fflush Questions
5
Solved
#include <stdio.h>
int main()
{
char name[10];
for(int i=0;i<=10;i++)
{
printf("Who are you? ");
if(fgets(name,10,stdin)!=NULL)
printf("Glad to meet you, %s.\n",name);
}
return(0);...
Conformation asked 4/8, 2016 at 12:55
4
Solved
I am using the following command to output IPs from live tcpdump capture
sudo tcpdump -nn -q ip -l | awk '{print $3; fflush(stdout)}' >> ips.txt
I get the following output
192.168.0.100.5...
8
Solved
How to flush the stdin??
Why is it not working in the following code snippet?
#include <string.h>
#include <stdio.h>
#include <malloc.h>
#include <fcntl.h>
int main() {
in...
2
Solved
#include <stdio.h>
int main()
{
printf("Hello");
fflush(stdout);
return 0;
}
#include <stdio.h>
int main()
{
printf("Hello");
return 0;
}
I'm trying to unde...
7
Solved
So a quick Google search for fflush(stdin) for clearing the input buffer reveals numerous websites warning against using it. And yet that's exactly how my CS professor taught the class to do it.
H...
1
I'm getting some weird results, while trying to write data to files in C.<br/>
I thought that fclose() closes the *FILE and flushes the data from its buffer to the file.<br/>
But for so...
2
Solved
Is file_get_contents & file_put_contents reliable or can lead to loss of data? Benchmark results
I was wondering what happens if multiple scripts are sharing same file. I uploaded the test on remote server, where they use HDD to store data. There were 7 tests total, but the family of 6 are com...
Tideland asked 12/10, 2019 at 7:19
6
Solved
I thought fsync() does fflush() internally, so using fsync() on a stream is OK. But I am getting an unexpected result when executed under network I/O.
My code snippet:
FILE* fp = fopen(file, "wb"...
1
Solved
man fflush on Ubuntu:
For input streams associated with seekable files (e.g., disk files, but not pipes or terminals), fflush() discards any buffered data that has been fetched from the underlyi...
2
Solved
I am reading 'UNIX Network Programming: The Sockets Networking API' and in the example code they have an error handling function which contains the following lines:
fflush(stdout); /* in case stdo...
5
Solved
Can anything bad happen (like undefined behavior, file corruption, etc.) if several threads concurrently call fflush() on the same FILE* variable?
Clarification: I don't mean writing the file conc...
Speechless asked 20/8, 2016 at 11:36
2
Can anyone please explain me about difference between fpurge(FILE *stream) and fflush(FILE *stream) in C?
Both fflush() and fpurge() will discard any unwritten or unread data in the buffer.
Please ...
Industrials asked 31/5, 2016 at 5:31
1
Solved
I'm writing a script which does something like the following:
echo -n "Doing stuff, wait for it... "
do_stuff
(($?==0)) && echo SUCCESS || echo FAILURE
Excuse the poor bash skills. Anywa...
3
I know this is gonna be quite a stupid question, but after reading so many document about the whole "buffer" system, I can't understand why would people flush a stream but not a buffer.
I have see...
3
Solved
Below is sample code for using fflush():
#include <string.h>
#include <stdio.h>
#include <conio.h>
#include <io.h>
void flush(FILE *stream);
int main(void)
{
FILE *strea...
0
Platform: windows 8.1
IDE: vs2013
use c/c++
Process A read stdout of subprocess using pipe redirect.
but subprocess dont invoke fflush after printf, so processs A cant read anything from pipe bef...
Flaggy asked 20/3, 2014 at 8:12
1
Solved
3
Solved
1
Solved
Should fflush() not be used to flush a buffer even if it is an output stream?
What is it useful for? How do we flush a buffer in general?
3
I can't seem to figure out what's wrong with this code:
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#define MAX 100
#define TRUE 1
#defi...
0
i have a long run server program(say, program A) which is written in QT/c++. the program is not so stable so i decide to write a python script to restart it if it crashes. the problem is that the p...
3
Solved
I don't understand why sometimes I need to use fflush() and sometimes not.
My program is segfaulting at the moment and I am debugging it with print statements. When a program segfaults, does stdou...
4
1
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