mirror of
https://github.com/freebsd/freebsd-src
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41 lines
991 B
C
41 lines
991 B
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD$
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "libdisk.h"
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void *
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read_block(int fd, daddr_t block)
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{
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void *foo;
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foo = malloc(512);
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if (!foo)
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barfout(1, "malloc");
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if (-1 == lseek(fd, (off_t)block * 512, SEEK_SET))
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barfout(1, "lseek");
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if (512 != read(fd, foo, 512))
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barfout(1, "read");
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return foo;
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}
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void
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write_block(int fd, daddr_t block, void *foo)
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{
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if (-1 == lseek(fd, (off_t)block * 512, SEEK_SET))
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barfout(1, "lseek");
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if (512 != write(fd,foo, 512))
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barfout(1, "write");
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}
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