Waitpidpid null 0
You will definitely get 2 of each, but the particular order is unclear. All you can be guaranteed is that it will start with a 2. Downvoter: would you care to comment on the downvote? Is the answer wrong? Too confusing? Both of their children will print 3 and exit. David Schwartz David Schwartz k 17 17 gold badges silver badges bronze badges.
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Covered by US Patent. Come for the solution, stay for everything else. Welcome to our community! As far as I understand from waitpid's man page, when calling waitpid with WNOHANG, the function should return 0 if there are no child processes to wait for. Computer Glossary Who is Who. This Site. Discussion Forums. Status for traced children which have stopped is provided even if this option is not specified. Since Linux 2. The child state changes to wait for are specified by ORing one or more of the following flags in options :.
Leave the child in a waitable state; a later wait call can be used to again retrieve the child status information. Wait for "clone" children only.
If omitted then wait for "non-clone" children only. Function wait returns -1 when there is an error, e. What is a valid output of this program? Hint: there are several correct solutions. Answer: This problem tests your understanding of exceptional control flow in C programs.
Caution: Don't overlook the printf function in main. Answer: 1,2,3,4,5 may need to insert various sleep calls to see these different values on a particular machine Consider the following C program.
The memory is byte addressable. Memory accesses are to 1-byte words not 4-byte words. Virtual addresses are 16 bits wide. Physical addresses are 14 bits wide. The page size is bytes. The TLB is 4-way set associative with 16 total entries. If there is a page fault, enter "-" for "PPN" and leave part C blank. The usage of the remaining 3 lower order bits is as follows: bit 0 indicates the use of the current block: 1 for allocated, 0 for free. Address Address 0xb 0x 0xb 0xb 0xbc 0xb 0xbc 0xb 0xbc 0xb 0xbc 0xb01c 0x 0xb01c 0xb 0x 0xb 0xb 0xbc 0xb 0xbc 0xb 0xbc 0xb 0xbc 0xb00c 0x 0xb00c 0xb 0x 0xb 0xb 0xbc 0xb 0xbc 0xb 0xbc 0xb 0xbc 0xaffc 0x 0xaffc Two threads execute the following function.