home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1983 Eric P. Allman
- * Copyright (c) 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)recipient.c 5.19 (Berkeley) 3/2/91";
- #endif /* not lint */
-
- # include <sys/types.h>
- # include <sys/stat.h>
- # include <pwd.h>
- # include "sendmail.h"
-
- /*
- ** SENDTOLIST -- Designate a send list.
- **
- ** The parameter is a comma-separated list of people to send to.
- ** This routine arranges to send to all of them.
- **
- ** Parameters:
- ** list -- the send list.
- ** ctladdr -- the address template for the person to
- ** send to -- effective uid/gid are important.
- ** This is typically the alias that caused this
- ** expansion.
- ** sendq -- a pointer to the head of a queue to put
- ** these people into.
- **
- ** Returns:
- ** none
- **
- ** Side Effects:
- ** none.
- */
-
- # define MAXRCRSN 10
-
- sendtolist(list, ctladdr, sendq)
- char *list;
- ADDRESS *ctladdr;
- ADDRESS **sendq;
- {
- register char *p;
- register ADDRESS *al; /* list of addresses to send to */
- bool firstone; /* set on first address sent */
- bool selfref; /* set if this list includes ctladdr */
- char delimiter; /* the address delimiter */
-
- if (tTd(25, 1))
- {
- printf("sendto: %s\n ctladdr=", list);
- printaddr(ctladdr, FALSE);
- }
-
- /* heuristic to determine old versus new style addresses */
- if (ctladdr == NULL &&
- (index(list, ',') != NULL || index(list, ';') != NULL ||
- index(list, '<') != NULL || index(list, '(') != NULL))
- CurEnv->e_flags &= ~EF_OLDSTYLE;
- delimiter = ' ';
- if (!bitset(EF_OLDSTYLE, CurEnv->e_flags) || ctladdr != NULL)
- delimiter = ',';
-
- firstone = TRUE;
- selfref = FALSE;
- al = NULL;
-
- for (p = list; *p != '\0'; )
- {
- register ADDRESS *a;
- extern char *DelimChar; /* defined in prescan */
-
- /* parse the address */
- while (isspace(*p) || *p == ',')
- p++;
- a = parseaddr(p, (ADDRESS *) NULL, 1, delimiter);
- p = DelimChar;
- if (a == NULL)
- continue;
- a->q_next = al;
- a->q_alias = ctladdr;
-
- /* see if this should be marked as a primary address */
- if (ctladdr == NULL ||
- (firstone && *p == '\0' && bitset(QPRIMARY, ctladdr->q_flags)))
- a->q_flags |= QPRIMARY;
-
- /* put on send queue or suppress self-reference */
- if (ctladdr != NULL && sameaddr(ctladdr, a))
- selfref = TRUE;
- else
- al = a;
- firstone = FALSE;
- }
-
- /* if this alias doesn't include itself, delete ctladdr */
- if (!selfref && ctladdr != NULL)
- ctladdr->q_flags |= QDONTSEND;
-
- /* arrange to send to everyone on the local send list */
- while (al != NULL)
- {
- register ADDRESS *a = al;
- extern ADDRESS *recipient();
-
- al = a->q_next;
- setctladdr(a);
- a = recipient(a, sendq);
-
- /* arrange to inherit full name */
- if (a->q_fullname == NULL && ctladdr != NULL)
- a->q_fullname = ctladdr->q_fullname;
- }
-
- CurEnv->e_to = NULL;
- }
- /*
- ** RECIPIENT -- Designate a message recipient
- **
- ** Saves the named person for future mailing.
- **
- ** Parameters:
- ** a -- the (preparsed) address header for the recipient.
- ** sendq -- a pointer to the head of a queue to put the
- ** recipient in. Duplicate supression is done
- ** in this queue.
- **
- ** Returns:
- ** The actual address in the queue. This will be "a" if
- ** the address is not a duplicate, else the original address.
- **
- ** Side Effects:
- ** none.
