM, LCOM, LCOM, LCOM },
/*QUOT*/{ DONE, QUOT, QUOT, QUOT, QUOT, WSP, QUOT },
/* WSP*/{ DONE, WSP, SPEC, COM1, DONE, QUOT, DONE },
/*COM1*/{ DONE, COM1, COM1, COM1, COM1, COM1, COM1 },
/*COM2*/{ DONE, COM2, COM2, COM2, COM2, COM2, COM2 },
/*COM3*/{ DONE, COM3, COM3, COM3, COM3, COM3, COM3 },
/*SPEC*/{ DONE, SPEC, SPEC, COM3, WORD, QUOT, WORD },
/*WORD*/{ DONE, WSP, SPEC, COM2, WORD, QUOT, WORD }
};
char *
getaddr(cp1)
char *cp1;
{
register int curstate, curinput, nextstate, nestlevel;
char *cp;
cp = cp1;
curstate = LWSP;
nestlevel = 0;
curinput = convert(*cp);
while ((nextstate = parsetab[curstate][curinput]) != DONE) {
/*
* Some states require special processing.
*/
switch(nextstate) {
case LCOM:
if (curinput == CPEREN && --nestlevel <= 0) {
nextstate = LWSP;
nestlevel = 0;
}
else if (curinput == OPEREN)
nestlevel++;
break;
case COM1:
if (curinput == CPEREN && --nestlevel <= 0) {
nextstate = WSP;
nestlevel = 0;
}
else if (curinput == OPEREN)
nestlevel++;
break;
case COM2:
if (curinput == CPEREN && --nestlevel <= 0) {
nextstate = WORD;
nestlevel = 0;
}
else if (curinput == OPEREN)
nestlevel++;
break;
case COM3:
if (curinput == CPEREN && --nestlevel <= 0) {
nextstate = SPEC;
nestlevel = 0;
}
else if (curinput == OPEREN)
nestlevel++;
break;
}
curstate = nextstate;
curinput = convert(*++cp);
}
return(--cp);
}
convert(chr)
char chr;
{
if (isspace(chr))
return(SPACE);
else if (chr == '\0')
return(ENDL);
else if (chr == '.' || chr == '@')
return(SPCHR);
else if (chr == '(')
return(OPEREN);
else if (chr == ')')
return(CPEREN);
else if (chr == '\"')
return(QUOTE);
else
return(OTHER);
}
tidyaddr(cp1, cp2)
char *cp1, *cp2;
{
register int inquote, nestlevel;
char *cp;
cp = cp2;
inquote = nestlevel = 0;
while(*cp1 != '\0') {
if (*cp1 == '\"') {
if (inquote)
inquote = 0;
else
inquote++;
}
if (*cp1 == '(') {
nestlevel = 1;
while(*++cp1 != '\0') {
if (*cp1 == '(')
nestlevel++;
else if (*cp1 == ')' && --nestlevel <= 0) {
cp1++;
break;
}
}
continue;
}
if (isspace(*cp1) && !inquote) {
cp1++;
continue;
}
if (*cp1 == '<') {
nestlevel = 1;
cp = cp2;
do {
*cp++ = *cp1++;
if (*cp1 == '<')
nestlevel++;
else if (*cp1 == '>' && --nestlevel <= 0) {
*cp++ = *cp1++;
break;
}
} while(*cp1 != '\0');
break;
}
*cp++ = *cp1++;
}
*cp = '\0';
return;
}
/*
* Verify that all the users in the list of names are
* legitimate. Bitch about and delink those who aren't.
*/
struct name *
verify(names)
struct name *names;
{
register struct name *np, *top, *t, *x;
register char *cp;
#ifdef SENDMAIL
return(names);
#else
top = names;
np = names;
while (np != NIL) {
if (np->n_type & GDEL) {
np = np->n_flink;
continue;
}
for (cp = "!:@^"; *cp; cp++)
if (any(*cp, np->n_name))
break;
if (*cp != 0) {
np = np->n_flink;
continue;
}
cp = np->n_name;
while (*cp == '\\')
cp++;
if (equal(cp, "msgs") ||
getuserid(cp) != -1) {
np = np->n_flink;
continue;
}
fprintf(stderr, "Can't send to %s\n", np->n_name);
senderr++;
if (np == top) {
top = np->n_flink;
if (top != NIL)
top->n_blink = NIL;
np = top;
continue;
}
x = np->n_blink;
t = np->n_flink;
x->n_flink = t;
if (t != NIL)
t->n_blink = x;
np = t;
}
return(top);
#endif
}
/*
* For each recipient in the passed name list with a /
* in the name, append the message to the end of the named file
* and remove him from the recipient list.
