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#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
/*
* This function opens a file and to trigger migration failure, unlinks the
* file and performs graph switch (cmd passed in argv). If everything goes fine,
* fsync should fail without crashing the mount process.
*/
int
main (int argc, char **argv)
{
int ret = 0;
int fd = 0;
char *cmd = argv[1];
printf ("cmd is: %s\n", cmd);
fd = open("a.txt", O_CREAT|O_RDWR, 0644);
if (fd < 0)
printf ("open failed: %s\n", strerror(errno));
ret = unlink("a.txt");
if (ret < 0)
printf ("unlink failed: %s\n", strerror(errno));
if (write (fd, "abc", 3) < 0)
printf ("Not able to print %s\n", strerror (errno));
system(cmd);
sleep(1); /* No way to confirm graph switch so sleep 1 */
ret = fsync(fd);
if (ret < 0)
printf ("Not able to fsync %s\n", strerror (errno));
return 0;
}
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