+void
+unlink_done()
+{
+ /*
+ ** Check if we need to remove stray temporary files.
+ */
+ if (unlink_infile) {
+ unlink(infile);
+ }
+ if (unlink_outfile) {
+ unlink(outfile);
+ }
+}
+
+/*
+** Main routine for translating composition file
+** into valid MIME message. It translates the draft
+** into a content structure (actually a tree of content
+** structures). This message then can be manipulated
+** in various ways, including being output via
+** output_message().
+*/
+static CT
+build_mime(char *infile)
+{
+ int compnum, state;
+ char buf[BUFSIZ], name[NAMESZ];
+ char *cp, *np, *vp;
+ struct multipart *m;
+ struct part **pp;
+ CT ct;
+ FILE *in;
+
+ umask(~m_gmprot());
+
+ /* open the composition draft */
+ if ((in = fopen(infile, "r")) == NULL)
+ adios(EX_IOERR, infile, "unable to open for reading");
+
+ /*
+ ** Allocate space for primary (outside) content
+ */
+ if ((ct = (CT) calloc(1, sizeof(*ct))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+
+ /*
+ ** Allocate structure for handling decoded content
+ ** for this part. We don't really need this, but
+ ** allocate it to remain consistent.
+ */
+ init_decoded_content(ct);
+
+ /*
+ ** Parse some of the header fields in the composition
+ ** draft into the linked list of header fields for
+ ** the new MIME message.
+ */
+ for (compnum = 1, state = FLD;;) {
+ switch (state = m_getfld(state, name, buf, sizeof(buf), in)) {
+ case FLD:
+ case FLDPLUS:
+ case FLDEOF:
+ compnum++;
+
+ /* abort if draft has Mime-Version header field */
+ if (!mh_strcasecmp(name, VRSN_FIELD))
+ adios(EX_CONFIG, NULL, "draft shouldn't contain %s: field", VRSN_FIELD);
+
+ /*
+ ** abort if draft has Content-Transfer-Encoding
+ ** header field
+ */
+ if (!mh_strcasecmp(name, ENCODING_FIELD))
+ adios(EX_CONFIG, NULL, "draft shouldn't contain %s: field", ENCODING_FIELD);
+
+ /* ignore any Content-Type fields in the header */
+ if (!mh_strcasecmp(name, TYPE_FIELD)) {
+ while (state == FLDPLUS)
+ state = m_getfld(state, name, buf,
+ sizeof(buf), in);
+ goto finish_field;
+ }
+
+ /* get copies of the buffers */
+ np = getcpy(name);
+ vp = getcpy(buf);
+
+ /* if necessary, get rest of field */
+ while (state == FLDPLUS) {
+ state = m_getfld(state, name, buf,
+ sizeof(buf), in);
+ vp = add(buf, vp); /* add to prev value */
+ }
+
+ /* Now add the header data to the list */
+ add_header(ct, np, vp);
+
+finish_field:
+ /* if this wasn't the last hdr field, then continue */
+ if (state != FLDEOF)
+ continue;
+ /* else fall... */
+
+ case FILEEOF:
+ adios(EX_CONFIG, NULL, "draft has empty body -- no directives!");
+ /* NOTREACHED */
+
+ case BODY:
+ case BODYEOF:
+ fseek(in, (long) (-strlen(buf)), SEEK_CUR);
+ break;
+
+ case LENERR:
+ case FMTERR:
+ adios(EX_CONFIG, NULL, "message format error in component #%d",
+ compnum);
+
+ default:
+ adios(EX_SOFTWARE, NULL, "getfld() returned %d", state);
+ }
+ break;
+ }
+
+ /*
+ ** Now add the MIME-Version header field
+ ** to the list of header fields.
+ */
+ np = getcpy(VRSN_FIELD);
+ vp = concat(" ", VRSN_VALUE, "\n", NULL);
+ add_header(ct, np, vp);
+
+ /*
+ ** We initally assume we will find multiple contents in the
+ ** draft. So create a multipart/mixed content to hold everything.
+ ** We can remove this later, if it is not needed.
+ */
+ if (get_ctinfo("multipart/mixed", ct, 0) == NOTOK) {
+ exit(EX_DATAERR);
+ }
+ ct->c_type = CT_MULTIPART;
+ ct->c_subtype = MULTI_MIXED;
+ ct->c_file = getcpy(infile);
+
+ if ((m = (struct multipart *) calloc(1, sizeof(*m))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ ct->c_ctparams = (void *) m;
+ pp = &m->mp_parts;
+
+ /*
+ ** read and parse the composition file
+ ** and the directives it contains.
