sleep() does not put the process to sleep

Just recently I had to deal with the code that calls sleep() and suddenly I wondered if sleep will put the entire process to sleep. So I quickly checked man page and found the following.

SYNOPSIS
#include

   unsigned int sleep(unsigned int seconds);

DESCRIPTION
sleep() makes the current process sleep until seconds seconds
have elapsed or a signal arrives which is not ignored.

At first, I believed this man page but it just happened that I read Jefferey Rithcer's Windows Via C/C++ a few days ago and I remembered that on Windows there is no SuspendProcess() even though there is SuspendThread(). Jefferey explained that it is not quite possible to have SuspendProcess() in that Process can have many threads and these threads can come and go. Hence, it is pretty difficult to get all the threads to be suspended on Windows as thread is a scheduling unit.

Though I am looking at Linux for this particular case, it seems to me that I should check this out with other developers so I posted the question on stackoverflow(http://stackoverflow.com/questions/6192645/does-calling-sleep-from-pthread-put-thread-to-sleep-or-process).

Sure enough, I got an answer that my man page is outdated and I need to report to maintainer of man page to update the man page of my distribution. So the correct description of sleep is as follows. (taken from http://www.kernel.org/doc/man-pages/online/pages/man3/sleep.3.html)

SYNOPSIS
#include

   unsigned int sleep(unsigned int seconds);

DESCRIPTION
sleep() makes the calling thread sleep until seconds seconds have elapsed or a signal arrives which is not ignored.

So in conclusion, sleep() puts the calling thread to sleep not the process. Interesting!