/*
 * $LynxId: LYMail.c,v 1.99 2018/03/18 19:16:29 tom Exp $
 */
#include <HTUtils.h>
#include <HTParse.h>
#include <LYGlobalDefs.h>
#include <HTAlert.h>
#include <LYCurses.h>
#include <LYSignal.h>
#include <LYUtils.h>
#include <LYClean.h>
#include <LYStrings.h>
#include <GridText.h>
#include <LYMail.h>
#include <LYEdit.h>
#include <LYCharSets.h>		/* to get current charset for mail header */

#include <LYLeaks.h>

#define MAX_SUBJECT 70

BOOLEAN term_letter;		/* Global variable for async i/o. */

static void terminate_letter(int sig GCC_UNUSED)
{
    term_letter = TRUE;
    /* Reassert the AST */
    signal(SIGINT, terminate_letter);
#if USE_VMS_MAILER || defined(PDCURSES)
    /*
     * Refresh the screen to get rid of the "interrupt" message.
     */
    if (!dump_output_immediately) {
	lynx_force_repaint();
	LYrefresh();
    }
#endif /* VMS */
}

/* HTUnEscape with control-code nuking */
static void SafeHTUnEscape(char *string)
{
    int i;
    int flg = FALSE;

    HTUnEscape(string);
    for (i = 0; string[i] != '\0'; i++) {
	/* FIXME: this is no longer explicitly 7-bit ASCII,
	   but are there portability problems? */
	if ((!LYIsASCII(string[i])) || !isprint(UCH(string[i]))) {
	    string[i] = '?';
	    flg = TRUE;
	}
    }
    if (flg)
	HTAlert(MAILTO_SQUASH_CTL);
}

static void remove_tildes(char *string)
{
    /*
     * Change the first character to a space if it is a '~'.
     */
    if (*string == '~')
	*string = ' ';
}

static void comma_append(char **dst,
			 char *src)
{
    if (*src) {
	while (*src == ',' || isspace(UCH(*src)))
	    src++;
	if (*src) {
	    if (isEmpty(*dst)) {
		StrAllocCopy(*dst, src);
	    } else {
		StrAllocCat(*dst, ",");
		StrAllocCat(*dst, src);
	    }
	}
    }
}

static void extract_field(char **dst,
			  char *src,
			  const char *keyword)
{
    int len = (int) strlen(keyword);
    char *cp, *cp1;

    cp = (src + 1);
    while (*cp != '\0') {
	if ((*(cp - 1) == '?' || *(cp - 1) == '&') &&
	    !strncasecomp(cp, keyword, len)) {
	    cp += len;
	    if ((cp1 = StrChr(cp, '&')) != NULL) {
		*cp1 = '\0';
	    }
	    comma_append(dst, cp);
	    if (cp1) {
		*cp1 = '&';
		cp = cp1;
		cp1 = NULL;
	    } else {
		break;
	    }
	}
	cp++;
    }
    CTRACE((tfp, "extract_field(%s) = '%s'\n", keyword, *dst));
}

/*
 * Seek and handle a subject=foo.  - FM
 */
static void extract_subject(char *dst,
			    char *src)
{
    const char *keyword = "subject=";
    int len = (int) strlen(keyword);
    char *cp, *cp1;

    cp = (src + 1);
    while (*cp != '\0') {
	if ((*(cp - 1) == '?' || *(cp - 1) == '&') &&
	    !strncasecomp(cp, keyword, len))
	    break;
	cp++;
    }
    if (*cp) {
	cp += len;
	if ((cp1 = StrChr(cp, '&')) != NULL) {
	    *cp1 = '\0';
	}
	if (*cp) {
	    LYStrNCpy(dst, cp, MAX_SUBJECT);
	    SafeHTUnEscape(dst);
	}
	if (cp1) {
	    *cp1 = '&';
	    cp1 = NULL;
	}
    }
    CTRACE((tfp, "extract_subject(%s) = '%s'\n", keyword, NONNULL(dst)));
}

/*
 * Seek and handle body=foo fields.  - FM
 */
static void extract_body(char **dst,
			 char *src)
{
    const char *keyword = "body=";
    int len = (int) strlen(keyword);
    int i;
    char *cp, *cp0, *cp1, *temp = 0;

    cp = (src + 1);
    while (*cp != '\0') {
	if ((*(cp - 1) == '?' || *(cp - 1) == '&') &&
	    !strncasecomp(cp, keyword, len)) {
	    cp += len;
	    if ((cp1 = StrChr(cp, '&')) != NULL) {
		*cp1 = '\0';
	    }
	    if (*cp) {
		/*
		 * Break up the value into lines with a maximum length of 78. 
		 * - FM
		 */
		StrAllocCopy(temp, cp);
		HTUnEscape(temp);
		cp0 = temp;
		while ((cp = StrChr(cp0, '\n')) != NULL) {
		    *cp = '\0';
		    if (cp > cp0) {
			if (*(cp - 1) == '\r') {
			    *(cp - 1) = '\0';
			}
		    }
		    i = 0;
		    len = (int) strlen(cp0);
		    while (len > 78) {
			HTSprintf(dst, "%.78s\n", &cp0[i]);
			i += 78;
			len = (int) strlen(&cp0[i]);
		    }
		    HTSprintf(dst, "%s\n", &cp0[i]);
		    cp0 = (cp + 1);
		}
		i = 0;
		len = (int) strlen(cp0);
		while (len > 78) {
		    HTSprintf(dst, "%.78s\n", &cp0[i]);
		    i += 78;
		    len = (int) strlen(&cp0[i]);
		}
		if (len) {
		    HTSprintf(dst, "%s\n", &cp0[i]);
		}
		FREE(temp);
	    }
	    if (cp1) {
		*cp1 = '&';
		cp = cp1;
		cp1 = NULL;
	    } else {
		break;
	    }
	}
	cp++;
    }
    CTRACE((tfp, "extract_body(%s) = '%s'\n", keyword, NONNULL(*dst)));
}

/*
 * Convert any Explorer semi-colon Internet address separators to commas - FM
 */
static BOOLEAN trim_comma(char *address)
{
    if (address[(strlen(address) - 1)] == ',')
	address[(strlen(address) - 1)] = '\0';
    return (BOOL) (*address == '\0');
}

/*
 * Convert any Explorer semi-colon Internet address separators to commas - FM
 */
static BOOLEAN convert_explorer(char *address)
{
    char *cp = address;
    char *cp0;
    char *cp1;

    while ((cp1 = StrChr(cp, '@')) != NULL) {
	cp1++;
	if ((cp0 = StrChr(cp1, ';')) != NULL) {
	    *cp0 = ',';
	    cp1 = cp0 + 1;
	}
	cp = cp1;
    }
    return trim_comma(address);
}

/*
 * reply_by_mail() prompts line-by-line for header information, allowing
 * scrolling of the screen.
 */
static int header_prompt(const char *label,
			 char **result,
			 unsigned limit)
{
    char buffer[LINESIZE];
    int ok;

    if (*result != 0) {
	LYaddstr(CTRL_U_TO_ERASE);
	LYStrNCpy(buffer, *result, sizeof(buffer) - 1);
    } else
	*buffer = 0;

    if (limit > sizeof(buffer))
	limit = sizeof(buffer);