+ */
+ while (fgetstr(buf, sizeof(buf) - 1, in)) {
+ struct part *part;
+ CT p;
+
+ if (user_content(in, infile, buf, &p) == DONE) {
+ admonish(NULL, "ignoring spurious #end");
+ continue;
+ }
+ if (!p)
+ continue;
+
+ if ((part = (struct part *) calloc(1, sizeof(*part))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ *pp = part;
+ pp = &part->mp_next;
+ part->mp_part = p;
+ }
+
+ /*
+ ** close the composition draft since
+ ** it's not needed any longer.
+ */
+ fclose(in);
+
+ /* check if any contents were found */
+ if (!m->mp_parts)
+ adios(EX_OSERR, NULL, "no content directives found");
+
+ /*
+ ** If only one content was found, then remove and
+ ** free the outer multipart content.
+ */
+ if (!m->mp_parts->mp_next) {
+ CT p;
+
+ p = m->mp_parts->mp_part;
+ m->mp_parts->mp_part = NULL;
+
+ /* move header fields */
+ p->c_first_hf = ct->c_first_hf;
+ p->c_last_hf = ct->c_last_hf;
+ ct->c_first_hf = NULL;
+ ct->c_last_hf = NULL;
+
+ free_content(ct);
+ ct = p;
+ } else {
+ set_id(ct, 1);
+ }
+
+ /*
+ ** Fill out, or expand directives. Parse and execute
+ ** commands specified by profile composition strings.
+ */
+ compose_content(ct);
+
+ if ((cp = strchr(prefix, 'a')) == NULL)
+ adios(EX_SOFTWARE, NULL, "internal error(4)");
+
+ /*
+ ** Scan the contents. Choose a transfer encoding, and
+ ** check if prefix for multipart boundary clashes with
+ ** any of the contents.
+ */
+ while (scan_content(ct) == NOTOK) {
+ if (*cp < 'z') {
+ (*cp)++;
+ } else {
+ if (*++cp == 0)
+ adios(EX_SOFTWARE, NULL, "giving up trying to find a unique delimiter string");
+ else
+ (*cp)++;
+ }
+ }
+
+ /* Build the rest of the header field structures */
+ build_headers(ct);
+
+ return ct;
+}
+
+
+/*
+** Set up structures for placing unencoded
+** content when building parts.
+*/
+
+static int
+init_decoded_content(CT ct)
+{
+ CE ce;
+
+ if ((ce = (CE) calloc(1, sizeof(*ce))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+
+ ct->c_cefile = ce;
+ ct->c_ceopenfnx = open7Bit; /* since unencoded */
+ ct->c_ceclosefnx = close_encoding;
+ ct->c_cesizefnx = NULL; /* since unencoded */
+
+ return OK;
+}
+
+
+static char *
+fgetstr(char *s, int n, FILE *stream)
+{
+ char *cp, *ep;
+
+ for (ep = (cp = s) + n; cp < ep; ) {
+ int i;
+
+ if (!fgets(cp, n, stream))
+ return (cp != s ? s : NULL);
+ if (cp == s && *cp != '#')
+ return s;
+
+ cp += (i = strlen(cp)) - 1;
+ if (i <= 1 || *cp-- != '\n' || *cp != '\\')
+ break;
+ *cp = '\0';
+ n -= (i - 2);
+ }
+
+ return s;
+}
+
+
+/*
+** Parse the composition draft for text and directives.
+** Do initial setup of Content structure.
