csu@alembic.acs.com (Dave Mack) (07/16/90)
This is the second distribution of the Anonymous Contact Service
software. The distribution consists of 8 shar files. This will
(hopefully) be the last full distribution of the system - all
future versions will be distributed as patches. The patchlevel of
this version is 1.
The ACS software provides a mechanism for posting anonymous articles,
for receiving replies to those articles which are also anonymous, and
permits prolonged anonymous conversations in which neither writer knows
the other's actual e-mail address.
This software is currently being used to provide an anonymous personals
service in alt.personals.
Dave Mack
csu@alembic.ACS.COM
#! /bin/sh
# This is a shell archive. Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file". To overwrite existing
# files, type "sh file -c". You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g.. If this archive is complete, you
# will see the following message at the end:
# "End of archive 8 (of 8)."
# Contents: mailer/headers.c
# Wrapped by csu@alembic on Sun Jul 15 12:46:56 1990
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'mailer/headers.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'mailer/headers.c'\"
else
echo shar: Extracting \"'mailer/headers.c'\" \(15935 characters\)
sed "s/^X//" >'mailer/headers.c' <<'END_OF_FILE'
X/*
X** message spooing, header and address parsing and completion
X** functions for smail/rmail
X*/
X
X#ifndef lint
Xstatic char *sccsid="@(#)headers.c 2.5 (smail) 9/15/87";
X#endif
X
X# include <stdio.h>
X# include <sys/types.h>
X# include <time.h>
X# include <ctype.h>
X# include <pwd.h>
X# include "defs.h"
X
Xextern enum edebug debug; /* how verbose we are */
Xextern char hostname[]; /* */
Xextern char hostdomain[]; /* */
Xextern char *spoolfile; /* file name of spooled message */
Xextern FILE *spoolfp; /* file ptr to spooled message */
Xextern int spoolmaster; /* set if creator of spoolfile */
Xextern time_t now; /* time */
Xextern char nows[], arpanows[]; /* time strings */
Xextern struct tm *gmt, *loc; /* time structs */
Xextern char *from_addr; /* replacement fromaddr with -F */
X
Xstatic char toline[SMLBUF];
Xstatic char fromline[SMLBUF];
Xstatic char dateline[SMLBUF];
Xstatic char midline[SMLBUF];
Xstatic char *ieof = "NOTNULL";
X
Xstruct reqheaders {
X char *name;
X char *field;
X char have;
X};
X
Xstatic struct reqheaders reqtab[] = {
X "Message-Id:" , midline , 'N' ,
X "Date:" , dateline , 'N' ,
X "From:" , fromline , 'N' ,
X "To:" , toline , 'N' ,
X NULL , NULL , 'N'
X};
X
X
X/*
X**
X** parse(): parse <address> into <domain, user, form>.
X**
X** input form
X** ----- ----
X** user LOCAL
X** domain!user DOMAIN
X** user@domain DOMAIN
X** @domain,address LOCAL (just for sendmail)
X** host!address UUCP
X**
X*/
X
Xenum eform
Xparse(address, domain, user)
Xchar *address; /* input address */
Xchar *domain; /* output domain */
Xchar *user; /* output user */
X{
X int parts;
X char *partv[MAXPATH]; /* to crack address */
X
X/*
X** If this is route address form @domain_a,@domain_b:user@domain_c, ...
X*/
X if(*address == '@')
X#ifdef SENDMAIL
X/*
X** hand it to sendmail
X*/
X {
X goto local;
X }
X#else
X/*
X** no sendmail, convert it into a bang path: domain_a!domain_b!domain_c!user
X*/
X {
X char buf[SMLBUF], *p;
X char t_dom[SMLBUF], t_user[SMLBUF];
X
X (void) strcpy(buf, address+1); /* elide leading '@' */
X
X for(p=buf; *p != '\0' ; p++) { /* search for ',' or ':' */
X if(*p == ':') { /* reached end of route */
X break;
X }
X if(*p == ',') { /* elide ','s */
X (void) strcpy(p, p+1);
X }
X if(*p == '@') { /* convert '@' to '!' */
X *p = '!';
X }
X }
X
X if(*p != ':') { /* bad syntax - punt */
X goto local;
X }
X *p = '\0';
X
X if(parse(p+1, t_dom, t_user) != LOCAL) {
X (void) strcat(buf, "!");
X (void) strcat(buf, t_dom);
X }
X (void) strcat(buf, "!");
X (void) strcat(buf, t_user);
X
X /* munge the address (yuk)
X ** it's OK to copy into 'address', because the machinations
X ** above don't increase the string length of the address.
