#include <mqueue.h>
#include <semaphore.h>
+/* The prefix_len is the length of the path prefix ncluding trailing "/"
+ (or "/sem." for semaphores) as well as the trailing NUL. */
struct
{
const char *prefix;
- const size_t max_len;
+ const size_t prefix_len;
const char *description;
} ipc_names[] = {
- { "/dev/shm", CYG_MAX_PATH - 10, "POSIX shared memory object" },
- { "/dev/mqueue", CYG_MAX_PATH - 13, "POSIX message queue" },
- { "/dev/shm", CYG_MAX_PATH - 14, "POSIX semaphore" }
+ { "/dev/shm", 10, "POSIX shared memory object" },
+ { "/dev/mqueue", 13, "POSIX message queue" },
+ { "/dev/shm", 14, "POSIX semaphore" }
};
enum ipc_type_t
};
static bool
-check_path (char *res_name, ipc_type_t type, const char *name)
+check_path (char *res_name, ipc_type_t type, const char *name, size_t len)
{
/* Note that we require the existance of the apprpriate /dev subdirectories
for POSIX IPC object support, similar to Linux (which supports the
set_errno (EINVAL);
return false;
}
- if (strlen (name) > ipc_names[type].max_len)
+ if (len > PATH_MAX - ipc_names[type].prefix_len)
{
debug_printf ("%s name '%s' too long", ipc_names[type].description, name);
set_errno (ENAMETOOLONG);
static int
ipc_mutex_init (HANDLE *pmtx, const char *name)
{
- char buf[CYG_MAX_PATH];
+ char buf[MAX_PATH];
__small_sprintf (buf, "%scyg_pmtx/%s", cygheap->shared_prefix, name);
*pmtx = CreateMutex (&sec_all, FALSE, buf);
if (!*pmtx)
static int
ipc_cond_init (HANDLE *pevt, const char *name)
{
- char buf[CYG_MAX_PATH];
+ char buf[MAX_PATH];
__small_sprintf (buf, "%scyg_pevt/%s", cygheap->shared_prefix, name);
*pevt = CreateEvent (&sec_all, TRUE, FALSE, buf);
if (!*pevt)
extern "C" int
shm_open (const char *name, int oflag, mode_t mode)
{
- char shmname[CYG_MAX_PATH];
+ size_t len = strlen (name);
+ char shmname[ipc_names[shmem].prefix_len + len];
- if (!check_path (shmname, shmem, name))
+ if (!check_path (shmname, shmem, name, len))
return -1;
/* Check for valid flags. */
extern "C" int
shm_unlink (const char *name)
{
- char shmname[CYG_MAX_PATH];
+ size_t len = strlen (name);
+ char shmname[ipc_names[shmem].prefix_len + len];
- if (!check_path (shmname, shmem, name))
+ if (!check_path (shmname, shmem, name, len))
return -1;
return unlink (shmname);
struct mq_attr *attr;
struct mq_info *mqinfo;
LUID luid;
- char mqname[CYG_MAX_PATH];
- if (!check_path (mqname, mqueue, name))
+ size_t len = strlen (name);
+ char mqname[ipc_names[mqueue].prefix_len + len];
+
+ if (!check_path (mqname, mqueue, name, len))
return (mqd_t) -1;
myfault efault;
extern "C" int
mq_unlink (const char *name)
{
- char mqname[CYG_MAX_PATH];
+ size_t len = strlen (name);
+ char mqname[ipc_names[mqueue].prefix_len + len];
- if (!check_path (mqname, mqueue, name))
+ if (!check_path (mqname, mqueue, name, len))
return -1;
if (unlink (mqname) == -1)
return -1;
struct __stat64 statbuff;
sem_t *sem = SEM_FAILED;
sem_finfo sf;
- char semname[CYG_MAX_PATH];
bool wasopen = false;
ipc_flock file;
- if (!check_path (semname, semaphore, name))
+ size_t len = strlen (name);
+ char semname[ipc_names[semaphore].prefix_len + len];
+
+ if (!check_path (semname, semaphore, name, len))
return SEM_FAILED;
myfault efault;
extern "C" int
sem_unlink (const char *name)
{
- char semname[CYG_MAX_PATH];
+ size_t len = strlen (name);
+ char semname[ipc_names[semaphore].prefix_len + len];
- if (!check_path (semname, semaphore, name))
+ if (!check_path (semname, semaphore, name, len))
return -1;
if (unlink (semname) == -1)
return -1;