+*/
+
+static int
+user_content(FILE *in, char *file, char *buf, CT *ctp)
+{
+ int vrsn;
+ unsigned char *cp;
+ char **ap;
+ char buffer[BUFSIZ];
+ struct multipart *m;
+ struct part **pp;
+ struct str2init *s2i;
+ CI ci;
+ CT ct;
+ CE ce;
+
+ if (buf[0] == '\n' || strcmp(buf, "#\n") == 0) {
+ *ctp = NULL;
+ return OK;
+ }
+
+ /* allocate basic Content structure */
+ if ((ct = (CT) calloc(1, sizeof(*ct))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ *ctp = ct;
+
+ /* allocate basic structure for handling decoded content */
+ init_decoded_content(ct);
+ ce = ct->c_cefile;
+
+ ci = &ct->c_ctinfo;
+ set_id(ct, 0);
+
+ /*
+ ** Handle inline text. Check if line
+ ** is one of the following forms:
+ **
+ ** 1) doesn't begin with '#' (implicit directive)
+ ** 2) begins with "##" (implicit directive)
+ ** 3) begins with "#<"
+ */
+ if (buf[0] != '#' || buf[1] == '#' || buf[1] == '<') {
+ int headers;
+ int inlineD;
+ long pos;
+ char content[BUFSIZ];
+ FILE *out;
+ char *cp;
+
+ cp = m_mktemp2(NULL, invo_name, NULL, &out);
+ if (cp == NULL)
+ adios(EX_CANTCREAT, "mhbuild", "unable to create temporary file");
+
+ /* use a temp file to collect the plain text lines */
+ ce->ce_file = getcpy(cp);
+ ce->ce_unlink = 1;
+
+ if (buf[0] == '#' && buf[1] == '<') {
+ strncpy(content, buf + 2, sizeof(content));
+ inlineD = 1;
+ goto rock_and_roll;
+ } else {
+ inlineD = 0;
+ }
+
+ /* the directive is implicit */
+ strncpy(content, "text/plain", sizeof(content));
+ headers = 0;
+ strncpy(buffer, buf[0] != '#' ? buf : buf + 1, sizeof(buffer));
+ for (;;) {
+ int i;
+
+ if (headers >= 0 && uprf(buffer, DESCR_FIELD) &&
+ buffer[i=strlen(DESCR_FIELD)] == ':') {
+ headers = 1;
+
+again_descr:
+ ct->c_descr = add(buffer + i + 1, ct->c_descr);
+ if (!fgetstr(buffer, sizeof(buffer) - 1, in))
+ adios(EX_DATAERR, NULL, "end-of-file after %s: field in plaintext", DESCR_FIELD);
+ switch (buffer[0]) {
+ case ' ':
+ case '\t':
+ i = -1;
+ goto again_descr;
+
+ case '#':
+ adios(EX_DATAERR, NULL, "#-directive after %s: field in plaintext", DESCR_FIELD);
+ /* NOTREACHED */
+
+ default:
+ break;
+ }
+ }
+
+ if (headers >= 0 && uprf(buffer, DISPO_FIELD)
+ && buffer[i = strlen(DISPO_FIELD)] == ':') {
+ headers = 1;
+
+again_dispo:
+ ct->c_dispo = add(buffer + i + 1, ct->c_dispo);
+ if (!fgetstr(buffer, sizeof(buffer) - 1, in))
+ adios(EX_DATAERR, NULL, "end-of-file after %s: field in plaintext", DISPO_FIELD);
+ switch (buffer[0]) {
+ case ' ':
+ case '\t':
+ i = -1;
+ goto again_dispo;
+
+ case '#':
+ adios(EX_DATAERR, NULL, "#-directive after %s: field in plaintext", DISPO_FIELD);
+ /* NOTREACHED */
+
+ default:
+ break;
+ }
+ }
+
+ if (headers != 1 || buffer[0] != '\n')
+ fputs(buffer, out);
+
+rock_and_roll:
+ headers = -1;
+ pos = ftell(in);
+ if ((cp = fgetstr(buffer, sizeof(buffer) - 1, in))
+ == NULL)
+ break;
+ if (buffer[0] == '#') {
+ char *bp;
+
+ if (buffer[1] != '#')
+ break;
+ for (cp = (bp = buffer) + 1; *cp; cp++)
+ *bp++ = *cp;
+ *bp = '\0';
+ }
+ }
+
+ fclose(out);
+
+ /* parse content type */
+ if (get_ctinfo(content, ct, inlineD) == NOTOK)
+ exit(EX_DATAERR);
+
+ for (s2i = str2cts; s2i->si_key; s2i++)
+ if (!mh_strcasecmp(ci->ci_type, s2i->si_key))
+ break;
+ if (!s2i->si_key && !uprf(ci->ci_type, "X-"))
+ s2i++;
+
+ /*
+ ** check type specified (possibly implicitly)
+ */
+ switch (ct->c_type = s2i->si_val) {
+ case CT_MESSAGE:
+ if (!mh_strcasecmp(ci->ci_subtype, "rfc822")) {
+ ct->c_encoding = CE_7BIT;
+ goto call_init;
+ }
+ /* else fall... */
+ case CT_MULTIPART:
+ adios(EX_DATAERR, NULL, "it doesn't make sense to define an in-line %s content",
+ ct->c_type == CT_MESSAGE ? "message" :
+ "multipart");
+ /* NOTREACHED */
+
+ default:
+call_init:
+ if ((ct->c_ctinitfnx = s2i->si_init))
+ (*ct->c_ctinitfnx) (ct);
+ break;
+ }
+
+ if (cp)
+ fseek(in, pos, SEEK_SET);
+ return OK;
+ }
+
+ /*
+ ** If we've reached this point, the next line
+ ** must be some type of explicit directive.
