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intrp.c
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intrp.c
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/* intrp.c
*/
/* This software is copyrighted as detailed in the LICENSE file. */
#include "EXTERN.h"
#include "common.h"
#include "list.h"
#include "env.h"
#include "util.h"
#include "util2.h"
#include "search.h"
#include "hash.h"
#include "cache.h"
#include "bits.h"
#include "head.h"
#include "trn.h"
#include "ngdata.h"
#include "nntpclient.h"
#include "datasrc.h"
#include "nntp.h"
#include "artsrch.h"
#include "ng.h"
#include "respond.h"
#include "rcstuff.h"
#include "artio.h"
#include "init.h"
#include "term.h"
#include "final.h"
#include "rthread.h"
#include "rt-select.h"
#include "rt-util.h"
#include "INTERN.h"
#include "intrp.h"
#include "intrp.ih"
#include <netdb.h>
static char* regexp_specials = "^$.*[\\/?%";
char orgname[] = ORGNAME;
#ifdef HAS_UNAME
#include <sys/utsname.h>
struct utsname utsn;
#endif
COMPEX cond_compex;
void
intrp_init(tcbuf, tcbuf_len)
char* tcbuf;
int tcbuf_len;
{
#if HOSTBITS != 0
int i;
#endif
init_compex(&cond_compex);
/* get environmental stuff */
#ifdef NEWS_ADMIN
{
#ifdef HAS_GETPWENT
struct passwd* pwd = getpwnam(NEWS_ADMIN);
if (pwd != NULL)
newsuid = pwd->pw_uid;
#else
#ifdef TILDENAME
char tildenews[2+sizeof NEWS_ADMIN];
strcpy(tildenews, "~");
strcat(tildenews, NEWS_ADMIN);
(void) filexp(tildenews);
#else
... "Define either HAS_GETPWENT or TILDENAME to get NEWS_ADMIN"
#endif /* TILDENAME */
#endif /* HAS_GETPWENT */
}
/* if this is the news admin then load his UID into newsuid */
if (strEQ(loginName,NEWS_ADMIN))
newsuid = getuid();
#endif
if (checkflag) /* that getwd below takes ~1/3 sec. */
return; /* and we do not need it for -c */
trn_getwd(tcbuf, tcbuf_len); /* find working directory name */
origdir = savestr(tcbuf); /* and remember it */
/* name of header file (%h) */
headname = savestr(filexp(HEADNAME));
/* the hostname to use in local-article comparisons */
#if HOSTBITS != 0
i = (HOSTBITS < 2? 2 : HOSTBITS);
hostname = phostname+strlen(phostname)-1;
while (i && hostname != phostname) {
if (*--hostname == '.')
i--;
}
if (*hostname == '.')
hostname++;
#else
hostname = phostname;
#endif
}
/* skip interpolations */
static char*
skipinterp(pattern,stoppers)
register char* pattern;
char* stoppers;
{
#ifdef DEBUG
if (debug & DEB_INTRP)
printf("skipinterp %s (till %s)\n",pattern,stoppers?stoppers:"");
#endif
while (*pattern && (!stoppers || !index(stoppers,*pattern))) {
if (*pattern == '%' && pattern[1]) {
switch_again:
switch (*++pattern) {
case '^':
case '_':
case '\\':
case '\'':
case '>':
case ')':
goto switch_again;
case ':':
pattern++;
while (*pattern
&& (*pattern=='.' || *pattern=='-' || isdigit(*pattern))) {
pattern++;
}
pattern--;
goto switch_again;
case '{':
for (pattern++; *pattern && *pattern != '}'; pattern++)
if (*pattern == '\\')
pattern++;
break;
case '[':
for (pattern++; *pattern && *pattern != ']'; pattern++)
if (*pattern == '\\')
pattern++;
break;
case '(': {
pattern = skipinterp(pattern+1,"!=");
if (!*pattern)
goto getout;
for (pattern++; *pattern && *pattern != '?'; pattern++)
if (*pattern == '\\')
pattern++;
if (!*pattern)
goto getout;
pattern = skipinterp(pattern+1,":)");
if (*pattern == ':')
pattern = skipinterp(pattern+1,")");