    LYaddstr(gettext(label));
    LYaddstr(": ");
    ok = (LYGetStr(buffer, FALSE, limit, NORECALL) >= 0
	  && !term_letter);
    LYaddstr("\n");

    if (ok) {
	remove_tildes(buffer);
	StrAllocCopy(*result, buffer);
    }
    term_letter = FALSE;
    return ok;
}

static void show_addresses(char *addresses)
{
    char *cp = addresses;
    char *cp1;

    while ((cp1 = StrChr(cp, ',')) != NULL) {
	*cp1 = '\0';
	while (*cp == ' ')
	    cp++;
	if (*cp) {
	    LYaddstr(cp);
	    LYaddstr(",\n  ");
	}
	*cp1 = ',';
	cp = (cp1 + 1);
    }
    if (*cp) {
	LYaddstr(cp);
    }
}

#if USE_BLAT_MAILER

/*
 * blat's options-file parser (see makeargv.cpp) treats backslash and double
 * quote characters specially.  lynx doesn't.  Do a conversion as we write the
 * option.
 *
 * Other quirks (reading blat 3.06):
 * + Whitespace not in quotes terminates a line.
 * + Blat allows a comment-character to terminate a line.  By default, that
 *   is a semicolon.
 *
 * Given that, the simplest thing to do is to always quote the string, using
 * escaping to handle special cases.
 */
static void blat_option(FILE *fp, const char *option, const char *value)
{
    if (non_empty(value)) {
	char *result = malloc(strlen(option) + 4 + 4 * strlen(value));
	char *working = result;

	CTRACE((tfp, "blat_option(opt=\"%s\", value=\"%s\")\n", option, value));
	sprintf(working, "%s \"", option);
	working += strlen(working);

	while (*value != '\0') {
	    unsigned ch = UCH(*value);

	    switch (ch) {
	    case '\\':
		*working++ = '\\';
		*working++ = '\\';
		break;
	    case '"':
		*working++ = '\\';
		*working++ = '"';
		break;
	    default:
		if (ch < ' ' || ch > '~') {
		    sprintf(working, "\\%03o", ch);
		} else {
		    *working++ = ch;
		}
		break;
	    }
	    ++value;
	}
	*working++ = '"';
	*working++ = '\n';
	*working = 0;

	CTRACE((tfp, "->%s", result));
	fputs(result, fp);
	FREE(result);
    }
}

/*
syntax for blat 2.6.2:
Blat <filename> -t <recipient> [optional switches (see below)]

-bodyF <filename> : file with the message body
-t <recipient>    : recipient list (comma separated)
-s <subj>         : subject line
-f <sender>       : overrides the default sender address (must be known to server)
-i <addr>         : a 'From:' address, not necessarily known to the SMTP server.
-c <recipient>    : carbon copy recipient list (comma separated)
-b <recipient>    : blind carbon copy recipient list (comma separated)
-help             : displays the help message.
-mime             : MIME Quoted-Printable Content-Transfer-Encoding.
-q                : supresses *all* output.
-server <addr>    : overrides the default SMTP server to be used.

*/

static char *blat_cmd(char *filename,
		      char *address,
		      char *subject,
		      char *ccaddr,
		      char *mail_addr)
{
    char *b_cmd = NULL;

    if (mail_is_altblat) {
	const char *format = "%s %s -t %s -s %s %s%s%s";

	HTAddParam(&b_cmd, format, 1, ALTBLAT_MAIL);
	HTAddParam(&b_cmd, format, 2, filename);
	HTAddParam(&b_cmd, format, 3, address);
	HTAddParam(&b_cmd, format, 4, subject);
	HTAddToCmd(&b_cmd, format, 5, ALTBLAT_MAIL_FLAGS);
	if (non_empty(ccaddr)) {
	    HTAddToCmd(&b_cmd, format, 6, " -c ");
	    HTAddParam(&b_cmd, format, 7, NonNull(ccaddr));
	}
	HTEndParam(&b_cmd, format, 8);

    } else {

	const char *format = "%s -of %s";
	char bl_cmd_file[LY_MAXPATH];
	FILE *fp;

#ifdef __CYGWIN__
	char dosname[LY_MAXPATH];

#else
	char *dosname;
#endif

	bl_cmd_file[0] = '\0';
	if ((fp = LYOpenTemp(bl_cmd_file, ".blt", "w")) == NULL) {
	    HTAlert(FORM_MAILTO_FAILED);
	    return NULL;
	}

	HTAddParam(&b_cmd, format, 1, BLAT_MAIL);

	ConvertToWin32Path(filename, dosname);
	blat_option(fp, "-bodyF", dosname);
	blat_option(fp, "-t", address);
	blat_option(fp, "-s", subject);
	blat_option(fp, "-f", mail_addr);
	blat_option(fp, "-c", ccaddr);
	LYCloseOutput(fp);

	ConvertToWin32Path(bl_cmd_file, dosname);

	HTAddParam(&b_cmd, format, 2, dosname);
	HTEndParam(&b_cmd, format, 3);

    }

    return b_cmd;
}

#endif /* USE_BLAT_MAILER */

#if USE_VMS_MAILER
BOOLEAN LYMailPMDF(void)
{
    return (system_mail != 0)
	? !strncasecomp(system_mail, "PMDF SEND", 9)
	: FALSE;
}

/*
 * Add all of the people in the address field to the command
 */
static void vms_append_addrs(char **cmd, char *address, char *option)
{
    BOOLEAN first = TRUE;
    char *cp;
    char *address_ptr1;
    char *address_ptr2;

    address_ptr1 = address;
    do {
	if ((cp = StrChr(address_ptr1, ',')) != NULL) {
	    address_ptr2 = (cp + 1);
	    *cp = '\0';
	} else {
	    address_ptr2 = NULL;
	}

	/*
	 * 4 letters is arbitrarily the smallest possible mail address, at
	 * least for lynx.  That way extra spaces won't confuse the mailer and
	 * give a blank address.
	 */
	if (strlen(address_ptr1) > 3) {
	    if (!first) {
		StrAllocCat(*cmd, ",");
	    }
	    HTSprintf(cmd, mail_adrs, address_ptr1);
	    if (*option && LYMailPMDF())
		StrAllocCat(*cmd, option);
	    first = FALSE;
	}
	address_ptr1 = address_ptr2;
    } while (address_ptr1 != NULL);
}

static void remove_quotes(char *string)
{
    while (*string != 0) {
	if (StrChr("\"&|", *string) != 0)
	    *string = ' ';
	string++;
    }
}
#else
#if CAN_PIPE_TO_MAILER

