slackware-current/source/a/rpm2tgz/rpmoffset.c
Patrick J Volkerding b76270bf9e Slackware 13.1
Wed May 19 08:58:23 UTC 2010
Slackware 13.1 x86_64 stable is released!
Lots of thanks are due -- see the RELEASE_NOTES and the rest of the
ChangeLog for credits.  The ISOs are on their way to replication,
a 6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD.
We are taking pre-orders now at store.slackware.com, and offering
a discount if you sign up for a subscription.  Consider picking up
a copy to help support the project.  Thanks again to the Slackware
community for testing, contributing, and generally holding us to a
high level of quality.  :-)
Enjoy!
2018-05-31 22:43:05 +02:00

25 lines
854 B
C

/* Find how deeply inside an .RPM the real data is */
/* kept, and report the offset in bytes */
/* Wouldn't it be a lot more sane if we could just untar these things? */
#include <stdlib.h>
#include <stdio.h>
/* These offsets keep getting bigger, so we're going to just bite a 2MB */
/* chunk of RAM right away so that we have enough. Yeah, horrible */
/* quick and dirty implementation, but hey -- it gets the job done. */
#define RPMBUFSIZ 2097152
main()
{
char *buff = malloc(RPMBUFSIZ),*eb,*p;
for (p = buff, eb = buff + read(0,buff,RPMBUFSIZ); p < eb; p++)
if ((*p == '\037' && p[1] == '\213' && p[2] == '\010') ||
(*p == 'B' && p[1] == 'Z' && p[2] == 'h' && '1' <= p[3] && p[3] <= '9' ))
printf("%d\n",p - buff),
exit(0);
exit(1);
}