break;
}
#ifdef BACKTICK
case '`': {
pattern = skipinterp(pattern+1,"`");
break;
}
#endif
#ifdef PROMPTTTY
case '"':
pattern = skipinterp(pattern+1,"\"");
break;
#endif
default:
break;
}
pattern++;
}
else {
if (*pattern == '^'
&& ((Uchar)pattern[1]>='?' || pattern[1]=='(' || pattern[1]==')'))
pattern += 2;
else if (*pattern == '\\' && pattern[1])
pattern += 2;
else
pattern++;
}
}
getout:
return pattern; /* where we left off */
}
/* interpret interpolations */
char*
dointerp(dest,destsize,pattern,stoppers,cmd)
register char* dest;
register int destsize;
register char* pattern;
char* stoppers;
char* cmd;
{
char* subj_buf = NULL;
char* ngs_buf = NULL;
char* refs_buf = NULL;
char* artid_buf = NULL;
char* reply_buf = NULL;
char* from_buf = NULL;
char* path_buf = NULL;
char* follow_buf = NULL;
char* dist_buf = NULL;
char* line_buf = NULL;
char* line_split = NULL;
char* orig_dest = dest;
register char* s;
register char* h;
register int i;
char scrbuf[8192];
char spfbuf[512];
static char* input_str = NULL;
static int input_siz = 0;
bool upper = FALSE;
bool lastcomp = FALSE;
bool re_quote = FALSE;
int tick_quote = 0;
bool address_parse = FALSE;
bool comment_parse = FALSE;
bool proc_sprintf = FALSE;
int metabit = 0;
#ifdef DEBUG
if (debug & DEB_INTRP)
printf(">dointerp: %s (till %s)\n",pattern,stoppers?stoppers:"");
#endif
while (*pattern && (!stoppers || !index(stoppers,*pattern))) {
if (*pattern == '%' && pattern[1]) {
upper = FALSE;
lastcomp = FALSE;
re_quote = FALSE;
tick_quote = 0;
address_parse = FALSE;
comment_parse = FALSE;
proc_sprintf = FALSE;
for (s=NULL; !s; ) {
switch (*++pattern) {
case '^':
upper = TRUE;
break;
case '_':
lastcomp = TRUE;
break;
case '\\':
re_quote = TRUE;
break;
case '\'':
tick_quote++;
break;
case '>':
address_parse = TRUE;
break;
case ')':
comment_parse = TRUE;
break;
case ':':
proc_sprintf = TRUE;
h = spfbuf;
*h++ = '%';
pattern++; /* Skip over ':' */
while (*pattern
&& (*pattern=='.' || *pattern=='-' || isdigit(*pattern))) {
*h++ = *pattern++;
}
*h++ = 's';
*h++ = '\0';
pattern--;
break;
case '/':
#ifdef ARTSEARCH
s = scrbuf;
if (!cmd || !index("/?g",*cmd))
*s++ = '/';
strcpy(s,lastpat);
s += strlen(s);
if (!cmd || *cmd != 'g') {
if (cmd && index("/?",*cmd))
*s++ = *cmd;
else
*s++ = '/';
if (art_doread)
*s++ = 'r';
if (art_howmuch != ARTSCOPE_SUBJECT) {
*s++ = scopestr[art_howmuch];
if (art_howmuch == ARTSCOPE_ONEHDR) {
safecpy(s,htype[art_srchhdr].name,
(sizeof scrbuf) - (s-scrbuf));
if (!(s = index(s,':')))
s = scrbuf+(sizeof scrbuf)-1;
else
s++;
}
}
}
*s = '\0';
s = scrbuf;
#else
s = nullstr;
#endif
break;
case '{':
pattern = cpytill(scrbuf,pattern+1,'}');
if ((s = index(scrbuf,'-')) != NULL)
*s++ = '\0';
else
s = nullstr;
s = getval(scrbuf,s);
break;
case '<':
pattern = cpytill(scrbuf,pattern+1,'>');
if ((s = index(scrbuf,'-')) != NULL)
*s++ = '\0';
else
s = nullstr;
interp(scrbuf, 8192, getval(scrbuf,s));
s = scrbuf;
break;
case '[':
if (in_ng) {
pattern = cpytill(scrbuf,pattern+1,']');
if (*scrbuf
&& (i = get_header_num(scrbuf)) != SOME_LINE) {
safefree(line_buf);
s = line_buf = fetchlines(art,i);
}
else
s = nullstr;
}
else
s = nullstr;
break;
case '(': {
COMPEX *oldbra_compex = bra_compex;
char rch;
bool matched;
pattern = dointerp(dest,destsize,pattern+1,"!=",cmd);
rch = *pattern;
if (rch == '!')
