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#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>
int main(int argc, char **argv)
{
if(argc != 2)
{
fprintf(stderr, "ERROR: Must specify mountpoint of BTRFS filesystem\n");
return 1;
}
pid_t pid = fork();
if(-1 == pid)
{
fprintf(stderr, "ERROR: Fork failed\n");
return 1;
}
else if(pid)
{
int wstatus = 0;
if(wait(&wstatus) == -1)
{
fprintf(stderr, "ERROR: wait(2) error\n");
return 1;
}
if(!WIFEXITED(wstatus) || WEXITSTATUS(wstatus))
{
fprintf(stderr, "ERROR: Error running btrfs device stats\n");
return 1;
}
}
else
{
char * const child_args[] = { "/bin/btrfs", "device", "stats", argv[1], NULL };
execv(child_args[0], child_args);
fprintf(stderr, "ERROR: Can't execute %s\n", child_args[0]);
return 1;
}
pid = fork();
if(-1 == pid)
{
fprintf(stderr, "ERROR: Fork failed\n");
return 1;
}
else if(pid)
{
int wstatus = 0;
if(wait(&wstatus) == -1)
{
fprintf(stderr, "ERROR: wait(2) error\n");
return 1;
}
if(!WIFEXITED(wstatus) || WEXITSTATUS(wstatus))
{
fprintf(stderr, "ERROR: Error running btrfs subvol list\n");
return 1;
}
}
else
{
char * const child_args[] = { "/bin/btrfs", "subvol", "list", argv[1], NULL };
execv(child_args[0], child_args);
fprintf(stderr, "ERROR: Can't execute %s\n", child_args[0]);
return 1;
}
}
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