/*
 * Open a pipe to the mailer
 */
FILE *LYPipeToMailer(void)
{
    char *buffer = NULL;
    FILE *fp = NULL;

    if (LYSystemMail()) {
	HTSprintf0(&buffer, "%s %s", system_mail, system_mail_flags);
	fp = popen(buffer, "w");
	CTRACE((tfp, "popen(%s) %s\n", buffer, fp != 0 ? "OK" : "FAIL"));
	FREE(buffer);
    }
    return fp;
}
#else /* DOS, Win32, etc. */

int LYSendMailFile(char *the_address,
		   char *the_filename,
		   char *the_subject GCC_UNUSED,
		   char *the_ccaddr GCC_UNUSED,
		   char *message)
{
    char *cmd = NULL;
    int code;

    if (!LYSystemMail())
	return 0;

#if USE_BLAT_MAILER
    if (mail_is_blat) {
	cmd = blat_cmd(the_filename,
		       the_address,
		       the_subject,
		       the_ccaddr,
		       personal_mail_address);
    } else
#endif
#ifdef __DJGPP__
    if (LYGetEnv("SHELL")) {
	extern char *shell;
	const char *c_option;
	const char *format = "%s %s %s -t %s -F %s";

	if (dj_is_bash) {
	    c_option = "-c";
	} else {
	    c_option = "/c";
	}
	HTAddParam(&cmd, format, 1, shell);
	HTAddParam(&cmd, format, 2, c_option);
	HTAddParam(&cmd, format, 3, system_mail);
	HTAddParam(&cmd, format, 4, the_address);
	HTAddParam(&cmd, format, 5, the_filename);
	HTEndParam(&cmd, format, 6);
    } else
#endif /* __DJGPP__ */
    {
	const char *format = "%s -t %s -F %s";

	HTAddParam(&cmd, format, 1, system_mail);
	HTAddParam(&cmd, format, 2, the_address);
	HTAddParam(&cmd, format, 3, the_filename);
	HTEndParam(&cmd, format, 4);
    }

    stop_curses();
    SetOutputMode(O_TEXT);
    printf("%s\n\n$ %s\n\n%s",
	   *message ? message : gettext("Sending"),
	   cmd, PLEASE_WAIT);
    code = LYSystem(cmd);
    LYSleepMsg();
    start_curses();
    SetOutputMode(O_BINARY);

    FREE(cmd);

    return code;
}
#endif /* CAN_PIPE_TO_FILE */
#endif /* USE_VMS_MAILER */

/*
 *  mailform() sends form content to the mailto address(es). - FM
 */
void mailform(const char *mailto_address,
	      const char *mailto_subject,
	      const char *mailto_content,
	      const char *mailto_type)
{
    FILE *fd;
    char *address = NULL;
    char *ccaddr = NULL;
    char *keywords = NULL;
    char *cp = NULL;
    char self[MAX_SUBJECT + 10];
    char subject[MAX_SUBJECT + 10];
    char *searchpart = NULL;
    char buf[512];
    int len, i;

#if USE_VMS_MAILER
    static char *cmd;
    char *command = NULL;
    BOOLEAN isPMDF = LYMailPMDF();
    char hdrfile[LY_MAXPATH];
#endif
#if !CAN_PIPE_TO_MAILER
    char my_tmpfile[LY_MAXPATH];
#endif

    CTRACE((tfp, "mailto_address: \"%s\"\n", NONNULL(mailto_address)));
    CTRACE((tfp, "mailto_subject: \"%s\"\n", NONNULL(mailto_subject)));
    CTRACE((tfp, "mailto_content: \"%s\"\n", NONNULL(mailto_content)));
    CTRACE((tfp, "mailto_type:    \"%s\"\n", NONNULL(mailto_type)));

    if (!LYSystemMail())
	return;

    if (!mailto_address || !mailto_content) {
	HTAlert(BAD_FORM_MAILTO);
	return;
    }
    subject[0] = '\0';
    self[0] = '\0';

    if ((cp = StrChr(mailto_address, '\n')) != NULL)
	*cp = '\0';
    StrAllocCopy(address, mailto_address);

    /*
     * Check for a ?searchpart.  - FM
     */
    if ((cp = StrChr(address, '?')) != NULL) {
	StrAllocCopy(searchpart, cp);
	*cp = '\0';
	cp = (searchpart + 1);
	if (*cp != '\0') {
	    /*
	     * Seek and handle a subject=foo.  - FM
	     */
	    extract_subject(subject, searchpart);

	    /*
	     * Seek and handle to=address(es) fields.  Appends to address.  -
	     * FM
	     */
	    extract_field(&address, searchpart, "to=");

	    /*
	     * Seek and handle cc=address(es) fields.  Excludes Bcc=address(es)
	     * as unsafe.  We may append our own cc (below) as a list for the
	     * actual mailing.  - FM
	     */
	    extract_field(&ccaddr, searchpart, "cc=");

	    /*
	     * Seek and handle keywords=term(s) fields.  - FM
	     */
	    extract_field(&keywords, searchpart, "keywords=");

	    if (keywords != NULL) {
		if (*keywords != '\0') {
		    SafeHTUnEscape(keywords);
		} else {
		    FREE(keywords);
		}
	    }

	    FREE(searchpart);
	}
    }

    if (convert_explorer(address)) {
	HTAlert(BAD_FORM_MAILTO);
	goto cleanup;
    }
    if (ccaddr != NULL) {
	if (convert_explorer(ccaddr)) {
	    FREE(ccaddr);
	}
    }

    /*
     * Unescape the address and ccaddr fields.  - FM
     */
    SafeHTUnEscape(address);
    if (ccaddr != NULL) {
	SafeHTUnEscape(ccaddr);
    }

    /*
     * Allow user to edit the default Subject - FM
     */
    if (subject[0] == '\0') {
	if (non_empty(mailto_subject)) {
	    LYStrNCpy(subject, mailto_subject, MAX_SUBJECT);
	} else {
	    sprintf(subject, "mailto:%.63s", address);
	}
    }
    _statusline(SUBJECT_PROMPT);
    if (LYGetStr(subject, FALSE, MAX_SUBJECT, NORECALL) < 0) {
	/*
	 * User cancelled via ^G. - FM
	 */
	HTInfoMsg(FORM_MAILTO_CANCELLED);
	goto cleanup;
    }