+ */
+
+ if (buf[1] == '@') {
+ adios(EX_DATAERR, NULL, "The #@ directive i.e. message/external-body "
+ "is not supported anymore.");
+ }
+
+ /* parse directive */
+ if (get_ctinfo(buf+1, ct, 1) == NOTOK)
+ exit(EX_DATAERR);
+
+ /* check directive against the list of MIME types */
+ for (s2i = str2cts; s2i->si_key; s2i++)
+ if (!mh_strcasecmp(ci->ci_type, s2i->si_key))
+ break;
+
+ /*
+ ** Check if the directive specified a valid type.
+ ** This will happen if it was one of the following forms:
+ **
+ ** #type/subtype
+ */
+ if (s2i->si_key) {
+ if (!ci->ci_subtype)
+ adios(EX_DATAERR, NULL, "missing subtype in \"#%s\"", ci->ci_type);
+
+ switch (ct->c_type = s2i->si_val) {
+ case CT_MULTIPART:
+ adios(EX_DATAERR, NULL, "use \"#begin ... #end\" instead of \"#%s/%s\"", ci->ci_type, ci->ci_subtype);
+ /* NOTREACHED */
+
+ case CT_MESSAGE:
+ if (!mh_strcasecmp(ci->ci_subtype, "partial") ||
+ !mh_strcasecmp(ci->ci_subtype,
+ "external-body")) {
+ adios(EX_DATAERR, NULL, "sorry, \"#%s/%s\" isn't supported", ci->ci_type, ci->ci_subtype);
+ }
+use_forw:
+ admonish(NULL, "use \"#forw [+folder] [msgs]\" instead of \"#%s/%s\"", ci->ci_type, ci->ci_subtype);
+ /* FALL */
+
+ default:
+ if ((ct->c_ctinitfnx = s2i->si_init))
+ (*ct->c_ctinitfnx) (ct);
+ break;
+ }
+
+ /* Handle [file] argument */
+ if (ci->ci_magic) {
+ /* check if specifies command to execute */
+ if (*ci->ci_magic == '|' || *ci->ci_magic == '!') {
+ for (cp = ci->ci_magic + 1; isspace(*cp); cp++)
+ continue;
+ if (!*cp)
+ adios(EX_DATAERR, NULL, "empty pipe command for #%s directive", ci->ci_type);
+ cp = getcpy(cp);
+ free(ci->ci_magic);
+ ci->ci_magic = cp;
+ } else {
+ /* record filename of decoded contents */
+ ce->ce_file = ci->ci_magic;
+ if (access(ce->ce_file, R_OK) == NOTOK)
+ adios(EX_IOERR, "reading", "unable to access %s for", ce->ce_file);
+ ci->ci_magic = NULL;
+ }
+ return OK;
+ }
+
+ /*
+ ** No [file] argument, so check profile for
+ ** method to compose content.
