4.3BSD-Reno/src/usr.bin/mail/aux.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)aux.c 5.20 (Berkeley) 6/25/90";
#endif /* not lint */
#include "rcv.h"
#include <sys/stat.h>
#include <sys/time.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;
}
/*
* Announce a fatal error and die.
*/
/*VARARGS1*/
panic(fmt, a, b)
char *fmt;
{
fprintf(stderr, "panic: ");
fprintf(stderr, fmt, a, b);
putc('\n', stderr);
fflush(stdout);
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.
*/
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.
*/
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.
*/
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;
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 NOSTR;
if (hfield = ishfield(linebuf, colon, field))
return savestr(hfield);
}
return NOSTR;
}
/*
* 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.
*/
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.
*/
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).
*/
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.
*/
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.
*/
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.
*/
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;
{
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;
{
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
*/
charcount(str, c)
char *str;
{
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?
*/
anyof(s1, s2)
register char *s1, *s2;
{
while (*s1)
if (index(s2, *s1++))
return 1;
return 0;
}
/*
* Convert c to upper case
*/
raise(c)
register 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.
*/
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));
}
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);
}