    /*
     * Allow user to specify a self copy via a CC:  entry, if permitted.  - FM
     */
    if (!LYNoCc) {
	sprintf(self, "%.*s", MAX_SUBJECT,
		isEmpty(personal_mail_address) ? "" : personal_mail_address);
	_statusline("Cc: ");
	if (LYGetStr(self, FALSE, MAX_SUBJECT, NORECALL) < 0) {
	    /*
	     * User cancelled via ^G. - FM
	     */
	    HTInfoMsg(FORM_MAILTO_CANCELLED);
	    goto cleanup;
	}
	remove_tildes(self);
	if (ccaddr == NULL) {
	    StrAllocCopy(ccaddr, self);
	} else {
	    StrAllocCat(ccaddr, ",");
	    StrAllocCat(ccaddr, self);
	}
    }
#if CAN_PIPE_TO_MAILER
    if ((fd = LYPipeToMailer()) == 0) {
	HTAlert(FORM_MAILTO_FAILED);
	goto cleanup;
    }

    if (non_empty(mailto_type)) {
	fprintf(fd, "Mime-Version: 1.0\n");
	fprintf(fd, "Content-Type: %s\n", mailto_type);
    }
    fprintf(fd, "To: %s\n", address);
    if (non_empty(personal_mail_address))
	fprintf(fd, "From: %s\n", personal_mail_address);
    if (non_empty(ccaddr))
	fprintf(fd, "Cc: %s\n", ccaddr);
    fprintf(fd, "Subject: %s\n\n", subject);
    if (non_empty(keywords))
	fprintf(fd, "Keywords: %s\n", keywords);
    _statusline(SENDING_FORM_CONTENT);
#else /* e.g., VMS, DOS */
    if ((fd = LYOpenTemp(my_tmpfile, ".txt", "w")) == NULL) {
	HTAlert(FORM_MAILTO_FAILED);
	goto cleanup;
    }
#if USE_VMS_MAILER
    if (isPMDF) {
	FILE *hfd;

	if ((hfd = LYOpenTemp(hdrfile, ".txt", "w")) == NULL) {
	    HTAlert(FORM_MAILTO_FAILED);
	    LYCloseTempFP(fd);
	    goto cleanup;
	}
	if (non_empty(mailto_type)) {
	    fprintf(hfd, "Mime-Version: 1.0\n");
	    fprintf(hfd, "Content-Type: %s\n", mailto_type);
	    if (non_empty(personal_mail_address))
		fprintf(hfd, "From: %s\n", personal_mail_address);
	}
	/*
	 * For PMDF, put any keywords and the subject in the header file and
	 * close it.  - FM
	 */
	if (non_empty(keywords)) {
	    fprintf(hfd, "Keywords: %s\n", keywords);
	}
	fprintf(hfd, "Subject: %s\n\n", subject);
	LYCloseTempFP(hfd);
    } else if (mailto_type &&
	       !strncasecomp(mailto_type, "multipart/form-data", 19)) {
	/*
	 * Ugh!  There's no good way to include headers while we're still using
	 * "generic" VMS MAIL, so we'll put this in the body of the message.  -
	 * FM
	 */
	fprintf(fd, "X-Content-Type: %s\n\n", mailto_type);
    }
#else /* !VMS (DOS) */
#if USE_BLAT_MAILER
    if (mail_is_blat) {
	if (strlen(subject) > MAX_SUBJECT)
	    subject[MAX_SUBJECT] = '\0';
    } else
#endif
    {
	if (non_empty(mailto_type)) {
	    fprintf(fd, "Mime-Version: 1.0\n");
	    fprintf(fd, "Content-Type: %s\n", mailto_type);
	}
	fprintf(fd, "To: %s\n", address);
	if (non_empty(personal_mail_address))
	    fprintf(fd, "From: %s\n", personal_mail_address);
	fprintf(fd, "Subject: %.70s\n\n", subject);
    }
#endif /* VMS */
#endif /* CAN_PIPE_TO_MAILER */

    /*
     * Break up the content into lines with a maximum length of 78.  If the
     * ENCTYPE was text/plain, we have physical newlines and should take them
     * into account.  Otherwise, the actual newline characters in the content
     * are hex escaped.  - FM
     */
    while ((cp = StrChr(mailto_content, '\n')) != NULL) {
	*cp = '\0';
	i = 0;
	len = (int) strlen(mailto_content);
	while (len > 78) {
	    LYStrNCpy(buf, &mailto_content[i], 78);
	    fprintf(fd, "%s\n", buf);
	    i += 78;
	    len = (int) strlen(&mailto_content[i]);
	}
	fprintf(fd, "%s\n", &mailto_content[i]);
	mailto_content = (cp + 1);
    }
    i = 0;
    len = (int) strlen(mailto_content);
    while (len > 78) {
	LYStrNCpy(buf, &mailto_content[i], 78);
	fprintf(fd, "%s\n", buf);
	i += 78;
	len = (int) strlen(&mailto_content[i]);
    }
    if (len)
	fprintf(fd, "%s\n", &mailto_content[i]);

#if CAN_PIPE_TO_MAILER
    pclose(fd);
    LYSleepMsg();
#else
    LYCloseTempFP(fd);
#if USE_VMS_MAILER
    /*
     * Set the mail command.  - FM
     */
    if (isPMDF) {
	/*
	 * Now set up the command.  - FM
	 */
	HTSprintf0(&cmd,
		   "%s %s %s,%s ",
		   system_mail,
		   system_mail_flags,
		   hdrfile,
		   my_tmpfile);
    } else {
	/*
	 * For "generic" VMS MAIL, include the subject in the command, and
	 * ignore any keywords to minimize risk of them making the line too
	 * long or having problem characters.  - FM
	 */
	HTSprintf0(&cmd,
		   "%s %s%s/subject=\"%s\" %s ",
		   system_mail,
		   system_mail_flags,
		   (strncasecomp(system_mail, "MAIL", 4) ? "" : "/noself"),
		   subject,
		   my_tmpfile);
    }
    StrAllocCopy(command, cmd);

    vms_append_addrs(&command, address, "");
    if (non_empty(ccaddr)) {
	vms_append_addrs(&command, ccaddr, "/CC");
    }

    stop_curses();
    printf("%s\n\n$ %s\n\n%s", SENDING_FORM_CONTENT, command, PLEASE_WAIT);
    LYSystem(command);		/* Mail (VMS) */
    FREE(command);
    LYSleepAlert();
    start_curses();
    (void) LYRemoveTemp(my_tmpfile);
    if (isPMDF)
	(void) LYRemoveTemp(hdrfile);
#else /* DOS */
    LYSendMailFile(address,
		   my_tmpfile,
		   subject,
		   ccaddr,
		   SENDING_FORM_CONTENT);
    (void) LYRemoveTemp(my_tmpfile);
#endif /* USE_VMS_MAILER */
#endif /* CAN_PIPE_TO_MAILER */

  cleanup:
    FREE(address);
    FREE(ccaddr);
    FREE(keywords);
    return;
}

/*
 *  mailmsg() sends a message to the owner of the file, if one is defined,
 *  telling of errors (i.e., link not available).
 */
void mailmsg(int cur,
	     char *owner_address,
	     char *filename,
	     char *linkname)
{
    FILE *fd, *fp;
    char *address = NULL;
    char *searchpart = NULL;
    char *cmd = NULL, *cp;

#ifdef ALERTMAIL
    BOOLEAN skip_parsing = FALSE;
#endif
#if !CAN_PIPE_TO_MAILER
    char *ccaddr;
    char subject[128];
    char my_tmpfile[LY_MAXPATH];
#endif
#if USE_VMS_MAILER
    BOOLEAN isPMDF = LYMailPMDF();
    char hdrfile[LY_MAXPATH];
    char *command = NULL;

    CTRACE((tfp, "mailmsg(%d, \"%s\", \"%s\", \"%s\")\n", cur,
	    NONNULL(owner_address),
	    NONNULL(filename),
	    NONNULL(linkname)));

