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/* util2.c
*/
/* This software is copyrighted as detailed in the LICENSE file. */
#include "EXTERN.h"
#include "common.h"
#include "list.h"
#include "hash.h"
#include "ngdata.h"
#include "nntpclient.h"
#include "datasrc.h"
#include "nntp.h"
#include "nntpauth.h"
#include "util.h"
#include "util3.h"
#include "INTERN.h"
#include "util2.h"
#ifdef TILDENAME
static char* tildename = NULL;
static char* tildedir = NULL;
#endif
/* copy a string to a safe spot */
char*
savestr(str)
char* str;
{
register char* newaddr = safemalloc((MEM_SIZE)(strlen(str)+1));
strcpy(newaddr,str);
return newaddr;
}
/* safe version of string copy */
char*
safecpy(to,from,len)
char* to;
register char* from;
register int len;
{
register char* dest = to;
if (from) {
while (--len && *from)
*dest++ = *from++;
}
*dest = '\0';
return to;
}
/* copy a string up to some (non-backslashed) delimiter, if any */
char*
cpytill(to,from,delim)
register char* to;
register char* from;
register int delim;
{
while (*from) {
if (*from == '\\' && from[1] == delim)
from++;
else if (*from == delim)
break;
*to++ = *from++;
}
*to = '\0';
return from;
}
/* expand filename via %, ~, and $ interpretation */
/* returns pointer to static area */
/* Note that there is a 1-deep cache of ~name interpretation */
char*
filexp(s)
register char* s;
{
static char filename[CBUFLEN];
char scrbuf[CBUFLEN];
register char* d;
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("< %s\n",s) FLUSH;
#endif
/* interpret any % escapes */
dointerp(filename,sizeof filename,s,(char*)NULL,(char*)NULL);
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("%% %s\n",filename) FLUSH;
#endif
s = filename;
if (*s == '~') { /* does destination start with ~? */
if (!*(++s) || *s == '/') {
sprintf(scrbuf,"%s%s",homedir,s);
/* swap $HOME for it */
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("~ %s\n",scrbuf) FLUSH;
#endif
strcpy(filename,scrbuf);
}
else if (*s == '~' && (!s[1] || s[1] == '/')) {
d = getenv("TRNPREFIX");
if (!d)
d = INSTALLPREFIX;
sprintf(scrbuf,"%s%s",d,s+1);
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("~~ %s\n",scrbuf) FLUSH;
#endif
}
else {
#ifdef TILDENAME
for (d = scrbuf; isalnum(*s); s++, d++) *d = *s;
*d = '\0';
if (tildedir && strEQ(tildename,scrbuf)) {
strcpy(scrbuf,tildedir);
strcat(scrbuf, s);
strcpy(filename, scrbuf);
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("r %s %s\n",tildename,tildedir) FLUSH;
#endif
}
else {
if (tildename)
free(tildename);
if (tildedir)
free(tildedir);
tildedir = NULL;
tildename = savestr(scrbuf);
#ifdef HAS_GETPWENT /* getpwnam() is not the paragon of efficiency */
{
struct passwd* pwd = getpwnam(tildename);
if (pwd == NULL) {
printf("%s is an unknown user. Using default.\n",tildename) FLUSH;
return NULL;
}
sprintf(scrbuf,"%s%s",pwd->pw_dir,s);
tildedir = savestr(pwd->pw_dir);
strcpy(filename,scrbuf);
endpwent();
}
#else /* this will run faster, and is less D space */
{ /* just be sure LOGDIRFIELD is correct */
FILE* pfp = fopen(filexp(PASSFILE),"r");
char tmpbuf[512];
int i;
if (pfp) {
while (fgets(tmpbuf,512,pfp) != NULL) {
d = cpytill(scrbuf,tmpbuf,':');
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("p %s\n",tmpbuf) FLUSH;
#endif
if (strEQ(scrbuf,tildename)) {
for (i=LOGDIRFIELD-2; i; i--) {
if (d)
d = index(d+1,':');
}
if (d) {
cpytill(scrbuf,d+1,':');
