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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 the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, 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'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)names.c 5.13 (Berkeley) 7/8/88";
- #endif /* not lint */
-
- /*
- * Mail -- a mail program
- *
- * Handle name lists.
- */
-
- #include "rcv.h"
-
- /*
- * Allocate a single element of a name list,
- * initialize its name field to the passed
- * name and return it.
- */
- struct name *
- nalloc(str, ntype)
- char str[];
- {
- register struct name *np;
-
- np = (struct name *) salloc(sizeof *np);
- np->n_flink = NIL;
- np->n_blink = NIL;
- np->n_type = ntype;
- 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];
-
- if (line == NOSTR || *line == '\0')
- return NIL;
- top = NIL;
- np = NIL;
- cp = line;
- while ((cp = yankword(cp, nbuf)) != NOSTR) {
- t = nalloc(nbuf, 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;
- 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);
- if (comma && p->n_flink != NIL)
- *cp++ = ',';
- *cp++ = ' ';
- }
- *--cp = 0;
- if (comma && *--cp == ',')
- *cp = 0;
- return(top);
- }
-
- /*
- * Grab a single word (liberal word)
- * Throw away things between ()'s, and take anything between <>.
- */
- char *
- yankword(ap, wbuf)
- char *ap, wbuf[];
- {
- register char *cp, *cp2;
-
- cp = ap;
- for (;;) {
- if (*cp == '\0')
- return NOSTR;
- if (*cp == '(') {
- register int nesting = 0;
-
- while (*cp != '\0') {
- switch (*cp++) {
- case '(':
- nesting++;
- break;
- case ')':
- --nesting;
- break;
- }
- if (nesting <= 0)
- break;
- }
- } else if (*cp == ' ' || *cp == '\t' || *cp == ',')
- cp++;
- else
- break;
- }
- if (*cp == '<')
- for (cp2 = wbuf; *cp && (*cp2++ = *cp++) != '>';)
- ;
- else
- for (cp2 = wbuf; *cp && !index(" \t,(", *cp); *cp2++ = *cp++)
- ;
- *cp2 = '\0';
- return cp;
- }
-
- /*
- * 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;
- time_t now, time();
- char *date, *fname, *ctime();
- FILE *fout, *fin;
- int ispipe;
- extern char tempEdit[];
-
- top = names;
- np = names;
- (void) 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);
- (void) unlink(tempEdit);
- if (image < 0) {
- perror(tempEdit);
- senderr++;
- goto cant;
- }
- else {
- fprintf(fout, "From %s %s", myname, date);
- puthead(hp, fout, GTO|GSUBJECT|GCC|GNL);
- while ((c = getc(fo)) != EOF)
- (void) putc(c, fout);
- rewind(fo);
- (void) putc('\n', fout);
- (void) fflush(fout);
- if (ferror(fout))
- perror(tempEdit);
- (void) 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) {
- int pid;
- char *shell;
-
- /* XXX, can't really reuse the same image file */
- if ((shell = value("SHELL")) == NOSTR)
- shell = SHELL;
- pid = start_command(shell, sigmask(SIGHUP)|
- sigmask(SIGINT)|sigmask(SIGQUIT),
- image, -1, "-c", fname, NOSTR);
- if (pid < 0) {
- senderr++;
- goto cant;
- }
- free_child(pid);
- } 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");
- (void) fclose(fout);
- senderr++;
- goto cant;
- }
- rewind(fin);
- while ((c = getc(fin)) != EOF)
- (void) putc(c, fout);
- if (ferror(fout))
- senderr++, perror(fname);
- (void) fclose(fout);
- (void) 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.
- */
- np->n_type |= GDEL;
- np = np->n_flink;
- }
- if (image >= 0) {
- (void) close(image);
- image = -1;
- }
- return(top);
- }
-
- /*
- * 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. We cheat with .'s to allow path names like ./...
- */
- isfileaddr(name)
- char *name;
- {
- register char *cp;
-
- if (*name == '+')
- return 1;
- for (cp = name; *cp; cp++) {
- if (*cp == '!' || *cp == '%' || *cp == '@')
- 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 grouphead *gh;
- register int metoo;
-
- new = NIL;
- np = names;
- 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, 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);
- }
-
- /*
- * 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;
- int t, extra, metoo, verbose;
-
- n = np;
- if ((t = count(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 -f to the host mailer.
