734 lines
12 KiB
C
734 lines
12 KiB
C
#ifndef lint
|
|
static char *sccsid = "@(#)aux.c 1.1 92/07/30 SMI"; /* from S5R2 1.1 */
|
|
#endif
|
|
|
|
#include "rcv.h"
|
|
#include <sys/stat.h>
|
|
#include <ctype.h>
|
|
|
|
/*
|
|
* mailx -- a modified version of a University of California at Berkeley
|
|
* mail program
|
|
*
|
|
* Auxiliary functions.
|
|
*/
|
|
|
|
/*
|
|
* Return a pointer to a dynamic copy of the argument.
|
|
*/
|
|
|
|
char *
|
|
savestr(str)
|
|
char *str;
|
|
{
|
|
register char *cp, *cp2, *top;
|
|
|
|
for (cp = str; *cp; cp++)
|
|
;
|
|
top = salloc(cp-str + 1);
|
|
if (top == NOSTR)
|
|
return(NOSTR);
|
|
for (cp = str, cp2 = top; *cp; cp++)
|
|
*cp2++ = *cp;
|
|
*cp2 = 0;
|
|
return(top);
|
|
}
|
|
|
|
/*
|
|
* Announce a fatal error and die.
|
|
*/
|
|
|
|
panic(str)
|
|
char *str;
|
|
{
|
|
fprintf(stderr, "Mail: panic: %s\n", str);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* 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(mesg)
|
|
{
|
|
register struct message *mp;
|
|
|
|
if (mesg < 1 || mesg > msgCount)
|
|
return;
|
|
mp = &message[mesg-1];
|
|
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; ap++)
|
|
;
|
|
return(ap-argv);
|
|
}
|
|
|
|
/*
|
|
* Return the desired header line from the passed message
|
|
* pointer (or NOSTR if the desired header field is not available).
|
|
* Read all the header lines and concatenate multiple instances of
|
|
* the requested header.
|
|
*/
|
|
|
|
char *
|
|
hfield(field, mp)
|
|
char field[];
|
|
struct message *mp;
|
|
{
|
|
register FILE *ibuf;
|
|
char linebuf[LINESIZE];
|
|
register int lc;
|
|
register char *hdr = NOSTR;
|
|
|
|
ibuf = setinput(mp);
|
|
if ((lc = mp->m_lines) <= 0)
|
|
return(NOSTR);
|
|
if (readline(ibuf, linebuf) < 0)
|
|
return(NOSTR);
|
|
lc--;
|
|
do {
|
|
lc = gethfield(ibuf, linebuf, lc);
|
|
if (lc == -1)
|
|
return(hdr);
|
|
if (ishfield(linebuf, field)) {
|
|
if (hdr == NOSTR) {
|
|
hdr = savestr(hcontents(linebuf));
|
|
} else {
|
|
register char *s, *p;
|
|
|
|
s = hcontents(linebuf);
|
|
p = salloc(strlen(hdr) + strlen(s) + 2);
|
|
if (p == NOSTR)
|
|
return (NOSTR);
|
|
strcpy(p, hdr);
|
|
strcat(p, " ");
|
|
strcat(p, s);
|
|
hdr = p;
|
|
}
|
|
}
|
|
} while (lc > 0);
|
|
return(hdr);
|
|
}
|
|
|
|
/*
|
|
* Return the next header field found in the given message.
|
|
* Return > 0 if something found, <= 0 elsewise.
|
|
* Must deal with \ continuations & other such fraud.
|
|
*/
|
|
|
|
gethfield(f, linebuf, rem)
|
|
register FILE *f;
|
|
char linebuf[];
|
|
register int rem;
|
|
{
|
|
char line2[LINESIZE];
|
|
#ifdef CANTELL
|
|
long loc;
|
|
#endif
|
|
register char *cp, *cp2;
|
|
register int c;
|
|
|
|
|
|
for (;;) {
|
|
if (rem <= 0)
|
|
return(-1);
|
|
if (readline(f, linebuf) < 0)
|
|
return(-1);
|
|
rem--;
|
|
if (strlen(linebuf) == 0)
|
|
return(-1);
|
|
if (isspace(linebuf[0]))
|
|
continue;
|
|
if (linebuf[0] == '>')
|
|
continue;
|
|
cp = index(linebuf, ':');
|
|
if (cp == NOSTR)
|
|
continue;
|
|
for (cp2 = linebuf; cp2 < cp; cp2++)
|
|
if (isdigit(*cp2))
|
|
continue;
|
|
|
|
/*
|
|
* I guess we got a headline.