+ */
+ snprintf(buffer, sizeof(buffer), "%s-compose-%s/%s",
+ invo_name, ci->ci_type, ci->ci_subtype);
+ if ((cp = context_find(buffer)) == NULL || *cp == '\0') {
+ snprintf(buffer, sizeof(buffer), "%s-compose-%s",
+ invo_name, ci->ci_type);
+ if ((cp = context_find(buffer)) == NULL ||
+ *cp == '\0') {
+ content_error(NULL, ct, "don't know how to compose content");
+ exit(EX_CONFIG);
+ }
+ }
+ ci->ci_magic = getcpy(cp);
+ return OK;
+ }
+
+ /*
+ ** Message directive
+ ** #forw [+folder] [msgs]
+ */
+ if (!mh_strcasecmp(ci->ci_type, "forw")) {
+ int msgnum;
+ char *folder, *arguments[MAXARGS];
+ struct msgs *mp;
+
+ if (ci->ci_magic) {
+ int i;
+
+ ap = brkstring(ci->ci_magic, " ", "\n");
+ for (i=0; ap[i] && i<MAXARGS-1; i++) {
+ arguments[i] = ap[i];
+ }
+ arguments[i] = NULL;
+
+ } else {
+ arguments[0] = seq_cur;
+ arguments[1] = NULL;
+ }
+ folder = NULL;
+
+ /* search the arguments for a folder name */
+ for (ap = arguments; *ap; ap++) {
+ cp = *ap;
+ if (*cp == '+' || *cp == '@') {
+ if (folder)
+ adios(EX_USAGE, NULL, "only one folder per #forw directive");
+ else
+ folder = getcpy(expandfol(cp));
+ }
+ }
+
+ /* else, use the current folder */
+ if (!folder)
+ folder = getcpy(getcurfol());
+
+ if (!(mp = folder_read(folder)))
+ adios(EX_IOERR, NULL, "unable to read folder %s", folder);
+ for (ap = arguments; *ap; ap++) {
+ cp = *ap;
+ if (*cp != '+' && *cp != '@')
+ if (!m_convert(mp, cp))
+ exit(EX_USAGE);
+ }
+ free(folder);
+ free_ctinfo(ct);
+
+ /*
+ ** If there is more than one message to include, make this
+ ** a content of type "multipart/digest" and insert each message
+ ** as a subpart. If there is only one message, then make this
+ ** a content of type "message/rfc822".
+ */
+ if (mp->numsel > 1) {
+ /* we are forwarding multiple messages */
+ if (get_ctinfo("multipart/digest", ct, 0) == NOTOK)
+ exit(EX_DATAERR);
+ ct->c_type = CT_MULTIPART;
+ ct->c_subtype = MULTI_DIGEST;
+
+ if ((m = (struct multipart *)
+ calloc(1, sizeof(*m))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ ct->c_ctparams = (void *) m;
+ pp = &m->mp_parts;
+
+ for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
+ if (is_selected(mp, msgnum)) {
+ struct part *part;
+ CT p;
+ CE pe;
+
+ if ((p = (CT) calloc(1, sizeof(*p)))
+ == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ init_decoded_content(p);
+ pe = p->c_cefile;
+ if (get_ctinfo("message/rfc822", p, 0)
+ == NOTOK)
+ exit(EX_DATAERR);
+ p->c_type = CT_MESSAGE;
+ p->c_subtype = MESSAGE_RFC822;
+
+ snprintf(buffer, sizeof(buffer),
+ "%s/%d", mp->foldpath,
+ msgnum);
+ pe->ce_file = getcpy(buffer);
+
+ if ((part = (struct part *) calloc(1, sizeof(*part))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ *pp = part;
+ pp = &part->mp_next;
+ part->mp_part = p;
+ }
+ }
+ } else {
+ /* we are forwarding one message */
+ if (get_ctinfo("message/rfc822", ct, 0) == NOTOK)
+ exit(EX_DATAERR);
+ ct->c_type = CT_MESSAGE;
+ ct->c_subtype = MESSAGE_RFC822;
+
+ msgnum = mp->lowsel;
+ snprintf(buffer, sizeof(buffer), "%s/%d",
+ mp->foldpath, msgnum);
+ ce->ce_file = getcpy(buffer);
+ }
+
+ folder_free(mp); /* free folder/message structure */
+ return OK;
+ }
+
+ /*
+ ** #end
+ */
+ if (!mh_strcasecmp(ci->ci_type, "end")) {
+ free_content(ct);
+ *ctp = NULL;
+ return DONE;
+ }
+
+ /*
+ ** #begin [ alternative | parallel ]
+ */
+ if (!mh_strcasecmp(ci->ci_type, "begin")) {
+ if (!ci->ci_magic) {
+ vrsn = MULTI_MIXED;
