> $ curl gopher://sdf.org/0/users/saahriktu/filez/utils/leftpad.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char *buf;

char *leftpad(char *str, unsigned int len, char ch){
        unsigned int i;
        buf = (char *) malloc ((len + 1 + strlen(str)) * (sizeof(char)));
        for(i = 0; i < len; i++) buf[i] = ch;
        return strcat(buf, str);
}

int main(int argc, char **argv){
        if(argc < 4){
                printf("usage: leftpad string length char\n");
                return 1;
        }
        unsigned int al = (unsigned int) atol(argv[2]);
        printf("%s\n", leftpad(argv[1], al, argv[3][0]));
        free(buf);
        return 0;
}