3 * aliasbr.c -- new aliasing mechanism
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
11 #include <h/aliasbr.h>
12 #include <h/addrsbr.h>
20 struct aka *akahead = NULL;
21 struct aka *akatail = NULL;
23 struct home *homehead = NULL;
24 struct home *hometail = NULL;
32 char *akresult (struct aka *);
33 char *akvalue (char *);
36 static char *akval (struct aka *, char *);
37 static int aleq (char *, char *);
38 static char *scanp (unsigned char *);
39 static char *getp (char *);
40 static char *seekp (char *, char *, char **);
41 static int addfile (struct aka *, char *);
42 static int addgroup (struct aka *, char *);
43 static int addmember (struct aka *, char *);
44 static int addall (struct aka *);
45 static char *getalias (char *);
46 static void add_aka (struct aka *, char *);
47 static struct aka *akalloc (char *);
48 static struct home *hmalloc (struct passwd *);
51 /* Do mh alias substitution on 's' and return the results. */
61 v = akval (akahead, s);
76 akresult (struct aka *ak)
78 register char *cp = NULL, *dp, *pp;
79 register struct adr *ad;
81 for (ad = ak->ak_addr; ad; ad = ad->ad_next) {
82 pp = ad->ad_local ? akval (ak->ak_next, ad->ad_text)
83 : getcpy (ad->ad_text);
87 cp = concat (cp, ",", pp, NULL);
96 akvis = ak->ak_visible;
102 akval (struct aka *ak, char *s)
107 for (; ak; ak = ak->ak_next) {
108 if (aleq (s, ak->ak_name)) {
109 return akresult (ak);
110 } else if (strchr (s, ':')) {
111 /* The first address in a blind list will contain the
112 alias name, so try to match, but just with just the
113 address (not including the list name). If there's a
114 match, then replace the alias part with its
117 char *name = getname (s);
121 /* s is of the form "Blind list: address". If address
122 is an alias, expand it. */
123 struct mailname *mp = getm (name, NULL, 0, AD_NAME, NULL);
125 if (mp && mp->m_ingrp) {
126 char *gname = add (mp->m_gname, NULL);
128 if (gname && aleq (name, ak->ak_name)) {
130 cp = concat (gname, akresult (ak), NULL);
138 /* Need to flush getname after use. */
139 while (getname ("")) continue;
152 aleq (char *string, char *aliasent)
156 while ((c = *string++))
157 if (*aliasent == '*')
160 if ((c | 040) != (*aliasent | 040))
165 return (*aliasent == 0 || *aliasent == '*');
173 register char *bp, *cp, *pp;
175 register struct aka *ak = NULL;
179 && (strncmp (file, "./", 2) && strncmp (file, "../", 3)))
180 file = etcpath (file);
181 if ((fp = fopen (file, "r")) == NULL) {
186 while (vfgets (fp, &ap) == OK) {
188 switch (*(pp = scanp (bp))) {
189 case '<': /* recurse a level */
190 if (!*(cp = getp (pp + 1))) {
191 akerrst = "'<' without alias-file";
195 if ((i = alias (cp)) != AK_OK) {
200 case ':': /* comment */
208 if (!*(cp = seekp (pp, &lc, &ap))) {
212 if (!(ak = akalloc (cp))) {
230 switch (*(pp = scanp (ap))) {
235 case '<': /* read values from file */
236 if (!*(cp = getp (pp + 1))) {
240 if (!addfile (ak, cp)) {
246 case '=': /* UNIX group */
247 if (!*(cp = getp (pp + 1))) {
251 if (!addgroup (ak, cp)) {
257 case '+': /* UNIX group members */
258 if (!*(cp = getp (pp + 1))) {
262 if (!addmember (ak, cp)) {
268 case '*': /* Everyone */
273 while ((cp = getalias (pp)))
287 static char buffer[BUFSIZ];
291 snprintf (buffer, sizeof(buffer), "unable to read '%s'", akerrst);
295 snprintf (buffer, sizeof(buffer), "error in line '%s'", akerrst);
299 snprintf (buffer, sizeof(buffer), "out of memory while on '%s'", akerrst);
303 snprintf (buffer, sizeof(buffer), "no such group as '%s'", akerrst);
307 snprintf (buffer, sizeof(buffer), "unknown error (%d)", i);
316 scanp (unsigned char *p)
327 register unsigned char *cp = scanp (p);
330 while (!isspace (*cp) && *cp)
339 seekp (char *p, char *c, char **a)
341 register unsigned char *cp;
344 while (!isspace (*cp) && *cp && *cp != ':' && *cp != ';')
355 addfile (struct aka *ak, char *file)
361 if (!(fp = fopen (etcpath (file), "r"))) {
366 while (fgets (buffer, sizeof buffer, fp))
367 while ((cp = getalias (buffer)))
376 addgroup (struct aka *ak, char *grp)
379 register struct group *gr = getgrnam (grp);
380 register struct home *hm = NULL;
383 gr = getgrgid (atoi (grp));
389 while ((gp = *gr->gr_mem++))
392 for (hm = homehead; hm; hm = hm->h_next)
393 if (!strcmp (hm->h_name, gp)) {
394 add_aka (ak, hm->h_name);
397 if ((pw = getpwnam(gp)))
409 addmember (struct aka *ak, char *grp)
412 register struct group *gr = getgrnam (grp);
413 register struct home *hm = NULL;
428 for (hm = homehead; hm; hm = hm->h_next)
429 if (hm->h_gid == gid)
430 add_aka (ak, hm->h_name);
437 addall (struct aka *ak)
439 int noshell = NoShell == NULL || *NoShell == 0;
440 register struct home *hm;
447 for (hm = homehead; hm; hm = hm->h_next)
448 if ((int) hm->h_uid > Everyone
449 && (noshell || strcmp (hm->h_shell, NoShell)))
450 add_aka (ak, hm->h_name);
452 return homehead != NULL;
457 getalias (char *addrs)
459 register unsigned char *pp, *qp;
460 static char *cp = NULL;
468 /* Remove leading any space from the address. */
469 for (pp = cp; isspace (*pp); pp++)
473 /* Find the end of the address. */
474 for (qp = pp; *qp != 0 && *qp != ','; qp++)
476 /* Set cp to point to the remainder of the addresses. */
479 for (cp = qp, qp--; qp > pp; qp--)
492 add_aka (struct aka *ak, char *pp)
494 register struct adr *ad, *ld;
496 for (ad = ak->ak_addr, ld = NULL; ad; ld = ad, ad = ad->ad_next)
497 if (!strcmp (pp, ad->ad_text))
500 ad = (struct adr *) mh_xmalloc (sizeof(*ad));
501 ad->ad_text = getcpy (pp);
502 ad->ad_local = strchr(pp, '@') == NULL && strchr(pp, '!') == NULL;
514 register struct passwd *pw;
519 /* if the list has yet to be initialized */
520 /* zap the list, and rebuild from scratch */
527 while ((pw = getpwent ()))
539 register struct aka *p;
541 p = (struct aka *) mh_xmalloc (sizeof(*p));
543 p->ak_name = getcpy (id);
548 akatail->ak_next = p;
558 hmalloc (struct passwd *pw)
560 register struct home *p;
562 p = (struct home *) mh_xmalloc (sizeof(*p));
564 p->h_name = getcpy (pw->pw_name);
565 p->h_uid = pw->pw_uid;
566 p->h_gid = pw->pw_gid;
567 p->h_home = getcpy (pw->pw_dir);
568 p->h_shell = getcpy (pw->pw_shell);
571 if (hometail != NULL)
572 hometail->h_next = p;
573 if (homehead == NULL)