- */
- extra = 2;
- extra++;
- metoo = value("metoo") != NOSTR;
- if (metoo)
- extra++;
- verbose = value("verbose") != NOSTR;
- if (verbose)
- extra++;
- top = (char **) salloc((t + extra) * sizeof *top);
- ap = top;
- *ap++ = "send-mail";
- *ap++ = "-i";
- if (metoo)
- *ap++ = "-m";
- if (verbose)
- *ap++ = "-v";
- for (; n != NIL; n = n->n_flink)
- if ((n->n_type & GDEL) == 0)
- *ap++ = n->n_name;
- *ap = NOSTR;
- return(top);
- }
-
- /*
- * Remove all of the duplicates from the passed name list by
- * insertion sorting them, then checking for dups.
- * Return the head of the new list.
- */
- struct name *
- elide(names)
- struct name *names;
- {
- register struct name *np, *t, *new;
- struct name *x;
-
- if (names == NIL)
- return(NIL);
- new = names;
- np = names;
- np = np->n_flink;
- if (np != NIL)
- np->n_blink = NIL;
- new->n_flink = NIL;
- while (np != NIL) {
- t = new;
- while (strcasecmp(t->n_name, np->n_name) < 0) {
- if (t->n_flink == NIL)
- break;
- t = t->n_flink;
- }
-
- /*
- * If we ran out of t's, put the new entry after
- * the current value of t.
- */
-
- if (strcasecmp(t->n_name, np->n_name) < 0) {
- t->n_flink = np;
- np->n_blink = t;
- t = np;
- np = np->n_flink;
- t->n_flink = NIL;
- continue;
- }
-
- /*
- * Otherwise, put the new entry in front of the
- * current t. If at the front of the list,
- * the new guy becomes the new head of the list.
- */
-
- if (t == new) {
- t = np;
- np = np->n_flink;
- t->n_flink = new;
- new->n_blink = t;
- t->n_blink = NIL;
- new = t;
- continue;
- }
-
- /*
- * The normal case -- we are inserting into the
- * middle of the list.
- */
-
- x = np;
- np = np->n_flink;
- x->n_flink = t;
- x->n_blink = t->n_blink;
- t->n_blink->n_flink = x;
- t->n_blink = x;
- }
-
- /*
- * Now the list headed up by new is sorted.
- * Go through it and remove duplicates.
- */
-
- np = new;
- while (np != NIL) {
- t = np;
- while (t->n_flink != NIL &&
- strcasecmp(np->n_name, t->n_flink->n_name) == 0)
- t = t->n_flink;
- if (t == np || t == NIL) {
- np = np->n_flink;
- continue;
- }
-
- /*
- * Now t points to the last entry with the same name
- * as np. Make np point beyond t.
- */
-
- np->n_flink = t->n_flink;
- if (t->n_flink != NIL)
- t->n_flink->n_blink = np;
- np = np->n_flink;
- }
- return(new);
- }
-
- /*
- * 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 undeleted elements in
- * a name list and return it.
- */
- count(np)
- register struct name *np;
- {
- register int c;
-
- for (c = 0; np != NIL; np = np->n_flink)
- if ((np->n_type & GDEL) == 0)
- c++;
- return c;
- }
-
- /*
- * Delete the given name from a namelist.
- */
- struct name *
- delname(np, name)
- register struct name *np;
- char name[];
- {
- register struct name *p;
-
- for (p = np; p != NIL; p = p->n_flink)
- if (strcasecmp(p->n_name, name) == 0) {
- 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;
- }
-
- /*
- * Pretty print a name list
- * Uncomment it if you need it.
- */
-
- /*
- prettyprint(name)
- struct name *name;
- {
- register struct name *np;
-
- np = name;
- while (np != NIL) {
- fprintf(stderr, "%s(%d) ", np->n_name, np->n_type);
- np = np->n_flink;
- }
- fprintf(stderr, "\n");
- }
- */
-