+ cp = SubMultiPart[vrsn - 1].kv_key;
+ } else if (!mh_strcasecmp(ci->ci_magic, "alternative")) {
+ vrsn = MULTI_ALTERNATE;
+ cp = SubMultiPart[vrsn - 1].kv_key;
+ } else if (!mh_strcasecmp(ci->ci_magic, "parallel")) {
+ vrsn = MULTI_PARALLEL;
+ cp = SubMultiPart[vrsn - 1].kv_key;
+ } else if (uprf(ci->ci_magic, "digest")) {
+ goto use_forw;
+ } else {
+ vrsn = MULTI_UNKNOWN;
+ cp = ci->ci_magic;
+ }
+
+ free_ctinfo(ct);
+ snprintf(buffer, sizeof(buffer), "multipart/%s", cp);
+ if (get_ctinfo(buffer, ct, 0) == NOTOK)
+ exit(EX_DATAERR);
+ ct->c_type = CT_MULTIPART;
+ ct->c_subtype = vrsn;
+
+ if ((m = (struct multipart *) calloc(1, sizeof(*m))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ ct->c_ctparams = (void *) m;
+
+ pp = &m->mp_parts;
+ while (fgetstr(buffer, sizeof(buffer) - 1, in)) {
+ struct part *part;
+ CT p;
+
+ if (user_content(in, file, buffer, &p) == DONE) {
+ if (!m->mp_parts)
+ adios(EX_DATAERR, NULL, "empty \"#begin ... #end\" sequence");
+ return OK;
+ }
+ if (!p)
+ continue;
+
+ if ((part = (struct part *)
+ calloc(1, sizeof(*part))) == NULL)
+ adios(EX_OSERR, NULL, "out of memory");
+ *pp = part;
+ pp = &part->mp_next;
+ part->mp_part = p;
+ }
+ admonish(NULL, "premature end-of-file, missing #end");
+ return OK;
+ }
+
+ /*
+ ** Unknown directive
+ */
+ adios(EX_DATAERR, NULL, "unknown directive \"#%s\"", ci->ci_type);
+ return NOTOK; /* NOT REACHED */
+}
+
+
+static void
+set_id(CT ct, int top)
+{
+ char msgid[BUFSIZ];
+ static int partno;
+ static time_t clock = 0;
+ static char *msgfmt;
+
+ if (clock == 0) {
+ time(&clock);
+ snprintf(msgid, sizeof(msgid), "<%d.%ld.%%d@%s>\n",
+ (int) getpid(), (long) clock, LocalName());
+ partno = 0;
+ msgfmt = getcpy(msgid);
+ }
+ snprintf(msgid, sizeof(msgid), msgfmt, top ? 0 : ++partno);
+ ct->c_id = getcpy(msgid);
+}
+
+
+/*
+** Fill out, or expand the various contents in the composition
+** draft. Read-in any necessary files. Parse and execute any
+** commands specified by profile composition strings.
+*/
+
+static int
+compose_content(CT ct)
+{
+ CE ce = ct->c_cefile;
+
+ switch (ct->c_type) {
+ case CT_MULTIPART:
+ {
+ int partnum;
+ char *pp;
+ char partnam[BUFSIZ];
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ if (ct->c_partno) {
+ snprintf(partnam, sizeof(partnam), "%s.",
+ ct->c_partno);
+ pp = partnam + strlen(partnam);
+ } else {
+ pp = partnam;
+ }
+
+ /* first, we call compose_content on all the subparts */
+ for (part = m->mp_parts, partnum = 1; part;
+ part = part->mp_next, partnum++) {
+ CT p = part->mp_part;
+
+ sprintf(pp, "%d", partnum);
+ p->c_partno = getcpy(partnam);
+ if (compose_content(p) == NOTOK)
+ return NOTOK;
+ }
+ }
+ break;
+
+ case CT_MESSAGE:
+ /* Nothing to do for type message */
+ break;
+
+ /*
+ ** Discrete types (text/application/audio/image/video)
+ */
+ default:
+ if (!ce->ce_file) {
+ pid_t child_id;
+ int xstdout, len, buflen;
+ char *bp, **ap, *cp;
+ char *vec[4], buffer[BUFSIZ];
+ FILE *out;
+ CI ci = &ct->c_ctinfo;
+ char *tfile = NULL;
+
+ if (!(cp = ci->ci_magic))
+ adios(EX_SOFTWARE, NULL, "internal error(5)");
+
+ tfile = m_mktemp2(NULL, invo_name, NULL, NULL);
+ if (tfile == NULL) {
+ adios(EX_CANTCREAT, "mhbuild", "unable to create temporary file");
+ }
+ ce->ce_file = getcpy(tfile);
+ ce->ce_unlink = 1;
+
+ xstdout = 0;
+
+ /* Get buffer ready to go */
+ bp = buffer;
+ bp[0] = '\0';
+ buflen = sizeof(buffer);
+
+ /*
