diff options
Diffstat (limited to 'nixos/modules/system/boot/readonly-mountpoint.c')
| -rw-r--r-- | nixos/modules/system/boot/readonly-mountpoint.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/nixos/modules/system/boot/readonly-mountpoint.c b/nixos/modules/system/boot/readonly-mountpoint.c new file mode 100644 index 00000000000..27b66687382 --- /dev/null +++ b/nixos/modules/system/boot/readonly-mountpoint.c @@ -0,0 +1,20 @@ +#include <sys/statvfs.h> +#include <stdio.h> +#include <stdlib.h> + +int main(int argc, char ** argv) { + struct statvfs stat; + if (argc != 2) { + fprintf(stderr, "Usage: %s PATH", argv[0]); + exit(2); + } + if (statvfs(argv[1], &stat) != 0) { + perror("statvfs"); + exit(3); + } + if (stat.f_flag & ST_RDONLY) + exit(0); + else + exit(1); +} + |