pattern++;
if (*pattern != '=')
goto getout;
pattern = cpytill(scrbuf,pattern+1,'?');
if (!*pattern)
goto getout;
s = scrbuf;
h = spfbuf;
proc_sprintf = FALSE;
do {
switch (*s) {
case '^':
*h++ = '\\';
break;
case '\\':
*h++ = '\\';
*h++ = '\\';
break;
case '%':
proc_sprintf = TRUE;
break;
}
*h++ = *s;
} while (*s++);
if (proc_sprintf) {
dointerp(scrbuf,sizeof scrbuf,spfbuf,(char*)NULL,cmd);
proc_sprintf = FALSE;
}
if ((s = compile(&cond_compex,scrbuf,TRUE,TRUE)) != NULL) {
printf("%s: %s\n",scrbuf,s) FLUSH;
pattern += strlen(pattern);
free_compex(&cond_compex);
goto getout;
}
matched = (execute(&cond_compex,dest) != NULL);
if (getbracket(&cond_compex, 0)) /* were there brackets? */
bra_compex = &cond_compex;
if (matched==(rch == '=')) {
pattern = dointerp(dest,destsize,pattern+1,":)",cmd);
if (*pattern == ':')
pattern = skipinterp(pattern+1,")");
}
else {
pattern = skipinterp(pattern+1,":)");
if (*pattern == ':')
pattern++;
pattern = dointerp(dest,destsize,pattern,")",cmd);
}
s = dest;
bra_compex = oldbra_compex;
free_compex(&cond_compex);
break;
}
#ifdef BACKTICK
case '`': {
FILE* popen();
FILE* pipefp;
pattern = dointerp(scrbuf,(sizeof scrbuf),pattern+1,"`",cmd);
pipefp = popen(scrbuf,"r");
if (pipefp != NULL) {
int len;
len = fread(scrbuf,sizeof(char),(sizeof scrbuf)-1,
pipefp);
scrbuf[len] = '\0';
pclose(pipefp);
}
else {
printf("\nCan't run %s\n",scrbuf);
*scrbuf = '\0';
}
for (s=scrbuf; *s; s++) {
if (*s == '\n') {
if (s[1])
*s = ' ';
else
*s = '\0';
}
}
s = scrbuf;
break;
}
#endif
#ifdef PROMPTTTY
case '"':
pattern = dointerp(scrbuf,(sizeof scrbuf),pattern+1,"\"",cmd);
fputs(scrbuf,stdout) FLUSH;
resetty();
fgets(scrbuf, sizeof scrbuf, stdin);
noecho();
crmode();
i = strlen(scrbuf);
if (scrbuf[i-1] == '\n') {
scrbuf[--i] = '\0';
}
growstr(&input_str, &input_siz, i+1);
safecpy(input_str, scrbuf, i+1);
s = input_str;
break;
#endif
case '~':
s = homedir;
break;
case '.':
s = dotdir;
break;
case '+':
s = trndir;
break;
case '$':
s = scrbuf;
sprintf(s,"%ld",our_pid);
break;
case '#':
s = scrbuf;
if (upper) {
static int counter = 0;
sprintf(s,"%d",++counter);
}
else
sprintf(s,"%d",perform_cnt);
break;
case '?':
s = " ";
line_split = dest;
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
s = getbracket(bra_compex,*pattern - '0');
break;
case 'a':
if (in_ng) {
s = scrbuf;
sprintf(s,"%ld",(long)art);
}
else
s = nullstr;
break;
case 'A':
if (in_ng) {
#ifdef SUPPORT_NNTP
if (datasrc->flags & DF_REMOTE) {
if (artopen(art,(ART_POS)0)) {
nntp_finishbody(FB_SILENT);
sprintf(s = scrbuf,"%s/%s",datasrc->spool_dir,
nntp_artname(art, FALSE));
}
else
s = nullstr;
}
else
#endif
#ifdef LINKART
s = linkartname; /* for Eunice */
#else
sprintf(s = scrbuf,"%s/%s/%ld",datasrc->spool_dir,
ngdir,(long)art);
#endif
}
else
s = nullstr;
break;
case 'b':
s = savedest? savedest : nullstr;
break;
case 'B':
s = scrbuf;
sprintf(s,"%ld",(long)savefrom);
break;
case 'c':
s = ngdir? ngdir : nullstr;
break;
case 'C':
