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SELF.C
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C/C++ Source or Header
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1991-03-02
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2KB
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110 lines
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <farstr.h>
#include <dos.h>
#include "sfx.h"
#include "lh.h"
#include "intrface.h"
#include "errmes.h"
#include "disp.h"
struct exe_header {
ushort id;
ushort last;
ushort size;
ushort relsize;
ushort hdrsize;
ushort minalloc;
ushort maxalloc;
ushort initss;
ushort initsp;
ushort sum;
ushort initip;
ushort initcs;
ushort reloffset;
ushort overlay;
ushort dummy0;
ushort dummy1;
} exehdr =
{0x5a4d, (A_endofcode + sizeof(exehdr)) & 0x01ff,
(A_endofcode + sizeof(exehdr) + 0x01ff) / 0x0200,
0x0000, 0x0002, 0x1000, 0xffff, 0xfff0,
0x0100, 0x0000, 0x0100, 0xfff0, 0x001c, 0x0000, 0x0000, 0x0000};
char nojump[] = "\xeb\x01";
void initsfx(void)
{
char *p, *q;
p = getfilename(filename1);
q = strchr(p, '.');
if (q) *q = '\0';
strcpy(filename1, p);
strcat(filename1, ".EXE");
extract_internal(NULL, sfx);
if (flg_x == 0) {
exehdr.last = (A_endofshort + sizeof(exehdr)) & 0x01ff;
exehdr.size = (A_endofshort + sizeof(exehdr) + 0x01ff) / 0x0200;
text[A_subver] = 'S';
strcpy(&text[A_getopt - 3], nojump);
*(ushort *)&text[A_seeksize - 2] = A_endofshort + sizeof(exehdr);
strcpy(&text[A_extended - 3], nojump); /* memcpy(,,3) */
strcpy(&text[A_setattr - 3], nojump);
strcpy(&text[A_autoexec - 3], nojump);
}
strcpy(&text[A_myself], filename1);
fwrite(&exehdr, sizeof(exehdr), 1, file2);
fwrite(text, flg_x ? A_endofcode : A_endofshort, 1, file2);
}
int copysfx(void)
{
char *p;
char c;
p = &hpb.method[3];
if (flg_x == 0) hpb.pathname = hpb.filename;
dispalone("Extract");
c = *p; *p = ' ';
if (memcmp(hpb.method, "-lh -", 5) || strchr("045", c) == NULL) {
eprintf(" : %s\n", METHODERR);
return 0;
}
*p = c;
hpb.level = 0;
update_arcstamp();
makehdr();
writehdr();
copyfile(file1, file2, hpb.packed, 0);
eprintf("\n");
return 1;
}
void makesfx(char far *bdir)
{
uint attr;
int yn;
fclose(file1);
far_strcpy(arcname, bdir);
strcat(arcname, getfilename(filename1));
strcpy(filename1, arcname);
if (_dos_getfileattr(arcname, &attr) == 0) {
yn = 'Y';
if (flg_m == 0) {
eprintf("\n%s : %s\n%s", arcname, SAMEFILE, OVERWT);
yn = getyn();
}
if (yn == 'N') {
fclose(file2);
remove(filename2);
file2 = NULL;
} else {
if (remove(arcname)) error(RDONLY, arcname);
}
}
}