+ ** Parse composition string into buffer
+ */
+ for ( ; *cp; cp++) {
+ if (*cp == '%') {
+ switch (*++cp) {
+ case 'a':
+ {
+ /*
+ ** insert parameters from
+ ** directive
+ */
+ char **ep;
+ char *s = "";
+
+ for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
+ snprintf(bp, buflen, "%s%s=\"%s\"", s, *ap, *ep);
+ len = strlen(bp);
+ bp += len;
+ buflen -= len;
+ s = " ";
+ }
+ }
+ break;
+
+ case 'F':
+ /* %f, and stdout is not-redirected */
+ xstdout = 1;
+ /* and fall... */
+
+ case 'f':
+ /*
+ ** insert temporary filename
+ ** where content should be
+ ** written
+ */
+ snprintf(bp, buflen, "%s", ce->ce_file);
+ break;
+
+ case 's':
+ /* insert content subtype */
+ strncpy(bp, ci->ci_subtype, buflen);
+ break;
+
+ case '%':
+ /* insert character % */
+ goto raw;
+
+ default:
+ *bp++ = *--cp;
+ *bp = '\0';
+ buflen--;
+ continue;
+ }
+ len = strlen(bp);
+ bp += len;
+ buflen -= len;
+ } else {
+raw:
+ *bp++ = *cp;
+ *bp = '\0';
+ buflen--;
+ }
+ }
+
+ if (verbosw)
+ printf("composing content %s/%s from command\n\t%s\n", ci->ci_type, ci->ci_subtype, buffer);
+
+ fflush(stdout); /* not sure if need for -noverbose */
+
+ vec[0] = "/bin/sh";
+ vec[1] = "-c";
+ vec[2] = buffer;
+ vec[3] = NULL;
+
+ if ((out = fopen(ce->ce_file, "w")) == NULL)
+ adios(EX_IOERR, ce->ce_file, "unable to open for writing");
+
+ switch (child_id = fork()) {
+ case NOTOK:
+ adios(EX_OSERR, "fork", "unable to fork");
+ /* NOTREACHED */
+
+ case OK:
+ if (!xstdout)
+ dup2(fileno(out), 1);
+ close(fileno(out));
+ execvp("/bin/sh", vec);
+ fprintf(stderr, "unable to exec ");
+ perror("/bin/sh");
+ _exit(EX_OSERR);
+ /* NOTREACHED */
+
+ default:
+ fclose(out);
+ if (pidXwait(child_id, NULL))
+ exit(EX_SOFTWARE);
+ break;
+ }
+ }
+ break;
+ }
+
+ return OK;
+}
+
+
+/*
+** Scan the content.
+**
+** 1) choose a transfer encoding.
+** 2) check for clashes with multipart boundary string.
+** 3) for text content, figure out which character set is being used.
+**
+** If there is a clash with one of the contents and the multipart boundary,
+** this function will exit with NOTOK. This will cause the scanning process
+** to be repeated with a different multipart boundary. It is possible
+** (although highly unlikely) that this scan will be repeated multiple times.
+*/
+
+static int
+scan_content(CT ct)
+{
+ int len;
+ int check8bit = 0, contains8bit = 0;
+ int checklinelen = 0, linelen = 0;
+ int checkboundary = 0, boundaryclash = 0;
+ int checklinespace = 0, linespace = 0; /* trailing whitespace */
+ unsigned char *cp = NULL, buffer[BUFSIZ];
+ struct text *t = NULL;
+ FILE *in = NULL;
+ CE ce = ct->c_cefile;
+
+ /*
+ ** handle multipart by scanning all subparts
+ ** and then checking their encoding.
+ */
+ if (ct->c_type == CT_MULTIPART) {
+ struct multipart *m = (struct multipart *) ct->c_ctparams;
+ struct part *part;
+
+ /* initially mark the domain of enclosing multipart as 7bit */
+ ct->c_encoding = CE_7BIT;
+
+ for (part = m->mp_parts; part; part = part->mp_next) {
+ CT p = part->mp_part;
+
+ if (scan_content(p) == NOTOK) {
+ /* choose encoding for subpart */
+ return NOTOK;
+ }
+
+ /*
+ ** if necessary, enlarge encoding for enclosing
+ ** multipart
+ */
+ if (p->c_encoding == CE_BINARY)
+ ct->c_encoding = CE_BINARY;
+ if (p->c_encoding == CE_8BIT &&
+ ct->c_encoding != CE_BINARY)
+ ct->c_encoding = CE_8BIT;
+ }
+
+ return OK;
+ }
+
+ /*
+ ** Decide what to check while scanning this content.
