Attachment 302444 Details for Bug 438423 – reproducer 2

[patch] reproducer 2

write-simple.c (text/plain), 1.63 KB, created by Jeff Layton on 2008-04-15 12:38:55 UTC

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Creator: Jeff Layton

Created: 2008-04-15 12:38:55 UTC

Size: 1.63 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <fcntl.h>
>#include <errno.h>
>#include <unistd.h>
>#include <sys/vfs.h>
>
>/* use blocksize equal to wsize */
>#define BUFSZ 32768
>
>
>/*
> * write specified number of kbytes to given filename, and then do a
> * fsync to make sure the writes are flushed. Then, try to write 1k
> * more and check the return value to make sure it errors out. Should
> * be run with a number of kbytes which is more than the amount of
> * space on the destination filesystem
> */
>int
>main(int argc, char **argv)
>{
>	char *buf;
>	int fd, err;
>	ssize_t written, total_written, filesize;
>
>	if (argc < 3) {
>		printf("Usage: %s filename bytes\n", argv[0]);
>		return 1;
>	}
>
>	filesize = atol(argv[2]);
>
>	buf = calloc(1, BUFSZ);
>	if (buf == NULL) {
>		printf("calloc failed: %d\n", -ENOMEM);
>		return -ENOMEM;
>	}
>
>	fd = open(argv[1], O_WRONLY|O_CREAT|O_TRUNC, 0600);
>	if (fd < 0) {
>		printf("open failed: %d\n", -errno);
>		return -errno;
>	}
>
>	printf("Attempting to write %ld byte file to %s\n", filesize, argv[1]);
>
>	total_written = 0;
>	while (total_written < filesize) {
>		written = write(fd, buf, BUFSZ);
>		if (written < 0) {
>			if (errno == ENOSPC) {
>				printf("write: ENOSPC after writing %ld bytes\n",
>					total_written);
>				return 0;
>			} else {
>				printf("write: error %d while writing\n", errno);
>				return 1;
>			}
>		}
>		total_written += written;
>	}
>
>	printf("Entire file written\n");
>
>	err = fsync(fd);
>	if (err < 0) {
>		printf("fsync: error %d\n", errno);
>		return 1;
>	}
>
>	err = close(fd);
>	if (err < 0) {
>		printf("close: error %d\n", errno);
>		return 1;
>	}
>
>	printf("no errors at all!\n");
>	return 1;
>}

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Attachments on bug 438423: 298747 | 299375 | 299887 | 302444