105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
#ifndef lint
|
|
static char sccsid[] = "@(#)strip.c 1.1 94/10/31 SMI"; /* from UCB 4.5 83/07/06 */
|
|
#endif
|
|
/*
|
|
* strip
|
|
*/
|
|
#include <a.out.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <sys/file.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
struct exec head;
|
|
int pagesize;
|
|
|
|
main(argc, argv)
|
|
char *argv[];
|
|
{
|
|
register i;
|
|
int rc = 0;
|
|
|
|
signal(SIGHUP, SIG_IGN);
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
for (i = 1; i < argc; i++) {
|
|
if(strcmp(argv[i], "-x")==0 || strcmp(argv[i],"-r")==0) {
|
|
printf("strip: %s is not currently supported\n", argv[i]);
|
|
rc = 1;
|
|
break;
|
|
}
|
|
rc |= strip(argv[i]);
|
|
}
|
|
exit(rc);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
int
|
|
strip(name)
|
|
char *name;
|
|
{
|
|
register f;
|
|
long size;
|
|
int status = 0;
|
|
struct stat stb;
|
|
int extra = 0;
|
|
struct extra_sections xtra;
|
|
unsigned str_size, xtra_size;
|
|
char *p;
|
|
int magic;
|
|
|
|
f = open(name, O_RDWR);
|
|
if (f < 0) {
|
|
fprintf(stderr, "strip: "); perror(name);
|
|
status = 1;
|
|
goto out;
|
|
}
|
|
if (read(f, (char *)&head, sizeof (head)) < 0 || N_BADMAG(head)) {
|
|
printf("strip: %s not in a.out format\n", name);
|
|
status = 1;
|
|
goto out;
|
|
}
|
|
if ((head.a_syms == 0) && (head.a_trsize == 0) && (head.a_drsize ==0)) {
|
|
printf("strip: %s already stripped\n", name);
|
|
goto out;
|
|
}
|
|
/* check if the extra section exists */
|
|
fstat(f, &stb);
|
|
lseek(f, N_STROFF(head), L_SET);
|
|
read(f, &str_size, sizeof(str_size));
|
|
/* check if EXTRA_MAGIC is right after the string table */
|
|
if( stb.st_size > (N_STROFF(head)+str_size)){
|
|
lseek(f, N_STROFF(head)+str_size, L_SET);
|
|
read(f, &magic, sizeof(magic));
|
|
extra = (magic == EXTRA_MAGIC);
|
|
}
|
|
if (extra){
|
|
lseek(f, N_STROFF(head)+str_size, L_SET);
|
|
read(f, &xtra, sizeof(xtra));
|
|
read(f, &xtra_size, sizeof(xtra_size));
|
|
p = (char*)malloc(xtra_size);
|
|
read(f, p, xtra_size);
|
|
}
|
|
head.a_syms = head.a_trsize = head.a_drsize = 0;
|
|
size = N_SYMOFF(head);
|
|
if (ftruncate(f, size) < 0) {
|
|
fprintf(stderr, "strip: "); perror(name);
|
|
status = 1;
|
|
goto out;
|
|
}
|
|
(void) lseek(f, (long)0, L_SET);
|
|
(void) write(f, (char *)&head, sizeof (head));
|
|
|
|
/* put out the extra section after the truncation */
|
|
if (extra){
|
|
lseek(f, size, L_SET);
|
|
write(f, &xtra, sizeof(xtra));
|
|
write(f, &xtra_size, sizeof(xtra_size));
|
|
write(f, p, xtra_size);
|
|
}
|
|
out:
|
|
close(f);
|
|
return status;
|
|
}
|