X */
X
X (void) strcpy(address, buf);
X
X /* re-parse the address */
X return(parse(address, domain, user));
X }
X#endif
X/*
X** Try splitting at @. If it works, this is user@domain, form DOMAIN.
X** Prefer the righthand @ in a@b@c.
X*/
X if ((parts = ssplit(address, '@', partv)) >= 2) {
X (void) strcpy(domain, partv[parts-1]);
X (void) strncpy(user, partv[0], partv[parts-1]-partv[0]-1);
X user[partv[parts-1]-partv[0]-1] = '\0';
X return (DOMAIN);
X }
X/*
X** Try splitting at !. If it works, see if the piece before the ! has
X** a . in it (domain!user, form DOMAIN) or not (host!user, form UUCP).
X*/
X if (ssplit(address, '!', partv) > 1) {
X (void) strcpy(user, partv[1]);
X (void) strncpy(domain, partv[0], partv[1]-partv[0]-1);
X domain[partv[1]-partv[0]-1] = '\0';
X
X if((parts = ssplit(domain, '.', partv)) < 2) {
X return(UUCP);
X }
X
X if(partv[parts-1][0] == '\0') {
X partv[parts-1][-1] = '\0'; /* strip trailing . */
X }
X return (DOMAIN);
X }
X/*
X** Done trying. This must be just a user name, form LOCAL.
X*/
Xlocal:
X (void) strcpy(user, address);
X (void) strcpy(domain, "");
X return(LOCAL); /* user */
X}
X
Xbuild(domain, user, form, result)
Xchar *domain;
Xchar *user;
Xenum eform form;
Xchar *result;
X{
X switch((int) form) {
X case LOCAL:
X (void) sprintf(result, "%s", user);
X break;
X case UUCP:
X (void) sprintf(result, "%s!%s", domain, user);
X break;
X case DOMAIN:
X (void) sprintf(result, "%s@%s", user, domain);
X break;
X }
X}
X
X/*
X** ssplit(): split a line into array pointers.
X**
X** Each pointer wordv[i] points to the first character after the i'th
X** occurence of c in buf. Note that each wordv[i] includes wordv[i+1].
X**
X*/
X
Xssplit(buf, c, ptr)
Xregister char *buf; /* line to split up */
Xchar c; /* character to split on */
Xchar **ptr; /* the resultant vector */
X{
X int count = 0;
X int wasword = 0;
X
X for(; *buf; buf++) {
X if (!wasword) {
X count++;
X *ptr++ = buf;
X }
X wasword = (c != *buf);
X }
X if (!wasword) {
X count++;
X *ptr++ = buf;
X }
X *ptr = NULL;
X return(count);
X}
X
X/*
X** Determine whether an address is a local address
X*/
X
Xislocal(addr, domain, user)
Xchar *addr, *domain, *user;
X{
X enum eform form, parse();
X extern char hostuucp[];
X
X /*
X ** parse the address
X */
X
X form = parse(addr, domain, user);
X
X if((form == LOCAL) /* user */
X ||(strcmpic(domain, hostdomain) == 0) /* user@hostdomain */
X ||(strcmpic(domain, hostname) == 0) /* user@hostname */
X#ifdef DOMGATE
X ||(strcmpic(domain, &MYDOM[0]) == 0) /* user@MYDOM w/ dot */
X ||(strcmpic(domain, &MYDOM[1]) == 0) /* user@MYDOM no dot */
X#endif
X ||(strcmpic(domain, hostuucp) == 0)) {/* user@hostuucp */
X return(1);
X }
X return(0);
X}
X
X/*
X** spool - message spooling module
X**
X** (1) get dates for headers, etc.
X** (2) if the message is on the standard input (no '-f')
X** (a) create a temp file for spooling the message.
X** (b) collapse the From_ headers into a path.
X** (c) if the mail originated locally, then
X** (i) establish default headers
X** (ii) scan the message headers for required header fields
X** (iii) add any required message headers that are absent
X** (d) copy rest of the message to the spool file
X** (e) close the spool file
X** (3) open the spool file for reading
X*/
X
Xvoid
Xspool(argc, argv)
Xint argc;
Xchar **argv;
X{
X static char *tmpf = "/tmp/rmXXXXXX"; /* temp file name */
X char *mktemp();
X char buf[SMLBUF];
X static char splbuf[SMLBUF];
X char from[SMLBUF], domain[SMLBUF], user[SMLBUF];
X void rline(), scanheaders(), compheaders();
X
X /*
X ** if the mail has already been spooled by
X ** a previous invocation of smail don't respool.
