Shell Programming and Scripting

$ for airline in united delta american southwest; do
> echo $airline | sed 's/^\(.\)/\U\1/'
> done
United
Delta
American
Southwest

$ hostname
localhost
$ echo `hostname`
localhost

hostname | sed 's/^\(.\)/\U\1/'

/*
 * firstcap.c
 *
 * ksh93 custom builtin (error checking limited!)
 *
 */

#include <stdio.h>
#include <ctype.h>

int
b_firstcap(int argc, char *argv[], void *context)
{
    int c;
    char *s;

    if (argc != 2) {
       fprintf(stderr,"Usage: firstcap arg\n");
       return(2);
    }

    s = argv[1];
    c = *s++;

    printf("%c%s\n", toupper(c), s);

    return(0);
}

$ gcc -c firstcap.c
$ gcc -shared -o firstcap.so firstcap.o -lc
$ builtin -f ./firstcap.so firstcap
$ firstcap finnbarr
Finnbarr
$ firstcap united
United
$