All Questions
292
questions
-3
votes
1
answer
118
views
How to interface with a UNIX port? [closed]
I have encountered this same question in numerous forms over the past year, and have not been able to find the solution I am after. As the question has yet again reared its head, I am asking here with ...
0
votes
0
answers
109
views
How to properly handle byte buffers from C to Ada?
I'm trying to create a simple Ada program that would encrypt/decrypt files using the OpenSSL libcrypto library. One of the issues I'm facing is handling output streams properly. Trying to achieve ...
- 67
1
vote
1
answer
1k
views
ESP32 CAM only Web Server no Streaming
I connected esp32 cam using CameraWebServerStream in Arduino. I used a static ip address using port forwarding. However, when I enter the web server, the live streaming does not work. (Capture works ...
- 23
-1
votes
1
answer
126
views
Concept of a Stream Device
In my OS class, professor mentions that there are Stream and Storage devices. I mean to ask about Stream devices. I've also heard the terminology character devices.
On a Linux VM, the corresponding ...
- 1,183
0
votes
0
answers
193
views
File descriptors, terminal, and open file description
Consider this simple program:
#include <unistd.h>
int main () {
write(STDIN_FILENO, "hello\n", 6);
return 0;
}
and that the output will be viewed on the terminal even if I ...
- 1,183
1
vote
3
answers
149
views
Print in terminal after`freopen("file.txt", "wb", stdout);` (or similar solution to preserve a printing function)
I want to store the printed output of a function with freopen("file.txt", "wb", stdout); (or another solution, but the function matrix_output_printf() should remained untouched.
...
- 5,361
1
vote
3
answers
141
views
Stream the output of a void function using printf()
I want to store the output of a function (matrix_output_printf()) printing the following output (a matrix):
0 1 2
1 2 3
2 3 4
I would like to save this output in a text file.
In ...
- 5,361
0
votes
2
answers
62
views
Write the output of a function having many printf() statement in a text file
I have a function which writes a matrix using the printf() function. Is there a way to capture all the output of the matrix_output() function without having to each time re-open the file and append ...
- 5,361
0
votes
0
answers
76
views
Writing file with <fstream>/FILE in C/C++
I am a bit perplexed by the way FILE/fstream systems described in C/C++. For instance, I want to write a file which I know the size of beforehand, just like any image (for instance tga with 18 bytes ...
- 67
1
vote
1
answer
511
views
Pushing characters back to stdin in C
Say input stream (stdin) has "abc" on it. I want to push back, say, 3 '*' chars to stdin to get something like "***abc". I was trying to use ungetc() (I did ungetc('*', stdin)) for ...
- 87
0
votes
1
answer
66
views
C: writing content of array to txt file
im trying to implement the number guessing game. The game itself works fine. But now I want to add a function which safes the score of the last game (Number of trys and guessed number) in the ...
1
vote
1
answer
337
views
Read stdin with line break in C
I am very new to C and I am trying to read a stdin with line breaks. A text file will be used as a stream.
from what I have learned so far, I am trying this (when running the code, < text.txt is ...
- 23
0
votes
1
answer
543
views
How to stream Apache Arrow RecordBatches in C?
I read some data from a PostgreSQL database, convert it into RecordBatches and try to send the data to a client. But I fail to properly understand the usage of Apache Arrow C/GLib.
My information ...
- 99
1
vote
1
answer
183
views
fread like functionality for reading from an arbitrary stream
I am creating a library which parses a binary file format.
There are two functions:
void* read_buf(const void* buf, size_t size);
void* read(const char* filename);
In my read method I plan to read a ...
- 510
2
votes
2
answers
101
views
How to take unknown number of string from file in C?
I have a struct storing persons' names, surnames and salaries, but the number of their names is random. For example:
list.txt
John Smith Green 1000 //He has two names
Jennifer Wilson 2000 //She has ...
- 89