X ** check the file name to prevent things like
X ** rmail -f /etc/passwd badguy@dreadfuldomain
X */
X
X if((spoolfile != NULL)
X && (strncmp(spoolfile, tmpf, strlen(tmpf) - 6) != 0)) {
X error(EX_TEMPFAIL, "spool: bad file name '%s'\n", spoolfile);
X }
X
X /*
X ** set dates in local, arpa, and gmt forms
X */
X setdates();
X
X /*
X ** If necessary, copy stdin to a temp file.
X */
X
X if(spoolfile == NULL) {
X spoolfile = strcpy(splbuf, tmpf);
X (void) mktemp(spoolfile);
X
X if((spoolfp = fopen(spoolfile, "w")) == NULL) {
X error(EX_CANTCREAT, "can't create %s.\n", spoolfile);
X }
X
X spoolmaster = 1;
X
X /*
X ** rline reads the standard input,
X ** collapsing the From_ and >From_
X ** lines into a single uucp path.
X ** first non-from_ line is in buf[];
X */
X
X rline(from, buf);
X
X /*
X ** if the mail originated here, we parse the header
X ** and add any required headers that are missing.
X */
X
X if(islocal(from, domain, user) || (from_addr != NULL)) {
X /*
X ** initialize default headers
X */
X def_headers(argc, argv, from);
X
X /*
X ** buf has first, non-from_ line
X */
X scanheaders(buf);
X /*
X ** buf has first, non-header line,
X */
X
X compheaders();
X
X if(buf[0] != '\n') {
X (void) fputs("\n", spoolfp);
X }
X }
X
X /*
X ** now, copy the rest of the letter into the spool file
X ** terminate on either EOF or '^.$'
X */
X
X while(ieof != NULL) {
X (void) fputs(buf, spoolfp);
X if((fgets(buf, SMLBUF, stdin) == NULL)
X || (buf[0] == '.' && buf[1] == '\n')) {
X ieof = NULL;
X }
X }
X
X /*
X ** close the spool file, and the standard input.
X */
X
X (void) fclose(spoolfp);
X (void) fclose(stdin); /* you don't see this too often! */
X }
X
X if((spoolfp = fopen(spoolfile, "r")) == NULL) {
X error(EX_TEMPFAIL, "can't open %s.\n", spoolfile);
X }
X}
X
X/*
X**
X** rline(): collapse From_ and >From_ lines.
X**
X** Same idea as the old rmail, but also turns user@domain to domain!user.
X**
X*/
X
Xvoid
Xrline(from, retbuf)
Xchar *from;
Xchar *retbuf;
X{
X int parts; /* for cracking From_ lines ... */
X char *partv[16]; /* ... apart using ssplit() */
X char user[SMLBUF]; /* for rewriting user@host */
X char domain[SMLBUF]; /* " " " */
X char addr[SMLBUF]; /* " " " */
X enum eform form, parse(); /* " " " */
X extern build(); /* " " " */
X char *c;
X int nhops, i;
X char buf[SMLBUF], tmp[SMLBUF], *hop[128], *e, *b;
X char *pwuid();
X
X if(spoolmaster == 0) return;
X
X buf[0] = from[0] = addr[0] = '\0';
X/*
X** Read each line until we hit EOF or a line not beginning with "From "
X** or ">From " (called From_ lines), accumulating the new path in from
X** and stuffing the actual sending user (the user name on the last From_
X** line) in addr.
X*/
X for(;;) {
X (void) strcpy(retbuf, buf);
X if(ieof == NULL) {
X break;
X }
X if((fgets(buf, sizeof(buf), stdin) == NULL)
X || (buf[0] == '.' && buf[1] == '\n')) {
X ieof = NULL;
X break;
X }
X if (strncmp("From ", buf, 5)
X && strncmp(">From ", buf, 6)) {
X break;
X }
X/*
X** Crack the line apart using ssplit.
X*/
X if(c = index(buf, '\n')) {
X *c = '\0';
X }
X parts = ssplit(buf, ' ', partv);
X/*
X** Tack host! onto the from argument if "remote from host" is present.
X*/
X
X if((parts > 3)
X && (strncmp("remote from ", partv[parts-3], 12) == 0)) {
X (void) strcat(from, partv[parts-1]);
X (void) strcat(from, "!");
X }
X/*
X** Stuff user name into addr, overwriting the user name from previous
X** From_ lines, since only the last one counts. Then rewrite user@host
X** into host!user, since @'s don't belong in the From_ argument.
