OrdinaryMagician/stuff
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I guess I can just put this up. Most of these have been sitting here forever.

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Marisa the Magician 2017-09-04 11:24:40 +02:00
commit d2777092d1
26 changed files with 5347 additions and 0 deletions
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71
zimagekver.c Normal file
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@ -0,0 +1,71 @@
#include <stdio.h>
#include <string.h>
#include <errno.h>
int main( int argc, char **argv )
{
if ( argc < 2 )
{
fprintf(stderr,"No file provided!\n");
return 1;
}
FILE *k;
if ( !(k = fopen(argv[1],"r")) )
{
fprintf(stderr,"Could not open file: %s\n",strerror(errno));
return 2;
}
/* seek to fields */
if ( fseek(k,0x24,SEEK_SET) == -1 )
{
fprintf(stderr,"Could not seek in file for header: %s\n",
strerror(errno));
fclose(k);
return 4;
}
/* read important info */
unsigned sig = 0, start = 0, end = 0;
fread(&sig,4,1,k);
fread(&start,4,1,k);
fread(&end,4,1,k);
if ( sig != 0x016f2818 )
{
fprintf(stderr,"Bad magic %08x, not a valid zImage\n",sig);
fclose(k);
return 4;
}
/*
Search for Linux version at end, we need to find "DTOK" followed
by "Linux version". This normally starts 64 bytes after the zImage.
*/
if ( fseek(k,end+0x40,SEEK_SET) == -1 )
{
fprintf(stderr,
"Could not seek in file for version string: %s\n",
strerror(errno));
fclose(k);
return 8;
}
char dtok[4] = "";
fread(dtok,1,4,k);
if ( strncmp(dtok,"DTOK",4) )
{
fprintf(stderr,"Expected \"DTOK\", got \"%.4s\"\n",dtok);
fclose(k);
return 16;
}
char kver[128] = "";
fgets(kver,128,k);
fclose(k);
if ( strncmp(kver,"Linux version ",14) )
{
fprintf(stderr,"Expected \"Linux version \", got \"%.14s\"\n",
kver);
return 32;
}
/* get the actual version string and print it */
char kernver[128] = "";
sscanf(kver,"Linux version %s",kernver);
printf("%s\n",kernver);
return 0;
}