C Programs

C program to print files in current directory in reverse order

The scandir() function scans the directory dirp, calling filter() on each directory entry. Entries for which filter() … Read more

Understanding execution and debugging of C program using ltrace

As we seen in previous post “Understanding Very Minimal C Program and its execution in Ubuntu Linux” … Read more

Understanding Linux Signals with simple C program

Signals are a limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX-compliant … Read more

Identify / Test file types in Linux using C program stat API

The file mode, stored in the st_mode field of the file attributes, contains two kinds of information: … Read more

C program to delete a file – remove API

In this simple C program, we demonstrate how to use Remove System call from C to delete … Read more

C program to verify the integrity of a file with md5 checksum

Most of the times we downloaded some files from the internet, and we also see people provides … Read more

Check if a File Exists in C

If we want to see whether certain file exists or not before doing some operation like read/write … Read more

Debugging using C macros __FILE__ and __func__ and __LINE__

Following program shows a sample example of how we can use C macros __FILE__ , __func__ and … Read more

C program to read the contents of a file into character buffer

Lets say we want to read the contents of some file and want to operate on these … Read more