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-rw-r--r--usr.bin/mail/aux.c705
1 files changed, 705 insertions, 0 deletions
diff --git a/usr.bin/mail/aux.c b/usr.bin/mail/aux.c
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+++ b/usr.bin/mail/aux.c
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+/*
+ * Copyright (c) 1980, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)aux.c 8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include "rcv.h"
+#include "extern.h"
+
+/*
+ * Mail -- a mail program
+ *
+ * Auxiliary functions.
+ */
+
+/*
+ * Return a pointer to a dynamic copy of the argument.
+ */
+char *
+savestr(str)
+ char *str;
+{
+ char *new;
+ int size = strlen(str) + 1;
+
+ if ((new = salloc(size)) != NOSTR)
+ bcopy(str, new, size);
+ return new;
+}
+
+/*
+ * Make a copy of new argument incorporating old one.
+ */
+char *
+save2str(str, old)
+ char *str, *old;
+{
+ char *new;
+ int newsize = strlen(str) + 1;
+ int oldsize = old ? strlen(old) + 1 : 0;
+
+ if ((new = salloc(newsize + oldsize)) != NOSTR) {
+ if (oldsize) {
+ bcopy(old, new, oldsize);
+ new[oldsize - 1] = ' ';
+ }
+ bcopy(str, new + oldsize, newsize);
+ }
+ return new;
+}
+
+/*
+ * Announce a fatal error and die.
+ */
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+void
+#if __STDC__
+panic(const char *fmt, ...)
+#else
+panic(fmt, va_alist)
+ char *fmt;
+ va_dcl
+#endif
+{
+ va_list ap;
+#if __STDC__
+ va_start(ap, fmt);
+#else
+ va_start(ap);
+#endif
+ (void)fprintf(stderr, "panic: ");
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ (void)fprintf(stderr, "\n");
+ fflush(stderr);
+ abort();
+}
+
+/*
+ * Touch the named message by setting its MTOUCH flag.
+ * Touched messages have the effect of not being sent
+ * back to the system mailbox on exit.
+ */
+void
+touch(mp)
+ register struct message *mp;
+{
+
+ mp->m_flag |= MTOUCH;
+ if ((mp->m_flag & MREAD) == 0)
+ mp->m_flag |= MREAD|MSTATUS;
+}
+
+/*
+ * Test to see if the passed file name is a directory.
+ * Return true if it is.
+ */
+int
+isdir(name)
+ char name[];
+{
+ struct stat sbuf;
+
+ if (stat(name, &sbuf) < 0)
+ return(0);
+ return((sbuf.st_mode & S_IFMT) == S_IFDIR);
+}
+
+/*
+ * Count the number of arguments in the given string raw list.
+ */
+int
+argcount(argv)
+ char **argv;
+{
+ register char **ap;
+
+ for (ap = argv; *ap++ != NOSTR;)
+ ;
+ return ap - argv - 1;
+}
+
+/*
+ * Return the desired header line from the passed message
+ * pointer (or NOSTR if the desired header field is not available).
+ */
+char *
+hfield(field, mp)
+ char field[];
+ struct message *mp;
+{
+ register FILE *ibuf;
+ char linebuf[LINESIZE];
+ register int lc;
+ register char *hfield;
+ char *colon, *oldhfield = NOSTR;
+
+ ibuf = setinput(mp);
+ if ((lc = mp->m_lines - 1) < 0)
+ return NOSTR;
+ if (readline(ibuf, linebuf, LINESIZE) < 0)
+ return NOSTR;
+ while (lc > 0) {
+ if ((lc = gethfield(ibuf, linebuf, lc, &colon)) < 0)
+ return oldhfield;
+ if (hfield = ishfield(linebuf, colon, field))
+ oldhfield = save2str(hfield, oldhfield);
+ }
+ return oldhfield;
+}
+
+/*
+ * Return the next header field found in the given message.
+ * Return >= 0 if something found, < 0 elsewise.
+ * "colon" is set to point to the colon in the header.
+ * Must deal with \ continuations & other such fraud.
