summaryrefslogtreecommitdiffstats
path: root/mail_cmds/mail/aux.c
diff options
context:
space:
mode:
Diffstat (limited to 'mail_cmds/mail/aux.c')
-rw-r--r--mail_cmds/mail/aux.c635
1 files changed, 635 insertions, 0 deletions
diff --git a/mail_cmds/mail/aux.c b/mail_cmds/mail/aux.c
new file mode 100644
index 0000000..f1a621f
--- /dev/null
+++ b/mail_cmds/mail/aux.c
@@ -0,0 +1,635 @@
+/*
+ * 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
+#if 0
+static char sccsid[] = "@(#)aux.c 8.1 (Berkeley) 6/6/93";
+#endif
+static const char rcsid[] =
+ "$FreeBSD: src/usr.bin/mail/aux.c,v 1.13 2002/08/25 13:22:47 charnier Exp $";
+#endif /* not lint */
+
+#include <sys/cdefs.h>
+#include <sys/time.h>
+
+#include "rcv.h"
+#include "extern.h"
+
+/*
+ * Mail -- a mail program
+ *
+ * Auxiliary functions.
+ */
+
+static char *save2str(char *, char *);
+
+/*
+ * 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)) != NULL)
+ 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)) != NULL) {
+ if (oldsize) {
+ bcopy(old, new, oldsize);
+ new[oldsize - 1] = ' ';
+ }
+ bcopy(str, new + oldsize, newsize);
+ }
+ return (new);
+}
+
+/*
+ * 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)
+ 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 (S_ISDIR(sbuf.st_mode));
+}
+
+/*
+ * Count the number of arguments in the given string raw list.
+ */
+int
+argcount(argv)
+ char **argv;
+{
+ char **ap;
+
+ for (ap = argv; *ap++ != NULL;)
+ ;
+ return (ap - argv - 1);
+}
+
+/*
+ * Return the desired header line from the passed message
+ * pointer (or NULL if the desired header field is not available).
+ */
+char *
+hfield(field, mp)
+ const char *field;
+ struct message *mp;
+{
+ FILE *ibuf;
+ char linebuf[LINESIZE];
+ int lc;
+ char *hfield;
+ char *colon, *oldhfield = NULL;
+
+ ibuf = setinput(mp);
+ if ((lc = mp->m_lines - 1) < 0)
+ return (NULL);
+ if (readline(ibuf, linebuf, LINESIZE) < 0)
+ return (NULL);
+ while (lc > 0) {
+ if ((lc = gethfield(ibuf, linebuf, lc, &colon)) < 0)
+ return (oldhfield);
+ if ((hfield = ishfield(linebuf, colon, field)) != NULL)
+ 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)
+ FILE *f;
+ char linebuf[];
+ int rem;
+ char **colon;
+{
+ char line2[LINESIZE];
+ char *cp, *cp2;
+ int c;
+
+ for (;;) {
+ if (--rem < 0)
+ return (-1);
+ if ((c = readline(f, linebuf, LINESIZE)) <= 0)
+ return (-1);
+ for (cp = linebuf; isprint((unsigned char)*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[];
+ char *colon;
+ const char *field;
+{
+ 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 and lowercase the result.
+ * dsize: space left in buffer (including space for NULL)
+ */
+void
+istrncpy(dest, src, dsize)
+ char *dest;
+ const char *src;
+ size_t dsize;
+{
+
+ strlcpy(dest, src, dsize);
+ while (*dest) {
+ *dest = tolower((unsigned char)*dest);
+ dest++;
+ }
+}
+
+/*
+ * 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. */
+};
+#define SSTACK_SIZE 64 /* XXX was NOFILE. */
+static struct sstack sstack[SSTACK_SIZE];
+
+/*
+ * 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)) == NULL)
+ return (1);
+ if ((fi = Fopen(cp, "r")) == NULL) {
+ warn("%s", cp);
+ return (1);
+ }
+ if (ssp >= SSTACK_SIZE - 1) {
+ printf("Too much \"sourcing\" going on.\n");
+ (void)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);
+ }
+ (void)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];
+
+ if (stat(name, &sb))
+ return;
+ (void)gettimeofday(&tv[0], (struct timezone *)NULL);
+ tv[0].tv_sec++;
+ TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
+ (void)utimes(name, tv);
+}
+
+/*
+ * 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)
+ struct message *mp;
+ int reptype;
+{
+ char *cp, *cp2;
+
+ cp = skin(name1(mp, reptype));
+ if (reptype != 0 || charcount(cp, '!') < 2)
+ return (cp);
+ cp2 = strrchr(cp, '!');
+ cp2--;
+ while (cp2 > cp && *cp2 != '!')
+ cp2--;
+ if (*cp2 == '!')
+ return (cp2 + 1);
+ return (cp);
+}
+
+/*
+ * Start of a "comment".
+ * Ignore it.
