System Monitoring Tool -- Concurrency & Signals

Solutions:

• Ensure modularity with separate functions for each system monitoring task, such as memory utilization, connected users, and CPU utilization.
• Employed pipes for communication between different processes, enabling them to exchange data.
• Used fork() to create child processes for each system monitoring task. Each child process is responsible for executing a specific monitoring function.
• Data Sharing between parent process and child processes via pipes, which allows the parent process to collect the results from all child processes concurrently.
• Ensured proper synchronization and coordination between the parent and child processes by using waitpid() to wait for child processes to finish, handling signals, and managing resource allocation.
• Error Handling: Incorporated error-checking mechanisms to handle potential failures gracefully.
• Ensured that the output format remained consistent across all system monitoring tasks.

Functions:

MAX_LENGTH is defined as 1024

MAX_USERS is defined as 100

FLAGS_LENGTH is defined as 5

GB_CONVERTER is defined as1024 * 1024 * 1024

get_system_usage(int samples, int tdelay): This function retrieves system resource usage information, such as memory usage, and prints it to the standard output.

get_memory_utilization(char buf[MAX_LENGTH], double *physical_used): This function retrieves memory utilization information, including physical and virtual memory usage, and stores it in the provided buffer buf.

print_memory_utilization(int pipes[2], int graphics_pipe[2], int graphics, double *physical_used) This function reads memory utilization information from a pipe and optionally from a graphics pipe, then formats and prints the information to the standard output.

get_connected_user(char users[MAX_USERS][MAX_LENGTH], int *index) This function retrieves information about currently connected users from the system's user accounting database.

print_connected_user(int pipes[2], int rows) This function reads information about connected users from a pipe and prints it to the standard output. It expects the information to be formatted as an array of strings containing details about each connected user. get_cpu_cores() This function reads and returns the number of CPU cores from the /proc/cpuinfo file.

get_cpu_utilization(long cpu_data[2]) This function reads CPU utilization information from the /proc/stat file.

print_cpu_utilization(int pipes[2], long data[2], int id, int graphics, int cursor) This function reads CPU utilization data from a pipe and calculates CPU utilization percentage.

get_system_info() This function retrieves various system information such and prints this information to the standard output in a formatted manner.

print_system_status(int flags[FLAGS_LENGTH], int samples, int tdelay) This function prints various system status information, including memory utilization, connected users, CPU utilization, and system information, to the standard output.

How To Run

• Compile with makefile make
• Remove the generated object file and executable with clean make clean
• Use command line flags to specify the type of process table to display, set thresholds, or save tables in text or binary format. ./mySystemStatus —system —user —sequential —graphics —samples=10 —tdelay=1