#endif /* VMS */

    if (!LYSystemMail())
	return;

#ifdef ALERTMAIL
    if (owner_address == NULL) {
	owner_address = ALERTMAIL;
	skip_parsing = TRUE;
    }
#endif

    if (isEmpty(owner_address))
	return;
    if ((cp = StrChr(owner_address, '\n')) != NULL) {
#ifdef ALERTMAIL
	if (skip_parsing)
	    return;		/* invalidly defined - ignore - kw */
#else
	*cp = '\0';
#endif
    }
    if (!strncasecomp(owner_address, "lynx-dev@", 9)) {
	/*
	 * Silently refuse sending bad link messages to lynx-dev.
	 */
	return;
    }
    StrAllocCopy(address, owner_address);

#ifdef ALERTMAIL
    /*
     * If we are using a fixed address given by ALERTMAIL, it is supposed to
     * already be in usable form, without URL-isms like ?-searchpart and
     * URL-escaping.  So skip some code.  - kw
     */
    if (!skip_parsing)
#endif
    {
	/*
	 * Check for a ?searchpart.  - FM
	 */
	if ((cp = StrChr(address, '?')) != NULL) {
	    StrAllocCopy(searchpart, cp);
	    *cp = '\0';
	    cp = (searchpart + 1);
	    if (*cp != '\0') {
		/*
		 * Seek and handle to=address(es) fields.
		 * Appends to address.  We ignore any other
		 * headers in the ?searchpart.  - FM
		 */
		extract_field(&address, searchpart, "to=");
	    }
	}

	(void) convert_explorer(address);

	/*
	 * Unescape the address field.  - FM
	 */
	SafeHTUnEscape(address);
    }

    if (trim_comma(address)) {
	FREE(address);
	CTRACE((tfp, "mailmsg: No address in '%s'.\n", owner_address));
	return;
    }
#if CAN_PIPE_TO_MAILER
    if ((fd = LYPipeToMailer()) == 0) {
	FREE(address);
	CTRACE((tfp, "mailmsg: '%s' failed.\n", cmd));
	return;
    }

    fprintf(fd, "To: %s\n", address);
    fprintf(fd, "Subject: Lynx Error in %s\n", filename);
    if (non_empty(personal_mail_address)) {
	fprintf(fd, "Cc: %s\n", personal_mail_address);
    }
    fprintf(fd, "X-URL: %s\n", filename);
    fprintf(fd, "X-Mailer: %s, Version %s\n\n", LYNX_NAME, LYNX_VERSION);
#else
    if ((fd = LYOpenTemp(my_tmpfile, ".txt", "w")) == NULL) {
	CTRACE((tfp, "mailmsg: Could not fopen '%s'.\n", my_tmpfile));
	FREE(address);
	return;
    }
    sprintf(subject, "Lynx Error in %.56s", filename);
    ccaddr = personal_mail_address;
#if USE_VMS_MAILER
    if (isPMDF) {
	FILE *hfd;

	if ((hfd = LYOpenTemp(hdrfile, ".txt", "w")) == NULL) {
	    CTRACE((tfp, "mailmsg: Could not fopen '%s'.\n", hdrfile));
	    FREE(address);
	    return;
	}

	if (non_empty(personal_mail_address)) {
	    fprintf(fd, "Cc: %s\n", personal_mail_address);
	}
	fprintf(fd, "X-URL: %s\n", filename);
	fprintf(fd, "X-Mailer: %s, Version %s\n\n", LYNX_NAME, LYNX_VERSION);
	/*
	 * For PMDF, put the subject in the header file and close it.  - FM
	 */
	fprintf(hfd, "Subject: Lynx Error in %.56s\n\n", filename);
	LYCloseTempFP(hfd);
    }
#endif /* USE_VMS_MAILER */
#endif /* CAN_PIPE_TO_MAILER */

    fprintf(fd, gettext("The link   %s :?: %s \n"),
	    links[cur].lname, links[cur].target);
    fprintf(fd, gettext("called \"%s\"\n"), LYGetHiliteStr(cur, 0));
    fprintf(fd, gettext("in the file \"%s\" called \"%s\"\n"), filename, linkname);
    fprintf(fd, "%s\n\n", gettext("was requested but was not available."));
    fprintf(fd, "%s\n\n", gettext("Thought you might want to know."));

    fprintf(fd, "%s\n", gettext("This message was automatically generated by"));
    fprintf(fd, "%s %s", LYNX_NAME, LYNX_VERSION);
    if ((LynxSigFile != NULL) &&
	(fp = fopen(LynxSigFile, TXT_R)) != NULL) {
	fputs("-- \n", fd);
	while (LYSafeGets(&cmd, fp) != NULL)
	    fputs(cmd, fd);
	LYCloseInput(fp);
    }
#if CAN_PIPE_TO_MAILER
    pclose(fd);
#else
    LYCloseTempFP(fd);
#if USE_VMS_MAILER
    if (isPMDF) {
	/*
	 * Now set up the command.  - FM
	 */
	HTSprintf0(&command,
		   "%s %s %s,%s ",
		   system_mail,
		   system_mail_flags,
		   hdrfile,
		   my_tmpfile);
    } else {
	/*
	 * For "generic" VMS MAIL, include the subject in the command.  - FM
	 */
	HTSprintf0(&command,
		   "%s %s/self/subject=\"Lynx Error in %.56s\" %s ",
		   system_mail,
		   system_mail_flags,
		   filename,
		   my_tmpfile);
    }
    vms_append_addrs(&command, address, "");

    LYSystem(command);		/* VMS */
    FREE(command);
    FREE(cmd);
    (void) LYRemoveTemp(my_tmpfile);
    if (isPMDF) {
	(void) LYRemoveTemp(hdrfile);
    }
#else /* DOS */
    LYSendMailFile(address,
		   my_tmpfile,
		   subject,
		   ccaddr,
		   "");
    (void) LYRemoveTemp(my_tmpfile);
#endif /* USE_VMS_MAILER */
#endif /* CAN_PIPE_TO_MAILER */

    if (traversal) {
	FILE *ofp;

	if ((ofp = LYAppendToTxtFile(TRAVERSE_ERRORS)) == NULL) {
	    if ((ofp = LYNewTxtFile(TRAVERSE_ERRORS)) == NULL) {
		perror(NOOPEN_TRAV_ERR_FILE);
		exit_immediately(EXIT_FAILURE);
	    }
	}

	fprintf(ofp, "%s\t%s \tin %s\n",
		links[cur].lname, links[cur].target, filename);
	LYCloseOutput(ofp);
    }