*
* Recipients whose name begins with | are piped through the given
* program and removed.
*/
struct name *
outof(names, fo, hp)
struct name *names;
FILE *fo;
struct header *hp;
{
register int c;
register struct name *np, *top, *t, *x;
long now;
char *date, *fname, *shell, *ctime();
FILE *fout, *fin;
int ispipe, s, pid;
extern char tempEdit[];
top = names;
np = names;
time(&now);
date = ctime(&now);
while (np != NIL) {
if (!isfileaddr(np->n_name) && np->n_name[0] != '|') {
np = np->n_flink;
continue;
}
ispipe = np->n_name[0] == '|';
if (ispipe)
fname = np->n_name+1;
else
fname = expand(np->n_name);
/*
* See if we have copied the complete message out yet.
* If not, do so.
*/
if (image < 0) {
if ((fout = fopen(tempEdit, "a")) == NULL) {
perror(tempEdit);
senderr++;
goto cant;
}
image = open(tempEdit, 2);
unlink(tempEdit);
if (image < 0) {
perror(tempEdit);
senderr++;
goto cant;
}
else {
rewind(fo);
fprintf(fout, "From %s %s", myname, date);
puthead(hp, fout, (GALLHDR|GNL) & ~GBCC);
while ((c = getc(fo)) != EOF)
putc(c, fout);
rewind(fo);
putc('\n', fout);
fflush(fout);
if (ferror(fout))
perror(tempEdit);
fclose(fout);
}
}
/*
* Now either copy "image" to the desired file
* or give it as the standard input to the desired
* program as appropriate.
*/
if (ispipe) {
wait(&s);
switch (pid = fork()) {
case 0:
sigchild();
sigsys(SIGHUP, SIG_IGN);
sigsys(SIGINT, SIG_IGN);
sigsys(SIGQUIT, SIG_IGN);
close(0);
dup(image);
close(image);
if ((shell = value("SHELL")) == NOSTR)
shell = SHELL;
execl(shell, shell, "-c", fname, 0);
perror(shell);
safe_exit(1);
break;
case -1:
perror("fork");
senderr++;
goto cant;
}
}
else {
if ((fout = fopen(fname, "a")) == NULL) {
perror(fname);
senderr++;
goto cant;
}
fin = Fdopen(image, "r");
if (fin == NULL) {
fprintf(stderr, "Can't reopen image\n");
fclose(fout);
senderr++;
goto cant;
}
rewind(fin);
while ((c = getc(fin)) != EOF)
putc(c, fout);
if (ferror(fout))
senderr++, perror(fname);
fclose(fout);
fclose(fin);
}
cant:
/*
* In days of old we removed the entry from the
* the list; now for sake of header expansion
* we leave it in and mark it as deleted.
*/
#ifdef CRAZYWOW
if (np == top) {
top = np->n_flink;
if (top != NIL)
top->n_blink = NIL;
np = top;
continue;
}
x = np->n_blink;
t = np->n_flink;
x->n_flink = t;
if (t != NIL)
t->n_blink = x;
np = t;
#endif
np->n_type |= GDEL;
np = np->n_flink;
}
if (image >= 0) {
close(image);
image = -1;
}
return(top);
}
#define METANET "!^:%@"
/*
* Determine if the passed address is a local "send to file" address.
* If any of the network metacharacters precedes any slashes, it can't
* be a filename.
*/
isfileaddr(name)
char *name;
{
register char *cp;
if (any('@', name))
return(0);
if (*name == '+')
return(1);
for (cp = name; *cp; cp++) {
if (any(*cp, METANET))
return(0);
if (*cp == '/')
return(1);
}
return(0);
}
/*
* Map all of the aliased users in the invoker's mailrc
* file and insert them into the list.
* Changed after all these months of service to recursively
* expand names (2/14/80).
*/
struct name *
usermap(names)
struct name *names;
{
register struct name *new, *np, *cp;
struct name *getto;
struct grouphead *gh;
register int metoo;
new = NIL;
np = names;
getto = NIL;
metoo = (value("metoo") != NOSTR);
while (np != NIL) {
if (np->n_name[0] == '\\') {
cp = np->n_flink;
new = put(new, np);
np = cp;
continue;
}
gh = findgroup(np->n_name);
cp = np->n_flink;
if (gh != NOGRP)
new = gexpand(new, gh, metoo, np->n_type);
else
new = put(new, np);
np = cp;
}
return(new);
}
/*
* Recursively expand a group name. We limit the expansion to some
* fixed level to keep things from going haywire.
* Direct recursion is not expanded for convenience.
