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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-09-23 11:41:05 -0600 |
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| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-09-23 11:41:05 -0600 |
| commit | 3edb44ada71e6cba49a0b4d4dfa67fce4756c0f9 (patch) | |
| tree | 68864d3643303dea0ad83a1f54658f24e83b19d4 /nuttx/Documentation | |
| parent | c163691f9446061dbab259c62fb86b8c0ced0cff (diff) | |
| download | nuttx-3edb44ada71e6cba49a0b4d4dfa67fce4756c0f9.tar.gz nuttx-3edb44ada71e6cba49a0b4d4dfa67fce4756c0f9.tar.bz2 nuttx-3edb44ada71e6cba49a0b4d4dfa67fce4756c0f9.zip | |
Flesh out shmctl() logic
Diffstat (limited to 'nuttx/Documentation')
| -rw-r--r-- | nuttx/Documentation/NuttxUserGuide.html | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/nuttx/Documentation/NuttxUserGuide.html b/nuttx/Documentation/NuttxUserGuide.html index ee5d45ae1..68a191917 100644 --- a/nuttx/Documentation/NuttxUserGuide.html +++ b/nuttx/Documentation/NuttxUserGuide.html @@ -9259,21 +9259,13 @@ int shmctl(int shmid, int cmd, FAR struct shmid_ds *buf); <li> <p> <code>IPC_SET</code>. - Set the value of the following members of the <code>shmid_ds</code> data structure associated with <code>shmid</code> to the corresponding value found in the structure pointed to by <code>buf</code>: - </p> - <ul> - <code>shm_perm.uid</code><br> - <code>shm_perm.gid</code><br> - <code>shm_perm.mode</code> (Low-order nine bits). - </ul> - <p> - <code>IPC_SET</code> can only be executed by a process that has an effective user ID equal to either that of a process with appropriate privileges or to the value of <code>shm_perm.cuid</code> or <code>shm_perm.uid</code> in the <code>shmid_ds</code> data structure associated with <code>shmid</code>. + Set the value of the <code>shm_perm.mode</code> member of the <code>shmid_ds</code> data structure associated with <code>shmid</code> to the corresponding value found in the structure pointed to by <code>buf</code>. </p> </li> <li> <p> <code>IPC_RMID</code>. - Remove the shared memory identifier specified by <code>shmid</code> from the system and destroy the shared memory segment and <code>shmid_ds</code> data structure associated with it. <code>IPC_RMID</code> can only be executed by a process that has an effective user ID equal to either that of a process with appropriate privileges or to the value of <code>shm_perm.cuid</code> or <code>shm_perm.uid</code> in the <code>shmid_ds</code> data structure associated with <code>shmid</code>. + Remove the shared memory identifier specified by <code>shmid</code> from the system and destroy the shared memory segment and <code>shmid_ds</code> data structure associated with it. </p> </li> </ul> @@ -9307,6 +9299,23 @@ int shmctl(int shmid, int cmd, FAR struct shmid_ds *buf); The <code>cmd</code> argument is <code>IPC_STAT</code> and the <code>gid</code> or <code>uid</code> value is too large to be stored in the structure pointed to by the <code>buf</code> argument. </li> </ul> +<p> + <b>POSIX Deviations</b> +<p> +<ul> + <li> + <code>IPC_SET</code>. + Does not set the the <code>shm_perm.uid</code> or <code>shm_perm.gid</code>members of the <code>shmid_ds</code> data structure associated with <code>shmid</code> because user and group IDs are not yet supported by NuttX + </li> + <li> + <code>IPC_SET</code>. + Does not restrict the operation to processes with appropriate privileges or matching user IDs in <code>shmid_ds</code> data structure associated with <code>shmid</code>. Again because user IDs and user/group privileges are are not yet supported by NuttX + </li> + <li> + <code>IPC_RMID</code>. + Does not restrict the operation to processes with appropriate privileges or matching user IDs in <code>shmid_ds</code> data structure associated with <code>shmid</code>. Again because user IDs and user/group privileges are are not yet supported by NuttX + </li> +</ul> <h3><a name="shmdt">2.12.4 <code>shmdt</code></a></h3> <p> |