+ */
+int
+gethfield(f, linebuf, rem, colon)
+ register FILE *f;
+ char linebuf[];
+ register int rem;
+ char **colon;
+{
+ char line2[LINESIZE];
+ register char *cp, *cp2;
+ register int c;
+
+ for (;;) {
+ if (--rem < 0)
+ return -1;
+ if ((c = readline(f, linebuf, LINESIZE)) <= 0)
+ return -1;
+ for (cp = linebuf; isprint(*cp) && *cp != ' ' && *cp != ':';
+ cp++)
+ ;
+ if (*cp != ':' || cp == linebuf)
+ continue;
+ /*
+ * I guess we got a headline.
+ * Handle wraparounding
+ */
+ *colon = cp;
+ cp = linebuf + c;
+ for (;;) {
+ while (--cp >= linebuf && (*cp == ' ' || *cp == '\t'))
+ ;
+ cp++;
+ if (rem <= 0)
+ break;
+ ungetc(c = getc(f), f);
+ if (c != ' ' && c != '\t')
+ break;
+ if ((c = readline(f, line2, LINESIZE)) < 0)
+ break;
+ rem--;
+ for (cp2 = line2; *cp2 == ' ' || *cp2 == '\t'; cp2++)
+ ;
+ c -= cp2 - line2;
+ if (cp + c >= linebuf + LINESIZE - 2)
+ break;
+ *cp++ = ' ';
+ bcopy(cp2, cp, c);
+ cp += c;
+ }
+ *cp = 0;
+ return rem;
+ }
+ /* NOTREACHED */
+}
+
+/*
+ * Check whether the passed line is a header line of
+ * the desired breed. Return the field body, or 0.
+ */
+
+char*
+ishfield(linebuf, colon, field)
+ char linebuf[], field[];
+ char *colon;
+{
+ register char *cp = colon;
+
+ *cp = 0;
+ if (strcasecmp(linebuf, field) != 0) {
+ *cp = ':';
+ return 0;
+ }
+ *cp = ':';
+ for (cp++; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+ return cp;
+}
+
+/*
+ * Copy a string, lowercasing it as we go.
+ */
+void
+istrcpy(dest, src)
+ register char *dest, *src;
+{
+
+ do {
+ if (isupper(*src))
+ *dest++ = tolower(*src);
+ else
+ *dest++ = *src;
+ } while (*src++ != 0);
+}
+
+/*
+ * The following code deals with input stacking to do source
+ * commands. All but the current file pointer are saved on
+ * the stack.
+ */
+
+static int ssp; /* Top of file stack */
+struct sstack {
+ FILE *s_file; /* File we were in. */
+ int s_cond; /* Saved state of conditionals */
+ int s_loading; /* Loading .mailrc, etc. */
+} sstack[NOFILE];
+
+/*
+ * Pushdown current input file and switch to a new one.
+ * Set the global flag "sourcing" so that others will realize
+ * that they are no longer reading from a tty (in all probability).
+ */
+int
+source(arglist)
+ char **arglist;
+{
+ FILE *fi;
+ char *cp;
+
+ if ((cp = expand(*arglist)) == NOSTR)
+ return(1);
+ if ((fi = Fopen(cp, "r")) == NULL) {
+ perror(cp);
+ return(1);
+ }
+ if (ssp >= NOFILE - 1) {
+ printf("Too much \"sourcing\" going on.\n");
+ Fclose(fi);
+ return(1);
+ }
+ sstack[ssp].s_file = input;
+ sstack[ssp].s_cond = cond;
+ sstack[ssp].s_loading = loading;
+ ssp++;
+ loading = 0;
+ cond = CANY;
+ input = fi;
+ sourcing++;
+ return(0);
+}
+
+/*
+ * Pop the current input back to the previous level.
+ * Update the "sourcing" flag as appropriate.
+ */
+int
+unstack()
+{
+ if (ssp <= 0) {
+ printf("\"Source\" stack over-pop.\n");
+ sourcing = 0;
+ return(1);
+ }
+ Fclose(input);
+ if (cond != CANY)
+ printf("Unmatched \"if\"\n");
+ ssp--;
+ cond = sstack[ssp].s_cond;
+ loading = sstack[ssp].s_loading;
+ input = sstack[ssp].s_file;
+ if (ssp == 0)
+ sourcing = loading;
+ return(0);
+}
+
+/*
+ * Touch the indicated file.
+ * This is nifty for the shell.
