| ID | KIS001077 | Creation date | August 20, 2008 |
| Platform | S60 3rd Edition | Devices | All (S60 3rd Edition devices) |
| Category | Open C | Subcategory | IPC, Compatibility |
| Keywords (APIs, classes, methods, functions): |
To improve the performance and better adhere to POSIX standards, the next release of Open C will undergo some changes in the architecture. Some of the changes will also affect the binary compatibility with previous releases.
Proper permissions must now be defined when creating IPC (inter-process communication) resources (shm, semaphore</tt, and <tt>msgqueue). The flag argument (value) can no longer be just IPC_CREAT. Specifying only IPC_CREAT means that the IPC resource is created with absolutely no permissions, and will result in EACCESS error.
int msgid;
struct msqid_ds buf = {0};
msgid = msgget(1000, 512); /* returns with errno = 13 */
Starting from the next Open C release, IPC_CREAT has to be OR-ed with READ (0400) or/and WRITE (0200) permission.
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