*/
struct name *
gexpand(nlist, gh, metoo, ntype)
struct name *nlist;
struct grouphead *gh;
{
struct group *gp;
struct grouphead *ngh;
struct name *np;
static int depth;
char *cp;
if (depth > MAXEXP) {
printf("Expanding alias to depth larger than %d\n", MAXEXP);
return(nlist);
}
depth++;
for (gp = gh->g_list; gp != NOGE; gp = gp->ge_link) {
cp = gp->ge_name;
if (*cp == '\\')
goto quote;
if (strcmp(cp, gh->g_name) == 0)
goto quote;
if ((ngh = findgroup(cp)) != NOGRP) {
nlist = gexpand(nlist, ngh, metoo, ntype);
continue;
}
quote:
np = nalloc(cp);
np->n_type = ntype;
/*
* At this point should allow to expand
* to self if only person in group
*/
if (gp == gh->g_list && gp->ge_link == NOGE)
goto skip;
if (!metoo && strcmp(cp, myname) == 0)
np->n_type |= GDEL;
skip:
nlist = put(nlist, np);
}
depth--;
return(nlist);
}
/*
* Compute the length of the passed name list and
* return it.
*/
lengthof(name)
struct name *name;
{
register struct name *np;
register int c;
for (c = 0, np = name; np != NIL; c++, np = np->n_flink)
;
return(c);
}
/*
* Concatenate the two passed name lists, return the result.
*/
struct name *
cat(n1, n2)
struct name *n1, *n2;
{
register struct name *tail;
if (n1 == NIL)
return(n2);
if (n2 == NIL)
return(n1);
tail = tailof(n1);
tail->n_flink = n2;
n2->n_blink = tail;
return(n1);
}
/*
* Unpack the name list onto a vector of strings.
* Return an error if the name list won't fit.
*/
char **
unpack(np)
struct name *np;
{
register char **ap, **top;
register struct name *n;
char *cp;
char hbuf[10];
int t, extra, metoo, verbose;
n = np;
if ((t = lengthof(n)) == 0)
panic("No names to unpack");
/*
* Compute the number of extra arguments we will need.
* We need at least two extra -- one for "mail" and one for
* the terminating 0 pointer. Additional spots may be needed
* to pass along -r and -f to the host mailer.
*/
extra = 2;
if (rflag != NOSTR)
extra += 2;
#ifdef SENDMAIL
extra++;
metoo = value("metoo") != NOSTR;
if (metoo)
extra++;
verbose = value("verbose") != NOSTR;
if (verbose)
extra++;
#endif /* SENDMAIL */
if (hflag)
extra += 2;
top = (char **) salloc((t + extra) * sizeof cp);
ap = top;
*ap++ = "send-mail";
if (rflag != NOSTR) {
*ap++ = "-r";
*ap++ = rflag;
}
#ifdef SENDMAIL
*ap++ = "-i";
if (metoo)
*ap++ = "-m";
if (verbose)
*ap++ = "-v";
#endif /* SENDMAIL */
if (hflag) {
*ap++ = "-h";
snprintf(hbuf, 10, "%d", hflag);
*ap++ = savestr(hbuf);
}
while (n != NIL) {
if (n->n_type & GDEL) {
n = n->n_flink;
continue;
}
tidyaddr(n->n_name, n->n_name);
*ap++ = n->n_name;
n = n->n_flink;
}
*ap = NOSTR;
return(top);
}
/*
* Put another node onto a list of names and return
* the list.
*/
struct name *
put(list, node)
struct name *list, *node;
{
node->n_flink = list;
node->n_blink = NIL;
if (list != NIL)
list->n_blink = node;
return(node);
}
/*
* Determine the number of elements in
* a name list and return it.
*/
count(np)
register struct name *np;
{
register int c = 0;
while (np != NIL) {
c++;
np = np->n_flink;
}
return(c);
}
/*
* Delete the given name from a namelist, using the passed
* function to compare the names.
*/
struct name *
delname(np, name, cmpfun)
register struct name *np;
char name[];
int (* cmpfun)();
{
register struct name *p;
for (p = np; p != NIL; p = p->n_flink)
if ((* cmpfun)(skin(p->n_name), skin(name))) {
if (p->n_blink == NIL) {
if (p->n_flink != NIL)
p->n_flink->n_blink = NIL;
np = p->n_flink;
continue;
}
if (p->n_flink == NIL) {
if (p->n_blink != NIL)
p->n_blink->n_flink = NIL;
continue;
}
p->n_blink->n_flink = p->n_flink;
p->n_flink->n_blink = p->n_blink;
}
return(np);
}