s = ngname? ngname : nullstr;
break;
case 'd':
if (ngdir) {
s = scrbuf;
sprintf(s,"%s/%s",datasrc->spool_dir,ngdir);
}
else
s = nullstr;
break;
case 'D':
if (in_ng)
s = dist_buf = fetchlines(art,DIST_LINE);
else
s = nullstr;
break;
case 'e':
s = extractprog? extractprog : "-";
break;
case 'E':
s = extractdest? extractdest : nullstr;
break;
case 'f': /* from line */
if (in_ng) {
parseheader(art);
if (htype[REPLY_LINE].minpos >= 0 && !comment_parse) {
/* was there a reply line? */
if (!(s=reply_buf))
s = reply_buf = fetchlines(art,REPLY_LINE);
}
else if (!(s = from_buf))
s = from_buf = fetchlines(art,FROM_LINE);
}
else
s = nullstr;
break;
case 'F':
if (in_ng) {
parseheader(art);
if (htype[FOLLOW_LINE].minpos >= 0)
/* is there a Followup-To line? */
s = follow_buf = fetchlines(art,FOLLOW_LINE);
else
s = ngs_buf = fetchlines(art,NGS_LINE);
}
else
s = nullstr;
break;
case 'g': /* general mode */
s = scrbuf;
*s = gmode;
s[1] = '\0';
break;
case 'h': /* header file name */
s = headname;
break;
case 'H': /* host name in postings */
s = phostname;
break;
case 'i':
if (in_ng) {
if (!(s=artid_buf))
s = artid_buf = fetchlines(art,MSGID_LINE);
if (*s && *s != '<') {
sprintf(scrbuf,"<%s>",artid_buf);
s = scrbuf;
}
}
else
s = nullstr;
break;
case 'I': /* indent string for quoting */
s = scrbuf;
sprintf(scrbuf,"'%s'",indstr);
break;
case 'j':
s = scrbuf;
sprintf(scrbuf,"%d",just_a_sec*10);
break;
case 'l': /* rn library */
#ifdef NEWS_ADMIN
s = newsadmin;
#else
s = "???";
#endif
break;
case 'L': /* login id */
s = loginName;
break;
case 'm': /* current mode */
s = scrbuf;
*s = mode;
s[1] = '\0';
break;
case 'M':
sprintf(scrbuf,"%ld",(long)dmcount);
s = scrbuf;
break;
case 'n': /* newsgroups */
if (in_ng)
s = ngs_buf = fetchlines(art,NGS_LINE);
else
s = nullstr;
break;
case 'N': /* full name */
s = getval("NAME",realName);
break;
case 'o': /* organization */
#ifdef IGNOREORG
s = getval("NEWSORG",orgname);
#else
s = getval("NEWSORG",NULL);
if (s == NULL)
s = getval("ORGANIZATION",orgname);
#endif
s = filexp(s);
#ifdef ORGFILE
if (FILE_REF(s)) {
FILE* ofp = fopen(s,"r");
if (ofp) {
if (fgets(scrbuf,sizeof scrbuf,ofp) == NULL)
*scrbuf = '\0';
fclose(ofp);
s = scrbuf+strlen(scrbuf)-1;
if (*scrbuf && *s == '\n')
*s = '\0';
s = scrbuf;
}
else
s = nullstr;
}
#endif
break;
case 'O':
s = origdir;
break;
case 'p':
s = cwd;
break;
case 'P':
s = datasrc? datasrc->spool_dir : nullstr;
break;
case 'q':
s = input_str;
break;
case 'r':
if (in_ng) {
parseheader(art);
safefree0(refs_buf);
if (htype[REFS_LINE].minpos >= 0) {
refs_buf = fetchlines(art,REFS_LINE);
normalize_refs(refs_buf);
if ((s = rindex(refs_buf,'<')) != NULL)
break;
}
}
s = nullstr;
break;
case 'R': {
int len, j;
if (!in_ng) {
s = nullstr;
break;
}
parseheader(art);
safefree0(refs_buf);
if (htype[REFS_LINE].minpos >= 0) {
refs_buf = fetchlines(art,REFS_LINE);
len = strlen(refs_buf)+1;
normalize_refs(refs_buf);
/* no more than 3 prior references PLUS the