- */
-
- extern ADDRESS *getctladdr();
-
- ADDRESS *
- recipient(a, sendq)
- register ADDRESS *a;
- register ADDRESS **sendq;
- {
- register ADDRESS *q;
- ADDRESS **pq;
- register struct mailer *m;
- register char *p;
- bool quoted = FALSE; /* set if the addr has a quote bit */
- char buf[MAXNAME]; /* unquoted image of the user name */
- extern bool safefile();
-
- CurEnv->e_to = a->q_paddr;
- m = a->q_mailer;
- errno = 0;
- if (tTd(26, 1))
- {
- printf("\nrecipient: ");
- printaddr(a, FALSE);
- }
-
- /* break aliasing loops */
- if (AliasLevel > MAXRCRSN)
- {
- usrerr("aliasing/forwarding loop broken");
- return (a);
- }
-
- /*
- ** Finish setting up address structure.
- */
-
- /* set the queue timeout */
- a->q_timeout = TimeOut;
-
- /* map user & host to lower case if requested on non-aliases */
- if (a->q_alias == NULL)
- loweraddr(a);
-
- /* get unquoted user for file, program or user.name check */
- (void) strcpy(buf, a->q_user);
- for (p = buf; *p != '\0' && !quoted; p++)
- {
- if (!isascii(*p) && (*p & 0377) != (SpaceSub & 0377))
- quoted = TRUE;
- }
- stripquotes(buf, TRUE);
-
- /* do sickly crude mapping for program mailing, etc. */
- if (m == LocalMailer && buf[0] == '|')
- {
- a->q_mailer = m = ProgMailer;
- a->q_user++;
- if (a->q_alias == NULL && !QueueRun && !ForceMail)
- {
- a->q_flags |= QDONTSEND|QBADADDR;
- usrerr("Cannot mail directly to programs");
- }
- }
-
- /*
- ** Look up this person in the recipient list.
- ** If they are there already, return, otherwise continue.
- ** If the list is empty, just add it. Notice the cute
- ** hack to make from addresses suppress things correctly:
- ** the QDONTSEND bit will be set in the send list.
- ** [Please note: the emphasis is on "hack."]
- */
-
- for (pq = sendq; (q = *pq) != NULL; pq = &q->q_next)
- {
- if (!ForceMail && sameaddr(q, a))
- {
- if (tTd(26, 1))
- {
- printf("%s in sendq: ", a->q_paddr);
- printaddr(q, FALSE);
- }
- if (!bitset(QDONTSEND, a->q_flags))
- message(Arpa_Info, "duplicate suppressed");
- if (!bitset(QPRIMARY, q->q_flags))
- q->q_flags |= a->q_flags;
- return (q);
- }
- }
-
- /* add address on list */
- *pq = a;
- a->q_next = NULL;
- CurEnv->e_nrcpts++;
-
- /*
- ** Alias the name and handle :include: specs.
- */
-
- if (m == LocalMailer && !bitset(QDONTSEND, a->q_flags))
- {
- if (strncmp(a->q_user, ":include:", 9) == 0)
- {
- a->q_flags |= QDONTSEND;
- if (a->q_alias == NULL && !QueueRun && !ForceMail)
- {
- a->q_flags |= QBADADDR;
- usrerr("Cannot mail directly to :include:s");
- }
- else
- {
- message(Arpa_Info, "including file %s", &a->q_user[9]);
- include(&a->q_user[9], " sending", a, sendq);
- }
- }
- else
- alias(a, sendq);
- }
-
- /*
- ** If the user is local and still being sent, verify that
- ** the address is good. If it is, try to forward.
- ** If the address is already good, we have a forwarding
- ** loop. This can be broken by just sending directly to
- ** the user (which is probably correct anyway).
