Category : C Source Code
Archive : LHA211S.ZIP
Filename : EXTRACT.C
Output of file : EXTRACT.C contained in archive : LHA211S.ZIP
extract.c -- extract file from archive
***********************************************************/
#include
#include
#include
#include
#include
#include
#include
#include "lh.h"
#include "intrface.h"
#include "errmes.h"
#include "disp.h"
static char methods[10][5] = {
"-lh0-", "-lh1-", "-lh2-", "-lh3-", "-lh4-",
"-lh5-", "-lzs-", "-lz5-", "-lz4-", "\0\0\0\0\0"
};
/*******************************
test the file name which
should be melted
*******************************/
static char tstdir(char *name)
{
char *p, *q, yn;
int absent;
struct find_t srchbuf;
p = name;
if (*p && p[1] == ':') /* skip a drive name */
p += 2;
if (*p == DELIM) /* skip a root mark('\') */
p++;
yn = flg_m ? 'Y' : 'N';
q = p;
while ((p = strchr(p, DELIM)) != NULL) { /* skip to next '\' */
if (*q != '.') {
*p = '\0';
absent = _dos_findfirst(name, 0x17, &srchbuf);
if (absent) {
if (yn == 'N') {
*p = DELIM;
eprintf("'%s' : %s", name, MKDIR);
*p = '\0';
yn = getyn();
}
if (yn == 'N') {
return 'S';
} else {
if (makedir(name)) { /* make directory */
error(MKDIRERR, name);
}
}
} else {
if ((srchbuf.attrib & 0x10) == 0) {
error(MKDIRERR, name); /* if the name isn't directory */
}
}
*p = DELIM;
}
q = ++p;
}
if (! _dos_findfirst(name, 0x17, &srchbuf)) {
/* already exists */
if (flg_c == 0 &&
dos2unix((struct ftime *)&srchbuf.wr_time) >= hpb.utc) yn = 'S';
switch (flg_m) {
case 0:
if (yn != 'S') {
eprintf("'%s' %s", name, OVERWT);
yn = (getyn() == 'Y') ? 'O' : 'S';
break;
}
case 1:
if (yn == 'S') {
skipdisp(NEWFILE);
break;
}
yn = 'O';
break;
case 2:
yn = 'R';
break;
}
if (yn != 'O') {
return yn;
}
if (srchbuf.attrib & 0x01 &&
srchbuf.attrib != hpb.attr && !flg_a) {
/* if the file is read-only, */
/* attributes must match */
skipdisp(RDONLY);
return 'S';
}
if (srchbuf.attrib & 0x10) {
skipdisp(SAMEDIR);
return 'S';
}
if (srchbuf.attrib & 0x07)
_dos_setfileattr(name, 0x20); /* reset attributes */
}
return 'O';
}
static int rename_ext(char *name)
{
int i;
char *p, *q;
struct find_t srchbuf;
p = strrchr(name, '.');
q = strrchr(name, DELIM);
if (p <= q) p = name + strlen(name);
for (i = 0; i <= 999; i++) {
sprintf(p, ".%03d", i);
if (_dos_findfirst(name, 0x17, &srchbuf)) return 1;
}
return 0;
}
void extract(char far *bdir)
{
char *path;
int method;
memcpy(methods[9], hpb.method, 5);
for (method = 0; memcmp(hpb.method, methods[method], 5); method++);
if (method == 9) {
skipdisp(METHODERR);
return;
}
switch (cmd) {
case 'E':
if ((hpb.attr & 0x06) && flg_a == 0) {
skipdisp(SPECIALATTR);
return;
}
form_path(hpb.pathname);
hpb.filename = getfilename(hpb.pathname);
path = (flg_x) ? hpb.pathname : hpb.filename;
far_strcpy(filename3, bdir);
if (path[1] == ':') path += 2;
if (*(unsigned char *)path == DELIM) {
if (filename3[1] == ':') {
filename3[2] = '\0';
} else {
*filename3 = '\0';
}
}
strcat(filename3, path);
switch (tstdir(filename3)) {
case 'R':
if (rename_ext(filename3)) break;
skipdisp(NOMOREEXT);
case 'S':
return;
}
if (diskspace(filename3) < hpb.original) {
skipdisp(DISKFULL);
return;
}
file3 = mywopen(filename3, MKFILEERR);
regdisp("Melting ", filename3);
break;
case 'P':
file3 = fdopen(dup(1), "wb");
regdisp("Melting", NULL);
fprintf(file3, "\r\n<< %s >>\r\n\r\n", hpb.filename);
fflush(file3);
break;
case 'T':
if (hpb.level < 0) {
skipdisp(NOCRC);
return;
}
regdisp("Testing", NULL);
file3 = NULL;
break;
}
interface.method = method;
interface.dicbit = 13; /* method + 8; */
interface.infile = file1;
interface.outfile = file3;
interface.original = hpb.original;
interface.packed = hpb.packed;
switch (method) {
case 8:
method = 0;
break;
case 6:
interface.dicbit = 11;
break;
case 1:
case 4:
case 7:
interface.dicbit = 12;
break;
}
disp(cmd == 'P' && !outredir, cmd != 'P' && outredir);
initdisp();
if (method) {
decode(&interface);
} else {
copyfile(file1, file3, hpb.original, 1);
}
if (file3) {
#if 0
if (fflush(file3)) error(WTERR, filename3);
#else
fflush(file3);
#endif
setfiletime(file3, hpb.utc);
fclose(file3);
file3 = NULL;
}
if (hpb.level >= 0 && crc != hpb.filecrc) {
errorlevel = 1;
eprintf("\rCRC err\n");
if (cmd == 'E') {
if (flg_m == 0) {
eprintf(MAYDELETE);
if (getyn() == 'Y')
remove(filename3);
} else {
remove(filename3);
}
}
if (flg_m == 0) {
eprintf(MAYCONT);
if (getyn() != 'Y')
error(CTRLBRK, NULL);
}
} else {
if (cmd == 'T') {
enddisp("Test OK");
} else {
if (cmd != 'P' || outredir) enddisp("Melted ");
}
if (cmd == 'E' && flg_a) {
_dos_setfileattr(filename3, hpb.attr);
}
}
}
void extract_internal(FILE *f, char *p)
{
interface.method = 5;
interface.dicbit = 13;
interface.infile = NULL;
interface.outfile = f ? fdopen(dup(fileno(f)), "wb") : f;
interface.original = *(ushort *)(p + 2);
interface.packed = *(ushort *)p;
interface.blkcnt = -1;
interface.internal = (char *)(p + 4);
disp(1, 0);
initdisp();
decode(&interface);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/