    FREE(address);
    return;
}

/*
 *  reply_by_mail() invokes sendmail on Unix or mail on VMS to send
 *  a comment from the users to the owner
 */
void reply_by_mail(char *mail_address,
		   char *filename,
		   const char *title,
		   const char *refid)
{
    char user_input[LINESIZE];
    FILE *fd, *fp;
    const char *label = NULL;
    char *from_address = NULL;
    char *cc_address = NULL;
    char *to_address = NULL;
    char *the_subject = NULL;
    char *ccaddr = NULL;
    char *keywords = NULL;
    char *searchpart = NULL;
    char *body = NULL;
    char *cp = NULL, *cp1 = NULL;
    int i;
    int c = 0;			/* user input */
    char my_tmpfile[LY_MAXPATH];
    char default_subject[MAX_SUBJECT + 10];

#if USE_VMS_MAILER
    char *command = NULL;
    BOOLEAN isPMDF = LYMailPMDF();
    char hdrfile[LY_MAXPATH];
    FILE *hfd = 0;

#else
#if !CAN_PIPE_TO_MAILER
    char tmpfile2[LY_MAXPATH];
#endif
    char buf[4096];		/* 512 */
    char *header = NULL;
    size_t nbytes;
#endif /* USE_VMS_MAILER */

    CTRACE((tfp, "reply_by_mail(\"%s\", \"%s\", \"%s\", \"%s\")\n",
	    NONNULL(mail_address),
	    NONNULL(filename),
	    NONNULL(title),
	    NONNULL(refid)));

    term_letter = FALSE;

    if (!LYSystemMail())
	return;

    if (isEmpty(mail_address)) {
	HTAlert(NO_ADDRESS_IN_MAILTO_URL);
	return;
    }
    StrAllocCopy(to_address, mail_address);

    if ((fd = LYOpenTemp(my_tmpfile, ".txt", "w")) == NULL) {
	HTAlert(MAILTO_URL_TEMPOPEN_FAILED);
	return;
    }
#if USE_VMS_MAILER
    if (isPMDF) {
	if ((hfd = LYOpenTemp(hdrfile, ".txt", "w")) == NULL) {
	    HTAlert(MAILTO_URL_TEMPOPEN_FAILED);
	    return;
	}
    }
#endif /* VMS */
    default_subject[0] = '\0';

    /*
     * Check for a ?searchpart.  - FM
     */
    if ((cp = StrChr(to_address, '?')) != NULL) {
	StrAllocCopy(searchpart, cp);
	*cp = '\0';
	cp = (searchpart + 1);
	if (*cp != '\0') {
	    /*
	     * Seek and handle a subject=foo.  - FM
	     */
	    extract_subject(default_subject, searchpart);

	    /*
	     * Seek and handle to=address(es) fields.  Appends to address.  -
	     * FM
	     */
	    extract_field(&to_address, searchpart, "to=");

	    /*
	     * Seek and handle cc=address(es) fields.  Excludes Bcc=address(es)
	     * as unsafe.  We may append our own cc (below) as a list for the
	     * actual mailing.  - FM
	     */
	    extract_field(&ccaddr, searchpart, "cc=");

	    /*
	     * Seek and handle keywords=term(s) fields.  - FM
	     */
	    extract_field(&keywords, searchpart, "keywords=");

	    if (keywords != NULL) {
		if (*keywords != '\0') {
		    SafeHTUnEscape(keywords);
		} else {
		    FREE(keywords);
		}
	    }

	    /*
	     * Seek and handle body=foo fields.  - FM
	     */
	    extract_body(&body, searchpart);

	    FREE(searchpart);
	}
    }

    if (convert_explorer(to_address)) {
	HTAlert(NO_ADDRESS_IN_MAILTO_URL);
	goto cancelled;
    }
    if (ccaddr != NULL) {
	if (convert_explorer(ccaddr)) {
	    FREE(ccaddr);
	}
    }

    /*
     * Unescape the address and ccaddr fields.  - FM
     */
    SafeHTUnEscape(to_address);
    if (ccaddr != NULL) {
	SafeHTUnEscape(ccaddr);
    }

    /*
     * Set the default subject.  - FM
     */
    if ((default_subject[0] == '\0') && non_empty(title)) {
	LYStrNCpy(default_subject, title, MAX_SUBJECT);
    }

    /*
     * Use ^G to cancel mailing of comment and don't let SIGINTs exit lynx.
     */
    signal(SIGINT, terminate_letter);

#if USE_VMS_MAILER
    if (isPMDF || !body) {
	/*
	 * Put the X-URL and X-Mailer lines in the hdrfile for PMDF or
	 * my_tmpfile for VMS MAIL.  - FM
	 */
	fprintf((isPMDF ? hfd : fd),
		"X-URL: %s%s\n",
		isEmpty(filename) ? STR_MAILTO_URL : filename,
		isEmpty(filename) ? to_address : "");
	fprintf((isPMDF ? hfd : fd),
		"X-Mailer: %s, Version %s\n", LYNX_NAME, LYNX_VERSION);
#ifdef NO_ANONYMOUS_EMAIL
	if (!isPMDF) {
	    fprintf(fd, "\n");
	}
#endif /* NO_ANONYMOUS_EMAIL */
    }
#else /* Unix/DOS/Windows */
    /*
     * Put the To:  line in the header.
     */
#ifndef DOSPATH
    HTSprintf(&header, "To: %s\n", to_address);
#endif

    /*
     * Put the Mime-Version, Content-Type and Content-Transfer-Encoding in the
     * header.  This assumes that the same character set is used for composing
     * the mail which is currently selected as display character set...  Don't
     * send a charset if we have a CJK character set selected, since it may not
     * be appropriate for mail...  Also don't use an unofficial "x-" charset. 
     * Also if the charset would be "us-ascii" (7-bit replacements selected,
     * don't send any MIME headers.  - kw
     */
    if (strncasecomp(LYCharSet_UC[current_char_set].MIMEname,
		     "us-ascii", 8) != 0) {
	StrAllocCat(header, "Mime-Version: 1.0\n");
	if (!LYHaveCJKCharacterSet &&
	    strncasecomp(LYCharSet_UC[current_char_set].MIMEname, "x-", 2)
	    != 0) {
	    HTSprintf(&header, "Content-Type: " STR_PLAINTEXT "; charset=%s\n",
		      LYCharSet_UC[current_char_set].MIMEname);
	}
	StrAllocCat(header, "Content-Transfer-Encoding: 8bit\n");
    }
    /*
     * Put the X-URL and X-Mailer lines in the header.
     */
    if (non_empty(filename)) {
	HTSprintf(&header, "X-URL: %s\n", filename);
    } else {
	HTSprintf(&header, "X-URL: mailto:%s\n", to_address);
    }
    HTSprintf(&header, "X-Mailer: %s, Version %s\n", LYNX_NAME, LYNX_VERSION);

    if (non_empty(refid)) {
	HTSprintf(&header, "In-Reply-To: <%s>\n", refid);
    }
#endif /* VMS */

