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btrfsctl: print usage when called with bad args

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This commit is contained in:
Linda Knippers 2008-06-09 22:23:13 -04:00 committed by David Woodhouse
parent e19357b687
commit d8d4df9474
1 changed files with 6 additions and 1 deletions
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7
btrfsctl.c
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@ -50,7 +50,7 @@ void print_usage(void)
printf("\t-s snap_name tree_root creates a new subvolume\n");
printf("\t-r [+-]size[gkm] resize the FS\n");
printf("\t-A device scans the device for a Btrfs filesystem\n");
printf("\t-a scans all devices for a Btrfs filesystems\n");
printf("\t-a scans all devices for Btrfs filesystems\n");
exit(1);
}
@ -119,6 +119,7 @@ int main(int ac, char **av)
}
if (command == 0) {
fprintf(stderr, "no valid commands given\n");
print_usage();
exit(1);
}
fname = av[ac - 1];
@ -149,6 +150,10 @@ int main(int ac, char **av)
else
args.name[0] = '\0';
ret = ioctl(fd, command, &args);
if (ret < 0) {
perror("ioctl:");
exit(1);
}
printf("ioctl returns %d\n", ret);
return 0;
}