V10/lbin/mailx/collect.c
#ident "@(#)collect.c 1.7 'attmail mail(1) command'"
#ident "@(#)mailx:collect.c 1.18.1.1"
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)mailx:collect.c 1.16.1.1"
/*
* mailx -- a modified version of a University of California at Berkeley
* mail program
*
* Collect input from standard input, handling
* ~ escapes.
*/
#include "rcv.h"
#ifdef SIGCONT
static void collcont();
#endif
static void collrub();
static void cpout();
static int exwrite();
static int forward();
static void intack();
static FILE *mesedit();
static FILE *mespipe();
static void resetsigs();
static int stripnulls();
static long transmit();
static void xhalt();
static char **Xaddone();
/*
* Read a message from standard output and return a read file to it
* or NULL on error.
*/
/*
* The following hokiness with global variables is so that on
* receipt of an interrupt signal, the partial message can be salted
* away on dead.letter. The output file must be available to flush,
* and the input to read. Several open files could be saved all through
* mailx if stdio allowed simultaneous read/write access.
*/
static void (*savesig)(); /* Previous SIGINT value */
static void (*savehup)(); /* Previous SIGHUP value */
#ifdef SIGCONT
static void (*savecont)(); /* Previous SIGCONT value */
#endif
static FILE *newi; /* File for saving away */
static FILE *newo; /* Output side of same */
static int hf; /* Ignore interrups */
static int hadintr; /* Have seen one SIGINT so far */
static struct header *savehp;
static jmp_buf coljmp; /* To get back to work */
FILE *
collect(hp)
struct header *hp;
{
FILE *ibuf, *fbuf, *obuf;
int escape, eof;
long lc, cc;
register int c, t;
char linebuf[LINESIZE+1], *cp;
char *iprompt;
void (*sigpipe)(), (*sigint)();
noreset++;
ibuf = obuf = NULL;
newi = newo = NULL;
if ((obuf = fopen(tempMail, "w")) == NULL) {
perror(tempMail);
goto err;
}
newo = obuf;
if ((ibuf = fopen(tempMail, "r")) == NULL) {
perror(tempMail);
newo = NULL;
fclose(obuf);
goto err;
}
newi = ibuf;
removefile(tempMail);
hf = !!value("ignore");
hadintr = 1;
savehp = hp;
if ((savesig = sigset(SIGINT, SIG_IGN)) != (void (*)())SIG_IGN)
sigset(SIGINT, hf ? (void (*)())intack : (void (*)())collrub);
if ((savehup = sigset(SIGHUP, SIG_IGN)) != (void (*)())SIG_IGN)
sigset(SIGHUP, collrub);
#ifdef SIGCONT
# ifdef preSVr4
savecont = sigset(SIGCONT, collcont);
# else
{
struct sigaction nsig, osig;
nsig.sa_handler = collcont;
sigemptyset(&nsig.sa_mask);
nsig.sa_flags = SA_RESTART;
(void) sigaction(SIGCONT, &nsig, &osig);
savecont = osig.sa_handler;
}
# endif
#endif
/*
* If we are going to prompt for subject/cc/bcc,
* refrain from printing a newline after
* the headers (since some people mind).
