Questions tagged [select-syscall]
7 questions
43
votes
3 answers
Why is select used in Linux
I was going through a serial program and I observed that they use select() before using read(). Why exactly is this required. Why cant we just directly call read() and check if it fails or not ? Also why do we have to increment the file descriptor…
user1667307
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3
votes
1 answer
What does 'left' field of strace select mean?
I'm using strace to investigate the select system call of a process and I'm trying to figure out what does left mean. Find below the debug line extracted from the strace log.
select(13, [6 7 8 11 12], [], NULL, {0, 10000}) = 1 (in [11], **left** {0,…
Alexandru Rusu
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3
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0 answers
Is it appropriate to put blocking (without O_NONBLOCK) file desciptors to select/poll in Linux?
man select
BUGS
Under Linux, select() may report a socket file descriptor as "ready
for reading", while nevertheless a subsequent read blocks. This could
for example happen when data has arrived but upon examination has
wrong checksum and…
Vi.
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vote
1 answer
How to correctly use in sys/select.h
When using the timer in the following code, either the "Error calling select" error appears, otherwise new data is expected:
timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
if( select(s + 1, &readmask, NULL, NULL, &tv ) <= 0 )
{
…
shaman888
- 283
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0
votes
1 answer
assembly mips use the function blt
where is my mistake? I need to print all the number that are bigger than zero and divided by 4.
it says:
(1).zip line 32: Runtime exception at 0x0040000c: address out of range 0x00000000
thanks a alot
num1: .word -8 , num3
num2: .word 1998 ,…
0
votes
2 answers
Can i use select to send data on multiple interfaces as fast as the interface can process
I am an experienced network programmer and am faced with a situation where i need some advice.
I am required to distribute some data on several outgoing interfaces (via different tcp socket connections, each corresponding to each interface).…
fkl
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votes
1 answer
Capturing syscalls of malicious python packages
I want to capture syscalls of malicious python packages. Is there any way to do this?
Or can I capture syscalls in wireshark?
For reference: Typosquatted Python packages, much like StackOverlow copy/paste.
Awaiz Khan
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