#include <stdio.h>
 
int bar();
 
main()
{
        printf("PING");
        printf("%d", bar());
        printf("NETSTAT");
        printf("%d", bar());
}
 
bar()
{
        int i,j,k,z;
 
        printf("\n");
        for(i=0;i<=10;i++)
        {
                printf("[");
                for (j=0;j<i;j++)
                        printf("=");

                for (k=j;k<10;k++)
                        printf("");

                printf("]");

                z = (i * 10);

                printf("%3d%%", z);

                if(z == 100)
                {
                        printf(" [COMPLETED]");
                }

                printf("\r");
                fflush(stdout);
                usleep(59000);
        }
        printf("\n");
}

#include <stdio.h>
 
void bar();
 
int main()
{
        printf("PING");
        bar();
        printf("NETSTAT");
        bar();

        return(0);
}
 
void bar()
{
        int i,j;
 
        printf("\n");
        for(i=0;i<=10;i++)
        {
                printf("[");
                for (j=0;j<i;j++)
                        printf("=");

                for (; j<10;j++)
                        printf(" ");

                printf("]");

                printf("%3d%%", i*10);

                if(i == 10)
                {
                        printf(" [COMPLETED]");
                }

                printf("\r");
                fflush(stdout);
                usleep(59000);
        }
        printf("\n");
}

$ man open
OPEN(1)                   BSD General Commands Manual                  OPEN(1)

NAME
     open -- open files and directories

SYNOPSIS
     open [-a application] file ...

     open [-b bundle_identifier] file ...

     open [-e] file ...

     open [-t] file ...

     open [-f]

DESCRIPTION
     The open command opens a file (or a directory or URL), just as if you had
     double-clicked the file's icon. If no application name is specified, the
     default application as determined via LaunchServices is used to open the
     specified files.

system("open /path/to/file.html");