** root article allowed, including the one
** concatenated below */
if ((s = rindex(refs_buf,'<')) != NULL && s > refs_buf) {
*s = '\0';
h = rindex(refs_buf,'<');
*s = '<';
if (h && h > refs_buf) {
s = index(refs_buf+1,'<');
if (s < h)
safecpy(s,h,len);
}
}
}
else
len = 0;
if (!artid_buf)
artid_buf = fetchlines(art,MSGID_LINE);
i = refs_buf? strlen(refs_buf) : 0;
j = strlen(artid_buf) + (i? 1 : 0)
+ (artid_buf[0] == '<'? 0 : 2) + 1;
if (len < i + j)
refs_buf = saferealloc(refs_buf, i + j);
if (i)
refs_buf[i++] = ' ';
if (artid_buf[0] == '<')
strcpy(refs_buf+i, artid_buf);
else if (artid_buf[0])
sprintf(refs_buf+i, "<%s>", artid_buf);
else
refs_buf[i] = '\0';
s = refs_buf;
break;
}
case 's':
case 'S': {
char* str;
if (!in_ng || !art || !artp) {
s = nullstr;
break;
}
if ((str = subj_buf) == NULL)
str = subj_buf = fetchsubj(art,TRUE);
subject_has_Re(str,&str);
if (*pattern == 's'
&& (h = instr(str,"- (nf", TRUE)) != NULL)
*h = '\0';
s = str;
break;
}
case 't':
case 'T':
if (!in_ng) {
s = nullstr;
break;
}
parseheader(art);
if (htype[REPLY_LINE].minpos >= 0) {
/* was there a reply line? */
if (!(s=reply_buf))
s = reply_buf = fetchlines(art,REPLY_LINE);
}
else if (!(s = from_buf))
s = from_buf = fetchlines(art,FROM_LINE);
else
s = "noname";
if (*pattern == 'T') {
if (htype[PATH_LINE].minpos >= 0) {
/* should we substitute path? */
s = path_buf = fetchlines(art,PATH_LINE);
}
i = strlen(phostname);
if (strnEQ(phostname,s,i) && s[i] == '!')
s += i + 1;
}
address_parse = TRUE; /* just the good part */
break;
case 'u':
if (in_ng) {
sprintf(scrbuf,"%ld",(long)ngptr->toread);
s = scrbuf;
}
else
s = nullstr;
break;
case 'U': {
int unseen;
if (!in_ng) {
s = nullstr;
break;
}
unseen = (art <= lastart) && !was_read(art);
if (selected_only) {
int selected;
selected = curr_artp && (curr_artp->flags & AF_SEL);
sprintf(scrbuf,"%ld",
(long)selected_count - (selected && unseen));
}
else
sprintf(scrbuf,"%ld",(long)ngptr->toread - unseen);
s = scrbuf;
break;
}
case 'v': {
int selected, unseen;
if (in_ng) {
selected = curr_artp && (curr_artp->flags & AF_SEL);
unseen = (art <= lastart) && !was_read(art);
sprintf(scrbuf,"%ld",(long)ngptr->toread-selected_count
- (!selected && unseen));
s = scrbuf;
}
else
s = nullstr;
break;
}
case 'V':
s = patchlevel + 1;
break;
case 'W':
s = datasrc? datasrc->thread_dir : nullstr;
break;
case 'x': /* news library */
s = lib;
break;
case 'X': /* rn library */
s = rnlib;
break;
#ifdef SCORE
case 'y': /* from line with *-shortening */
if (!in_ng) {
s = nullstr;
break;
}
#ifdef ASYNC_PARSE
/* parse_maybe(art); */
#endif
/* XXX Rewrite this! */
{ /* sick, but I don't want to hunt down a buf... */
static char tmpbuf[1024];
char* s2;
char* s3;
int i = 0;
s2 = fetchlines(art,FROM_LINE);
strcpy(tmpbuf,s2);
free(s2);
for (s2=tmpbuf;
(*s2 && (*s2 != '@') && (*s2 !=' '));s2++)
; /* EMPTY */
if (*s2 == '@') { /* we have normal form... */
for (s3=s2+1;(*s3 && (*s3 != ' '));s3++)
if (*s3 == '.')