|
|
* Handle wraparounding
|
|
*/
|
|
|
|
for (;;) {
|
|
if (rem <= 0)
|
|
break;
|
|
#ifdef CANTELL
|
|
loc = ftell(f);
|
|
if (readline(f, line2) < 0)
|
|
break;
|
|
rem--;
|
|
if (!isspace(line2[0])) {
|
|
fseek(f, loc, 0);
|
|
rem++;
|
|
break;
|
|
}
|
|
#else
|
|
c = getc(f);
|
|
ungetc(c, f);
|
|
if (!isspace(c) || c == '\n')
|
|
break;
|
|
if (readline(f, line2) < 0)
|
|
break;
|
|
rem--;
|
|
#endif
|
|
cp2 = line2;
|
|
for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++)
|
|
;
|
|
if (strlen(linebuf) + strlen(cp2) >= LINESIZE-2)
|
|
break;
|
|
cp = &linebuf[strlen(linebuf)];
|
|
while (cp > linebuf &&
|
|
(isspace(cp[-1]) || cp[-1] == '\\'))
|
|
cp--;
|
|
*cp++ = ' ';
|
|
for (cp2 = line2; *cp2 != 0 && isspace(*cp2); cp2++)
|
|
;
|
|
strcpy(cp, cp2);
|
|
}
|
|
if ((c = strlen(linebuf)) > 0) {
|
|
cp = &linebuf[c-1];
|
|
while (cp > linebuf && isspace(*cp))
|
|
cp--;
|
|
*++cp = 0;
|
|
}
|
|
return(rem);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* Check whether the passed line is a header line of
|
|
* the desired breed.
|
|
*/
|
|
|
|
ishfield(linebuf, field)
|
|
char linebuf[], field[];
|
|
{
|
|
register char *cp;
|
|
register int c;
|
|
|
|
if ((cp = index(linebuf, ':')) == NOSTR)
|
|
return(0);
|
|
if (cp == linebuf)
|
|
return(0);
|
|
cp--;
|
|
while (cp > linebuf && isspace(*cp))
|
|
cp--;
|
|
c = *++cp;
|
|
*cp = 0;
|
|
if (icequal(linebuf ,field)) {
|
|
*cp = c;
|
|
return(1);
|
|
}
|
|
*cp = c;
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Extract the non label information from the given header field
|
|
* and return it.
|
|
*/
|
|
|
|
char *
|
|
hcontents(hf)
|
|
char hf[];
|
|
{
|
|
register char *cp;
|
|
|
|
if ((cp = index(hf, ':')) == NOSTR)
|
|
return(NOSTR);
|
|
cp++;
|
|
while (*cp && isspace(*cp))
|
|
cp++;
|
|
return(cp);
|
|
}
|
|
|
|
/*
|
|
* Compare two strings, ignoring case.
|
|
*/
|
|
|
|
icequal(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
|
|
while (raise(*s1++) == raise(*s2))
|
|
if (*s2++ == 0)
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Copy a string, lowercasing it as we go.
|
|
*/
|
|
istrcpy(dest, src)
|
|
char *dest, *src;
|
|
{
|
|
register char *cp, *cp2;
|
|
|
|
cp2 = dest;
|
|
cp = src;
|
|
do {
|
|
*cp2++ = little(*cp);
|
|
} while (*cp++ != 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 = -1; /* 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(name)
|
|
char name[];
|
|
{
|
|
register FILE *fi;
|
|
register char *cp;
|
|
|
|
if ((cp = expand(name)) == NOSTR)
|
|
return(1);
|
|
if ((fi = fopen(cp, "r")) == NULL) {
|
|
perror(cp);
|
|
return(1);
|
|
}
|
|
if (ssp >= NOFILE - 2) {
|
|
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;
|
|
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;
|
|
}
|
|
fclose(input);
|
|
if (cond != CANY)
|
|
printf("Unmatched \"if\"\n");
|
|
cond = sstack[ssp].s_cond;
|
|
loading = sstack[ssp].s_loading;
|
|
input = sstack[ssp--].s_file;
|
|
if (ssp < 0)
|
|
sourcing = loading;
|
|
}
|
|
|
|
/*
|
|
* Touch the indicated file.