*/
if (hp->h_subject == NOSTR) {
hp->h_subject = sflag;
sflag = NOSTR;
}
t = GMASK;
c = 0;
if (intty) {
if (hp->h_subject == NOSTR && value("asksub"))
c |= GSUBJECT;
/* adb: due to popular demand, these were moved to the end of the letter
* adb: if (hp->h_cc == NOSTR && value("askcc"))
* adb: c |= GCC;
* adb: if (hp->h_bcc == NOSTR && value("askbcc"))
* adb: c |= GBCC;
* adb */
if (c)
t &= ~GNL;
}
if (hp->h_seq != 0) {
puthead(hp, stdout, t);
fflush(stdout);
}
if (setjmp(coljmp))
goto err;
if (c)
grabh(hp, c, 1);
escape = SENDESC;
if ((cp = value("escape")) != NOSTR)
escape = *cp;
eof = 0;
if ((cp = value("MAILX_HEAD")) != NOSTR) {
cpout( cp, obuf);
if (isatty(fileno(stdin)))
cpout( cp, stdout);
}
iprompt = value("iprompt");
fflush(obuf);
hadintr = 0;
for (;;) {
int nread, hasnulls;
setjmp(coljmp);
sigrelse(SIGINT);
sigrelse(SIGHUP);
if (intty && outtty && iprompt)
fputs(iprompt, stdout);
flush();
if ((nread = getline(linebuf,LINESIZE,stdin,&hasnulls)) == NULL) {
if (intty && value("ignoreeof") != NOSTR) {
if (++eof > 35)
break;
printf("Use \".\" to terminate letter\n");
continue;
}
break;
}
eof = 0;
hadintr = 0;
if (intty && equal(".\n", linebuf) &&
(value("dot") != NOSTR || value("ignoreeof") != NOSTR))
break;
if ((linebuf[0] != escape) || (rflag != NOSTR) || !intty) {
if (write(fileno(obuf),linebuf,nread) != nread)
goto err;
continue;
}
/*
* On double escape, just send the single one.
*/
if ((nread > 1) && (linebuf[1] == escape)) {
if (write(fileno(obuf),linebuf+1,nread-1) != (nread-1))
goto err;
continue;
}
if (hasnulls)
nread = stripnulls(linebuf, nread);
c = linebuf[1];
linebuf[nread - 1] = '\0';
switch (c) {
default:
/*
* Otherwise, it's an error.
*/
printf("Unknown tilde escape.\n");
break;
case 'a':
case 'A':
/*
* autograph; sign the letter.
*/
if (cp = value(c=='a' ? "sign":"Sign")) {
cpout( cp, obuf);
if (isatty(fileno(stdin)))
cpout( cp, stdout);
}
break;
case 'i':
/*
* insert string
*/
for (cp = &linebuf[2]; any(*cp, " \t"); cp++)
;
if (*cp)
cp = value(cp);
if (cp != NOSTR) {
cpout(cp, obuf);
if (isatty(fileno(stdout)))
cpout(cp, stdout);
}
break;
case '!':
/*
* Shell escape, send the balance of the
* line to sh -c.
*/
shell(&linebuf[2]);
break;
case ':':
case '_':
/*
* Escape to command mode, but be nice!
*/
execute(&linebuf[2], 1);
iprompt = value("iprompt");
if (cp = value("escape"))
escape = *cp;
printf("(continue)\n");
break;
case '.':
/*
* Simulate end of file on input.
*/
goto eofl;
case 'q':
case 'Q':
/*
* Force a quit of sending mail.
* Act like an interrupt happened.
*/
hadintr++;
collrub(SIGINT);
exit(1);
/* NOTREACHED */
case 'x':
xhalt();
break; /* not reached */
case 'h':
/*
* Grab a bunch of headers.
*/
if (!intty || !outtty) {
printf("~h: no can do!?\n");
break;
}
grabh(hp, GMASK, 0);
printf("(continue)\n");
break;
case 't':
/*
* Add to the To list.
*/
hp->h_to = addto(hp->h_to, &linebuf[2]);
hp->h_seq++;
break;
case 's':
/*
* Set the Subject list.
*/
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
hp->h_subject = savestr(cp);
hp->h_seq++;
break;
case 'c':
/*
* Add to the CC list.
*/
hp->h_cc = addto(hp->h_cc, &linebuf[2]);
hp->h_seq++;
break;
case 'b':
/*
* Add stuff to blind carbon copies list.
*/
hp->h_bcc = addto(hp->h_bcc, &linebuf[2]);
hp->h_seq++;
break;
case 'R':
hp->h_defopt = addone(hp->h_defopt, "/receipt");
hp->h_seq++;
fprintf(stderr, "Return receipt marked.\n");
break;
case 'd':
copy(Getf("DEAD"), &linebuf[2]);
/* FALLTHROUGH */
case '<':
case 'r': {
int ispip;
/*
* Invoke a file:
* Search for the file name,
* then open it and copy the contents to obuf.
