A program to get hostname in C Following is an example C program to read the hostname from C. #include<stdio.h> #include<string.h> #include<stdlib.h> #include<sys/socket.h> #include<errno.h> #include<netdb.h> #include<arpa/inet.h> int hostname_to_ip(char * , char *); int main(int argc , char *argv[]) { if(argc <2) { printf(“Please provide a hostname to resolve”); exit(1); } char *hostname = argv[1]; char …
c99 – compile standard C programs 1. The following usage example compiles foo.c and creates the executable file foo: c99 -o foo foo.c The following usage example compiles foo.c and creates the object file foo.o: c99 -c foo.c The following usage example compiles foo.c and creates the executable file a.out: c99 foo.c The following usage …
Valgrind is a powerful tool to detect potential memory leaks and understand memory profile of a process. Following is an example to start a program under Valgrind to detect leaks and analyze memory profile: valgrind –log-file=process_mem.log </path-of-binary-to-analyze> -N Example: Creating a memory leak in C program. In the following C code, the address …
Linux errno description errno – number of last error. If your program exits with non-zero exit code, it means it exited with error. If you know the error code that is good. If you don’t know the error code then it is tough to debug. Following are the errno of Linux system calls. These will …
Multi core CPU and memory load test using OpenMP on Linux A normal C program is serial, which means it can run only on one single core even though your processor has many cores. We have seen how to run CPU and memory load test on single core (eat CPU and Memory on single core). …
C program to eat CPU and memory I always found tough to find a right tool to perform CPU and memory load test on servers or on my test setup. Note that this one just puts load on 1 CPU core, I will also write one for multi core CPU, mem load test. So, I …