+ */
+ switch (ct->c_type) {
+ case CT_TEXT:
+ check8bit = 1;
+ checkboundary = 1;
+ if (ct->c_subtype == TEXT_PLAIN) {
+ checklinelen = 0;
+ checklinespace = 0;
+ } else {
+ checklinelen = 1;
+ checklinespace = 1;
+ }
+ break;
+
+ case CT_MESSAGE:
+ check8bit = 0;
+ checklinelen = 0;
+ checklinespace = 0;
+ checkboundary = 1;
+ break;
+
+ case CT_APPLICATION:
+ case CT_AUDIO:
+ case CT_IMAGE:
+ case CT_VIDEO:
+ check8bit = 0;
+ checklinelen = 0;
+ checklinespace = 0;
+ checkboundary = 0;
+ break;
+ }
+
+ /*
+ ** Scan the unencoded content
+ */
+ if (check8bit || checklinelen || checklinespace || checkboundary) {
+ if ((in = fopen(ce->ce_file, "r")) == NULL)
+ adios(EX_IOERR, ce->ce_file, "unable to open for reading");
+ len = strlen(prefix);
+
+ while (fgets(buffer, sizeof(buffer) - 1, in)) {
+ if (check8bit) {
+ for (cp = buffer; *cp; cp++) {
+ if (!isascii(*cp)) {
+ contains8bit = 1;
+ /* no need to keep checking */
+ check8bit = 0;
+ }
+ }
+ }
+
+ if (checklinelen && (strlen(buffer) > CPERLIN + 1)) {
+ linelen = 1;
+ checklinelen = 0; /* no need to keep checking */
+ }
+
+ if (checklinespace &&
+ (cp = buffer + strlen(buffer) - 2) >
+ buffer && isspace(*cp)) {
+ linespace = 1;
+ /* no need to keep checking */
+ checklinespace = 0;
+ }
+
+ /*
+ ** Check if content contains a line that clashes
+ ** with our standard boundary for multipart messages.
+ */
+ if (checkboundary && buffer[0] == '-' &&
+ buffer[1] == '-') {
+ for (cp = buffer + strlen(buffer) - 1;
+ cp >= buffer; cp--)
+ if (!isspace(*cp))
+ break;
+ *++cp = '\0';
+ if (strncmp(buffer + 2, prefix, len)==0 &&
+ isdigit(buffer[2 + len])) {
+ boundaryclash = 1;
+ /* no need to keep checking */
+ checkboundary = 0;
+ }
+ }
+ }
+ fclose(in);
+ }
+
+ /*
+ ** Decide which transfer encoding to use.
+ */
+ switch (ct->c_type) {
+ case CT_TEXT:
+ /*
+ ** If the text content didn't specify a character
+ ** set, we need to figure out which one was used.
+ */
+ t = (struct text *) ct->c_ctparams;
+ if (t->tx_charset == CHARSET_UNSPECIFIED) {
+ CI ci = &ct->c_ctinfo;
+ char **ap, **ep;
+
+ for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++)
+ continue;
+
+ if (contains8bit) {
+ t->tx_charset = CHARSET_UNKNOWN;
+ *ap = concat("charset=", write_charset_8bit(),
+ NULL);
+ } else {
+ t->tx_charset = CHARSET_USASCII;
+ *ap = getcpy("charset=us-ascii");
+ }
+
+ cp = strchr(*ap++, '=');
+ *ap = NULL;
+ *cp++ = '\0';
+ *ep = cp;
+ }
+
+ if (contains8bit || linelen || linespace)
+ ct->c_encoding = CE_QUOTED;
+ else
+ ct->c_encoding = CE_7BIT;
+ break;
+
+ case CT_MESSAGE:
+ ct->c_encoding = CE_7BIT;
+ break;
+
+ case CT_APPLICATION:
+ case CT_AUDIO:
+ case CT_IMAGE:
+ case CT_VIDEO:
+ /*
+ ** Forcing use of base64, because these types likely
+ ** contain binary data and NUL bytes. Don't care about
+ ** files that would be clean.
+ */
+ ct->c_encoding = CE_BASE64;
+ break;
+ }
+
+ return (boundaryclash ? NOTOK : OK);
+}
+
+
+/*
+** Scan the content structures, and build header
+** fields that will need to be output into the
+** message.
+*/
+
+static int
+build_headers(CT ct)