*
* if name begins with '!', read from a command
*/
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
if (*cp == '\0') {
printf("Interpolate what file?\n");
break;
}
if (*cp=='!') {
/* take input from a command */
ispip = 1;
if ((fbuf = npopen(++cp, "r"))==NULL) {
perror("");
break;
}
sigint = sigset(SIGINT, SIG_IGN);
} else {
ispip = 0;
cp = expand(cp);
if (cp == NOSTR)
break;
if (isdir(cp)) {
printf("%s: directory\n",cp);
break;
}
if ((fbuf = fopen(cp, "r")) == NULL) {
perror(cp);
break;
}
}
printf("\"%s\" ", cp);
flush();
lc = cc = 0;
while ((t = getc(fbuf)) != EOF) {
if (t == '\n')
lc++;
if (putc(t, obuf) == EOF) {
if (ispip) {
npclose(fbuf);
sigset(SIGINT, sigint);
} else
fclose(fbuf);
goto err;
}
cc++;
}
if (ispip) {
npclose(fbuf);
sigset(SIGINT, sigint);
} else
fclose(fbuf);
printf("%ld/%ld\n", lc, cc);
fflush(obuf);
break;
}
case 'w':
/*
* Write the message on a file.
*/
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
if (*cp == '\0') {
fprintf(stderr, "Write what file!?\n");
break;
}
if ((cp = expand(cp)) == NOSTR)
break;
fflush(obuf);
rewind(ibuf);
exwrite(cp, ibuf);
break;
case 'm':
case 'f':
/*
* Interpolate the named messages, if we
* are in receiving mail mode. Does the
* standard list processing garbage.
* If ~f is given, we don't shift over.
*/
if (!rcvmode) {
printf("No messages to send from!?!\n");
break;
}
cp = &linebuf[2];
while (any(*cp, " \t"))
cp++;
if (forward(cp, obuf, c) < 0)
goto err;
fflush(obuf);
printf("(continue)\n");
break;
case '?':
if ((fbuf = fopen(THELPFILE, "r")) == NULL) {
printf("No help just now.\n");
break;
}
t = getc(fbuf);
while (t != -1) {
putchar(t);
t = getc(fbuf);
}
fclose(fbuf);
break;
case 'p':
/*
* Print out the current state of the
* message without altering anything.
*/
fflush(obuf);
rewind(ibuf);
if (value("crt")) {
char *pg = PG;
if (!*pg)
pg = "cat";
if (fbuf = npopen(pg, "w")) { /* adb */
sigint = sigset(SIGINT, SIG_IGN);
sigpipe = sigset(SIGPIPE, SIG_IGN);
} else
fbuf = stdout;
} else
fbuf = stdout;
fprintf(fbuf, "-------\nMessage contains:\n");
puthead(hp, fbuf, GMASK);
while ((t = getc(ibuf))!=EOF)
putc(t, fbuf);
if (fbuf != stdout) {
npclose(fbuf);
sigset(SIGPIPE, sigpipe);
sigset(SIGINT, sigint);
}
printf("(continue)\n");
break;
case '^':
case '|':
/*
* Pipe message through command.
* Collect output as new message.
*/
obuf = mespipe(ibuf, obuf, &linebuf[2]);
newo = obuf;
ibuf = newi;
newi = ibuf;
printf("(continue)\n");
break;
case 'v':
case 'e':
/*
* Edit the current message.