X*/
X if(parts < 2) {
X break;
X } else {
X char *x = partv[1];
X char *q = index(x, ' ');
X if(q != NULL) {
X *q = '\0';
X }
X (void) strcpy(addr, x);
X }
X
X (void) parse(addr, domain, user);
X if(*domain == '\0') {
X form = LOCAL;
X } else {
X form = UUCP;
X }
X
X build(domain, user, form, addr);
X }
X/*
X** Now tack the user name onto the from argument.
X*/
X (void) strcat(from, addr);
X/*
X** If we still have no from argument, we have junk headers, but we try
X** to get the user's name using /etc/passwd.
X*/
X
X if (from[0] == '\0') {
X char *login;
X if ((login = pwuid(getuid())) == NULL) {
X (void) strcpy(from, "nobody"); /* bad news */
X } else {
X (void) strcpy(from, login);
X }
X }
X
X /* split the from line on '!'s */
X nhops = ssplit(from, '!', hop);
X
X for(i = 0; i < (nhops - 1); i++) {
X b = hop[i];
X if(*b == '\0') {
X continue;
X }
X e = hop[i+1];
X e-- ;
X *e = '\0'; /* null terminate each path segment */
X e++;
X
X#ifdef HIDDENHOSTS
X/*
X** Strip hidden hosts: anything.hostname.MYDOM -> hostname.MYDOM
X*/
X for(p = b;(p = index(p, '.')) != NULL; p++) {
X if(strcmpic(hostdomain, p+1) == 0) {
X (void) strcpy(b, hostdomain);
X break;
X }
X }
X#endif
X
X/*
X** Strip useless MYDOM: hostname.MYDOM -> hostname
X*/
X if(strcmpic(hop[i], hostdomain) == 0) {
X (void) strcpy(hop[i], hostname);
X }
X }
X
X/*
X** Now strip out any redundant information in the From_ line
X** a!b!c!c!d => a!b!c!d
X*/
X
X for(i = 0; i < (nhops - 2); i++) {
X b = hop[i];
X e = hop[i+1];
X if(strcmpic(b, e) == 0) {
X *b = '\0';
X }
X }
X/*
X** Reconstruct the From_ line
X*/
X tmp[0] = '\0'; /* empty the tmp buffer */
X
X for(i = 0; i < (nhops - 1); i++) {
X if((hop[i][0] == '\0') /* deleted this hop */
X ||((tmp[0] == '\0') /* first hop == hostname */
X &&(strcmpic(hop[i], hostname) == 0))) {
X continue;
X }
X (void) strcat(tmp, hop[i]);
X (void) strcat(tmp, "!");
X }
X (void) strcat(tmp, hop[i]);
X (void) strcpy(from, tmp);
X (void) strcpy(retbuf, buf);
X (void) fprintf(spoolfp, "%s\n", from);
X}
X
Xvoid
Xscanheaders(buf)
Xchar *buf;
X{
X int inheader = 0;
X
X while(ieof != NULL) {
X if(buf[0] == '\n') {
X break; /* end of headers */
X }
X
X /*
X ** header lines which begin with whitespace
X ** are continuation lines
X */
X if((inheader == 0)
X || ((buf[0] != ' ' && buf[0] != '\t'))) {
X /* not a continuation line
X ** check for header
X */
X if(isheader(buf) == 0) {
X /*
X ** not a header
X */
X break;
X }
X inheader = 1;
X haveheaders(buf);
X }
X (void) fputs(buf, spoolfp);
X if((fgets(buf, SMLBUF, stdin) == NULL)
X || (buf[0] == '.' && buf[1] == '\n')) {
X ieof = NULL;
X }
X }
X
X if(isheader(buf)) {
X buf[0] = '\0';
X }
X}
X
X/*
X** complete headers - add any required headers that are not in the message
X*/
Xvoid
Xcompheaders()
X{
X struct reqheaders *i;
X
X /*
X ** look at the table of required headers and
X ** add those that are missing to the spooled message.
X */
X for(i = reqtab; i->name != NULL; i++) {
X if(i->have != 'Y') {
X (void) fprintf(spoolfp, "%s\n", i->field);
X }
X }
X}
X
X/*
X** look at a string and determine
X** whether or not it is a valid header.
X*/
Xisheader(s)
Xchar *s;
X{
X char *p;
X
X /*
X ** header field names must terminate with a colon
X ** and may not be null.
