⬢ DragonFlyBSD Kernel Audit
DF-0903 / offsets.c
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/* Print byte offsets of every struct fs field we care about for DF-0903. */
#include <stdio.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/param.h>
#include <vfs/ufs/ufs_types.h>
#include <vfs/ufs/fs.h>

int main(void){
    struct fs f;
    printf("sizeof(struct fs)        = %zu\n", sizeof(struct fs));
    printf("offsetof fs_bmask        = %zu\n", offsetof(struct fs, fs_bmask));
    printf("offsetof fs_fmask        = %zu\n", offsetof(struct fs, fs_fmask));
    printf("offsetof fs_bshift       = %zu\n", offsetof(struct fs, fs_bshift));
    printf("offsetof fs_fshift       = %zu\n", offsetof(struct fs, fs_fshift));
    printf("offsetof fs_bsize        = %zu\n", offsetof(struct fs, fs_bsize));
    printf("offsetof fs_fsize        = %zu\n", offsetof(struct fs, fs_fsize));
    printf("offsetof fs_frag         = %zu\n", offsetof(struct fs, fs_frag));
    printf("offsetof fs_inodefmt     = %zu\n", offsetof(struct fs, fs_inodefmt));
    printf("offsetof fs_qbmask       = %zu\n", offsetof(struct fs, fs_qbmask));
    printf("offsetof fs_qfmask       = %zu\n", offsetof(struct fs, fs_qfmask));
    printf("offsetof fs_magic        = %zu\n", offsetof(struct fs, fs_magic));
    printf("offsetof fs_postblformat = %zu\n", offsetof(struct fs, fs_postblformat));
    printf("offsetof fs_sbsize       = %zu\n", offsetof(struct fs, fs_sbsize));
    return 0;
}