|
|
* This is nifty for the shell.
|
|
* If we have the utime() system call, this is better served
|
|
* by using that, since it will work for empty files.
|
|
* On non-utime systems, we must sleep a second, then read.
|
|
*/
|
|
|
|
alter(name)
|
|
char name[];
|
|
{
|
|
#ifdef UTIME
|
|
struct stat statb;
|
|
long time();
|
|
time_t time_p[2];
|
|
#else
|
|
register int pid, f;
|
|
char w;
|
|
#endif UTIME
|
|
|
|
#ifdef UTIME
|
|
if (stat(name, &statb) < 0)
|
|
return;
|
|
time_p[0] = time((long *) 0) + 1;
|
|
time_p[1] = statb.st_mtime;
|
|
if (time_p[0] <= time_p[1]) { /* may be true on nfs */
|
|
time_p[0] = time_p[1] + 1;
|
|
}
|
|
utime(name, time_p);
|
|
sleep(1); /* really want "sleep until time_p[0]" */
|
|
#else
|
|
sleep(1);
|
|
if ((f = open(name, 0)) < 0)
|
|
return;
|
|
read(f, &w, 1);
|
|
exit(0);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
cp = skin(name1(mp, reptype));
|
|
if (reptype != 0)
|
|
return(cp);
|
|
return(striproute(cp));
|
|
}
|
|
|
|
/*
|
|
* Strip an address of all host names, both UUCP and Internet-style.
|
|
* Assumes that all UUCP names pile up on the left, and all Internet-style
|
|
* names pile up on the right.
|
|
* Modifies the string that it is passed.
|
|
*/
|
|
char *
|
|
striphosts(addr)
|
|
char *addr;
|
|
{
|
|
register char *cp, *cp2;
|
|
|
|
if ((cp = rindex(addr,'!')) != NULL)
|
|
cp++;
|
|
else
|
|
cp = addr;
|
|
/*
|
|
* Now strip off all Internet-type
|
|
* hosts.
|
|
*/
|
|
if ((cp2 = index(cp, '%')) == NOSTR)
|
|
cp2 = index(cp, '@');
|
|
if (cp2 != NOSTR)
|
|
*cp2 = '\0';
|
|
return(cp);
|
|
}
|
|
|
|
/*
|
|
* Strip an address of all but the last UUCP host name.
|
|
* Assumes that all UUCP names pile up on the left.
|
|
*/
|
|
char *
|
|
striproute(addr)
|
|
char *addr;
|
|
{
|
|
register char *cp;
|
|
|
|
if ((cp = rindex(addr, '!')) != NOSTR) {
|
|
cp--;
|
|
while (cp > addr && *cp != '!')
|
|
cp--;
|
|
if (*cp == '!')
|
|
cp++;
|
|
} else
|
|
cp = addr;
|
|
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];
|
|
int nesting;
|
|
|
|
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 '(':
|
|
/*
|
|
* Start of a "comment".
|
|
* Ignore it.
|
|
*/
|
|
nesting = 1;
|
|
while ((c = *cp) != 0) {
|
|
cp++;
|
|
switch (c) {
|
|
case '\\':
|
|
if (*cp == 0)
|
|
goto outcm;
|
|
cp++;
|
|
break;
|
|
case '(':
|
|
nesting++;
|
|
break;
|
|
|
|
case ')':
|
|
--nesting;
|
|
break;
|
|
}
|
|
|
|
if (nesting <= 0)
|
|
break;
|
|
}
|
|
outcm:
|
|
lastsp = 0;
|
|
break;
|
|
|
|
case '"':
|
|
/*
|
|
* Start of a "quoted-string".
|
|
* Copy it in its entirety.