* 'e' means to use EDITOR
* 'v' means to use VISUAL
*/
if ((obuf = mesedit(ibuf, obuf, c, hp)) == NULL)
goto err;
newo = obuf;
ibuf = newi;
printf("(continue)\n");
break;
}
fflush(obuf);
}
eofl:
c = 0; /* adb */
if (intty) { /* adb */
if (hp->h_cc == NOSTR && value("askcc")) /* adb */
c |= GCC; /* adb */
if (hp->h_bcc == NOSTR && value("askbcc")) /* adb */
c |= GBCC; /* adb */
} /* adb */
if (c) /* adb */
grabh(hp, c, 1); /* adb */
fflush(obuf);
if ((cp = value("MAILX_TAIL")) != NOSTR) {
cpout( cp, obuf);
if (isatty(fileno(stdin)))
cpout( cp, stdout);
}
fclose(obuf);
rewind(ibuf);
resetsigs(0);
noreset = 0;
return(ibuf);
err:
if (ibuf != NULL)
fclose(ibuf);
if (obuf != NULL)
fclose(obuf);
resetsigs(0);
noreset = 0;
return(NULL);
}
static void resetsigs(resethup)
int resethup;
{
(void) sigset(SIGINT, savesig);
if (resethup)
(void) sigset(SIGHUP, savehup);
#ifdef SIGCONT
# ifdef preSVr4
(void) sigset(SIGCONT, savecont);
# else
{
struct sigaction nsig;
nsig.sa_handler = savecont;
sigemptyset(&nsig.sa_mask);
nsig.sa_flags = SA_RESTART;
(void) sigaction(SIGCONT, &nsig, (struct sigaction*)0);
}
# endif
#endif
}
/*
* Write a file ex-like.
*/
static int
exwrite(name, ibuf)
char name[];
FILE *ibuf;
{
register FILE *of;
struct stat junk;
void (*sigint)(), (*sigpipe)();
int pi = (*name == '!');
if (!pi && stat(name, &junk) >= 0
&& (junk.st_mode & S_IFMT) == S_IFREG) {
fprintf(stderr, "%s: File exists\n", name);
return(-1);
}
if ((of = pi ? npopen(++name, "w") : fopen(name, "w")) == NULL) {
perror(name);
return(-1);
}
if (pi) {
sigint = sigset(SIGINT, SIG_IGN);
sigpipe = sigset(SIGPIPE, SIG_IGN);
}
lcwrite(name, ibuf, of);
pi ? npclose(of) : fclose(of);
if (pi) {
sigset(SIGPIPE, sigpipe);
sigset(SIGINT, sigint);
}
return(0);
}
void
lcwrite(fn, fi, fo)
char *fn;
FILE *fi, *fo;
{
register int c;
long lc, cc;
printf("\"%s\" ", fn);
fflush(stdout);
lc = cc = 0;
while ((c = getc(fi)) != EOF) {
cc++;
if (putc(c, fo) == '\n')
lc++;
if (ferror(fo)) {
perror("");
return;
}
}
printf("%ld/%ld\n", lc, cc);
fflush(stdout);
}
/*
* Edit the message being collected on ibuf and obuf.
* Write the message out onto some poorly-named temp file
* and point an editor at it.
*
* On return, make the edit file the new temp file.
*/
static FILE *
mesedit(ibuf, obuf, c, hp)
FILE *ibuf, *obuf;
struct header *hp;
{
pid_t pid;
FILE *fbuf;
register int t;
void (*sigint)();
struct stat sbuf;
register char *edit;
char hdr[LINESIZE];
if (stat(tempEdit, &sbuf) >= 0) {
printf("%s: file exists\n", tempEdit);
goto out;
}
close(creat(tempEdit, TEMPPERM));
if ((fbuf = fopen(tempEdit, "w")) == NULL) {
perror(tempEdit);
goto out;
}
fflush(obuf);
rewind(ibuf);
puthead(hp, fbuf, GMASK);
while ((t = getc(ibuf)) != EOF)
putc(t, fbuf);
fflush(fbuf);
if (ferror(fbuf)) {
perror(tempEdit);
removefile(tempEdit);
goto out;
}
fclose(fbuf);
if ((edit = value(c == 'e' ? "EDITOR" : "VISUAL")) == NOSTR)
edit = c == 'e' ? EDITOR : VISUAL;
edit = expand(edit);
/*
* Fork/execlp the editor on the edit file
*/
pid = fork();
if ( pid == (pid_t)-1 ) {
perror("fork");
removefile(tempEdit);
goto out;
}
if ( pid == 0 ) {
sigchild();
execlp(edit, edit, tempEdit, (char *)0);
perror(edit);
_exit(1);
}
sigint = sigset(SIGINT, SIG_IGN);
while (wait((int *)0) != pid)
;
sigset(SIGINT, sigint);
/*
* Now switch to new file.
