diff options
| -rw-r--r-- | apps/ChangeLog.txt | 1 | ||||
| -rw-r--r-- | nuttx/Documentation/NuttX.html | 2 | ||||
| -rw-r--r-- | nuttx/Documentation/NuttxPortingGuide.html | 2 | ||||
| -rw-r--r-- | nuttx/Documentation/NuttxUserGuide.html | 39 |
4 files changed, 41 insertions, 3 deletions
diff --git a/apps/ChangeLog.txt b/apps/ChangeLog.txt index 0464c6198..cd15b430d 100644 --- a/apps/ChangeLog.txt +++ b/apps/ChangeLog.txt @@ -460,4 +460,5 @@ updated to detect key release events. That is kind of tricky in the USB HID keyboard report data. * apps/examples/wlan: Remove non-functional example. + * apps/examples/ostest/vfork.c: Added a test of vfork(). diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html index 876aa2a0a..21f732c97 100644 --- a/nuttx/Documentation/NuttX.html +++ b/nuttx/Documentation/NuttX.html @@ -8,7 +8,7 @@ <tr align="center" bgcolor="#e4e4e4"> <td> <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1> - <p>Last Updated: January 4, 2012</p> + <p>Last Updated: January 4, 2013</p> </td> </tr> </table> diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html index 24b4852e0..48fafb89f 100644 --- a/nuttx/Documentation/NuttxPortingGuide.html +++ b/nuttx/Documentation/NuttxPortingGuide.html @@ -12,7 +12,7 @@ <h1><big><font color="#3c34ec"> <i>NuttX RTOS Porting Guide</i> </font></big></h1> - <p>Last Updated: January 4, 2012</p> + <p>Last Updated: January 4, 2013</p> </td> </tr> </table> diff --git a/nuttx/Documentation/NuttxUserGuide.html b/nuttx/Documentation/NuttxUserGuide.html index d9dddf9be..5c76737e5 100644 --- a/nuttx/Documentation/NuttxUserGuide.html +++ b/nuttx/Documentation/NuttxUserGuide.html @@ -13,7 +13,7 @@ <h1><big><font color="#3c34ec"><i>NuttX Operating System<p>User's Manual</i></font></big></h1> <p><small>by</small></p> <p>Gregory Nutt<p> - <p>Last Updated: November 20, 2012</p> + <p>Last Updated: January 7, 2013</p> </td> </tr> </table> @@ -201,6 +201,7 @@ paragraphs. <li><a href="#exit">2.1.5 exit</a></li> <li><a href="#taskrestart">2.1.6 task_restart</a></li> <li><a href="#getpid">2.1.7 getpid</a></li> + <li><a href="#vfork">2.1.8 vfork</a></li> </ul> <H3><a name="taskcreate">2.1.1 task_create</a></H3> @@ -613,6 +614,40 @@ level. Compatible with the POSIX interface of the same name. </p> +<H3><a name="vfork">2.1.8 vfork</a></H3> +<p> + <b>Function Prototype:</b> +</p> + <ul><pre> +#include <unistd.h> +pid_t vfork(void); +</pre></ul> +<p> + <b>Description:</b> + The <code>vfork()</code> function has the same effect as <code>fork()</code>, except that the behavior is undefined if the process created by <code>vfork()</code> either modifies any data other than a variable of type <code>pid_t</code> used to store the return value from <code>vfork()</code>, or returns from the function in which <code>vfork()</code> was called, or calls any other function before successfully calling <code>_exit()</code> or one of the <code>exec</code> family of functions. +<p> +<blockquote><small> + <b>NOTE:</b> + <code>vfork()</code> is not an independent NuttX feature, but is implemented in architecture-specific logic (using only helper functions from the NuttX core logic). + As a result, <code>vfork()</code> may not be available on all architectures. +</small></blockquote> +<p> + <b>Input Parameters:</b> + None. +</p> +<p> + <b>Returned Value:</b> + Upon successful completion, <code>vfork()</code> returns 0 to the child process and returns + the process ID of the child process to the parent process. + Otherwise, -1 is returned to the parent, no child process is created, and <code>errno</code> is set to indicate the error. +<p> + <b>Assumptions/Limitations:</b> +</p> +<p> + <b>POSIX Compatibility:</b> + Compatible with the Unix interface of the same name. +</p> + <table width ="100%"> <tr bgcolor="#e4e4e4"> <td> @@ -6741,6 +6776,7 @@ int telldir(FAR DIR *dirp); <ul><pre> #include <unistd.h> +pid_t vfork(void); pid_t getpid(void); void _exit(int status) noreturn_function; unsigned int sleep(unsigned int seconds); @@ -8363,6 +8399,7 @@ notify a task when a message is available on a queue. <li><a href="#drvrunistdops">unistd.h</a>, <a href="#dirunistdops">unistd.h</a></li> <li><a href="#drvrunistdops">unlink</a></li> + <li><a href="#vfork">vfork</a></li> <li><a href="#standardio">vfprintf</a></li> <li><a href="#standardio">vprintf</a></li> <li><a href="#standardio">vsprintf</a></li> |