tildedir = savestr(scrbuf);
strcat(scrbuf,s);
strcpy(filename,scrbuf);
}
break;
}
}
fclose(pfp);
}
if (!tildedir) {
printf("%s is an unknown user. Using default.\n",tildename) FLUSH;
return NULL;
}
}
#endif
}
#else /* !TILDENAME */
#ifdef VERBOSE
IF(verbose)
fputs("~loginname not implemented.\n",stdout) FLUSH;
ELSE
#endif
#ifdef TERSE
fputs("~login not impl.\n",stdout) FLUSH;
#endif
#endif
}
}
else if (*s == '$') { /* starts with some env variable? */
d = scrbuf;
*d++ = '%';
if (s[1] == '{')
strcpy(d,s+2);
else {
*d++ = '{';
for (s++; isalnum(*s); s++) *d++ = *s;
/* skip over token */
*d++ = '}';
strcpy(d,s);
}
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("$ %s\n",scrbuf) FLUSH;
#endif
/* this might do some extra '%'s, but that's how the Mercedes Benz */
dointerp(filename,sizeof filename,scrbuf,(char*)NULL,(char*)NULL);
}
#ifdef DEBUG
if (debug & DEB_FILEXP)
printf("> %s\n",filename) FLUSH;
#endif
return filename;
}
/* return ptr to little string in big string, NULL if not found */
char*
instr(big, little, case_matters)
char* big;
char* little;
bool_int case_matters;
{
register char* t;
register char* s;
register char* x;
for (t = big; *t; t++) {
for (x=t,s=little; *s; x++,s++) {
if (!*x)
return NULL;
if (case_matters == TRUE) {
if (*s != *x)
break;
} else {
register char c,d;
if (isupper(*s))
c = tolower(*s);
else
c = *s;
if (isupper(*x))
d = tolower(*x);
else
d = *x;
if ( c != d )
break;
}
}
if (!*s)
return t;
}
return NULL;
}
#ifndef HAS_STRCASECMP
static Uchar casemap[256] = {
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,
0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,
0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,
0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
0x78,0x79,0x7A,0x7B,0x5C,0x5D,0x5E,0x5F,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,
0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,
0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,
0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,
0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,
0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,
0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
};
#endif
#ifndef HAS_STRCASECMP
int
trn_casecmp(s1, s2)
register char* s1;
register char* s2;
{
do {
if (casemap[(Uchar)*s1++] != casemap[(Uchar)*s2])
return casemap[(Uchar)s1[-1]] - casemap[(Uchar)*s2];
} while (*s2++ != '\0');
return 0;
}
#endif
#ifndef HAS_STRCASECMP
int
trn_ncasecmp(s1, s2, len)
register char* s1;
register char* s2;
register int len;
{
while (len--) {
if (casemap[(Uchar)*s1++] != casemap[(Uchar)*s2])
return casemap[(Uchar)s1[-1]] - casemap[(Uchar)*s2];
if (*s2++ == '\0')
break;
}
return 0;
}
#endif
#ifdef SUPPORT_NNTP
char*
read_auth_file(file, pass_ptr)
char* file;
char** pass_ptr;
{
FILE* fp;
char* strptr[2];
char buf[1024];
strptr[0] = strptr[1] = NULL;
if ((fp = fopen(file,"r")) != NULL) {
int i;
for (i = 0; i < 2; i++) {
if (fgets(buf, sizeof buf, fp) != NULL) {
char* cp = buf + strlen(buf) - 1;
if (*cp == '\n')
*cp = '\0';
strptr[i] = savestr(buf);
}
}
fclose(fp);
}
*pass_ptr = strptr[1];
return strptr[0];
}
#endif
#ifdef MSDOS
int
ChDir(path)
char* path;
{
if (isalpha(*path) && path[1] == ':') {
setdisk(path[0]&0x1f);
path += 2;
}
#undef chdir
return chdir(path);
}
#endif
#ifdef MSDOS
int
getuid()
{
return 2;
}
#endif
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