Attachment 40092 Details for Bug 94160

xx.c

xx.c (text/plain), 1.27 KB, created by Marcus Meissner on 2005-06-28 08:30:05 UTC

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Creator: Marcus Meissner

Created: 2005-06-28 08:30:05 UTC

Size: 1.27 KB

patch

obsolete

>#define _LARGEFILE_SOURCE
>#define _FILE_OFFSET_BITS 64
>#include <stdio.h>
>#include <fcntl.h>
>#include <stdlib.h>
>#include <sys/types.h>
>#include <unistd.h>
>
>             ssize_t pread(int fd, void *buf, size_t count, off_t offset);
>
>int main(int argc, char **argv) {
>	int fd;
>	char buf[8192];
>	off_t	offset;
>
>	fd = open("/sys/block/md0/stat",O_RDONLY);
>	if (fd == -1) {perror("open");exit(1);}
>
>	lseek(fd, 0, SEEK_CUR);
>	if (-1==read(fd, buf, 4096)) { perror("read 2"); }
>	lseek(fd, 0, SEEK_CUR);
>	if (-1==read(fd, buf, 1024)) { perror("read 2"); }
>	if (-1==read(fd, buf, 1024)) { perror("read 2"); }
>
>	offset = lseek(fd, 0, SEEK_SET);
>	if (-1==read(fd, buf, 3)) { perror("read 2"); }
>	offset = lseek(fd, 0, SEEK_SET);
>	if (-1==read(fd, buf, 1024)) { perror("read 2"); }
>	offset = lseek(fd, 1, SEEK_SET);
>	if (-1==read(fd, buf, 4096)) { perror("read 2"); }
>
>	lseek(fd, 0, SEEK_CUR);
>	lseek(fd, 0, SEEK_END);
>	lseek(fd, offset, SEEK_SET);
>	lseek(fd, 3072, SEEK_SET);
>	if (-1==read(fd, buf, 4096)) { perror("read 8192"); }
>	lseek(fd, 1536, SEEK_SET);
>	if (-1==read(fd, buf, 4096)) { perror("read 4096"); }
>	lseek(fd, 1536, SEEK_SET);
>	if (-1==read(fd, buf, 4096)) { perror("read 4096"); }
>	if (-1==read(fd, buf, 4096)) { perror("read 4096"); }
>	if (-1==read(fd, buf, 4096)) { perror("read 4096"); }
>
>}

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