+ */
+void
+alter(name)
+ char *name;
+{
+ struct stat sb;
+ struct timeval tv[2];
+ time_t time();
+
+ if (stat(name, &sb))
+ return;
+ tv[0].tv_sec = time((time_t *)0) + 1;
+ tv[1].tv_sec = sb.st_mtime;
+ tv[0].tv_usec = tv[1].tv_usec = 0;
+ (void)utimes(name, tv);
+}
+
+/*
+ * Examine the passed line buffer and
+ * return true if it is all blanks and tabs.
+ */
+int
+blankline(linebuf)
+ char linebuf[];
+{
+ register char *cp;
+
+ for (cp = linebuf; *cp; cp++)
+ if (*cp != ' ' && *cp != '\t')
+ return(0);
+ return(1);
+}
+
+/*
+ * Get sender's name from this message. If the message has
+ * a bunch of arpanet stuff in it, we may have to skin the name
+ * before returning it.
+ */
+char *
+nameof(mp, reptype)
+ register struct message *mp;
+ int reptype;
+{
+ register char *cp, *cp2;
+
+ cp = skin(name1(mp, reptype));
+ if (reptype != 0 || charcount(cp, '!') < 2)
+ return(cp);
+ cp2 = rindex(cp, '!');
+ cp2--;
+ while (cp2 > cp && *cp2 != '!')
+ cp2--;
+ if (*cp2 == '!')
+ return(cp2 + 1);
+ return(cp);
+}
+
+/*
+ * Start of a "comment".
+ * Ignore it.
+ */
+char *
+skip_comment(cp)
+ register char *cp;
+{
+ register nesting = 1;
+
+ for (; nesting > 0 && *cp; cp++) {
+ switch (*cp) {
+ case '\\':
+ if (cp[1])
+ cp++;
+ break;
+ case '(':
+ nesting++;
+ break;
+ case ')':
+ nesting--;
+ break;
+ }
+ }
+ return cp;
+}
+
+/*
+ * Skin an arpa net address according to the RFC 822 interpretation
+ * of "host-phrase."
+ */
+char *
+skin(name)
+ char *name;
+{
+ register int c;
+ register char *cp, *cp2;
+ char *bufend;
+ int gotlt, lastsp;
+ char nbuf[BUFSIZ];
+
+ if (name == NOSTR)
+ return(NOSTR);
+ if (index(name, '(') == NOSTR && index(name, '<') == NOSTR
+ && index(name, ' ') == NOSTR)
+ return(name);
+ gotlt = 0;
+ lastsp = 0;
+ bufend = nbuf;
+ for (cp = name, cp2 = bufend; c = *cp++; ) {
+ switch (c) {
+ case '(':
+ cp = skip_comment(cp);
+ lastsp = 0;
+ break;
+
+ case '"':
+ /*
+ * Start of a "quoted-string".
+ * Copy it in its entirety.
+ */
+ while (c = *cp) {
+ cp++;
+ if (c == '"')
+ break;
+ if (c != '\\')
+ *cp2++ = c;
+ else if (c = *cp) {
+ *cp2++ = c;
+ cp++;
+ }
+ }
+ lastsp = 0;
+ break;
+
+ case ' ':
+ if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ')
+ cp += 3, *cp2++ = '@';
+ else
+ if (cp[0] == '@' && cp[1] == ' ')
+ cp += 2, *cp2++ = '@';
+ else
+ lastsp = 1;
+ break;
+
+ case '<':
+ cp2 = bufend;
+ gotlt++;
+ lastsp = 0;
+ break;
+
+ case '>':
+ if (gotlt) {
+ gotlt = 0;
+ while ((c = *cp) && c != ',') {
+ cp++;
+ if (c == '(')
+ cp = skip_comment(cp);
+ else if (c == '"')
+ while (c = *cp) {
+ cp++;
+ if (c == '"')
+ break;
+ if (c == '\\' && *cp)
+ cp++;
+ }
+ }
+ lastsp = 0;
+ break;
+ }
+ /* Fall into . . . */
+
+ default:
+ if (lastsp) {
+ lastsp = 0;
+ *cp2++ = ' ';
+ }
+ *cp2++ = c;
+ if (c == ',' && !gotlt) {
+ *cp2++ = ' ';
+ for (; *cp == ' '; cp++)
+ ;
+ lastsp = 0;
+ bufend = cp2;
+ }
+ }
+ }
+ *cp2 = 0;
+
+ return(savestr(nbuf));
+}
+
+/*
+ * Fetch the sender's name from the passed message.