*/
if ((fbuf = fopen(tempEdit, "r")) == NULL) {
perror(tempEdit);
removefile(tempEdit);
goto out;
}
removefile(tempEdit);
hp->h_to = hp->h_subject = hp->h_cc = hp->h_bcc = hp->h_defopt = NOSTR;
hp->h_others = NOSTRPTR;
hp->h_seq = 0;
while (gethfield(fbuf, hdr, 9999L) > 0) {
if (ishfield(hdr, "to"))
hp->h_to = addto(hp->h_to, hcontents(hdr));
else if (ishfield(hdr, "subject"))
hp->h_subject = addone(hp->h_subject, hcontents(hdr));
else if (ishfield(hdr, "cc"))
hp->h_cc = addto(hp->h_cc, hcontents(hdr));
else if (ishfield(hdr, "bcc"))
hp->h_bcc = addto(hp->h_bcc, hcontents(hdr));
else if (ishfield(hdr, "default-options"))
hp->h_defopt = addone(hp->h_defopt, hcontents(hdr));
else
hp->h_others = Xaddone(hp->h_others, hdr);
hp->h_seq++;
}
if ((obuf = fopen(tempMail, "w")) == NULL) {
perror(tempMail);
fclose(fbuf);
goto out;
}
if ((ibuf = fopen(tempMail, "r")) == NULL) {
perror(tempMail);
removefile(tempMail);
fclose(fbuf);
fclose(obuf);
goto out;
}
removefile(tempMail);
if (strlen(hdr) > 0) {
fputs(hdr, obuf);
putc('\n', obuf);
}
while ((t = getc(fbuf)) != EOF)
putc(t, obuf);
fclose(fbuf);
fclose(newo);
fclose(newi);
newo = obuf;
newi = ibuf;
out:
return(newo);
}
/*
* Pipe the message through the command.
* Old message is on stdin of command;
* New message collected from stdout.
* Sh -c must return 0 to accept the new message.
*/
static FILE *
mespipe(ibuf, obuf, cmd)
FILE *ibuf, *obuf;
char cmd[];
{
register FILE *ni, *no;
pid_t pid;
int s;
void (*sigint)();
char *Shell;
newi = ibuf;
if ((no = fopen(tempEdit, "w")) == NULL) {
perror(tempEdit);
return(obuf);
}
if ((ni = fopen(tempEdit, "r")) == NULL) {
perror(tempEdit);
fclose(no);
removefile(tempEdit);
return(obuf);
}
removefile(tempEdit);
fflush(obuf);
rewind(ibuf);
if ((Shell = value("SHELL")) == NULL || *Shell=='\0')
Shell = SHELL;
if ((pid = fork()) == (pid_t)-1) {
perror("fork");
goto err;
}
if (pid == 0) {
/*
* stdin = current message.
* stdout = new message.
*/
sigchild();
close(0);
dup(fileno(ibuf));
close(1);
dup(fileno(no));
for (s = 4; s < 15; s++)
close(s);
execlp(Shell, Shell, "-c", cmd, (char *)0);
perror(Shell);
_exit(1);
}
sigint = sigset(SIGINT, SIG_IGN);
while (wait(&s) != pid)
;
sigset(SIGINT, sigint);
if (s != 0 || pid == (pid_t)-1) {
fprintf(stderr, "\"%s\" failed!?\n", cmd);
goto err;
}
if (fsize(ni) == 0) {
fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
goto err;
}
/*
* Take new files.
