extern char *sysroot_path (const char *path);
+extern int is_root_device (const char *device);
+
extern int xwrite (int sock, const void *buf, size_t len)
__attribute__((__warn_unused_result__));
extern int xread (int sock, void *buf, size_t len)
extern void free_strings (char **argv);
extern void free_stringslen (char **argv, int len);
+extern int is_power_of_2 (unsigned long v);
+
#define command(out,err,name,...) commandf((out),(err),0,(name),__VA_ARGS__)
#define commandr(out,err,name,...) commandrf((out),(err),0,(name),__VA_ARGS__)
#define commandv(out,err,argv) commandvf((out),(err),0,(argv))
reply_with_error ("%s: %s: expecting a device name", __func__, (path)); \
fail_stmt; \
} \
+ if (is_root_device (path)) \
+ reply_with_error ("%s: %s: device not found", __func__, path); \
if (device_name_translation ((path)) == -1) { \
int err = errno; \
int r = cancel_stmt; \