25 lines
906 B
C
25 lines
906 B
C
/* Find how deeply inside an .RPM the real data is */
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/* kept, and report the offset in bytes */
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/* Wouldn't it be a lot more sane if we could just untar these things? */
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#include <stdlib.h>
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/* These offsets keep getting bigger, so we're going to just bite a 2MB */
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/* chunk of RAM right away so that we have enough. Yeah, horrible */
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/* quick and dirty implementation, but hey -- it gets the job done. */
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#define RPMBUFSIZ 2097152
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const char magic[][3]={"\x1F\x8B\x08"/*gzip*/,"BZh"/*bzip2*/};
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main()
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{
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char *buff = malloc(RPMBUFSIZ),*eb,*p;
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for (p = buff, eb = buff + read(0,buff,RPMBUFSIZ); p < eb; p++)
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if ((*p == magic[0][0] && p[1] == magic[0][1] && p[2] == magic[0][2]) ||
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(*p == magic[1][0] && p[1] == magic[1][1] && p[2] == magic[1][2]))
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printf("%d\n",p - buff),
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exit(0);
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exit(1);
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}
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