*/
newi = ni;
fclose(ibuf);
fclose(obuf);
return(no);
err:
fclose(no);
fclose(ni);
return(obuf);
}
/*
* Interpolate the named messages into the current
* message, preceding each line with a tab.
* Return a count of the number of characters now in
* the message, or -1 if an error is encountered writing
* the message temporary. The flag argument is 'm' if we
* should shift over and 'f' if not.
*/
static int
forward(ms, obuf, f)
char ms[];
FILE *obuf;
{
register int *msgvec, *ip;
msgvec = (int *) salloc((msgCount+1) * sizeof *msgvec);
if (msgvec == NOINTPTR)
return(0);
if (getmsglist(ms, msgvec, 0) < 0)
return(0);
if (*msgvec == NULL) {
*msgvec = first(0, MMNORM);
if (*msgvec == NULL) {
printf("No appropriate messages\n");
return(0);
}
msgvec[1] = NULL;
}
printf("Interpolating:");
for (ip = msgvec; *ip != NULL; ip++) {
touch(*ip);
printf(" %d", *ip);
if (f == 'm') {
if (transmit(&message[*ip-1], obuf) < 0L) {
perror(tempMail);
return(-1);
}
} else
if (send(&message[*ip-1], obuf, 0) < 0) {
perror(tempMail);
return(-1);
}
}
printf("\n");
return(0);
}
/*
* Send message described by the passed pointer to the
* passed output buffer. Insert a tab in front of each
* line. Return a count of the characters sent, or -1
* on error.
*/
static long
transmit(mailp, obuf)
struct message *mailp;
FILE *obuf;
{
register struct message *mp;
register int ch;
register long c, n;
int bol;
FILE *ibuf;
char *mprefix = value("mprefix");
if (!mprefix)
mprefix = "\t";
mp = mailp;
ibuf = setinput(mp);
c = mp->m_size;
n = c;
bol = 1;
while (c-- > 0L) {
if (bol) {
bol = 0;
fputs(mprefix, obuf);
n++;
if (ferror(obuf)) {
perror("/tmp");
return(-1L);
}
}
ch = getc(ibuf);
if (ch == '\n')
bol++;
putc(ch, obuf);
if (ferror(obuf)) {
perror("/tmp");
return(-1L);
}
}
return(n);
}
/*
* Print (continue) when continued after ^Z.
*/
#ifdef SIGCONT
/*ARGSUSED*/
static void
collcont(s)
{
printf("(continue)\n",s); /* reference s to suppress warning -- adb */
fflush(stdout);
}
#endif /* SIGCONT */
/*
* On interrupt, go here to save the partial
* message on ~/dead.letter.
* Then restore signals and execute the normal
* signal routine. We only come here if signals
* were previously set anyway.
*/
static void
collrub(s)
{
register FILE *dbuf;
register int c;
register char *deadletter = Getf("DEAD");
long cc, lc;
if (s == SIGHUP)
sigignore(SIGHUP);
if (s == SIGINT && hadintr == 0) {
hadintr++;
clrbuf(stdout);
printf("\n(Interrupt -- one more to kill letter)\n");
sigrelse(s);
longjmp(coljmp, 1);
}
fclose(newo);
rewind(newi);
if (s == SIGINT && value("save")==NOSTR || fsize(newi) == 0)
goto done;
if ((dbuf = fopen(deadletter, "w")) == NULL) { /* old behavior -- adb */
perror(deadletter);
goto done;
}
chmod(deadletter, DEADPERM);
printf("\"%s\" ", deadletter);
fflush(stdout);
puthead(savehp, dbuf, GMASK);
for (cc = lc = 0; (c = getc(newi)) != EOF; cc++)
if (putc(c, dbuf) == '\n')
lc++;
fclose(dbuf);
printf("%ld/%ld\n", lc, cc);
done:
fclose(newi);
resetsigs(1);
if (rcvmode) {
if (s == SIGHUP)
hangup();
else
stop(s);
}
else
exit(1);
}
/*
* Acknowledge an interrupt signal from the tty by typing an @
*/
static void
intack(s)
{
(void) s;
puts("@");
fflush(stdout);
clearerr(stdin);
longjmp(coljmp,1);
}
/* Read line from stdin, noting any NULL characters.