X */
X if(((p = index(s, ':')) == NULL) || (s == p)) {
X return(0);
X
X }
X /*
X ** header field names must consist entirely of
X ** printable ascii characters.
X */
X while(s != p) {
X if((*s < '!') || (*s > '~')) {
X return(0);
X }
X s++;
X }
X /*
X ** we hit the ':', so the field may be a header
X */
X return(1);
X}
X
X/*
X** compare the header field to those in the required header table.
X** if it matches, then mark the required header as being present
X** in the message.
X*/
Xhaveheaders(s)
Xchar *s;
X{
X struct reqheaders *i;
X
X for(i = reqtab; i->name != NULL; i++) {
X if(strncmpic(i->name, s, strlen(i->name)) == 0) {
X if((strncmpic("From:", s, 5) == 0)
X && (from_addr != NULL)) {
X (void) sprintf(s, "From: %s\n", from_addr);
X }
X i->have = 'Y';
X break;
X }
X }
X}
X
X/*
X** create default headers for the message.
X*/
Xdef_headers(argc, argv, from)
Xint argc;
Xchar **argv;
Xchar *from;
X{
X def_to(argc, argv); /* default To: */
X def_date(); /* default Date: */
X def_from(from); /* default From: */
X def_mid(); /* default Message-Id: */
X}
X
X/*
X** default Date: in arpa format
X*/
Xdef_date()
X{
X (void) strcpy(dateline, "Date: ");
X (void) strcat(dateline, arpanows);
X}
X
X/*
X** default Message-Id
X** Message-Id: <yymmddhhmm.AAppppp@hostdomain>
X**
X** yy year
X** mm month
X** dd day
X** hh hour
X** mm minute
X** ppppp process-id
X**
X** date and time are set by GMT
X*/
Xdef_mid()
X{
X (void) sprintf(midline, "Message-Id: <%02d%02d%02d%02d%02d.AA%05d@%s>",
X gmt->tm_year,
X gmt->tm_mon+1,
X gmt->tm_mday,
X gmt->tm_hour,
X gmt->tm_min,
X getpid(),
X hostdomain);
X}
X
X/*
X** default From:
X** From: user@hostdomain (Full Name)
X*/
Xdef_from(from)
Xchar *from;
X{
X
X char *nameptr;
X char name[SMLBUF];
X char *getenv(), *login;
X char *pwfnam(), *pwuid();
X
X if (from_addr != NULL) {
X (void) sprintf(fromline, "From: %s", from_addr);
X return;
X }
X
X name[0] = '\0';
X if((nameptr = getenv("NAME")) != NULL) {
X (void) strcpy(name, nameptr);
X } else if((login = pwuid(getuid())) != NULL) {
X if((nameptr = pwfnam(login)) != NULL) {
X (void) strcpy(name, nameptr);
X }
X }
X if(name[0] != '\0') {
X (void) sprintf(fromline,
X "From: %s@%s (%s)", from, hostdomain, name);
X } else {
X (void) sprintf(fromline,
X "From: %s@%s", from, hostdomain);
X }
X}
X
X/*
X** default To:
X** To: recip1, recip2, ...
X**
X** lines longer than 50 chars are continued on another line.
X*/
Xdef_to(argc, argv)
Xint argc;
Xchar **argv;
X{
X int i, n;
X char *bol;
X
X bol = toline;
X (void) strcpy(bol, "To: ");
X for(n = i = 0; i < argc; i++) {
X (void) strcat(bol, argv[i]);
X
X if((index(argv[i], '!') == NULL)
X && (index(argv[i], '@') == NULL)) {
X (void) strcat(bol, "@");
X (void) strcat(bol, hostdomain);
X }
X if(i+1 < argc) {
X n = strlen(bol);
X if(n > 50) {
X (void) strcat(bol, ",\n\t");
X bol = bol + strlen(bol);
X *bol = '\0';
X n = 8;
X } else {
X (void) strcat(bol, ", ");
X }
X }
X }
X}
END_OF_FILE
if test 15935 -ne `wc -c <'mailer/headers.c'`; then
echo shar: \"'mailer/headers.c'\" unpacked with wrong size!
fi
# end of 'mailer/headers.c'
fi
echo shar: End of archive 8 \(of 8\).
cp /dev/null ark8isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 ; do
if test ! -f ark${I}isdone ; then
MISSING="${MISSING} ${I}"
fi
done
if test "${MISSING}" = "" ; then
echo You have unpacked all 8 archives.
rm -f ark[1-9]isdone
else
echo You still need to unpack the following archives:
echo " " ${MISSING}
fi
## End of shell archive.
exit 0