- */
-
- if (!bitset(QDONTSEND, a->q_flags) && m == LocalMailer)
- {
- struct stat stb;
- extern bool writable();
-
- /* see if this is to a file */
- if (buf[0] == '/')
- {
- p = rindex(buf, '/');
- /* check if writable or creatable */
- if (a->q_alias == NULL && !QueueRun && !ForceMail)
- {
- a->q_flags |= QDONTSEND|QBADADDR;
- usrerr("Cannot mail directly to files");
- }
- else if ((stat(buf, &stb) >= 0) ? (!writable(&stb)) :
- (*p = '\0', !safefile(buf, getruid(), S_IWRITE|S_IEXEC)))
- {
- a->q_flags |= QBADADDR;
- giveresponse(EX_CANTCREAT, m, CurEnv);
- }
- }
- else
- {
- register struct passwd *pw;
- extern struct passwd *finduser();
-
- /* warning -- finduser may trash buf */
- pw = finduser(buf);
- if (pw == NULL)
- {
- a->q_flags |= QBADADDR;
- giveresponse(EX_NOUSER, m, CurEnv);
- }
- else
- {
- char nbuf[MAXNAME];
-
- if (strcmp(a->q_user, pw->pw_name) != 0)
- {
- a->q_user = newstr(pw->pw_name);
- (void) strcpy(buf, pw->pw_name);
- }
- a->q_home = newstr(pw->pw_dir);
- a->q_uid = pw->pw_uid;
- a->q_gid = pw->pw_gid;
- a->q_flags |= QGOODUID;
- buildfname(pw->pw_gecos, pw->pw_name, nbuf);
- if (nbuf[0] != '\0')
- a->q_fullname = newstr(nbuf);
- if (!quoted)
- forward(a, sendq);
- }
- }
- }
- return (a);
- }
- /*
- ** FINDUSER -- find the password entry for a user.
- **
- ** This looks a lot like getpwnam, except that it may want to
- ** do some fancier pattern matching in /etc/passwd.
- **
- ** This routine contains most of the time of many sendmail runs.
- ** It deserves to be optimized.
- **
- ** Parameters:
- ** name -- the name to match against.
- **
- ** Returns:
- ** A pointer to a pw struct.
- ** NULL if name is unknown or ambiguous.
- **
- ** Side Effects:
- ** may modify name.
- */
-
- struct passwd *
- finduser(name)
- char *name;
- {
- register struct passwd *pw;
- register char *p;
- extern struct passwd *getpwent();
- extern struct passwd *getpwnam();
-
- /* map upper => lower case */
- for (p = name; *p != '\0'; p++)
- {
- if (isascii(*p) && isupper(*p))
- *p = tolower(*p);
- }
-
- /* look up this login name using fast path */
- if ((pw = getpwnam(name)) != NULL)
- return (pw);
-
- /* search for a matching full name instead */
- for (p = name; *p != '\0'; p++)
- {
- if (*p == (SpaceSub & 0177) || *p == '_')
- *p = ' ';
- }
- (void) setpwent();
- while ((pw = getpwent()) != NULL)
- {
- char buf[MAXNAME];
-
- buildfname(pw->pw_gecos, pw->pw_name, buf);
- if (index(buf, ' ') != NULL && !strcasecmp(buf, name))
- {
- message(Arpa_Info, "sending to login name %s", pw->pw_name);
- return (pw);
- }
- }
- return (NULL);
- }
- /*
- ** WRITABLE -- predicate returning if the file is writable.
- **
- ** This routine must duplicate the algorithm in sys/fio.c.
- ** Unfortunately, we cannot use the access call since we
- ** won't necessarily be the real uid when we try to
- ** actually open the file.
- **
- ** Notice that ANY file with ANY execute bit is automatically
- ** not writable. This is also enforced by mailfile.
- **
- ** Parameters:
- ** s -- pointer to a stat struct for the file.
- **
- ** Returns:
- ** TRUE -- if we will be able to write this file.
- ** FALSE -- if we cannot write this file.
- **
- ** Side Effects:
- ** none.