+ */
+char *
+skip_comment(cp)
+ char *cp;
+{
+ int 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;
+{
+ char *nbuf, *bufend, *cp, *cp2;
+ int c, gotlt, lastsp;
+
+ if (name == NULL)
+ return (NULL);
+ if (strchr(name, '(') == NULL && strchr(name, '<') == NULL
+ && strchr(name, ' ') == NULL)
+ return (name);
+
+ /* We assume that length(input) <= length(output) */
+ if ((nbuf = malloc(strlen(name) + 1)) == NULL)
+ err(1, "Out of memory");
+ gotlt = 0;
+ lastsp = 0;
+ bufend = nbuf;
+ for (cp = name, cp2 = bufend; (c = *cp++) != '\0'; ) {
+ switch (c) {
+ case '(':
+ cp = skip_comment(cp);
+ lastsp = 0;
+ break;
+
+ case '"':
+ /*
+ * Start of a "quoted-string".
+ * Copy it in its entirety.
+ */
+ while ((c = *cp) != '\0') {
+ cp++;
+ if (c == '"')
+ break;
+ if (c != '\\')
+ *cp2++ = c;
+ else if ((c = *cp) != '\0') {
+ *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) != '\0' && c != ',') {
+ cp++;
+ if (c == '(')
+ cp = skip_comment(cp);
+ else if (c == '"')
+ while ((c = *cp) != '\0') {
+ cp++;
+ if (c == '"')
+ break;
+ if (c == '\\' && *cp != '\0')
+ cp++;
+ }
+ }
+ lastsp = 0;
+ break;
+ }
+ /* FALLTHROUGH */
+
+ default:
+ if (lastsp) {
+ lastsp = 0;
+ *cp2++ = ' ';
+ }
+ *cp2++ = c;
+ if (c == ',' && *cp == ' ' && !gotlt) {
+ *cp2++ = ' ';
+ while (*++cp == ' ')
+ ;
+ lastsp = 0;
+ bufend = cp2;
+ }
+ }
+ }
+ *cp2 = '\0';
+
+ if ((cp = realloc(nbuf, strlen(nbuf) + 1)) != NULL)
+ nbuf = cp;
+ return (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)
+ struct message *mp;
+ int reptype;
+{
+ char namebuf[LINESIZE];
+ char linebuf[LINESIZE];
+ char *cp, *cp2;
+ FILE *ibuf;
+ int first = 1;
+
+ if ((cp = hfield("from", mp)) != NULL)
+ return (cp);
+ if (reptype == 0 && (cp = hfield("sender", mp)) != NULL)
+ return (cp);
+ ibuf = setinput(mp);
+ namebuf[0] = '\0';
+ if (readline(ibuf, linebuf, LINESIZE) < 0)
+ return (savestr(namebuf));
+newname:
+ for (cp = linebuf; *cp != '\0' && *cp != ' '; cp++)
+ ;
+ for (; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+ for (cp2 = &namebuf[strlen(namebuf)];
+ *cp != '\0' && *cp != ' ' && *cp != '\t' &&
+ cp2 < namebuf + LINESIZE - 1;)
+ *cp2++ = *cp++;
+ *cp2 = '\0';
+ if (readline(ibuf, linebuf, LINESIZE) < 0)
+ return (savestr(namebuf));
+ if ((cp = strchr(linebuf, 'F')) == NULL)
+ return (savestr(namebuf));
+ if (strncmp(cp, "From", 4) != 0)
+ return (savestr(namebuf));
+ while ((cp = strchr(cp, 'r')) != NULL) {
+ if (strncmp(cp, "remote", 6) == 0) {
+ if ((cp = strchr(cp, 'f')) == NULL)
+ break;
+ if (strncmp(cp, "from", 4) != 0)
+ break;
+ if ((cp = strchr(cp, ' ')) == NULL)
+ break;
+ cp++;
+ if (first) {
+ cp2 = namebuf;
+ first = 0;
+ } else
+ cp2 = strrchr(namebuf, '!') + 1;
+ strlcpy(cp2, cp, sizeof(namebuf) - (cp2 - namebuf) - 1);
+ strcat(namebuf, "!");
+ goto newname;
+ }
+ cp++;
+ }
+ return (savestr(namebuf));
+}
+
+/*
+ * Count the occurances of c in str
+ */
+int
+charcount(str, c)
+ char *str;
+ int c;
+{
+ char *cp;
+ int i;
+
+ for (i = 0, cp = str; *cp != '\0'; cp++)
+ if (*cp == c)
+ i++;
+ return (i);
+}
+
+/*
+ * See if the given header field is supposed to be ignored.
+ */
+int
+isign(field, ignore)
+ const char *field;
+ struct ignoretab ignore[2];
+{
+ char realfld[LINESIZE];
+
+ if (ignore == ignoreall)
+ return (1);
+ /*
+ * Lower-case the string, so that "Status" and "status"
+ * will hash to the same place.
+ */
+ istrncpy(realfld, field, sizeof(realfld));
+ if (ignore[1].i_count > 0)
+ return (!member(realfld, ignore + 1));
+ else
+ return (member(realfld, ignore));
+}
+
+int
+member(realfield, table)
+ char *realfield;
+ struct ignoretab *table;
+{
+ struct ignore *igp;
+
+ for (igp = table->i_head[hash(realfield)]; igp != NULL; igp = igp->i_link)
+ if (*igp->i_field == *realfield &&
+ equal(igp->i_field, realfield))
+ return (1);
+ return (0);
+}
generated by cgit v1.2.3-56-ge451 (git 2.39.0) at 2024-06-18 14:14:47 +0000