Return the number of characters read. Note that the buffer
passed must be 1 larger than "size" for the trailing NUL byte.
*/
int
getline(line,size,f,hasnulls)
char *line;
int size;
FILE *f;
int *hasnulls;
{
register int i, ch;
for (i = 0; (i < size) && ((ch=getc(f)) != EOF); ) {
if ( ch == '\0' )
*hasnulls = 1;
if ((line[i++] = ch) == '\n') break;
}
line[i] = '\0';
return(i);
}
void
savedead(s)
{
(void) s;
collrub(SIGINT);
exit(1);
/* NOTREACHED */
}
/*
* Add a list of addresses to the end of a header entry field.
*/
char *
addto(hf, news)
char hf[], news[];
{
char name[LINESIZE];
int comma = docomma(news);
while (news = yankword(news, name, comma)) {
strcat(name, ", ");
hf = addone(hf, name);
}
return hf;
}
/*
* Add a string to the end of a header entry field.
*/
char *
addone(hf, news)
char hf[], news[];
{
register char *cp, *cp2, *linebuf;
if (hf == NOSTR)
hf = "";
if (*news == '\0')
return(hf);
linebuf = salloc((unsigned)(strlen(hf) + strlen(news) + 2));
for (cp = hf; any(*cp, " \t"); cp++)
;
for (cp2 = linebuf; *cp;)
*cp2++ = *cp++;
if (cp2 > linebuf && cp2[-1] != ' ')
*cp2++ = ' ';
for (cp = news; any(*cp, " \t"); cp++)
;
while (*cp != '\0')
*cp2++ = *cp++;
*cp2 = '\0';
return(linebuf);
}
static int nptrs(hf)
char **hf;
{
register int i;
if (!hf)
return 0;
for (i = 0; *hf; hf++)
i++;
return i;
}
/*
* Add a non-standard header to the end of the non-standard headers.
*/
static char **
Xaddone(hf, news)
char **hf, news[];
{
register char *linebuf;
char **ohf = hf;
int nhf = nptrs(hf);
if (hf == NOSTRPTR)
hf = (char**)salloc(sizeof(char*) * 2);
else
hf = (char**)srealloc(hf, sizeof(char*) * (nhf + 2));
if (hf == NOSTRPTR) {
fprintf(stderr, "No room, header lost: %s\n", news);
return(ohf);
}
linebuf = salloc((unsigned)(strlen(news) + 1));
strcpy(linebuf, news);
hf[nhf++] = linebuf;
hf[nhf] = NOSTR;
return(hf);
}
static void
cpout( str, ofd )
char *str;
FILE *ofd;
{
register char *cp = str;
while ( *cp ) {
if ( *cp == '\\' ) {
switch ( *(cp+1) ) {
case 'n':
putc('\n',ofd);
cp++;
break;
case 't':
putc('\t',ofd);
cp++;
break;
default:
putc('\\',ofd);
}
}
else {
putc(*cp,ofd);
}
cp++;
}
putc('\n',ofd);
fflush(ofd);
}
static void
xhalt()
{
fclose(newo);
fclose(newi);
sigset(SIGINT, savesig);
sigset(SIGHUP, savehup);
if (rcvmode)
stop(0);
exit(1);
/* NOTREACHED */
}
/*
Strip the nulls from a buffer of length n
*/
static int
stripnulls(linebuf, nread)
register char *linebuf;
register int nread;
{
register int i, j;
for (i = 0; i < nread; i++)
if (linebuf[i] == '\0')
break;
for (j = i; j < nread; j++)
if (linebuf[j] != '\0')
linebuf[i++] = linebuf[j];
linebuf[i] = '\0';
return i;
}