+ * Reptype can be
+ * 0 -- get sender's name for display purposes
+ * 1 -- get sender's name for reply
+ * 2 -- get sender's name for Reply
+ */
+char *
+name1(mp, reptype)
+ register struct message *mp;
+ int reptype;
+{
+ char namebuf[LINESIZE];
+ char linebuf[LINESIZE];
+ register char *cp, *cp2;
+ register FILE *ibuf;
+ int first = 1;
+
+ if ((cp = hfield("from", mp)) != NOSTR)
+ return cp;
+ if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR)
+ return cp;
+ ibuf = setinput(mp);
+ namebuf[0] = 0;
+ if (readline(ibuf, linebuf, LINESIZE) < 0)
+ return(savestr(namebuf));
+newname:
+ for (cp = linebuf; *cp && *cp != ' '; cp++)
+ ;
+ for (; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+ for (cp2 = &namebuf[strlen(namebuf)];
+ *cp && *cp != ' ' && *cp != '\t' && cp2 < namebuf + LINESIZE - 1;)
+ *cp2++ = *cp++;
+ *cp2 = '\0';
+ if (readline(ibuf, linebuf, LINESIZE) < 0)
+ return(savestr(namebuf));
+ if ((cp = index(linebuf, 'F')) == NULL)
+ return(savestr(namebuf));
+ if (strncmp(cp, "From", 4) != 0)
+ return(savestr(namebuf));
+ while ((cp = index(cp, 'r')) != NULL) {
+ if (strncmp(cp, "remote", 6) == 0) {
+ if ((cp = index(cp, 'f')) == NULL)
+ break;
+ if (strncmp(cp, "from", 4) != 0)
+ break;
+ if ((cp = index(cp, ' ')) == NULL)
+ break;
+ cp++;
+ if (first) {
+ strcpy(namebuf, cp);
+ first = 0;
+ } else
+ strcpy(rindex(namebuf, '!')+1, cp);
+ strcat(namebuf, "!");
+ goto newname;
+ }
+ cp++;
+ }
+ return(savestr(namebuf));
+}
+
+/*
+ * Count the occurances of c in str
+ */
+int
+charcount(str, c)
+ char *str;
+ int c;
+{
+ register char *cp;
+ register int i;
+
+ for (i = 0, cp = str; *cp; cp++)
+ if (*cp == c)
+ i++;
+ return(i);
+}
+
+/*
+ * Are any of the characters in the two strings the same?
+ */
+int
+anyof(s1, s2)
+ register char *s1, *s2;
+{
+
+ while (*s1)
+ if (index(s2, *s1++))
+ return 1;
+ return 0;
+}
+
+/*
+ * Convert c to upper case
+ */
+int
+raise(c)
+ register int c;
+{
+
+ if (islower(c))
+ return toupper(c);
+ return c;
+}
+
+/*
+ * Copy s1 to s2, return pointer to null in s2.
+ */
+char *
+copy(s1, s2)
+ register char *s1, *s2;
+{
+
+ while (*s2++ = *s1++)
+ ;
+ return s2 - 1;
+}
+
+/*
+ * See if the given header field is supposed to be ignored.
+ */
+int
+isign(field, ignore)
+ char *field;
+ struct ignoretab ignore[2];
+{
+ char realfld[BUFSIZ];
+
+ if (ignore == ignoreall)
+ return 1;
+ /*
+ * Lower-case the string, so that "Status" and "status"
+ * will hash to the same place.
+ */
+ istrcpy(realfld, field);
+ if (ignore[1].i_count > 0)
+ return (!member(realfld, ignore + 1));
+ else
+ return (member(realfld, ignore));
+}
+
+int
+member(realfield, table)
+ register char *realfield;
+ struct ignoretab *table;
+{
+ register struct ignore *igp;
+
+ for (igp = table->i_head[hash(realfield)]; igp != 0; igp = igp->i_link)
+ if (*igp->i_field == *realfield &&
+ equal(igp->i_field, realfield))
+ return (1);
+ return (0);
+}
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