|
|
*/
|
|
while ((c = *cp) != 0) {
|
|
cp++;
|
|
switch (c) {
|
|
case '\\':
|
|
if ((c = *cp) == 0)
|
|
goto outqs;
|
|
cp++;
|
|
break;
|
|
case '"':
|
|
goto outqs;
|
|
}
|
|
*cp2++ = c;
|
|
}
|
|
outqs:
|
|
lastsp = 0;
|
|
break;
|
|
|
|
case ' ':
|
|
lastsp = 1;
|
|
break;
|
|
|
|
case ',':
|
|
*cp2++ = ',';
|
|
*cp2++ = ' ';
|
|
bufend = cp2;
|
|
lastsp = 0;
|
|
break;
|
|
|
|
case '<':
|
|
cp2 = bufend;
|
|
gotlt++;
|
|
lastsp = 0;
|
|
break;
|
|
|
|
case '>':
|
|
if (gotlt) {
|
|
gotlt = 0;
|
|
while (*cp != ',' && *cp != 0)
|
|
cp++;
|
|
if (*cp == 0 )
|
|
goto done;
|
|
*cp2++ = ',';
|
|
*cp2++ = ' ';
|
|
bufend = cp2;
|
|
break;
|
|
}
|
|
|
|
/* Fall into . . . */
|
|
|
|
default:
|
|
if (lastsp) {
|
|
lastsp = 0;
|
|
*cp2++ = ' ';
|
|
}
|
|
*cp2++ = c;
|
|
break;
|
|
}
|
|
}
|
|
done:
|
|
*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
|
|
*/
|
|
|
|
/*ARGSUSED*/
|
|
char *
|
|
name1(mp, reptype)
|
|
register struct message *mp;
|
|
{
|
|
char namebuf[LINESIZE];
|
|
char linebuf[LINESIZE];
|
|
register char *cp, *cp2;
|
|
register FILE *ibuf;
|
|
int first = 1;
|
|
|
|
#ifdef SENDMAIL
|
|
if ((cp = hfield("from", mp)) != NOSTR)
|
|
return(cp);
|
|
if (reptype == 0 && (cp = hfield("sender", mp)) != NOSTR)
|
|
return(cp);
|
|
#endif
|
|
ibuf = setinput(mp);
|
|
copy("", namebuf);
|
|
if (readline(ibuf, linebuf) <= 0)
|
|
return(savestr(namebuf));
|
|
newname:
|
|
for (cp = linebuf; *cp != ' '; cp++)
|
|
;
|
|
while (any(*cp, " \t"))
|
|
cp++;
|
|
for (cp2 = &namebuf[strlen(namebuf)]; *cp && !any(*cp, " \t") &&
|
|
cp2-namebuf < LINESIZE-1; *cp2++ = *cp++)
|
|
;
|
|
*cp2 = '\0';
|
|
nextname: /* ARH */
|
|
if (readline(ibuf, linebuf) <= 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) {
|
|
copy(cp, namebuf);
|
|
first = 0;
|
|
} else
|
|
strcpy(rindex(namebuf, '!')+1, cp);
|
|
strcat(namebuf, "!");
|
|
goto newname;
|
|
}
|
|
cp++;
|
|
}
|
|
goto nextname; /* ARH */
|
|
}
|
|
|
|
/*
|
|
* Are any of the characters in the two strings the same?
|
|
*/
|
|
|
|
anyof(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
register int c;
|
|
|
|
while (c = *s1++)
|
|
if (any(c, s2))
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* See if the given header field is supposed to be ignored.
|
|
*/
|
|
isign(field)
|
|
char *field;
|
|
{
|
|
char realfld[BUFSIZ];
|
|
|
|
/*
|
|
* Lower-case the string, so that "Status" and "status"
|
|
* will hash to the same place.
|
|
*/
|
|
istrcpy(realfld, field);
|
|
|
|
if (nretained > 0)
|
|
return (!member(realfld, retain));
|
|
else
|
|
return (member(realfld, ignore));
|
|
}
|
|
|
|
member(realfield, table)
|
|
register char *realfield;
|
|
register struct ignore **table;
|
|
{
|
|
register struct ignore *igp;
|
|
|
|
for (igp = table[hash(realfield)]; igp != 0; igp = igp->i_link)
|
|
if (equal(igp->i_field, realfield))
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|