    /*
     * Clear the screen and inform the user.
     */
    LYclear();
    LYmove(2, 0);
    scrollok(LYwin, TRUE);	/* Enable scrolling. */
    if (body)
	LYaddstr(SENDING_MESSAGE_WITH_BODY_TO);
    else
	LYaddstr(SENDING_COMMENT_TO);
    show_addresses(to_address);
    if (
#if USE_VMS_MAILER
	   (isPMDF == TRUE) &&
#endif /* VMS */
	   (cp = ccaddr) != NULL) {
	if (StrChr(cp, ',') != NULL) {
	    LYaddstr(WITH_COPIES_TO);
	} else {
	    LYaddstr(WITH_COPY_TO);
	}
	show_addresses(ccaddr);
    }
    LYaddstr(CTRL_G_TO_CANCEL_SEND);

#if USE_VMS_MAILER
    if (isPMDF || !body) {
#endif /* USE_VMS_MAILER */
#ifndef NO_ANONYMOUS_EMAIL
	/*
	 * Get the user's personal name.
	 */
	LYaddstr(ENTER_NAME_OR_BLANK);
#if USE_VMS_MAILER
	if (isPMDF) {
	    label = "Personal_name";
	} else {
	    label = "X-Personal_name";
	}
#else
	label = "X-Personal_Name";
#endif /* USE_VMS_MAILER */
	if (!header_prompt(label, &personal_mail_name, LINESIZE)) {
	    goto cancelled;
	}
	if (*personal_mail_name) {
#if USE_VMS_MAILER
	    fprintf((isPMDF ? hfd : fd), "%s: %s\n", label, personal_mail_name);
#else
	    HTSprintf(&header, "%s: %s\n", label, personal_mail_name);
#endif /* VMS */
	}

	/*
	 * Get the user's return address.
	 */
	LYaddstr(ENTER_MAIL_ADDRESS_OR_OTHER);
	LYaddstr(MEANS_TO_CONTACT_FOR_RESPONSE);
#if USE_VMS_MAILER
	if (isPMDF) {
	    label = "From";
	} else {
	    label = "X-From";
	}
#else
	label = "From";
#endif /* VMS */
	/* Add the personal mail address if there is one. */
	if (non_empty(personal_mail_address))
	    StrAllocCopy(from_address, personal_mail_address);
	if (!header_prompt(label, &from_address, LINESIZE)) {
	    goto cancelled;
	}
#if USE_VMS_MAILER
	if (*from_address) {
	    fprintf(isPMDF ? hfd : fd, "%s: %s\n", label, from_address);
	}
	if (!isPMDF) {
	    fprintf(fd, "\n");
	}
#else
	HTSprintf(&header, "%s: %s\n", label, from_address);
#endif /* USE_VMS_MAILER */
#endif /* !NO_ANONYMOUS_EMAIL */
#if USE_VMS_MAILER
    }
#endif /* USE_VMS_MAILER */

    /*
     * Get the subject line.
     */
    LYaddstr(ENTER_SUBJECT_LINE);
    label = "Subject";
    if (*default_subject) {
	StrAllocCopy(the_subject, default_subject);
    } else if (non_empty(filename)) {
	HTSprintf(&the_subject, "%s", filename);
    } else {
	HTSprintf(&the_subject, "mailto:%s", to_address);
    }
    if (!header_prompt(label, &the_subject, MAX_SUBJECT)) {
	goto cancelled;
    }

    /*
     * Offer a CC line, if permitted.  - FM
     */
    if (!LYNoCc) {
	LYaddstr(ENTER_ADDRESS_FOR_CC);
	LYaddstr(BLANK_FOR_NO_COPY);
	if (non_empty(personal_mail_address))
	    StrAllocCopy(cc_address, personal_mail_address);
	if (!header_prompt("Cc", &cc_address, LINESIZE)) {
	    goto cancelled;
	}
	comma_append(&ccaddr, cc_address);
    }
#if !USE_VMS_MAILER
    HTSprintf(&header, "%s: %s\n", label, the_subject);
#if !CAN_PIPE_TO_MAILER
    if (*to_address) {
	HTSprintf(&header, "To: %s\n", to_address);
    }
#endif

    /*
     * Add the Cc:  header.  - FM
     */
    if (non_empty(ccaddr)) {
	HTSprintf(&header, "Cc: %s\n", ccaddr);
    }

    /*
     * Add the Keywords:  header.  - FM
     */
    if (non_empty(keywords)) {
	HTSprintf(&header, "Keywords: %s\n", keywords);
    }

    /*
     * Terminate the header.
     */
    StrAllocCat(header, "\n");
    CTRACE((tfp, "**header==\n%s", header));
#endif /* !VMS */

    if (!no_editor && non_empty(editor)) {

	if (body) {
	    cp1 = body;
	    while ((cp = StrChr(cp1, '\n')) != NULL) {
		*cp++ = '\0';
		fprintf(fd, "%s\n", cp1);
		cp1 = cp;
	    }
	} else if (strcmp(HTLoadedDocumentURL(), "")) {
	    /*
	     * Ask if the user wants to include the original message.
	     */
	    BOOLEAN is_preparsed = (BOOL) (LYPreparsedSource &&
					   HTisDocumentSource());

	    if (HTConfirm(is_preparsed
			  ? INC_PREPARSED_MSG_PROMPT
			  : INC_ORIG_MSG_PROMPT) == YES) {
		print_wwwfile_to_fd(fd, TRUE, (BOOL) !is_preparsed);
	    }
	}
	LYCloseTempFP(fd);	/* Close the tmpfile. */
	scrollok(LYwin, FALSE);	/* Stop scrolling.    */

	if (term_letter || LYCharIsINTERRUPT(c))
	    goto cleanup;

	/*
	 * Spawn the users editor on the mail file
	 */
	edit_temporary_file(my_tmpfile, "", SPAWNING_EDITOR_FOR_MAIL);

    } else if (body) {
	/*
	 * Let user review the body.  - FM
	 */
	LYclear();
	LYmove(0, 0);
	LYaddstr(REVIEW_MESSAGE_BODY);
	LYrefresh();
	cp1 = body;
	i = (LYlines - 5);
	while ((cp = StrChr(cp1, '\n')) != NULL) {
	    if (i <= 0) {
		LYaddstr(RETURN_TO_CONTINUE);
		LYrefresh();
		c = LYgetch();
		LYaddstr("\n");
		if (term_letter || LYCharIsINTERRUPT(c)) {
		    goto cancelled;
		}
		i = (LYlines - 2);
	    }
	    *cp++ = '\0';
	    fprintf(fd, "%s\n", cp1);
	    LYaddstr(cp1);
	    LYaddstr("\n");
	    cp1 = cp;
	    i--;
	}
	while (i >= 0) {
	    LYaddstr("\n");
	    i--;
	}
	LYrefresh();
	LYCloseTempFP(fd);	/* Close the tmpfile.     */
	scrollok(LYwin, FALSE);	/* Stop scrolling.        */

