/* gethostn.c: *  * Example of gethostname(2) : */#include <stdio.h>#include <unistd.h>#include <stdlib.h>#include <errno.h>#include <string.h>intmain(int argc,char **argv) {    int z;    char buf[32];    z = gethostname(buf,sizeof buf);    if ( z == -1 ) {        fprintf(stderr,"%s: gethostname(2)\n",            strerror(errno));        exit(1);    }    printf("host name = '%s'\n",buf);    z = getdomainname(buf,sizeof buf);        if ( z == -1 ) {        fprintf(stderr,"%s: getdomainname(2)\n",            strerror(errno));        exit(1);    }    printf("domain name = '%s'\n",buf);    return 0;}