- */
-
- bool
- writable(s)
- register struct stat *s;
- {
- int euid, egid;
- int bits;
-
- if (bitset(0111, s->st_mode))
- return (FALSE);
- euid = getruid();
- egid = getrgid();
- if (geteuid() == 0)
- {
- if (bitset(S_ISUID, s->st_mode))
- euid = s->st_uid;
- if (bitset(S_ISGID, s->st_mode))
- egid = s->st_gid;
- }
-
- if (euid == 0)
- return (TRUE);
- bits = S_IWRITE;
- if (euid != s->st_uid)
- {
- bits >>= 3;
- if (egid != s->st_gid)
- bits >>= 3;
- }
- return ((s->st_mode & bits) != 0);
- }
- /*
- ** INCLUDE -- handle :include: specification.
- **
- ** Parameters:
- ** fname -- filename to include.
- ** msg -- message to print in verbose mode.
- ** ctladdr -- address template to use to fill in these
- ** addresses -- effective user/group id are
- ** the important things.
- ** sendq -- a pointer to the head of the send queue
- ** to put these addresses in.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** reads the :include: file and sends to everyone
- ** listed in that file.
- */
-
- include(fname, msg, ctladdr, sendq)
- char *fname;
- char *msg;
- ADDRESS *ctladdr;
- ADDRESS **sendq;
- {
- char buf[MAXLINE];
- register FILE *fp;
- char *oldto = CurEnv->e_to;
- char *oldfilename = FileName;
- int oldlinenumber = LineNumber;
-
- fp = fopen(fname, "r");
- if (fp == NULL)
- {
- usrerr("Cannot open %s", fname);
- return;
- }
- if (getctladdr(ctladdr) == NULL)
- {
- struct stat st;
-
- if (fstat(fileno(fp), &st) < 0)
- syserr("Cannot fstat %s!", fname);
- ctladdr->q_uid = st.st_uid;
- ctladdr->q_gid = st.st_gid;
- ctladdr->q_flags |= QGOODUID;
- }
-
- /* read the file -- each line is a comma-separated list. */
- FileName = fname;
- LineNumber = 0;
- while (fgets(buf, sizeof buf, fp) != NULL)
- {
- register char *p = index(buf, '\n');
-
- LineNumber++;
- if (p != NULL)
- *p = '\0';
- if (buf[0] == '\0')
- continue;
- CurEnv->e_to = oldto;
- message(Arpa_Info, "%s to %s", msg, buf);
- AliasLevel++;
- sendtolist(buf, ctladdr, sendq);
- AliasLevel--;
- }
-
- (void) fclose(fp);
- FileName = oldfilename;
- LineNumber = oldlinenumber;
- }
- /*
- ** SENDTOARGV -- send to an argument vector.
- **
- ** Parameters:
- ** argv -- argument vector to send to.
- **
- ** Returns:
- ** none.
- **
- ** Side Effects:
- ** puts all addresses on the argument vector onto the
- ** send queue.
- */
-
- sendtoargv(argv)
- register char **argv;
- {
- register char *p;
-
- while ((p = *argv++) != NULL)
- {
- if (argv[0] != NULL && argv[1] != NULL && !strcasecmp(argv[0], "at"))
- {
- char nbuf[MAXNAME];
-
- if (strlen(p) + strlen(argv[1]) + 2 > sizeof nbuf)
- usrerr("address overflow");
- else
- {
- (void) strcpy(nbuf, p);
- (void) strcat(nbuf, "@");
- (void) strcat(nbuf, argv[1]);
- p = newstr(nbuf);
- argv += 2;
- }
- }
- sendtolist(p, (ADDRESS *) NULL, &CurEnv->e_sendqueue);
- }
- }
- /*
- ** GETCTLADDR -- get controlling address from an address header.
- **
- ** If none, get one corresponding to the effective userid.
- **
- ** Parameters:
- ** a -- the address to find the controller of.
- **
- ** Returns:
- ** the controlling address.
- **
- ** Side Effects:
- ** none.
- */
-
- ADDRESS *
- getctladdr(a)
- register ADDRESS *a;
- {
- while (a != NULL && !bitset(QGOODUID, a->q_flags))
- a = a->q_alias;
- return (a);
- }
-