    } else {
	/*
	 * Use the internal line editor for the message.
	 */
	LYaddstr(ENTER_MESSAGE_BELOW);
	LYaddstr(ENTER_PERIOD_WHEN_DONE_A);
	LYaddstr(ENTER_PERIOD_WHEN_DONE_B);
	LYaddstr(CTRL_G_TO_CANCEL_SEND);
	LYaddstr("\n\n");
	LYrefresh();
	*user_input = '\0';
	if (LYGetStr(user_input, FALSE, sizeof(user_input), NORECALL) < 0 ||
	    term_letter || STREQ(user_input, ".")) {
	    goto cancelled;
	}

	while (!STREQ(user_input, ".") && !term_letter) {
	    LYaddstr("\n");
	    remove_tildes(user_input);
	    fprintf(fd, "%s\n", user_input);
	    *user_input = '\0';
	    if (LYGetStr(user_input, FALSE,
			 sizeof(user_input), NORECALL) < 0) {
		goto cancelled;
	    }
	}

	fprintf(fd, "\n");	/* Terminate the message. */
	LYCloseTempFP(fd);	/* Close the tmpfile.     */
	scrollok(LYwin, FALSE);	/* Stop scrolling.        */
    }

#if !USE_VMS_MAILER
    /*
     * Ignore CTRL-C on this last question.
     */
    signal(SIGINT, SIG_IGN);
#endif /* !VMS */
    LYStatusLine = (LYlines - 1);
    c = HTConfirm(body ? SEND_MESSAGE_PROMPT : SEND_COMMENT_PROMPT);
    LYStatusLine = -1;
    if (c != YES) {
	LYclear();		/* clear the screen */
	goto cleanup;
    }
    if ((body == NULL && non_empty(LynxSigFile)) &&
	(fp = fopen(LynxSigFile, TXT_R)) != NULL) {
	LYStatusLine = (LYlines - 1);
	if (term_letter) {
	    _user_message(APPEND_SIG_FILE, LynxSigFile);
	    c = 0;
	} else {
	    char *msg = NULL;

	    HTSprintf0(&msg, APPEND_SIG_FILE, LynxSigFile);
	    c = HTConfirm(msg);
	    FREE(msg);
	}
	LYStatusLine = -1;
	if (c == YES) {
	    if ((fd = fopen(my_tmpfile, TXT_A)) != NULL) {
		char *buffer = NULL;

		fputs("-- \n", fd);
		while (LYSafeGets(&buffer, fp) != NULL) {
		    fputs(buffer, fd);
		}
		LYCloseOutput(fd);
		FREE(buffer);
	    }
	}
	LYCloseInput(fp);
    }
    LYclear();			/* Clear the screen. */

    /*
     * Send the message.
     */
#if USE_VMS_MAILER
    /*
     * Set the mail command.  - FM
     */
    if (isPMDF) {
	/*
	 * For PMDF, put any keywords and the subject in the header file and
	 * close it.  - FM
	 */
	if (non_empty(keywords)) {
	    fprintf(hfd, "Keywords: %s\n", keywords);
	}
	fprintf(hfd, "Subject: %s\n\n", the_subject);
	LYCloseTempFP(hfd);
	/*
	 * Now set up the command.  - FM
	 */
	HTSprintf0(&command, "%s %s %s,%s ",
		   system_mail,
		   system_mail_flags,
		   hdrfile,
		   my_tmpfile);
    } else {
	/*
	 * For "generic" VMS MAIL, include the subject in the command, and
	 * ignore any keywords to minimize risk of them making the line too
	 * long or having problem characters.  - FM
	 */
	HTSprintf0(&command, "%s %s%s/subject=\"%s\" %s ",
		   system_mail,
		   system_mail_flags,
		   (strncasecomp(system_mail, "MAIL", 4) ? "" : "/noself"),
		   the_subject,
		   my_tmpfile);
    }

    vms_append_addrs(&command, to_address, "");
    if (non_empty(ccaddr)) {
	vms_append_addrs(&command, ccaddr, "/CC");
    }

    stop_curses();
    printf("%s\n\n$ %s\n\n%s", SENDING_COMMENT, command, PLEASE_WAIT);
    LYSystem(command);		/* SENDING COMMENT (VMS) */
    FREE(command);
    LYSleepAlert();
    start_curses();
#else /* Unix/DOS/Windows */
    /*
     * Send the tmpfile into sendmail.
     */
    _statusline(SENDING_YOUR_MSG);
#if CAN_PIPE_TO_MAILER
    signal(SIGINT, SIG_IGN);
    if ((fp = LYPipeToMailer()) == 0) {
	HTInfoMsg(CANCELLED);
    }
#else
    if ((fp = LYOpenTemp(tmpfile2, ".txt", "w")) == NULL) {
	HTAlert(MAILTO_URL_TEMPOPEN_FAILED);
    }
#endif /* CAN_PIPE_TO_MAILER */
    if (fp != 0) {
	fd = fopen(my_tmpfile, TXT_R);
	if (fd == NULL) {
	    HTInfoMsg(CANCELLED);
#if CAN_PIPE_TO_MAILER
	    pclose(fp);
#else
	    LYCloseTempFP(fp);
#endif /* CAN_PIPE_TO_MAILER */
	} else {
#if USE_BLAT_MAILER
	    if (!mail_is_blat)
		fputs(header, fp);
#else
	    fputs(header, fp);
#endif
	    while ((nbytes = fread(buf, (size_t) 1, sizeof(buf), fd)) != 0) {
		if (fwrite(buf, (size_t) 1, (size_t) nbytes, fp) < nbytes)
		    break;
	    }
#if CAN_PIPE_TO_MAILER
	    pclose(fp);
#else
	    LYCloseTempFP(fp);	/* Close the tmpfile. */
	    LYSendMailFile(to_address,
			   tmpfile2,
			   the_subject,
			   ccaddr,
			   SENDING_COMMENT);
	    (void) LYRemoveTemp(tmpfile2);	/* Delete the tmpfile. */
#endif /* CAN_PIPE_TO_MAILER */
	    LYCloseInput(fd);	/* Close the tmpfile. */
	}
    }
#endif /* USE_VMS_MAILER */
    goto cleanup;

    /*
     * Come here to cleanup and exit.
     */
  cancelled:
    HTInfoMsg(CANCELLED);
    LYCloseTempFP(fd);		/* Close the tmpfile.   */
    scrollok(LYwin, FALSE);	/* Stop scrolling.      */
  cleanup:
    signal(SIGINT, cleanup_sig);
    term_letter = FALSE;

#if USE_VMS_MAILER
    while (LYRemoveTemp(my_tmpfile) == 0) ;	/* Delete the tmpfile(s). */
    if (isPMDF) {
	(void) LYRemoveTemp(hdrfile);	/* Delete the hdrfile. */
    }
#else
    FREE(header);
    (void) LYRemoveTemp(my_tmpfile);	/* Delete the tmpfile. */
#endif /* VMS */

    FREE(from_address);
    FREE(the_subject);
    FREE(cc_address);
    FREE(to_address);
    FREE(ccaddr);
    FREE(keywords);
    FREE(body);
    return;
}

/*
 * Check that we have configured values for system mailer.
 */
BOOLEAN LYSystemMail(void)
{
    if (isEmpty(system_mail) || !strcmp(system_mail, "unknown")) {
	HTAlert(gettext("No system mailer configured"));
	return FALSE;
    }
    return TRUE;
}
