function::ctime - Linux

Overview

The function::ctime command is a versatile utility used for manipulating timestamps in C code. It’s particularly useful when dealing with time-related data structures and converting between different time representations.

Syntax

int ctime(const time_t *timer);

Options/Flags

None.

Examples

Converting a timestamp to a time string:

#include <stdio.h>
#include <time.h>

int main() {
    time_t timestamp = time(NULL);
    char *time_string = ctime(&timestamp);
    printf("Current time: %s", time_string);
    return 0;
}

Extracting the date and time components:

#include <stdio.h>
#include <time.h>

int main() {
    time_t timestamp = time(NULL);
    struct tm *time_info = localtime(&timestamp);
    printf("Date: %02d-%02d-%d\n", time_info->tm_mday, time_info->tm_mon + 1, time_info->tm_year + 1900);
    printf("Time: %02d:%02d:%02d\n", time_info->tm_hour, time_info->tm_min, time_info->tm_sec);
    return 0;
}

Common Issues

• Incorrect timestamp: Ensure that the provided timestamp is valid. Invalid timestamps can lead to unexpected results.

Integration

function::ctime can be integrated into custom time-handling functions or scripts. For instance, it can be used in conjunction with strptime to parse time strings and convert them to timestamps.

Related Commands

• time – Gets or sets the current system time.
• strptime – Parses a time string and converts it to a timestamp.
• localtime – Converts a timestamp to a struct tm representing the local time components.