i++;
}
if (i>1) { /* more than one dot */
s3 = s2; /* will be incremented before use */
while (i>=2) {
s3++;
if (*s3 == '.')
i--;
}
s2++;
*s2 = '*';
s2++;
*s2 = '\0';
from_buf = (char*)safemalloc(
(strlen(tmpbuf)+strlen(s3)+1)*sizeof(char));
strcpy(from_buf,tmpbuf);
strcat(from_buf,s3);
} else {
from_buf = savestr(tmpbuf);
}
s = from_buf;
}
break;
#endif /* SCORE */
case 'Y':
s = tmpdir;
break;
case 'z':
if (!in_ng) {
s = nullstr;
break;
}
#ifdef LINKART
s = linkartname; /* so Eunice people get right file */
#else
s = scrbuf;
sprintf(s,"%ld",(long)art);
#endif
if (stat(s,&filestat) < 0)
filestat.st_size = 0L;
sprintf(scrbuf,"%5ld",(long)filestat.st_size);
s = scrbuf;
break;
case 'Z':
sprintf(scrbuf,"%ld",(long)selected_count);
s = scrbuf;
break;
case '\0':
s = nullstr;
break;
default:
if (--destsize <= 0)
abort_interp();
*dest++ = *pattern | metabit;
s = nullstr;
break;
}
}
if (proc_sprintf) {
sprintf(scrbuf,spfbuf,s);
s = scrbuf;
}
if (*pattern)
pattern++;
if (upper || lastcomp) {
char* t;
if (s != scrbuf) {
safecpy(scrbuf,s,sizeof scrbuf);
s = scrbuf;
}
if (upper || !(t = rindex(s,'/')))
t = s;
while (*t && !isalpha(*t))
t++;
if (islower(*t))
*t = toupper(*t);
}
/* Do we have room left? */
i = strlen(s);
if (destsize <= i)
abort_interp();
destsize -= i; /* adjust the size now. */
#ifdef DEBUG
if (debug & DEB_INTRP)
printf("%% = %s\n",s);
#endif
/* A maze of twisty little conditions, all alike... */
if (address_parse || comment_parse) {
if (s != scrbuf) {
safecpy(scrbuf,s,sizeof scrbuf);
s = scrbuf;
}
decode_header(s, s, strlen(s));
if (address_parse) {
if ((h=index(s,'<')) != NULL) { /* grab the good part */
s = h+1;
if ((h=index(s,'>')) != NULL)
*h = '\0';
} else if ((h=index(s,'(')) != NULL) {
while (h-- != s && *h == ' ')
;
h[1] = '\0'; /* or strip the comment */
}
} else {
if (!(s = extract_name(s)))
s = nullstr;
}
}
if (metabit) {
/* set meta bit while copying. */
i = metabit; /* maybe get into register */
if (s == dest) {
while (*dest)
*dest++ |= i;
} else {
while (*s)
*dest++ = *s++ | i;
}
} else if (re_quote || tick_quote) {
/* put a backslash before regexp specials while copying. */
if (s == dest) {
/* copy out so we can copy in. */
safecpy(scrbuf, s, sizeof scrbuf);
s = scrbuf;
if (i > sizeof scrbuf) /* we truncated, ack! */
abort_interp();
}
while (*s) {
if ((re_quote && index(regexp_specials, *s))
|| (tick_quote == 2 && *s == '"')) {
if (--destsize <= 0)
abort_interp();
*dest++ = '\\';
}
else if (re_quote && *s == ' ' && s[1] == ' ') {
*dest++ = ' ';
*dest++ = '*';
while (*++s == ' ') ;
continue;
}
else if (tick_quote && *s == '\'') {
if ((destsize -= 3) <= 0)
abort_interp();
*dest++ = '\'';